Supporting structure for reducing hinge load of civil air defense door

Abstract

The utility model discloses a supporting structure for reducing hinge load of a civil air defense door, which comprises a sliding sleeve arranged on a door leaf, an upper sliding rod and a lower sliding rod are arranged in the sliding sleeve in a sliding and penetrating mode, the upper sliding rod and the lower sliding rod are fixedly connected through an inhaul cable, a spring is arranged between the upper sliding rod and the lower sliding rod, and a supporting plate is fixedly arranged at the bottom of the lower sliding rod. A rack is arranged on the side wall of the upper sliding rod, a first gear is rotationally installed on the door leaf and meshed with the first rack, a third fixed shaft is fixedly arranged on the door leaf, the third fixed shaft is rotationally sleeved with a shaft sleeve, the shaft sleeve is fixedly sleeved with a second gear and a worm gear, the second gear is meshed with the first gear, and the first gear is larger than the second gear. A worm is rotationally installed on the door leaf and meshed with the worm gear, a third gear is fixedly arranged at one end of the worm, a fourth gear is rotationally installed on the door leaf and meshed with the third gear, and a hexagon nut is arranged on the central axis of the fourth gear. According to the structure, the door leaf can be effectively supported, and meanwhile the ground is effectively prevented from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of civil air defense doors, and particularly relates to a support structure for reducing the hinge load of civil air defense doors. Background Technique

[0002] The main body of the door leaf of a civil air defense door is mainly hinged to the door frame through hinges. Due to the heavy weight of the door leaf, generally when the door leaf is opened, a support needs to be placed under the door leaf to prevent the door leaf from falling for a long time and damaging the hinges. Once the hinge structure is damaged, it will be difficult for the civil air defense door to open and close.

[0003] At present, the vast majority of civil air defense doors do not have a dedicated support structure, and their supports are mainly foreign objects on the non-main body of the civil air defense door. Since the bottom of the door leaf is close to the ground, there will be the following problems when inserting general supports.

[0004] First of all, the insertion and removal of the support will scratch the ground and cause damage to the ground. Secondly, it is difficult for the support to achieve the actual support effect. The support that wants to be inserted into the space between the door leaf and the ground is itself a non-rigid object, and the elastic force generated after its deformation cannot be verified by measurement means to determine whether it meets the support strength.

[0005] Therefore, it is necessary to design a support structure for reducing the hinge load of civil air defense doors, which can effectively support the door leaf and at the same time effectively prevent damage to the ground. Content of the Utility Model

[0006] The purpose of the utility model is to provide a support structure for reducing the hinge load of civil air defense doors to solve the problems described in the background technique.

[0007] The technical solution of the utility model is realized as follows:

[0008] A support structure for reducing the hinge load of a civil air defense door includes a sliding sleeve detachably installed on the door leaf. A vertically arranged sliding groove is provided in the sliding sleeve. An upper sliding rod and a lower sliding rod are slidably penetrated in the sliding groove. The bottom of the upper sliding rod and the top of the lower sliding rod are fixedly connected by a cable. A spring sleeved outside the cable is further provided in the sliding groove between the upper sliding rod and the lower sliding rod. A support plate is fixedly provided at the bottom of the lower sliding rod. A rack is provided on the side wall of the upper sliding rod. A first gear is rotatably installed on the door leaf, and the first gear meshes with the first rack. A third fixed shaft is further fixedly provided on the door leaf. A sleeve is rotatably sleeved on the third fixed shaft. A second gear and a worm gear are fixedly sleeved on the sleeve. The second gear meshes with the first gear, and the first gear is larger than the second gear. A worm is further rotatably installed on the door leaf, and the worm meshes with the worm gear. A third gear is fixedly provided at one end of the worm. A fourth gear is further rotatably installed on the door leaf, and the fourth gear meshes with the third gear. A hexagonal nut is further provided on the central axis of the fourth gear.

[0009] When using the above - mentioned solution, the sliding sleeve is set at a place close to the edge of the door leaf and far from the hinge. The gravity received by the door leaf can be calculated through the total weight of the door leaf. If the door leaf is supported at both ends of the bottom, it can be simply calculated that each end provides a supporting force equal to half of the gravity of the door leaf to keep the door leaf stable. One - end supporting force is provided by the hinge, and the supporting force at the other end is provided by the supporting structure.

[0010] When it is necessary to use the supporting structure to support the door leaf, turn the hexagon nut with a torque wrench. The hexagon nut drives the fourth gear to rotate. The fourth gear drives the third gear to rotate. The third gear drives the worm to rotate. The worm drives the worm wheel to rotate. The worm wheel drives the second gear to rotate. The second gear drives the first gear to rotate. The first gear drives the rack to move downward. The rack drives the upper sliding rod to move downward. The upper sliding rod moves downward in the sliding sleeve and pushes the lower sliding rod downward through the spring until the support plate abuts against the ground.

[0011] Generally, the elastic force provided by the spring has a linear relationship with the compression stroke of the spring. First, calculate the compression stroke required when the spring provides an elastic force (i.e., supporting force) equal to half of the gravity of the door leaf. Then, calculate through the amount of movement of the upper sliding rod and the lower sliding rod in and out of the sliding sleeve to obtain the compression stroke of the spring. Continuously turn the hexagon nut with a torque wrench so that the upper sliding rod moves downward until the spring reaches the preset compression stroke, and record the torque value of the hexagon nut at this moment. Convert the monitoring of the supporting force of the spring (i.e., the compression stroke of the spring) into the monitoring of the torque of the hexagon nut.

[0012] After the upper sliding rod moves to the preset position (i.e., the preset spring compression position), the self - locking structure of the worm and worm wheel can keep the first gear stationary, thus keeping the rack stationary and locking the position of the upper sliding rod.

[0013] When the supporting structure is used for a period of time and the spring shows an elastic force loss, the monitoring of the compression stroke of the spring will fail. At this time, the supporting force of the spring can be compensated through the torque monitoring of the hexagon nut. When the spring shows an elastic force loss, the torque will decrease when turning the hexagon nut with a torque wrench. At this time, only need to increase the torque of the hexagon nut to the original torque value.

[0014] By setting the support plate, it can prevent the situation of excessive supporting force and too small area of the supporting part resulting in excessive pressure. The support plate reduces the pressure of the lower sliding rod on the ground, thus preventing damage to the ground.

[0015] By setting the spring, using the deformation amount monitoring of the spring and the torque monitoring of the hexagon nut to obtain the supporting force within a certain range, so that the supporting force provided by the supporting structure is close to the supporting force provided by the hinge, thereby reducing the external force on the hinge, effectively reducing the hinge load and improving the service life of the hinge.

[0016] By setting a detachable sliding sleeve, when the spring fails, the spring can be replaced by disassembling the sliding sleeve.

[0017] By setting a cable to connect the upper sliding rod and the lower sliding rod, when it is necessary to retract the lower sliding rod, the upwardly moving upper sliding rod pulls the lower sliding rod upward through the cable, so that the support plate leaves the ground.

[0018] A further technical solution is that a first fixed shaft is fixedly provided on the door leaf, and a first gear is rotatably sleeved and installed on the first fixed shaft.

[0019] A further technical solution is that a second fixed shaft is fixedly provided on the door leaf, and a fourth gear is rotatably sleeved and installed on the second fixed shaft.

[0020] A further technical solution is that a mounting seat is fixedly provided on the door leaf, and a worm is rotatably installed in the mounting seat.

[0021] A further technical solution is that the third gear and the fourth gear are bevel gears.

[0022] A further technical solution is that an external nut is further provided at the end of the third fixed shaft, and a limit block for restricting the shaft sleeve from coming out is also screwed at the end of the third fixed shaft.

[0023] The beneficial effects of the present utility model are as follows:

[0024] 1. Protect the hinge: Through precise calculation and setting, the scheme ensures that the support structure bears about half of the gravity of the door leaf. Through precise adjustment of the supporting force, the external force on the hinge is reduced, thereby effectively reducing the load on the hinge, helping to improve the service life of the hinge, and thus maintaining the stability of the door leaf.

[0025] 2. Flexible adjustment: Through a set of fine gear and worm and worm gear systems, the supporting force can be precisely adjusted to meet the supporting requirements of door leaves of different weights.

[0026] 3. Dual monitoring system: The scheme innovatively converts the compression stroke monitoring of the spring into the more easily operable and observable torque monitoring of the hexagonal nut. This not only facilitates daily inspections to understand the situation of the supporting force, but also enables accurate compensation when the spring elasticity is depleted.

[0027] 4. Self-locking function: Utilizing the self-locking characteristic of the worm and worm gear, it can automatically lock after being adjusted to a predetermined position, enhancing the stability and safety of the system.

[0028] 5. Protect the ground: By setting a support plate, the contact area between the support part and the ground is increased, effectively reducing the pressure on the ground and avoiding the problem of damaging the ground due to excessive pressure.

[0029] 6. Convenient maintenance: The sliding sleeve is designed to be detachable, facilitating replacement after the spring fails, reducing the maintenance cost and difficulty. Brief Description of the Drawings

[0030] Figure 1 is the overall schematic diagram of the present utility model;

[0031] Figure 2 is Figure 1 the enlarged view at position A in

[0032] Figure 3 is Figure 2 the top view schematic diagram of the cooperation of the second gear, the third gear, the fourth gear and the worm and worm gear in

[0033] In the figure, 1, ground; 2, hinge; 3, door leaf; 4, sliding sleeve; 5, chute; 6, spring; 7, lower sliding rod; 8, support plate; 9, upper sliding rod; 10, rack; 11, first gear; 12, first fixed shaft; 13, second gear; 14, worm wheel; 15, limit block; 16, worm; 17, mounting seat; 18, third gear; 19, fourth gear; 20, second fixed shaft; 21, hexagon nut; 22, third fixed shaft; 23, bushing. Detailed Description of the Preferred Embodiments

[0034] In order to better understand the technical content of the present utility model, specific embodiments are provided below, and the present utility model will be further described in conjunction with the accompanying drawings.

[0035] It should be noted that the concepts such as "first" and "second" mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or mutual dependence relationship of the functions performed by these devices, modules or units.

[0036] Refer to Figures 1 to 3 , a support structure for reducing the load on the hinge 2 of a civil air defense door, mainly used for the door leaf 3 hinged and installed on a wall or door frame through the hinge 2, and this support structure includes a sliding sleeve 4 detachably installed on the door leaf 3.

[0037] Preferably, the sliding sleeve 4 is installed on the door leaf 3 by screwing.

[0038] Preferably, the sliding sleeve 4 is installed at a place close to the edge of the door leaf 3 and far from the hinge 2, and at the same time, the bottom of the sliding sleeve 4 is as close to the ground 1 as possible while ensuring that the support plate 8 is fully retracted.

[0039] A vertically arranged chute 5 is provided in the sliding sleeve 4, and an upper sliding rod 9 and a lower sliding rod 7 are slidably inserted through the chute 5. The bottom of the upper sliding rod 9 and the bottom of the lower sliding rod 7 are fixedly connected by a cable, and a spring 6 sleeved outside the cable is further provided in the chute 5 between the upper sliding rod 9 and the lower sliding rod 7.

[0040] The bottom of the lower sliding rod 7 is welded or screwed with a support plate 8.

[0041] A rack 10 is provided on the side wall of the upper sliding rod 9.

[0042] A first fixed shaft 12 is welded or screwed on the door leaf 3, and a first gear 11 is rotatably sleeved and installed on the first fixed shaft 12. The first gear 11 meshes with the first rack 10.

[0043] A third fixed shaft 22 is welded or screwed on the door leaf 3, a bushing 23 is rotatably sleeved and installed on the third fixed shaft 22, a second gear 13 and a worm gear 14 are fixedly sleeved on the bushing 23, an external nut is further provided at the end of the third fixed shaft 22, and a limit block 15 for restricting the bushing 23 from disengaging is also screwed on the end of the third fixed shaft 22.

[0044] Wherein the second gear 13 meshes with the first gear 11, and the first gear 11 is larger than the second gear 13.

[0045] A mounting seat 17 is welded or screwed on the door leaf 3, a worm 16 is rotatably installed in the mounting seat 17, and the worm 16 meshes with the worm gear 14.

[0046] One end of the worm 16 is further fixedly provided with a third gear 18.

[0047] A second fixed shaft 20 is welded or screwed on the door leaf 3, a fourth gear 19 is rotatably installed on the second fixed shaft 20, the fourth gear 19 meshes with the third gear 18, and a hexagonal nut 21 is further provided on the central axis of the fourth gear 19.

[0048] Preferably, the third gear 18 and the fourth gear 19 are bevel gears.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A support structure for reducing the load on the hinge of a civil air defense door, characterized in that: It includes a sliding sleeve detachably installed on the door leaf. A vertically arranged sliding groove is formed in the sliding sleeve. An upper sliding rod and a lower sliding rod are slidably inserted through the sliding groove. The bottom of the upper sliding rod and the top of the lower sliding rod are fixedly connected by a cable. A spring sleeved outside the cable is further arranged in the sliding groove between the upper sliding rod and the lower sliding rod. A support plate is fixedly arranged at the bottom of the lower sliding rod. A rack is arranged on the side wall of the upper sliding rod. A first gear is rotatably installed on the door leaf. The first gear meshes with the first rack. A third fixed shaft is further fixedly arranged on the door leaf. A sleeve is rotatably sleeved on the third fixed shaft. A second gear and a worm gear are fixedly sleeved on the sleeve. The second gear meshes with the first gear. The first gear is larger than the second gear. A worm is further rotatably installed on the door leaf. The worm meshes with the worm gear. A third gear is fixedly arranged at one end of the worm. A fourth gear is further rotatably installed on the door leaf. The fourth gear meshes with the third gear. A hexagonal nut is further arranged on the central axis of the fourth gear.

2. The support structure for reducing the load of the hinge of the civil air defense door according to claim 1, characterized in that: A first fixed shaft is fixedly arranged on the door leaf. The first gear is rotatably sleeved on the first fixed shaft.

3. The support structure for reducing the load of the hinge of the civil air defense door according to claim 1, characterized in that: A second fixed shaft is fixedly arranged on the door leaf. The fourth gear is rotatably sleeved on the second fixed shaft.

4. A support structure for reducing the load on the hinge of a civil air defense door according to claim 1, characterized in that: A mounting seat is fixedly arranged on the door leaf. The worm is rotatably installed in the mounting seat.

5. A support structure for reducing the load on the hinge of a civil air defense door according to claim 1, characterized in that: The third gear and the fourth gear are bevel gears.

6. A support structure for reducing the load on the hinge of a civil air defense door according to claim 1, characterized in that: An external nut is further arranged at the end of the third fixed shaft. A limiting block for restricting the sleeve from disengaging is further screwed on the end of the third fixed shaft.

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