Lifting type civil air defense door and lifting type space cam hinge mechanism thereof

Abstract

The utility model discloses a lift type civil air defense door and a lift type space cam hinge mechanism thereof, the lift type space cam hinge mechanism comprises a hinge base, a door leaf embedded part, a ball screw, a ball, a screw nut and a positioning screw, the upper end and the lower end of the ball screw are fixed on the hinge base, the ball is arranged at the end part of the positioning screw, and the screw nut is fixed on the door leaf embedded part. The lifting type civil air defense door comprises a door leaf embedded part, a ball screw and a positioning screw, the ball screw is provided with a vertical spiral groove, the ball is in sliding fit with the vertical spiral groove in the ball screw, the positioning screw is fixed to a lead screw nut, the ball screw is sleeved with the lead screw nut and can rotate, the lead screw nut and the door leaf embedded part are fixedly installed, and the positioning screw and the lead screw nut are fixedly installed. The lifting type civil air defense door comprises a door frame and a door leaf, the door leaf and the door frame are connected through the lifting type space cam hinge mechanism, the lifting type space cam hinge mechanism of the lifting type civil air defense door enables the door leaf to ascend or descend in the opening and closing process, and friction between the bottom edge of the door leaf and the ground can be effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of civil defense door technology, specifically a lifting civil defense door and its lifting space cam hinge mechanism. Background Technology

[0002] The "General Technical Requirements for Civil Air Defense Equipment (Protective Doors)" categorizes threshold types into three types: thresholdless, fixed, and movable. It specifies that "the final surface of the threshold of thresholdless protective equipment should be flush with the final floor surface of the building." Traditional steel-structured thresholdless protective airtight doors, such as... Figure 1 As shown, a flip beam mechanism is added to the inside of the door leaf. When the door leaf is closed, the flip beam is pressed down and pressed against the bottom sill of the door frame by a secondary operation of the handle to achieve the sealing function. This mechanism has a complex structure, high manufacturing cost, and is cumbersome and inefficient to install. Utility Model Content

[0003] The purpose of this utility model is to provide a lifting-type air defense door and its lifting-type spatial cam hinge mechanism to solve the problems mentioned in the background art, such as the complex structure and high manufacturing cost of existing air defense doors in order to achieve the function of sealing the bottom sill of the door frame and the door leaf.

[0004] To achieve the above objectives, this utility model provides a lifting spatial cam hinge mechanism, which includes a hinge base, a door leaf embedded part, a ball screw, balls, a screw nut, and a positioning screw. The upper and lower ends of the ball screw are fixed on the hinge base, the balls are disposed at the end of the positioning screw, the balls slide in contact with the vertical helical groove on the ball screw, the positioning screw is fixed on the screw nut, the screw nut is sleeved on the ball screw and can rotate, the screw nut and the door leaf embedded part are fixedly installed, and the positioning screw is fixedly installed on the screw nut.

[0005] The hinge base includes a side mounting plate, an upper mounting plate, and a lower mounting plate. The upper and lower mounting plates are fixed to the upper and lower sides of the side mounting plate, respectively. The top end of the ball screw is fixed to the upper mounting plate, and the bottom end of the ball screw is fixed to the lower mounting plate.

[0006] The inner wall of the lead screw nut is provided with a threaded mounting hole, and the positioning screw is threadedly engaged with the threaded mounting hole.

[0007] This utility model also provides a lifting-type air defense door, including the above-mentioned lifting-type spatial cam hinge mechanism. The lifting-type air defense door includes a door frame and a door leaf. The door leaf and the door frame are connected by the above-mentioned lifting-type spatial cam hinge mechanism. The hinge base of the lifting-type spatial cam hinge mechanism is fixed on the door frame, and the door leaf embedded part of the lifting-type spatial cam hinge mechanism is fixed on the door leaf.

[0008] The lifting space cam hinge mechanism is located on the upper and lower sides of the door edge.

[0009] The side mounting plate of the hinge base is fixedly installed to the door frame.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This utility model utilizes a lifting-type spatial cam hinge mechanism and a lifting-type air-raid shelter door employing this mechanism. When the door is opened, the opening action of the door leaf generates a certain torque on the lifting-type spatial cam hinge mechanism. Driven by this torque, the mechanism rises, preventing friction between the bottom edge of the door leaf and the ground, thus ensuring smooth opening. When closing, the above actions are reversed, causing the door leaf to lower and shift its angle, achieving the closing action. This lifting-type spatial cam hinge mechanism cleverly utilizes a specific helical lead to control the opening and closing angle and lifting distance of the door leaf. The process is simple and installation is convenient, showing promising market application prospects. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the existing technology of civil defense door structure;

[0013] Figure 2 A schematic diagram of the lifting space cam hinge mechanism provided by this utility model;

[0014] Figure 3 This is a structural schematic diagram of the lifting-type air defense door provided by this utility model;

[0015] Figure 4 This is a schematic diagram of the lifting space cam hinge mechanism of the present invention when the door leaf is in the open state;

[0016] Figure 5 This is a schematic diagram of the lifting space cam hinge mechanism of this utility model when the door is closed.

[0017] In the diagram: 1. Door frame; 2. Door leaf; 3. Hinge base; 4. Door leaf embedded part; 5. Ball screw; 6. Screw nut; 7. Positioning screw; 8. Vertical spiral groove slide; 9. Side mounting plate; 3-1. Upper mounting plate; 3-2. Lower mounting plate; 3-3. Threaded mounting hole; 10. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 2 This utility model provides a lifting spatial cam hinge mechanism, which is used to install between the door frame 1 and the door leaf 2 of a civil defense door. The lifting spatial cam hinge mechanism includes a hinge base 3, a door leaf embedded part 4, a ball screw 5, balls 6, a screw nut 7, and a positioning screw 8. The balls 6 are located at the end of the positioning screw 8 and slide 9 into the vertical helical groove on the ball screw 5. The positioning screw 8 restricts the balls 6 within the vertical helical groove, and the helical direction of the vertical helical groove is along the axial direction of the ball screw 5. The positioning screw 8 is fixed to the screw nut 7, and the balls 6 can slide 9 along the vertical helical groove on the ball screw 5. The lead screw nut 7 is fitted onto the ball screw 5 and can rotate. Since the upper and lower ends of the ball screw 5 are fixed on the hinge base 3, the ball screw 5 remains stationary. When the lead screw nut 7 is rotated, the positioning screw 8 on the lead screw nut 7 rotates accordingly. The ball 6 at the top of the positioning screw 8 slides along the vertical spiral groove. Under the restriction of the vertical spiral groove, as the lead screw nut 7 rotates, the ball 6, positioning screw 8, and lead screw nut 7 move along the axial direction of the ball screw 5. When the ball screw 5 is set to the vertical direction, the ball 6, positioning screw 8, and lead screw nut 7 move up and down. The door leaf embedded part 4 is fixedly installed with the lead screw nut 7, and the door leaf embedded part 4 moves with the lead screw nut 7.

[0020] The hinge base 3 includes a side mounting plate 3-1, an upper mounting plate 3-2, and a lower mounting plate 3-3. The upper mounting plate 3-2 and the lower mounting plate 3-3 are respectively fixed on the upper and lower sides of the side mounting plate 3-1. The side mounting plate 3-1 is the mounting structure between the hinge base 3 and the outside. The top end of the ball screw 5 is fixed on the upper mounting plate 3-2, and the bottom end of the ball screw 5 is fixed on the lower mounting plate 3-3. The ball screw 5 is fixed on the hinge base 3 by the upper mounting plate 3-2 and the lower mounting plate 3-3.

[0021] A threaded mounting hole 10 is provided on the inner wall of the lead screw nut 7. The positioning screw 8 is threadedly engaged with the threaded mounting hole 10. The ball 6 is rotatably mounted on the end of the positioning screw 8. The ball 6 is pushed into the vertical spiral groove by turning the positioning screw 8.

[0022] The lifting space cam hinge mechanism provided by this utility model can achieve the axial movement of the door leaf embedded part 4 along the ball screw 5 on the hinge base 3 by rotating between the hinge base 3 and the door leaf embedded part 4. The hinge base 3 is fixed on the door frame 1, and the door leaf embedded part 4 is fixed on the door leaf 2. The door leaf 2 can be moved up and down along the ball screw 5 axis by opening and closing the door leaf 2.

[0023] like Figure 3As shown, this utility model also provides a lifting-type air defense door, including the above-mentioned lifting-type spatial cam hinge mechanism. The lifting-type air defense door includes a door frame 1 and a door leaf 2. The door leaf 2 and the door frame 1 are connected by the above-mentioned lifting-type spatial cam hinge mechanism. The hinge base 3 of the lifting-type spatial cam hinge mechanism is fixed on the door frame 1, and the door leaf embedded part 4 of the lifting-type spatial cam hinge mechanism is fixed on the door leaf 2. In order to improve the installation stability of the door leaf 2, two or more lifting-type spatial cam hinge mechanisms are provided, and multiple sets of lifting-type spatial cam hinge mechanisms are provided on the upper and lower sides of the edge of the door leaf 2.

[0024] The side mounting plate 3-1 of the hinge base 3 is fixedly installed with the door frame 1. The hinge base 3 is fixed to one side of the door frame 1 through the side mounting plate 3-1, thereby connecting the door frame 1 and the door leaf 2.

[0025] like Figure 4 As shown, the door leaf 2 is in the open state: During the opening process of the door leaf 2, the door leaf 2 is rotated outward by the door handle, etc. The door leaf embedded part 4 fixedly installed with the door leaf 2, as well as the screw nut 7 and positioning screw 8 on the door leaf embedded part 4, all rotate around the ball screw 5. At this time, the ball 6 slides upward along the vertical spiral groove under the drive of the positioning screw 8. The screw nut 7 is lifted from the initial state to a specific distance through the spiral helix angle generated by the ball 6 and the ball screw 5, thereby realizing the opening action of the door leaf 2 and lifting the door leaf 2 upward.

[0026] like Figure 5 As shown, in the closed state of door leaf 2: During the closing process of door leaf 2, the door leaf 2 is rotated inward to the door frame 1 by means of the door handle, etc. The door leaf embedded part 4 fixedly installed with the door leaf 2 and the screw nut 7 and positioning screw 8 on the door leaf embedded part 4 all rotate around the ball screw 5. At this time, the ball 6 slides down along the vertical spiral groove under the drive of the positioning screw 8. The screw nut 7 is reduced from the initial state to a specific distance through the spiral drop angle generated by the ball 6 and the ball screw 5, so as to realize the closing action of door leaf 2 and lower the door leaf 2 downward, so that the bottom of the door leaf 2 is closed with the door frame 1.

[0027] The pitch of the vertical spiral groove on the ball screw 5 is determined according to the opening and closing height requirements of the door leaf 2. The screw nut 7 and the door leaf 2 hinge embedded parts are assembled into a single mechanism. During the rotation and lifting of the screw nut 7, the door leaf 2 is driven to open and rise or close and fall.

[0028] The relevant parameters for ball screw 5 and screw nut 7 are set as follows:

[0029]

[0030] In the above formula:

[0031] T: Door opening torque, unit: Nm;

[0032] F: Weight of door leaf 2, unit: N;

[0033] S: Lead screw pitch, unit: m.

[0034] The above formula can be used to calculate the applicable ball screw parameters for different models of door leaf 2.

[0035] This utility model achieves rapid opening, closing, and sealing of air defense doors through a lifting space cam hinge mechanism, facilitating peacetime-wartime conversion, optimizing cost structure, and possessing outstanding economic value, making it worthy of rapid promotion and application.

[0036] This patent also applies to double-leaf air defense doors, where the same lifting space cam hinge mechanism is symmetrically arranged on the double-leaf doors to achieve simultaneous opening, closing, lifting, and lowering of the double-leaf air defense doors.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting spatial cam hinge mechanism, characterized in that: The lifting space cam hinge mechanism includes a hinge base, a door leaf embedded part, a ball screw, balls, a screw nut, and a positioning screw. The upper and lower ends of the ball screw are fixed on the hinge base. The balls are located at the ends of the positioning screws. The balls slide in contact with the vertical helical grooves on the ball screw. The positioning screw is fixed on the screw nut. The screw nut is sleeved on the ball screw and can rotate. The screw nut and the door leaf embedded part are fixedly installed. The positioning screw is fixedly installed on the screw nut.

2. The lifting spatial cam hinge mechanism according to claim 1, characterized in that: The hinge base includes a side mounting plate, an upper mounting plate, and a lower mounting plate. The upper and lower mounting plates are fixed to the upper and lower sides of the side mounting plate, respectively. The top end of the ball screw is fixed to the upper mounting plate, and the bottom end of the ball screw is fixed to the lower mounting plate.

3. The lifting spatial cam hinge mechanism according to claim 1, characterized in that: The inner wall of the lead screw nut is provided with a threaded mounting hole, and the positioning screw is threadedly engaged with the threaded mounting hole.

4. A lifting-type air defense door, comprising the lifting-type spatial cam hinge mechanism as described in any one of claims 1-3, characterized in that: The lifting-type air defense door includes a door frame and a door leaf. The door leaf and the door frame are connected by the aforementioned lifting-type spatial cam hinge mechanism. The hinge base of the lifting-type spatial cam hinge mechanism is fixed on the door frame, and the door leaf embedded part of the lifting-type spatial cam hinge mechanism is fixed on the door leaf.

5. A lifting-type air-raid shelter door according to claim 4, characterized in that: The lifting space cam hinge mechanism is located on the upper and lower sides of the door edge.

6. A lifting-type air-raid shelter door according to claim 4, characterized in that: The side mounting plate of the hinge base is fixedly installed to the door frame.

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