Motor train unit door fine adjustment size measuring device

Abstract

The utility model discloses a motor train unit door fine adjustment dimension measuring device, which comprises a lower swing arm and slide way measuring piece, a balance pinch roller measuring piece and a lower stop pin measuring piece, one end of the lower swing arm and slide way measuring piece is provided with a first through hole, the width of the other end is 5.5 mm, and the width is gradually increased by 1mm in the direction towards the first through hole to form a three-stage stepped structure; a first gap module, a second gap module and a third gap module which are sequentially connected along a straight line are arranged at one end of the balance pinch roller measuring piece, and the widths are sequentially 1mm, 2mm and 3mm; a fourth gap module with the width of 3mm is arranged at the other end; a first bottom distance measuring module and a second bottom distance measuring module which are parallel to each other are arranged at the two ends of the lower stop pin measuring piece in an upward protruding mode respectively, the width of the second bottom distance measuring module is uniform and is 3 mm, and the width of the bottom end of the first bottom distance measuring module is 2 mm and is sequentially increased to 3 mm from top to bottom. When the accurate adjustment size of the motor train unit door is measured, whether the installation size of each part of the door meets the requirement or not can be conveniently detected, and the detection efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of inspection and maintenance, and in particular relates to a device for measuring the fine adjustment dimensions of a motor vehicle door. Background Art

[0002] Currently, intercity EMUs require precise dimensional measurement of their exterior doors after a typical mileage of 60,000 ± 600 km or 60 days. Alternatively, if door malfunctions are discovered during daily operation, precise dimensional measurement is performed to verify that the installation dimensions of the various door components meet requirements. During these precise dimensional measurements or inspections, operators must use a combination of tools, including tape measures, stoppers, and Allen wrenches, to measure the installation dimensions of various door components. Existing tools are inconvenient for measuring specific areas, and the combination of multiple tools is inefficient. This increases tool procurement and management costs, and is inconvenient for on-site site clearance management.

[0003] Therefore, a new technology is needed to solve the problem of low efficiency in measuring the fine-tuning dimensions of various components of a vehicle door when fine-tuning the dimensions of the vehicle door in the prior art. Utility Model Content

[0004] In order to solve the above problems in the prior art, the utility model provides a device for measuring the fine-tuning dimensions of EMU doors, which has the effect of high efficiency in measuring the fine-tuning dimensions of various components of the door when fine-tuning the dimensions of the door.

[0005] The utility model adopts the following technical solutions:

[0006] A device for measuring the fine-tuning dimensions of EMU doors includes a lower swing arm and slide measuring piece, a balancing pressure wheel measuring piece, and a lower gear pin measuring piece. The lower swing arm and slide measuring piece has a first through hole at one end and a 5.5 mm width at the other end. The width gradually increases by 1 mm toward the first through hole, forming a three-step structure.

[0007] One end of the balancing wheel measuring piece is provided with a first gap module, a second gap module, and a third gap module connected in a straight line, the widths of the first gap module, the second gap module, and the third gap module are 1mm, 2mm, and 3mm respectively; the other end is provided with a fourth gap module, the width of the fourth gap module is 3mm;

[0008] The two ends of the lower gear pin measuring piece are upwardly protruded with a first bottom distance measuring module and a second bottom distance measuring module which are parallel to each other. The width of the second bottom distance measuring module is uniform in the vertical direction and is 3 mm. The width of the first bottom distance measuring module at the top end is 2 mm, and increases to 3 mm from top to bottom.

[0009] As a further improvement of the technical solution of the present utility model, the length * thickness of the first-level step on the lower swing arm and the slideway measuring piece is 10 mm * 2 mm.

[0010] As a further improvement of the technical solution of the present utility model, the distance between the first through hole and the end where the first-level step is located is 80 mm, and the diameter of the first through hole is 3.5 mm.

[0011] As a further improvement of the technical solution of the present utility model, the balance pressure wheel measuring piece further includes a main board. The main board is in a straight shape and is fixedly connected to the third gap module and the fourth gap module at both ends respectively. The fourth gap module is perpendicular to the main board, and the first gap module, the second gap module, the third gap module, and the main board are connected in sequence along a straight line.

[0012] As a further improvement of the technical solution of the present utility model, the lower stop pin measuring piece further includes a connecting body. The first bottom distance measuring module, the connecting body, and the second bottom distance measuring module are connected in sequence to form a U-shaped opening upward. The midline of the first bottom distance measuring module is parallel to the second bottom distance measuring module, and the cross-section of the first bottom distance measuring module in the vertical direction is an isosceles trapezoid.

[0013] As a further improvement of the technical solution of the present utility model, the first gap module, the second gap module, the third gap module, and the main board are connected in sequence to form an approximate straight shape. The upper end faces of the first gap module, the second gap module, and the third gap module are flush, and the vertical widths between the lower end faces and the upper end faces are 1 mm, 2 mm, and 3 mm in sequence;

[0014] The fourth gap module is vertically arranged and the lower end is fixedly connected to the main board to form an L shape.

[0015] As a further improvement of the technical solution of the present utility model, the lower swing arm and the slideway measuring piece include a first measuring module, a second measuring module, a third measuring module, and a fourth measuring module that are connected in sequence and have flush upper end faces. The widths between the lower end faces and the upper end faces are 5.5 mm, 6.5 mm, 7.5 mm, and 8.5 mm in sequence. The first measuring module forms the first-level step, and the first through hole is located on the fourth measuring module.

[0016] As a further improvement of the technical solution of the present utility model, it further includes a connecting piece. The first through hole can allow the connecting piece to pass through; the main board is provided with a second through hole for the connecting piece to pass through; the connecting body is provided with a third through hole for the connecting piece to pass through.

[0017] As a further improvement of the technical solution of the present invention, along the sequential connection direction of the first measurement module, the second measurement module, the third measurement module and the fourth measurement module, the lengths of the first measurement module, the second measurement module and the third measurement module are all 10 mm.

[0018] As a further improvement of the technical solution of the present utility model, the thickness of the first measurement module, the second measurement module, the third measurement module, and the fourth measurement module in the horizontal cross section is 2 mm.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The EMU door fine-tuning dimension measuring device of this solution has a simple structure and is easy to use. It mainly consists of a lower swing arm and slide measuring piece, a balancing pressure wheel measuring piece, and a lower stop pin measuring piece. The lower swing arm and slide measuring piece includes measuring modules with measuring widths of 5.5mm, 6.5mm, 7.5mm, and 8.5mm, and the lower swing arm height can be measured through the lower swing arm and slide measuring piece. The balancing pressure wheel measuring piece includes gap modules with measuring widths of 1mm, 2mm, and 3mm, and a fourth gap module with a width of 3mm. The balancing pressure wheel measuring piece can be used to measure the gap between the balancing pressure wheel and the wheel groove, and between the pressure wheel and the door leaf. The lower stop pin measuring piece includes measuring modules with widths of 3mm and 2mm, and the lower stop pin bottom distance (vertical gap) can be measured through the lower stop pin measuring piece. During the fine-tuning dimension measurement operation of the intercity EMU door, it can improve the measurement efficiency and accuracy of the operators, facilitate on-site tool management, and thus save maintenance and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technology of the utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the lower swing arm and the slide measuring piece;

[0024] Figure 3 This is a schematic diagram of the structure of the balance wheel measuring component;

[0025] Figure 4 It is a structural diagram of the lower gear pin measuring part;

[0026] Figure 5 This is the case when the lower arm height is measured using the lower arm and slide measuring piece;

[0027] Figure 6This is when the balance wheel measuring piece is used to measure the gap between the balance wheel and the wheel groove, or between the balance wheel and the door leaf.

[0028] Figure 7 This is the situation when the lower stop pin bottom distance is measured using the lower stop pin measuring piece.

[0029] Reference numerals:

[0030] 1-Lower arm and slide measuring piece; 11-First measuring module; 12-Second measuring module; 13-Third measuring module; 14-First through hole; 15-Fourth measuring module;

[0031] 2 - balancing wheel measuring piece; 21 - first gap module; 22 - second gap module; 23 - third gap module; 24 - fourth gap module; 25 - second through hole; 26 - main board;

[0032] 3-lower gear pin measuring piece; 31-second bottom distance measuring module; 32-first bottom distance measuring module; 33-third through hole; 34-connector;

[0033] 4-Connector;

[0034] 5-Lower arm;

[0035] 6-Balance pressure wheel;

[0036] 7-Lower gear pin. DETAILED DESCRIPTION

[0037] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0038] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. In addition, the terms "upper," "lower," "left," and "right" used in this utility model are only used with respect to the relative positions of the components of the utility model in the accompanying drawings.

[0039] Reference Figures 1 to 4A device for measuring the fine-tuning dimensions of EMU doors includes a lower arm and slide measuring piece 1, a balancing roller measuring piece 2, and a lower stop pin measuring piece 3. Each of the lower arm and slide measuring piece 1, the balancing roller measuring piece 2, and the lower stop pin measuring piece 3 are made of wear-resistant material. A first through-hole 14 is provided at one end of the lower arm and slide measuring piece 1, through which the connecting piece 4 passes. The width of the other end is 5.5 mm, and as it approaches the first through-hole 14, the width increases by 1 mm, forming a three-step structure. The balancing roller measuring piece 2 has a first gap module 21, a second gap module 22, and a third gap module 23 fixedly connected in a straight line at one end of the length. A fourth gap module 24 is provided at the other end, perpendicular to the first, second, and third gap modules 21, 22, and 23. The width of the fourth gap module 24 is 3 mm. The widths of the first, second, and third gap modules 21, 22, and 23 are 1 mm, 2 mm, and 3 mm, respectively. The lower pin measuring piece 3 is provided with a first bottom distance measuring module 32 at one end and a parallel second bottom distance measuring module 31 at the other end. The width of the second bottom distance measuring module 31 is uniform and 3 mm. The bottom end width of the first bottom distance measuring module 32 is 2 mm and increases to 3 mm from top to bottom.

[0040] The first through hole 14 is Figure 2 It is located near the right end, with the first step width of 5.5mm and the width of the next two steps increasing by 1mm step by step. The balance roller measuring piece 2 is a 3mm*10mm*2mm variant, with one end being a three-stepped type. The width*length*thickness of the first gap module 21 is 1mm*10mm*2mm, and the width of the next two steps increases by 1mm step by step. The width of the first gap module 21, the second gap module 22, and the third gap module 23 can cover the measurement range of 1mm-3mm. The other end is vertically bent 90° to form the fourth gap module 24. The fourth gap module 24 has a vertical dimension of 20mm and a horizontal cross-section of a 3mm*3mm square. The fourth gap module 24 is in the shape of a rectangular parallelepiped. From the measuring starting point of the outer end of the first gap module 21 to 71.5mm on the main board 26, a second through hole 25 with an inner diameter of 3.5mm and an outer radius of 3.5mm is made.

[0041] Specifically, the side surfaces of the stepped structures on the lower arm and slideway measuring member 1 and the balancing roller measuring member 2, near the bottom end and at the fourth clearance module 24, are laser engraved with corresponding dimensional scales. This allows for intuitive reading of measurement data during measurement, improving door dimensional measurement efficiency. The side surfaces of the first and second base distance measurement modules 32 and 31 on the lower gear pin measuring member 3 are also laser engraved with their corresponding dimensional scales.

[0042] The fine-tuning dimension measuring device for the EMU door of this solution has a simple structure and is easy to use. It mainly consists of a lower swing arm and a slideway measuring part 1, a balance pressure wheel measuring part 2, and a lower stop pin measuring part 3. The lower swing arm and the slideway measuring part 1 include measuring modules with widths of 5.5mm, 6.5mm, 7.5mm, and 8.5mm, and the height of the lower swing arm can be measured through the lower swing arm and the slideway measuring part 1. The balance pressure wheel measuring part 2 includes clearance modules with widths of 1mm, 2mm, and 3mm and a fourth clearance module 24 with a width of 3mm. The clearance between the balance pressure wheel and the wheel groove and the clearance between the pressure wheel and the door leaf can be measured through the balance pressure wheel measuring part 2. The lower stop pin measuring part 3 includes measuring modules with widths of 3mm and 2mm, and the bottom distance (vertical clearance) of the lower stop pin can be measured through the lower stop pin measuring part 3. During the fine-tuning dimension measurement operation of the intercity EMU door, it can improve the measurement work efficiency and accuracy of the operators, facilitate on-site tool management, and thus save maintenance and labor costs.

[0043] Specifically, the distance between the first through hole 14 and the end where the primary step is located is 80mm, and the diameter of the first through hole 14 is 3.5mm. That is, a first through hole 14 with a diameter of 3.5mm is provided at a distance of 80mm from the starting point of the primary step, and the 80mm scale is marked at the corresponding position.

[0044] Specifically, the balance pressure wheel measuring part 2 further includes a main board 26. The main board 26 is in a linear shape, and its two ends are respectively fixedly connected to the third clearance module 23 and the fourth clearance module 24. The fourth clearance module 24 is perpendicular to the main board 26, and the first clearance module 21, the second clearance module 22, the third clearance module 23, and the main board 26 are connected in sequence along a straight line.

[0045] Specifically, referring to Figure 4 , the lower stop pin measuring part 3 further includes a connecting body 34. The connecting body 34 is horizontally arranged. The first bottom distance measuring module 32, the connecting body 34, and the second bottom distance measuring module 31 are connected in sequence to form a U-shaped opening upward. The center line of the first bottom distance measuring module 32 is parallel to the second bottom distance measuring module 31. The cross-section of the first bottom distance measuring module 32 in the vertical direction is an isosceles trapezoid, that is, the cross-section of the first bottom distance measuring module 32 in the direction parallel to the paper surface is an isosceles trapezoid. The first bottom distance measuring module 32 is a lower stop pin bottom distance 3mm measuring module, and the second bottom distance measuring module 31 is a lower stop pin bottom distance 2mm measuring module.

[0046] Specifically, referring to Figure 4The connecting body 34 on the lower gear pin measuring piece 3 is a rectangular parallelepiped with a length, width and thickness of 100mm*3mm*3mm. The two ends are vertically bent with a radius of R5mm to form a first bottom distance measuring module 32 and a second bottom distance measuring module 31 respectively. One end is bent upward to form the second bottom distance measuring module 31. The second bottom distance measuring module 31 is a rectangular parallelepiped with a length, width and thickness of 20mm*3mm*3mm, and the other end is bent upward with an arc of R5mm to form a first bottom distance measuring module 32 with a length of 15mm. The outer end surface of the first bottom distance measuring module 32 is a square of 2mm*2mm, and the connection node between the first bottom distance measuring module 32 and the bending point is a square of 3mm*3mm. The horizontal cross-section of the first bottom distance measuring module 32 increases from top to bottom, and the first bottom distance measuring module 32 can cover the measurement range of 2mm-3mm. A third through hole 33 with an inner diameter of 3.5 mm and an outer radius of 3.5 mm is made on the connector 34 at a position 28.5 mm away from the second bottom distance measurement module 31. Figure 4 The thickness of the middle connector 34 is perpendicular to the paper, the length is parallel to the horizontal direction of the paper, and the width is perpendicular to the length and parallel to the longitudinal direction of the paper. The length of the first and second bottom distance measurement modules 32 and 31 is parallel to the longitudinal or vertical direction of the paper, the width is perpendicular to the length and parallel to the horizontal direction of the paper, and the thickness is perpendicular to the paper.

[0047] The axis of the third through hole 33 is parallel to the thickness direction of the connecting body 34. Figure 4 The center is a direction perpendicular to the paper surface. When the required aperture of the second through hole 33 is larger than the width of the connector 34, the upper and lower end surfaces at the position where the third through hole 33 is required can be set to a semicircular protruding structure facing outward to increase the width here.

[0048] Specifically, the first gap module 21, the second gap module 22, the third gap module 23, and the main board 26 are connected in sequence to form an approximately straight line. The upper end surfaces of the first gap module 21, the second gap module 22, and the third gap module 23 are flush, and the spacing between the lower end surface and the upper end surface of the first gap module 21, the second gap module 22, and the third gap module 23 is 1mm, 2mm, and 3mm, respectively. That is, the width dimensions of the first gap module 21, the second gap module 22, and the third gap module 23 are 1mm, 2mm, and 3mm, respectively. The lower end surfaces of the first gap module 21, the second gap module 22, and the third gap module 23 are stepped. The fourth gap module 24 is vertically arranged and its lower end is fixedly connected to the end of the main board 26 away from the third gap module 23 to form an L-shape. The fourth gap module 24 is located above the first gap module 21, the second gap module 22, the third gap module 23, and the main board 26. The first gap module 21 is a 1mm gap module between the pressure roller and the door leaf impact block, the second gap module 22 is a 2mm gap module between the pressure roller and the door leaf impact block, the third gap module 23 is a 3mm gap module between the pressure roller and the door leaf impact block, and the fourth gap module 24 is a 3mm gap module between the door leaf and the pressure roller. This allows checking whether the gap between the door leaf and the pressure roller meets installation requirements. For example, if the required gap between the door leaf and the pressure roller is less than 2mm, and the actual measurement shows that the gap between the door leaf and the pressure roller can accommodate the width of the third gap module 23, it can be concluded that the gap between the door leaf and the pressure roller does not meet the installation requirements. This detection and troubleshooting method can be used as a reference when measuring other dimensions, greatly improving detection efficiency.

[0049] The length and thickness of the first, second, and third gap modules 21, 22, and 23 are all 10 mm and 2 mm, respectively. The thickness is perpendicular to the paper, and the length is parallel to the paper and perpendicular to the width. Each of the first, second, third, and fourth gap modules 21, 22, 23, and 24 has scale markings indicating their length, thickness, and width.

[0050] Specifically, the lower swing arm and the slide measuring piece 1 include a first measuring module 11, a second measuring module 12, a third measuring module 13, and a fourth measuring module 15, which are connected in sequence and whose upper end surfaces are flush with each other. The lower end surfaces of the first measuring module 11, the second measuring module 12, the third measuring module 13, and the fourth measuring module 15 are stepped. The width dimensions between the lower end surface and the upper end surface of the first measuring module 11, the second measuring module 12, the third measuring module 13, and the fourth measuring module 15 are 5.5 mm, 6.5 mm, 7.5 mm, and 8.5 mm, respectively. The first measuring module 11 forms the first The length*thickness of the first step on the lower arm and the slide measuring piece 1 is 10mm*2mm, that is, the width*length*thickness of the first measuring module 11 is 5.5mm*10mm*2mm, where the thickness is the thickness dimension perpendicular to the paper surface, and the length direction is the direction parallel to the paper surface and perpendicular to the width direction. The width measurement dimensions of the first measuring module 11, the second measuring module 12, the third measuring module 13, and the fourth measuring module 15 can cover the measurement range of 5.5-8.5mm, and the first through hole 14 is located on the fourth measuring module 15. Figure 2 The axis of the first through hole 14 is parallel to the thickness direction of the fourth measurement module 15. Figure 2 The center is the direction perpendicular to the paper.

[0051] Specifically, the first measuring module 11 is a 5.5mm measuring module for the door leaf lower arm, the second measuring module 12 is a 6.5mm measuring module for the door leaf lower arm, the third measuring module 13 is a 7.5mm measuring module for the door leaf lower arm, and the fourth measuring module 15 is a 8.5mm measuring module for the door leaf lower arm.

[0052] Specifically, along the sequential connection direction of the first measurement module 11, the second measurement module 12, the third measurement module 13, and the fourth measurement module 15, the length of the first measurement module 11, the second measurement module 12, and the third measurement module 13 are all 10 mm. The thickness of the first measurement module 11, the second measurement module 12, the third measurement module 13, and the fourth measurement module 15 in the horizontal direction is all 2 mm, that is, the first measurement module 11, the second measurement module 12, the third measurement module 13, and the fourth measurement module 15 are all 2 mm. Figure 2 The thickness perpendicular to the paper direction is 2mm.

[0053] Specifically, the EMU door fine-tuning size measuring device of this solution also includes a connecting member 4, and the first through hole 14 can be used for the connecting member 4 to pass through; a second through hole 25 is provided on the main board 26 for the connecting member 4 to pass through, and the axis of the second through hole 25 is parallel to the thickness direction of the main board 26. Figure 3The direction in the middle is perpendicular to the paper. When the required diameter of the second through-hole 25 is larger than the width of the main plate 26, the upper and lower end surfaces at the location where the second through-hole 25 is to be provided can be configured with outwardly semicircular projections to increase the width at that location. The connector 34 is provided with a third through-hole 33 for the connector 4 to pass through. The connector 4 is rotatably connected to the lower arm and slide measuring member 1, the balancing roller measuring member 2, and the lower gear pin measuring member 3 via the first through-hole 14, the second through-hole 25, and the third through-hole 33. During the fine-tuning dimensional measurement of the EMU door, operators can use corresponding dedicated measuring fixtures as needed, and other structures will not interfere with the measurement of the components.

[0054] When fine-tuning door dimensions, operators can quickly measure the lower arm and slide measuring piece 1, the balancing roller measuring piece 2, and the lower gear pin measuring piece 3 to verify that the installation dimensions of each door component meet requirements. The connection between each through-hole and the connector 4, along with intuitive scale markings, improves measurement efficiency and accuracy, facilitates on-site tool management, and reduces maintenance and labor costs.

[0055] The measuring part consists of three parts: the lower arm and slide measuring part 1, the balance roller measuring part 2, and the lower gear pin measuring part 3. Figure 2 This is a schematic diagram of the structure of the lower swing arm and the slide measuring piece 1. Figure 3 This is a schematic diagram of the structure of the balance wheel measuring component 2. Figure 4 It is a structural diagram of the lower gear pin measuring piece 3. Among them, the lower swing arm and slide measuring piece 1 includes a 5.5mm measuring module for the door leaf lower swing arm. After the 5.5mm measuring module for the door leaf lower swing arm, the width of the two levels increases by 1mm step by step, and there are respectively a 6.5mm measuring module for the door leaf lower swing arm, a 7.5mm measuring module for the door leaf lower swing arm, and an 8.5mm measuring module for the door leaf lower swing arm. The height of the lower swing arm 5 can be measured by each measuring module on the lower swing arm and slide measuring piece 1. A situation during measurement can be referred to Figure 5 The balancing roller measuring piece 2 includes a 1mm gap module between the roller and the door leaf impact block, a 2mm gap module between the roller and the door leaf impact block, a 3mm gap module between the roller and the door leaf impact block, and a 3mm gap module between the door leaf and the roller. The gap modules on the balancing roller measuring piece 2 can be used to measure the gap between the balancing roller 6 and the wheel groove, and between the roller and the door leaf. The measurement of the gap between the balancing roller 6 and one of the adjacent structures can be referred to. Figure 6 The lower stop pin measuring piece 3 includes a lower stop pin bottom distance 3mm measuring module and a lower stop pin bottom distance 2mm measuring module. The lower stop pin measuring piece 3 can be used to measure the lower stop pin 7 bottom distance (vertical gap). One situation during measurement can be referred to Figure 7 .

[0056] For other details of the device for fine-tuning the size of EMU doors described in the present invention, please refer to the prior art and will not be described in detail here.

[0057] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A device for measuring the fine adjustment dimensions of EMU doors, characterized by: It includes a lower control arm and a slideway measuring part, a balance roller measuring part and a lower stop pin measuring part. One end of the lower control arm and the slideway measuring part is provided with a first through hole, and the width of the other end is 5.5 mm and gradually increases by 1 mm in the direction towards the first through hole to form a three-level stepped structure; One end of the balance roller measuring part is provided with a first gap module, a second gap module and a third gap module connected in sequence along a straight line. The widths of the first gap module, the second gap module and the third gap module are 1 mm, 2 mm and 3 mm in sequence; the other end is provided with a fourth gap module, and the width of the fourth gap module is 3 mm; Both ends of the lower stop pin measuring part are convex upward with parallel first bottom distance measuring modules and second bottom distance measuring modules. The second bottom distance measuring module has a uniform width of 3 mm in the vertical direction, the width of the uppermost end of the first bottom distance measuring module is 2 mm, and gradually increases to 3 mm from top to bottom.

2. The EMU door fine-adjustment dimension measuring device according to claim 1, characterized in that: The length * thickness of the first-level step on the lower control arm and the slideway measuring part is 10 mm * 2 mm.

3. The EMU door fine-adjustment dimension measuring device according to claim 2, characterized in that: The distance between the first through hole and the end where the first-level step is located is 80 mm, and the diameter of the first through hole is 3.5 mm.

4. The EMU door fine-adjustment dimension measuring device according to claim 3, characterized in that: The balance roller measuring part further includes a main board. The main board is in a straight shape and is fixedly connected to the third gap module and the fourth gap module at both ends respectively. The fourth gap module is perpendicular to the main board, and the first gap module, the second gap module, the third gap module and the main board are connected in sequence along a straight line.

5. The EMU door fine-adjustment dimension measuring device according to claim 4, characterized in that: The lower stop pin measuring part further includes a connecting body. The first bottom distance measuring module, the connecting body and the second bottom distance measuring module are connected in sequence to form a U-shaped opening upward. The center line of the first bottom distance measuring module is parallel to the second bottom distance measuring module, and the cross-section of the first bottom distance measuring module in the vertical direction is an isosceles trapezoid.

6. The EMU door fine-adjustment dimension measuring device according to claim 4, characterized in that: The first gap module, the second gap module, the third gap module and the main board are connected in sequence to form an approximate straight shape. The upper end faces of the first gap module, the second gap module and the third gap module are flush, and the vertical widths between the lower end faces and the upper end faces are 1 mm, 2 mm and 3 mm in sequence; The fourth gap module is vertically arranged and the lower end is fixedly connected to the main board to form an L shape.

7. The EMU door fine-adjustment dimension measuring device according to claim 3, characterized in that: The lower control arm and the slideway measuring part includes a first measuring module, a second measuring module, a third measuring module and a fourth measuring module connected in sequence and with flush upper end faces. The widths between the lower end faces and the upper end faces are 5.5 mm, 6.5 mm, 7.5 mm and 8.5 mm in sequence. The first measuring module forms the first-level step, and the first through hole is located on the fourth measuring module.

8. The EMU door fine-adjustment dimension measuring device according to claim 5, characterized in that: It further includes a connecting piece. The first through hole can allow the connecting piece to pass through; the main board is provided with a second through hole for the connecting piece to pass through; the connecting body is provided with a third through hole for the connecting piece to pass through.

9. The EMU door fine-adjustment dimension measuring device according to claim 7, characterized in that: In the direction of sequential connection of the first measuring module, the second measuring module, the third measuring module and the fourth measuring module, the lengths of the first measuring module, the second measuring module and the third measuring module are all 10 mm.

10. The EMU door fine-adjustment dimension measuring device according to claim 9, characterized in that: The thickness of the first measurement module, the second measurement module, the third measurement module, and the fourth measurement module in the horizontal cross section is 2 mm.

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