Return air filter screen fixing device of subway train air conditioner

Abstract

The utility model discloses a subway train air conditioner return air filter screen fixing device, which relates to the technical field of subway trains and comprises a fixing frame, a filter screen is movably mounted on the surface of the fixing frame, two groups of support frames are fixedly mounted on the surface of the filter screen, and the support frames are symmetrically distributed and fixedly mounted on the surface of the fixing frame. A fixing mechanism is arranged on the surface of the fixing frame. The threaded rod is in threaded connection with the fixed seat and is fixed through the locking nut, so that the threaded rod cannot be separated from the fixed seat even if the threaded rod is loosened, the connecting rod is connected with the circular nut through the external thread at the bottom end, and when the filter screen needs to be installed, the connecting rod is pulled to be separated from the movable groove, and the spring is compressed under the cooperation of the circular nut and the movable seat; at the moment, the connecting rod is rotated, the spring cannot rebound, one end of the filter screen is inserted into the clamping groove formed by the supporting frame and the fixing frame, then the filter screen is completely placed in the fixing frame, the connecting rod is rotated to reset to the movable groove, and the L-shaped pressing plate abuts against the filter screen to complete fixing.

Description

Technical Field

[0001] This utility model relates to the field of subway train technology, specifically to a fixing device for the return air filter of subway train air conditioning. Background Technology

[0002] In modern urban rail transit systems, subways have become a key passenger transport tool for daily travel. Due to their high capacity and high frequency, the carriages are densely packed with people in a relatively enclosed space, and passengers' breathing and activities can cause the air inside to become stale. To create a comfortable and healthy riding environment, the subway train's air conditioning system is crucial, and the return air filter is a core component ensuring the efficient operation of the air conditioning system and the air quality inside the carriage. To ensure the quick removal of the return air filter and prevent air leakage, a subway train air conditioning return air filter fixing device is needed.

[0003] The existing subway train air conditioning return air filter fixing device has the following shortcomings:

[0004] The use of spur bolts to fix the mounting plate results in excessively long disassembly time. In subway train applications, disassembly is too cumbersome, increasing working time. Furthermore, repeated disassembly and reassembly can easily damage the threads, leading to the return air filter falling off. Utility Model Content

[0005] The purpose of this invention is to provide a fixing device for the return air filter of subway train air conditioning, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A subway train air conditioning return air filter fixing device includes a fixing frame, on which a filter is movably installed, and on which a support frame is fixedly installed. Two sets of support frames are provided, which are symmetrically distributed and fixedly installed on the surface of the fixing frame. A fixing mechanism is provided on the surface of the fixing frame.

[0008] The fixing mechanism includes a fixing seat, which is fixedly installed on the surface of the fixing frame. There are two sets of fixing seats, which are symmetrically distributed on the surface of the fixing frame. A threaded rod is threadedly connected to the surface of the fixing seat, and a locking nut is threadedly connected to the surface of the threaded rod. A movable seat is fixedly installed on the surface of the threaded rod.

[0009] A further improvement of this utility model is that a circular nut is movably installed inside the threaded rod, and a spring is fixedly installed on the surface of the circular nut.

[0010] A further improvement of this utility model is that the spring is movably installed inside the threaded rod, and one end of the spring is fixedly installed inside the movable seat.

[0011] A further improvement of this utility model is that a connecting rod is movably installed inside the movable seat, and the bottom end of the connecting rod is provided with an external thread, which is compatible with a circular nut.

[0012] A further improvement of this utility model is that: the surface of the movable seat is provided with a movable groove, which is adapted to the connecting rod.

[0013] A further improvement of this utility model is that an L-shaped pressure plate is fixedly installed on the surface of the connecting rod, and the L-shaped pressure plate is movably installed on the surface of the filter screen.

[0014] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0015] This utility model provides a fixing device for the return air filter of a subway train air conditioner. It employs a fixed frame, filter, support frame, fixing mechanism, movable seat, movable groove, connecting rod, L-shaped pressure plate, fixed seat, threaded rod, locking nut, round nut, spring, and external thread. The fixed seat is fixed to one side of the fixed frame, and the threaded rod is threadedly connected to the fixed seat. The fixed seat is also fixed to one side of the fixed frame, and the threaded rod is threadedly connected to the fixed seat and secured with a locking nut, ensuring that the threaded rod will not detach from the fixed seat even if it loosens. The connecting rod is connected to the round nut through its bottom external thread. When the filter needs to be installed, the connecting rod is pulled out of the movable groove, and the round nut and movable seat engage. When the spring is compressed, rotating the connecting rod prevents it from rebounding. Then, insert the end of the filter screen furthest from the fixing mechanism into the groove formed by the support frame and the fixed frame. Place the filter screen completely inside the fixed frame and rotate the connecting rod back to the movable groove. This causes the spring to rebound, pulling the connecting rod into the threaded rod and causing the L-shaped pressure plate to hold the filter screen in place, thus completing the fixing. To remove the filter screen, simply pull and rotate the connecting rod until the L-shaped pressure plate no longer holds the filter screen. Then, detach one end of the filter screen from the support frame to complete the removal. In some cases, a fixed base is not required; the threaded rod can be directly connected to the surface of the fixed frame, improving the device's convenience and adaptability. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention from an axial view perspective;

[0018] Figure 3This is a partially enlarged structural diagram of part A of this utility model;

[0019] Figure 4 This is a schematic diagram of the fixing mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the spring of this utility model.

[0021] In the diagram: 1. Fixed frame; 2. Filter screen; 3. Support frame; 4. Fixing mechanism; 401. Movable seat; 402. Movable groove; 403. Connecting rod; 404. L-shaped pressure plate; 405. Fixed seat; 406. Threaded rod; 407. Locking nut; 408. Round nut; 409. Spring; 410. External thread. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to embodiments:

[0023] Example 1

[0024] like Figure 1-5 This utility model provides a fixing device for the return air filter of a subway train air conditioner, including a fixing frame 1. A filter 2 is movably installed on the surface of the fixing frame 1. A support frame 3 is fixedly installed on the surface of the filter 2. Two sets of support frames 3 are provided, symmetrically distributed and fixedly installed on the surface of the fixing frame 1. A fixing mechanism 4 is provided on the surface of the fixing frame 1. The fixing mechanism 4 includes a fixing seat 405, which is fixedly installed on the surface of the fixing frame 1. Two sets of fixing seats 405 are provided, symmetrically distributed on the surface of the fixing frame 1. A threaded rod 406 is threadedly connected to the surface of the fixing seat 405. A locking nut 407 is threadedly connected to the surface of the threaded rod 406. A movable seat 401 is fixedly installed on the surface of the threaded rod 406. A circular nut 408 is movably installed inside the threaded rod 406. A spring 409 is fixedly installed on the surface of the circular nut 408. The spring 409 is movably installed inside the threaded rod 406. One end of the spring 409 is fixedly installed inside the movable seat 401. The movable seat 401 is fixedly installed on the surface of the threaded rod 406. A connecting rod 403 is movably installed inside the movable seat 401. The bottom end of the connecting rod 403 is provided with an external thread 410, which is compatible with the circular nut 408. The surface of the movable seat 401 is provided with a movable groove 402, which is compatible with the connecting rod 403. An L-shaped pressure plate 404 is fixedly installed on the surface of the connecting rod 403. The L-shaped pressure plate 404 is movably installed on the surface of the filter screen 2.

[0025] In this embodiment, the fixed base 405 is fixed to one side of the fixed frame 1. The threaded rod 406 is threadedly connected to the fixed base 405 and fixed with the locking nut 407, so that the threaded rod 406 will not detach from the fixed base 405 even if it is loosened. The connecting rod 403 is connected to the round nut 408 through the external thread 410 at the bottom. When the filter screen 2 needs to be installed, the connecting rod 403 is pulled to disengage from the movable groove 402. Under the cooperation of the round nut 408 and the movable base 401, the spring 409 is compressed. At this time, the connecting rod 403 is rotated so that the spring 409 cannot rebound. Then, the end of the filter screen 2 away from the fixing mechanism 4 is inserted into the support frame 3 and the fixed frame 1. Place the filter screen 2 completely into the fixed frame 1 within the slot, and rotate the connecting rod 403 back to the movable slot 402. This causes the spring 409 to rebound and pull the connecting rod 403 into the threaded rod 406, which in turn drives the L-shaped pressure plate 404 to press against the filter screen 2, thus completing the fixation. When it is necessary to disassemble the filter screen 2, simply pull the connecting rod 403 and rotate it so that the L-shaped pressure plate 404 no longer presses against the filter screen 2. At this time, one end of the filter screen 2 can be detached from the support frame 3 to complete the disassembly. In some cases, the fixed seat 405 can be omitted, and the threaded rod 406 can be directly connected to the surface of the fixed frame 1, which improves the convenience and adaptability of the device.

[0026] The working principle of the air conditioning return air filter fixing device in this subway train will be explained in detail below.

[0027] like Figure 1-5 As shown, the fixed rod 406 is threaded to one side of the fixed frame 1 via the fixed base 405, and is further secured by the locking nut 407, ensuring that the threaded rod 406 will not detach from the fixed base 405 even if it loosens. The connecting rod 403 is connected to the round nut 408 via the external thread 410 at its bottom end. When the filter screen 2 needs to be installed, the connecting rod 403 is pulled out of the movable slot 402, and the spring 409 is compressed under the cooperation of the round nut 408 and the movable base 401. At this time, the connecting rod 403 is rotated, preventing the spring 409 from rebounding. Then, the end of the filter screen 2 away from the fixed mechanism 4 is inserted into the support frame 3 and the fixed frame 1. Inside the slot, place the filter screen 2 completely inside the fixed frame 1, and rotate the connecting rod 403 back to the movable slot 402. This causes the spring 409 to rebound and pull the connecting rod 403 into the threaded rod 406, which in turn drives the L-shaped pressure plate 404 to press against the filter screen 2, thus completing the fixation. When it is necessary to disassemble the filter screen 2, simply pull the connecting rod 403 and rotate it so that the L-shaped pressure plate 404 no longer presses against the filter screen 2. At this time, one end of the filter screen 2 can be detached from the support frame 3 to complete the disassembly. In some cases, the fixed seat 405 can be omitted, and the threaded rod 406 can be directly connected to the surface of the fixed frame 1, which improves the convenience and adaptability of the device.

[0028] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. Subway train air conditioner return air filter fixing device, comprising a fixed frame (1), characterized in that: The surface of the fixed frame (1) is movably mounted with a filter screen (2), the surface of the filter screen (2) is fixedly mounted with a support frame (3), the support frame (3) is provided with two groups, the support frames (3) are symmetrically distributed and fixedly mounted on the surface of the fixed frame (1), and the surface of the fixed frame (1) is provided with a fixing mechanism (4). The fixing mechanism (4) comprises a fixed seat (405), the fixed seat (405) is fixedly mounted on the surface of the fixed frame (1), the fixed seat (405) is provided with two groups, the fixed seats (405) are symmetrically distributed on the surface of the fixed frame (1), the surface of the fixed seat (405) is threadedly connected with a threaded rod (406), the surface of the threaded rod (406) is threadedly connected with a locking nut (407), and the surface of the threaded rod (406) is fixedly mounted with a movable seat (401).

2. The air conditioner return air filter screen fixing device for a subway train according to claim 1, characterized in that: The inside of the threaded rod (406) is movably mounted with a circular nut (408), and the surface of the circular nut (408) is fixedly mounted with a spring (409).

3. The air conditioner return air filter screen fixing device for a subway train according to claim 2, characterized in that: The spring (409) is movably mounted in the threaded rod (406), and one end of the spring (409) is fixedly mounted in the inside of the movable seat (401).

4. The air conditioner return air filter screen fixing device for a subway train according to claim 2, characterized in that: The inside of the movable seat (401) is movably mounted with a connecting rod (403), the bottom end of the connecting rod (403) is provided with an external thread (410), and the external thread (410) is matched with the circular nut (408).

5. The air conditioner return air filter fixing device for a subway train according to claim 4, characterized in that: The surface of the movable seat (401) is provided with a movable groove (402), and the movable groove (402) is matched with the connecting rod (403).

6. The air conditioner return air filter fixing device for a subway train according to claim 4, characterized in that: The surface of the connecting rod (403) is fixedly mounted with an L-shaped pressing plate (404), and the L-shaped pressing plate (404) is movably mounted on the surface of the filter screen (2).

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