CN219810383U - Measuring device for step depth of air valve hole of cylinder cover - Google Patents
Measuring device for step depth of air valve hole of cylinder cover Download PDFInfo
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- CN219810383U CN219810383U CN202320861753.6U CN202320861753U CN219810383U CN 219810383 U CN219810383 U CN 219810383U CN 202320861753 U CN202320861753 U CN 202320861753U CN 219810383 U CN219810383 U CN 219810383U
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- 230000006835 compression Effects 0.000 claims abstract description 29
- 238000007906 compression Methods 0.000 claims abstract description 29
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 description 7
- 238000003825 pressing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The measuring device comprises a compression ring, an upper supporting sleeve, a spring, an adjusting bolt and a lower supporting rod; the upper support sleeve and the lower support rod are arranged in the air valve hole, the height of the lower support rod is equal to that of the upper support sleeve and extends into the upper support sleeve to slide, the adjusting bolt is connected with the lower support rod and supports the upper support sleeve, the spring is clamped between the head of the adjusting bolt and the lower support rod, the compression ring is sleeved on and pressed on the upper support sleeve, the lower end face of the upper support sleeve is connected with the air valve hole and is pushed to be clung to the bottom end face of the upper inner hole in a downward rotating mode, and meanwhile the spring pushes the lower end face of the lower support rod to be clung to the bottom end face of the lower inner hole by means of elasticity; and measuring the distance between the upper end face of the upper support sleeve and the upper end face of the lower support rod, wherein the obtained equivalent measured value is equal to the step depth of the air valve hole. The utility model has the advantages of convenient measurement, accurate result and strong universality.
Description
Technical Field
The utility model relates to size measurement of mechanical parts, in particular to a measuring device for the step depth of an air valve hole of a cylinder cover, and belongs to the technical field of mechanical manufacturing.
Background
The cylinder head is one of the important parts of a high-power low-speed marine diesel engine. Referring to fig. 1, a block diagram of a 6G70GI cylinder head is shown, the overall dimensions of the cylinder head comprising: the diameter of the large outer circle is 1230mm, the height is 620mm, and the weight is about 2.5 tons; the valve opening 2 is one of the important openings in the cylinder head, and the valve opening 2 is at an oblique angle to the large end face 1 of the cylinder head. Referring to fig. 2, the air valve hole 2 is a stepped hole, an internal thread 21 is disposed near the hole, and the step depth L of the bottom end surface 22 of the upper inner hole and the bottom end surface 23 of the lower inner hole has a tolerance of 6 steps.
The step depth L is measured during machining of the cylinder head. The conventional measuring method is to measure the depths of the distances between the upper inner hole bottom end surface 22 and the lower inner hole bottom end surface 23 and the cylinder head large end surface 1 by using a depth gauge, respectively, and then to subtract the depth L of the step, but the method is difficult to implement because the axis of the air valve hole 2 forms an oblique angle with the cylinder head large end surface 1. If a three-coordinate measuring method is adopted, the dead weight of the cylinder cover is too large, so that the whole process is extremely low in working efficiency, time-consuming and labor-consuming, high in process cost and greatly reduced in production economic benefit.
Disclosure of Invention
The utility model aims to solve the technical problem of overcoming the defects of the prior art, and provides a measuring device for the step depth of a cylinder cover air valve hole, which is used for converting the measurement of the step depth in the air valve hole into the measurement of the corresponding physical dimension on the measuring device, avoiding the influence of the inclined arrangement of the air valve hole on the large end surface of the cylinder cover, completing the accurate measurement of the step depth of the air valve hole, and achieving the purposes of convenient and quick operation, and improving the working efficiency and the measurement result.
Based on the above purpose, the technical scheme adopted by the utility model is as follows:
a measuring device for cylinder head gas valve hole step degree of depth, the gas valve hole is the step hole, and by the last hole of major diameter and the lower hole of minor diameter meet and form, this gas valve hole's axis with the major surface of cylinder head becomes an oblique angle and drill way department is equipped with the internal thread, the bottom face of going up the hole is the step degree of depth to the distance of the bottom face of hole down, its characterized in that: the measuring device comprises a compression ring, an upper supporting sleeve, a spring, an adjusting bolt and a lower supporting rod; the upper support sleeve is arranged in the upper inner hole, the lower support rod is arranged in the lower inner hole, the height of the lower support rod is equal to that of the upper support sleeve, the lower support rod stretches into the upper support sleeve and can slide in the support sleeve, the adjusting bolt is connected with the lower support rod, the top end of the adjusting bolt supports the upper support sleeve, the spring sleeve is arranged on the periphery of the adjusting bolt and is clamped between the head of the adjusting bolt and the lower support rod, the compression ring is sleeved on and pressed on the upper support sleeve, the compression ring is connected to the upper part of the air valve hole through threads and pushes the lower end face of the upper support sleeve to be tightly attached to the bottom end face of the upper inner hole in a downward rotating mode, and meanwhile the upper support sleeve pushes the lower support rod through the adjusting bolt and by means of the elastic force of the spring, so that the lower end face of the lower support rod is tightly attached to the bottom end face of the lower inner hole;
and measuring the distance between the upper end face of the upper support sleeve and the upper end face of the lower support rod, wherein the obtained equivalent measured value is equal to the step depth of the air valve hole.
Further, the upper end of the compression ring is 30-50 mm higher than the big end face of the cylinder cover, and the upper end face of the upper support sleeve is higher than the upper end of the compression ring.
Further, the upper end face of the upper support sleeve is parallel to the lower end face, and the upper end face of the lower support rod is parallel to the lower end face.
Further, the upper part of the periphery of the compression ring is knurled, and the lower part is an external thread screwed with the internal thread of the air valve hole.
Further, the diameter of the lower support rod and the height and diameter of the upper support sleeve are determined according to the measured size of the valve hole.
Further, go up the support cover and be the cylindrical component of step, including last cylinder and lower cylinder, this lower cylinder is equipped with the external shoulder with the junction of last cylinder, should go up the inside of support cover and be equipped with the step hole, including path hole and major diameter hole, this major diameter hole with the junction of path hole is equipped with the interior terminal surface, go up the lower terminal surface of support cover be with the bottom surface closely laminating of hole is first locating surface, the up end is the first measuring surface that is used as the measurement benchmark.
Further, a central hole is formed in the compression ring, the central hole and the upper cylinder of the upper support sleeve form clearance fit, and the bottom end of the compression ring is propped against the outer shoulder of the upper support sleeve.
Further, the lower support rod is a step shaft and comprises a round rod part and a positioning part, the round rod part stretches into the small-diameter inner hole of the upper support sleeve and forms a clearance fit capable of sliding up and down, the upper end face of the round rod part is a second measuring face serving as a measuring reference, a boss part is arranged in the middle of the round rod part, a connecting hole for penetrating the adjusting bolt is formed in the boss part, the positioning part and the lower inner hole of the air valve hole form a clearance fit, and the lower end of the positioning part is a second positioning face tightly attached to the bottom end face of the lower inner hole.
Further, the adjusting bolt comprises a screw rod and a nut, the screw rod is arranged in the connecting hole of the boss part of the lower supporting rod in a penetrating mode, the top of the screw rod is a screw rod head which abuts against the inner end face of the upper supporting sleeve, threads for connecting the nut are arranged on the lower portion of the screw rod, the nut and the screw rod head are respectively arranged on the upper side and the lower side of the boss part, and the spring clamp is arranged between the screw rod head and the boss part.
The beneficial effects of the utility model are as follows:
1) The utility model is not affected by the skew of the large end surface of the air valve hole and the cylinder cover, and the measurement of the step depth in the air valve hole is converted into the measurement of the corresponding physical dimension on the measuring device, thereby achieving the purpose of improving the working efficiency.
2) The measuring device can accurately measure the step depth of the air valve hole, fully meets the production requirement, and achieves the effect of accurate measuring results.
3) The utility model has strong universality, and can be suitable for measuring the air valve holes with different sizes of various machine types in a certain range only by changing the sizes of all the components.
4) The utility model has simple structure and convenient operation, and is not limited by the level of operators.
Drawings
Fig. 1 is a schematic view of a cylinder head.
Figure 2 is a cross-sectional view of the air valve orifice.
FIG. 3 is a schematic diagram of the present utility model.
Fig. 4 is a schematic view of the structure of the upper support sleeve.
Fig. 5 is a schematic view of the construction of the clamp ring.
Fig. 6 is a schematic view of the structure of the lower support bar.
Fig. 7 is a schematic view of the spring and adjusting bolt.
Fig. 8 is a state diagram of the use of the present utility model.
In the figure: l-step depth, L' -equivalent measurement value, H-upper support sleeve height, H-lower support rod height, 1-cylinder head big end face, 2-air valve hole, 21-internal thread, 22-upper inner hole bottom end face, 23-lower inner hole bottom end face, 3-clamp ring, 31-central hole, 32-external thread, 4-upper support sleeve, 41-upper cylinder, 42-lower cylinder, 43-outer shoulder, 44-small diameter inner hole, 45-big diameter inner hole, 46-inner end face, 47-first measurement face, 48-first positioning face, 5-spring, 6-adjusting bolt, 61-screw, 62-nut, 63-screw head, 64-thread, 7-lower support rod, 71-round rod portion, 72-positioning portion, 73-boss portion, 74-second measurement face, 75-connecting hole, 76-second positioning face.
Detailed Description
Referring to fig. 2, the air valve hole 2 is shown as a stepped hole, and comprises an upper inner hole and a lower inner hole which are coaxially connected, wherein the diameter of the upper inner hole is larger than that of the lower inner hole, and the axis of the air valve hole 2 forms an oblique angle with the large end surface 1 of the air cylinder cover; the air valve hole 2 is provided with an internal thread 21 near the hole opening of the upper inner hole, and the distance between the bottom end surface 22 of the upper inner hole and the bottom end surface 23 of the lower inner hole is the step depth L, which is the measuring object of the utility model.
The present utility model is described in detail below with reference to the drawings and examples, which are not intended to limit the scope of the present utility model, but all equivalent variations and modifications according to the content of the present application are within the scope of the present utility model.
Examples
Referring to fig. 3, the measuring device includes: the device comprises a compression ring 3, an upper support sleeve 4, a spring 5, an adjusting bolt 6 and a lower support rod 7.
Referring to fig. 2 and 8 in combination, the lower support rod 7 is mounted in the lower inner hole of the air valve hole 2, the lower end surface is in contact with the bottom end surface 23 of the lower inner hole, the upper support sleeve 4 is mounted in the upper inner hole of the air valve hole 2, the lower end surface is in contact with the bottom end surface 22 of the upper inner hole, the upper support sleeve 4 is sleeved on the lower support rod 7 and can slide mutually, the adjusting bolt 6 is connected to the lower support rod 7, the top end of the adjusting bolt 4 is supported by the adjusting bolt 6, the spring 5 is sleeved on the periphery of the adjusting bolt 6 and is clamped between the head of the adjusting bolt 6 and the lower support rod 7, the spring 5 pushes the lower support rod 7 to enable the lower end surface of the lower support rod to be clung to the bottom end surface 23 of the lower inner hole, the pressing ring 3 is connected to the upper part of the upper inner hole through threads and sleeved on the upper support sleeve 4, the pressing ring 3 is pressed on the upper support sleeve 4 and enables the lower end surface of the upper support sleeve 4 to be clung to the bottom end surface 22 of the upper inner hole, and the distance L ' between the measuring distance L ' of the upper support rod and the upper end surface 7 is equal to the measured value L ' of the air valve hole.
Referring to fig. 4, the upper support sleeve 4 is a stepped cylindrical member, and includes an upper cylinder 41 and a lower cylinder 42 which are coaxial, the diameter of the lower cylinder 42 is larger than that of the upper cylinder 41, and an outer shoulder 43 is provided at the connection between the lower cylinder 42 and the upper cylinder 41; the inside of the upper support sleeve 4 is provided with a step inner hole, which is formed by connecting a coaxial small-diameter inner hole 44 and a large-diameter inner hole 45, the aperture of the large-diameter inner hole 45 at the lower part is larger than that of the small-diameter inner hole 44 at the upper part, and the connecting part of the large-diameter inner hole 45 and the small-diameter inner hole 44 is provided with an inner end surface 46. The lower end surface of the upper support sleeve 4 is a first positioning surface 48, and is tightly attached to the bottom end surface 22 of the upper inner hole, the upper end surface is a first measuring surface 47, and the first measuring surface 47 is parallel to the first positioning surface 48 as a reference for measuring by using a depth gauge. The height H of the upper support sleeve 4 and the diameter of the lower cylinder 42 are determined according to the measured size of the air valve hole 2.
Referring to fig. 5, the compression ring 3 is a circular member, and has a through central hole 31 therein, which is in clearance fit with the upper cylinder 41 of the upper support sleeve 4, and the upper portion of the outer periphery of the compression ring 3 is knurled for rotationally applying force, and the lower portion is an external thread 32 for screwing with the internal thread 21 on the upper inner hole of the air valve hole 2.
After the compression ring 3 is screwed into the air valve hole 2, the bottom end is pressed on the outer shoulder 43 of the upper support sleeve 4, and the first positioning surface 48 of the lower end surface of the upper support sleeve 4 is tightly attached to the bottom end surface 22 of the upper inner hole. After the compression ring 3 and the upper support sleeve 4 are installed in the air valve hole 2, referring to fig. 8, the upper end of the compression ring 3 is about 30-50 mm higher than the large end surface 1 of the cylinder head, and the first measuring surface 47 of the upper end surface of the upper support sleeve 4 is higher than the upper end of the compression ring 3, so as to facilitate the measurement operation.
Referring to fig. 6, the lower support rod 7 is a stepped shaft, and is formed by coaxially connecting a small diameter circular rod portion 71 at the upper portion with a large diameter positioning portion 72 at the lower portion. The round rod part 71 extends into the small-diameter inner hole 44 of the upper support sleeve 4 and slides up and down in the small-diameter inner hole 44, the round rod part 71 and the small-diameter inner hole 44 form clearance fit, and the upper end surface of the round rod part 71 is a second measuring surface 74 which is used as a reference for measurement by using a depth gauge; the positioning portion 72 is disposed in the lower inner hole of the air valve hole 2, the lower end surface of the positioning portion 72 is a second positioning surface 76, and is attached to the bottom end surface 23 of the lower inner hole, the second positioning surface 76 is parallel to the second measuring surface 74, the diameter of the positioning portion 72 is determined according to the measured size of the air valve hole 2, and the positioning portion 72 and the lower inner hole of the air valve hole 2 form clearance fit or transition fit. The middle part of the round rod part 71 is provided with a boss part 73, and the boss part 73 is provided with a connecting hole 75 for penetrating the adjusting bolt 6. The height H of the lower support rod 7 is equal to the height H of the upper support sleeve 4.
The number of the springs 5 and the adjusting bolts 6 may be more than one, and the springs may be symmetrically connected to the boss portion 73 of the lower support rod 7. Referring to fig. 7, the adjusting bolt 6 includes a screw 61 and a nut 62, the top of the screw 61 is a screw head 63, and the lower portion is provided with threads 64; the screw 61 is inserted into the connecting hole 75 of the boss 73 of the lower support rod 7, the nut 62 is screwed on the screw thread 64 at the lower end of the screw 61, and is respectively positioned on the upper side and the lower side of the boss 73 with the screw head 63, and the top end of the screw head 63 is supported against the inner end surface 46 of the upper support sleeve 4. The spring 5 is a cylindrical pressure spring, is sleeved on the screw 61 and is clamped between the lower surface of the screw head 63 and the upper surface of the boss 73; the spring 5 pushes the lower support rod 7 by means of the screw head 63 fixed by the inner end surface 46, so that the second positioning surface 76 of the positioning part 72 is closely attached to the bottom end surface 23 of the lower inner hole.
The specific installation and use method of the utility model is as follows:
referring to fig. 8, the spring 5 is sleeved into the screw 61, the lower end of the screw 61 penetrates into the connecting hole 75 of the boss 73 of the lower support rod 7 from above, the nut 62 is screwed into the thread 64 of the screw 61 from below and is positioned below the boss 73, and thus the spring 5 is clamped between the screw head 63 and the boss 73; then the assembled lower support rod 7, the spring 5 and the adjusting bolt 6 are plugged into the cylinder cover air valve hole 2, the positioning part 72 of the lower support rod 7 falls into the lower inner hole of the air valve hole 2, then the upper support sleeve 4 is filled into the upper inner hole of the air valve hole 2, the small-diameter inner hole 44 of the upper support sleeve 4 is sleeved into the round rod part 71 of the lower support rod 7, and meanwhile, the screw head 63 of the adjusting bolt 6 is contacted with the inner end surface 46 of the upper support sleeve 4; then screwing the compression ring 3 into the upper inner hole of the air valve hole 2, pressing the bottom end of the compression ring onto the outer shoulder 43 of the upper support sleeve 4, continuing to downwards screw the compression ring 3 to push the upper support sleeve 4, enabling the first positioning surface 48 at the lower end to be tightly attached to the bottom end surface 22 of the upper inner hole of the air valve hole 2, synchronously pressing the adjusting bolt 6 by the inner end surface 46 of the upper support sleeve 4 in the pressing process, and pushing the boss 73 by the spring force of the spring 5, and enabling the second positioning surface 76 of the lower support rod 7 to be tightly attached to the bottom end surface 23 of the lower inner hole of the air valve hole 2; after the measuring device is installed in the air valve hole 2, the upper end of the compression ring 3 is about 30-50 mm higher than the large end surface 1 of the cylinder cover, and the first measuring surface 47 of the upper support sleeve 4 is higher than the upper end of the compression ring 3; finally, a depth gauge is adopted, the first measuring surface 47 is taken as a reference, the distance between the first measuring surface 47 and the second measuring surface 74 of the upper end surface of the lower supporting rod 7 is measured, and the measured equivalent measured value L' is the step depth L of the air valve hole 2 because the height H of the upper supporting sleeve 4 is equal to the height H of the lower supporting rod 7.
The scope of protection claimed in the present utility model is not limited to the embodiments described above, but also includes other variants and alternatives obvious to the present utility model.
Claims (9)
1. A measuring device for cylinder head gas valve hole step degree of depth, the gas valve hole is the step hole, and by the last hole of major diameter and the lower hole of minor diameter meet and form, this gas valve hole's axis with the major surface of cylinder head becomes an oblique angle and drill way department is equipped with the internal thread, the bottom face of going up the hole is the step degree of depth to the distance of the bottom face of hole down, its characterized in that: the measuring device comprises a compression ring, an upper supporting sleeve, a spring, an adjusting bolt and a lower supporting rod; the upper support sleeve is arranged in the upper inner hole, the lower support rod is arranged in the lower inner hole, the height of the lower support rod is equal to that of the upper support sleeve, the lower support rod stretches into the upper support sleeve and can slide in the support sleeve, the adjusting bolt is connected with the lower support rod, the top end of the adjusting bolt supports the upper support sleeve, the spring sleeve is arranged on the periphery of the adjusting bolt and is clamped between the head of the adjusting bolt and the lower support rod, the compression ring is sleeved on and pressed on the upper support sleeve, the compression ring is connected to the upper part of the air valve hole through threads and pushes the lower end face of the upper support sleeve to be tightly attached to the bottom end face of the upper inner hole in a downward rotating mode, and meanwhile the upper support sleeve pushes the lower support rod through the adjusting bolt and by means of the elastic force of the spring, so that the lower end face of the lower support rod is tightly attached to the bottom end face of the lower inner hole;
and measuring the distance between the upper end face of the upper support sleeve and the upper end face of the lower support rod, wherein the obtained equivalent measured value is equal to the step depth of the air valve hole.
2. The measuring device for cylinder head valve hole step depth according to claim 1, wherein: the upper end of the compression ring is 30-50 mm higher than the big end face of the cylinder cover, and the upper end face of the upper support sleeve is higher than the upper end of the compression ring.
3. The measuring device for cylinder head valve hole step depth according to claim 1, wherein: the upper end face of the upper support sleeve is parallel to the lower end face, and the upper end face of the lower support rod is parallel to the lower end face.
4. The measuring device for cylinder head valve hole step depth according to claim 1, wherein: the upper part of the periphery of the compression ring is knurled, and the lower part of the periphery of the compression ring is an external thread screwed with the internal thread of the air valve hole.
5. The measuring device for cylinder head valve hole step depth according to claim 1, wherein: the diameter of the lower support rod and the height and diameter of the upper support sleeve are determined according to the measured size of the valve hole.
6. The measuring device for cylinder head valve hole step depth according to claim 1, wherein: the upper support sleeve is a stepped cylindrical member and comprises an upper cylinder and a lower cylinder, an outer shoulder is arranged at the joint of the lower cylinder and the upper cylinder, a stepped inner hole is arranged in the upper support sleeve, the stepped inner hole comprises a small-diameter inner hole and a large-diameter inner hole, an inner end face is arranged at the joint of the large-diameter inner hole and the small-diameter inner hole, the lower end face of the upper support sleeve is a first positioning face tightly attached to the bottom end face of the upper inner hole, and the upper end face is a first measuring face serving as a measuring reference.
7. The measuring device for cylinder head valve hole step depth according to claim 6, wherein: the inside of clamp ring be equipped with the centre bore, this centre bore with go up the last cylinder of support cover forms clearance fit, the bottom of clamp ring supports and presses on the outer shoulder of last support cover.
8. The measuring device for cylinder head valve hole step depth according to claim 6, wherein: the lower support rod is a step shaft and comprises a round rod part and a positioning part, the round rod part stretches into a small-diameter inner hole of the upper support sleeve and forms a clearance fit capable of sliding up and down, the upper end face of the round rod part is a second measuring face serving as a measuring reference, a boss part is arranged in the middle of the round rod part, a connecting hole for penetrating the adjusting bolt is formed in the boss part, the positioning part and the lower inner hole of the air valve hole form a clearance fit, and the lower end of the positioning part is a second positioning face tightly attached to the bottom end face of the lower inner hole.
9. The measuring device for cylinder head valve hole step depth according to claim 8, wherein: the adjusting bolt comprises a screw rod and a nut, wherein the screw rod penetrates through a connecting hole of the boss part of the lower supporting rod, the top of the screw rod is a screw rod head which is abutted against the inner end face of the upper supporting sleeve, threads for connecting the nut are arranged at the lower part of the screw rod head, the nut and the screw rod head are respectively arranged on the upper side and the lower side of the boss part, and the spring clamp is arranged between the screw rod head and the boss part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320861753.6U CN219810383U (en) | 2023-04-18 | 2023-04-18 | Measuring device for step depth of air valve hole of cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320861753.6U CN219810383U (en) | 2023-04-18 | 2023-04-18 | Measuring device for step depth of air valve hole of cylinder cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219810383U true CN219810383U (en) | 2023-10-10 |
Family
ID=88211482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320861753.6U Active CN219810383U (en) | 2023-04-18 | 2023-04-18 | Measuring device for step depth of air valve hole of cylinder cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219810383U (en) |
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2023
- 2023-04-18 CN CN202320861753.6U patent/CN219810383U/en active Active
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