A filter capacitor deformation testing tool for CRH1 motor train unit

Abstract

The application provides a CRH1 type motor train unit filter capacitor deformation amount test tool. The CRH1 type motor train unit filter capacitor deformation amount test tool comprises a support, two sliding assemblies, the two sliding assemblies are installed on the top of the support, a dovetail groove smooth table is installed on the top of the support, and a movable base is installed on the top of the sliding assembly and the dovetail groove smooth table. The CRH1 type motor train unit filter capacitor deformation amount test tool provided by the application avoids material loss caused by misjudgment of filter capacitor replacement, one person can complete a set of vehicle detection in one hour, the efficiency is improved by 300% compared with the original 2-person 6-hour operation mode, the lifting handle is convenient for on-site transfer, the laser line is clear under dark light conditions, the equipment can be used without professional training, the tool manufacturing cost is lower than the replacement loss of more than 20,000 yuan of a single capacitor, the repeated measurement data is stable and has no dispersion deviation, and the detection accuracy, operation efficiency and operation economy are considered.

Description

Technical Field

[0001] This invention relates to the field of testing technology for the deformation of filter capacitors in CRH1 high-speed trains, and particularly to a testing fixture for the deformation of filter capacitors in CRH1 high-speed trains. Background Technology

[0002] The CRH1 is a 250 km / h Harmony EMU, manufactured by the Qingdao Sifang Bombardier joint venture factory, which introduced and improved the Swedish Regina prototype. It was put into operation on the Guangzhou-Shenzhen line in 2007 and is commonly known as the "Big Metro". It has branches such as the CRH1A eight-car standard intercity model (5 powered cars and 3 trailer cars), the CRH1B sixteen-car long-formation model, and the CRH1E sleeper model. It has a stainless steel car body with a large passenger capacity, adopts AC-DC-AC electric transmission and regenerative braking, supports multiple-unit operation, and is suitable for intercity and conventional trunk lines. In the early operation, the speed limit was 200 to 220 km / h, which was later increased to the design speed of 250 km / h. It is easy to maintain and has an outstanding passenger capacity.

[0003] The deformation test of the filter capacitors in the CRH1 EMU is a specialized test for inspecting the deformation of the filter capacitor housing in the converter. First, the capacitor is completely discharged. Then, calipers and laser measuring tools are used to measure the radial and axial expansion values ​​of the housing. The values ​​are compared with the original factory dimensions to determine whether the deformation exceeds the limit. At the same time, bulging, leakage, and seal cracking are checked. Two types of deformation causes are distinguished: thermal aging and overpressure bulging. The data is recorded and compared with the maintenance standards. Capacitors that exceed the limit are replaced immediately to avoid insulation breakdown, short circuit and fire, and ensure the stable operation of the traction converter system's filtering and voltage regulation.

[0004] The existing CRH1 EMU filter capacitor deformation testing fixture relies solely on manual single-line measurements using rulers and ordinary calipers on-site, which has three inherent defects: First, the measuring tools are limited to a single line segment dimension, failing to reconstruct the overall curved surface morphology of the capacitor bulge, resulting in biased and distorted measurement data; second, measurement positioning depends entirely on the operator's practical experience, lacking a unified benchmark and limit structure, making it impossible to avoid human positioning deviations and ensuring a lack of standardized measurement benchmarks; third, the single-line measurement mode cannot accurately pinpoint the maximum bulge point on the capacitor casing, failing to accurately reflect the degree of capacitor degradation, which can lead to misjudgment and replacement of intact capacitors, resulting in material waste, and also misses out on bulge faults exceeding the limit, posing a safety hazard to train operation.

[0005] Therefore, it is necessary to provide a testing fixture for the deformation of the filter capacitor of the CRH1 type EMU to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides a testing fixture for the deformation of filter capacitors in CRH1 high-speed trains, which solves the problems of existing CRH1 capacitor testing fixtures that involve manual single-line measurement, lack of reference tools, difficulty in measuring the maximum bulge, and potential safety hazards due to misjudgment.

[0007] To solve the above-mentioned technical problems, the CRH1 type EMU filter capacitor deformation testing fixture provided by the present invention includes: a bracket;

[0008] Two sliding components are mounted on the top of a bracket, and a dovetail groove smooth table is mounted on the top of the bracket.

[0009] A movable base is installed on top of a sliding assembly and a dovetail groove smooth table. A laser measuring assembly is installed on the top of the movable base. Multiple caliper assemblies are installed on the top of the movable base. A placement assembly is installed on the top of the movable base. A filter capacitor is installed inside the placement assembly.

[0010] Two handles are mounted on top of the movable base;

[0011] The bracket is made of milled aluminum alloy profiles. The gaps between the profile joints must be evenly coated with anti-rust sealant to prevent moisture from the workshop from penetrating the internal guide rail structure. After the two sets of sliding components are assembled onto the top surface of the bracket, special low-viscosity guide rail grease must be added. The interval between each grease injection should be controlled at once a week. Ordinary grease must not be used to prevent abnormal damping from affecting the accuracy of 2D scanning. When assembling the dovetail groove smooth table with the threaded holes of the bracket, all are locked with anti-loosening spring washers. If the table is not used for a long time, the sliding clearance should be checked every half month. If shaking occurs, tighten the threaded connection in time. The connection points between the movable base and the sliding components and the dovetail groove smooth table are reserved with standard installation holes. An external data recording module can be added as needed. This expansion accessory is not pre-installed at the factory.

[0012] Preferably, the laser measurement assembly includes two mounting brackets, a connecting cable, two fixed bases, and two laser testing devices. The two mounting brackets are used to mount the fixed bases on the top of the movable base near one side, and the laser testing devices are mounted on one side of the fixed bases. The connecting cable is connected to the interface of the laser testing devices.

[0013] Preferably, the dovetail groove smooth table includes a base frame, a dovetail groove guide rail, an adjusting handwheel, a precision screw, a threaded hole, an adjusting base, and a locking structure. The dovetail groove guide rail is used to slide the adjusting base to the top of the base frame. The precision screw is used to install the adjusting handwheel on one side of the dovetail groove guide rail. The locking structure is installed on one side of the base frame. The threaded hole is opened on the top of the adjusting base.

[0014] One end of the precision screw is connected to the adjusting base, and the locking structure corresponds to the position of the adjusting base.

[0015] Preferably, the sliding assembly includes a stabilizing base, a slide rail, and a slider, wherein the stabilizing base is used to mount the slide rail on the top of the bracket, and the slider is slidably connected to the top of the slide rail;

[0016] The slider is connected to the bottom of the movable base.

[0017] Preferably, the placement assembly includes a test frame and a sealing cover, the test frame being mounted at the top center of the movable base, and the sealing cover covering the top of the test frame;

[0018] The test frame has an opening at the top for easy placement of filter capacitors, and an external wiring connector is provided on the test frame for auxiliary wiring connections.

[0019] Preferably, the caliper assembly includes a mounting structure and a vernier caliper, the mounting structure being used to mount the vernier caliper on top of the movable base;

[0020] The vernier caliper can be adjusted at the top of the mounting structure as needed.

[0021] Preferably, the linkage assembly includes a rotating structure and a linkage rod, wherein the rotating structure is used to rotatably connect both ends of the linkage rod between the bracket and the movable base;

[0022] The length of the linkage can be adjusted according to needs.

[0023] The clamping structure has a removable silicone cushioning pad attached to its inner side. The top surface of the caliper assembly is engraved with a travel scale along the sliding direction. The dovetail groove smooth table has removable multi-position limit bars at both ends.

[0024] Preferably, quick-release components are installed on adjacent sides of the two mounting brackets, and a protective frame is installed between the two quick-release components.

[0025] Preferably, the quick-release assembly includes a limiting frame and a docking bracket, the limiting frame being installed on one side of the mounting bracket and the docking bracket being installed on both sides of the protective frame.

[0026] Compared with related technologies, the CRH1 type EMU filter capacitor deformation testing fixture provided by the present invention has the following advantages:

[0027] This invention provides a testing fixture for the deformation of filter capacitors in CRH1 high-speed trains. Through a bracket, linkage components, sliding components, laser measurement components, and caliper components, it achieves full-area surface scanning of the filter capacitor, accurately capturing the maximum bulge point. This solves the problems of incomplete data and missed faults in manual single-line measurements. The dovetail groove smooth table, combined with a clamping structure, standardizes workpiece positioning, eliminating manual operation reference deviations. Uniform clamping force ensures non-destructive clamping. It is compatible with the entire CRH1 series of capacitors, allowing for multi-point measurement with a single clamping without repeated disassembly and assembly. The vernier caliper provides direct digital reading, with a system error controlled within 0.1mm, eliminating the 3mm average reading error of manual methods. This avoids material loss due to misjudgment and replacement of filter capacitors. A single operator can complete the testing of a trainset in one hour, increasing efficiency by 300% compared to the original 2-person 6-hour operation mode. The handle facilitates on-site transport, and the laser lines are clear even in low-light conditions. The equipment can be used without professional training. The manufacturing cost of the fixture is lower than the replacement loss of a single capacitor (over 20,000 yuan). Repeated measurement data is stable with no discrete deviation, balancing testing accuracy, operational efficiency, and maintenance economy. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the first embodiment of the CRH1 type EMU filter capacitor deformation testing fixture provided by the present invention.

[0029] Figure 2 A schematic diagram of the laser testing equipment is provided for this invention;

[0030] Figure 3 A schematic diagram of the threaded hole is provided for this invention;

[0031] Figure 4 Provided for the present invention Figure 2 An enlarged view of point A shown;

[0032] Figure 5 Provided for the present invention Figure 2 An enlarged view of point B shown;

[0033] Figure 6 Provided for the present invention Figure 2 An enlarged view of point C shown;

[0034] Figure 7 This is a schematic diagram of the second embodiment of the CRH1 type EMU filter capacitor deformation testing fixture provided by the present invention.

[0035] Figure 8 Provided for the present invention Figure 7 A magnified view of point D shown.

[0036] The diagram labels are as follows: 1. Bracket; 2. Linkage assembly; 201. Rotating structure; 202. Linkage rod; 3. Sliding assembly; 301. Stabilizing base; 302. Slide rail; 303. Slider; 4. Dovetail groove smooth table; 401. Base frame; 402. Dovetail groove guide rail; 403. Adjusting handwheel; 404. Precision screw; 405. Threaded hole; 406. Adjusting base; 407. Locking structure; 5. Clamping structure; 6. Laser measurement assembly, 601, mounting bracket, 602, connecting cable, 603, fixed base, 604, laser testing equipment, 7, placement assembly, 701, test frame, 702, sealing cover, 8, handle, 9, quick release assembly, 901, limit frame, 902, docking frame, 10, caliper assembly, 101, mounting structure, 102, vernier caliper, 11, filter capacitor, 12, protective frame, 13, movable base. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] First Embodiment

[0039] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 ,in, Figure 1 This is a schematic diagram of the first embodiment of the CRH1 type EMU filter capacitor deformation testing fixture provided by the present invention. Figure 2 A schematic diagram of the laser testing equipment is provided for this invention; Figure 3 A schematic diagram of the threaded hole is provided for this invention; Figure 4 Provided for the present invention Figure 2 An enlarged view of point A shown; Figure 5 Provided for the present invention Figure 2 An enlarged view of point B shown; Figure 6 Provided for the present invention Figure 2 The enlarged view at point C is shown. The CRH1 type EMU filter capacitor deformation test fixture includes: bracket 1;

[0040] Two sliding components 3 are mounted on the top of the bracket 1, and a dovetail groove smooth table 4 is mounted on the top of the bracket 1.

[0041] The movable base 13 is installed on top of the sliding assembly 3 and the dovetail groove smooth table 4. A laser measuring assembly 6 is installed on the top of the movable base 13. Multiple caliper assemblies 10 are installed on the top of the movable base 13. A placement assembly 7 is installed on the top of the movable base 13. A filter capacitor 11 is provided inside the placement assembly 7.

[0042] Two handles 8 are mounted on the top of the movable base 13;

[0043] The bracket 1 is milled from aluminum alloy profiles. Rust-proof sealant must be evenly applied to the gaps between the profile joints to prevent moisture from penetrating the internal guide rail structure. After the two sets of sliding components 3 are assembled onto the top surface of the bracket 1, special low-viscosity guide rail grease must be added. Each lubrication interval should be controlled to once a week; ordinary grease is prohibited to prevent abnormal damping from affecting the 2D scanning accuracy. When assembling the dovetail groove smooth table 4 with the threaded connection holes of the bracket 1, all connections are secured with anti-loosening spring washers. If the device is not in use for an extended period, the sliding clearance of the slide table should be re-measured every half month. If any shaking occurs, the threaded connections should be tightened immediately. Standard mounting holes are reserved at the connection points between the movable base 13 and the sliding components 3 and the dovetail groove smooth table 4, allowing for the addition of external data recorders as needed. The recording module is not pre-installed with this expansion accessory. The cables of the laser measurement component 6 and the caliper component 10 are uniformly arranged along the side groove of the movable base 13. Rubber protective rings are set at both ends of the groove to prevent the cables from bending and wearing. A removable silicone pad can be added to the inside of the placement component 7 as needed to accommodate filter capacitors 11 with different shapes and curvatures. Two sets of handles 8 are fixed to the top surface of the movable base 13 with countersunk screws. When transporting the tooling, only handles 8 can be held to apply force. It is forbidden to lift the laser measurement component 6, caliper component 10 and other precision measuring components. The tooling should be stored in a dry and dustproof storage cabinet for a long time. After the on-site operation is completed, clean the metal debris and dust inside the placement component 7 in time to prevent particles from getting stuck in the sliding track of the dovetail groove smooth table 4.

[0044] Please refer to Figure 1 and Figure 2 The laser measurement assembly 6 includes two mounting brackets 601, a connecting cable 602, two fixed bases 603, and two laser testing devices 604. The two mounting brackets 601 are used to mount the fixed bases 603 on the top of the movable base 13 near one side. The laser testing devices 604 are mounted on one side of the fixed bases 603. The connecting cable 602 is connected to the interface of the laser testing devices 604.

[0045] The other end of the connecting wire 602 is connected to the caliper assembly 10.

[0046] Please refer to Figure 1 and Figure 3 The dovetail groove smooth table 4 includes a base frame 401, a dovetail groove guide rail 402, an adjusting handwheel 403, a precision screw 404, a threaded hole 405, an adjusting base 406, and a locking structure 407. The dovetail groove guide rail 402 is used to slide the adjusting base 406 on the top of the base frame 401. The precision screw 404 is used to install the adjusting handwheel 403 on one side of the dovetail groove guide rail 402. The locking structure 407 is installed on one side of the base frame 401. The threaded hole 405 is opened on the top of the adjusting base 406.

[0047] One end of the precision screw 404 is connected to the adjusting base 406, and the locking structure 407 is positioned corresponding to the adjusting base 406.

[0048] Please refer to Figure 2 and Figure 4 The sliding assembly 3 includes a stabilizing base 301, a slide rail 302, and a slider 303. The stabilizing base 301 is used to mount the slide rail 302 on the top of the bracket 1, and the slider 303 is slidably connected to the top of the slide rail 302.

[0049] The bottom of the slider 303 is connected to the movable base 13.

[0050] Please refer to Figure 2 and Figure 5 The placement assembly 77 includes a test frame 701 and a sealing cover 702. The test frame 701 is installed at the top center of the movable base 13, and the sealing cover 702 is used to cover the top of the test frame 701.

[0051] The test frame 701 has an opening at the top for easy placement of the filter capacitor 11. The test frame 701 is equipped with an external line connector for auxiliary line connection.

[0052] Please refer to Figure 2 and Figure 6 The caliper assembly 10 includes a mounting structure 101 and a vernier caliper 102, wherein the mounting structure 101 is used to mount the vernier caliper 102 on the top of the movable base 13;

[0053] The vernier caliper 102 can be adjusted in position on top of the mounting structure 101 as needed.

[0054] Please refer to Figure 2 and Figure 6 The linkage component 2 includes a rotating structure 201 and a linkage rod 202. The rotating structure 201 is used to rotatably connect the two ends of the linkage rod 202 between the bracket 1 and the movable base 13.

[0055] The linkage rod 202 can be adjusted in length according to needs.

[0056] The clamping structure 5 has a removable silicone buffer pad attached to its inner side. The top surface of the caliper assembly 10 is engraved with a travel scale along the sliding direction. The dovetail groove smooth table 4 has removable multi-position limit bars at both ends.

[0057] The silicone cushioning pad is fixed to the inner wall of the contour clamping device by Velcro, and the limiting stop is locked to the dovetail groove smooth table by threaded hole.

[0058] The working principle of the CRH1 type EMU filter capacitor deformation testing fixture provided by this invention is as follows:

[0059] Before operation, the entire machine is calibrated using standard gauge blocks. The gauge blocks are placed on the adjusting base 406 of the dovetail groove smooth table 4. The pitch angle of the laser measuring component 6 is finely adjusted to ensure the laser beam path is parallel to the measuring axis of the vernier caliper 102 of the caliper component 10. The vernier caliper 102 is zeroed and verified, and the overall machine error is controlled within 0.1mm. After calibration, the filter capacitor 11 is placed above the placement component 7 and the adjusting base 406. The adjusting handwheel 403 is rotated to drive the precision screw 404, causing the dovetail groove guide rail 402 to move along the base frame 401, pushing the clamping structure 5 to fit against the side wall of the filter capacitor 11. The locking structure 407 is tightened to fix the sliding stroke. The threaded hole 405 is used to lock the clamping structure 5, unifying the workpiece measurement reference. The operator can then directly... The sliding component 3 moves laterally along the bracket 1. The linkage component 2 connects the two sliding components 3 to ensure synchronous left and right displacement. The laser measuring component 6 and the caliper component 10 move synchronously with the sliding component 3. The caliper component 10 fixes the vernier caliper 102 with the mounting structure 101. The laser measuring component 6 projects the reference line to cover the entire curved surface of the filter capacitor 11. The bulging of the capacitor will change the laser reference height. The displacement difference is fed back to the vernier caliper 102 in real time. During the full-area scanning process, the extreme value of the value is read to accurately lock the position of the maximum bulge. After the test is completed, the locking structure 407 is released, the adjusting handwheel 403 is rotated in the opposite direction to release the clamping structure 5, the filter capacitor 11 is removed, the sliding component 3 is reset, and the handle 8 is used for the overall transportation of the tooling to complete a single complete test process.

[0060] Compared with related technologies, the CRH1 type EMU filter capacitor deformation testing fixture provided by the present invention has the following advantages:

[0061] The system utilizes a bracket 1, linkage component 2, and sliding component 3 in conjunction with a laser measurement component 6 and caliper component 10 to achieve full-area surface scanning of the filter capacitor 11. This allows for precise capture of the maximum bulge point, resolving issues such as incomplete data and missed detections caused by manual single-line measurement. The dovetail groove smooth table 4, combined with the clamping structure 5, standardizes workpiece positioning, eliminating manual operation reference deviations. Uniform clamping force ensures non-destructive clamping, adapting to the entire CRH1 series of capacitors. Multiple measurements can be performed with a single clamping without repeated disassembly and assembly. The vernier caliper 102 provides direct digital reading, with a system error controlled within 0.1mm, eliminating the 3mm average reading error of manual operation. This prevents material loss due to misjudgment and replacement of filter capacitors. A single operator can complete the inspection of a set of vehicles in one hour, increasing efficiency by 300% compared to the original 2-person, 6-hour operation mode. The handle 8 facilitates on-site transport. Laser lines are clear even in low-light conditions. The equipment requires no professional training to operate, and the tooling manufacturing cost is lower than the replacement loss of a single capacitor (over 20,000 yuan). Repeated measurement data is stable with no discrete deviations, balancing detection accuracy, operational efficiency, and maintenance economy.

[0062] Second Embodiment

[0063] Please refer to the following: Figures 7-8 , Figure 7 This is a schematic diagram of the second embodiment of the CRH1 type EMU filter capacitor deformation testing fixture provided by the present invention. Figure 8 Provided for the present invention Figure 7 The enlarged view at point D shows a different CRH1 high-speed train filter capacitor deformation testing fixture based on the first embodiment of this application. The second embodiment of this application proposes another CRH1 high-speed train filter capacitor deformation testing fixture. The second embodiment is merely a preferred embodiment of the first embodiment, and its implementation will not affect the independent implementation of the first embodiment.

[0064] Specifically, the difference between the CRH1 type EMU filter capacitor deformation testing fixture provided in the second embodiment of this application and the following is noted: Please refer to... Figure 7 Each of the two mounting brackets 601 is equipped with a quick-release assembly 9 on one of their adjacent sides, and a protective frame 12 is installed between the two quick-release assemblies 9.

[0065] The protective frame 12 covers the top of the movable base 13.

[0066] Please refer to Figure 7 and Figure 8 The quick-release assembly 9 includes a limiting frame 901 and a docking frame 902. The limiting frame 901 is installed on one side of the mounting frame 601, and the docking frame 902 is installed on both sides of the protective frame 12.

[0067] The limiting frame 901 has openings on the top and one side, and the docking bracket 902 is T-shaped and snaps into the top of the limiting frame 901.

[0068] Compared with related technologies, the CRH1 type EMU filter capacitor deformation testing fixture provided by the present invention has the following advantages:

[0069] To provide protection for the caliper assembly 10 and the placement assembly 7 when not in use, quick-release components 9 are installed on the adjacent side walls of the two mounting brackets 601. The two sets of quick-release components 9 are arranged symmetrically. The protective frame 12 is detachably installed between the two sets of quick-release components 9. After the tooling has completed the inspection operation and the caliper assembly 10 and placement assembly 7 are no longer in use, the operator aligns the two ends of the protective frame 12 and snaps it into the quick-release components 9 on both sides of the mounting brackets 601. The quick-release components 9 enable the protective frame 12 to be quickly positioned and locked in place, ensuring that the protective frame 12 completely covers the outside of the caliper assembly 10 and the placement assembly 7, isolating these two core components from the external environment. When performing capacitance testing, the protective frame 12 can be quickly removed from the quick-release assembly 9 by simply pulling it outwards. This does not occupy the operating space for workpiece clamping and scanning measurement. The structure relies on the quick-release assembly 9 to achieve quick assembly and disassembly of the protective frame 12. In the idle state, the protective frame 12 isolates dust, bumps, and scratches, preventing wear and dust accumulation on the vernier measuring component of the caliper assembly 10 and the bearing platform of the placement assembly 7. This reduces the probability of failure of precision measuring components and extends the service life of the caliper assembly 10 and the placement assembly 7. The disassembly and assembly operations are simple and do not change the original measuring and clamping main structure of the tooling. It is suitable for on-site storage and transportation conditions in the EMU depot.

[0070] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A fixture for testing the deformation of filter capacitors in CRH1 type high-speed trains, characterized in that, include: Support (1); Two sliding components (3) are mounted on the top of the bracket (1), and a dovetail groove smooth table (4) is mounted on the top of the bracket (1). A movable base (13) is installed on top of a sliding assembly (3) and a dovetail groove smooth table (4). A laser measuring assembly (6) is installed on the top of the movable base (13). Multiple caliper assemblies (10) are installed on the top of the movable base (13). A placement assembly (7) is installed on the top of the movable base (13). A filter capacitor (11) is provided inside the placement assembly (7). Two handles (8) are mounted on top of the movable base (13).

2. The CRH1 type EMU filter capacitor deformation testing fixture according to claim 1, characterized in that, The laser measurement assembly (6) includes two mounting brackets (601), a connecting cable (602), two fixed bases (603), and two laser testing devices (604). The two mounting brackets (601) are used to mount the fixed bases (603) on the top of the movable base (13) near one side. The laser testing devices (604) are mounted on one side of the fixed bases (603). The connecting cable (602) is connected to the interface of the laser testing devices (604).

3. The CRH1 type EMU filter capacitor deformation testing fixture according to claim 1, characterized in that, The dovetail groove smooth table (4) includes a base frame (401), a dovetail groove guide rail (402), an adjusting handwheel (403), a precision screw (404), a threaded hole (405), an adjusting base (406), and a locking structure (407). The dovetail groove guide rail (402) is used to slide the adjusting base (406) on the top of the base frame (401). The precision screw (404) is used to install the adjusting handwheel (403) on one side of the dovetail groove guide rail (402). The locking structure (407) is installed on one side of the base frame (401). The threaded hole (405) is opened on the top of the adjusting base (406).

4. The CRH1 type EMU filter capacitor deformation testing fixture according to claim 1, characterized in that, The sliding assembly (3) includes a stabilizing base (301), a slide rail (302) and a slider (303). The stabilizing base (301) is used to mount the slide rail (302) on the top of the bracket (1), and the slider (303) is slidably connected to the top of the slide rail (302).

5. The CRH1 type EMU filter capacitor deformation testing fixture according to claim 1, characterized in that, The placement assembly (77) includes a test frame (701) and a sealing cover (702), the test frame (701) being mounted at the top center of the movable base (13), and the sealing cover (702) covering the top of the test frame (701).

6. The CRH1 type EMU filter capacitor deformation testing fixture according to claim 1, characterized in that, The caliper assembly (10) includes a mounting structure (101) and a vernier caliper (102), the mounting structure (101) being used to mount the vernier caliper (102) on top of the movable base (13).

7. The CRH1 type EMU filter capacitor deformation testing fixture according to claim 1, characterized in that, The linkage component (2) includes a rotating structure (201) and a linkage rod (202). The rotating structure (201) is used to rotatably connect the two ends of the linkage rod (202) between the bracket (1) and the movable base (13).

8. The CRH1 type EMU filter capacitor deformation testing fixture according to claim 1, characterized in that, The clamping structure (5) has a removable silicone buffer pad attached to its inner side. The top surface of the caliper assembly (10) is engraved with a travel scale along the sliding direction. The dovetail groove smooth table (4) has removable multi-position limit bars at both ends.

9. The CRH1 type EMU filter capacitor deformation testing fixture according to claim 2, characterized in that, Each of the two mounting brackets (601) has a quick-release assembly (9) installed on one side of each other, and a protective frame (12) is installed between the two quick-release assemblies (9).

10. The CRH1 type EMU filter capacitor deformation testing fixture according to claim 9, characterized in that, The quick-release assembly (9) includes a limiting frame (901) and a docking frame (902). The limiting frame (901) is installed on one side of the mounting frame (601), and the docking frame (902) is installed on both sides of the protective frame (12).

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