Civil air defense door hand wheel structure

Abstract

The utility model discloses a civil air defense door hand wheel structure which comprises a door frame, a bearing seat is fixedly arranged on the side face of the door frame, a hand wheel mechanism capable of achieving lifting adjustment is arranged in the bearing seat, and a positioning mechanism used for achieving fixing after adjustment is arranged on the side face of the hand wheel mechanism. The hand wheel is simple in structure and reasonable in design, the height of the hand wheel can be adjusted through the arrangement of the inner sleeve and the outer sleeve, operators of different heights can be helped to conveniently use the hand wheel, the universality and the human engineering of the mechanism are improved, the positions of the transmission rod and the inner sleeve can be fixed through the arrangement of the connecting rod, and the operation is convenient. The main bevel gear and the auxiliary bevel gear are engaged constantly, the stability of mechanism operation is guaranteed, the effect of automatic positioning can be achieved by arranging the lower chamfering plate and the upper chamfering plate, an operator can keep the position of the hand wheel fixed constantly in the hand wheel rotating process, and the practicability of the whole structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of civil air defense equipment, in particular to a hand wheel structure for a civil air defense door. Background Art

[0002] As an important facility specially used for personnel protection, the design and construction of civil air defense doors occupy a vital position in the field of modern building safety. Civil air defense doors are usually installed in military facilities, subway stations, underground projects and important civil buildings to provide effective protection in emergency situations such as air raids, chemical leaks or other disasters. The design requirements of civil air defense doors are extremely strict. They must have excellent sealing performance, sufficient strength and chemical corrosion resistance to resist external explosion impact, fire and harmful substances. In addition, civil air defense doors are often made of heavy materials such as steel to ensure durability and protection under extreme conditions. In terms of structure, civil air defense doors include door body, locking mechanism, sealing system and other components, each of which must meet strict safety standards.

[0003] Deficiencies of existing technology:

[0004] In the existing design of the handwheel for civil air defense doors, there is a problem of adaptability to users of different heights due to the fixed height of the handwheel. For taller users, the handwheel may be set too low, causing them to bend over or stoop to operate, which not only affects the operating efficiency, but may also cause back discomfort or fatigue. On the contrary, shorter users may find it difficult to hold the handwheel comfortably, which may cause operational delays in emergency situations. Therefore, improving the handwheel structure to adapt to users of different heights, especially providing a height adjustment mechanism, has become the key to improving the operating efficiency and safety of civil air defense doors. Such improvements not only improve the convenience of operation, but also protect the health of the operator, which is particularly important in emergency situations that require quick and accurate operation. Utility Model Content

[0005] The purpose of the utility model is to provide a hand wheel structure for a civil air defense door to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hand wheel structure for a civil air defense door, comprising a door frame, a bearing seat is fixedly arranged on the side of the door frame, a hand wheel mechanism capable of adjusting the lifting and lowering is arranged inside the bearing seat, and a positioning mechanism for fixing after adjustment is arranged on the side of the hand wheel mechanism;

[0007] The handwheel mechanism comprises:

[0008] An outer sleeve, the outer sleeve is rotatably arranged inside the bearing seat, and a transmission bevel gear is arranged on the upper end of the outer sleeve;

[0009] An inner sleeve, wherein the inner sleeve is slidably arranged on the inner side of the outer sleeve, the inner sleeve has a polygonal cross section and is adapted to the inner shape of the outer sleeve to realize the function of mutual driving between the inner sleeve and the outer sleeve, and a secondary bevel gear is arranged at the lower end of the inner sleeve;

[0010] A hand wheel, the hand wheel is arranged on the side of the door frame, the side of the hand wheel is connected with a transmission rod, the other end of the transmission rod is provided with a main bevel gear, and the main bevel gear is meshed and connected with the auxiliary bevel gear;

[0011] A connecting rod, the interior of which is rotatably connected to the outer wall of the inner sleeve through a bearing, and the other end of the connecting rod is connected to a positioning mechanism.

[0012] Preferably, the positioning mechanism comprises:

[0013] A positioning body, wherein the interior of the positioning body is rotatably connected to the transmission rod through a bearing member, the outer wall of the positioning body is connected to the connecting rod, the two sides of the interior of the positioning body are slidably connected to the lower chamfered plate through a sliding groove, and a first spring is provided between the positioning body and the lower chamfered plate;

[0014] The positioning member frame is arranged on the door frame, and the two sides inside the positioning member frame are slidably connected with upper chamfered plates through sliding grooves, a second spring is arranged between the upper chamfered plate and the door frame, and the positioning body is movably arranged inside the positioning member frame.

[0015] Preferably, a guide column is slidably connected to the inner side of the positioning body through a guide hole, and the upper and lower ends of the guide column are connected to the positioning member frame.

[0016] Preferably, the gear ratio between the main bevel gear and the transmission bevel gear is 1:2.

[0017] Preferably, a gripping rod is fixedly connected to the side wall of the lower chamfered plate, and the gripping rod is used to tighten the lower chamfered plate.

[0018] Preferably, the length of the gripping rod is greater than the thickness of the positioning member frame.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The handwheel structure of a civil air defense door is provided with a handwheel mechanism, which includes an outer sleeve, a transmission bevel gear, an inner sleeve, a secondary bevel gear, a handwheel, a transmission rod, a main bevel gear, and a connecting rod. The inner and outer sleeves are provided so that the handwheel can be adjusted in height, which helps operators of different heights to use the handwheel conveniently, thereby improving the versatility and ergonomics of the mechanism. The connecting rod can be provided to fix the positions of the transmission rod and the inner sleeve, so that the main bevel gear and the secondary bevel gear are always in meshing, thereby ensuring the stability of the mechanism operation.

[0021] This kind of civil air defense door handwheel structure is provided with a positioning mechanism, and the positioning mechanism includes a positioning body, a lower chamfered plate, a first spring, a positioning member frame, an upper chamfered plate, and a second spring. By providing the lower chamfered plate and the upper chamfered plate, the effect of automatic positioning can be achieved, so that the operator can always keep the handwheel position fixed during the rotation of the handwheel, thereby improving its practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the positioning body of the utility model;

[0024] Figure 3 This is a schematic diagram of the internal structure of the positioning body of the utility model;

[0025] Figure 4 It is a top view of the inner and outer sleeves of the utility model;

[0026] Figure 5 This is a schematic diagram of the internal structure of the positioning member frame of the utility model.

[0027] In the figure: 1. door frame; 2. bearing seat; 3. handwheel mechanism; 301. outer sleeve; 302. transmission bevel gear; 303. inner sleeve; 304. secondary bevel gear; 305. handwheel; 306. transmission rod; 307. main bevel gear; 308. connecting rod; 4. positioning mechanism; 401. positioning body; 402. lower chamfered plate; 403. first spring; 404. positioning member frame; 405. upper chamfered plate; 406. second spring; 5. guide column; 6. gripping rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "setting" should be understood in a broad sense, for example, it can be fixed connection, setting, or detachable connection, setting, or integrated connection, setting. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "several" is two or more, unless otherwise clearly and specifically defined. Example

[0032] See also Figure 1-5 As shown, the utility model provides a technical solution for a handwheel structure of a civil air defense door: a handwheel structure of a civil air defense door, comprising a door frame 1, a bearing seat 2 is fixedly arranged on the side of the door frame 1, a handwheel mechanism 3 capable of adjusting the lifting and lowering is arranged inside the bearing seat 2, and a positioning mechanism 4 for fixing after adjustment is arranged on the side of the handwheel mechanism 3;

[0033] The handwheel mechanism 3 includes an outer sleeve 301, an inner sleeve 303, a handwheel 305, and a connecting rod 308. The outer sleeve 301 is rotatably connected to the inside of the bearing seat 2. The upper end of the outer sleeve 301 is provided with a transmission bevel gear 302. The inner sleeve 303 is slidably connected to the inner side of the outer sleeve 301. The cross-section of the inner sleeve 303 is polygonal and is adapted to the internal shape of the outer sleeve 301 to achieve the function of mutual driving between the inner sleeve 303 and the outer sleeve 301. The lower end of the inner sleeve 303 is connected to a secondary bevel gear 304. The handwheel 305 is located on the side of the door frame 1. The side of the handwheel 305 is connected to a transmission rod 306. The other end of the transmission rod 306 is connected to a main bevel gear 307, and the main bevel gear 307 is meshed with the secondary bevel gear 304. The interior of the connecting rod 308 is rotatably connected to the outer wall of the inner sleeve 303 through a bearing, and the other end of the connecting rod 308 is connected to the positioning mechanism 4. When the height of the handwheel 305 needs to be adjusted, the operator needs to push up the handwheel 305. During this process, the handwheel 305, the transmission rod 306, the main bevel gear 307, the secondary bevel gear 304, the inner sleeve 303, and the connecting rod 308 will all move upward. After stopping the upward movement, the positioning mechanism 4 will limit the downward movement of the handwheel 305, wherein part of the inner sleeve 303 will retract into the interior of the outer sleeve 301, and the main bevel gear 307 and the secondary bevel gear 304 will remain engaged under the restriction of the connecting rod 308, thereby ensuring the rotation of the handwheel 305 and the power output to the unlocking mechanism of the civil defense door.

[0034] The positioning mechanism 4 includes a positioning body 401 and a positioning member frame 404. The interior of the positioning body 401 is rotatably connected to the transmission rod 306 through a bearing member. The outer wall of the positioning body 401 is connected to the connecting rod 308. The two sides of the interior of the positioning body 401 are slidably connected with the lower chamfered plate 402 through a sliding groove. A first spring 403 is installed between the positioning body 401 and the lower chamfered plate 402. The positioning member frame 404 is fixed to the door frame 1. The two sides of the interior of the positioning member frame 404 are slidably connected with the upper chamfered plate 405 through a sliding groove. A second spring 406 is installed between the upper chamfered plate 405 and the door frame 1. The positioning body 401 is movably arranged in the interior of the positioning member frame 404. It should be noted that blocks must be provided in the internal slide grooves of the positioning body 401 and the internal slide grooves of the positioning member frame 404 to prevent the upper and lower chamfered plates 402 from being pushed out by the springs. In addition, the elastic force of the first spring 403 should be greater than the elastic force of the second spring 406 to avoid the lower chamfered plate 402 being pushed into the positioning body 401 at all times. When the position of the handwheel 305 is adjusted, the positioning body 401 moves upward, and the lower chamfered plates 402 squeeze the upper chamfered plates 405 on both sides, causing the upper chamfered plates 405 to retract. When the handwheel 305 is adjusted to a suitable position, the lower end surface of the lower chamfered plate 402 is against the upper end surface of the upper chamfered plate 405. At this time, the positioning body 401 will be restricted from falling, thereby achieving a positioning effect.

[0035] A guide column 5 is slidably connected to the inner side of the positioning body 401 through a guide hole. The upper and lower ends of the guide column 5 are connected to the positioning member frame 404. The guide column 5 can provide guidance for the movement of the positioning body 401, ensure the smooth movement of the hand wheel 305, and reduce friction.

[0036] The gear ratio of the main bevel gear 307 to the transmission bevel gear 302 is 1:2. By designing the gear ratio of the main bevel gear 307 to the transmission bevel gear 302 to be 1:2, the torque can be increased, thereby improving the rotation efficiency of the hand wheel 305.

[0037] A gripping rod 6 is fixedly connected to the side wall of the lower chamfered plate 402, and the gripping rod 6 is used to tighten the lower chamfered plate 402. The provision of the gripping rod 6 can help an operator to tighten the lower chamfered plate 402 more easily, thereby achieving a quick release effect.

[0038] The length of the handle 6 is greater than the thickness of the positioning member frame 404. By designing the length of the handle 6 to be greater than the thickness of the positioning member frame 404, it can be ensured that the end of the handle 6 is always outside the positioning member frame 404, which is more convenient for the operator to perform the release operation.

[0039] The working principle of the utility model is as follows:

[0040] When the handwheel 305 is adjusted upward, the positioning body 401 moves upward. At this time, the lower chamfered plate 402 will squeeze the upper chamfered plates 405 on both sides, causing the upper chamfered plates 405 to retract. When the handwheel 305 is adjusted to a suitable position, the lower end surface of the lower chamfered plate 402 will abut against the upper end surface of the upper chamfered plate 405. At this time, the positioning body 401 will be restricted and unable to fall, thereby achieving a fixing effect; the handwheel structure of the civil defense door improves operability and practicality by integrating the handwheel mechanism 3 and the positioning mechanism 4. Its design allows the handwheel 305 to be adjusted in height to accommodate operators of different heights, while ensuring that the main bevel gear 307 and the secondary bevel gear 304 are always engaged, thereby ensuring the stability of the mechanism operation. In addition, the positioning mechanism 4 realizes automatic positioning of the handwheel 305, so that the operator can keep the handwheel position fixed during the rotation of the handwheel 305, further improving the practicality of the handwheel structure and the ergonomics of operation.

[0041] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A hand wheel structure for a civil air defense door, comprising a door frame (1), characterized in that: A bearing seat (2) is fixedly provided on the side of the door frame (1); a hand wheel mechanism (3) capable of adjusting the lifting and lowering is provided inside the bearing seat (2); and a positioning mechanism (4) for achieving fixation after adjustment is provided on the side of the hand wheel mechanism (3); The handwheel mechanism (3) comprises: An outer sleeve (301), the outer sleeve (301) being rotatably disposed inside the bearing seat (2), and a transmission bevel gear (302) being disposed at an upper end of the outer sleeve (301); An inner sleeve (303), the inner sleeve (303) being slidably disposed on the inner side of the outer sleeve (301), the inner sleeve (303) having a polygonal cross section and being adapted to the inner shape of the outer sleeve (301) so as to realize a mutual driving function between the inner sleeve (303) and the outer sleeve (301), and a secondary bevel gear (304) being disposed at the lower end of the inner sleeve (303); A hand wheel (305), the hand wheel (305) being arranged on a side of the door frame (1), the side of the hand wheel (305) being connected to a transmission rod (306), the other end of the transmission rod (306) being provided with a main bevel gear (307), the main bevel gear (307) being meshed and connected with the auxiliary bevel gear (304); A connecting rod (308), the interior of the connecting rod (308) is rotatably connected to the outer wall of the inner sleeve (303) via a bearing, and the other end of the connecting rod (308) is connected to the positioning mechanism (4).

2. The hand wheel structure for a civil air defense door according to claim 1, characterized in that: The positioning mechanism (4) comprises: A positioning body (401), wherein the interior of the positioning body (401) is rotatably connected to the transmission rod (306) via a bearing member, an outer wall of the positioning body (401) is connected to the connecting rod (308), both sides of the interior of the positioning body (401) are slidably connected to lower chamfered plates (402) via sliding grooves, and a first spring (403) is provided between the positioning body (401) and the lower chamfered plates (402); A positioning member frame (404), the positioning member frame (404) being arranged on the door frame (1), upper chamfered plates (405) being slidably connected to the two sides of the positioning member frame (404) via sliding grooves, a second spring (406) being arranged between the upper chamfered plates (405) and the door frame (1), and the positioning body (401) being movably arranged inside the positioning member frame (404).

3. The hand wheel structure for a civil air defense door according to claim 2, characterized in that: A guide post (5) is slidably connected to the inner side of the positioning body (401) via a guide hole, and the upper and lower ends of the guide post (5) are connected to the positioning member frame (404).

4. The hand wheel structure for a civil air defense door according to claim 1, characterized in that: The gear ratio between the main bevel gear (307) and the transmission bevel gear (302) is 1:

2.

5. The hand wheel structure for a civil air defense door according to claim 2, characterized in that: A gripping rod (6) is fixedly connected to the side wall of the lower chamfered plate (402), and the gripping rod (6) is used to tighten the lower chamfered plate (402).

6. The hand wheel structure for a civil air defense door according to claim 5, characterized in that: The length of the gripping rod (6) is greater than the thickness of the positioning member frame (404).

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