CN220067048U - Motor grounding structure and motor - Google Patents

Abstract

The utility model discloses a motor grounding structure and a motor, wherein the motor grounding structure comprises a shell, an aviation plug support, an aviation plug and a grounding lead; the shell is provided with an inserting port; the aviation plug support is arranged on the outer side wall of the shell and extends outwards around the plug interface perpendicular to the outer side wall, and is of an integrally formed structure with the shell; part of the aviation plug is inserted into the plug interface and is fixed with the aviation plug support, and the aviation plug is provided with a grounding terminal; one end of the grounding lead is connected with the grounding terminal, and the other end of the grounding lead is connected with the inner wall of the shell through a grounding piece. The technical scheme of the utility model can solve the problem of poor IP protection level of the whole machine.

Description

Motor grounding structure and motor

Technical Field

The utility model relates to the technical field of motor equipment, in particular to a motor grounding structure and a motor.

Background

When the motor is installed, in order to prevent the electric leakage from causing human injury and improve the safety of the motor, a grounding structure is required to be arranged on a shell of the motor.

In the related art, a motor grounding structure is usually located at the outer side of a motor casing, an aviation plug support is installed at the outer side of the casing, an aviation plug is inserted on the aviation plug support, one end of a grounding lead is connected with a grounding terminal (pin needle) of the aviation plug, the other end of the grounding lead is connected with the casing through a grounding piece (such as a grounding screw), and the casing is made of metal materials, so that the conduction of the whole loop is ensured. The aviation plug support is installed on the outer side of the shell through the screw, and a sealing piece is required to be installed between the aviation plug support and the shell, however, when the motor is assembled in batches, the sealing piece is sometimes assembled in place, so that glue leakage easily occurs at the position between the aviation plug support and the shell in the glue filling process, in addition, 4 screw holes of the aviation plug support are fixed on the shell and are usually open, after the screw is fastened, gaps still remain to be communicated inside and outside a cavity of the shell, so that glue leakage easily occurs at the gaps between the screw holes and the screw, and the IP protection level of the whole machine is poor.

Disclosure of Invention

The utility model mainly aims to provide a motor grounding structure and a motor, and aims to solve the problem of poor IP protection level of a complete machine.

In order to achieve the above object, the present utility model provides a motor grounding structure, comprising:

a housing having an interface;

the aviation plug support is arranged on the outer side wall of the shell and extends outwards around the plug-in port, and the aviation plug support is of an integrally formed structure with the shell;

the aviation plug is partially inserted into the plug-in port and is partially fixed with the aviation plug support, and the aviation plug is provided with a grounding terminal;

and one end of the grounding lead is connected with the grounding terminal, and the other end of the grounding lead is connected with the inner wall of the shell through a grounding piece.

In an embodiment of the utility model, a connection hole is formed in an inner wall of the casing, and the other end face of the grounding lead is connected with the connection hole through the grounding piece.

In an embodiment of the present utility model, a surface on which the inner wall of the housing is defined is a projection surface, and a projection of the connection hole on the projection surface falls into a projection of the aerial socket on the projection surface.

In an embodiment of the utility model, an inner wall of the casing has a connection inclined plane, and the connection hole is opened on the connection inclined plane.

In an embodiment of the present utility model, defining the angle α between the connection inclined plane and the axis of the casing, the condition is satisfied: alpha is more than or equal to 45 degrees and less than or equal to 60 degrees.

In an embodiment of the present utility model, defining an angle β between the axis of the connection hole and the axis of the housing, the condition is satisfied: beta is larger than or equal to 45 degrees and smaller than or equal to 60 degrees, and the axis of the connecting hole is perpendicular to the connecting inclined plane.

In an embodiment of the utility model, a limiting piece is arranged on the peripheral wall of the aviation plug, and the limiting piece is abutted with the end face, away from the shell, of the aviation plug support.

In an embodiment of the utility model, a first fixing hole is formed in a side, close to the casing, of the limiting piece, a second fixing hole is formed in an end face, away from the casing, of the aerial insertion support, and the motor grounding structure further comprises a connecting piece, wherein the connecting piece penetrates through the first fixing hole and is inserted into the second fixing hole.

In an embodiment of the utility model, a sealing element is arranged between the limiting element and the aviation plug support.

In an embodiment of the utility model, a limiting groove is further formed in an end face, away from the shell, of the aviation plug support, and the sealing element is installed in the limiting groove.

The utility model also provides a motor, which comprises the motor grounding structure.

In the motor grounding structure provided by the utility model, because the aviation plug support and the shell are of an integrally formed structure, a gap does not exist between the aviation plug support and the shell, and a screw hole is not required to be formed on the aviation plug support, so that the problem that glue leakage is easy to occur at the position between the aviation plug support and the shell in the glue filling process can be effectively solved, and meanwhile, the problem that glue leakage is easy to occur at the gap between the screw hole and the screw because the gap between the screw hole and the screw is communicated with the inside and outside of the shell cavity can be solved, thereby improving the problem of poor IP protection grade of the whole machine.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a grounding structure of a motor according to the present utility model;

FIG. 2 is a schematic view of a portion of an embodiment of a grounding structure of a motor according to the present utility model;

FIG. 3 is a schematic view of a portion of an embodiment of a grounding structure of a motor according to the present utility model;

FIG. 4 is a partial cross-sectional view of an embodiment of a motor grounding structure of the present utility model;

FIG. 5 is a cross-sectional view of an embodiment of the motor of the present utility model;

FIG. 6 is a partial cross-sectional view of an embodiment of the motor of the present utility model;

fig. 7 is a partial enlarged view at a in fig. 6.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				1000	Motor with a motor housing	40	Aviation plug
100	Motor grounding structure	41	Grounding terminal
				10	Casing of machine	42	Limiting piece
11	Plug-in connector	50	Grounding lead
				12	Connecting hole	60	Sealing element
13	Connection inclined plane	200	Stator assembly
				20	Aviation plug support	300	Rotor assembly
21	Second fixing hole	400	Circuit board
				22	Limiting groove	500	Opposite-inserting skeleton
30	Grounding piece	600	Rotating shaft

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a motor grounding structure 100 and a motor 1000, which aim to solve the problems of poor IP protection level and the like of a complete machine.

The following will describe the specific structure of the motor grounding structure 100 and the motor 1000 of the present utility model:

referring to fig. 1 to 4 and 7 in combination, in an embodiment of the motor grounding structure 100 of the present utility model, the motor grounding structure 100 includes a housing 10, an air plug support 20, a grounding member 30, an air plug 40 and a grounding lead 50; the casing 10 has an interface 11; the aviation plug support 20 is arranged on the outer side wall of the shell 10 and extends outwards around the plug connector 11, and the aviation plug support 20 is of an integrally formed structure with the shell 10; part of the aviation plug 40 is inserted into the plug interface 11 and is fixed with the aviation plug support 20, and the aviation plug 40 is provided with a grounding terminal 41; one end of the ground lead 50 is connected to the ground terminal 41, and the other end of the ground lead 50 is connected to the inner wall of the cabinet 10 through a ground member 30. In some embodiments, the socket 20 extends substantially perpendicular to the outer side wall of the housing 10, however, in other embodiments, the socket 20 may be in a flare shape, and the shape of the socket 20 is not particularly limited in the present utility model, so long as the socket 20 and the plug 40 can be effectively connected.

It can be understood that in the motor grounding structure 100 provided by the utility model, because the avionics support 20 and the casing 10 are integrally formed, no gap exists between the avionics support 20 and the casing 10, and screw holes are not required to be formed on the avionics support, so that the problem that glue leakage is easy to occur at the position between the avionics support 20 and the casing 10 in the glue filling process can be effectively solved, and meanwhile, the problem that glue leakage is easy to occur at the gap between the screw holes and the screws because the gap between the screw holes and the screws is communicated with the inside and outside of the cavity of the casing 10 can be solved, thereby improving the problem that the IP protection level of the whole machine is poor.

In this embodiment, the casing 10 may be made of metal materials such as aluminum, aluminum alloy, iron, etc.

In some embodiments, the grounding member 30 may be a grounding metal structure such as a grounding screw, a grounding bolt, or the like, to perform the function of connecting the grounding lead 50 and the circuit conduction.

In some embodiments, the housing 10 of the aerial plug 40 may be a metal housing 10, or may be an injection molded housing 10.

Further, referring to fig. 1 to 4 and 7 in combination, in an embodiment of the motor grounding structure 100 of the present utility model, a connecting hole 12 is formed on an inner wall of the casing 10, and an end of the grounding lead 50 away from the grounding terminal 41 is connected to the connecting hole 12 through the grounding member 30. Thus, in the assembly process, the end of the grounding lead 50 far away from the grounding terminal 41 can be quickly connected at the connecting hole 12 of the inner wall of the casing 10 by using the grounding member 30, so that the quick connection between the grounding lead 50 and the inner wall of the casing 10 can be realized, and the connection strength between the grounding lead 50 and the inner wall of the casing 10 can be ensured.

In other embodiments, the connection hole 12 may be formed on an outer side wall of the casing 10, and the grounding member 30 may be disposed outside the casing 10.

It should be noted that, if the connecting hole 12 is formed in the outer side wall of the casing 10, and accordingly, the grounding member 30 needs to be disposed outside the casing 10, then the outlet cavity of the motor 1000 needs to be separately designed with extra space and height to satisfy the space of the grounding wire 50, which results in a complex structural design, and increases difficulty in miniaturizing the motor 1000, and the screwed grounding member 30 sometimes penetrates the casing 10 to bear against the stator assembly 200 inside the casing 10, resulting in poor tightness of the grounding terminal 41 and further resulting in a risk of poor contact of the grounding wire 50; in this way, the connecting hole 12 is formed in the inner wall of the casing 10, and accordingly, the grounding member 30 can be disposed in the casing 10, so that the problem of the space of the grounding lead 50 is not required to be separately designed with extra space and height, and the height of the outlet cavity of the motor 1000 can be reduced, thereby providing convenience for the miniaturized design of the motor 1000; in addition, the height of the air insert support 20 can be reduced, so that the cost of the motor 1000 can be reduced; further, the grounding member 30 does not penetrate the casing 10 and abuts against the stator assembly 200 inside the casing 10, so that the risk of poor contact of the grounding lead 50 can be reduced.

In some embodiments, the aviation plug 40 further has three pins, the three pins are respectively connected to the circuit board 400 of the motor 1000 through U, V, W three-phase terminals, and U, V, W three-phase terminals are all disposed through the plug connection 11 of the casing 10.

Further, referring to fig. 1 to 4 and fig. 7 in combination, in an embodiment of the motor grounding structure 100 of the present utility model, a surface on which an inner wall of the casing 10 is defined is a projection plane, and a projection of the connection hole 12 on the projection plane falls into a projection of the socket support 20 on the projection plane, that is, the connection hole 12 is disposed corresponding to the socket support 20.

The thickness of the casing 10 is thinner, which results in a shallower depth of the connection hole 12, so that the length of the grounding member 30 screwed into the connection hole 12 is shorter, and the grounding member 30 is easy to slip during assembly; in this way, by arranging the connecting hole 12 corresponding to the navigation plug support 20, the connecting hole 12 can be extended directly to the navigation plug support 20, so as to increase the length of the grounding piece 30 screwed into the connecting hole 12, and thus, the phenomenon that the grounding piece 30 is easy to slip can be improved; in addition, the connecting hole 12 is arranged corresponding to the aviation plug support 20, so that the shell 10 is not opened to lead the connecting hole 12 to be communicated with the outside, and the problem that the whole machine has a poor IP protection level in a certain proportion due to the communication between the connecting hole 12 and the outside can be avoided.

Further, referring to fig. 1 to 4 and fig. 7 in combination, in an embodiment of the motor grounding structure 100 of the present utility model, an inner wall of the casing 10 has a connection inclined plane 13, and the connection hole 12 is formed on the connection inclined plane 13.

By arranging the connecting hole 12 on the connecting inclined plane 13 of the inner wall of the casing 10, the grounding member 30 can not prop against the stator assembly 200, so that the risk of poor contact of the grounding lead 50 can be effectively reduced.

Further, in order to further prevent the grounding member 30 from abutting against the stator assembly 200 and causing the problem of poor contact of the grounding lead 50, referring to fig. 7, in an embodiment of the motor grounding structure 100 of the present utility model, an angle α between the connecting inclined plane 13 and the axis of the casing 10 may be defined, and then the following conditions are satisfied: alpha is more than or equal to 45 degrees and less than or equal to 60 degrees.

By controlling the included angle between the connecting inclined plane 13 and the axis of the casing 10 to be 45-60 degrees, the grounding member 30 can be further prevented from propping against the stator assembly 200 while the grounding member 30 is convenient to install, and accordingly the risk of poor contact of the grounding lead 50 can be effectively reduced.

Further, in order to facilitate the assembly of the grounding member 30 and the complete machine, referring to fig. 4 and 7, in an embodiment of the motor grounding structure 100 of the present utility model, an included angle β between the axis of the connecting hole 12 and the axis of the casing 10 may be defined, and then the following conditions are satisfied: beta is larger than or equal to 45 degrees and smaller than or equal to 60 degrees, and the axis of the connecting hole 12 is vertical to the connecting inclined plane 13.

So set up, through controlling the contained angle between the axis of connecting hole 12 and the axis of casing 10 between 45 ~ 60 to make the axis of connecting hole 12 set up perpendicularly with connecting inclined plane 13, in the assembly process, operating personnel can stretch into the inside of casing 10 with grounding piece 30 through the opening of casing 10 one side, in order to insert grounding piece 30 smoothly in connecting hole 12, simultaneously, also be convenient for be connected with grounding piece 30 smoothly with the one end of ground lead 50, and grounding piece 30 can not influence the assembly of other structures, in order to the assembly of complete machine.

In the prior art, there is a scheme of disposing the grounding member 30 on the rear end cover, and in order to facilitate the installation of the grounding member 30, the axis of the connecting hole 12 is generally disposed parallel to the axis of the rear end cover, so that the installation of the grounding member 30 is facilitated, but other structures are inconvenient, thereby resulting in the inconvenience of the assembly of the whole machine. The grounding piece 30 is arranged on the machine shell 10, the included angle between the axis of the connecting hole 12 and the axis of the machine shell 10 is controlled to be 45-60 degrees, and the axis of the connecting hole 12 and the connecting inclined plane 13 are arranged vertically, so that the grounding piece 30 is convenient to install, and the whole machine assembly is convenient.

Further, referring to fig. 6 and 7 in combination, in an embodiment of the motor grounding structure 100 of the present utility model, a circumferential wall of the aviation plug 40 is provided with a limiting member 42, and the limiting member 42 abuts against an end surface of the aviation support 20 away from the casing 10.

So set up, when the plug-in aviation plug 40, when the terminal surface that aviation plug support 20 kept away from casing 10 is butt-jointed to the locating part 42 on aviation plug 40, can be with aviation plug 40 spacing fixed on aviation plug support 20 to guarantee aviation plug 40's installation stability.

In some embodiments, the limiting member 42 may be disposed circumferentially around the aviation plug 40 to increase the contact area between the limiting member 42 and the aviation plug support 20, thereby substantially improving the installation stability of the aviation plug 40.

For example, screws may be used to secure the stop 42 to the end of the cradle 20 remote from the housing 10.

Further, referring to fig. 2 and 4 in combination, in an embodiment of the motor grounding structure 100 of the present utility model, a first fixing hole (not shown) is formed on a side of the limiting member, which is close to the casing 10, and a second fixing hole 21 is formed on an end surface of the avionics insertion support 20, which is far away from the casing 10, and the motor grounding structure 100 further includes a connecting member (not shown) penetrating the first fixing hole and being inserted into the second fixing hole 21.

So configured, during the assembly process, the housing 10 fixedly mounts the aerial plug 40 on the aerial plug support 20 by using the connector to pass through the first fixing hole and insert into the second fixing hole 21, so as to prevent the aerial plug 40 from being shifted or even falling during the handling or use process, thereby causing the problem of poor contact of the ground lead 50; in addition, since the second fixing hole 21 is formed in the aerial plug support 20 and the aerial plug support 20 is high, the second fixing hole 21 does not open the casing 10, and thus the problem of poor IP protection level caused by the second fixing hole 21 opening the casing 10 can be avoided.

In some embodiments, the first and second fixing holes 21 may each be a screw hole, and the connection member may be a screw.

In addition, in order to further improve the installation stability of the aviation plug 40, a plurality of first fixing holes and a plurality of second fixing holes 21 may be provided, and a plurality of connecting pieces may be provided, and during the assembly process, each connecting piece may pass through one first fixing hole and be inserted into one second fixing hole 21, so that the aviation plug 40 may be sufficiently fixed on the aviation plug support 20.

Further, referring to fig. 6 and 7 in combination, in an embodiment of the motor grounding structure 100 of the present utility model, a sealing member 60 is disposed between the limiting member 42 and the socket support 20.

So set up, in the encapsulating process, can realize sealedly through sealing member 60 to prevent that the pouring sealant from leaking outward from the clearance between locating part 42 and the boat insert support 20, and the phenomenon of leaking glue appears.

Further, in order to ensure the installation stability of the sealing element 60, referring to fig. 4 and 7, in an embodiment of the motor grounding structure 100 of the present utility model, a limiting groove 22 may be further formed on an end surface of the aviation support 20 away from the casing 10, so that the sealing element 60 is installed in the limiting groove 22, and the sealing element 60 may be limited and fixed in the limiting groove 22.

Referring to fig. 5 to fig. 7 in combination, the present utility model further provides a motor 1000, where the motor 1000 includes the motor grounding structure 100 as described above, and the specific structure of the motor grounding structure 100 refers to the foregoing embodiments, and since the motor 1000 adopts all the technical solutions of all the foregoing embodiments, at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be described in detail herein.

In some embodiments, the motor 1000 further includes structures such as a stator assembly 200, a rotor assembly 300, and a circuit board 400, where the stator assembly 200, the rotor assembly 300, and the circuit board 400 are all installed inside the casing 10, the stator assembly 200 is sleeved outside the rotor assembly 300, the rotor assembly 300 is penetrated with a rotating shaft 600, and the circuit board 400 can be fixedly installed at one end of the stator assembly 200 through the opposite-plug framework 500, and the circuit board 400 can be disposed near the plug-in port 11 of the casing 10, so that three pins of the aviation plug 40 can be respectively connected to the circuit board 400 through U, V, W three-phase terminals.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (11)

1. A motor grounding structure, comprising:

a housing having an interface;

the aviation plug support is arranged on the outer side wall of the shell and extends outwards around the plug-in port, and the aviation plug support is of an integrally formed structure with the shell;

the aviation plug is partially inserted into the plug-in port and is partially fixed with the aviation plug support, and the aviation plug is provided with a grounding terminal;

and one end of the grounding lead is connected with the grounding terminal, and the other end of the grounding lead is connected with the inner wall of the shell through a grounding piece.

2. The motor grounding structure as claimed in claim 1, wherein the inner wall of the housing is provided with a connection hole, and the other end of the grounding wire is connected to the connection hole through the grounding member.

3. The motor grounding structure according to claim 2, wherein a surface on which an inner wall of the housing is defined is a projection surface, and a projection of the connection hole on the projection surface falls into a projection of the aviation plug support on the projection surface.

4. A motor grounding structure as in claim 3 wherein said inner wall of said housing has a connecting bevel, said connecting hole being open at said connecting bevel.

5. The motor grounding structure as claimed in claim 4, wherein an angle α between the connection inclined plane and the axis of the housing is defined, the condition is satisfied: alpha is more than or equal to 45 degrees and less than or equal to 60 degrees.

6. The motor grounding structure as claimed in claim 5, wherein an angle β between an axis defining the connection hole and an axis of the housing is defined, the condition is satisfied: beta is larger than or equal to 45 degrees and smaller than or equal to 60 degrees, and the axis of the connecting hole is perpendicular to the connecting inclined plane.

7. The motor grounding structure according to any one of claims 1 to 6, wherein a peripheral wall of the aviation plug is provided with a stopper abutting an end face of the aviation plug which is away from the housing.

8. The motor grounding structure of claim 7, wherein a first fixing hole is formed in a side, close to the casing, of the limiting piece, a second fixing hole is formed in an end face, away from the casing, of the aerial insertion support, and the motor grounding structure further comprises a connecting piece, and the connecting piece penetrates through the first fixing hole and is inserted into the second fixing hole.

9. The motor grounding structure of claim 7, wherein a seal is provided between said stop member and said air insert support.

10. The motor grounding structure of claim 9, wherein the end surface of said air insert support away from said housing is further provided with a limiting groove, and said sealing member is mounted in said limiting groove.

11. An electric machine comprising an electric machine grounding structure as claimed in any one of claims 1 to 10.