CN219200259U - Jumping dimension measuring device - Google Patents

Abstract

The utility model discloses a jumping dimension measuring device which is used for measuring the jumping dimension of a part shaft, wherein a central shaft of the outer cylindrical surface of the part shaft is a reference shaft, a deep small hole which is coaxially arranged with the reference shaft is formed in the part shaft, the device comprises a base, a clamping mechanism and a measuring mechanism, the clamping mechanism comprises a clamping block fixedly connected to the base and a clamping assembly arranged on the clamping block, the clamping block is used for placing the part shaft, and the clamping assembly is used for radially limiting the part shaft; the measuring mechanism comprises a fixed support fixedly connected to the base, a measuring lever rotationally connected to the fixed support and a measuring meter arranged on the fixed support, an arc-shaped part of the measuring lever is used for being in contact with the inner wall of the deep small hole, a contact part of the measuring lever is used for being abutted to the gauge head of the measuring meter, and the arc-shaped part and the contact part are symmetrically arranged at two ends of the center of the measuring lever. In addition, the component shaft can rotate along the axial direction, so that the jumping value of the deep small hole and the reference shaft can be measured, the operation is simple, and the measurement efficiency is high.

Description

Jumping dimension measuring device

Technical Field

The utility model relates to the technical field of jitter size measuring devices, in particular to a jitter size measuring device.

Background

Referring to fig. 1, for a part shaft to be measured, a deep small hole for facilitating assembly of the part shaft with other parts is formed in the part shaft, wherein a central shaft of an outer cylindrical surface of the part shaft is a reference shaft, the deep small hole cylindrical surface needs to be coaxially arranged with the reference shaft, in order to enable the part shaft to be coaxial with other parts during installation, it is required to ensure that the jumping sizes of a cylindrical surface of the deep small hole and the reference shaft meet design requirements, so that before the part shaft is used, the jumping sizes of the deep small hole and the reference shaft on the part shaft need to be measured to judge whether the jumping sizes of the cylindrical surface of the deep small hole and the reference shaft meet the design requirements or not, but the inner diameter of the deep small hole is phi 5mm (+ 0.025mm, 0) and the hole depth is 40mm (+ 0.5mm, 0), so that a common measuring tool cannot measure the jumping sizes of the cylindrical surfaces of different depths in the axial direction of the deep small hole and the reference shaft.

In the prior art, when the jumping values of the deep small holes on the part shaft and the reference shaft are measured, three-coordinate measurement is generally adopted, the three-coordinate measurement can be directly used for measuring each size of the part shaft, the measurement accuracy is high, but the outer cylindrical surface of the part shaft and the inner hole cylindrical surface of the deep small holes are required to be respectively collected in the measurement process, and then the size comparison is carried out to judge whether the jumping size meets the design requirement, so that the measurement consumption time is long, and a professional is required to measure, so that the measurement workload is large after the mass production of the parts.

Disclosure of Invention

The utility model provides a jump size measuring device, which aims to solve the technical problem of how to improve the measuring efficiency while ensuring the measuring precision of the jump size between a deep small hole on a part shaft and a reference shaft.

The utility model provides a jumping dimension measuring device which is used for measuring the jumping dimension of a part shaft, wherein the central shaft of the outer cylindrical surface of the part shaft is a reference shaft, a deep small hole which is coaxially arranged with the reference shaft is formed in the part shaft, the device comprises a base, a clamping mechanism and a measuring mechanism, the clamping mechanism comprises a clamping block fixedly connected to the base and a clamping assembly arranged on the clamping block, the clamping block is used for placing the part shaft and is attached to the outer cylindrical surface of the part shaft, and the clamping assembly is used for radially limiting the part shaft placed on the clamping block; the measuring mechanism comprises a fixed support fixedly connected to the base and corresponding to the clamping block, a measuring lever rotatably connected to the fixed support and a measuring meter arranged on the fixed support, wherein the first end of the measuring lever is provided with an arc-shaped portion used for being in contact with the inner wall of the deep small hole, the second end of the measuring lever is provided with a contact portion used for being in butt joint with the gauge head of the measuring meter, and the distance from the arc-shaped portion to the rotation center of the measuring lever is equal to the distance from the contact portion to the rotation center of the measuring lever.

Further, the clamping block is provided with a V-shaped groove for placing the part shaft, and the parallelism of the bottom surface of the clamping block and the reference shaft is less than or equal to 0.005mm.

Further, sliding grooves are correspondingly formed in two sides of the clamping block, the clamping assembly comprises a sliding block matched with the sliding grooves and locking screws in threaded connection with the sliding block, the sliding block is in sliding connection with the clamping block through the sliding grooves, and the locking screws penetrate through the sliding block and are used for being abutted to the outer cylindrical surface of the part shaft so that the part shaft is limited in the radial direction relative to the clamping block.

Further, a buffer portion for preventing the part shaft from being scratched is provided at an end of the locking screw toward the V-shaped groove.

Further, the fixed bolster includes support base, installing support and table frame, the both ends of installing support respectively with support the base with the table frame is connected, set up on the installing support and dodge the mouth, the measuring lever passes through cylindric lock rotation and connects dodge in the mouth, support the base with be formed with between the table frame be used for the second end movable work area of measuring the lever.

Further, a mounting hole for the gauge head of the measuring gauge to pass through is formed in the gauge stand, a gauge clamp screw used for fixing the measuring gauge is connected to the gauge stand in a threaded mode, and the gauge clamp screw stretches into the mounting hole to be abutted to the measuring gauge.

Further, a meter jacket is sleeved on the meter head of the measuring meter, the meter jacket is positioned in the mounting hole, and the meter jacket screw extends into the mounting hole to be abutted with the meter jacket.

Further, fixedly connected with regulating block on the installing support, offer on the support base and be used for holding the regulating groove of regulating block, threaded connection has conflict screw on the support base, conflict screw stretches into the regulating groove with the regulating block butt.

Further, the arc-shaped part is hemispherical, and the spherical surface of the arc-shaped part is used for being abutted with the inner wall of the deep small hole.

Further, the gauge head of the measuring gauge is abutted with the second end of the measuring lever, so that the measuring gauge is pressed down by 0.2-0.3 mm.

The utility model has the following beneficial effects:

in the jump size measuring device, the clamping block and the fixing support are correspondingly fixed on the base, the part shaft is fixed in a positioning way through the clamping mechanism, so that the measuring lever and the deep small hole are kept coaxial, the measuring lever stretches into the deep small hole, specifically, the part shaft is firstly placed on the clamping block, the outer cylindrical surface of the part shaft is attached to the clamping block, the first end of the measuring lever stretches into the deep small hole, at the moment, the arc-shaped part is abutted against the inner wall of the deep small hole, the second end of the measuring lever is the contact part for being abutted against the gauge head of the measuring gauge, and the clamping assembly is used for carrying out radial limiting on the part shaft, so that installation preparation before the jump size measurement between the deep small hole on the part shaft and the reference shaft is completed, and in order to ensure the measurement accuracy, the distance from the arc-shaped part to the rotation center of the measuring lever is equal to the distance from the contact part to the rotation center of the measuring lever. In the concrete measurement, the part shaft is rotated, so that the part shaft is attached to the clamping block to rotate, and the measured runout size data can be obtained by observing the change of the reading of the measuring meter. In order to improve the accuracy of the measured data, the axial position of the part shaft on the clamping block can be adjusted, namely the first end of the measuring lever stretches into the depth of the deep small hole to measure multiple groups of data of different depths, and the average value is taken, so that the accuracy of measuring the jump size data of the deep small hole is improved. Through the device, under the cooperation of clamping mechanism and measuring mechanism, only need make the part axle rotate along the axial, can measure the value of beating of dark aperture and reference shaft, because under clamping mechanism's effect, guaranteed the radial spacing of part axle to guaranteed the position of reference shaft unchangeable, with the stability of guaranteeing measurement accuracy, only need rotate the part axle simultaneously and can acquire the value of beating of dark aperture and reference shaft through the manometer, easy operation, measurement efficiency is fast. In summary, through above-mentioned size measuring device that beats, improve measuring efficiency when guaranteeing the measurement accuracy of the size that beats between the epaxial dark aperture of part and the reference shaft.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The present utility model will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a schematic view of the structure of the present utility model measured part shaft;

FIG. 2 is a schematic diagram of the structure of a jitter dimension measuring apparatus according to a preferred embodiment of the present utility model;

FIG. 3 is a schematic view of the structure of the clamping assembly of the preferred embodiment of the present utility model;

fig. 4 is a schematic structural view of a fixing bracket according to a preferred embodiment of the present utility model.

Legend description:

100. a part shaft; 101. deep small holes;

200. a clamping block; 201. a V-shaped groove; 202. a sliding groove;

300. a clamping assembly; 301. a sliding block; 302. a locking screw; 303. a buffer section;

400. a fixed bracket; 401. a support base; 402. an adjustment tank; 403. a contact screw; 404. a mounting bracket; 405. an avoidance port; 406. an adjusting block; 407. a watch stand; 408. a mounting hole; 409. and (5) a surface clamp screw.

500. A measuring lever; 501. an arc-shaped portion; 502. a contact portion; 503. a cylindrical pin;

600. a measuring meter; 601. a watch jacket;

700. and (5) a base.

Detailed Description

Embodiments of the utility model are described in detail below with reference to the attached drawing figures, but the utility model can be practiced in a number of different ways, as defined and covered below.

As shown in fig. 1 to 3, in the apparatus for measuring a runout size provided in this embodiment, the center axis of an outer cylindrical surface of a part shaft 100 is a reference axis, a deep small hole 101 coaxially arranged with the reference axis is formed on the part shaft 100, the apparatus includes a base 700, a clamping mechanism and a measuring mechanism, the clamping mechanism includes a clamping block 200 fixedly connected to the base and a clamping assembly 300 arranged on the clamping block 200, the clamping block 200 is used for placing the part shaft 100 and adhering to the outer cylindrical surface of the part shaft 100, and the clamping assembly 300 is used for radially limiting the part shaft 100 placed on the clamping block 200; the measuring mechanism comprises a fixed bracket 400 fixedly connected to the base 700 and arranged corresponding to the clamping block 200, a measuring lever 500 rotatably connected to the fixed bracket 400, and a measuring meter 600 arranged on the fixed bracket 400, wherein a first end of the measuring lever 500 is provided with an arc-shaped portion 501 for contacting with the inner wall of the deep small hole 101, a second end of the measuring lever 500 is provided with a contact portion 502 for abutting against the gauge head of the measuring meter 600, and the distance from the arc-shaped portion 501 to the rotation center of the measuring lever 500 is equal to the distance from the contact portion 502 to the rotation center of the measuring lever 500.

In this embodiment, the center axis of the outer cylindrical surface of the part shaft 100 is the reference axis H, and the measured deep small hole 101 has the following dimensions: the inner diameter of the deep small hole 101 is phi 5mm (+0.025 mm, 0), the hole depth is 40mm (+0.5 mm, 0), at this time, the jumping dimension between the inner wall of the deep small hole 101 and the reference axis H is ↗ |0.05mm|H, and since the deep small hole 101 has a certain depth, the gauge head cannot be completely penetrated into the deep small hole 101 by adopting a normal gauge 600, so that the bottommost part of the deep small hole 101 of the part axis 100 cannot be measured, the measuring lever 500 is a key of a jumping measuring device, contacts with the inner cylindrical surface of the part and the universal gauge head respectively, and rotates around the rotation center to reflect the jumping change of the cylindrical surface of the part to the universal gauge head; the lever should rotate flexibly around the center O so that one end of the arc-shaped portion 501 of the measuring lever 500 extends into the deep small hole 101, and in order to ensure that the measuring lever 500 can extend into the deep small hole 101 completely, the distance from the arc-shaped portion 501 to the rotation center of the measuring lever 500 is 55mm±0.02mm, and the distance from the contact portion 502 to the rotation center of the measuring lever 500 is 55mm±0.02mm.

In this embodiment, the clamping block 200 and the fixing bracket 400 are correspondingly fixed on the base 700, the part shaft 100 is positioned and fixed by the clamping mechanism, so that the measuring lever 500 and the deep small hole 101 are kept coaxial, the measuring lever 500 is convenient to extend into the deep small hole 101, specifically, the part shaft 100 is firstly placed on the clamping block 200, the outer cylindrical surface of the part shaft 100 is attached to the clamping block 200, the first end of the measuring lever 500 extends into the deep small hole, at this time, the arc-shaped portion 501 is abutted against the inner wall of the deep small hole 101, the second end of the measuring lever 500 is a contact portion 502 for abutting against the gauge head of the measuring gauge 600, and then the clamping assembly 300 is utilized to perform radial limiting on the part shaft 100, so that installation preparation before measurement of the runout size between the deep small hole 101 and the reference shaft on the part shaft 100 is completed, and in order to ensure measurement accuracy, the distance from the arc-shaped portion 501 to the rotation center of the measuring lever 500 is equal to the distance from the contact portion 502 to the rotation center of the measuring lever 500. In the concrete measurement, the part shaft 100 is rotated, so that the part shaft 100 is attached to the clamping block to rotate, and the measured runout size data can be obtained by observing the change of the reading of the measuring meter. To improve the accuracy of the measurement data, the accuracy of measuring the runout size data of the deep small hole 101 can be improved by adjusting the axial position of the part shaft 100 on the clamping block 200, i.e., the depth of the first end of the measuring lever 500 extending into the deep small hole 101, to measure multiple sets of data at different depths and taking an average. Through the device, under the cooperation of clamping mechanism and measuring mechanism, only need make the part axle rotate along the axial, can measure the value of beating of dark aperture 101 and reference shaft, because under clamping mechanism's effect, guaranteed the radial spacing of part axle to guaranteed the position of reference shaft unchangeable, with the stability of guaranteeing measurement accuracy, only need rotate part axle 1000 simultaneously can obtain the value of beating of dark aperture and reference shaft through the manometer, easy operation, measurement efficiency is fast. In summary, through above-mentioned size measuring device that beats, improve measuring efficiency when guaranteeing the measurement accuracy of the size that beats between the epaxial dark aperture of part and the reference shaft.

Further, the clamping block 200 is provided with a V-shaped groove for placing the part shaft 100, and the parallelism between the bottom surface of the clamping block 200 and the reference shaft is less than or equal to 0.005mm.

In this embodiment, the V-shaped groove is used to clamp the part shaft 100, and the groove walls on two sides of the V-shaped groove are abutted against the outer cylindrical surface of the part shaft 100, so that the reference shaft can be in a constant position, in order to ensure the level of the reference shaft, the parallelism between the bottom surface of the clamping block 200 and the reference shaft needs to be ensured, and is less than or equal to 0.005mm, at this time, after the part shaft 100 is clamped, the part shaft 100 can be ensured to be placed horizontally, and thus the measuring lever 500 can be smoothly extended into the deep small hole 101 after leveling. Meanwhile, the V-shaped grooves are adopted to adaptively place the part shafts 100 with different radial dimensions, so that the universality of the measured part shaft 100 is ensured, and the universality of detection is improved.

Further, sliding grooves 202 are correspondingly formed on two sides of the clamping block 200, the clamping assembly 300 comprises a sliding block 301 matched with the sliding grooves 202 and a locking screw 302 in threaded connection with the sliding block 301, the sliding block 301 is in sliding connection with the clamping block 200 through the sliding grooves 202, and the locking screw 302 penetrates through the sliding block 301 and is used for abutting against an outer cylindrical surface of the part shaft 100 so as to enable the part shaft 100 to be limited radially relative to the clamping block 200.

In this embodiment, the sliding groove 202 is opened along the length direction of the clamping block 200, the clamping assembly 300 includes a sliding block 301 and a locking screw 302 in threaded connection with the sliding block 301, and the sliding block 301 is adapted to the sliding groove 202, so that the sliding block 301 can slide along the sliding groove 202, so that the sliding block 301 can perform position adjustment along the length direction of the clamping block 200. During specific installation, the part shaft 100 is placed on the V-shaped groove, then the sliding block 301 is moved, the sliding block 301 is moved to a proper position, the locking screw 302 can be abutted with the part shaft 100, and then the fastening screw is screwed, so that the fastening screw slightly presses the part shaft 100, the part shaft 100 is radially limited, and the part shaft 100 can be axially rotated.

Further, the locking screw 302 is provided with a buffer portion 303 toward one end of the V-shaped groove for preventing scratch of the part shaft 100. In this embodiment, the buffer portion 303 may be a specific elastic rubber block, or may be a copper-welded tail portion of the locking screw 302, so that when the locking screw 302 compresses the part shaft 100, the surface of the part shaft 100 is not scratched by the tail portion of the screw, so that the part shaft 100 can be safely measured during measurement, and is not damaged.

Referring to fig. 4, the fixing support 400 includes a support base 401, a mounting support 404 and a meter frame 407, two ends of the mounting support 404 are respectively connected with the support base 401 and the meter frame 407, an avoidance opening 405 is formed on the mounting support 404, the measuring lever 500 is rotationally connected in the avoidance opening 405 through a cylindrical pin 503, and a working area for moving the second end of the measuring lever 500 is formed between the support base 401 and the meter frame 407. In this embodiment, the support base 401 is used for supporting the mounting bracket 404, the mounting bracket 404 is provided with a avoidance port 405, the measuring lever 500 is rotatably connected in the avoidance port 405 through a cylindrical pin 503, and the measuring lever 500 moves in the area of the avoidance port 405 to limit the rotation angle of the measuring lever 500.

Further, the gauge stand 407 is provided with a mounting hole 408 through which the gauge head of the measuring gauge 600 passes, the gauge stand 407 is screwed with a gauge clamp screw 409 for fixing the measuring gauge 600, and the gauge clamp screw 409 extends into the mounting hole 408 to abut against the measuring gauge 600. In this embodiment, after the gauge outfit passes through the mounting hole 408, the gauge 600 is locked by the gauge clamp screw 409 to fix the gauge 600 relative to the gauge stand 407. So that the head of the gauge 600 abuts against the contact 502.

Further, a gauge sleeve 601 is sleeved on the gauge head of the measuring gauge 600, the gauge sleeve 601 is located in the mounting hole 408, and the gauge sleeve screw 409 extends into the mounting hole 408 to abut against the gauge sleeve 601. In this embodiment, the gauge head of the measuring gauge 600 is protected by providing the gauge grip 601 to prevent the gauge grip screw 409 from scratching the gauge head of the measuring gauge 600.

Further, an adjusting block 406 is fixedly connected to the mounting bracket 404, an adjusting groove 402 for accommodating the adjusting block 406 is formed in the supporting base 401, an abutting screw 403 is connected to the supporting base 401 in a threaded manner, and the abutting screw 403 extends into the adjusting groove 402 to abut against the adjusting block 406. In this embodiment, the adjusting block 406 provided on the mounting bracket 404, the adjusting groove 402 provided on the supporting base 401, and the interference screw 403 in threaded connection on the supporting base 401 are mutually matched, so that the mounting bracket 404 can implement height adjustment relative to the supporting base 401, so as to ensure that the measuring lever 500 is adapted to different heights, thereby improving applicability in measuring the part shaft 100, specifically, when the part shaft 100 with different radial dimensions is changed, the height of the deep small hole 101 of the part shaft 100 from the ground of the clamping block 200 is correspondingly changed, and therefore, the height of the measuring lever 500 extending into the deep small hole 101 needs to be adjusted, so that the measuring lever 500 can smoothly extend into the deep small hole 101.

Further, the arc-shaped portion 501 is hemispherical, and the spherical surface of the arc-shaped portion 501 is used for abutting against the inner wall of the deep small hole 101. In this embodiment, the arc portion 501 is hemispherical, so as to ensure that the arc portion 501 makes point-to-surface contact with the inner wall of the deep hole 101, and ensure that the contact point between the arc portion 501 and the inner wall of the deep hole 101 is constant, thereby ensuring the accuracy of measurement.

Further, the gauge head of the gauge 600 abuts against the second end of the measuring lever 500, so that the gauge 600 is pressed down by 0.2-0.3 mm. In this embodiment, the gauge 600 is pressed down, so that the gauge head and the contact portion 502 can be ensured to be always contacted, and the situation that the gauge 600 is separated from the gauge is prevented. To prevent measurement errors from occurring in the meter 600, resulting in inaccurate measurement results.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A size measuring device beats for measure the size of beating of part axle (100), the center pin of the outer cylinder of part axle (100) is the reference shaft, offered on part axle (100) with the coaxial dark aperture (101) that sets up of reference shaft, its characterized in that includes:

a base;

the clamping mechanism comprises a clamping block (200) fixedly connected to the base and a clamping assembly (300) arranged on the clamping block (200), the clamping block (200) is used for placing the part shaft (100) and being attached to the outer cylinder of the part shaft (100), and the clamping assembly is used for radially limiting the part shaft (100) placed on the clamping block (200);

the measuring mechanism comprises a fixed support (400) fixedly connected to the base and corresponding to the clamping block (200), a measuring lever (500) rotatably connected to the fixed support (400) and a measuring meter (600) arranged on the fixed support (400), wherein a first end of the measuring lever (500) is provided with an arc-shaped portion (501) used for being in contact with the inner wall of the deep small hole (101), a second end of the measuring lever (500) is provided with a contact portion (502) used for being in butt joint with the gauge head of the measuring meter (600), and the distance from the arc-shaped portion (501) to the rotation center of the measuring lever (500) is equal to the distance from the contact portion (502) to the rotation center of the measuring lever (500).

2. The runout size measuring device according to claim 1, characterized in that the clamping block (200) is provided with a V-shaped groove for placing the part shaft (100), and the parallelism between the bottom surface of the clamping block (200) and the reference shaft is less than or equal to 0.005mm.

3. The runout size measuring device according to claim 2, characterized in that the two sides of the clamping block (200) are correspondingly provided with sliding grooves (202), the clamping assembly (300) comprises a sliding block (301) matched with the sliding grooves (202) and a locking screw (302) screwed on the sliding block (301), the sliding block (301) is slidably connected with the clamping block (200) through the sliding grooves (202), and the locking screw (302) penetrates through the sliding block (301) and is used for abutting with the outer cylindrical surface of the part shaft (100) so as to enable the part shaft (100) to be limited radially relative to the clamping block (200).

4. A runout size measuring device according to claim 3, characterized in that the end of the locking screw (302) facing the V-shaped groove is provided with a buffer (303) for preventing scoring of the part shaft (100).

5. The jumping dimension measuring device according to claim 1, wherein the fixing bracket (400) comprises a supporting base (401), a mounting bracket (404) and a meter frame (407), two ends of the mounting bracket (404) are respectively connected with the supporting base (401) and the meter frame (407), an avoidance opening (405) is formed in the mounting bracket (404), the measuring lever (500) is rotatably connected in the avoidance opening (405) through a cylindrical pin (503), and a working area for moving a second end of the measuring lever (500) is formed between the supporting base (401) and the meter frame (407).

6. The jumping dimension measuring device according to claim 5, wherein a mounting hole (408) through which a gauge head of the measuring gauge (600) passes is formed in the gauge stand (407), a gauge clamp screw (409) extending into the mounting hole (408) is screwed to the gauge stand (407), and the gauge clamp screw (409) is used for fixing the measuring gauge (600) to the gauge stand (407).

7. The jumping dimension measuring device according to claim 6, wherein a meter jacket (601) is sleeved on a meter head of the measuring meter (600), the meter jacket (601) is located in the mounting hole (408), and the meter jacket screw (409) extends into the mounting hole (408) to be abutted with the meter jacket (601).

8. The jumping dimension measuring device according to claim 5, wherein an adjusting block (406) is fixedly connected to the mounting bracket (404), an adjusting groove (402) for accommodating the adjusting block (406) is formed in the supporting base (401), an abutting screw (403) is connected to the supporting base (401) in a threaded manner, and the abutting screw (403) extends into the adjusting groove (402) to abut against the adjusting block (406).

9. The runout size measuring device according to claim 1, characterized in that the arc-shaped portion (501) is hemispherical, the spherical surface of the arc-shaped portion (501) being adapted to abut against the inner wall of the deep aperture (101).

10. The runout size measuring device according to claim 1, characterized in that the gauge head of the gauge (600) abuts against the second end of the measuring lever (500) so that the gauge (600) is pressed down by 0.2-0.3 mm.

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