JP5202121B2 - Cylindrical bracket for cylindrical vibration isolator - Google Patents

Description

  The present invention relates to a cylindrical metal fitting used for a cylindrical vibration isolator such as an engine mount.

As this type of cylindrical metal fitting, it is known that a plate material is deep-drawn and formed by press molding so as to have a shape in which flanges are integrally formed at both ends of a cylindrical portion. In addition, there is a special deep drawing press molding of a cylindrical metal fitting for a vibration isolator having a flange only at one end side (see Patent Document 1).
JP 2005-315318 A

When deep drawing press molding into a shape having flanges at both ends of the cylindrical portion, there is a limit to the size of the flange that can be formed by general deep drawing, and the mounting leg cannot be welded using the flange. In addition, since the cylindrical portion becomes thin, the plate thickness before molding must be increased so as not to cause insufficient rigidity. However, if it does in this way, it will increase in thickness to an unnecessary part, and will cause the whole weight increase and cost increase.
Further, the method according to Patent Document 1 is not suitable for mass production because it takes a lot of time and is expensive even if a relatively large flange can be formed. Moreover, it can be formed only on one end side.
Accordingly, the present invention has a cylindrical shape that has flanges large enough to weld the mounting bracket at both ends, can partially increase the rigidity of the cylindrical portion, and does not require a special deep drawing, and is inexpensive and mass-productive. The purpose is to provide metal fittings.

In order to solve the above-mentioned problems, the invention according to claim 1 relating to a cylindrical metal fitting for a cylindrical vibration isolator is a cylindrical metal fitting used for a cylindrical vibration isolator, and includes a cylindrical portion and openings at both axial ends thereof. In the cylindrical metal fitting for a cylindrical vibration isolator having a main body part integrally provided with the provided flange and a mounting leg welded to the main body part,
Dividing the cylindrical portion in the axial direction into a first divided body and a second divided body;
Each of the first and second divided bodies includes a divided cylindrical portion and a flange integrally formed at one end in the axial direction thereof.
Each divided tube portion has a lapping allowance overlapping in the axial direction,
Both laps are overlapped in the axial direction, and both divided cylinder parts are fitted inside and outside and integrated with each other.

Further, the first divided member and the second split body is being different from the thickness is relatively large and small.

Further , the cylindrical vibration isolator is arranged with the axial direction directed in the front-rear direction of the vehicle, the thinner divided body is arranged in the deceleration-side input direction, and the other thicker divided cylinder is arranged. The portion is arranged in the acceleration side input direction.

Invention Oite to the claim 1 of claim 2, wherein the first divided member and the second split body is formed by integrally flange and the split tube portion to respectively stop the single plate material processing It is characterized by being.

According to a third aspect of the present invention, in the first aspect, the mounting leg is welded to the main body portion across the overlapping portions of the divided cylindrical portions of the first divided body and the second divided body. And

According to a fourth aspect of the present invention, in the first aspect, the mounting leg includes a first mounting leg extending in the axial direction, and the first mounting leg includes a vertical wall and a horizontal wall, while the flange has an edge. By providing a vertical edge and a horizontal edge by straightening the part, overlapping the vertical edge to the vertical wall, overlapping the horizontal edge to the horizontal wall, and welding these overlapping parts, The mounting leg and the flange are integrated.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the mounting leg is attached to the first mounting leg extending in the axial direction and the outer peripheral portion of the cylindrical portion and extends in the radial direction. It is characterized by being provided with a second mounting leg and separately formed, and together with the first divided body and the second divided body, these four members are integrally assembled by welding.

In a sixth aspect of the present invention, in any one of the first to fifth aspects, the mounting leg is attached to the first mounting leg extending in the axial direction and the outer peripheral portion of the cylindrical portion and extends in the radial direction. And a second mounting leg, wherein the first and second mounting legs are integrally formed from a single plate material by press molding.

  According to the first aspect, since the first divided body and the second divided body are divided in the axial direction of the cylindrical portion, and the overlapping wrap allowance is provided in each divided cylindrical portion in the axial direction, If they are overlapped and integrated, a cylindrical metal fitting in which the first divided body and the second divided body are integrated can be formed. In addition, since each divided tube portion is divided in the axial direction of the tube portion, the amount of drawing is reduced, and a relatively large flange can be integrally formed by pressing without requiring a special deep drawing technique. Further, by joining and integrating the first and second divided bodies, a relatively large flange is provided at both axial ends of the cylindrical portion. Further, the cylinder portion rigidity can be partially increased by the coupling at the lap allowance, and it is not necessary to increase the thickness of the other portions, so that the overall weight can be reduced compared to the height of the cylinder portion rigidity. Moreover, it is rich in mass productivity and can reduce costs.

Furthermore , since the first divided body and the second divided body are separated from each other, the thickness of each can be varied, and the rigidity can be partially changed as necessary.

In addition , the thin divided cylinder part is arranged on the rear side, which is the input side during deceleration, and the thick divided cylinder part is arranged on the front side, which is the input side during acceleration. Focusing on the change in required rigidity, the input side during acceleration, which requires higher rigidity, is made sufficiently high, and the input side during deceleration, which requires relatively low rigidity, is thinned to reduce the overall weight. Can be planned.

According to claim 2, since the first split body and the second split body is a single plate material respectively to form a by press-forming a flange and the split tubular portion integrally becomes easy to manufacture at low cost.

According to the third aspect , since the mounting legs are welded so as to straddle the lap portions of the first divided body and the second divided body, the coupling rigidity of the wrap portions can be increased by the mounting legs.

According to the fourth aspect , since the flange can be formed relatively large, the vertical edge and the horizontal edge can be formed. Therefore, a first mounting leg extending in the axial direction of the cylindrical portion is provided, a vertical wall and a horizontal wall are provided on the first mounting leg, and a vertical edge provided on the vertical wall and the flange is overlapped. By superimposing the horizontal wall and the horizontal edge of the flange and welding each other, the first mounting leg can be integrated by welding using the flange.

According to claim 5 , by providing a second mounting leg portion that is attached along the outer periphery of the cylindrical portion separately from the first mounting leg portion, and welding and integrating four independent separate members, A cylindrical fitting having the first mounting leg and the second mounting leg can be easily formed.

According to the sixth aspect , the first mounting leg portion and the second mounting leg portion are integrally formed by press molding from the plate material, so that a total of three separate members can be integrated by welding to form a cylindrical metal fitting. Therefore, the number of parts can be reduced.

  An embodiment will be described below with reference to the drawings. 1 is a perspective view of a cylindrical metal fitting 1 according to the present embodiment, FIG. 2 is a front view of the cylindrical metal fitting 1, FIG. 3 is a side view, FIG. 4 is a plan view, and FIG. 6 is a sectional view taken along line 6-6 in FIG. 3, FIG. 7 is a sectional view taken along line 7-7 in FIG. 4, and FIG. 8 is an exploded perspective view of components.

The tubular metal fitting 1 is integrally formed with flanges 3 folded back from the periphery of the opening 4 on both axial sides of the tubular portion 2.
A first mounting leg 5 is attached to the flange 3 and the tube portion 2 by welding so as to project from side to side along the axial direction L of the tube portion 2. Further, a second mounting leg portion 6 protruding in the radial direction of the cylindrical portion 2 is attached to the outer peripheral portion of the cylindrical portion 2 by welding. The first mounting leg 5 and the second mounting leg 6 are provided with mounting holes 5a and 6a, respectively, and are attached to a vehicle body (not shown) by bolts 7 (FIG. 7).

  A known anti-vibration rubber 8 is accommodated inside the cylindrical portion 2 (FIG. 2), and a shaft 9 (FIG. 2) integrated in the center of the anti-vibration rubber 8 is along the axial direction L of the cylindrical portion 2. It extends from the opening 4 and is attached to an engine (not shown). Further, the axial direction L is arranged in the front-rear direction (FIG. 7). As a result, the vibration of the engine is absorbed by the vibration isolating rubber 8 to block transmission to the vehicle body side, and the engine load during acceleration and deceleration input from the axial direction L is absorbed.

  Hereinafter, description will be made with reference to FIG. The main body portion in which the cylindrical portion 2 and the left and right flanges 3 are integrated is composed of a first divided body 10 and a second divided body 20 that are divided in the axial direction L of the cylindrical portion 2 and is further separated. Are assembled by welding the first mounting leg 5 and the second mounting leg 6 formed in the above, and are composed of four independent separate parts as a whole. Each is manufactured by press forming a steel plate.

  The 1st division body 10 and the 2nd division body 20 are provided with the division cylinder parts 11 and 21 fitted inside and outside mutually, and the flange 3 integrated in each axial direction one end side, and in a present Example. The divided cylinder part 21 that overlaps the outside has a large diameter, and the divided cylinder part 11 that overlaps the inside has a small diameter.

The fitting of the divided cylinder part 11 and the divided cylinder part 21 may be a loose fit that can be fitted in and out without requiring press-fitting or little force. In the case of press fitting, the first divided body 10 and the second divided body 20 can be combined and integrated only by press fitting.
Moreover, when fitting loosely, it integrates by welding a fitting part perimeter. In either case, it has lap margins 12 and 22 overlapping inside and outside.

The flange 3 of both the first divided body 10 and the second divided body 20 has substantially the same shape, and integrally includes projecting portions 30 and 31 that partially project in the radial direction. In the conventional general deep drawing press molding, only the size of the portion excluding the overhanging portions 30 and 31 can be integrally formed. These overhanging portions 30 and 31 are formed in the conventional general deep drawing press forming. It is so big that it is difficult.
In the present embodiment, since the first divided body 10 and the second divided body 20 are divided and formed, it is only necessary to form a divided cylindrical portion shorter than the conventional cylindrical portion and a flange on one side. It can be formed with a margin by general deep drawing press forming without special deep drawing.

  Further, the protruding portion 31 is bent at approximately 90 ° at the tip to form a horizontal edge 32 having a substantially horizontal tip, which can be welded to the first mounting leg 5 side. In addition, a vertical edge portion 33 that is linearly cut in the vertical direction is formed on a part of the flange 3, so that it can be welded to the first mounting leg portion 5 again.

  The first mounting leg 5 includes horizontal walls 40 substantially parallel to the axial direction L of the cylindrical portion 2 on the left and right sides, and an intermediate portion of the left and right horizontal walls 40 is formed on a stepped portion 41 that enters between the left and right flanges 3. It has become. A horizontal edge 32 overlaps the horizontal wall 40 outside the stepped portion 41 and is welded to the horizontal edge 32 (see FIGS. 1, 4 and 7).

Further, a vertical wall 42 that bends at right angles to the horizontal wall 40 is provided, and the vertical edge 33 of the flange 3 abuts on a vertical flat surface of the vertical wall 42, so that welding can be performed at this abutting portion (FIGS. 1, 2, and 4). 6).
Thus, the first mounting leg 5 is provided with the horizontal wall 40 and the vertical wall 42, while the flange 3 is provided with the horizontal edge 32 and the vertical edge 33. And the flange 3 can be welded.

  In addition, the first mounting leg 5 is integrally formed with an oblique protrusion 43 so as to face the vertical wall 42 with the stepped portion 41 interposed therebetween. It is welded with the outer periphery of the cylinder part 2 by a part (refer FIG. 6).

  In the state where these components are assembled and integrated, as shown in FIG. 1, the distal end 23 of the outer divided tubular portion 21 protrudes from the surface of the tubular portion 2, but the protruding portion 43 straddles the distal end 23. Then, it overlaps with both the division | segmentation cylinder parts 11 and the lap | wrap allowances 22 other than the lap | wrap allowance 12, and is welded with respect to the wrap allowance 22. In addition, since it is continuous with the left and right horizontal walls 40 and is integrated with the first mounting leg 5, the connection rigidity between the divided cylindrical portions 11 and 21 can be increased by reinforcing the protrusion 43 (FIGS. 3 and 4). , 7).

  The horizontal wall 40 is formed as a single piece that is continuous to the left and right of the cylindrical portion 2 with the stepped portion 41 interposed therebetween, and a mounting hole 5a is formed outside the joint portion with the horizontal edge portion 32 of the horizontal wall 40. (See FIGS. 5 and 7).

  The wrap margins 12 and 22 have the same width, and the divided cylinder portions 11 and 21 include a portion that overlaps with a lap width d (FIG. 7) at the lap margins 12 and 22 and a portion that does not wrap, and the divided cylinder portion 21. The front end 23 of the split cylinder part 11 is positioned on the upper side (outer side), and the front end 13 of the split cylinder part 11 is positioned on the lower side (inner side), and is welded along the front end 23 of the split cylinder part 21 (see FIGS. 3, 4, and 7).

As shown in FIGS. 1 and 4, the second mounting leg portion 6 includes left and right walls 50 a and 50 b having a width that enters between the left and right flanges 3, and the flat portion 51 therebetween is the axial width of the cylindrical portion 2. The curvature is slightly narrower and is formed on the proximal end side of the bent portion 52 on the proximal end side and each of the left and right walls 50a and 50b (the second mounting leg 6 is expressed as the left and right walls). The portion 53 (see FIG. 8) is in contact with the outer periphery of the cylindrical portion 2 and is welded.
Note that the bending portions 53 of the left and right walls 50a and 50b have different degrees of bending according to the difference in diameter between the first divided body 10 and the second divided body 20 that are in contact with each other.

  At this time, the bent portion 52 is welded to the lapping margin 22 across the tip 23 (FIGS. 4, 5, and 6), and one of the left and right walls 50a is connected to the divided tube portion 11, and the other left and right walls 50b are connected to the divided tube portion 21. As a result, the joint rigidity of the first divided body 10 and the second divided body 20 is also increased. (See FIGS. 1, 4 and 6).

Next, the manufacturing method of this cylindrical metal fitting 1 is demonstrated. First, the first mounting leg 5, the second mounting leg 6, the first divided body 10, and the second divided body 20 are separately press-molded from plate materials. At this time, since the first divided body 10 and the second divided body 20 correspond to those obtained by dividing the cylinder portion by two with respect to the conventional one having flanges on both sides, the divided cylinder portions 11 and 21 are provided. It can be easily formed by ordinary deep drawing in a state where the flange 3 is integrated with one axial end of each.
In addition, the second divided body 20 having a large diameter of the divided cylinder portion 21 uses a member having a plate thickness larger than that of the first divided body 10.

  Next, the first divided body 10 and the second divided body 20 are assembled. At this time, the lap margins 12 and 22 of the divided cylinder portion 11 and the divided cylinder portion 21 are press-fitted so as to overlap inside and outside so that the small diameter divided body 10 is inside and the large diameter divided body 20 is outside. As a result, the divided cylinder portions 11 and 21 are integrated, so that depending on the required degree of coupling rigidity, the integration of the first divided body 10 and the second divided body 20 is completed in this state, and the cylindrical portion 2.

  However, in this embodiment, the entire circumference is welded along the tip 23 to further increase the bonding strength. In this way, the first mounting leg 5 and the second mounting leg 6 are attached to the cylindrical part 2 in which the divided cylindrical parts 11 and 21 are integrated.

  First, the first mounting leg 5 puts the step 41 between the left and right flanges 3, and the horizontal edge 32 is overlapped on the horizontal wall 40 and welded along the horizontal edge 32. Further, the vertical edge portion 33 is brought into contact with the vertical wall 42 and welded along the contact portion.

  Further, the protruding portion 43 is overlapped on the outer peripheral surface of the cylindrical portion 2, straddling the tip 23, and welded to the lapping margin 22 along the edge of the protruding portion 43. As a result, the first mounting leg 5 is welded to the cylindrical portion 2 with high strength, and the coupling rigidity between the divided cylindrical portions 11 and 21 is increased.

  Subsequently, the second mounting leg 6 is attached. The base side of the second mounting leg portion 6 is inserted between the left and right flanges 3, the bent portion 52 and the curved portion 53 are each along the outer periphery of the cylindrical portion 2, and are welded along the respective contact portions. At this time, since the bent portion 52 is welded to the lapping margin 22 across the tip 23, the coupling strength of the second mounting leg portion 6 is also increased, and the coupling rigidity of the divided cylindrical portions 11 and 21 is increased.

  As described above, the welded portion A between the divided cylindrical portions 11 and 21, the welded portion B between the horizontal edge portion 32 and the horizontal wall 40, the welded portion C between the vertical edge portion 33 and the vertical wall 42, and the protruding portion 43 The welded portion D, the bent portion 52, and the curved portion 53 with respect to the lap allowance 22 and the welded portion E with respect to the lap allowance 22 and the divided tube portion 11 are firmly integrated by welding at a total of five locations (FIG. 1). ).

  Next, the usage method will be described. As shown in FIG. 2, a vibration isolating rubber 8 is integrated inside the cylindrical portion 2 to constitute a cylindrical vibration isolating device, and the first mounting leg 5 is placed on the vehicle body side frame, and the axial direction Adjust L in the front-rear direction. At this time, as shown in FIG. 7, the second divided body 20 having a large thickness and high rigidity is arranged on the rear side, the first divided body 10 faces the front side, and the first mounting leg 5 Is fixed to the vehicle body side through the cylindrical metal fitting 1 at the mounting hole 5a. Further, the shaft 9 is attached to the engine side.

In this way, the vibration of the engine is transmitted from the shaft 9 to the anti-vibration rubber 8 and absorbed by the anti-vibration rubber 8, so that vibration transmission to the vehicle body can be blocked.
Further, during traveling, during sudden acceleration, the engine load is applied from the shaft 9 to the first divided body 10 via the vibration isolating rubber 8. However, since the split cylinder part 11 and the split cylinder part 21 are integrated by overlapping the lap allowances 12 and 22 and have high rigidity, they can sufficiently withstand a large load during sudden acceleration.

Moreover, the first and second mounting legs 5 and 6 are welded across the wrap margins 12 and 22 to increase the coupling rigidity.
Furthermore, at the time of sudden deceleration, the engine rapidly moves relatively forward, so that a larger load is applied to the second divided body 20 side. However, since the second divided body 20 is thicker and more rigid than the first divided body 10, it can sufficiently withstand such a larger load.

  In addition, the thickness is increased only on the second divided body 20 side where higher rigidity is required in such a situation, and it is not necessary to increase the thickness of the entire cylindrical portion 2, so that the actual thickness changes. It is possible to reduce the weight and the cost as a whole. In addition, the cylindrical portion 2 is overlapped by the lapping margins 12 and 22 of the divided cylindrical portions 11 and 21 and is partially rigid as a whole of the vibration isolator 1.

  In this embodiment, the cylindrical portion 2 is replaced with the first divided body 10 and the second divided portion as compared with the conventional example including the cylindrical portion 2, the first mounting leg portion 5, and the second mounting leg portion 6. It is composed of four parts divided into divided bodies 20. For this reason, manufacture becomes easy, the rigidity of the cylinder part 2 can be increased, and the rigidity distribution can be changed according to the actual situation, but the number of components increases by one point.

FIG. 9 shows another embodiment in which the same three parts as in the prior art can be configured. FIG. 9 is an exploded perspective view of components as in FIG.
The cylindrical metal fitting 1 in this embodiment is the same as the previous embodiment in that the main body portion including the cylinder portion and the flange is divided into the first divided body 10 and the second divided body 20. The first mounting leg 5 and the second mounting leg 6 are integrated with a single component composite mounting leg 60.

  In addition, a common code | symbol is used for a common part with the previous Example. Further, since the composite mounting leg 60 is also an integration of the first mounting leg 5 and the second mounting leg 6, the first mounting leg 5 and the second mounting leg are configured for each component. The common reference numerals of the mounting legs 6 are used.

  In this example, the composite mounting leg 60 has the first portion by the continuous portion 61 that continuously integrates the vertical wall 42 of the first mounting leg 5 and the bent portion 52 of the second mounting leg 6. A first mounting leg 62 corresponding to the mounting leg 5 and a second mounting leg 63 corresponding to the second mounting leg 6 are continuously integrated.

  The first mounting leg 62 and the second mounting leg 63 retain the structures of the first mounting leg 5 and the second mounting leg 6, respectively. Therefore, the welding assembly method of the first mounting leg 62 and the second mounting leg 63 and the tube part 2 is the case where the first mounting leg 5 and the second mounting leg 6 are welded. The same.

  In order to form the composite mounting leg 60, the unfolded shapes of the first mounting leg 5 and the second mounting leg 6 are continuously integrated by a continuous portion 61 from a single plate material. If it cuts and this is press-molded and each part of the 1st attachment leg part 62 and the 2nd attachment leg part 63 is bend | folded etc., the composite attachment leg part 60 can be obtained.

  If it does in this way, the number of parts which constitutes cylindrical metal fitting 1 will be three parts of the 1st division object 10, the 2nd division object 20, and compound attachment leg part 60, and will become the same number of parts as before. The same is true for the number of parts, which is more advantageous in manufacturing.

  The present invention is not limited to the above-described embodiments, and various modifications and applications can be made within the principle of the invention. For example, the divided cylinder part 11 and the divided cylinder part 21 can be integrated by press-fitting without welding, and at this time, the first mounting leg part 5 and the second mounting leg part 6 are overlapped parts. If the welding is carried out straddling, the joint rigidity only by press-fitting can be made sufficiently high by using the first mounting leg 5 and the second mounting leg 6.

Further, the first divided body 10 and the second divided body 20 may be combined not only with thickness but also with different materials and strengths. If it does in this way, it can be made to adapt according to the further required rigidity and intensity.

The perspective view of the cylindrical metal fitting which concerns on a present Example Front view of cylindrical bracket Side view of cylindrical bracket Top view of cylindrical fitting The figure which shows the bottom side from the slanting lower part of a cylindrical metal fitting 6-6 sectional view of FIG. Sectional view along line 7-7 in FIG. Exploded perspective view of components The perspective view which decomposed | disassembled the component like FIG. 8 which concerns on another Example.

Explanation of symbols

1: cylindrical fitting, 2: cylindrical portion, 3: flange, 4: opening, 5: first mounting leg, 6: second mounting leg, 10: first divided body, 11: divided Tube portion, 12: Lapping allowance, 13: Tip, 20: Second divided body, 21: Divided tube portion, 22: Lapping allowance, 23: Tip, 32: Horizontal edge, 33: Vertical edge, 40: Horizontal Wall, 42: vertical wall

Claims (6)

A cylindrical metal fitting (1) used for a cylindrical vibration isolator, and a main body portion integrally provided with a cylindrical portion (2) and flanges (3) provided at openings at both axial ends thereof, and the main body In the cylindrical metal fitting for a cylindrical vibration isolator provided with a mounting leg welded to the part,
The cylindrical portion is divided in the axial direction into a first divided body (10) and a second divided body (20),
Each of the first and second divided bodies includes a divided cylindrical portion (11, 21) and a flange (3) integrally formed on one axial end side thereof,
Each divided tube portion has a lapping margin (12, 22) overlapping in the axial direction,
Both lap allowances are overlapped in the axial direction, both split cylinder parts are fitted inside and outside, and integrated with each other,
The first divided body (10) and the second divided body (20) are relatively different in thickness.
The cylindrical vibration isolator is arranged with the axial direction facing the front-rear direction of the vehicle,
The thinner divided body is arranged in the deceleration side input direction,
A cylindrical bracket for a cylindrical vibration isolator, wherein the other divided cylindrical portion is disposed in the acceleration side input direction. Each of the first divided body (10) and the second divided body (20) is formed by drawing a single plate material and integrally forming a flange and a divided cylindrical portion. A cylindrical metal fitting for a cylindrical vibration isolator according to claim 1 . The said attachment leg is welded to a main-body part across the overlapped part in each division | segmentation cylinder part of said 1st division body (10) and 2nd division body (20), It is characterized by the above-mentioned. The cylindrical bracket for the cylindrical vibration isolator described. The mounting leg comprises a first mounting leg (5) extending in the axial direction, the first mounting leg comprising a vertical wall (42) and a horizontal wall (40), while the flange (3) has an edge. A vertical edge (33) and a horizontal edge (32) are provided by straightening the part, the vertical edge is overlapped on the vertical wall, the horizontal edge is overlapped on the horizontal wall, and these overlapping parts are welded. Thus, the first mounting leg (5) and the flange (3) are integrated with each other. The mounting leg includes a first mounting leg (5) extending in the axial direction and a second mounting leg (6) mounted on the outer peripheral portion of the cylindrical portion and extending in the radial direction. The cylindrical anti-bore according to any one of claims 1 to 4, wherein the total four members are assembled together by welding together with the first divided body and the second divided body. Cylindrical bracket for vibration device. The mounting leg includes a first mounting leg (5) extending in the axial direction and a second mounting leg (6) mounted on the outer peripheral portion of the cylindrical portion and extending in the radial direction. The cylindrical bracket for a cylindrical vibration isolator according to any one of claims 1 to 5, wherein the first and second mounting legs are integrally formed from a single plate material by press molding.

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