Auxiliary tool for measuring elastic force of grounding device of square platform motor train unit

Abstract

The utility model discloses an elastic force measurement auxiliary tool for a grounding device of a square platform motor train unit. The elastic force measurement auxiliary tool comprises a reference positioning device, an anti-falling measuring block and a fixing screw, the reference positioning device comprises a reference size positioning plate, a U-shaped fixed clamping seat contact plate and a clamping seat bottom plate; the reference size positioning plate is integrally connected with the clamping seat bottom plate, and positioning holes for the fixing screws to penetrate through are formed in the reference size positioning plate; a limiting hole is formed in the middle of the U-shaped fixed clamping seat contact plate; the anti-drop measuring block is of a hollow cylindrical structure, one end of the cylindrical structure is provided with an anti-drop alignment port, and the other end of the cylindrical structure is provided with a fastening interface; the tail end of the anti-falling measuring block extends out of the limiting hole and the left-right floating deviation distance is limited by the limiting hole; the contact area with the grounding carbon brush device during measurement is increased, accurate butt joint can be achieved during measurement, falling is not prone to occurring, measurement is more accurate and stable, original repeated measurement reading is changed into single-time accurate measurement, and work efficiency is improved.

Description

Technical Field

[0001] The utility model relates to an auxiliary tool for measuring elastic force, in particular to an auxiliary tool for measuring elastic force used for a grounding device of a four-way platform EMU. Background Art

[0002] The gearbox grounding device is an important component of the EMU. The internal grounding carbon brush plays the role of insulation coupling and power supply, and the core component of controlling the carbon brush is an elastic device. The failure of the elastic force will cause the carbon brush to be suspended in the air, causing the axle and wheel to short-circuit, so that the contact network forms a contact return on the rail and cause a short circuit, which will cause insulator blasting, traction, conversion, motor, gearbox and other components to be damaged or cause the EMU to burn. Therefore, the inspection requirements and standards of the gearbox grounding device are extremely high, and no potential risks can occur.

[0003] Generally, in the 600,000-kilometer special maintenance, it is necessary to inspect the elastic force of the grounding carbon brush compression spring. However, during the on-site measurement, it was found that the measuring head of the electronic dynamometer was round, while the grounding carbon brush device connector was square. The electronic dynamometer was needed to hold the grounding carbon brush device connector to apply pressure to it for measurement. However, there was very little contact surface between the two, and they could not be accurately docked during measurement, which could easily cause them to fall off, resulting in failure to measure or inaccurate numerical measurements, or multiple measurements. This poses a greater risk to the operation of the EMU, brings inconvenience to maintenance personnel, and seriously affects work efficiency. To address this issue, we decided to develop and produce a square platform EMU grounding device elastic force measurement auxiliary tooling. Utility Model Content

[0004] In order to solve this technical problem, the utility model aims to solve the problem of potential safety hazards in EMUs, EMU operation risks and serious impact on operating efficiency caused by the inability of the grounding carbon brush measuring instrument to measure or inaccurate numerical measurements, or multiple measurements of the elastic force value of the grounding carbon brush device.

[0005] The technical solution adopted by the utility model is: an auxiliary tooling for measuring the elastic force of the grounding device of a square platform EMU, comprising a reference positioning device, an anti-drop measuring block, and fixing screws;

[0006] The reference positioning device comprises a reference size positioning plate, a U-shaped fixed card seat contact plate, and a card seat bottom plate; the reference size positioning plate is integrally connected with the card seat bottom plate, and positioning holes for fixing screws to pass through are opened on the reference size positioning plate, and a plurality of positioning holes just fit with the threaded holes on the back of the grounding carbon brush measuring instrument, and the fixing screws can be screwed into the threaded holes on the back of the grounding carbon brush measuring instrument after passing through the positioning holes to fix the grounding carbon brush measuring instrument; the width of the card seat bottom plate is greater than the width of the reference size positioning plate, and the U-shaped fixed card seat contact plate is arranged in the vertical direction of the other end of the card seat bottom plate; a limiting hole is arranged in the middle of the U-shaped fixed card seat contact plate;

[0007] The anti-slip measuring block is a cylindrical structure with a hollow interior, one end of the cylindrical structure is provided with an anti-slip alignment port, and the other end is provided with a fastening interface; the fastening interface is a circular internal threaded structure that can be connected to the bolts on the grounding carbon brush measuring instrument; the anti-slip alignment port is square and has a square recessed structure inside that can be connected to the square head of the EMU grounding carbon brush device. When in use, one end of the anti-slip measuring block is installed on the measuring head of the grounding carbon brush measuring instrument, and the other end is used to support the measuring grounding carbon brush device for measurement. The end of the anti-slip measuring block is limited by a limiting hole to limit the distance of its left and right floating deviation.

[0008] Furthermore, the reference size positioning plate and the base plate of the card seat are both rectangular structures, and the reference size positioning plate fits the size of the grounding carbon brush measuring instrument C.

[0009] Furthermore, the inner side of the U-shaped fixed card seat contact plate is also provided with an anti-deformation reinforcement block for strengthening and fixing the U-shaped fixed card seat;

[0010] Furthermore, the anti-deformation reinforcement block is rectangular or triangular.

[0011] Furthermore, an arc-shaped hole is provided at the connection between the reference size positioning plate and the base plate.

[0012] Furthermore, the fixing screw is a circular flat structure at the top and a threaded structure at the bottom.

[0013] Furthermore, the limiting hole is U-shaped, and the bottom of the U is an arc.

[0014] Furthermore, an extension plate is provided at the lower end of the U-shaped fixed card seat contact plate to support the outer peripheral shell of the square head of the EMU grounding carbon brush device, and the extension plate is a rectangular plate structure extending horizontally forward.

[0015] The beneficial effects and features of the utility model are:

[0016] 1. The utility model of the four-square platform EMU grounding device elastic force measurement auxiliary tooling, by setting the reference size positioning plate, limit holes and anti-drop measuring blocks of specific structure and length, can directly and accurately measure with its own positioning, without the need for alignment measurement; the original multiple measurement readings are changed into a single accurate measurement, which improves work efficiency.

[0017] 2. The utility model of the four-square platform EMU grounding device elastic force measurement auxiliary tooling increases the contact area with the grounding carbon brush device during measurement by setting a U-shaped fixed card seat contact plate and an extension plate, so that the measurement can be accurately connected and not easy to fall off, and the measurement is more accurate and stable.

[0018] 3. The utility model of the auxiliary tooling for measuring the elastic force of the grounding device of the Sifang platform EMU is suitable for measuring the same type of carbon brush compression springs of multiple models of the Sifang platform, and can be promoted to all units of the railway that include Sifang platform EMUs, and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the utility model;

[0020] Figure 2 This is a schematic structural diagram of an anti-drop measuring block at one angle in a preferred embodiment of the utility model;

[0021] Figure 3 yes Figure 2 A schematic diagram of the structure from another angle;

[0022] Figure 4 It is a schematic diagram of the overall structure of a preferred embodiment of the utility model (bottom structure);

[0023] Figure 5 yes Figure 4 The schematic diagram of the structure is enlarged at the dotted line;

[0024] Figure 6 It is a schematic diagram of the connection between the elastic column and the anti-dropout alignment port of the anti-dropout measuring block 2 in a preferred embodiment of the utility model;

[0025] Figure 7 It is a schematic diagram of the use of a preferred embodiment of the utility model;

[0026] Figure 8 This is a schematic diagram of the use of a preferred embodiment of the utility model (with an overhanging plate);

[0027] The meanings of the accompanying numbers are as follows: 1-reference positioning device, 2-anti-slip measuring block, 3-fixing screw, 4-arc hole, 11-reference dimension positioning plate, 12-U-shaped fixed card seat contact plate, 13-anti-deformation reinforcement block, 14-card seat bottom plate, 111-positioning hole, 121-limiting hole, 21-anti-slip alignment port, 22-fastening interface, 23-extending plate; A-elastic column, B-peripheral shell plane, D-test head of the grounding carbon brush measuring instrument. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings:

[0029] Please refer to Figure 1 to Figure 3 , an auxiliary tooling for measuring elastic force of a grounding device of a four-sided platform EMU, comprising a reference positioning device 1, an anti-drop measuring block 2, and a fixing screw 3;

[0030] The reference positioning device 1 includes a reference size positioning plate 11, a U-shaped fixed card seat contact plate 12, and a card seat bottom plate 14; the reference size positioning plate 11 is integrally connected with the card seat bottom plate 14, and both the reference size positioning plate 11 and the card seat bottom plate 14 are rectangular structures, and the reference size positioning plate 11 fits the size of the grounding carbon brush measuring instrument C. The reference size positioning plate 11 is provided with a positioning hole 111 for the fixing screw 3 to pass through, and a plurality of positioning holes 111 just fit with the threaded holes on the back of the grounding carbon brush measuring instrument. After the fixing screw 3 passes through the positioning hole 111, it can be screwed into the threaded hole on the back of the grounding carbon brush measuring instrument and fix the grounding carbon brush measuring instrument; the width of the card seat bottom plate 14 is greater than the width of the reference size positioning plate 11, and the U-shaped fixed card seat contact plate 12 is arranged in the vertical direction of the other end of the card seat bottom plate 14; a limiting hole 121 is arranged in the middle of the U-shaped fixed card seat contact plate 12;

[0031] The anti-slip measuring block 2 is a cylindrical structure with a hollow interior, one end of the cylindrical structure is provided with an anti-slip alignment opening 21, and the other end is provided with a fastening interface 22; the fastening interface 22 is a circular internal threaded structure that can be connected to the bolts on the grounding carbon brush measuring instrument so that the fastening interface 22 is tightly connected to the grounding carbon brush measuring instrument; the anti-slip alignment opening 21 is square with a square recessed structure inside, which can be connected to the square head of the EMU grounding carbon brush device. When in use, one end of the anti-slip measuring block 2 is installed on the measuring head of the grounding carbon brush measuring instrument, and the other end is used to support the measuring grounding carbon brush device for measurement. At this time, the outer side surface of the U-shaped fixed socket contact plate 12 is in contact with the plane of the outer peripheral shell of the square head of the EMU grounding carbon brush device, thereby increasing the contact area; the end of the anti-slip measuring block 2 extends out of the limit hole 121 and is limited by the limit hole 121 to limit the distance of its left and right floating deviation. Specifically, the limiting hole 121 is U-shaped, and the bottom of the U-shape is an arc, and the arc diameter is preferably 13-17 cm, which is slightly larger than the outer contour of the anti-slip measuring block 2 to limit the distance of its left and right floating deviation. The end of the square head of the EMU grounding carbon brush device can be extended into the anti-slip alignment opening 21 of the anti-slip measuring block 2.

[0032] As a preferred solution, an anti-deformation reinforcement block 13 is further provided on the inner side of the U-shaped fixed base contact plate 12; the anti-deformation reinforcement block 13 is rectangular or triangular and is used to strengthen and fix the U-shaped fixed base 12, increase its pressure resistance, and prevent it from deforming and tilting.

[0033] Please refer to Figure 4 , Figure 5 As a preferred solution, in order to reduce stress concentration, an arc hole 4 is provided at the connection between the reference size positioning plate 11 and the base bottom plate 14.

[0034] As a preferred solution, the fixing screw 3 is a circular flat upper portion and a threaded structure at the bottom. The flat upper portion can remain flat with the plane of the reference positioning device 1 to prevent excessive protrusions from causing risks of personal injury.

[0035] As a preferred solution, in order to further increase the contact area with the EMU grounding carbon brush device, the lower end of the U-shaped fixed socket contact plate 12 is provided with an extension plate 23 that supports the outer peripheral shell of the square head of the EMU grounding carbon brush device. The extension plate 23 is a rectangular plate structure extending horizontally forward.

[0036] Specific usage:

[0037] Preparation: Before measuring the elastic force of the grounding carbon brush, place the grounding carbon brush measuring instrument (electronic dynamometer) on the reference positioning device 1, that is, the reference size positioning plate 11, and then fix it with the fixing screw 3, and then tighten the round head of the anti-drop measuring block 2, that is, the fastening interface 22, with the test head D of the grounding carbon brush measuring instrument through the threaded device, rotate and tighten, and start measuring after the installation is completed;

[0038] Measurement method: Please refer to Figure 6 , Figure 7 , turn on the power switch of the grounding carbon brush measuring instrument, use the assembled grounding carbon brush measuring instrument and auxiliary tooling to align the elastic column A (that is, the square head of the grounding carbon brush device) of the workpiece to be measured, and use your hand to press the front end of the reference positioning device 1 into contact with the end face of the measured workpiece (that is, the outer side surface of the U-shaped fixed seat contact plate 12 mentioned above and the outer peripheral shell plane B of the square head of the EMU grounding carbon brush device are in contact. The outer peripheral shell is schematically shown in the figure, and the internal structure is not drawn. If an extension plate 23 is provided, the extension plate 23 is also in contact with the lower end face of the outer peripheral shell of the square head of the EMU grounding carbon brush device, which further increases the contact area and makes the measurement more stable). At this time, the end of the elastic column A of the EMU grounding carbon brush device can be extended into the anti-detachment alignment port 21 of the anti-detachment measuring block 2, press the measuring button of the grounding carbon brush measuring instrument, and then read and record the displayed data of the grounding carbon brush measuring instrument.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the description only illustrate the structural relationship and principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An auxiliary tool for measuring the elastic force of the grounding device of a four-sided platform EMU, characterized in that , comprising a reference positioning device (1), an anti-drop measuring block (2), and a fixing screw (3); The reference positioning device (1) comprises a reference dimension positioning plate (11), a U-shaped fixed card seat contact plate (12), and a card seat bottom plate (14); the reference dimension positioning plate (11) is integrally connected to the card seat bottom plate (14); a positioning hole (111) is provided on the reference dimension positioning plate (11) for a fixing screw (3) to pass through; the plurality of positioning holes (111) fit exactly with the threaded holes on the back of the grounding carbon brush measuring instrument; the fixing screws (3) can be screwed into the threaded holes on the back of the grounding carbon brush measuring instrument after passing through the positioning holes (111) to fix the grounding carbon brush measuring instrument; the width of the card seat bottom plate (14) is greater than the width of the reference dimension positioning plate (11); the U-shaped fixed card seat contact plate (12) is arranged in the vertical direction of the other end of the card seat bottom plate (14); a limiting hole (121) is arranged in the middle of the U-shaped fixed card seat contact plate (12); The anti-slip measuring block (2) is an internally hollow cylindrical structure, one end of the cylindrical structure is provided with an anti-slip alignment opening (21), and the other end is provided with a fastening interface (22); the fastening interface (22) is a circular internally threaded structure that can be connected to a bolt on a grounding carbon brush measuring instrument; the anti-slip alignment opening (21) is a square internally square recessed structure that can be connected to a square head of a grounding carbon brush device of a train unit. When in use, one end of the anti-slip measuring block (2) is mounted on the measuring head of the grounding carbon brush measuring instrument, and the other end is supported against the grounding carbon brush device for measurement, and the end of the anti-slip measuring block (2) is limited by a limiting hole (121) to limit the distance of its left and right floating deviation.

2. The auxiliary tooling for measuring elastic force of the grounding device of the Sifang platform EMU according to claim 1 is characterized in that The reference size positioning plate (11) and the base plate (14) are both rectangular structures, and the reference size positioning plate (11) fits the size of the grounding carbon brush measuring instrument (C).

3. The auxiliary tooling for measuring elastic force of the grounding device of the Sifang platform EMU according to claim 1 is characterized in that The inner side of the U-shaped fixed card seat contact plate (12) is also provided with an anti-deformation reinforcement block (13) for reinforcing and fixing the U-shaped fixed card seat contact plate (12).

4. The auxiliary tooling for measuring elastic force of the grounding device of the Sifang platform EMU according to claim 3 is characterized in that The anti-deformation reinforcement block (13) is rectangular or triangular.

5. The auxiliary tooling for measuring elastic force of the grounding device of the Sifang platform EMU according to claim 1 is characterized in that An arc-shaped hole (4) is provided at the connection between the reference dimension positioning plate (11) and the base bottom plate (14).

6. The auxiliary tooling for measuring elastic force of the grounding device of the Sifang platform EMU according to claim 1 is characterized in that The fixing screw (3) is a circular flat structure at the top and a threaded structure at the bottom.

7. The auxiliary tooling for measuring elastic force of the grounding device of a four-way platform EMU according to any one of claims 1 to 6 is characterized in that The limiting hole (121) is U-shaped, and the bottom of the U-shape is an arc.

8. The auxiliary tooling for measuring elastic force of the grounding device of a four-way platform EMU according to any one of claims 1 to 6 is characterized in that The lower end of the U-shaped fixed card seat contact plate (12) is provided with an extension plate (23) that supports the outer peripheral shell of the square head of the EMU grounding carbon brush device. The extension plate (23) is a rectangular plate structure that extends horizontally forward.

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