Railway vehicle door balance wheel gap detection tool
By designing a testing fixture with a hinged structure, the problems of reading errors and low efficiency in the detection of the gap between the balance wheels of rail vehicle doors were solved, achieving fast and accurate testing results.
Patent Information
- Application Number
- CN202520376393.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-03-05
AI Technical Summary
In existing technologies, the detection of the gap between the balance wheels of rail vehicle doors is prone to reading errors and has low operational efficiency.
Design a testing fixture that includes a handle and a hinged arm, and uses left and right measuring plates and a middle connecting rod with a hinged structure. It performs rapid testing by inserting a pendulum into the gap of the balance wheel to determine whether the gap meets the standard.
This technology enables efficient and accurate determination of whether the gap between the door balance wheels meets the testing standards, improving testing efficiency and avoiding reading errors.
Smart Images
Figure CN223741440U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a detection tool for track traffic train overhauling, in particular to a track vehicle door balance wheel gap detection tool, belongs to the technical field of measuring tool. BACKGROUND
[0002] The existing track vehicle adopts the sliding plug type door, and the sliding plug type door is respectively provided with a balance wheel mechanism at the left upper corner of the left door leaf and the right upper corner of the right door leaf, and a balance wheel of the balance wheel mechanism provides a certain extrusion force to the closed door leaf, so that the door does not shake in the operation process, and the door sealing strip realizes better sealing performance. The balance wheel mechanism mainly comprises a balance wheel support, a balance wheel shaft, a balance wheel and corresponding fasteners, the rear end of the balance wheel shaft is fixedly installed on the balance wheel support, and the balance wheel is installed on the front end step of the balance wheel shaft. A wheel groove corresponding to the balance wheel is arranged on the door leaf, when the door leaf is closed, the balance wheel at the front end of the balance wheel shaft is obliquely arranged in the wheel groove of the door leaf, the lower edge of the balance wheel is abutted on the groove bottom of the wheel groove to extrude the door leaf, and when the door leaf is opened, the balance wheel moves out of the wheel groove. The wheel groove on the door leaf is an inner concave notch, and a protruding oblique limiting step is arranged on the outer side of the groove bottom of the wheel groove, in order that the balance wheel can smoothly enter and exit the wheel groove when the door leaf is closed and opened, a proper gap is left between the balance wheel and the wheel groove except the extrusion surface, so that scraping or clashing of the balance wheel when entering and exiting the wheel groove is prevented, the door cannot be smoothly opened and closed, and the normal operation of the vehicle is affected.
[0003] When the sliding plug type door is repeatedly opened and closed during the operation of the vehicle, the gap between the balance wheel and the wheel groove changes, so that the door balance wheel gap needs to be detected regularly, if the detected value exceeds the detection standard, the position of the balance wheel needs to be adjusted. The specific detection standard of the door balance wheel gap is that a gap of 1-3mm is left between the front end step of the balance wheel shaft and the limiting step of the wheel groove, and the minimum gap between the edge of the balance wheel and the inner wall of the wheel groove is not less than 3mm. At present, the detection work of the door balance wheel gap generally adopts a plug gauge to measure. Since the working space is small, reading errors are prone to occur when the plug gauge is used for measurement, and the measurement needs to be performed for multiple times, so that the working efficiency is low. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a track vehicle door balance wheel gap detection tool, so as to solve the problems of reading errors and low working efficiency of the existing plug gauge in the measurement of the door balance wheel gap.
[0005] The specific technical scheme adopted by the utility model is as follows:
[0006] A tooling for detecting the clearance of a rail vehicle door balance wheel includes a horizontally positioned handle. A first vertical shaft is mounted on the front end of the handle. A right measuring plate, extending forward and capable of left-right rotation, is hinged to the front end of the handle via the first vertical shaft. The vertical height of the right measuring plate is 4mm. A step is provided in the middle of the left side of the right measuring plate, dividing it into two stages of different thicknesses: the front stage has a thickness of 1mm, and the rear stage has a thickness of 3mm. A second vertical shaft is mounted on the front of the handle at a distance from the front end on the left side. A middle connecting rod, extending to the left and capable of left-right rotation, is hinged to the front of the handle via the second vertical shaft. A third vertical shaft is mounted on the left end of the middle connecting rod. A left measuring plate, extending forward and capable of left-right rotation, is hinged to the left end of the middle connecting rod via the third vertical shaft. The left measuring plate has a vertical height of 16mm and a thickness of 3mm.
[0007] When using this testing fixture to inspect the clearance of the door balance wheel, no readings are required. Simply rotate the left and right measuring plates to the corresponding angles, and insert the right measuring plate into the gap between the front step of the balance wheel axle and the limiting step of the wheel groove. If the front part of the right measuring plate can be inserted but the rear part cannot, the clearance size is considered acceptable; otherwise, it is unacceptable. Insert the left measuring plate into the minimum gap between the edge of the balance wheel and the inner wall of the wheel groove. If the left measuring plate can be inserted, the clearance size is considered acceptable; otherwise, it is unacceptable. Therefore, this testing fixture can quickly determine whether the door balance wheel clearance meets the inspection standards, resulting in high work efficiency. Furthermore, because the components of this testing fixture are connected by hinges, the left and right measuring plates and the intermediate connecting rod can automatically adjust their angles and complete the measurement operation of inserting the measuring plates into the corresponding gaps even in confined working spaces, making it convenient and flexible to use. Attached Figure Description
[0008] Figure 1 This is a three-dimensional structural diagram of the testing fixture with its right side facing outwards.
[0009] Figure 2 for Figure 1 The right side faces the view.
[0010] Figure 3 for Figure 1 Top view.
[0011] Figure 4 for Figure 1 A three-dimensional structural diagram of the testing fixture when it is flipped so that the left side faces outward.
[0012] Figure 5 This is a schematic diagram illustrating the testing standards for the gap between the door balance wheels.
[0013] Figure 6 This is a schematic diagram of using this testing fixture to test the clearance of the door balance wheel.
[0014] In the diagram: 1-handle, 1.1-anti-slip texture, 2-first vertical axis, 3-right measuring plate, 4-second vertical axis, 5-middle connecting rod, 6-third vertical axis, 7-left measuring plate. Detailed Implementation
[0015] The present invention will be further described below with reference to the embodiments and accompanying drawings. In the description of the present invention, the directional terms "upper," "lower," "front," "rear," "left," and "right" are based on the accompanying drawings. Figure 1 The orientation or positional relationship shown is defined only for the convenience of describing this utility model, and does not refer to a specific orientation that the device or component must have, and should not be regarded as a limitation of this utility model.
[0016] like Figures 1-4 As shown, this testing fixture has a horizontally positioned handle 1. The front end of the handle 1 is supported by a first vertical shaft 2. The front end of the handle 1 is hinged to a right measuring plate 3 that extends forward and can swing left and right through the first vertical shaft 2. The vertical height of the right measuring plate 3 is 4mm. A step is provided in the middle of the left side of the right measuring plate 3, dividing the right measuring plate 3 into two stages of different thicknesses: the thickness of the front stage of the right measuring plate 3 is 1mm, and the thickness of the rear stage of the right measuring plate 3 is 3mm. The front part of the handle 1 is supported by a second vertical shaft 4 at a distance from the front end on the left side. The front part of the handle 1 is hinged to a middle connecting rod 5 that extends to the left and can swing back and forth through the second vertical shaft 4. The left end of the middle connecting rod 5 is supported by a third vertical shaft 6. The left end of the middle connecting rod 5 is hinged to a left measuring plate 7 that extends forward and can swing left and right through the third vertical shaft 6. The vertical height of the left measuring plate 7 is 16mm, and its thickness is 3mm.
[0017] Furthermore, the hinges between the handle 1 and the right measuring plate 3, the handle 1 and the intermediate connecting rod 5, and the intermediate connecting rod 5 and the left measuring plate 7 are all transition fit hinges, so that the hinges have a certain rotational damping. Only when a certain force is applied will the swing angle be changed, so that the components can be roughly positioned before being inserted into the narrow space for testing.
[0018] Furthermore, the length of the front stage of the right measuring plate 3 is 15mm, the length of the rear stage is 15mm; the length of the left measuring plate 7 is 25mm; and the length of the middle connecting rod 5 is 40mm.
[0019] Furthermore, the vertical height of the handle 1 and the intermediate connecting rod 5 is the same as the vertical height of the left measuring plate 7, and the front end of the handle 1 is provided with a downward-sloping step so that the vertical height of the front end of the handle 1 is the same as the vertical height of the right measuring plate 3.
[0020] Furthermore, the left and right sides of the handle 1 are provided with anti-slip texture 1.1 to facilitate a firm grip during testing.
[0021] Further, the upper and lower corners of the front end of the left measuring plate 7 and the right measuring plate 3 are chamfered to prevent the end of the measuring plate from scratching the wheel groove of the door during measurement.
[0022] Further, the handle 1, the middle connecting rod 5, the left measuring plate 7 and the right measuring plate 3 are all made of tool steel to increase wear resistance and prevent them from being quickly worn out during use, thus causing inaccurate measurement.
[0023] As shown in FIG. 2, the specific detection standard for the balance wheel gap of the door is that a gap of 1-3 mm is left between the front end step of the balance wheel shaft and the limiting step of the wheel groove; and the minimum gap between the edge of the balance wheel and the inner wall of the wheel groove is not less than 3 mm. Figure 5 As shown in FIG. 3, when the detection tool is used to detect the balance wheel gap of the door, the lower edge of the balance wheel leans against the groove bottom of the wheel groove. When the gap between the front end step of the balance wheel shaft and the limiting step of the wheel groove is detected, the right measuring plate 3 is inserted into the gap along the groove bottom of the wheel groove, and the vertical height of the right measuring plate 3 must be less than the difference between the balance wheel radius and the balance wheel shaft radius. The balance wheel radius is 15 mm, and the balance wheel shaft radius is 8 mm, so the vertical height of the right measuring plate 3 is 4 mm. When the minimum gap between the edge of the balance wheel and the inner wall of the wheel groove is detected, the left measuring plate 7 is inserted into the gap along the groove bottom of the wheel groove, and the vertical height of the left measuring plate 7 must be greater than the balance wheel radius, so the vertical height of the left measuring plate 7 is selected as 16 mm.
[0024] Figure 6 The specific method for detecting the balance wheel gap of the door using the detection tool is as follows:
[0025] (1) Swing the left measuring plate 7 and the right measuring plate 3 to the corresponding angles, and insert the left measuring plate 7 and the right measuring plate 3 into the wheel groove by holding the handle 1.
[0026] (2) Insert the right measuring plate 3 into the gap between the front end step of the balance wheel shaft and the limiting step of the wheel groove along the groove bottom of the wheel groove, and keep the right side surface of the right measuring plate 3 in contact with the limiting step of the wheel groove and push forward during measurement. If the front stage of the right measuring plate 3 can be inserted and the rear stage cannot be inserted, it is determined that the gap size is qualified, otherwise it is unqualified. If the front stage of the right measuring plate 3 cannot be inserted, it indicates that the gap size is too small, and if the rear stage of the right measuring plate 3 can also be inserted, it indicates that the gap size is too large, so the position of the balance wheel needs to be adjusted accordingly.
[0027] (2) Insert the right measuring plate 3 into the gap between the front end step of the balance wheel shaft and the limiting step of the wheel groove along the groove bottom of the wheel groove, and keep the right side surface of the right measuring plate 3 in contact with the limiting step of the wheel groove and push forward during measurement. If the front stage of the right measuring plate 3 can be inserted and the rear stage cannot be inserted, it is determined that the gap size is qualified, otherwise it is unqualified. If the front stage of the right measuring plate 3 cannot be inserted, it indicates that the gap size is too small, and if the rear stage of the right measuring plate 3 can also be inserted, it indicates that the gap size is too large, so the position of the balance wheel needs to be adjusted accordingly.
[0028] (3) insert the left measuring plate 7 into the smallest gap between the edge of the balancing wheel and the inner wall of the wheel groove along the groove bottom, keep the left side of the left measuring plate 7 in contact with the inner wall of the wheel groove and push forward during measurement, if the left measuring plate 7 can be inserted, it is determined that the gap size is qualified, otherwise it is unqualified. Unqualified means that the gap is too small, and the position of the balancing wheel needs to be adjusted accordingly.
[0029] The above description is only a typical embodiment of the present application, and is not used to limit the present application. Any modification or equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A rail vehicle door wheel gap detection tool, characterized by: The detection tool is provided with a transversely arranged handle (1), a first vertical shaft (2) is arranged at the front end of the handle (1), a right measuring plate (3) which extends forward and can swing left and right is hinged to the front end of the handle (1) through the first vertical shaft (2), the vertical height of the right measuring plate (3) is 4mm, a step is arranged in the middle of the left side surface of the right measuring plate (3), so that the right measuring plate (3) is divided into two stages with different thicknesses, the thickness of the front stage of the right measuring plate (3) is 1mm, and the thickness of the rear stage of the right measuring plate (3) is 3mm; a second vertical shaft (4) is arranged at the front part of the handle (1) at a position which is separated from the front end by a distance on the left side surface, a middle connecting rod (5) which extends leftward and can swing forward and backward is hinged to the front part of the handle (1) through the second vertical shaft (4), a third vertical shaft (6) is arranged at the left end of the middle connecting rod (5), a left measuring plate (7) which extends forward and can swing left and right is hinged to the left end of the middle connecting rod (5) through the third vertical shaft (6), the vertical height of the left measuring plate (7) is 16mm, and the thickness of the left measuring plate (7) is 3mm.
2. The rail vehicle door equalizer wheel gap detection tool of claim 1, wherein: The handle (1) and the right measuring plate (3) are hinged, the handle (1) and the middle connecting rod (5) are hinged, and the middle connecting rod (5) and the left measuring plate (7) are hinged by transition fit.
3. The rail vehicle door equalizer wheel gap inspection tool of claim 1, wherein: The length of the front stage of the right measuring plate (3) is 15mm, the length of the rear stage of the right measuring plate (3) is 15mm, the length of the left measuring plate (7) is 25mm, and the length of the middle connecting rod (5) is 40mm.
4. The railcar door equalizer wheel gap inspection tool of claim 1, wherein: The vertical height of the handle (1) and the middle connecting rod (5) is the same as the vertical height of the left measuring plate (7), and a downward step is arranged at the front end of the handle (1), so that the vertical height of the front end of the handle (1) is the same as the vertical height of the right measuring plate (3).
5. The railcar door equalizer wheel gap inspection tool of claim 1, wherein: Anti-skid lines (1.1) are arranged on the left and right side surfaces of the handle (1).
6. The railcar door equalizer wheel gap inspection tool of claim 1, wherein: Rounded corners are arranged at the upper and lower edges of the front ends of the left measuring plate (7) and the right measuring plate (3).
7. The railcar door equalizer wheel gap inspection tool of claim 1, wherein: The handle (1), the middle connecting rod (5), the left measuring plate (7) and the right measuring plate (3) are all made of tool steel.