CN218570060U - High-power direct-current flat motor and marine cabin door opening and closing mechanism - Google Patents

Abstract

The utility model relates to a technical field of motor, in particular to high-power direct current flat motor and marine hatch door mechanism that opens and shuts. The motor comprises a shell and a rotating shaft which is rotatably connected with the shell; the rotor comprises a rotating shaft, a first stator unit, a second stator unit, a first rotor unit, a second rotor unit, a first stator unit and a second stator unit, wherein the rotating shaft is sleeved with the first rotor unit and the second rotor unit; the first stator unit and the second stator unit are fixedly connected with the shell, the first stator unit is contacted with the first rotor unit through a first brush assembly, and the second stator unit is contacted with the second rotor unit through a second brush assembly; the first brush assembly is electrically connected with the second brush assembly. Through the design of the two sets of stator units, the two sets of rotor units and the two sets of brush assemblies, the motor can bear high-power output in a short time, and meanwhile, through reasonable layout of the structure, the motor is compact in structure, small in occupied space and applicable to various installation occasions.

Description

High-power direct-current flat motor and marine cabin door opening and closing mechanism

Technical Field

The utility model relates to a technical field of motor, in particular to high-power direct current flat motor and marine hatch door mechanism that opens and shuts.

Background

At present, along with the development of industry, motors aiming at various requirements are produced. However, some of the existing various devices requiring motors do not actually require high power, but need to provide high power for a short time in a certain state. In this case, only the ac high-power motor is usually selected as the power source, however, this results in waste of the working capacity and energy of the ac high-power motor. For example, in the shipbuilding industry, the ac high-power motor is generally used as a power source for controlling opening and closing of a cabin door of a ship, but in the actual situation, the actual normal working power of the motor is not high, and only a short-time high power needs to be provided by closing the tail end, which causes waste of the working capacity and energy of the ac high-power motor.

Therefore, how to design a direct current motor which can bear short-time high-power use and can also achieve compact structure of the motor becomes a great problem to be solved urgently in the field.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the direct current motor in the prior art cannot bear the capacity of short-time high power, the utility model provides a high-power direct current flat motor, which comprises a casing and a rotating shaft which is rotatably connected with the casing; the rotor comprises a rotating shaft, a first stator unit, a second stator unit, a first rotor unit, a second rotor unit, a first stator unit and a second stator unit, wherein the rotating shaft is sleeved with the first rotor unit and the second rotor unit;

the first stator unit and the second stator unit are both fixedly connected with the machine shell, the first stator unit is in contact with the first rotor unit through at least one group of first brush assemblies, and the second stator unit is in contact with the second rotor unit through at least one group of second brush assemblies; the first brush assembly is electrically connected with the second brush assembly.

In one embodiment, the casing comprises a base, a front cover and a rear cover, wherein the base is internally provided with a containing cavity with openings at two sides, and the openings at two sides of the base are respectively detachably connected with the front cover and the rear cover; the rotating shaft is located in the accommodating cavity, and the output end of the rotating shaft penetrates through the front cover to extend out of the accommodating cavity.

In one embodiment, the first rotor unit comprises a first rotating disc fixedly connected with the rotating shaft, and a first armature plate and a first insulating plate which are arranged on the first rotating disc, wherein the first armature plate is fixedly connected with the first rotating disc through the first insulating plate; the second rotor unit include with pivot fixed connection's second carousel and setting are in second armature piece and second insulating piece on the second carousel, the second armature piece pass through the second insulating piece with second carousel fixed connection.

In one embodiment, the first stator unit comprises a first mounting plate fixedly connected with the casing and a plurality of first magnetic steels arranged on the first mounting plate, and the first magnetic steels are circumferentially distributed on the first mounting plate at intervals on one side close to the first armature plate; the second stator unit includes with casing fixed connection's second mounting panel and sets up a plurality of second magnet steel on the second mounting panel, and is a plurality of second magnet steel is along circumference interval distribution on being close to the second mounting panel of second armature piece one side.

In one embodiment, the first brush assembly is fixedly connected with the second mounting plate, faces the first rotor unit and is in contact with the first armature plate; the second brush assembly is fixedly connected with the first mounting plate, faces the second rotor unit and is in contact with the second armature plate.

In one embodiment, the first rotary disc is provided with a first shaft shoulder which protrudes in the radial direction, and the first armature plate is axially abutted against the first shaft shoulder through a first insulation plate when being fixed on the first rotary disc; the second rotary table is provided with a second shaft shoulder protruding along the radial direction, and the second armature plate is axially abutted against the second shaft shoulder through a second insulating sheet when being fixed on the first rotary table.

In one embodiment, the rotor assembly further comprises a bearing assembly disposed outside the housing on a side adjacent the first rotor unit; the bearing assembly comprises a bearing seat, a plurality of bearings and a sealing element, the outer diameters of the bearings are fixedly connected with the bearing seat, and the inner diameters of the bearings are sleeved on the rotating shaft; the output end of the rotating shaft extends out of the bearing seat, and the inside of the bearing seat is sealed through a sealing element; and the bearing seat is fixedly connected with the shell.

In an embodiment, a groove located at one side of the bearing seat is formed in the middle of the first rotary disc, and the groove can accommodate at least part of the bearing seat, so that when the bearing seat is fixedly connected with the casing, at least part of the bearing seat is embedded into the groove of the first rotary disc.

In one embodiment, the first brush assemblies are arranged into 2 groups, the second brush assemblies are arranged into 2 groups, and the leads of the two groups of first brush assemblies are respectively and electrically connected with the leads of the two groups of second brush assemblies to be respectively used as the positive leads and the negative leads of the motor output; the shell is provided with at least one wire outlet hole for leading out the positive lead and the negative lead.

The utility model also provides a marine hatch door mechanism that opens and shuts, adopt as above arbitrary embodiment a high-power direct current flat motor.

Based on the above, compared with the prior art, the utility model provides a high-power flat direct current motor is through the design to two sets of stator unit, two sets of rotor unit and two sets of brush subassemblies for the motor can bear the high-power output of short time, simultaneously through the rational arrangement of structure, makes the compact structure of motor, and occupation space is little, and is applicable in various installation occasions.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts; in the following description, the drawings are described with reference to the drawing direction of the elements in the drawings unless otherwise specified.

Fig. 1 is a front view of a high-power dc flat motor according to the present invention;

FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;

FIG. 3 is an assembled front view of the housing, the first stator unit, and the first and second brush assemblies;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;

fig. 5 is a cross-sectional view of the first brush assembly.

Reference numerals:

10 casing 11 base 12 front cover

20 shaft 30 first rotor unit 40 second rotor unit

13 rear cover 50 first stator unit 60 second stator unit

70 first brush assembly 80 second brush assembly 71 brush holder

72 spring 14 covers 73 the brush element

31 first turntable 32 first armature plate 33 first insulating plate

41 second rotary disk 42 second armature disk 43 second insulating disk

31a first shoulder 41a second shoulder 51 first mounting plate

52 first magnet 61 second mounting plate 62 second magnet

90 bearing assembly 91 bearing seat 92 bearing

93 seal 31b groove 15 outlet hole

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; the technical features designed in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that all terms (including technical terms and scientific terms) used in the present invention have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, and cannot be construed as limiting the present invention; it will be further understood that terms, as used herein, should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

In order to solve the problems that the traditional wire feeding motor has poor voltage bearing capability of a small-sized motor and cannot meet the use requirement of a high-voltage welding machine and the problem that the large-sized motor has enough voltage bearing capability but cannot meet the use occasion with limited installation space, please refer to fig. 1 and fig. 2, the utility model provides a high-power direct current flat motor, which at least comprises a casing 10 and a rotating shaft 20 rotatably connected with the casing 10; the rotor comprises a first rotor unit 30 and a second rotor unit 40 which are sleeved on the rotating shaft 20, and a first stator unit 50 and a second stator unit 60 which are arranged between the first rotor unit 30 and the second rotor unit 40.

Specifically, the casing 10 includes a base 11, a front cover 12 and a rear cover 13, the base 11 has a containing cavity with openings at two sides, and the openings at two sides of the base 11 are detachably connected with the front cover 12 and the rear cover 13 respectively; the rotating shaft 20 is located in the accommodating cavity, and the output end of the rotating shaft 20 passes through the front cover 12 and extends out of the accommodating cavity. Wherein, the detachable connection can adopt the modes of threaded connection, buckle connection and the like. Preferably, the front cover 12 and the rear cover 13 are both opened with a through hole, wherein the through hole of the front cover 12 is used for the output end of the rotating shaft 20 to pass through the front cover 12. The casing 10 further includes a cover 14 fixedly connected to the rear cover 13, and the cover 14 is used for sealing the through hole of the rear cover 13. Through the structure setting of above-mentioned casing 10 to be favorable to the assembly to the motor, make things convenient for assembly quality or maintainer to the dismouting of motor. It should be noted that the shapes and configurations of the base 11, the front cover 12 and the rear cover 13 can be set according to the layout of the internal components of the actual motor, and are not limited herein.

The first rotor unit 30 and the second rotor unit 40 are axially spaced and sleeved on the rotating shaft 20, including but not limited to mounting by using shaft assembling structures such as shoulder clamps, sleeves, keys, set screws, clamping members and the like, which are common in the art. Wherein the first rotor unit 30 and the second rotor unit 40 may select a suitable type of armature, such as an armature winding or armature plate, according to the actual working requirements.

The first stator unit 50 and the second stator unit 60 are fixedly connected with the casing 10, the first stator unit 50 is in contact with the first rotor unit 30 through at least one set of first brush assemblies 70, and the second stator unit 60 is in contact with the second rotor unit 40 through at least one set of second brush assemblies 80; the first brush assembly 70 is electrically connected to the second brush assembly 80. The first stator unit 50 and the second stator unit 60 may also be configured to fit the first rotor unit 30 and the second rotor unit 40 according to actual working requirements.

As shown in fig. 5, each of the first and second brush assemblies 70 and 80 may include a brush holder 71, a spring 72, and a brush member 73, wherein the spring 72 is disposed inside the brush holder 71, and one end of the brush member 73 is in contact with the first spring 72 and the other end is in contact with the armature plate. This arrangement ensures that the brush member 73 is maintained in continuous close contact with the armature plate as it is continuously worn under the pressure of the spring 72. In this embodiment, the brush holder 71 is preferably a rubber sleeve with a concave hole inside, and the spring 72 is preferably a coil spring, and the radial dimension of the coil spring is slightly smaller than the concave hole of the rubber sleeve, so that the coil spring is embedded in the concave hole and plays a role of axial limiting. The brush member 73 may include a brush, a brush holding copper sleeve fitted to an inner and outer diameter of the brush, and a lead wire drawn out of the brush, a wire stud provided on the brush holder 71.

The number of the first brush assemblies 70 and the second brush assemblies 80 can be set according to actual working requirements, and preferably, the number of the first brush assemblies 70 is 2, and the number of the second brush assemblies 80 is 2 in the embodiment, so as to improve the operating efficiency of the motor. The leads of the two groups of first brush assemblies 70 are respectively and electrically connected with the leads of the two groups of second brush assemblies 80 to be respectively used as the positive leads and the negative leads of the motor output; at least one wire outlet hole 15 is formed in the casing 10 for leading out the positive and negative wires, and the connection manner of the wires can refer to the dotted line shown in fig. 3.

Wherein, a first loop of the motor is formed among the first stator unit 50, the first brush assembly 70 and the first rotor unit 30, and is used for outputting power; a second loop of the motor is formed among the second stator unit 60, the second brush assembly 80 and the second rotor unit 40, and is used for outputting power. When the motor is running, the first circuit and the second circuit work simultaneously and share the same rotating shaft 20. Compared with the traditional single-loop motor, the output power of the high-power direct-current flat motor provided by the embodiment can be 2 times that of the traditional single-loop motor, so that the power is increased, and the motor can bear high-power output in a short time.

In a preferred embodiment, to reduce the size of the motor, the rotor unit may employ an armature plate. Specifically, the first rotor unit 30 includes a first rotary disc 31 fixedly connected to the rotary shaft 20, and a first armature plate 32 and a first insulation plate 33 provided on the first rotary disc 31, the first armature plate 32 being fixedly connected to the first rotary disc 31 through the first insulation plate 33; the second rotor unit 40 includes a second rotary disk 41 fixedly connected to the rotary shaft 20, and a second armature plate 42 and a second insulation plate 43 disposed on the second rotary disk 41, wherein the second armature plate 42 is fixedly connected to the second rotary disk 41 through the second insulation plate 43.

The fixed connection between the first rotary disk 31 and the rotary shaft 20 and the fixed connection between the second rotary disk 41 and the rotary shaft 20 may include, but are not limited to, a key connection, a set screw, a pin connection, a shoulder limit, a collar limit, a sleeve limit, and the like. In the present embodiment, as shown in fig. 2, the first rotating disk 31 and the rotating shaft 20 are preferably in interference fit through shaft knurling, and the second rotating disk 41 and the rotating shaft 20 are preferably locked through a female-end set screw.

Preferably, the first rotary disk 31 has a first radially protruding shoulder 31a, and the first armature plate 32 is axially abutted against the first shoulder 31a through the first insulating plate 33 when fixed on the first rotary disk 31; the second rotary disk 41 has a second radially protruding shoulder 41a, and the second armature plate 42 is axially abutted against the second shoulder 41a through a second insulating plate 43 when fixed on the first rotary disk 31. Further, the first insulating sheet 33 is bonded to the first armature sheet 32 and the first rotating disk 31, respectively, to form an armature assembly, and the second insulating sheet 43 is bonded to the second armature sheet 42 and the second rotating disk 41, respectively, to form an armature assembly. Wherein the first and second insulating sheets 33 and 43 function to insulate current.

Preferably, as shown in fig. 3 and 4, the first stator unit 50 includes a first mounting plate 51 fixedly connected to the housing 10 and a plurality of first magnetic steels 52 disposed on the first mounting plate 51, and the plurality of first magnetic steels 52 are circumferentially distributed on the first mounting plate 51 at intervals on one side close to the first armature plate 32;

the second stator unit 60 includes a second mounting plate 61 fixedly connected with the casing 10 and a plurality of second magnetic steels 62 arranged on the second mounting plate 61, and the second magnetic steels 62 are distributed on the second mounting plate 61 close to one side of the second armature plate 42 along the circumferential interval.

The number of the first magnetic steel 52 and the second magnetic steel 62 can be set according to actual working requirements, and is not limited herein. The number of the present embodiment is preferably 8. Preferably, the first and second magnets 52, 62 can be fixed on the first and second mounting plates 51, 61 respectively by anaerobic adhesive. Of course, other removable or non-removable fixing methods can be used, and are not limited herein.

Preferably, the first mounting plate 51 and the second mounting plate 61 are disc-shaped, a snap ring is disposed inside the housing 10, and the first mounting plate 51 and the second mounting plate 61 are symmetrically abutted against the snap ring to fix the housing.

In an alternative embodiment, the first brush assembly 70 is fixedly attached to the second mounting plate 61 and faces the first rotor unit 30 and contacts the first armature plate 32; the second brush assembly 80 is fixedly coupled to the first mounting plate 51 and faces the second rotor unit 40 and contacts the second armature plate 42. Through setting up the brush subassembly on the mounting panel, can effectively utilize the inner space of motor for the inside structure of motor is compacter. Further, all seted up logical groove on first mounting panel 51 and the second mounting panel 61 and be used for placing brush yoke 71, wherein brush yoke 71 passes logical groove and is fixed with the mounting panel joint to effectively utilize the space between first mounting panel 51 and the second mounting panel 61 to arrange the brush subassembly, can further effectively save the occupation space of motor, avoid casing 10 to need design bigger space and place the brush subassembly.

Preferably, as shown in fig. 2, a bearing assembly 90 is further included, the bearing assembly 90 being disposed outside the casing 10 near one side of the first rotor unit 30; the bearing assembly 90 comprises a bearing seat 91, a plurality of bearings 92 and a sealing element 93, wherein the outer diameters of the bearings 92 are fixedly connected with the bearing seat 91, and the inner diameters of the bearings 92 are sleeved on the rotating shaft 20; the output end of the rotating shaft 20 extends out of the bearing seat 91, and the inside of the bearing seat 91 is sealed through a sealing element 93; the bearing seat 91 is fixedly connected with the casing 10.

The type and number of the bearings 92 can be selected according to actual working conditions, and the fit between the bearings 92 and the rotating shaft 20 can also be selected according to actual working conditions, such as clearance fit, transition fit or interference fit. The fixed connection of the bearing 92 to the bearing block 91 may be assembled through the aperture with a circlip. The sealing member 93 may be a felt ring, a dust-proof gasket, an adjusting gasket, a spring collar, or the like, and may be set according to actual requirements of the motor.

In a preferred scheme, in order to enable the structure of the motor to be more compact, redundant space inside the motor is effectively utilized. The first rotating disk 31 is provided with a groove 31b at a side of the bearing seat 91 at a middle portion thereof, and the groove 31b can accommodate at least a portion of the bearing seat 91, so that when the bearing seat 91 is fixedly connected with the casing 10, at least a portion of the bearing seat 91 is embedded into the groove 31b of the first rotating disk 31.

The utility model also provides a marine hatch door mechanism that opens and shuts, adopt as above arbitrary embodiment a high-power direct current flat motor. Through the arrangement of the high-power direct-current flat motor, the high-power direct-current flat motor can bear the high-power output in a short time in the use of the ship cabin door opening and closing mechanism, and the waste of the working capacity and energy of the motor caused by the traditional selection of the alternating-current high-power motor is avoided.

To sum up, compared with the prior art, the utility model provides a high-power direct current flat motor and marine hatch door mechanism that opens and shuts guarantees that it rotates the stable while of operation for the motor can bear the high-power output of short time, simultaneously through the rational arrangement of structure, makes the simple structure and the compactness of motor, has not only reduced the volume of motor, saves installation space, has still reduced manufacturing cost, can be adapted to all kinds of occasions.

It should be noted that, the specific fixed connection manner of each of the above parts may be selected according to actual working requirements, and may be detachable or non-detachable, for example, conventional means such as bolts, screws, rivets, pins, welding, clamping, and bonding, and is not limited herein.

In addition, it will be appreciated by those skilled in the art that although a number of problems exist in the prior art, each embodiment or aspect of the present invention may be improved only in one or a few aspects, without necessarily simultaneously solving all the technical problems listed in the prior art or in the background. It will be understood by those skilled in the art that nothing in a claim should be taken as a limitation on that claim.

Although terms such as a housing, a front cover, a rear cover, a base, a front cover, a rotating shaft, a first rotor unit, a second rotor unit, a rear cover, a first stator unit, a second stator unit, a first brush assembly, a second brush assembly, a brush holder, a spring, a cover, a brush member, a first rotary disk, a first armature plate, a first insulating plate, a second rotary disk, a second armature plate, a second insulating plate, a first shoulder, a second shoulder, a first mounting plate, a first magnetic steel, a second mounting plate, a second magnetic steel, a bearing assembly, a bearing seat, a bearing, a seal, a groove, a wire outlet, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention; the terms "first," "second," and the like in the description and in the claims, and in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A high-power direct current flat motor is characterized in that: comprises a casing and a rotating shaft which is rotatably connected with the casing; the rotor comprises a rotating shaft, a first stator unit, a second stator unit, a first rotor unit, a second rotor unit, a first stator unit and a second stator unit, wherein the rotating shaft is sleeved with the first rotor unit and the second rotor unit;

the first stator unit and the second stator unit are fixedly connected with the machine shell, the first stator unit is contacted with the first rotor unit through at least one group of first brush assemblies, and the second stator unit is contacted with the second rotor unit through at least one group of second brush assemblies; the first brush assembly is electrically connected with the second brush assembly.

2. The high power dc flat motor according to claim 1, wherein: the machine shell comprises a machine base, a front cover and a rear cover, wherein the machine base is internally provided with a containing cavity with openings at two sides, and the openings at two sides of the machine base are respectively detachably connected with the front cover and the rear cover; the pivot is located the holding intracavity, just the output of pivot passes preceding cover and extends the holding chamber.

3. The high power dc flat motor according to claim 1, wherein: the first rotor unit comprises a first rotating disc fixedly connected with the rotating shaft, and a first armature sheet and a first insulating sheet which are arranged on the first rotating disc, and the first armature sheet is fixedly connected with the first rotating disc through the first insulating sheet;

the second rotor unit includes with pivot fixed connection's second carousel and setting are in second armature piece and second insulating piece on the second carousel, the second armature piece pass through the second insulating piece with second carousel fixed connection.

4. The high power flat dc motor according to claim 3, wherein: the first stator unit comprises a first mounting plate fixedly connected with the shell and a plurality of first magnetic steels arranged on the first mounting plate, and the first magnetic steels are circumferentially distributed on the first mounting plate at intervals on one side close to the first armature plate;

the second stator unit includes with casing fixed connection's second mounting panel and sets up a plurality of second magnet steel on the second mounting panel, and is a plurality of second magnet steel is along circumference interval distribution on being close to the second mounting panel of second armature piece one side.

5. The high power dc flat motor according to claim 4, wherein: the first brush assembly is fixedly connected with the second mounting plate, faces the first rotor unit and is in contact with the first armature plate; the second brush assembly is fixedly connected with the first mounting plate, faces the second rotor unit and is in contact with the second armature plate.

6. The high power flat dc motor according to claim 3, wherein: the first rotary disc is provided with a first shaft shoulder protruding along the radial direction, and the first armature plate is axially abutted against the first shaft shoulder through a first insulating sheet when being fixed on the first rotary disc;

the second rotary table is provided with a second shaft shoulder protruding along the radial direction, and the second armature plate is axially abutted against the second shaft shoulder through a second insulating sheet when being fixed on the first rotary table.

7. The high power flat dc motor according to claim 3, wherein: the bearing assembly is arranged on the outer side of the shell close to one side of the first rotor unit; the bearing assembly comprises a bearing seat, a plurality of bearings and a sealing element, the outer diameters of the bearings are fixedly connected with the bearing seat, and the inner diameters of the bearings are sleeved on the rotating shaft; the output end of the rotating shaft extends out of the bearing seat, and the inside of the bearing seat is sealed through a sealing element; and the bearing seat is fixedly connected with the shell.

8. The high power dc flat motor according to claim 7, wherein: the middle part of the first rotary disc is provided with a groove positioned on one side of the bearing seat, and the groove can accommodate at least part of the bearing seat, so that when the bearing seat is fixedly connected with the casing, at least part of the bearing seat is embedded into the groove of the first rotary disc.

9. The high power flat direct current motor according to any of claims 1-8, characterized in that: the first brush assemblies are arranged into 2 groups, the second brush assemblies are arranged into 2 groups, and leads of the two groups of first brush assemblies are respectively and electrically connected with leads of the two groups of second brush assemblies to be respectively used as a positive lead and a negative lead of the motor output; and at least one wire outlet hole is formed in the shell and used for leading out the positive lead and the negative lead.

10. The utility model provides a marine hatch door mechanism that opens and shuts which characterized in that: use of a high power dc flat motor according to any of claims 1-9.

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