A heavy load spring strip comprehensive size detection platform and detection method

Abstract

The application discloses a heavy load elastic strip comprehensive size detection platform and a detection method. The detection platform comprises a reference base plate and a back plate fixed on the reference base plate, and a middle limb tail end arc segment spacing block is arranged on the back plate through a rear positioning shaft. A left positioning block, a right positioning block, a middle limb lower end height block and an elastic range block are arranged on the reference base plate, a left limb arch height block is arranged on the left positioning block through a left positioning shaft, a right limb arch height block and a total length block are arranged on the right positioning block through a right positioning shaft, a middle limb width block is arranged on the elastic range block through a center positioning shaft, and two limb width blocks are arranged on the reference base plate through front positioning shafts. Compared with the prior art, the eight sizes of the heavy load elastic strip, including the middle limb width A, the two limb widths B, the two limb arch heights C, the middle limb lower end height D, the elastic range E, the middle limb tail end arc segment spacing F, the two limb spacings G and the total length H, can be quickly and accurately detected.

Description

TECHNICAL FIELD

[0001] The application relates to a heavy load spring strip comprehensive size detection platform and a detection method. BACKGROUND

[0002] The spring strip is an important component of a railway fastening system, provides necessary clamping pressure for a steel rail, and can prevent the steel rail from overturning and climbing. The spatial shape of the spring strip is complex, the size precision is high, the number of detection items is large, and the detection efficiency of general gauges (such as a caliper, a plug gauge, etc.) is extremely low. In terms of the spring strip comprehensive detection platform, the patent CN202111005645.0 proposes a comprehensive detection platform for omega-shaped spring strips, which can quickly detect seven detection items, including the middle width, the two limb widths, the middle arch height, the two limb arch heights, etc. Compared with CN201830088339 which can only detect two sizes, the middle arch height and the two limb arch heights, the detection efficiency of the comprehensive detection platform is greatly improved. The heavy load spring strip to be detected by the application belongs to an omega-shaped spring strip, but the structure of the spring strip is obviously different from that of a general omega-shaped spring strip, the detection items and the number thereof are different, and the spring strip cannot be detected by using the spring strip comprehensive detection platform described in the above patent. SUMMARY

[0003] In order to overcome the above-mentioned defects of the prior art, the application provides a heavy load spring strip comprehensive size detection platform and a detection method.

[0004] The technical scheme adopted by the application to solve the technical problems is as follows: a heavy load spring strip comprehensive size detection platform, comprising a reference base plate and a back plate fixed on the reference base plate, a middle limb tail end arc segment spacing block is arranged on the back plate through a rear positioning shaft; a left positioning block, a right positioning block, a middle limb lower end height block and a spring travel block are arranged on the reference base plate, a left limb arch height block is arranged on the left positioning block through a left positioning shaft, a right limb arch height block and a total length block are arranged on the right positioning block through a right positioning shaft, a middle limb width block is arranged on the spring travel block through a center positioning shaft, and two limb width blocks are arranged on the reference base plate through front positioning shafts.

[0005] The application further provides a heavy load spring strip comprehensive size detection method, which comprises the following contents.

[0006] I. Detection of the height D of the middle limb lower end: adjust the middle limb lower end height block left and right so that the center mark of the middle limb lower end height block is 5-10 cm to the right of the center mark of the reference base plate; place the heavy load spring on the upper surface of the reference base plate, with the two ends of the spring close to the reference plane of the back plate and the reference base plate, and the middle limb of the spring placed within the width of the through end face of the middle limb lower end height block; observe whether the lower end of the middle limb of the spring contacts the through end face of the middle limb lower end height block; if not, the minimum size of the middle limb lower end height D is qualified; if so, the size of the middle limb lower end height D is too small and unqualified; keep the spring stationary and move the middle limb lower end height block left and right, and observe whether the stop end face of the middle limb lower end height block interferes with the lower end of the middle limb of the spring; if so, the maximum size of the middle limb lower end height D is qualified; if not, the size of the middle limb lower end height D is too large and unqualified;

[0007] II. Detection of the arch height C of the two limbs: adjust the middle limb lower end height block left and right so that the center mark of the middle limb lower end height block is aligned with the center mark of the reference base plate, and ensure that the middle limb lower end height block is placed in the center, and move the spring to the left so that the left limb of the spring contacts the side surface of the left positioning block, while ensuring that the two ends are close to the reference plane of the back plate and the reference base plate; rotate the left limb arch height block and the right limb arch height block; if the through end face of the left limb arch height block and the right limb arch height block passes, the maximum size of the arch height C of the two limbs is qualified; if not, the size of the arch height C of the two limbs is too large and unqualified; if the stop end face of the left limb arch height block and the right limb arch height block does not pass, the minimum size of the arch height C of the two limbs is qualified; if so, the size of the arch height C of the two limbs is too small and unqualified;

[0008] III. Detection of the total length H: the detection method is the same as that of the arch height C of the two limbs, by rotating the total length block, whether the through end face and the stop end face of the total length block pass to determine whether the maximum size and the minimum size of the total length H are qualified;

[0009] IV. Detection of the distance F between the middle limb tail end arc segments: rotate the middle limb tail end arc segment distance block; if the through end cylindrical surface of the middle limb tail end arc segment distance block passes through the gap between the middle limb tail end arc segments of the spring, the minimum size of the distance F between the middle limb tail end arc segments is qualified; if not, the size of the distance F between the middle limb tail end arc segments is too small and unqualified; if the stop end cylindrical surface of the middle limb tail end arc segment distance block does not pass, the maximum size of the distance F between the middle limb tail end arc segments is qualified; if so, the size of the distance F between the middle limb tail end arc segments is too large and unqualified;

[0010] V. Detection of the middle limb width A and the two limb width B: the detection method is the same as that of the arch height C of the two limbs, by rotating the middle limb width block and the two limb width block respectively, whether the through end face and the stop end face of the two blocks pass to determine whether the maximum size and the minimum size of the middle limb width A and the two limb width B are qualified;

[0011] Six, the detection of the elastic range E: move the elastic range block forward, if the through end surface of the elastic range block passes the lower end of the middle limb of the elastic strip, it is determined that the minimum size of the elastic range E is qualified, if not, it is determined that the size of the elastic range E is too small and unqualified; after the through end surface of the elastic range block passes, continue to move the elastic range block forward, if the stop end surface of the elastic range block does not pass, it is determined that the maximum size of the elastic range E is qualified, if it passes, it is determined that the size of the elastic range E is too large and unqualified;

[0012] Seven, the detection of the distance G between the two limbs: after the detection of the elastic range E is completed, keep the elastic range block still, move the elastic strip right until the right toe end surface of the elastic strip contacts with the left side surface of the elastic range block, and the two ends of the elastic strip keep close to the reference plane of the back plate and the reference base plate; observe the position of the right toe end surface of the elastic strip, if the right toe end surface of the elastic strip is located between the first scale line and the second scale line, it is determined that the size of the distance G between the two limbs is qualified; if the right toe end surface of the elastic strip is located to the left of the first scale line, it is determined that the size of the distance G between the two limbs is too small and unqualified; if the right toe end surface of the elastic strip is located to the right of the second scale line, it is determined that the size of the distance G between the two limbs is too large and unqualified.

[0013] Compared with the prior art, the positive effects of the present application are:

[0014] The detection platform of the present application can quickly and accurately detect eight sizes of the heavy load elastic strip, including the middle limb width A, the two-limb width B, the two-limb arch height C, the middle limb lower end height D, the elastic range E, the distance F between the middle limb tail end arc segments, the distance G between the two limbs and the total length H. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be described by examples and with reference to the accompanying drawings, in which:

[0016] Figure 1 It is a structural schematic view of the heavy load elastic strip comprehensive detection platform;

[0017] Figure 2 It is a structural schematic view of the bottom of the heavy load elastic strip comprehensive detection platform;

[0018] Figure 3 It is a structural schematic view of the reference base plate;

[0019] Figure 4 It is a structural schematic view of the bottom of the reference base plate;

[0020] Figure 5 It is a structural schematic view of the left positioning shaft;

[0021] Figure 6 It is a structural schematic view of the left limb arch height block;

[0022] Figure 7 It is a structural schematic view of the left positioning block;

[0023] Figure 8 It is a structural schematic view of the right positioning shaft;

[0024] Figure 9 Structure diagram of right limb height block;

[0025] Figure 10 Structure diagram of total length block;

[0026] Figure 11 Structure diagram of right positioning block;

[0027] Figure 12 Structure diagram of center positioning shaft;

[0028] Figure 13 Structure diagram of middle limb width block;

[0029] Figure 14 Structure diagram of elastic range block;

[0030] Figure 15 Structure diagram of back plate;

[0031] Figure 16 Structure diagram of middle limb tail end arc segment spacing block;

[0032] Figure 17 Structure diagram of front positioning shaft;

[0033] Figure 18 Structure diagram of two limb width block;

[0034] Figure 19 Structure diagram of rear positioning shaft;

[0035] Figure 20 Structure diagram of middle limb lower end height block;

[0036] Figure 21 Detection schematic diagram of two limb spacing;

[0037] Figure 22 Structure schematic diagram and detection item of the heavy load elastic strip. DETAILED DESCRIPTION

[0038] The heavy load elastic strip comprehensive size detection platform provided by the present application is as shown in Figure 1 and Figure 2As shown, including: reference base plate 1, left positioning block 2, left limb arch height block 3, left positioning shaft 4, back plate 5, heavy load elastic strip 6, middle limb lower end height block 7, hexagonal nut 8, middle limb tail end arc segment spacing block 9, rear positioning shaft 10, right positioning shaft 11, right limb arch height block 12, total length block 13, right positioning block 14, front positioning shaft 15, two limb width block 16, elastic range block 17, elastic range block handle 18, middle limb width block 19, hexagonal nut 20, center positioning shaft 21, support bolt 22, hexagonal nut 23, cover plate 24, internal hexagonal bolt 25, etc.

[0039] The structure diagram of reference base plate 1 is shown in Figure 3 and Figure 4 . The upper surface of reference base plate 1 is a reference plane with fine grinding processing; a long groove 101 is opened on the upper surface for installing left positioning block 2; threaded holes 102, 107, 108 and through holes 109 are opened on the upper surface for installing left positioning shaft 4, right positioning shaft 11, front positioning shaft 15 and center positioning shaft 21 respectively; a long hole stepped groove 103 is opened on the upper surface for installing middle limb lower end height block 7; a U-shaped groove 104 is opened to avoid interference with middle limb tail end arc segment spacing block 9; a centering notch 111 is opened on the upper surface to facilitate adjusting the position of middle limb lower end height block 7; a square groove 110 is opened on the upper surface for installing elastic range block 17; a first scale line 105 and a second scale line 106 are opened on the upper surface, wherein the second scale line 106 and the first scale line 105 are respectively the upper and lower limit scale marks of the two limb spacing I; a threaded hole 113 is opened on the rear surface for fixing back plate 5; a threaded hole 112 is opened on the lower surface for installing support bolt 22; a threaded hole 114 is opened on the lower surface for installing cover plate 24.

[0040] The structure of left positioning shaft 4 is shown in Figure 5 , including: square face 401, cylindrical surface 402, external thread 403.

[0041] The structure of left limb arch height block 3 is shown in Figure 6 , including: through hole 301, through end face 302, stop end face 303.

[0042] The structure of left positioning block 2 is shown in Figure 7 , a through hole 201 is opened.

[0043] The structure of right positioning shaft 11 is shown in Figure 8 , including: square face 1101, cylindrical surface 1102, external thread 1103.

[0044] The structure of right limb arch height block 12 is shown in Figure 9 , including: through hole 1201, through end face 1202, stop end face 1203.

[0045] The structure of total length block 13 is shown in Figure 10As shown, it includes through hole 1301, through end surface 1302, and stop end surface 1303.

[0046] The structure of the right positioning block 14 is as shown in the figure. Figure 11 As shown, a through hole 1401 is provided.

[0047] The structure of the center positioning shaft 21 is as shown in the figure. Figure 12 As shown, it includes first external thread 2101, first cylindrical surface 2102, second cylindrical surface 2103, and second external thread 2104.

[0048] The structure of the middle limb width measuring block 19 is as shown in the figure. Figure 13 As shown, it includes through end surface 1901, through hole 1902, and stop end surface 1903.

[0049] The structure of the elastic travel measuring block 17 is as shown in the figure. Figure 14 As shown, it includes internal threaded hole 1701, waist-shaped hole 1702, stop end surface 1703, and through end surface 1704.

[0050] The structure of the back plate 5 is as shown in the figure. Figure 15 As shown, it includes first through hole 501 and second through hole 502.

[0051] The structure of the middle limb tail end arc segment spacing measuring block 9 is as shown in the figure. Figure 16 As shown, it includes through end cylindrical surface 901, through hole 902, and stop end cylindrical surface 903.

[0052] The structure of the front positioning shaft 15 is as shown in the figure. Figure 17 As shown, it includes square surface 1501, cylindrical surface 1502, and external thread 1503.

[0053] The structure of the two-limb width measuring block 16 is as shown in the figure. Figure 18 As shown, it includes through end surface 1601, through hole 1602, and stop end surface 1603.

[0054] The structure of the rear positioning shaft 10 is as shown in the figure. Figure 19 As shown, it includes threaded surface 1001, cylindrical surface 1002, and square surface 1003.

[0055] The structure of the middle limb lower end height measuring block 7 is as shown in the figure. Figure 20 As shown, it includes stop end surface 701, through end surface 702, centering notch 703, and step 704.

[0056] The assembly of the heavy load elastic strip comprehensive size detection platform according to the present application is as follows:

[0057] Four support bolts 22 are respectively installed in four threaded holes 112 on the lower surface of the reference base plate 1 to ensure the upper surface to be horizontal; the inner hexagonal bolt 25 is used to fix the back plate 5 to the reference base plate 1 through the second through hole 502 of the back plate 5 and the threaded hole 113; the rear positioning shaft 10 is used to connect the middle limb tail end circular arc segment spacing block 9 to the back plate 5 through the first through hole 501 of the back plate 5 and the through hole 902 of the middle limb tail end circular arc segment spacing block 9, and the middle limb tail end circular arc segment spacing block 9 can rotate around the axis of the positioning shaft 10.

[0058] The middle limb lower end height block 7 is installed through the long hole stepped groove 103, the step 704 is matched with the long hole stepped groove 103, the inner hexagonal bolt 25 is used to fix the cover plate 24 to the lower surface of the reference base plate 1, and the middle limb lower end height block 7 can slide left and right in the long hole stepped groove 103.

[0059] The left positioning block 2 is embedded in the long groove 101 of the reference base plate 1, the left positioning shaft 4 is used to fix the left limb arch height block 3 and the left positioning block 2 to the reference base plate 1 through the through hole 301 of the left limb arch height block 3 and the through hole 201 of the left positioning block 2, and the height of the cylindrical surface 402 of the left positioning shaft 4 is slightly higher than the sum of the heights of the left limb arch height block 3 and the left positioning block 2, so that the left limb arch height block 3 can rotate around the axis of the left positioning shaft 4.

[0060] The right positioning shaft 11 is used to fix the right limb arch height block 12, the total length block 13 and the right positioning block 14 to the reference base plate 1 through the through hole 1201 of the right limb arch height block 12, the through hole 1301 of the total length block 13 and the through hole 1401 of the right positioning block 14, and the height of the cylindrical surface 1102 of the right positioning shaft 11 is slightly higher than the sum of the heights of the right limb arch height block 12, the total length block 13 and the right positioning block 14, so that the right limb arch height block 12 and the total length block 13 can rotate around the axis of the right positioning shaft 11.

[0061] The front positioning shaft 15 is used to connect the two limb width block 16 to the reference base plate 1 through the threaded hole 108 of the reference base plate 1, and the height of the cylindrical surface 1502 of the front positioning shaft 15 is slightly higher than the height of the two limb width block 16, so that the two limb width block 16 can rotate around the axis of the front positioning shaft 15.

[0062] The elastic range block handle 18 is fixed on the elastic range block 17 by screwing, the elastic range block 17 is embedded in the long groove 110 of the reference base plate 1, the center positioning shaft 21 passes through the through hole 1902 of the middle limb width block 19 and the waist-shaped hole 1702 of the elastic range block 17, and the middle limb width block 19 and the elastic range block 17 are connected with the reference base plate 1 by cooperating the through hole 109 of the reference base plate 1, the hexagonal nuts 20 and 23. The height of the cylindrical surface 2103 of the center positioning shaft 21 is slightly higher than the sum of the height of the middle limb width block 19 and the elastic range block 17, the elastic range block 17 can slide forward and backward in the square groove 110, and the middle limb width block 19 can make circular motion around the axis of the center positioning shaft 21.

[0063] The detection principle of the heavy load elastic strip comprehensive size detection platform is as follows:

[0064] The heavy load elastic strip comprehensive size detection platform can detect eight sizes, including the middle limb width A of the elastic strip, the two limb widths B, the two limb arch height C, the middle limb lower end height D, the elastic range E, the middle limb tail end circular segment spacing F, the two limb spacing G and the total length H. Figure 22 As shown in the figure.

[0065] The detection sequence of the heavy load elastic strip comprehensive size detection platform is as follows:

[0066] First, the detection of the middle limb lower end height D: adjust the middle limb lower end height block 7 left and right, so that the centering notch 703 is 5-10 cm to the right of the centering notch 111 of the reference base plate 1. Place the heavy load elastic strip 6 on the upper surface of the reference base plate 1, with the two ends of the elastic strip tightly abutting the back plate 5 and the reference plane of the reference base plate 1, and the middle limb of the elastic strip being placed within the width range of the through end surface 702 of the middle limb lower end height block 7. Observe whether the middle limb lower end of the elastic strip contacts the through end surface 702 of the middle limb lower end height block 7. If not, it meets the minimum size requirement of the middle limb lower end height D, and if it does, it means that the middle limb lower end height D is too small and is unqualified. Keep the elastic strip 6 stationary and move the middle limb lower end height block 7 left and right, and observe whether the end surface 701 interferes with the middle limb lower end of the elastic strip. If it does, it meets the maximum size requirement of the middle limb lower end height D, and if it does not, it means that the middle limb lower end height D is too large and is unqualified.

[0067] II. Detection of the two limbs arch height C: adjust the middle limb lower end height block 7 to the left and right, make the centering notch 703 align with the centering notch 111 of the reference base plate 1, ensure the middle limb lower end height block 7 is placed in the center, move the elastic strip to the left to make the elastic strip left limb contact the left positioning block 2 side, and ensure the two ends are close to the reference plane of the back plate 5 and the reference base plate 1. Rotate the left limb arch height block 3 and the right limb arch height block 12, if the through end face 302 of the left limb arch height block 3 and the through end face 1202 of the right limb arch height block 12 both pass (the rotation process does not interfere with the elastic strip), then the maximum size requirement of the two limbs arch height C is met, if not, it means that the size of the two limbs arch height C is too large, which is unqualified; if the end face 303 and 1203 do not pass, then the minimum size requirement of the two limbs arch height C is met, if they pass, it means that the size of the two limbs arch height C is too small, which is unqualified.

[0068] III. Detection of the total length H: rotate the total length block 13, if the through end face 1302 of the total length block 13 passes (the rotation process does not interfere with the elastic strip), then the maximum size requirement of the total length H is met, if not, it means that the size of the total length H is too large, which is unqualified; if the end face 1303 does not pass, then the minimum size requirement of the total length H is met, if it passes, it means that the size of the total length H is too small, which is unqualified.

[0069] IV. Detection of the middle limb tail end arc segment spacing F: rotate the middle limb tail end arc segment spacing block 9, if the through end cylindrical surface 901 passes through the gap between the middle limb tail end arc segments of the elastic strip, then the minimum size requirement of the middle limb tail end arc segment spacing F is met, if not, it means that the size of the middle limb tail end arc segment spacing F is too small, which is unqualified; if the end cylindrical surface 903 does not pass, then the maximum size requirement of the middle limb tail end arc segment spacing F is met, if it passes, it means that the size of the middle limb tail end arc segment spacing F is too large, which is unqualified.

[0070] V. Detection of the middle limb width A and the two limbs width B: rotate the middle limb width block 19, if the through end face 1901 of the middle limb width block 19 passes (the rotation process does not interfere with the elastic strip), then the maximum size requirement of the middle limb width A is met, if not, it means that the size of the middle limb width A is too large, which is unqualified; if the end face 1903 does not pass, then the minimum size requirement of the middle limb width A is met, if it passes, it means that the size of the middle limb width A is too small, which is unqualified.

[0071] Rotate the two limbs width block 16, if the through end face 1601 of the two limbs width block 16 passes (the rotation process does not interfere with the elastic strip), then the maximum size requirement of the two limbs width B is met, if not, it means that the size of the two limbs width B is too large, which is unqualified; if the end face 1603 does not pass, then the minimum size requirement of the two limbs width B is met, if it passes, it means that the size of the two limbs width B is too small, which is unqualified.

[0072] Six, the detection of the spring range E: move the spring range block 17 forward, if the through end surface 1704 passes the lower end of the middle limb of the spring strip, then the minimum size requirement of the spring range E is met, if not, it means that the size of the spring range E is too small, and it is unqualified; when the through end surface 1704 passes, continue to move the spring range block 17 forward, if the stop end surface 1703 does not pass, then the maximum size requirement of the spring range E is met, if it passes, it means that the size of the spring range E is too large, and it is unqualified.

[0073] Seven, the detection of the distance G between the two limbs: as shown in Figure 21 the figure, after the detection of the spring range E is completed, keep the spring range block 17 still, move the spring strip 6 right until the right toe end surface of the spring strip contacts the left side surface of the spring range block 17 (the middle limb lower end height block 7 can move along), and the two ends of the spring strip keep close to the reference planes of the back plate 5 and the reference base plate 1. Observe the position of the right toe end surface of the spring strip, if the right toe end surface of the spring strip is located between the scale line 105 and the scale line 106, it means that the distance G between the two limbs meets the size requirement; if the right toe end surface of the spring strip is located to the left of the scale line 105, it means that the distance G between the two limbs is too small, and it is unqualified; if the right toe end surface of the spring strip is located to the right of the scale line 106, it means that the distance G between the two limbs is too large, and it is unqualified.

Claims

1. A heavy load spring strip comprehensive size detection platform, characterized in that: The utility model relates to a back plate and fixed reference base plate, back plate is provided with the middle limb tail end circular segment spacing gauge through rear positioning shaft on the back plate, be provided with left positioning block, right positioning block, middle limb lower end height gauge and elastic range gauge on the reference base plate, be provided with left limb arch height gauge through left positioning shaft on left positioning block, be provided with right limb arch height gauge and total length gauge through right positioning shaft on right positioning block, be provided with middle limb width gauge through center positioning shaft on elastic range gauge, be provided with two limb width gauges through front positioning shaft on the reference base plate, rear positioning shaft passes through the through hole of back plate and middle limb tail end circular segment spacing gauge, and the middle limb tail end circular segment spacing gauge is connected to back plate with the cooperation of hexagon nut, the long hole step groove is set up on the upper surface of reference base plate, and the step is set up on middle limb lower end height gauge, and middle limb lower end height gauge passes through long hole step groove, and the step cooperates with long hole step groove, the long groove is set up on the upper surface of reference base plate, and left positioning block is embedded in long groove, and left positioning shaft passes through the through hole of left limb arch height gauge and left positioning block, and left limb arch height gauge and left positioning block are fixed on reference base plate with the cooperation of the screw hole of reference base plate, right positioning shaft passes through the through hole of right limb arch height gauge, total length gauge and right positioning block in proper order, and right limb arch height gauge, total length gauge and right positioning block are fixed on reference base plate with the cooperation of the screw hole of reference base plate, front positioning shaft passes through the through hole of two limb width gauges, and two limb width gauges are connected with reference base plate with the cooperation of the screw hole of reference base plate, the square groove is set up on the upper surface of reference base plate, and elastic range gauge is embedded in square groove, and center positioning shaft passes through the through hole of middle limb width gauge and the waist-shaped hole of elastic range gauge, and middle limb width gauge and elastic range gauge are connected with reference base plate with the cooperation of the through hole of reference base plate and hexagon nut, and the centering notch, first scale line and second scale line are set up on the upper surface of reference base plate.

2. The heavy load spring strip comprehensive size detection platform according to claim 1, wherein: The elastic range gauge handle is fixed on the elastic range gauge through screw connection.

3. A method for detecting the overall size of a heavy load strip based on the detection platform of claim 1, characterized in that: The utility model relates to a back plate and fixed reference base plate, back plate is provided with the middle limb tail end circular segment spacing gauge through rear positioning shaft on the back plate, be provided with left positioning block, right positioning block, middle limb lower end height gauge and elastic range gauge on the reference base plate, be provided with left limb arch height gauge through left positioning shaft on left positioning block, be provided with right limb arch height gauge and total length gauge through right positioning shaft on right positioning block, be provided with middle limb width gauge through center positioning shaft on elastic range gauge, be provided with two limb width gauges through front positioning shaft on the reference base plate, rear positioning shaft passes through the through hole of back plate and middle limb tail end circular segment spacing gauge, and the middle limb tail end circular segment spacing gauge is connected to back plate with the cooperation of hexagon nut, the long hole step groove is set up on the upper surface of reference base plate, and the step is set up on middle limb lower end height gauge, and middle limb lower end height gauge passes through long hole step groove, and the step cooperates with long hole step groove, the long groove is set up on the upper surface of reference base plate, and left positioning block is embedded in long groove, and left positioning shaft passes through the through hole of left limb arch height gauge and left positioning block, and left limb arch height gauge and left positioning block are fixed on reference base plate with the cooperation of the screw hole of reference base plate, right positioning shaft passes through the through hole of right limb arch height gauge, total length gauge and right positioning block in proper order, and right limb arch height gauge, total length gauge and right positioning block are fixed on reference base plate with the cooperation of the screw hole of reference base plate, front positioning shaft passes through the through hole of two limb width gauges, and two limb width gauges are connected with reference base plate with the cooperation of the screw hole of reference base plate, the square groove is set up on the upper surface of reference base plate, and elastic range gauge is embedded in square groove, and center positioning shaft passes through the through hole of middle limb width gauge and the waist-shaped hole of elastic range gauge, and middle limb width gauge and elastic range gauge are connected with reference base plate with the cooperation of the through hole of reference base plate and hexagon nut, and the centering notch, first scale line and second scale line are set up on the upper surface of reference base plate. The elastic range gauge handle is fixed on the elastic range gauge through screw connection. The utility model relates to a back plate and fixed reference base plate, back plate is provided with the middle limb tail end circular segment spacing gauge through rear positioning shaft on the back plate, be provided with left positioning block, right positioning block, middle limb lower end height gauge and elastic range gauge on the reference base plate, be provided with left limb arch height gauge through left positioning shaft on left positioning block, be provided with right limb arch height gauge and total length gauge through right positioning shaft on right positioning block, be provided with middle limb width gauge through center positioning shaft on elastic range gauge, be provided with two limb width gauges through front positioning shaft on the reference base plate, rear positioning shaft passes through the through hole of back plate and middle limb tail end circular segment spacing gauge, and the middle limb tail end circular segment spacing gauge is connected to back plate with the cooperation of hexagon nut, the long hole step groove is set up on the upper surface of reference base plate, and the step is set up on middle limb lower end height gauge, and middle limb lower end height gauge passes through long hole step groove, and the step cooperates with long hole step groove, the long groove is set up on the upper surface of reference base plate, and left positioning block is embedded in long groove, and left positioning shaft passes through the through hole of left limb arch height gauge and left positioning block, and left limb arch height gauge and left positioning block are fixed on reference base plate with the cooperation of the screw hole of reference base plate, right positioning shaft passes through the through hole of right limb arch height gauge, total length gauge and right positioning block in proper order, and right limb arch height gauge, total length gauge and right positioning block are fixed on reference base plate with the cooperation of the screw hole of reference base plate, front positioning shaft passes through the through hole of two limb width gauges, and two limb width gauges are connected with reference base plate with the cooperation of the screw hole of reference base plate, the square groove is set up on the upper surface of reference base plate, and elastic range gauge is embedded in square groove, and center positioning shaft passes through the through hole of middle limb width gauge and the waist-shaped hole of elastic range gauge, and middle limb width gauge and elastic range gauge are connected with reference base plate with the cooperation of the through hole of reference base plate and hexagon nut, and the centering notch, first scale line and second scale line are set up on the upper surface of reference base plate. The elastic range gauge handle is fixed on the elastic range gauge through screw connection. The utility model relates to a back plate and fixed reference base plate, back plate is provided with the middle limb tail end circular segment spacing gauge through rear positioning shaft on the back plate, be provided with left positioning block, right positioning block, middle limb lower end height gauge and elastic range gauge on the reference base plate, be provided with left limb arch height gauge through left positioning shaft on left positioning block, be provided with right limb arch height gauge and total length gauge through right positioning shaft on right positioning block, be provided with middle limb width gauge through center positioning shaft on elastic range gauge, be provided with two limb width gauges through front positioning shaft on the reference base plate, rear positioning shaft passes through the through hole of back plate and middle limb tail end circular segment spacing gauge, and the middle limb tail end circular segment spacing gauge is connected to back plate with the cooperation of hexagon nut, the long hole step groove is set up on the upper surface of reference base plate, and the step is set up on middle limb lower end height gauge, and middle limb lower end height gauge passes through long hole step groove, and the step cooperates with long hole step groove, the long groove is set up on the upper surface of reference base plate, and left positioning block is embedded in long groove, and left positioning shaft passes through the through hole of left limb arch height gauge and left positioning block, and left limb arch height gauge and left positioning block are fixed on reference base plate with the cooperation of the screw hole of reference base plate, right positioning shaft passes through the through hole of right limb arch height gauge, total length gauge and right positioning block in proper order, and right limb arch height gauge, total length gauge and right positioning block are fixed on reference base plate with the cooperation of the screw hole of reference base plate, front positioning shaft passes through the through hole of two limb width gauges, and two limb width gauges are connected with reference base plate with the cooperation of the screw hole of reference base plate, the square groove is set up on the upper surface of reference base plate, and elastic range gauge is embedded in square groove, and center positioning shaft passes through the through hole of middle limb width gauge and the waist-shaped hole of elastic range gauge, and middle limb width gauge and elastic range gauge are connected with II. Detection of the two-limb arch height C: Adjust the height of the lower end of the middle limb, align the center mark of the height of the lower end of the middle limb with the center mark of the reference base plate, and ensure that the height of the lower end of the middle limb is placed in the center. Move the spring bar to the left so that the left limb of the spring bar contacts the side of the left positioning block, and ensure that the two ends are tightly attached to the reference plane of the back plate and the reference base plate. Rotate the left limb arch height gauge and the right limb arch height gauge. If the through end surface of the left limb arch height gauge and the right limb arch height gauge passes, it is determined that the maximum size of the two-limb arch height C is qualified. If it does not pass, it is determined that the size of the two-limb arch height C is too large and unqualified. If the stop end surface of the left limb arch height gauge and the right limb arch height gauge does not pass, it is determined that the minimum size of the two-limb arch height C is qualified. If it passes, it is determined that the size of the two-limb arch height C is too small and unqualified. III. Detection of the total length H: The detection method is the same as that of the two-limb arch height C. Rotate the total length gauge, and determine whether the maximum size and the minimum size of the total length H are qualified according to whether the through end surface and the stop end surface of the total length gauge pass. IV. Detection of the middle limb tail end arc segment spacing F: Rotate the middle limb tail end arc segment spacing gauge. If the through end cylindrical surface of the middle limb tail end arc segment spacing gauge passes through the spring bar middle limb tail end arc segment gap, it is determined that the minimum size of the middle limb tail end arc segment spacing F is qualified. If it does not pass, it is determined that the size of the middle limb tail end arc segment spacing F is too small and unqualified. If the stop end cylindrical surface of the middle limb tail end arc segment spacing gauge does not pass, it is determined that the maximum size of the middle limb tail end arc segment spacing F is qualified. If it passes, it is determined that the size of the middle limb tail end arc segment spacing F is too large and unqualified. V. Detection of the middle limb width A and the two-limb width B: The detection method is the same as that of the two-limb arch height C. Rotate the middle limb width gauge and the two-limb width gauge respectively, and determine whether the maximum size and the minimum size of the middle limb width A and the two-limb width B are qualified according to whether the through end surface and the stop end surface pass. VI. Detection of the spring travel E: Move the spring travel gauge forward. If the through end surface of the spring travel gauge passes through the middle limb lower end of the spring bar, it is determined that the minimum size of the spring travel E is qualified. If it does not pass, it is determined that the size of the spring travel E is too small and unqualified. After the through end surface of the spring travel gauge passes, continue to move the spring travel gauge forward. If the stop end surface of the spring travel gauge does not pass, it is determined that the maximum size of the spring travel E is qualified. If it passes, it is determined that the size of the spring travel E is too large and unqualified. VII. Detection of the two-limb spacing G: After the spring travel E is detected, keep the spring travel gauge stationary and move the spring bar to the right until the right toe end surface of the spring bar contacts the left side surface of the spring travel gauge. Keep the two ends of the spring bar tightly attached to the reference plane of the back plate and the reference base plate. Observe the position of the right toe end surface of the spring bar. If the right toe end surface of the spring bar is located between the first scale line and the second scale line, it is determined that the size of the two-limb spacing G is qualified. If the right toe end surface of the spring bar is located to the left of the first scale line, it is determined that the size of the two-limb spacing G is too small and unqualified. If the right toe end surface of the spring bar is located to the right of the second scale line, it is determined that the size of the two-limb spacing G is too large and unqualified.

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