Auxiliary filter screen frame of electric passenger car

Abstract

The utility model discloses an electric passenger car auxiliary filter screen frame which comprises a fixed frame (1), a detachable frame (2) and a middle layer filter screen (3), the middle layer filter screen (3) is arranged between the fixed frame (1) and the detachable frame (2), an indexing pin (4) is installed on the fixed frame (1) in a welding mode, and an indexing pin head (5) used for fixing / detaching the detachable frame (2) is arranged on the indexing pin (4). At least one indexing pin stopper (7) matched with the indexing pin (4) on the fixed frame (1) for use is mounted at the corresponding position of the detachable frame (2); the utility model has the beneficial effects that the filter cotton frame and the pressing plate structure are optimized and reformed on the premise that the overall basic function requirement of the filter screen frame is met by taking the independent research design as the main part: the indexing pin structure is used for replacing a bolt structure for locking and fixing, and the filter screen frame is first in the industry, completely original, reliable in structure, high in durability, capable of being operated by a single person, and quick to disassemble and assemble; and the method is convenient to popularize.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary power supply box filter technology for electric buses, and specifically to an auxiliary filter frame for electric buses. Background Technology

[0002] The auxiliary filter screen of the West Coast Express electric train is installed above the auxiliary power supply box to prevent external dust and impurities from entering the auxiliary unit and charger unit during train operation, which could cause poor electrical contact and affect the safe operation of the train. The filter screen needs to be cleaned and replaced regularly to prevent excessive accumulation of dust and impurities from affecting the heat dissipation of auxiliary components.

[0003] Currently, the auxiliary filter screen's fixing plate is secured by six M6 bolts, which are welded to the frame. During routine cleaning, maintenance, and replacement, the nuts on these M6 bolts need to be frequently removed, causing significant wear on the threads and reducing thread engagement. When bolts experience stripping or breakage, due to their non-removable nature, the entire auxiliary filter screen frame must be sent to the manufacturer for maintenance. Furthermore, the vibrations generated during train operation can easily cause the fixing nuts on the bolts to loosen. Statistics show that several instances of fatigue fracture of the M6 ​​fixing bolts have occurred previously, and these issues have increased operating and maintenance costs to some extent.

[0004] The defects and shortcomings are as follows:

[0005] ① Bolts are prone to wear and have a high failure rate: The auxiliary filter frame of the electric passenger car needs to be disassembled regularly for cleaning and filter replacement, requiring disassembly and maintenance once a month on average per train. According to failure statistics, the auxiliary filter frame fails approximately 30 times a year due to bolt wear.

[0006] ②Low maintenance efficiency: The current auxiliary filter frame structure has a total of 6 bolts, each bolt has a tightening force of 3.7Nm, which makes maintenance time-consuming.

[0007] ③ High replacement cost: The mounting bolts on the auxiliary filter frame are prone to thread wear and stripping under frequent disassembly and assembly conditions. Since the bolts and frame are an integral structure, the entire filter needs to be sent back to the manufacturer for maintenance and replacement of spare parts, which consumes a lot of materials and labor costs. Utility Model Content

[0008] To overcome the problems of easy wear, high failure rate, low maintenance efficiency, and high replacement cost of traditional bolts, this utility model provides an auxiliary filter frame for electric buses.

[0009] The technical solution adopted by this utility model to achieve the above-mentioned objectives is as follows: it includes a fixed frame, a detachable frame, and a middle filter screen. The middle filter screen is disposed between the fixed frame and the detachable frame. An indexing pin is welded and installed on the fixed frame. The indexing pin is provided with an indexing pin head for fixing / removing the detachable frame. The detachable frame is equipped with at least one indexing pin stop at a corresponding position that cooperates with the indexing pin on the fixed frame to achieve the effect of clamping the middle filter screen.

[0010] Preferably, a groove is designed at the center line of the fixed frame panel to facilitate opening the detachable frame and taking out the middle filter.

[0011] Preferably, the indexing pin head is vertically centered and without skewing.

[0012] Preferably, the indexing pin stop is fixed at both ends with rivets.

[0013] Preferably, the indexing pin body is fixed to the fixed frame by welding.

[0014] The beneficial effects of this utility model are: based on independent research and design, while meeting the basic functional requirements of the filter frame as a whole, the filter cotton frame and pressure plate structure are optimized and modified: the indexing pin structure is used to replace the bolt structure for locking and fixing.

[0015] ① Industry first, completely original: Before the release of this structural solution, there was no such auxiliary filter frame structure in the industry. The invention of this structure has completed the overall optimization of the auxiliary power box filter of this type of electric bus in the industry and is the first of its kind in the industry.

[0016] ② Reliable structure and high durability: In the second quarter of 2019, the West Coast Express optimized and verified the auxiliary filter frame structure, selecting vehicles 1324 and 1330 to install two new auxiliary filter frame structures for mainline testing. Until the end of 2022, the new auxiliary filter frame never showed any structural aging, damage, or other malfunctions.

[0017] In early 2024, the West Coast Express collaborated with its suppliers to independently replace all 39 electric multiple units (EMUs) with new models. By June, the replacement was complete, reducing the post-warranty failure rate and lowering material costs. Since the replacement, there have been no reports of auxiliary filter frame structure failures.

[0018] The first batch of filter frames tested on the vehicle have not shown any signs of aging or damage in the approximately 5 years since July 2019, demonstrating a long structural lifespan.

[0019] ③ Single-person operation, quick disassembly and assembly: The device is ingeniously designed and uses an indexing pin structure to achieve quick disassembly and assembly of the filter frame. Compared with the original bolt structure, it saves 75% of the time for a single person to operate a single frame.

[0020] ④ Cost advantage and ease of promotion: If a bolt fails, the entire filter frame needs to be replaced, incurring significant manpower and time costs during the warranty period. Outside the warranty period, spare parts must be purchased separately, resulting in high material costs. If this solution is adopted, according to test data, the filter frame failure rate due to structural issues is reduced to almost zero. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the auxiliary filter frame for electric buses;

[0022] Figure 2 This is the front view of the auxiliary filter frame of the electric bus;

[0023] Figure 3 This is a left view of the auxiliary filter frame of the electric bus;

[0024] Figure 4 This is a top view of the auxiliary filter frame of the electric bus;

[0025] In the diagram: 1. Fixed frame; 2. Demountable frame; 3. Middle filter screen; 4. Indexing pin; 5. Indexing pin head; 6. Groove; 7. Indexing pin stop. Detailed Implementation

[0026] like Figure 1-2 As shown, the auxiliary filter frame for electric buses of this utility model includes a fixed frame 1, a detachable frame 2, and a middle filter 3. A dividing pin 4 is welded and installed on the fixed frame 1. The detachable frame 2 can be fixed / removed by pressing / pulling the black dividing pin head 5. A groove 6 is designed at the center line of the panel of the fixed frame 1 to facilitate opening the detachable frame 2 and removing the middle filter 3.

[0027] The detachable frame 2 has two indexing pin stops 7 installed at corresponding positions, which are fixed at both ends with rivets. The indexing pin stops 7 work in conjunction with the indexing pins 4 on the fixed frame 1 to achieve the effect of clamping the middle filter screen 3.

[0028] The indexing pin head 5 is vertically centered and without any tilting.

[0029] The indexing pin 4 is fixed to the fixed frame 1 by welding.

Claims

1. An auxiliary filter frame for electric buses, characterized in that: The system includes a fixed frame (1), a detachable frame (2), and a middle filter (3). The middle filter (3) is located between the fixed frame (1) and the detachable frame (2). A dividing pin (4) is welded and installed on the fixed frame (1). The dividing pin (4) is provided with a dividing pin head (5) for fixing / removing the detachable frame (2). The detachable frame (2) is equipped with at least one dividing pin stop (7) at the corresponding position that cooperates with the dividing pin (4) on the fixed frame (1).

2. The auxiliary filter frame for electric buses according to claim 1, characterized in that: A groove (6) is designed at the center line position of the panel of the fixed frame (1).

3. The auxiliary filter frame for electric buses according to claim 1, characterized in that: The indexing pin head (5) is vertically centered and without any tilt.

4. The auxiliary filter frame for electric buses according to claim 1, characterized in that: The indexing pin stop (7) is fixed at both ends with rivets.

5. The auxiliary filter frame for electric buses according to claim 1, characterized in that: The indexing pin (4) is fixed to the fixed frame (1) by welding.

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