Detection tool for high-speed railway fastener elastic strip

Abstract

The utility model discloses a testing fixture for a high-speed railway fastener elastic strip. The main design principle of the detection tool is that the conical positioning pin is matched with the spring to carry out centering positioning on the elastic strip, and the detected sizes of the positioned elastic strip respectively correspond to nick marks on the detection platform. And meanwhile, detection of sizes such as the tail spacing of the elastic strip, the width of a nail placing position, the spacing of buckling and pressing limbs, the center distance of the buckling and pressing limbs, the section diameter and the like can be met by matching with single-piece special-purpose detection tools of other sizes. The comprehensive testing fixture is simple in use method, stable and consistent in measurement data, free of human interference factors, and capable of improving product quality and working efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail transit, and particularly relates to a gauge for a high-speed railway fastener clip spring. Background Art

[0002] High-speed railway fasteners are components connecting rails and sleepers, and play an important role in ensuring the reliability, stability and comfort of the track. With the rapid development of high-speed railways in China, the requirements for the service performance of fasteners are further improved. The clip spring is an important part of the fastener. It mainly uses the energy stored during elastic deformation to relieve mechanical shock and vibration, and bears cyclic and long-term alternating stresses such as torsion and bending under dynamic loads. The fracture of the clip spring will pose a great safety hazard to railway transportation. The clip spring is a special-shaped spring. When it is detected by gauges such as calipers during production measurement, the measurement method is complex, the measurement efficiency is slow, and the measurement results are prone to deviation. Content of the Utility Model

[0003] The purpose of the utility model is to provide a gauge for a high-speed railway fastener clip spring, which is used for the rapid detection of W-shaped clip springs.

[0004] Based on the above purpose, the utility model adopts the following technical solutions:

[0005] A gauge for a high-speed railway fastener clip spring includes a detection platform, a tail spacing go-no-go gauge for measuring the tail spacing of the clip spring's middle limb, a nail placement width go-no-go gauge for measuring the width of the nail placement at the middle limb of the clip spring, a buckle limb spacing go-no-go gauge for measuring the spacing between buckle limbs, and a diameter caliper for measuring the cross-sectional diameter of the clip spring. There are positioning columns and a retaining bar on the detection platform. There is a notch in the middle of the retaining bar. The positioning column is arranged on the front side of the notch. A spring and a positioning pin are sleeved on the positioning column. The positioning pin is located above the spring. There are two scale grooves on the upper surface of the detection platform. The two scale grooves are perpendicular to the retaining bar and are symmetrically arranged relative to the central axis of the detection platform.

[0006] Further, a marking line of the central axis is provided on the upper surface of the detection platform. The detection platform is provided with a long groove adapted to the retaining bar and a circular groove adapted to the positioning column. There is a counterbore at the bottom of the circular groove. The bottom surface of the notch of the retaining bar is flush with the upper surface of the detection platform. The length of the notch along the length direction of the retaining bar is not less than the outer diameter of the bottom of the positioning pin. There are several counterbores at the bottom of the long groove. The bottom surface of the retaining bar is provided with blind holes corresponding to the counterbores of the long groove. The retaining bar is fixed to the detection platform by screws.

[0007] Further, the nail placement width go-no-go gauge is in the shape of a cylindrical step, and is composed of two coaxial cylinders with different diameters. A through hole for the positioning column to pass through is provided inside the nail placement width go-no-go gauge along the axial direction, and the central axis of the through hole and the central axis of the nail placement width go-no-go gauge are the same straight line.

[0008] Further, the tail spacing go-no-go gauge is in the shape of a cylindrical step, consisting of three coaxial cylinders with different diameters. The thinnest section is the go gauge section, the middle section is the no-go gauge section, and the thickest section is the hand-held section.

[0009] Further, the upper part of the positioning pin is cylindrical, the lower part is frustum-shaped, and the outer diameter at the top of the frustum is the same as the outer diameter of the cylinder. A through hole for the positioning post to pass through is provided axially inside the positioning pin, and the central axis of the through hole and the central axis of the positioning pin are the same straight line.

[0010] Further, the cross-section of the crimping limb spacing go-no-go gauge is convex-shaped, and the thickness of the crimping limb spacing go-no-go gauge is lower than the arch height of the head of the middle limb.

[0011] Further, clamping grooves extending axially along the diameter clamping plate are provided at both ends of the diameter clamping plate, and the clamping grooves are used to measure the cross-sectional diameter of the elastic strip.

[0012] Further, the materials of the detection platform, the tail spacing go-no-go gauge, the nail placement width go-no-go gauge, the crimping limb spacing go-no-go gauge, the diameter clamping plate, the positioning pin, the positioning post and the retaining bar are all Cr12MoV.

[0013] The method for detecting using the above-mentioned inspection tool for the elastic strip of the high-speed railway fastener is as follows:

[0014] Place the W-shaped elastic strip on the detection platform. The positioning pin passes through the center position of the nail placement part of the middle limb of the elastic strip to center and position the elastic strip, and the inner side of the tail of the side limb of the elastic strip abuts against the retaining bar;

[0015] Detect the following various dimensions through each go-no-go gauge, diameter clamping plate and detection platform and in cooperation with general measuring tools:

[0016] E is the tail spacing of the middle limb of the elastic strip, which is measured by the tail spacing go-no-go gauge;

[0017] F is the width of the nail placement part of the middle limb of the elastic strip. Remove the positioning pin and measure it by sleeving the nail placement width go-no-go gauge on the positioning post;

[0018] I is the spacing between the two crimping limbs of the elastic strip, which is measured by the crimping limb spacing go-no-go gauge;

[0019] J is the distance between the two crimping limbs of the elastic strip from the central axis, which is measured by observing whether the vertical projection of the end faces of the two crimping limbs of the elastic strip falls within the scale groove on the detection platform;

[0020] G is the width of the arc at the front end of the middle limb, which is measured by a vernier caliper;

[0021] D is the cross-sectional diameter of the elastic strip, which is measured by the diameter clamping plate.

[0022] The main design principle of the inspection tool for this utility model is that the conical positioning pin cooperates with the spring to center the elastic strip. After positioning, the dimensions inspected by the elastic strip respectively correspond to the notch marks on the comprehensive inspection tool platform. At the same time, the single-piece special inspection tools for other dimensions can be used to meet the detection of dimensions such as the tail spacing of the elastic strip, the width at the nail placement position, the spacing between the crimping limbs, the center distance between the crimping limbs, and the minimum material diameter at the bending position. The comprehensive inspection tool has a simple usage method, stable and consistent measurement data, no human interference factors, and improves product quality and work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the structural schematic diagram of the elastic strip;

[0024] Figure 2 is Figure 1 the rear view of

[0025] Figure 3 is the top view of the diameter caliper;

[0026] Figure 4 is Figure 3 the side view of

[0027] Figure 5 is the top view of the through-and-non-through gauge for the spacing between the crimping limbs;

[0028] Figure 6 is the rear view of the through-and-non-through gauge for the spacing between the crimping limbs;

[0029] Figure 7 is the structural schematic diagram of the through-and-non-through gauge for the tail spacing;

[0030] Figure 8 is Figure 7 the top view of

[0031] Figure 9 is the structural schematic diagram of the through-and-non-through gauge for the width at the nail placement position;

[0032] Figure 10 is Figure 9 the top view of

[0033] Figure 11 is the structural schematic diagram of the positioning pin;

[0034] Figure 12 is Figure 11 the top view of

[0035] Figure 13 is the structural schematic diagram of the inspection platform;

[0036] Figure 14 is Figure 13 the A-A sectional view of

[0037] Figure 15 is Figure 13The sectional view taken along line B-B;

[0038] Figure 16 It is a schematic diagram of the result of the stop bar;

[0039] Figure 17 It is Figure 16 the bottom view;

[0040] Figure 18 It is a schematic structural diagram of the positioning post;

[0041] 1. Diameter caliper, 2. Snap-in limb spacing go-no-go gauge, 3. Tail spacing go-no-go gauge, 4. Nail placement width go-no-go gauge, 5. Positioning pin, 6. Detection platform, 61. Scale groove, 62. Central axis, 7. Stop bar, 8. Positioning post. Specific implementation mode

[0042] The technical solution of the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0043] Embodiment 1:

[0044] A fixture for high-speed railway fastener elastic bars, as Figures 1 to 18 shown, includes a detection platform 6, a tail spacing go-no-go gauge 3 for measuring the tail spacing of the middle limb of the elastic bar, a nail placement width go-no-go gauge 4 for measuring the width of the nail placement position of the middle limb of the elastic bar, a snap-in limb spacing go-no-go gauge 2 for measuring the snap-in limb spacing, a diameter caliper 1 for measuring the cross-sectional diameter of the elastic bar. There are a positioning post 8 and a stop bar 7 on the detection platform 6. There is a notch in the middle of the stop bar 7. The positioning post 8 is arranged on the front side of the notch. A spring and a positioning pin 5 are sleeved on the positioning post 8. The positioning pin 5 is located above the spring. There are two scale grooves 61 on the upper surface of the detection platform 6. The two scale grooves 61 are perpendicular to the stop bar 7 and are symmetrically arranged relative to the central axis 62 of the detection platform 6.

[0045] The upper surface of the detection platform 6 is provided with a marking line of the central axis 62. The detection platform 6 is provided with a long groove adapted to the stop bar 7 and a circular groove adapted to the positioning post 8. There is a counterbore at the bottom of the circular groove. The bottom surface of the notch of the stop bar 7 is flush with the upper surface of the detection platform 6. The length of the notch along the length direction of the stop bar 7 is not less than the outer diameter of the bottom of the positioning pin 5. There are several counterbores at the bottom of the long groove. The bottom surface of the stop bar 7 is provided with blind holes corresponding to the counterbores of the long groove. The stop bar 7 is fixed on the detection platform 6 by screws.

[0046] The nail placement width go-no-go gauge 4 is in a cylindrical step shape and is composed of two coaxial cylinders with different diameters. And there is a through hole for the positioning post 8 to pass through along the axial direction inside the nail placement width go-no-go gauge 4. The central axis of the through hole and the central axis of the nail placement width go-no-go gauge 4 are the same straight line.

[0047] The tail spacing go-no-go gauge 3 is in the shape of a cylindrical step, consisting of three coaxial cylinders with different diameters. The thinnest section is the go gauge section, the middle section is the no-go gauge section, and the thickest section is the hand-held section.

[0048] The upper part of the positioning pin 5 is cylindrical and the lower part is frustum-conical, and the outer diameter at the top of the frustum is the same as the outer diameter of the cylinder. A through hole for the positioning post 8 to pass through is provided axially inside the positioning pin 5, and the central axis of the through hole and the central axis of the positioning pin 5 are the same straight line.

[0049] The cross-section of the crimping limb spacing go-no-go gauge 2 is convex-shaped, and the thickness of the crimping limb spacing go-no-go gauge 2 is lower than the head arch height H of the middle limb.

[0050] The materials of the detection platform 6, the tail spacing go-no-go gauge 3, the nail placement width go-no-go gauge 4, the crimping limb spacing go-no-go gauge 2, the diameter card 1, the positioning pin 5, the positioning post 8, and the stop bar 7 are all Cr12MoV.

[0051] As Figure 3 and Figure 4 shown, both ends of the diameter card 1 are provided with card slots extending along the axis of the diameter card. The card slots are used to measure the cross-sectional diameter of the elastic strip. The width W1 of the card slot is 12.3 mm to 12.32 mm, and the thickness T1 of the diameter card 1 is 3 mm.

[0052] As Figure 5 and Figure 6 shown, the width W2 of the go gauge end of the crimping limb spacing go-no-go gauge 2 is 52 to 52.05 mm, the width W3 of the no-go gauge end of the crimping limb spacing go-no-go gauge 2 is 55.95 to 56 mm, the total length L1 of the crimping limb spacing go-no-go gauge 2 is 80 ± 0.5 mm, the length L2 of the no-go gauge end of the crimping limb spacing go-no-go gauge 2 is 40 mm, and the thickness T2 of the crimping limb spacing go-no-go gauge 2 is 15 ± 0.2 mm.

[0053] As Figure 7 and Figure 8 shown, the tail spacing go-no-go gauge 3 is of a cylindrical step type. The thinnest end is the go gauge section, the middle section is the no-go gauge section, and the thickest section is the hand-held end. The total length L3 is 100 mm, the diameter D1 of the go gauge section is 8.5 to 8.55 mm, the length L4 of the go gauge section is 20 mm, the diameter D2 of the no-go gauge section is 12.95 to 13 mm, and the length L5 of the no-go gauge section is 20 mm.

[0054] As Figure 9 and Figure 10 shown, the nail placement width go-no-go gauge 4 is of a cylindrical step type. The thin end is the go gauge section, the thick end is the no-go gauge section. The total length L6 is 45 ± 0.2 mm, the diameter D3 of the go gauge section is 21.5 to 21.53 mm, the length L7 of the go gauge section is 20 ± 0.1 mm, the diameter D4 of the no-go gauge section is 22.97 to 23 mm, and the through hole diameter D5 is 13 to 13.03 mm.

[0055] As Figure 11 and Figure 12 described, the total length L8 of the positioning pin 5 is 45 ± 0.2 mm, the diameter D6 of the upper cylindrical section is 21.5 - 21.53 mm, the length L9 of the cylindrical section is 20 ± 0.1 mm, the bottom diameter D7 of the frustum of a cone is 27.5 ± 0.3 mm, and the diameter D8 of the through hole is 13 - 13.03 mm.

[0056] As Figures 13 to 15 shown, the length L10 of the inspection platform 6 is 200 ± 0.5 mm, and the width W4 is 200 ± 0.2 mm.

[0057] The distance L11 from the center of the circular groove to the left side of the inspection platform 6 is 38.5 ± 0.5 mm, the width W5 from the center of the circular groove to the lower side of the inspection platform 6 is 100 ± 0.1 mm, the groove depth H1 of the long groove and the circular groove is 10 ± 0.1 mm, the diameter of the circular groove is 12.9 - 13 mm, the thickness T3 of the inspection platform 6 is 25 ± 0.2 mm, the distance L12 from the outer sidewall of the scale groove 61 to the central axis is 28.4 ± 0.03 mm, the distance L13 from the inner sidewall of the scale groove 61 to the central axis is 25.6 ± 0.03 mm, and the groove depth H2 of the scale groove is 0.5 mm.

[0058] As Figure 16 and Figure 17 shown, the length L14 of the retaining bar 7 is 200 ± 0.1 mm, the height H3 of the retaining bar 7 is 23 ± 0.1 mm, the width W6 of the retaining bar 7 is 9.95 - 10 mm, the length L15 of the notch is 25 ± 0.2 mm, and the depth H4 of the notch is 14 mm.

[0059] As Figure 18 shown, the length L16 of the positioning post 8 is 85 ± 0.2 mm, and the diameter D9 is 12.97 - 13 mm.

[0060] The inner diameter of the spring used in the inspection of this application is 15.65 mm, the outer diameter is 17.64 mm, and the length is 35.6 mm.

[0061] The method for inspection using the above - mentioned inspection tool for the elastic clip of high - speed railway fasteners, as Figure 1 and Figure 2 shown, the process is as follows:

[0062] Place the W - shaped elastic clip on the inspection platform 6. The positioning pin 5 passes through the center position of the nail - placing part of the middle limb of the elastic clip to center - position the elastic clip, and the inner side of the tail of the side limb of the elastic clip abuts against the retaining bar.

[0063] Detect the following various dimensions through each go - no - go gauge, diameter caliper, inspection platform and in cooperation with a vernier caliper:

[0064] E is the distance between the tails of the middle limb of the elastic strip, which is measured by the through and non-through gauge 3 for the tail distance; the technical requirement for the distance between the tails of the middle limb of the elastic strip is 8.5 - 13 mm. Therefore, when measuring the distance between the tails of the middle limb of the elastic strip with the through and non-through gauge 3 for the tail distance, the 8.5-mm-wide through-section should be able to pass through, and the 13-mm non-through-section should be able to stop it.

[0065] F is the width of the nail-placement position of the middle limb of the elastic strip. Remove the positioning pin and put the through and non-through gauge 4 for the nail-placement width on the positioning post for measurement; the technical requirement for the width of the nail-placement position of the middle limb of the elastic strip is 21.3 - 23 mm. Therefore, when measuring the width of the nail-placement position of the middle limb of the elastic strip with the through and non-through gauge 4 for the nail-placement width, the 21.5-mm-wide through-section should be able to pass through, and the 23-mm non-through-section should be able to stop it.

[0066] I is the distance between the two clamping limbs of the elastic strip, which is measured by the through and non-through gauge 2 for the clamping-limb distance; the technical requirement for the distance between the two clamping limbs of the elastic strip is 54 ± 2 mm. Therefore, when measuring the distance between the two clamping limbs of the elastic strip with the through and non-through gauge 2 for the clamping-limb distance, the 52-mm through-end should be able to pass through, and the 56-mm non-through gauge should be able to stop it.

[0067] J is the distance from the two clamping limbs of the elastic strip to the central axis, which is measured by observing whether the perpendicular projection of the end faces of the two clamping limbs of the elastic strip falls within the scale groove 61 on the detection platform; the technical requirement for the distance from the two clamping limbs of the elastic strip to the central axis is 27 ± 1 mm. Therefore, during detection, observe that the perpendicular projection of the end faces of the two clamping limbs of the elastic strip should fall within the scale groove on the detection platform.

[0068] G is the width of the arc at the front end of the middle limb, which is measured by a vernier caliper;

[0069] D is the diameter of the cross-section of the elastic strip, which is measured by the diameter gauge 1; the technical requirement for the diameter of the cross-section of the elastic strip is ≥ 12.3 mm. Therefore, when measuring the diameter of the cross-section of the elastic strip, the gauge slot of the diameter gauge 1 cannot pass through (except for the product marking at the front-end arc of the middle limb and the flattened part of the middle limb, that is, Figure 1 at S1, S2, and S3 in

[0070] Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Anyone familiar with this technology can make various modifications and decorations without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model should be defined by the claims.

Claims

1. A fixture for a spring clip of a high-speed railway fastener, characterized in that, It includes a detection platform, a tail spacing go-no-go gauge for measuring the distance between the tails of the elastic strip's middle limb, a nail placement width go-no-go gauge for measuring the width of the nail placement position on the middle limb of the elastic strip, a buckle limb spacing go-no-go gauge for measuring the distance between the buckle limbs, a diameter caliper for measuring the cross-sectional diameter of the elastic strip. There are positioning posts and a retaining bar on the detection platform. There is a notch in the middle of the retaining bar, and the positioning posts are arranged on the front side of the notch. A spring and a positioning pin are sleeved on the positioning posts, and the positioning pin is located above the spring. There are two scale grooves on the upper surface of the detection platform. The two scale grooves are perpendicular to the retaining bar and are symmetrically arranged with respect to the central axis of the detection platform.

2. The inspection tool for the elastic clip of the high-speed railway fastener according to claim 1, characterized in that, There is a marking line of the central axis on the upper surface of the detection platform. The detection platform is provided with a long groove adapted to the retaining bar and a circular groove adapted to the positioning post. There is a counterbore at the bottom of the circular groove. The bottom surface of the notch of the retaining bar is flush with the upper surface of the detection platform. The length of the notch along the length direction of the retaining bar is not less than the outer diameter of the bottom of the positioning pin. There are several counterbores at the bottom of the long groove, and blind holes corresponding to the counterbores of the long groove are provided on the bottom surface of the retaining bar. The retaining bar is fixed on the detection platform by screws.

3. The inspection tool for the elastic clip of the high-speed railway fastener according to claim 1, characterized in that, The nail placement width go-no-go gauge is in the shape of a cylindrical step, composed of two coaxial cylinders with different diameters. And there is a through hole for the positioning post to pass through along the axial direction inside the nail placement width go-no-go gauge, and the central axis of the through hole and the central axis of the nail placement width go-no-go gauge are the same straight line.

4. The inspection tool for the elastic clip of the high-speed railway fastener according to claim 1, characterized in that, The tail spacing go-no-go gauge is in the shape of a cylindrical step, composed of three coaxial cylinders with different diameters. The thinnest section is the go gauge section, the middle section is the no-go gauge section, and the thickest section is the holding section.

5. The inspection tool for the elastic clip of the high-speed railway fastener according to claim 1, characterized in that, The upper part of the positioning pin is cylindrical and the lower part is frustum-shaped, and the outer diameter of the top of the frustum is the same as the outer diameter of the cylinder. There is a through hole for the positioning post to pass through along the axial direction inside the positioning pin, and the central axis of the through hole and the central axis of the positioning pin are the same straight line.

6. The inspection tool for the elastic clip of the high-speed railway fastener according to claim 1, characterized in that, The cross-section of the buckle limb spacing go-no-go gauge is convex-shaped, and the thickness of the buckle limb spacing go-no-go gauge is lower than the arch height of the head of the middle limb.

7. The inspection tool for the elastic clip of the high-speed railway fastener according to claim 1, characterized in that, Both ends of the diameter caliper are provided with caliper grooves extending along the axial direction of the diameter caliper, and the caliper grooves are used to measure the cross-sectional diameter of the elastic strip.

8. The inspection tool for the elastic clip of the high-speed railway fastener according to any one of claims 1 to 7, characterized in that, The materials of the detection platform, the tail spacing go-no-go gauge, the nail placement width go-no-go gauge, the buckle limb spacing go-no-go gauge, the diameter caliper, the positioning pin, the positioning post and the retaining bar are all Cr12MoV.

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