CN216530783U - Rotor assembly and drainage pump using same - Google Patents

Abstract

The utility model relates to a rotor assembly and a drainage pump using the same, comprising: the rotor shaft, the magnetic ring injection molding body suitable for the rotor shaft to penetrate through and the clamping piece suitable for being connected with the magnetic ring injection molding body in a matching mode; wherein the end surface of the card matched with the magnetic ring injection molding body is provided with at least one connecting hole; at least one connecting column is convexly arranged on the end face of the magnetic ring injection molding body matched with the clamping piece; the end part of the connecting column far away from the magnetic ring injection molding body is integrally provided with a connecting boss; and the connecting boss is suitable for forming a buckling structure for buckling and pressing the card through deformation at one side of the card departing from the magnetic ring injection molding body after the connecting column penetrates through the connecting hole. The utility model can facilitate the assembly between the clamping piece of the rotor component and the magnetic ring injection molding body and improve the stability of the matching structure formed by the clamping piece and the magnetic ring injection molding body.

Description

Rotor assembly and drainage pump using same

Technical Field

The utility model relates to the technical field of drainage pumps, in particular to a rotor assembly and a drainage pump using the same.

Background

A water pump is not driven in washing machines and dish washers in household appliances, and a starting device of the water pump is mainly composed of a coupler, vibration reduction rubber, a starting boss, a magnetic ring injection molding assembly provided with a starting cavity, a bowl-shaped clamping piece, a sealing ring and a motor shaft.

The starting cavity is arranged on the magnetic ring injection molding assembly, a starting boss is arranged in the starting cavity, the bowl-shaped clamping piece covers the opening of the starting cavity, the coupler is arranged in the starting cavity and fixedly connected with a motor shaft, and the damping rubber is arranged in the starting cavity on two sides of a coupler starting rib; the sealing rings are sleeved on the motor shaft exposed out of the two ends of the coupler and are axially fixed in the grooves of the shaft hole of the bowl-shaped clamping piece and the grooves of the shaft hole of the starting cavity respectively; the motor shaft is driven by the starting boss in the starting cavity through the coupler to rotate.

The starting device is a closed cavity formed by a starting cavity of the magnetic ring injection molding assembly, the bowl-shaped clamping piece, the sealing ring and the motor shaft, grease is injected into the closed cavity, when the starting boss rotates to impact the damping rubber to drive the starting rib of the coupler to drive the motor shaft to rotate, the grease can effectively reduce the impact force of the starting boss impacting the damping rubber, the starting running noise of the drainage motor is reduced, and the service life of the drainage motor is prolonged.

The drainage pump commonly used in the prior art, because the closed cavity is mainly in transition fit with the annular convex rib mechanical cover of the outer wall of the magnetic ring injection molding assembly forming the starting cavity through the annular groove of the inner wall of the bowl-shaped clamping sheet, the matching force can not be effectively controlled within a stable range: the clamping piece is cracked due to overlarge matching force and difficult cover installation, and after long-time operation, the noise of the drainage motor is increased due to grease leakage in the starting cavity, the clamping piece is seriously fallen, and even the drainage motor is locked to rotate and cannot normally drain water; the matching force is too small, the sealing performance of the closed cavity is reduced, and after long-time running, grease in the cavity can leak to cause the increase of the starting running noise of the drainage motor and the increase of the starting impact force, so that the service life of the motor is reduced; meanwhile, the matching design of the grooves and the convex ribs has high requirements on the processing precision of parts and correspondingly higher manufacturing cost of the parts, and the existing injection molding process is difficult to meet the requirements on the design precision of the parts, so that the quality control cost of the whole machine is high.

In addition, in the prior art, a part of the draining pump adopts the technology that a card with a bowl-shaped structure is connected with a shell of a magnetic ring injection molding assembly in an ultrasonic wave connection mode. The wall thickness of the whole structure of the card with the bowl-shaped structure is too long, so that the card is difficult to connect when the wall thickness is longer when ultrasonic connection is carried out, and the structure has the problem of low connection reliability.

SUMMERY OF THE UTILITY MODEL

The first objective of the present invention is to provide a rotor assembly to solve the technical problem of easy assembly between a card and a magnetic ring injection molded body and improving the stability of a mating structure formed by the card and the magnetic ring injection molded body.

The second objective of the present invention is to provide a drainage pump, so as to solve the technical problem of facilitating the assembly between the clamping piece of the rotor assembly and the magnetic ring injection molding body in the drainage pump and improving the stability of the mating structure formed by the two.

The rotor assembly of the present invention is realized by:

a rotor assembly, comprising: the rotor shaft, the magnetic ring injection molding body suitable for the rotor shaft to penetrate through and the clamping piece suitable for being connected with the magnetic ring injection molding body in a matching mode; wherein

The end face of the card matched with the magnetic ring injection molding body is provided with at least one connecting hole; and

the end face of the magnetic ring injection molding body matched with the clamping piece is convexly provided with at least one connecting column;

a connecting boss is integrally arranged at the end part of the connecting column, which is far away from the magnetic ring injection molding body; and the connecting boss is suitable for forming a buckling structure for buckling the clamping piece through deformation on one side of the clamping piece, which deviates from the magnetic ring injection molding body, along with the connecting column after penetrating through the connecting hole.

In an alternative embodiment of the utility model, the connecting column and the connecting hole are suitable for forming an ultrasonic welding matching structure.

In an alternative embodiment of the utility model, the connecting column and the connecting hole are suitable for forming a rivet-turning matching structure.

In an alternative embodiment of the present invention, the connection boss has a triangular structure or a trapezoidal structure or a rectangular structure in a cross section along an axial direction parallel to the rotor shaft.

In an optional embodiment of the utility model, an accommodating groove which penetrates through the connecting hole is concavely arranged at one side end of the card, which is away from the magnetic ring injection molding body, and beside the edge of the hole of the connecting hole; and

the connecting boss is suitable for being deformed to be partially embedded into the accommodating groove.

In an alternative embodiment of the utility model, after the connecting boss is deformed and partially embedded into the accommodating groove, the end face of the buckling structure, far away from the magnetic ring injection molding body, of the clamping piece formed after the connecting boss is deformed is not higher than the end face of the clamping piece, far away from the magnetic ring injection molding body.

In an optional embodiment of the utility model, a first connecting rib suitable for being abutted against the magnetic ring injection molding body is convexly arranged on the end face, matched with the magnetic ring injection molding body, of the clamping piece; and

a second connecting rib suitable for being abutted against the clamping piece is convexly arranged on the end face, matched with the clamping piece, of the magnetic ring injection molding body; and is

The first connecting rib and the second connecting rib are respectively positioned on two sides of the connecting column along the radial direction of the rotor shaft.

In an optional embodiment of the utility model, a first connecting rib and a second connecting rib which are suitable for being abutted with the magnetic ring injection molding body are convexly arranged on the end face of the clamping piece matched with the magnetic ring injection molding body at intervals; and is

The first connecting rib and the second connecting rib are respectively positioned on two sides of the connecting hole along the radial direction of the rotor shaft.

In an optional embodiment of the utility model, a first connecting rib and a second connecting rib which are suitable for being abutted against the clamping sheet are convexly arranged on the end face of the magnetic ring injection molding body matched with the clamping sheet at intervals; and is

The first connecting rib and the second connecting rib are respectively positioned on two sides of the connecting column along the radial direction of the rotor shaft.

The draining pump of the utility model is realized by the following steps:

a drain pump, comprising: the rotor assembly.

Compared with the prior art, the embodiment of the utility model has the following beneficial effects: according to the rotor assembly and the drainage pump using the rotor assembly, the connecting hole in the card is matched with the connecting column on the magnetic ring injection molding body in an inserted manner, and then the connecting boss integrally arranged on the connecting column penetrating through the connecting hole is deformed to form a buckling and pressing structure for the card, namely, the card is firmly buckled by the connecting boss to form firm matching between the card and the magnetic ring injection molding body, so that the card is prevented from falling off from the magnetic ring injection molding body. In the assembling process of the card and the magnetic ring injection molding body, the reliable connection between the card and the magnetic ring injection molding body can be quickly and effectively formed by matching with a rivet turning or ultrasonic welding mode on the basis of insertion matching.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

Fig. 1 illustrates a schematic structural view of a rotor assembly provided in an embodiment of the present invention;

FIG. 2 illustrates a schematic structural view of a card of a rotor assembly provided by an embodiment of the present invention;

FIG. 3 shows a schematic view of the A-direction cross section of FIG. 2;

FIG. 4 illustrates a schematic view of a magnetic ring injection molded body of a rotor assembly provided by an embodiment of the present invention;

FIG. 5 shows a schematic view of the B-direction cross section of FIG. 4;

FIG. 6 is an enlarged view of section I of FIG. 5;

FIG. 7 illustrates a card and magnetic ring injection molded body matching schematic view of a rotor assembly provided by the embodiment of the utility model in an alternative implementation;

FIG. 8 shows a schematic view of the B-direction cross section of FIG. 7;

FIG. 9 is an enlarged schematic view of section III of FIG. 8;

FIG. 10 illustrates a first perspective mating view of a card and a magnetic ring injection molded body of a rotor assembly in an alternative embodiment of the present invention;

FIG. 11 illustrates a card and magnetic ring injection molded body in a second perspective mating view of a rotor assembly in an alternative embodiment of the present invention;

FIG. 12 shows a schematic view of the A-direction cross section of FIG. 10;

FIG. 13 is an enlarged view of section I of FIG. 12;

FIG. 14 shows a card and magnetic ring injection molded body mating view of a rotor assembly in yet another alternative embodiment of the present invention;

FIG. 15 is an enlarged view of section I of FIG. 14;

FIG. 16 shows a schematic view of the engagement structure for a card formed by the connection boss of FIG. 15 after deformation;

FIG. 17 is a schematic view of a partial card and magnetic ring injection molded body of a rotor assembly in yet another alternative embodiment of the utility model;

fig. 18 shows a schematic view of the engagement structure for a card formed by the connection boss of fig. 17 after deformation.

In the figure: rotor shaft 1, magnetic ring injection molding 2, spliced pole 21, connection boss 22, withhold structure 23, card 3, connecting hole 31, holding tank 32, first splice bar 4, second splice bar 5.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

Example 1:

referring to fig. 1 to 18, the present embodiment provides a rotor assembly including: the rotor comprises a rotor shaft 1, a magnetic ring injection molding body 2 suitable for the rotor shaft 1 to penetrate through, and a clamping piece 3 suitable for being connected with the magnetic ring injection molding body 2 in a matching mode; the rotor shaft 1 can simultaneously penetrate through an assembly structure formed by the clamping piece 3 and the magnetic ring injection molding body 2.

For the matching connection between the card 3 and the magnetic ring injection molding body 2, the following structure is adopted in the embodiment:

firstly, at least one connecting hole 31 is arranged on the end face of the card 3 matched with the magnetic ring injection molding body 2; at least one connecting column 21 is convexly arranged on the end face of the magnetic ring injection molding body 2 matched with the clamping piece 3; the connecting column 21 and the connecting hole 31 are in clearance fit.

The specific number of the connecting holes 31 and the connecting posts 21 in this embodiment is not limited in this embodiment. Two symmetrically arranged connecting holes 31 are formed on the card 3, and two connecting columns 21 are symmetrically arranged on the magnetic ring injection molding body 2, and the symmetrical distribution structure is adopted to improve the stability and reliability of the structure formed by the card 3 and the magnetic ring injection molding body 2 after the assembling and the connecting are completed.

As for the shapes of the connection post 21 and the connection hole 31 in the radial surface of the rotor shaft 1, considering that the connection post 21 is prevented from affecting the injection molding cavity inside the magnetic ring injection molding body 2, the connection post 21 is preferably formed on the circumferential edge of the magnetic ring injection molding body 2, that is, the connection post 21 is in an arc shape on the radial surface of the rotor shaft 1, and thus, the corresponding connection hole 31 is also in an arc shape.

Secondly, on the basis of the above structure, the connection boss 22 is further integrally arranged at the end of the connection column 21 far away from the magnetic ring injection molded body 2, when the specific assembly of the card 3 and the magnetic ring injection molded body 2 is performed, the connection column 21 and the connection column 21 penetrate through the connection hole 31 on the card 3, it should be noted here that after the insertion and connection matching of the connection column 21 and the connection hole 31 is completed, the connection boss 22 extends out of the side end of the card 3 far away from the magnetic ring injection molded body 2, so that the structure that the connection boss 22 presses the card 3 is formed through deformation processing of the connection boss 22, and the problem that the card 3 falls off from the magnetic ring injection molded body 2 under the pressing effect of the connection boss 22 on the card 3 is solved.

As for the deformation processing method of the connection boss 22, in an optional case, a rivet-turning processing method is adopted to enable the connection boss 22 to be crimped on the card 3 by rivet-turning to form a rivet-turning matching structure between the connection boss 22 and the card 3, that is, a rivet-turning matching structure is formed between the connection post 21 and the connection hole 31. In a further alternative, an ultrasonic welding processing mode is adopted, so that the connecting boss 22 is melted and then matched with the shape of the end face of the card 3, which is away from the magnetic ring injection molded body 2, to form the buckling structure 23 for the card 3, namely, an ultrasonic welding matching structure is formed between the connecting column 21 and the connecting hole 31. That is to say, as long as the connection boss 22 can be deformed by the connection boss 22 after the connection post 21 passes through the connection hole 31, the processing manner of the crimping structure 23 of the card 3 can satisfy the use requirement of the embodiment, and therefore, the specific processing manner is not absolutely limited in this embodiment.

On the basis of the above structure, it should be further explained that the cross section of the specific connection boss 22 along the axial direction parallel to the rotor shaft 1 may be a triangular structure, a trapezoidal structure, or a rectangular structure, or may be a special-shaped structure, and this embodiment is not limited in any way.

In addition, considering that the connection boss 22 is to buckle the card 3 through deformation at a portion extending out of the connection hole 31 after the connection post 21 penetrates through the connection hole 31, if the end surface of the card 3 departing from the magnetic ring injection molded body 2 is a flat end surface, the buckling structure 23 formed by buckling the card 3 after the connection boss 22 is deformed is a convex structure relative to the end surface of the card 3 departing from the magnetic ring injection molded body 2, and the structure does not affect the specific use of the rotor assembly, but under the long-term use condition, the buckling structure 23 is convex, so that the situation of being worn is avoided. Therefore, based on the situation, the design is made in the embodiment, namely, an accommodating groove 32 penetrating through the connecting hole 31 is concavely arranged at one side end of the card 3, which is far away from the magnetic ring injection molded body 2, and beside the hole edge of the connecting hole 31; and the coupling boss 22 is adapted to be deformed to be partially inserted into the receiving groove 32. That is to say, the holding groove 32 is because the side end face that deviates from magnetic ring injection molding 2 for card 3 is sunken form, under such structure, the holding groove 32 also provides the space of stepping down in the connection boss 22 deformation process for the connection boss 22 after the deformation can partly enter into the holding groove 32 and make the knot that forms to card 3 press the structure 23 and deviate from the side end face of magnetic ring injection molding 2 for card 3 and no longer be protruding form, so as to reduce in the use to it because of the friction produces the wearing phenomenon.

So, combine the structure of above-mentioned holding tank 32, after connecting boss 22 deformation and partly embedding to holding tank 32, should connect boss 22 deformation back to the card 3 formation detain the terminal surface that presses structure 23 to keep away from magnetic ring injection molding 2 not higher than the terminal surface that the card 3 deviates from magnetic ring injection molding 2, under an optional condition, connect boss 22 deformation back to the card 3 formation detain the terminal surface that presses structure 23 to keep away from magnetic ring injection molding 2 and the terminal surface that the card 3 deviates from magnetic ring injection molding 2 flush, make the card 3 deviate from the terminal surface of magnetic ring injection molding 2 wholly for plain end face structure.

In summary, for the rotor assembly of the present embodiment, the connection hole 31 on the card 3 is first matched with the connection post 21 on the magnetic ring injection molded body 2 in an inserting manner, and then the connection boss 22 integrally disposed on the connection post 21 penetrating through the connection hole 31 is deformed to form the fastening structure 23 for the card 3, that is, the connection boss 22 firmly fastens the card 3 to form a firm connection between the card 3 and the magnetic ring injection molded body 2, so as to prevent the card 3 from falling off from the magnetic ring injection molded body 2. In the assembling process of the card 3 and the magnetic ring injection molding body 2, the reliable matching between the card 3 and the magnetic ring injection molding body 2 can be quickly and effectively formed by matching with a rivet turning or ultrasonic welding mode on the basis of insertion matching

Example 2:

referring to fig. 1 to 18, on the basis of the rotor assembly of embodiment 1, in view of further improving the firmness of the coupled state of the card 3 and the magnetic ring injection molded body 2 and the sealing performance of the receiving space of the rotor shaft 1 formed by the two in a matching manner, the present embodiment is further improved in the following structure.

The first improvement is that: a first connecting rib 4 which is suitable for being abutted against the magnetic ring injection molding body 2 is convexly arranged on the end surface of the card 3 matched with the magnetic ring injection molding body 2; a second connecting rib 5 suitable for being abutted against the card 3 is convexly arranged on the end face of the magnetic ring injection molded body 2 matched with the card 3; the first connecting rib 4 and the second connecting rib 5 which are optional here are both of a closed annular structure, and in a state that the clamping piece 3 is connected with the magnetic ring injection molded body 2 in a matched mode, the first connecting rib 4 and the second connecting rib 5 are respectively located on two sides of the connecting column 21 in the radial direction of the rotor shaft 1.

The second improvement is as follows: the end face of the card 3 matched with the magnetic ring injection molding body 2 is convexly provided with a first connecting rib 4 and a second connecting rib 5 at intervals, wherein the first connecting rib and the second connecting rib are suitable for being abutted against the magnetic ring injection molding body 2; the first connecting rib 4 and the second connecting rib 5 which are optional here are both of a closed annular structure, and in a state that the clamping piece 3 is connected with the magnetic ring injection molded body 2 in a matched mode, the first connecting rib 4 and the second connecting rib 5 are respectively located on two sides of the connecting column 21 in the radial direction of the rotor shaft 1.

The third improvement is that: a first connecting rib 4 and a second connecting rib 5 which are suitable for being abutted against the card 3 are convexly arranged on the end face of the magnetic ring injection molding body 2 matched with the card 3 at intervals; the first connecting rib 4 and the second connecting rib 5 which are optional here are both of a closed annular structure, and in a state that the clamping piece 3 is connected with the magnetic ring injection molded body 2 in a matched mode, the first connecting rib 4 and the second connecting rib 5 are respectively located on two sides of the connecting column 21 in the radial direction of the rotor shaft 1.

To sum up, for the first connecting rib 4 and the second connecting rib 5 under the above three conditions, the stability and reliability of the connecting structure formed between the card 3 and the magnetic ring injection molded body 2 are further effectively ensured by matching with the connecting structure formed by the connecting post 21 and the connecting hole 31. The specific shapes of the first connecting rib 4 and the second connecting rib 5 are not absolutely limited in this embodiment; the first connecting beads 4 may be the same shape as the second connecting beads 5, or may be different shapes.

Example 3:

on the basis of the rotor assembly of embodiment 1 or embodiment 2, the present embodiment provides a drain pump including: the rotor assembly of embodiment 1 or embodiment 2.

The above embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present invention, unless otherwise expressly stated or limited, the first feature may be present on or under the second feature in direct contact with the first and second feature, or may be present in the first and second feature not in direct contact but in contact with another feature between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Claims (10)

1. A rotor assembly, comprising: the rotor shaft, the magnetic ring injection molding body suitable for the rotor shaft to penetrate through and the clamping piece suitable for being connected with the magnetic ring injection molding body in a matching mode; wherein

The end face of the card matched with the magnetic ring injection molding body is provided with at least one connecting hole; and

the end face of the magnetic ring injection molding body matched with the clamping piece is convexly provided with at least one connecting column;

a connecting boss is integrally arranged at the end part of the connecting column, which is far away from the magnetic ring injection molding body; and the connecting boss is suitable for forming a buckling structure for buckling the clamping piece through deformation on one side of the clamping piece, which deviates from the magnetic ring injection molding body, along with the connecting column after penetrating through the connecting hole.

2. The rotor assembly of claim 1 wherein the connecting post and the connecting bore are adapted to form an ultrasonic weld fit therebetween.

3. The rotor assembly of claim 1 wherein the connecting post and the connecting hole are adapted to form a clinch engagement therebetween.

4. The rotor assembly of claim 1 wherein the connection boss has a triangular structure or a trapezoidal structure or a rectangular structure in a cross section parallel to an axial direction of the rotor shaft.

5. The rotor assembly as claimed in any one of claims 1 to 4, wherein a receiving groove penetrating the connection hole is concavely formed at one side end of the clamping piece facing away from the magnetic ring injection molding body and beside the edge of the hole of the connection hole; and

the connection boss is adapted to be deformed to be partially inserted into the receiving groove.

6. The rotor assembly as claimed in claim 5 wherein the connection boss is deformed to partially fit into the receiving groove such that the end surface of the engagement structure formed on the card after the deformation is not higher than the end surface of the card facing away from the magnetic ring injection molded body.

7. The rotor assembly as claimed in claim 1, wherein a first connecting rib adapted to abut against the magnetic ring injection molded body is protruded on an end surface of the clamping piece, which is engaged with the magnetic ring injection molded body; and

a second connecting rib suitable for being abutted against the clamping piece is convexly arranged on the end face, matched with the clamping piece, of the magnetic ring injection molding body; and is

The first connecting rib and the second connecting rib are respectively positioned on two sides of the connecting column along the radial direction of the rotor shaft.

8. The rotor assembly as claimed in claim 1, wherein the end surface of the clamping piece, which is matched with the magnetic ring injection molding body, is provided with a first connecting rib and a second connecting rib which are protruded at intervals and are suitable for being abutted with the magnetic ring injection molding body; and is

The first connecting rib and the second connecting rib are respectively positioned on two sides of the connecting hole along the radial direction of the rotor shaft.

9. The rotor assembly as claimed in claim 1, wherein the end surface of the magnetic ring injection molded body engaged with the card is provided with a first connecting rib and a second connecting rib at intervals and protruding, and the first connecting rib and the second connecting rib are suitable for being abutted against the card; and is

The first connecting rib and the second connecting rib are respectively positioned on two sides of the connecting column along the radial direction of the rotor shaft.

10. A drain pump, comprising: a rotor assembly as claimed in any one of claims 1 to 9.

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