CN219101053U

CN219101053U - Door spindle structure and civil air defense door equipment

Info

Publication number: CN219101053U
Application number: CN202223434062.2U
Authority: CN
Inventors: 黄张军; 詹增泉; 孟淼勇; 应坚丰; 周浩; 阮洁
Original assignee: Shaoxing Jindun Defence Equipment Co ltd
Current assignee: Shaoxing Jindun Defence Equipment Co ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-05-30
Anticipated expiration: 2032-12-21

Abstract

The utility model relates to a door axle construction and people's air defense door equipment has set up the door axle construction through having set up the basis of pivot structure in one side of people's air defense door, has set up hydraulic means through in the door axle construction, and the inside slide bar of hydraulic means sets up to can be in under the pressure effect slip in the cavity, and can stretch out the cylinder body, promote with slide bar fixed connection's universal wheel contact ground in order to form the support for the door axle construction is whole with the holding power that can accept ground to the people's air defense door, has increased the bearing site through the door axle system on the basis of the bearing site that original pivot structure provided, is favorable to preventing the deformation of pivot structure.

Description

Door spindle structure and civil air defense door equipment

Technical Field

The application relates to the field of civil air defense engineering, in particular to a door shaft structure and civil air defense door equipment.

Background

In modern civil air defense engineering, three-proofing engineering (chemical weapon, nuclear weapon and biological weapon) takes up important position, wherein the most applied nuclear weapon engineering is civil air defense door and civil air defense wall, and the attack of nuclear weapon is faced, and both civil air defense door and civil air defense wall are relatively thick and heavy.

The traditional scheme generally comprises two kinds of people's air defense door equipment of a sliding rail type and a rotating shaft type.

According to fig. 1 and 2, the sliding rail type civil air defense door is provided with a cavity in the civil air defense wall, the cavity is used for accommodating the civil air defense door, when the door needs to be closed, the civil air defense door is moved out of the cavity, and when the door needs to be opened, the civil air defense door is moved into the cavity. However, when the sliding rail type civil air defense door is designed, the civil air defense wall has a cavity, so that the integral structure of the civil air defense wall can be damaged, the thickness of the civil air defense wall is reduced, and the anti-collision capability of the civil air defense wall is reduced.

The rotary shaft type civil air defense door shown in fig. 3 is more commonly used relative to the sliding rail type civil air defense door, and the door opening and the door closing are realized by arranging a rotary shaft structure between the civil air defense door and the civil air defense wall. However, because the overall mass of the civil air defense door is large, the bearing structure of the rotating shaft structure is deformed due to the stress of the single side, so that the situation that the civil air defense door is difficult to open and close occurs.

Therefore, there is a need for a civil air defense door apparatus capable of preventing deformation of the rotation shaft structure without changing the structure of the civil air defense wall itself.

Disclosure of Invention

For solving the technical problem mentioned in the background section above, some embodiments of the present application provide a door axle structure, be applied to a people's air defense door equipment, people's air defense door equipment includes pivot structure and people's air defense door, people's air defense door include the door frame with inlay the door body in the door frame, pivot structure set up in one side of people's air defense door, pivot structure connects the door frame with the door body, so that the door frame with the door body rotates to be connected, its characterized in that, door axle structure set up in the opposite side of people's air defense door, just door axle structure fixed connection in the door body, door axle structure includes:

the connecting piece is fixedly connected to the door body;

the hydraulic device is fixedly connected with the connecting piece; the hydraulic device comprises a cylinder body and a sliding rod, a cavity is formed in the cylinder body, and an opening is formed in one end, close to the ground, of the cylinder body; the sliding rod is arranged in the cavity, can slide in the cavity under the action of pressure and can extend out of the cylinder body;

the universal wheel is fixedly connected with the sliding rod;

when the door shaft structure enters a working state, a sliding rod in the hydraulic device stretches out of the cylinder body under the action of pressure and pushes the universal wheels to contact the ground so as to form a support.

Further, the hydraulic device further includes:

the first baffle plate is arranged in the cavity in a sliding way; the first partition plate is arranged far away from the ground;

the second baffle is arranged in the cavity and is parallel to the first baffle, and the second baffle is fixedly connected with the inner wall of the cylinder body; the second partition board is arranged close to the ground;

the first partition plate and the second partition plate divide the cavity into a first cavity, a second cavity and a third cavity; the first cavity is an accommodating space formed between the top surface of the cylinder body and the first partition plate; the second cavity is an accommodating space formed between the first partition plate and the second partition plate, the third cavity is an accommodating space formed between the second partition plate and the bottom surface of the cylinder body, and the sliding rod is arranged in the third cavity in a sliding mode.

Further, the cylinder body is provided with first through-hole, the door-hinge structure still includes pressurizing mechanism, pressurizing mechanism includes:

the pressurizing block is fixedly connected with the first partition plate; the pressurizing block comprises a tooth surface, and the tooth surface is provided with a plurality of racks;

one end of the rotating shaft extends into the cylinder body through the first through hole, and the other end extends out of the cylinder body;

the poking rod is sleeved at one end of the rotating shaft extending out of the cylinder body.

Further, a gear is arranged on the outer surface of one end of the rotating shaft extending into the cylinder body; the gear is used for being meshed with the rack, so that when the poking rod is poked, the pressurizing block drives the first partition plate to move towards the direction close to the second partition plate.

Further, the pressurizing mechanism further includes:

the unidirectional bearing comprises an inner ring piece and an outer ring piece;

the outer edge of the inner ring piece is provided with a plurality of first meshing teeth, and the inner edge of the inner ring piece is fixedly connected with the rotating shaft;

the inner edge of the outer ring piece is provided with a plurality of second meshing teeth, and the outer edge of the outer ring piece is fixedly connected to the hole wall of the first through hole;

when the movement trend of the sliding rod extends out of the cylinder body, the outer ring piece is nested outside the inner ring piece, and the first meshing teeth and the second meshing teeth are mutually clamped so as to enable the rotating shaft to rotate unidirectionally; when the sliding rod tends to retract toward the cylinder body, the inner ring member is separated from the outer ring member, so that the rotating shaft is free to rotate.

Further, the pressurizing mechanism further includes:

and the support bearing is arranged between the rotating shaft and the first through hole and sleeved on the rotating shaft and is used for supporting the rotating shaft, so that the inner ring piece and the outer ring piece are separated and combined under the guidance of the rotating shaft.

Further, a second through hole is arranged above the second partition board; and a one-way valve in the direction from the second cavity to the third cavity is arranged at the second through hole.

Further, the runner is arranged on the cylinder body and is communicated with the second cavity and the third cavity;

two first flow passage openings are formed in two ends of the flow passage, the second partition plate is located between the two first flow passage openings, the first flow passage openings are tightly attached to the second partition plate, and the two first flow passage openings are formed in the inner wall of the cylinder body.

Further, the second runner opening is formed in one side, close to the outer wall of the cylinder body, of the runner; the second fluid passage opening is positioned between the two first fluid passage openings;

the third through hole is formed in the outer wall of the cylinder body and is communicated with the second channel opening;

and the inserting rod is used for blocking the flow passage when being inserted into the flow passage along the third through hole and the second flow passage opening.

The application also provides civil air defense door equipment, which comprises a door frame and a door body embedded in the door frame;

the rotating shaft structure is arranged at one side of the civil air defense door; the rotating shaft structure is connected with the door frame and the door body so as to enable the door frame to be rotationally connected with the door body; the door shaft structure is arranged on the other side of the civil air defense door and is fixedly connected with the door body.

The application relates to a door spindle structure and civil air defense door equipment.

Through having set up the basis of pivot structure in one side of people's air defense door, having set up the door axle structure in the opposite side of people's air defense door, through having set up hydraulic means in the door axle structure, the inside slide bar of hydraulic means sets up to can be in under the pressure effect slip in the cavity, and can stretch out the cylinder body, promote the universal wheel contact ground with slide bar fixed connection in order to form the support for the door axle structure is whole with the holding power that can accept ground to people's air defense door, has increased the bearing site through the door axle system on the basis of the bearing site that original pivot structure provided, is favorable to preventing the deformation of pivot structure.

Reference numerals:

a-a civil air defense door; b-a cavity; c-a civil air defense wall; d-a rotating shaft structure; e-door frame; f-door spindle structure;

100-connecting piece; 200-hydraulic means; 210-a first separator; 220-a second separator;

221-a second via; 222-one-way valve; 230-cylinder; 231-a first via; 232-flow channel;

233-a first fluid port; 234-second fluid port; 235-a third through hole; 236-a first cavity;

237-a second cavity; 238-a third cavity; 239-cavity; 239 a-top surface; 239 b-bottom surface;

240-a pressurizing mechanism; 241-pressurizing the block; 242-rotating shaft; 243-stick pulling; 244-rack;

245-a one-way bearing; 245 a-an inner ring member; 245 b-an outer ring; 245 c-a first tooth;

245 d-a second tooth; 246-support bearings; 247-gear; 250-slide bar; 260-insert rod;

300-universal wheel.

Drawings

Fig. 1 is a partial sectional view showing a closed state of a sliding rail type civil air defense door apparatus provided by a conventional scheme.

Fig. 2 is a partial sectional view showing a door opening state of a sliding rail type civil air defense door apparatus provided by a conventional scheme.

Fig. 3 is a schematic structural view of a rotating shaft structure in the rotary shaft type civil air defense door apparatus according to the conventional scheme.

Fig. 4 is a schematic structural diagram of a door spindle structure according to an embodiment of the present disclosure.

Fig. 5 is an assembly view of a door spindle structure according to an embodiment of the present application.

Fig. 6 is a schematic cross-sectional view of a hydraulic device in a retracted state of a sliding rod in a door spindle structure according to an embodiment of the present disclosure.

Fig. 7 is a schematic cross-sectional view of a hydraulic device with a sliding rod of a door spindle structure in an extended state according to an embodiment of the present disclosure.

Fig. 8 is an enlarged schematic view of a portion a of a door spindle structure according to an embodiment of the present application.

Fig. 9 is a schematic view illustrating a use state of a door spindle structure according to an embodiment of the present application.

Fig. 10 is a schematic view at B in a door spindle structure according to an embodiment of the present application.

Fig. 11 is a schematic diagram illustrating a unidirectional rotation operation state of a unidirectional bearing in a door spindle structure according to an embodiment of the present application.

Fig. 12 is a schematic view illustrating a free-rotation operation state of a one-way bearing in a door spindle structure according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

According to fig. 5, the present application provides a door spindle structure f. The door shaft structure f can be applied to a civil air defense door a device. The civil air defense door a device comprises a rotating shaft structure d and a civil air defense door a, wherein the civil air defense door a comprises a door frame e and a door body a embedded in the door frame e, the rotating shaft structure d is arranged on one side of the civil air defense door a, and the rotating shaft structure d is connected with the door frame e and the door body a so that the door frame e is connected with the door body a in a rotating mode.

As shown in fig. 5, in an embodiment of the present application, the door shaft structure f is disposed at the other side of the civil air defense door a. And the door shaft structure f is fixedly connected to the door body a.

As shown in fig. 4, the door shaft structure f includes a connection member 100, a hydraulic device 200, and a universal wheel 300. The connector 100 is fixedly connected to the door body a. The universal wheel 300 is fixedly connected with the slide rod 250. The hydraulic device 200 is fixedly connected with the connecting member 100.

The hydraulic device 200 includes a cylinder 230 and a slide bar 250. The cylinder 230 is internally provided with a cavity 239. And an opening is provided at one end of the cylinder 230 near the ground. The slide bar 250 is disposed within the cavity 239. The slide bar 250 is arranged to slide under pressure in the cavity 239 and to extend out of the cylinder 230. When the door spindle structure f is in the working state, the sliding rod 250 inside the hydraulic device 200 extends out of the cylinder 230 under the pressure, and pushes the universal wheel 300 to contact the ground to form a support.

Specifically, the connection member 100 may be connected to the door body a by welding or bolting. The universal wheel 300 is arranged to be movable 360 degrees relative to the rotational axis structure d. When the door needs to be opened, the sliding rod 250 in the hydraulic device 200 stretches out under the action of pressure to drive the universal wheel 300 to contact the ground. The universal wheel 300 contacts the ground to form a load bearing structure supporting the civil air defense door a. The force bearing structure formed by the door shaft structure f and the force bearing structure formed by the rotating shaft structure d support the civil air defense door a together. Under the action of the two sets of bearing structures, the civil air defense door a can not incline in the working state of opening the door, and the rotating shaft structure d is extruded.

Through having set up pivot structure d on the basis of one side of people's air defense door a, having set up door axle structure f on the opposite side of people's air defense door a, through having set up hydraulic means 200 in door axle structure f, the inside slide bar 250 of hydraulic means 200 sets up to can be in cavity 239 slides under the pressure effect, and can stretch out cylinder body 230, promote with slide bar 250 fixed connection's universal wheel 300 contact ground in order to form the support for door axle structure f is whole with the holding power that can accept ground facing people's air defense door a, has increased the bearing site through door axle system f on the basis of the bearing site that original pivot structure d provided, is favorable to preventing pivot structure d's deformation.

In an embodiment of the present application, according to fig. 6 and 7, the hydraulic device 200 further includes:

a first diaphragm 210 slidably disposed within the cavity 239; the first diaphragm 210 is disposed away from the ground.

The second partition 220 is disposed in the cavity 239, is disposed parallel to the first partition 210, and is fixedly connected to the inner wall of the cylinder 230; the second partition 220 is disposed near the ground.

The first baffle 210 and the second baffle 220 divide the cavity 239 into a first cavity 236, a second cavity 237 and a third cavity 238. The first chamber 236 is a receiving space formed between the cylinder top surface 239a and the first partition 210. The second cavity 237 is an accommodating space formed between the first partition 210 and the second partition 220, the third cavity 238 is an accommodating space formed between the second partition 220 and the bottom surface 239b of the cylinder 230, and the slide bar 250 is slidably disposed in the third cavity 238.

Specifically, the hydraulic device 200 acts as a core member for pressure bearing, and is capable of carrying high pressure values. But in particular performing the bearing task, it is necessary to perform the gradual pressurization by the relative movement of the first diaphragm 210 and the second diaphragm 220. The first and

second partitions

210 and 220 divide the interior of the cylinder 230 into three chambers. The first cavity 236 is configured to house a pressurizing mechanism 240. The second chamber 237 is used for accommodating hydraulic oil, the hydraulic oil is used for conducting the pressure of the pressurizing mechanism 240 to the slide bar 250, and the third chamber 238 is used for accommodating pressurized oil and the slide bar 250.

Through the division cooperation of the three cavities, the pressure of operators is increased gradually, so that the civil air defense door a can obtain larger supporting force. The sliding rod 250 can stretch out and draw back in the third cavity 238, and the civil air defense door a occupies a small volume in the door closing state. The first diaphragm 210 can slide relative to the second diaphragm 220, and the function of providing a bearing force by the hydraulic device 200 is realized by controlling the movement of the first diaphragm 210 to switch the telescopic state of the slide bar 250 in the third cavity 238.

In an embodiment of the present application, according to fig. 6, 7, 10 and 11, the cylinder 230 is provided with a first through hole 231, the door shaft structure f further includes a pressurizing mechanism 240, and the pressurizing mechanism 240 includes a pressurizing block 241, a rotating shaft 242 and a pulling rod 243.

The pressing block 241 is fixedly connected to the first partition 210. The pressing block 241 includes a tooth surface. The engaging surface is provided with a plurality of racks 244.

One end of the rotation shaft 242 protrudes into the cylinder 230 through the first through hole 231. The other end of the rotation shaft 242 protrudes out of the cylinder 230.

The pulling rod 243 is sleeved at one end of the rotating shaft 242 extending out of the cylinder 230.

Specifically, the pressing block 241 is provided with a rack 244 perpendicular to the engaging surface of the ground. One end of the rotary shaft 242 extending into the cylinder 230 is provided with a gear 247, and the gear 247 and the rack 244 transmit the pressure applied by the operator through engagement. One end of the rotating shaft 243, which is positioned on the outer wall of the cylinder body 230, is provided with a groove, the poking rod 243 is provided with a convex block, and the groove and the convex block are mutually nested and connected. When the pulling rod 243 rotates, the rotating shaft 242 is driven to rotate. When the slide bar 250 is extended by pressing, the pulling rod 243 is rotated, so that the rotation shaft 242 drives the pressing block 241 to move to the side close to the ground. When the sliding rod 250 is required to be contracted, the pulling rod 243 is pulled out, the rotating shaft 242 is in a free rotation state, and the pressurizing block 241 moves to the side far away from the ground.

In this embodiment, the paddle 243 is nested with the rotary shaft 242. When the rotation of the paddle 243 is blocked, the paddle 243 may be pulled out from the rotation shaft 242. The poking rod 243 is re-inserted into the rotation shaft 242 after re-adjusting the angle with the ground. The pulling rod 243 is advantageously pressurized gradually in a narrow space between the hydraulic device 200 and the connector 100.

In an embodiment of the present application, according to fig. 6, the outer surface of the end of the rotation shaft 242 extending into the cylinder 230 is provided with a gear 247. The gear 247 is used for being meshed with the rack 244, so that when the poking rod 243 is poked, the pressurizing block 241 drives the first partition 210 to move towards the direction approaching the second partition 220.

Specifically, the paddle 243 can control the pressurizing block 241 through the rotation shaft 242 to move the first barrier 210 relative to the second barrier 220.

In this embodiment, the movement of the first partition 210 relative to the second partition 220 conducts pressure, which is beneficial to the operator to gradually accumulate smaller force, so that larger hydraulic pressure is formed inside the hydraulic device 200, and further the civil air defense door a is supported.

In an embodiment of the present application, according to fig. 10 to 12, the pressing mechanism 240 further includes a one-way bearing 245.

One-way bearing 245 includes an inner ring 245a and an outer ring 245b.

The outer edge of the inner ring member 245a is provided with a plurality of first engaging teeth 245c, and the inner edge of the inner ring member 245a is fixedly connected to the rotating shaft 242.

The inner edge of the outer ring member 245b is provided with a plurality of second engaging teeth 245d, and the outer edge of the outer ring member 245b is fixedly connected to the wall of the first through hole 231.

When the sliding rod 250 extends out of the cylinder 230, the outer ring 245b is nested outside the inner ring 245a, and the first engaging teeth 245c and the second engaging teeth 245d are engaged with each other, so that the rotation shaft 242 rotates unidirectionally.

When the sliding rod 250 is retracted toward the cylinder 230, the inner ring 245a is separated from the outer ring 245b so that the rotation shaft 242 is free to rotate.

Specifically, a certain angle exists between the first engaging tooth 245c and the outer edge of the inner ring member 245a, a certain angle exists between the second engaging tooth 245d and the outer ring member 245b, when the pressurizing mechanism 240 pressurizes and needs the sliding rod 250 to extend out of the cylinder 230, the first engaging tooth 245c is attached to the second engaging tooth 245d, the inner ring member 245a can only rotate unidirectionally, an operator rotates the rotating shaft 242 through the pulling rod 243, the rotating shaft 242 enables the pressurizing block 241 to press the first partition 210, the first partition 210 is close to the second partition 220, hydraulic oil in the second cavity 237 enters the third cavity 238 through the one-way valve 222, and the sliding rod 250 is pushed to extend out of the cylinder 230. When the pressurizing mechanism 240 is not operated and the slide bar 250 is required to retract into the cylinder 230, the first tooth 245c is separated from the second tooth 245d, and the inner ring 245a can rotate freely. The hydraulic oil of the third chamber 238 flows back to the second chamber 237. The first diaphragm 210 slides away from the second diaphragm 220, and the slide bar 250 retracts the cylinder 230.

In this embodiment, the inner ring 245a and the outer ring 245b of the unidirectional bearing 245 are key to unidirectional movement of the unidirectional bearing 245. When the first engaging tooth 245c of the inner ring member 245a is engaged with the second engaging tooth 245d of the outer ring member 245b, the first engaging tooth 245c is engaged with the second engaging tooth 245 d. Only one way movement is possible in a direction in which the first teeth 245c are angled with respect to the outer edge of the inner ring member 245 a. Such a structure realizes gradual pressurization. When the external force is pulled out, the pressing block 241 tends to rebound in a direction away from the second separator 220. Since the one-way valve 222 is in operation, it opens in one direction. When the one-way valve 222 is opened to closed, the second chamber 237 and the third chamber 238 are in communication, so that the one-way bearing 245 is required as a second limiting structure to prevent the pressing block 241 from rebounding in a direction away from the second partition 220.

In an embodiment of the present application, the pressurization mechanism further includes a support bearing 246. The support bearing 246 is disposed between the rotation shaft 242 and the first through hole 231 and is sleeved on the rotation shaft 242, for supporting the rotation shaft 242, so that the inner ring 245a and the outer ring 245b are separated and combined under the guide of the rotation shaft 242.

Specifically, the support bearing 246 serves as an auxiliary support in both operating states of the one-way bearing 245. When the first tooth 245c is engaged with the second tooth 245d, the support bearing 246 supports the rotation shaft 242. The support bearing 246 provides a smoother rotation of the shaft 242, reducing friction. When the first tooth 245c and the second tooth 245d are separated, the pulling rod 243 pulls the rotation shaft 242, and the rotation shaft 242 slides along the axial direction of the support bearing 246 under the support of the support bearing 246. The first tooth 245c is separated from the second tooth 245 d. The rotation shaft 242 is now free to rotate.

In the present embodiment, the support bearing 246 supports the rotation shaft 242 inside the first through hole 231, reducing friction between the rotation shaft 242 and the first through hole 23'. The support bearing 246 also provides a sliding track for the one-way bearing 245.

In an embodiment of the present application, according to fig. 6 to 7, the door spindle structure f further includes a second through hole 221. The second through hole 221 is disposed above the second separator 220. The second through hole 221 is provided with a one-way valve from the second cavity 237 to the third cavity 238.

In the present hydraulic structure, the cooperation of the second through hole 221 and the one-way valve 222 is for unidirectional flow of the hydraulic oil of the second chamber 237 to the third chamber 238. When the pressurizing mechanism 240 pressurizes 210 the first diaphragm, hydraulic oil pushes open the one-way valve 222 to flow to the third chamber 238. The hydraulic fluid in the third chamber 238 will only push the one-way valve 222 against the second diaphragm 220.

In this embodiment, the one-way valve 222 is used as a first limiting mechanism, which ensures one-way pressure conduction and is beneficial to realizing gradual pressurization of an operator.

In an embodiment of the present application, according to fig. 8, the door shaft structure f further includes a flow channel. The runner 232 is disposed on the cylinder 230, and the runner 232 communicates with the second cavity 237 and the third cavity 238.

Two first fluid passage ports 233 are disposed at two ends of the fluid passage 232, the second partition plate 220 is disposed between the two first fluid passage ports 233, the first fluid passage ports 233 are disposed in close contact with the second partition plate 220, and the two first fluid passage ports 233 are all formed in the inner wall of the cylinder 230.

Specifically, the flow passage 232 is at the cylinder wall of the cylinder 230. The flow channel 232 communicates the second chamber 237 with the third chamber 238. When the slide bar 250 is required to retract, the hydraulic oil flows back from the first flow passage 233 of the third chamber 238 to the first flow passage 233 of the second chamber 237 through the flow passage 232. Because of the small volume of the cylinder 230, the first fluid port 233 of the third chamber 238 and the first fluid port 233 of the second chamber 237 are both proximate to the second partition 220 in order to utilize the volume of the cylinder 230 as much as possible.

In this embodiment, when the slide bar 250 is to be retracted, the flow channel 232 acts to relieve the pressure within the third chamber 238. During pressurization, the flow passage 232 is blocked. The hydraulic oil of the second chamber 237 cannot flow to the third chamber 238 through the flow passage 232. The hydraulic oil of the third chamber 238 cannot flow to the third chamber 238 through the flow passage 232. The first fluid passage opening 232 is proximate to the second separator 220, which is beneficial to improving the utilization of the cylinder 230.

In an embodiment of the present application, the door spindle structure f further includes a second fluid passage opening 234. The second runner port 234 is formed on a side of the runner 232 near the outer wall of the cylinder 230. The second fluid passage opening 234 is located between two first fluid passage openings 233.

And a third through hole 235, which is opened on the outer wall of the cylinder 230, and the third through hole 235 is communicated with the second fluid passage 234.

The rod 260 blocks the flow passage 232 when the rod 260 is inserted into the flow passage 232 along the third through hole 235 and the second flow passage 234.

Specifically, since the cylinder 230 is cast, the runner 232 is integrally formed. The second runner port 234 and the third runner port 235 are also integrally formed during casting. The second flow passage 234 is an opening of the flow passage 232. When the plug 260 is inserted into the second fluid passage opening 234 through the third through hole 235, the fluid passage 232 is blocked by the plug 260. When the slide bar 250 needs to be retracted, the plunger 260 is moved to the third through hole 235 to cause unobstructed matter within the second fluid passage opening 234. The flow passage 232 is turned on and the hydraulic oil flows back.

In this embodiment, the plug 260 is a switch for returning hydraulic oil, and the second fluid passage 234 is used for accommodating the plug 260. The plunger 260 is pushed to control the backflow of hydraulic oil, so that the sliding rod 250 can be smoothly retracted into the cylinder 230.

According to fig. 9, the application further provides a civil air defense door device. The civil air defense door a comprises a door frame e and a door body a embedded in the door frame e.

The rotating shaft structure d is arranged on one side of the civil air defense door a. The door frame e is connected with the door body a through the rotating shaft structure d, so that the door frame e is connected with the door body a in a rotating mode, the door shaft structure f is arranged on the other side of the civil air defense door a, and the door shaft structure f is fixedly connected with the door body a.

Specifically, the door spindle structure f is fixed to the opposite side of the rotating shaft structure d. When door opening is required, the slide bar 250 extends out of the cylinder 230. The universal wheel 300 fixedly connected with the slide bar 250 contacts the ground. The universal wheel 300 provides a contact site, forming a support system independent of the spindle structure. When the civil air defense door a rotates around the rotating shaft structure d, the universal wheel 300 rotates 360 degrees around the rotating shaft structure d.

In this embodiment, the door shaft structure f is independent of the rotating shaft structure d, and plays a role in supporting the weight of the civil air defense door a. The door shaft structure f disperses the gravity of the civil air defense door a, and prevents the civil air defense door a from acting the gravity of the civil air defense door a on the rotating shaft system d. Deformation of the rotating shaft structure d is prevented. The rotating shaft structure d is used for connecting the door frame e and the door body a, and the door is not pressed by the gravity of the door body a in the door opening process. Under the supporting action of the door shaft structure f, the situation that the civil air defense door a is difficult to open and close can not occur in the rotating shaft structure d.

The technical features of the above embodiments may be combined arbitrarily, and the steps of the method are not limited to the execution sequence, so that all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description of the present specification.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.

Claims

1. The utility model provides a door axle construction, is applied to a people's air defense door equipment, people's air defense door equipment includes pivot structure and people's air defense door, people's air defense door includes the door frame and inlays the door body of locating in the door frame, pivot structure set up in one side of people's air defense door, pivot structure connects the door frame with the door body to make door frame with the door body rotates to be connected, its characterized in that, the door axle construction set up in the opposite side of people's air defense door, just door axle construction fixed connection in the door body;

the door spindle structure includes:

the connecting piece is fixedly connected to the door body;

the universal wheel is fixedly connected with the sliding rod;

2. The door spindle structure of claim 1, wherein the hydraulic device further comprises:

3. The door spindle structure according to claim 2, wherein the cylinder is provided with a first through hole, the door spindle structure further comprising a pressurizing mechanism including:

4. A door spindle structure according to claim 3, wherein a gear is provided on an outer surface of an end of the rotating shaft extending into the cylinder; the gear is used for being meshed with the rack, so that when the poking rod is poked, the pressurizing block drives the first partition plate to move towards the direction close to the second partition plate.

5. The door spindle structure of claim 4, wherein the pressing mechanism further comprises:

6. The door spindle structure of claim 5, wherein the pressurization mechanism further comprises:

7. The door spindle structure of claim 6, further comprising:

the second through hole is arranged above the second partition board; and a one-way valve in the direction from the second cavity to the third cavity is arranged at the second through hole.

8. The door spindle structure of claim 7, further comprising:

the runner is arranged on the cylinder body and is communicated with the second cavity and the third cavity;

9. The door spindle structure of claim 8, further comprising:

the second runner opening is formed in one side, close to the outer wall of the cylinder body, of the runner; the second fluid passage opening is positioned between the two first fluid passage openings;

10. A civil air defense door apparatus comprising:

the civil air defense door comprises a door frame and a door body embedded in the door frame;

the rotating shaft structure is arranged at one side of the civil air defense door; the rotating shaft structure is connected with the door frame and the door body so as to enable the door frame to be rotationally connected with the door body; the door spindle structure as claimed in any one of claims 1 to 9, being provided at the other side of the civil air defense door, and being fixedly connected to the door body.