Civil air defense door frame stabilizing structure

Abstract

The utility model relates to a civil air defense door frame stabilizing structure and belongs to the technical field of civil air defense door frames, the civil air defense door frame stabilizing structure comprises a supporting frame, a cross beam and fixing blocks, the two ends of the supporting frame and the two ends of the cross beam are each provided with a connecting block used for stretching into the fixing blocks and being matched with the fixing blocks in a clamped mode, and threaded grooves are formed in the connecting blocks; a fixing bolt used for being matched with the threaded groove in a threaded mode is arranged on the fixing block in a threaded and penetrating mode, a limiting block is arranged on the inner wall of the threaded groove in a sliding and penetrating mode, the sliding direction of the limiting block is perpendicular to the rotating axis of the fixing bolt, and a limiting groove used for being matched with the limiting block in a clamped mode is formed in the fixing bolt. The connecting block is provided with an adjusting mechanism used for adjusting sliding of the limiting block, and when the fixing bolt abuts against the bottom wall of the threaded groove, the limiting groove is aligned with the limiting block. The civil air defense door frame has the advantages that the fixing bolts are not prone to loosening after being used for a long time, and the stability of the civil air defense door frame can be guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of civil air defense door frames, and in particular to a stabilizing structure of a civil air defense door frame. Background Art

[0002] Civil defense door frames usually refer to door frames used in civil defense projects, and are mainly used as frame structures for doors of air-raid shelters, basements or other civil defense facilities. In order to cope with possible emergencies or security threats, civil defense door frames need to have certain protection capabilities and stability.

[0003] In the related art, for example, a Chinese patent document with publication number CN215332281U discloses a stable structure for a civil air defense door frame, including a support frame, a crossbeam, a support assembly and a disassembly assembly, wherein the disassembly assembly includes a fixed block and a fixed bolt, the support frame is plugged into the bottom of the fixed block, the crossbeam is plugged into the side wall of the fixed block, and a fixed bolt is threadedly penetrated on the surface of the fixed block, and the fixed bolt corresponds to the support frame and the crossbeam. The fixed bolt is threadedly connected to the support frame and the crossbeam respectively by rotating the fixed bolt, so as to achieve relative fixation of the fixed block, the support frame and the crossbeam.

[0004] With regard to the above-mentioned related technologies, during long-term use, the fixing bolts are prone to loosening, thereby reducing the stability of the door frame. Utility Model Content

[0005] In order to prevent the fixing bolts from loosening easily during long-term use, thereby helping to ensure the stability of the civil air defense door frame, the present application provides a stabilizing structure for a civil air defense door frame.

[0006] The present application provides a civil air defense door frame stabilization structure adopts the following technical solution:

[0007] A stabilizing structure for a civil air defense door frame comprises a supporting frame, a cross beam and a fixing block, both ends of the supporting frame and the cross beam are provided with connecting blocks for extending into the fixing block and engaging with the fixing block, a threaded groove is provided on the connecting block, a fixing bolt for engaging with the threaded groove is threadedly passed through the fixing block, a limit block is slidably passed through the inner wall of the threaded groove, the sliding direction of the limit block is perpendicular to the rotation axis of the fixing bolt, a limit groove for engaging with the limit block is provided on the fixing bolt, and the connecting block is provided with an adjusting mechanism for adjusting the sliding of the limit block, and when the fixing bolt abuts against the bottom wall of the threaded groove, the limit groove is aligned with the limit block.

[0008] By adopting the above technical solution, the connecting block of the support frame and the crossbeam is extended into the fixed block, so that the thread of the fixing bolt passes through the fixing block and extends into the corresponding thread groove, and the fixing bolt is rotated to connect the fixing bolt with the thread groove until the fixing bolt abuts against the bottom wall of the thread groove. At this time, the limit groove is aligned with the limit block, and the limit block is adjusted by the adjustment mechanism to slide in the direction close to the center of the thread groove so that the limit block extends into the limit groove, thereby limiting the fixing bolt, so that the fixing bolt is not easy to loosen away from the thread groove under long-term use, which helps to ensure the stability of the civil air defense door frame.

[0009] Preferably, the adjustment mechanism includes a first spring arranged in the connecting block, an adjustment rope arranged on the limit block and an adjustment assembly arranged in the connecting block, the first spring is used to push the limit block to slide in a direction close to the center of the thread groove, the adjustment rope is used to pull the limit block to slide in a direction away from the center of the thread groove, and the adjustment assembly is used to pull or loosen the adjustment rope.

[0010] By adopting the above technical solution, the adjustment rope is loosened through the adjustment component, so that the tension of the adjustment rope on the limit block is reduced, and the limit block is pushed to slide toward the center of the thread groove through the compressed first spring, which helps the limit block to extend into the limit groove to limit the fixing bolt, so that the fixing bolt is not easy to loosen away from the thread groove under long-term use, which helps to ensure the stability of the civil defense door frame.

[0011] Preferably, the adjusting assembly includes an abutment block slidably penetrated through the bottom wall of the threaded groove and an elastic member arranged in the connecting block, the sliding direction of the abutment block is parallel to the rotation axis of the fixing bolt, the abutment block is used to abut against the bottom of the fixing bolt, the end of the adjusting rope away from the limit block slides through the connecting block and is connected to the side of the abutment block away from the threaded groove, the elastic member is used to push the abutment block to slide in a direction close to the threaded groove, and when the elastic member pushes the abutment block to slide in a direction close to the threaded groove, the abutment block pulls the adjusting rope.

[0012] By adopting the above technical solution, when the fixing bolt is connected to the threaded groove, the abutment block is gradually pressed to slide in the direction away from the threaded groove, so that the abutment block relaxes the tension on the adjusting rope, which helps the limit block to have a tendency to slide in the direction close to the center of the threaded groove, facilitates the clamping fit between the limit block and the limit groove, and makes the fixing bolt not easy to loosen under long-term use, which helps to ensure the stability of the civil defense door frame.

[0013] Preferably, the elastic member includes a second spring for pushing the abutment block to slide in a direction close to the thread groove, one end of the second spring is arranged in the connecting block, and the other end is arranged on the abutment block, and the elastic force of the second spring is greater than the elastic force of the first spring.

[0014] Preferably, a screw is passed through the inner thread of the fixing bolt, the rotation axis of the screw is parallel to the rotation axis of the fixing bolt, the abutment block is aligned with the screw, and the rotational friction between the screw and the fixing bolt is smaller than the rotational friction between the fixing bolt and the inner wall of the thread groove.

[0015] By adopting the above technical solution, an external tool is used to rotate the screw, so that the screw and the fixing bolt rotate relative to each other, and the screw moves in the direction away from the abutment block, reducing the abutment force on the abutment block. The abutment block slides in the direction close to the thread groove under the push of the elastic member, and the adjusting rope is pulled to move, so that the adjusting rope pulls the limit block to slide in the direction away from the thread groove until the limit block is completely disengaged from the limit groove, and then the fixing bolt is rotated to disengage the fixing bolt from the thread groove, thereby realizing the disassembly of the support frame and the beam.

[0016] Preferably, an operating groove is formed at one end of the screw away from the thread groove.

[0017] Preferably, a surface of the abutment block close to the thread groove is an arc surface, and the arc surface is convex toward the direction close to the thread groove.

[0018] Preferably, the limiting groove is opened along the circumference of the fixing bolt.

[0019] In summary, this application includes the following beneficial technical effects:

[0020] Extend the connecting block of the support frame and the crossbeam into the fixed block, so that the thread of the fixing bolt passes through the fixing block and extends into the corresponding thread groove, and rotate the fixing bolt to connect the fixing bolt with the thread groove until the fixing bolt abuts against the bottom wall of the thread groove. At this time, the limit groove is aligned with the limit block, and the limit block is adjusted by the adjustment mechanism to slide in the direction close to the center of the thread groove so that the limit block extends into the limit groove, thereby limiting the fixing bolt, so that the fixing bolt is not easy to loosen away from the thread groove under long-term use, which helps to ensure the stability of the civil air defense door frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0022] Figure 2 It is a partial structural cross-sectional view of an embodiment of the present application.

[0023] Figure 3 yes Figure 2 Enlarged view of part A.

[0024] Explanation of the accompanying drawings: 1. Support frame; 2. Crossbeam; 3. Fixed block; 4. Connecting block; 5. Threaded groove; 6. Fixing bolt; 7. Limit block; 8. Limit groove; 9. First spring; 10. Adjusting rope; 11. Abutment block; 12. Second spring; 13. Screw; 14. Operating groove; 15. Mounting groove; 16. Sliding groove. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-3 This application is described in further detail.

[0026] The present application embodiment discloses a civil air defense door frame stabilizing structure. Figure 1 and Figure 2 The stable structure of the civil air defense door frame includes a support frame 1, a cross beam 2 and a fixed block 3. The fixed block 3 is L-shaped and has a hollow through structure. Both ends of the support frame 1 and the cross beam 2 are fixed with connecting blocks 4 for extending into the fixed block 3 and engaging with the fixed block 3. Thread grooves 5 are provided on opposite sides of the connecting block 4. A fixing bolt 6 for threadably engaging with the thread groove 5 is threadedly penetrated on the fixing block 3, and the fixing bolt 6 corresponds to the thread groove 5 one by one.

[0027] Reference Figure 2 and Figure 3 , installation grooves 15 are provided on opposite sides of the inner wall of each thread groove 5, and a limit block 7 is slidably penetrated in each installation groove 15, and the sliding direction of the limit block 7 is perpendicular to the rotation axis of the fixing bolt 6, that is, the sliding direction of the limit block 7 is perpendicular to the depth direction of the thread groove 5, and a limit groove 8 is provided at one end of the fixing bolt 6 close to its own head, and the limit groove 8 is used for clamping with the limit block 7. The limit groove 8 is provided along the circumference of the fixing bolt 6, which provides convenience for the clamping cooperation between the limit block 7 and the limit groove 8; an adjustment mechanism for adjusting the sliding of the limit block 7 is provided in the installation groove 15, and when the fixing bolt 6 abuts against the bottom wall of the thread groove 5, the limit groove 8 is aligned with the limit block 7.

[0028] During installation, the connecting blocks 4 of the support frame 1 and the cross beam 2 are extended into the fixing block 3, and then the fixing bolt 6 is threaded through the fixing block 3 and extended into the corresponding threaded groove 5. At this time, the limit block 7 is located in the installation groove 15 under the action of the adjusting mechanism, and then the fixing bolt 6 is rotated to connect the fixing bolt 6 with the threaded groove 5 until the fixing bolt 6 abuts against the bottom wall of the threaded groove 5. At this time, the limit groove 8 is aligned with the limit block 7, and then the limit block 7 is adjusted by the adjusting mechanism to slide in the direction close to the limit groove 8, so that the limit block 7 extends into the limit groove 8, thereby limiting the fixing bolt 6, so that the fixing bolt 6 is not easy to loosen away from the threaded groove 5 during long-term use, which helps to ensure the stability of the civil air defense door frame and meet the stability requirements of the civil air defense project.

[0029] Reference Figure 2 and Figure 3To facilitate the sliding of the adjustment limit block 7, the adjustment mechanism includes a first spring 9, an adjustment rope 10 and an adjustment component. The first spring 9 is located in the installation groove 15, and the extension direction of the first spring 9 is parallel to the sliding direction of the limit block 7 in the corresponding installation groove 15. One end of the first spring 9 is fixed to the bottom wall of the corresponding installation groove 15, and the other end is fixed to the side of the corresponding limit block 7 close to the bottom wall of the installation groove 15. The first spring 9 is used to push the limit block 7 to slide toward the direction close to the center of the threaded groove 5; one end of the adjustment rope 10 is fixed to the side of the limit block 7 close to the first spring 9, and the other end is slidably penetrated on the corresponding connecting block 4, and the end of the adjustment rope 10 close to the limit block 7 is located in the first spring 9. The adjustment rope 10 is used to pull the limit block 7 to slide in the direction away from the center of the threaded groove 5. The adjusting component is arranged in the connecting block 4, and the adjusting component is used to pull or loosen the adjustment rope 10.

[0030] Reference Figure 2 and Figure 3 In order to facilitate pulling or loosening the adjustment rope 10, a sliding groove 16 is opened on the bottom wall of the thread groove 5. The adjustment component includes an abutment block 11 and an elastic member. The abutment block 11 is slidably arranged in the sliding groove 16. The cross section of the abutment block 11 is T-shaped, and the longitudinal section of the abutment block 11 is circular. The sliding direction of the abutment block 11 is parallel to the rotation axis of the fixing bolt 6. The end of the abutment block 11 close to the thread groove 5 is an arc surface, and the arc surface is convex toward the direction close to the thread groove 5. The arc surface of the abutment block 11 is used to abut against the bottom of the fixing bolt 6. It helps to fix the rotation of the bolt 6; the end of the adjusting rope 10 away from the limit block 7 slides through the connecting block 4 and extends into the sliding groove 16 and is fixed to the side of the corresponding abutment block 11 away from the thread groove 5. Specifically, the adjusting rope 10 extends into the sliding groove 16 from the side of the sliding groove 16 away from the thread groove 5; the elastic member is arranged in the sliding groove 16, and the elastic member is used to push the abutment block 11 to slide in the direction close to the thread groove 5. When the elastic member pushes the abutment block 11 to slide in the direction close to the thread groove 5, the abutment block 11 pulls the adjusting rope 10.

[0031] Reference Figure 2 and Figure 3 In order to facilitate the sliding of the abutment block 11 toward the direction close to the thread groove 5, the elastic member includes a second spring 12, the second spring 12 is located in the sliding groove 16, the extension direction of the second spring 12 is parallel to the sliding direction of the abutment block 11, one end of the second spring 12 is fixedly arranged on the bottom wall of the sliding groove 16 away from the thread groove 5, and the other end is fixedly arranged on the side of the abutment block 11 away from the thread groove 5, and the elastic force of the second spring 12 is greater than the sum of the elastic forces of the corresponding two first springs 9.

[0032] When the fixing bolt 6 is disengaged from the thread groove 5 , the abutment block 11 extends into the thread groove 5 under the thrust of the second spring 12 , and the abutment block 11 pulls the adjustment rope 10 , so that the adjustment rope 10 pulls the limit block 7 to slide in a direction away from the thread groove 5 and extend into the installation groove 15 . When the fixing bolt 6 is gradually screwed into the thread groove 5, the fixing bolt 6 gradually approaches the abutment block 11, and then the fixing bolt 6 abuts against the abutment block 11. As the fixing bolt 6 continues to be screwed in, the fixing bolt 6 pushes the abutment block 11 to slide in the direction close to the sliding groove 16, and the pulling force of the abutment block 11 on the adjusting rope 10 is reduced, loosening the adjusting rope 10. At this time, the limit block 7 has a tendency to slide in the direction close to the thread groove 5 under the thrust of the first spring 9, so that the limit block 7 abuts against the outer wall of the fixing bolt 6, and the first spring 9 is in a compressed state until the fixing bolt 6 rotates to abut against the bottom wall of the thread groove 5. At this time, the limit groove 8 moves to align with the limit block 7. At this time, the compressed first spring 9 pushes the corresponding limit block 7 to slide in the direction close to the thread groove 5 and extend into the limit groove 8, thereby limiting the position of the fixing bolt 6, so that the fixing bolt 6 is not easy to loosen during long-term use, which helps to ensure the stability of the civil defense door frame.

[0033] Reference Figure 2 and Figure 3 The fixing bolt 6 is internally threaded with a screw rod 13, the length of the screw rod 13 is equal to that of the fixing bolt 6, the screw rod 13 is located at the center of the fixing bolt 6, the diameter of the abutment block 11 is smaller than the diameter of the screw rod 13, the abutment block 11 is aligned with the screw rod 13, the rotation axis of the screw rod 13 is parallel to the rotation axis of the fixing bolt 6, and the rotational friction between the screw rod 13 and the fixing bolt 6 is smaller than the rotational friction between the fixing bolt 6 and the inner wall of the thread groove 5; an operating groove 14 is provided at one end of the screw rod 13 away from the abutment block 11, and the operating groove 14 is cross-shaped, which is convenient for the operator to use external tools to realize the relative rotation of the screw rod 13 and the fixing bolt 6.

[0034] When it is necessary to disassemble the civil defense door frame, an external tool such as a cross cutter is used to rotate the screw 13, so that the screw 13 and the fixing bolt 6 rotate relative to each other, and the screw 13 moves in the direction away from the abutment block 11, reducing the abutment force on the abutment block 11, so that the abutment block 11 slides in the direction close to the thread groove 5 under the elastic action of the second spring 12, and the abutment block 11 drives the adjustment rope 10 to move, so that the adjustment rope 10 pulls the limit block 7 to slide in the direction away from the thread groove 5 until the limit block 7 is completely disengaged from the limit groove 8, and then the fixing bolt 6 is rotated to disengage the fixing bolt 6 from the thread groove 5, thereby realizing the disassembly of the support frame 1 and the beam 2.

[0035] The implementation principle of the embodiment of the present application is as follows: during installation, the connecting block 4 of the support frame 1 and the cross beam 2 is extended into the fixing block 3, so that the screw rod 13 is located in the fixing bolt 6 and is flush with the two ends of the fixing bolt 6, and then the fixing bolt 6 is threaded through the fixing block 3 and extended into the corresponding thread groove 5. At this time, the abutment block 11 is extended into the thread groove 5 under the thrust of the second spring 12, and the limit block 7 is located in the installation groove 15 under the pulling action of the adjustment rope 10; then the fixing bolt 6 is rotated to make the fixing bolt 6 threadably connected with the thread groove 5, and the fixing bolt 6 gradually approaches the abutment block 11, and then the fixing bolt 6 abuts against the abutment block 11. As the fixing bolt 6 continues to be screwed in, the fixing bolt 6 pushes the abutment block 11 By sliding in the direction close to the sliding groove 16, the tension of the abutment block 11 on the adjusting rope 10 is reduced, and the adjusting rope 10 is loosened, so that the limit block 7 has a tendency to slide in the direction close to the thread groove 5 under the thrust of the first spring 9, and the limit block 7 abuts against the outer wall of the fixing bolt 6 until the fixing bolt 6 rotates to abut against the bottom wall of the thread groove 5. At this time, the limit groove 8 moves to align with the limit block 7. At this time, the compressed first spring 9 pushes the corresponding limit block 7 to slide in the direction close to the center of the thread groove 5, so that the limit block 7 extends into the limit groove 8 to limit the position of the fixing bolt 6, thereby making the fixing bolt 6 not easy to loosen during long-term use, which helps to ensure the stability of the civil defense door frame.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A stabilizing structure for a civil air defense door frame, comprising a support frame (1), a crossbeam (2) and a fixing block (3), characterized in that: Both ends of the support frame (1) and the crossbeam (2) are provided with connecting blocks (4) for extending into the fixing block (3) and engaging with the fixing block (3); a threaded groove (5) is provided on the connecting block (4); a fixing bolt (6) for engaging with the threaded groove (5) is threadedly penetrated on the fixing block (3); a limit block (7) is slidably penetrated on the inner wall of the threaded groove (5); the sliding direction of the limit block (7) is perpendicular to the rotation axis of the fixing bolt (6); a limit groove (8) for engaging with the limit block (7) is provided on the fixing bolt (6); an adjusting mechanism for adjusting the sliding of the limit block (7) is provided on the connecting block (4); when the fixing bolt (6) abuts against the bottom wall of the threaded groove (5), the limit groove (8) is aligned with the limit block (7).

2. The civil air defense door frame stabilizing structure according to claim 1 is characterized in that: The adjustment mechanism comprises a first spring (9) arranged in the connection block (4), an adjustment rope (10) arranged on the limit block (7) and an adjustment component arranged in the connection block (4); the first spring (9) is used to push the limit block (7) to slide in a direction close to the center of the thread groove (5); the adjustment rope (10) is used to pull the limit block (7) to slide in a direction away from the center of the thread groove (5); and the adjustment component is used to pull or loosen the adjustment rope (10).

3. The civil air defense door frame stabilizing structure according to claim 2 is characterized in that: The adjustment assembly comprises an abutment block (11) slidably penetrated through the bottom wall of the threaded groove (5) and an elastic member arranged in the connecting block (4); the sliding direction of the abutment block (11) is parallel to the rotation axis of the fixing bolt (6); the abutment block (11) is used to abut against the bottom of the fixing bolt (6); one end of the adjustment rope (10) away from the limit block (7) slides through the connecting block (4) and is connected to the side of the abutment block (11) away from the threaded groove (5); the elastic member is used to push the abutment block (11) to slide in a direction close to the threaded groove (5); when the elastic member pushes the abutment block (11) to slide in a direction close to the threaded groove (5), the abutment block (11) pulls the adjustment rope (10).

4. The civil air defense door frame stabilizing structure according to claim 3 is characterized in that: The elastic member comprises a second spring (12) for pushing the abutment block (11) to slide in a direction close to the thread groove (5); one end of the second spring (12) is arranged in the connection block (4) and the other end is arranged on the abutment block (11); the elastic force of the second spring (12) is greater than the elastic force of the first spring (9).

5. The civil air defense door frame stabilizing structure according to claim 3 is characterized in that: A screw rod (13) is inserted through the internal thread of the fixing bolt (6), the rotation axis of the screw rod (13) is parallel to the rotation axis of the fixing bolt (6), the abutment block (11) is aligned with the screw rod (13), and the rotational friction force between the screw rod (13) and the fixing bolt (6) is smaller than the rotational friction force between the fixing bolt (6) and the inner wall of the thread groove (5).

6. The civil air defense door frame stabilizing structure according to claim 5, characterized in that: An operating groove (14) is formed at one end of the screw rod (13) away from the thread groove (5).

7. The civil air defense door frame stabilizing structure according to claim 3 is characterized in that: A surface of the abutment block (11) close to the thread groove (5) is an arc surface, and the arc surface is convex toward the direction close to the thread groove (5).

8. A civil air defense door frame stabilizing structure according to any one of claims 1 to 7, characterized in that: The limiting groove (8) is opened along the circumference of the fixing bolt (6).

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