Steel structure civil air defense door

Abstract

The utility model discloses a steel structure civil air defense door which comprises a round door frame and a round door cover, a frame edge is arranged at the end, facing the round door cover, of the round door frame, an annular groove is formed in the inner side of the frame edge, a multi-leaf cam is rotationally connected to the end, facing the round door frame, of the round door cover, and locking assemblies are distributed on the periphery of the multi-leaf cam. The locking assembly comprises a guide sleeve extending in the radial direction of the round door cover, a guide column is slidably connected into the guide sleeve, one end of the guide column can be inserted into the annular groove, the other end of the guide column is rotationally connected with a guide wheel with the wheel face tightly attached to the multi-blade cam, and a limiting hole extending in the length direction of the guide sleeve is formed in the guide sleeve. A movable spring pin arranged on the guide column is connected into the limiting hole in a sliding mode, a fixed spring pin arranged on the guide sleeve is arranged at the end, facing the multi-blade cam, of the movable spring pin, and an extension spring is connected between the fixed spring pin and the movable spring pin. A driving assembly is further included. The civil air defense door has the advantages of being labor-saving in opening and closing and convenient to lock, and is complete in overall function and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of civil air defense equipment, and more specifically, to a steel structure civil air defense door. Background Art

[0002] Civil defense doors made of steel structures are large in size and heavy in weight. The locking mechanisms on the doors are mostly pure mechanical structures. In order to save effort in opening and closing the locking mechanisms, lever-type structures are often used for driving. However, due to the limitation of the door frame outline, the lever arm cannot be set too long, resulting in difficulty in opening and closing, and the overall effect is not good. Accordingly, the utility model proposes a steel structure civil defense door. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the above-mentioned prior art and to provide a steel structure civil air defense door which has the characteristics of being labor-saving to open and close and convenient to lock.

[0004] To solve the above technical problems, the purpose of the utility model is achieved as follows: a steel structure civil air defense door involved in the utility model comprises a round door frame and a round door cover hinged on the round door frame, the round door frame is provided with a frame edge close to the edge at one end facing the round door cover, and an annular groove is provided on the inner side of the frame edge, the round door cover is rotatably connected with a multi-leaf cam located in the center at one end facing the round door frame, and a locking assembly with the same number of leaves as the multi-leaf cam is arranged on the outer periphery of the multi-leaf cam, the locking assembly comprises a guide sleeve extending along the radial direction of the round door cover, a guide column is slidably connected in the guide sleeve, one end of the guide column can be inserted into the annular groove, and the other end is rotatably connected with a guide wheel with a wheel surface close to the wheel surface of the multi-leaf cam, a limiting hole extending along the length direction thereof is provided on the guide sleeve, and a movable spring pin arranged on the guide column is slidably connected in the limiting hole, and a fixed spring pin arranged on the guide sleeve is provided at one end of the movable spring pin facing the multi-leaf cam, and a tension spring is connected between the fixed spring pin and the movable spring pin; and a driving assembly for controlling the rotation of the multi-leaf cam is also included.

[0005] The utility model is further configured as follows: the driving assembly includes a driven gear coaxially arranged with the multi-leaf cam, the driven gear is fixed to the multi-leaf cam, the round door cover is rotatably connected to a driving gear meshing with the driven gear, and one end of the driving gear is transmission-connected to a hand wheel for controlling its rotation.

[0006] The utility model is further configured as follows: the multi-leaf cam is a four-leaf cam arranged at equal intervals and angles.

[0007] To sum up, the utility model has the following beneficial effects: the steel structure civil defense door involved in the utility model drives the driving gear to rotate by operating the hand wheel, and realizes the rotation of the multi-leaf cam through the driven gear transmission. The unequal diameter wheel surfaces on the multi-leaf cam push the guide column to extend out of the guide sleeve and insert it into the annular groove, thereby realizing the locking function between the round door frame and the round door cover, which saves effort in opening and closing, is convenient to lock, has complete overall functions, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0009] Figure 2 It is a partial structural schematic diagram of the utility model;

[0010] Figure 3 It is a schematic diagram of the structure of the drive assembly of the utility model;

[0011] Figure 4 It is a structural schematic diagram of the utility model for embodying the locking assembly. DETAILED DESCRIPTION

[0012] In order to enable those skilled in the art to better understand the technical solution of the utility model, the preferred implementation scheme of the utility model is described below in conjunction with specific embodiments, but it should be understood that these descriptions are only for further illustrating the features and advantages of the utility model, rather than limiting the patent requirements of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0013] The utility model is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0014] Example 1

[0015] See also Figures 1 to 4As shown, a steel structure civil air defense door involved in this embodiment comprises a round door frame 100 and a round door cover 200 hinged on the round door frame 100, the end of the round door frame 100 facing the round door cover 200 is provided with a frame edge 1 close to the edge, the inner side of the frame edge 1 is provided with an annular groove (not shown), the end of the round door cover facing the round door frame is rotatably connected with a multi-leaf cam 2 located in the center, the outer periphery of the multi-leaf cam 2 is provided with locking components with the same number of leaves as the multi-leaf cam 2, the locking components include a guide sleeve 3 extending along the radial direction of the round door cover 200, and a sliding connection is provided in the guide sleeve 3. A guide column 4 is connected, one end of which can be inserted into the annular groove, and the other end is rotatably connected to a guide wheel 5 whose wheel surface is close to the wheel surface of the multi-leaf cam 2. The guide sleeve 3 is provided with a limiting hole 6 extending along its length direction, and a movable spring pin 7 arranged on the guide column 4 is slidably connected in the limiting hole 6. The end of the movable spring pin 7 facing the multi-leaf cam 2 is provided with a fixed spring pin 8 arranged on the guide sleeve 3, and a tension spring 9 is connected between the fixed spring pin 8 and the movable spring pin 7; it also includes a driving component for controlling the rotation of the multi-leaf cam 2.

[0016] Furthermore, the driving assembly includes a driven gear 10 coaxially arranged with the multi-leaf cam 2, the driven gear 10 is fixed to the multi-leaf cam 2, and the round door cover 200 is rotatably connected to a driving gear 11 that meshes with the driven gear 10, and one end of the driving gear 11 is transmission-connected to a handwheel (not shown) for controlling its rotation.

[0017] Furthermore, the multi-leaf cam 2 is a four-leaf cam arranged at equal intervals and angles.

[0018] In this embodiment, first, the guide wheel 5 is located at the recessed position between the two leaves of the multi-leaf cam 2. At this time, the guide column 4 is retracted into the guide sleeve 3, and the end of the guide column 4 is not inserted into the annular groove, and the round door cover 200 can be opened relative to the round door frame 100. When the round door cover 200 needs to be closed, the round door cover 200 is closed first, and then the hand wheel is turned. The hand wheel drives the driving gear 11 to rotate, and the multi-leaf cam 2 is driven by the meshing driven gear 10, and the multi-leaf cam 2 follows and pushes the guide wheel 5 sideways until the guide wheel 5 is located at the convex leaf position of the multi-leaf cam 2. During this period, the guide wheel 5 carries the guide column 4 to make a linear motion until the end of the guide column 4 is inserted into the annular groove, and the tension spring 9 is stretched.

[0019] The tension spring 9 is provided to reset the guide column 4 and the guide wheel 5 thereon.

[0020] The steel structure civil air defense door involved in the utility model drives the driving gear to rotate by operating the hand wheel, and realizes the rotation of the multi-leaf cam through the driven gear transmission. The unequal diameter wheel surfaces on the multi-leaf cam push the guide column to extend out of the guide sleeve and insert into the annular groove, so as to realize the locking function between the round door frame and the round door cover. It is labor-saving to open and close, convenient to lock, with complete overall functions and strong practicality.

[0021] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationship are based on the orientation or positional relationship actually shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in combination with the embodiments and according to specific circumstances.

[0022] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A steel structure civil air defense door, comprising a round door frame and a round door cover hinged on the round door frame, characterized in that: The end of the circular door frame facing the circular door cover is provided with a frame edge close to the edge, and the inner side of the frame edge is provided with an annular groove, and the end of the circular door cover facing the circular door frame is rotatably connected with a multi-leaf cam located in the center, and the outer circumference of the multi-leaf cam is provided with locking components with the same number of leaves as the multi-leaf cam, and the locking component includes a guide sleeve extending along the radial direction of the circular door cover, and a guide column is slidably connected in the guide sleeve, one end of the guide column can be inserted into the annular groove, and the other end is rotatably connected with a guide wheel whose wheel surface is close to the wheel surface of the multi-leaf cam, and the guide sleeve is provided with a limiting hole extending along the length direction thereof, and a movable spring pin arranged on the guide column is slidably connected in the limiting hole, and a fixed spring pin arranged on the guide sleeve is provided at the end of the movable spring pin facing the multi-leaf cam, and a tension spring is connected between the fixed spring pin and the movable spring pin; it also includes a driving component for controlling the rotation of the multi-leaf cam.

2. The steel structure civil air defense door according to claim 1 is characterized in that: The driving assembly includes a driven gear coaxially arranged with the multi-leaf cam, the driven gear is fixed to the multi-leaf cam, a driving gear rotatably connected to the round door cover and meshing with the driven gear, and one end of the driving gear is transmission-connected to a handwheel for controlling its rotation.

3. The steel structure civil air defense door according to claim 1 or 2, characterized in that: The multi-leaf cam is a four-leaf cam arranged at equal intervals and angles.

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