CN214480146U - Motor and electric appliance - Google Patents
Motor and electric appliance Download PDFInfo
- Publication number
- CN214480146U CN214480146U CN202120953356.2U CN202120953356U CN214480146U CN 214480146 U CN214480146 U CN 214480146U CN 202120953356 U CN202120953356 U CN 202120953356U CN 214480146 U CN214480146 U CN 214480146U
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- groove
- circuit board
- motor
- stator
- shell
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 51
- 230000002093 peripheral effect Effects 0.000 claims abstract description 29
- 238000001746 injection moulding Methods 0.000 claims abstract description 27
- 239000012778 molding material Substances 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims description 25
- 230000002787 reinforcement Effects 0.000 claims description 15
- 210000002421 cell wall Anatomy 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000005728 strengthening Methods 0.000 claims 4
- 230000002349 favourable effect Effects 0.000 abstract description 13
- 238000004806 packaging method and process Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model relates to a motor field provides a motor and electrical apparatus. The motor comprises a shell, a stator and a circuit board, wherein the stator and the circuit board are both arranged in a shell cavity of the shell, the circuit board is positioned on one side of the stator along the axial direction of the motor, and the stator and the circuit board are integrally encapsulated by injection molding materials; the inner peripheral wall of the shell is provided with a runner groove, the runner groove is filled with injection molding materials and is positioned on the outer side of the circuit board along the radial direction of the motor, and the circuit board and the groove wall of the runner groove are arranged at intervals; the runner groove is communicated from one side of the circuit board to the other side of the circuit board along the axial direction; the outer peripheral wall of the housing has a reinforcing portion projecting outward, the reinforcing portion being directed radially outward of the flow channel groove. The arrangement of the runner groove is beneficial to improving the packaging efficiency of the stator and the circuit board; moreover, the arrangement of the reinforcing part is favorable for improving the structural strength of the shell at the flow channel groove on the one hand, and is favorable for the miniaturization of the motor on the other hand.
Description
Technical Field
The utility model relates to a motor field specifically is to relate to a motor and electrical apparatus.
Background
The circuit board is arranged on one side of the stator along the axial direction of the existing motor, and the circuit board and the stator are packaged and fixed on the inner side of the shell together by adopting injection molding materials, so that the protection capability and the heat dissipation capability of the motor are favorably improved.
When the circuit board and the stator are subjected to injection molding and packaging operation, the injection molding material is often injected from one side of the circuit board, which is back to the stator, and then flows to one side of the circuit board, which faces the stator, through a gap between the circuit board and the shell, so that the circuit board and the stator are packaged by the injection molding material.
However, the circuit board has a blocking effect on the flow of the injection molding material, in order to realize smooth circulation of the injection molding material on two sides of the circuit board, a gap with a proper size needs to be formed between the circuit board and the housing, if the gap is smaller, the injection molding material is easy to flow smoothly, on one hand, the injection molding time is prolonged, the injection molding efficiency is lower, on the other hand, the gap between the circuit board and the stator can not be completely filled by the injection molding material, and the protection of the injection molding material on the motor cannot meet the preset requirement.
In addition, when the size of the circuit board meets the use requirement and the strength of the housing meets the design requirement, the increase of the size of the gap between the circuit board and the housing may increase the overall radial size of the housing, which is not favorable for the miniaturization of the motor.
In addition, some current motors are provided with the installation department in the periphery of casing and step down the recess, and the installation department is located the axial one end of casing, steps down the axial extension of recess along the casing, and it is just right in the axial with the installation department to step down the recess, and the installation department passes through bolt fixed connection with exterior structure to the fixed mounting to the motor is realized.
However, in this solution, in order to ensure the structural strength of the position of the abdicating groove corresponding to the circuit board, the radial dimension of the housing is further increased, which is more disadvantageous to the miniaturization of the motor.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model is to provide a motor that encapsulation efficiency is higher and be favorable to realizing the miniaturization of moulding plastics.
In order to achieve the above object, the motor provided by the present invention comprises a housing, a stator and a circuit board, wherein the stator and the circuit board are both installed in a housing cavity of the housing, the circuit board is located at one side of the stator along an axial direction of the motor, and the stator and the circuit board are integrally encapsulated by an injection molding material; the inner peripheral wall of the shell is provided with a runner groove, the runner groove is filled with injection molding materials and is positioned on the outer side of the circuit board along the radial direction of the motor, and the circuit board and the groove wall of the runner groove are arranged at intervals; the runner groove is communicated from one side of the circuit board to the other side of the circuit board along the axial direction; the outer peripheral wall of the housing has a reinforcing portion projecting outward, the reinforcing portion being directed radially outward of the flow channel groove.
Therefore, the arrangement of the runner groove is favorable for smoothly filling the injection molding material on the two sides of the circuit board and improving the packaging efficiency of the stator and the circuit board; and, the setting up of rib is favorable to promoting the structural strength of casing in runner groove department on the one hand, and on the other hand also can not wholly increase the overall dimension of motor, is favorable to the miniaturization of motor, is favorable to reducing the occupation of motor to installation space.
One preferred scheme is that the periphery wall of the shell is provided with a yielding groove, the yielding groove extends along the axial direction, and a groove wall of the yielding groove is provided with a reinforcing part.
From top to bottom, the setting in recess of stepping down and runner groove all leads to the thickness size attenuate of casing in corresponding position, sets up the rib on the cell wall of recess of stepping down and is favorable to pertinence ground to strengthen the structural strength of casing in corresponding position.
The further proposal is that the reinforcing part is only arranged on the groove wall of the yielding groove, and the reinforcing part is protruded in the groove cavity of the yielding groove.
Therefore, the arrangement of the reinforcing part can not lead to the increase of the occupation of the motor to the installation space, is favorable for the miniaturization of the motor and is favorable for saving the installation space of the motor.
The further scheme is that the axial one end of edge of casing has the installation department, and along the axial, the one end of the recess of stepping down is just right with the installation department, and the other end of the recess of stepping down link up the casing, and the rib sets up with the installation department interval.
Therefore, the installation and fixing operation of the motor cannot be influenced, and the structural strength of the shell at the corresponding position of the runner groove can be enhanced.
The mounting portion is provided with a mounting hole which penetrates through along the axial direction, and the mounting hole is communicated with the abdicating groove.
In a further aspect, the circuit board is located on a side of the stator away from the mounting portion in the axial direction.
The further scheme is that the reinforcing part comprises reinforcing ribs extending along the axial direction, the number of the reinforcing ribs is at least two, the reinforcing ribs are distributed at intervals along the groove walls of the yielding grooves, and the distribution direction of each reinforcing rib is perpendicular to the axial direction.
The further proposal is that along the axial direction, the section of the abdicating groove provided with the reinforcing part is a reinforcing section; the reinforcement includes a boss that integrally covers a groove wall of the reinforcement section.
In another preferred embodiment, the reinforcement portion extends from one side of the flow channel groove to the other side of the flow channel groove in the axial direction.
In another preferred scheme, the number of the runner grooves is at least two, and the runner grooves are distributed at intervals along the circumferential direction of the motor; or the runner groove is an annular groove extending along the circumferential direction of the motor.
The second purpose of the utility model is to provide an electric appliance, which comprises the motor.
Drawings
Fig. 1 is a cross-sectional view of an embodiment of the motor of the present invention, the cross-section of fig. 1 passing through the center line of the mounting hole and passing through the axis of the motor;
fig. 2 is a state diagram of the motor of the present invention when mounted with an external structure;
fig. 3 is a cross-sectional view of the embodiment of the motor of the present invention in the production process and at the injection molding encapsulation link, the cross-section of fig. 3 passes through the axis of the motor, and the included angle between the cross-section of fig. 3 and the cross-section of fig. 1 is 45 °;
fig. 4 is a structural diagram of a middle peripheral shell of an alternative embodiment of the motor of the present invention.
Detailed Description
Motor and electrical apparatus embodiment:
the electrical apparatus of this embodiment is industrial robot, for example industrial robot hand, certainly in the utility model discloses an in other embodiments, the electrical apparatus also can be industrial electric equipment such as flexible production line, automation line to the electrical apparatus can also be domestic appliance such as refrigerator, air conditioner, washing machine.
The motor of this embodiment is a servo motor, please refer to fig. 1, and the motor of this embodiment includes a circumferential shell 1, an end cover 2, a stator 3, a rotor 4, a rotating shaft 5, a bearing 6, and a circuit board 7, where the circumferential shell 1 is cylindrical, the circumferential shell 1 has a shell cavity penetrating along an axial direction a of the motor, the end cover 2 is fixed at one end of the circumferential shell 1 along the axial direction a, the circumferential shell 1 and the end cover 2 are parts of the shell, and the stator 3, the rotor 4, the rotating shaft 5, the bearing 6, and the circuit board 7 are all located in the shell cavity of the shell.
The week shell 1 and the end cover 2 of this embodiment adopt screw fixed connection, optionally, in other embodiments of the utility model, week shell 1 and end cover 2 are with integrated into one piece's mode fixed connection.
The circuit board 7 is located at one side of the stator 3 along the axial direction a, the stator 3 and the circuit board 7 are integrally encapsulated on the inner cylinder wall of the peripheral shell 1 by injection molding materials 8, the rotor 4 is fixedly connected with the rotating shaft 5, and the rotating shaft 5 is rotatably supported on the shell through a bearing 6.
Specifically, the stator 3 has a core 31, an insulating bobbin 32, and windings 33.
The inner peripheral wall of the peripheral shell 1 of the embodiment is provided with a runner groove 13, the runner groove 13 is an annular groove extending along the circumferential direction of the motor, the runner groove 13 faces the outer side of the circuit board 7 along the radial direction of the motor, and the circuit board 7 and the groove wall of the runner groove 13 are arranged at intervals; the runner groove 13 communicates from one side of the circuit board 7 to the other side of the circuit board 7 in the axial direction a of the motor.
The peripheral wall of the peripheral shell 1 is provided with a yielding groove 11 which penetrates along the axial direction a, the end cover 2 is provided with a mounting part 21, the mounting part 21 is provided with a mounting hole 211 which penetrates along the axial direction a, the yielding groove 11 is opposite to the mounting part 21 along the axial direction a, and the mounting hole 211 is communicated with the yielding groove 11; referring to fig. 2, the motor of the embodiment is fixedly mounted to the external structure 100 through the mounting portion 21, the external structure 100 is fitted to a side of the end cap 2 facing away from the peripheral shell 1, when the motor of the embodiment is fixedly mounted to the external structure 100, first, the screw 200 is inserted into the mounting hole 211 from the side of the relief groove 11, then, the screw 200 is screwed by using a screwdriver, the shaft portion 300 of the screwdriver passes through the relief groove 11 to be fitted to the head portion 201 of the screw 200, and the screw 200 is screwed to the external structure 100 by screwing the screwdriver, so that the motor is fixedly mounted to the external structure 100.
The receding groove 11 is provided to reserve an installation space for the head 201 of the screw 200 on one hand and provide a space for the rod 300 to pass through on the other hand, and the prior art often sets the position of the receding groove 11 and the sectional dimension of the groove cavity thereof according to the installation position of the screw 200 and the size of the head 201 thereof, so as to simultaneously ensure that the screw 200 can have a proper installation space and the rod 300 of the screwdriver can be smoothly screwed to the screw 200 through the receding groove 11.
Specifically, the sectional profile of the normal line of the end cover 2 in the axial direction a is generally square, the mounting portion 21 is located at the corner of the end cover 2, and the sectional profile of the normal line of the peripheral shell 1 in the axial direction a is flush with the sectional profile of the end cover 2 except for the relief groove 11.
Referring to fig. 1 and 2, a groove wall of the abdicating groove 11 is provided with a reinforcing part 12, the mounting part 21 and the reinforcing part 12 are arranged at an interval in the axial direction a of the motor, a section of the abdicating groove 11 where the reinforcing part 12 is arranged is a reinforcing section 112, a section of the abdicating groove 11 between the reinforcing section 112 and the mounting part 21 is a main body section 111, the reinforcing part 12 protrudes towards a groove cavity of the abdicating groove 11 relative to the groove wall of the main body section 111, the reinforcing part 12 covers the groove wall of the whole reinforcing section 112, and the reinforcing part 12 faces the radial outer side of the runner groove 13 along the radial direction of the motor; the reinforcing part 12 extends from one side of the flow channel groove 13 to the other side of the flow channel groove 13 in the axial direction a of the motor.
Specifically, the main body section 111, i.e. the section having a cross-sectional size capable of satisfying the passage of the head 201 of the screw 200 during installation, i.e. the main body section 111 at least includes the section that the head 201 of the screw 200 inevitably passes through during installation, a step is formed between the groove wall of the reinforcement section 112 and the groove wall of the main body section 111, and the part forming the step is the reinforcement portion 12, of course, in other embodiments of the present invention, the groove wall of the main body section 111 and the groove wall of the reinforcement section 112 may also be in smooth transition.
Referring to fig. 3, in the process of manufacturing the motor of this embodiment, when performing the injection molding and packaging operation on the circuit board 7 and the stator 3, the circuit board 7 and the peripheral casing 1 are sleeved on the mold 400 according to the installation state, then the injection molding tool 500 is used to inject the injection molding material 8 to the side of the circuit board 7, which is away from the stator 3, the injection molding material 8 flows to the side of the circuit board 7, which faces the stator 3, along the flow channel groove 13, and the injection molding material 8 fills both sides of the circuit board 7 along the axial direction a and the flow channel groove 13, so that the filling of the injection molding material 8 to both sides of the circuit board 7 is favorably realized, and the packaging efficiency of the stator 3 and the circuit board 7 is favorably improved.
However, the arrangement of the flow channel groove 13 also causes the wall of the peripheral shell 1 at the flow channel groove 13 to be thinned, which results in the structural strength of the peripheral shell 1 at the flow channel groove 13 to be reduced, especially, the peripheral shell 1 has a greater thinning degree in the area where the inner peripheral wall is the flow channel groove 13 and the outer peripheral wall is the receding groove 11, so that the present embodiment provides the reinforcing part 12 on the wall of the receding groove 11, which is beneficial to improving the structural strength of the peripheral shell 1 in the area where the inner peripheral wall is the flow channel groove 13 and the outer peripheral wall is the receding groove 11; also, while the present embodiment provides the reinforcement 12 resulting in a smaller cavity cross-sectional area of the reinforcement section 112 than the body section 111, on the one hand, because the reinforcing part 12 and the mounting part 21 are arranged at intervals, the reinforcing part 12 does not occupy the cavity space of the main body section 111, does not cause the reduction of the cavity sectional area of the main body part, does not affect the mounting space of the head part 201 of the screw 200, does not affect the occupation requirement of the head part 201 of the screw 200 on the cavity space, and on the other hand, since the radial dimension of the screwdriver shank 300 tends to be smaller than the radial dimension of the head 201 of the screw 200, for example the circumscribed circular diameter of the screwdriver's shaft 300 tends to be smaller than the diameter of the head 201 of the screw 200, therefore, after the reinforcing part 12 occupies part of the cavity space of the reinforcing section 112, the present embodiment can still satisfy the requirement that the rod part 300 of the screwdriver passes through, and can still smoothly realize the mounting and dismounting operations of the motor.
In addition, the reinforcing part 12 of this embodiment is only located on the cell wall of the recess 11 of stepping down to reinforcing part 12 is protruding in the vallecular cavity of the recess 11 of stepping down, and the setting of reinforcing part 12 can not lead to the motor to the increase of taking up of installation space, is favorable to the miniaturization of motor, is favorable to saving the installation space of motor.
Specifically, the circuit board 7 is located on the side of the stator 3 facing away from the mounting portion 21 in the axial direction a of the motor; this is advantageous to ensure that the reinforcement portion 12 is at a greater distance from the mounting portion 21, and thus that the placement of the reinforcement portion 12 does not affect the space requirements of the head 201 of the screw 200 for the cavity.
The reinforcing portion 12 of this embodiment is the boss that covers the slot wall of the reinforcing segment 112 as a whole and protrudes from the cavity space of the abdicating groove 11, alternatively, in other embodiments of the present invention, please refer to fig. 4, the reinforcing portion may also be reinforcing ribs 12 ', the number of the reinforcing ribs 12 ' is at least two, each reinforcing rib 12 ' is distributed along the slot wall interval of the abdicating groove 11 ', and the distribution direction of each reinforcing rib 12 ' is perpendicular to the axial direction a.
Alternatively, in other embodiments of the present invention, the reinforcement portion 12 may be provided at other positions on the outer peripheral wall of the peripheral shell 1, and the reinforcement portion 12 is directly opposite to the radial outer side of the runner groove 13 in the radial direction of the motor; the reinforcing part 12 extends from one side of the flow channel groove 13 to the other side of the flow channel groove 13 in the axial direction a of the motor; therefore, the structural strength of the peripheral shell 1 at the position of the flow channel groove 13 is more favorably enhanced, the size of the peripheral shell 1 is not required to be integrally increased, and the miniaturization of the motor is facilitated; of course, this solution would lead to an increase in the outer profile dimension of the peripheral shell 1 in the partial section where the runner groove 13 is provided, and an increase in the maximum radial dimension of the peripheral shell 1, and an increase in the occupation of the installation space by the motor, and therefore, the solution of the present embodiment in which the reinforcement portion 12 is provided only on the groove wall of the abdicating groove 11 is preferably adopted.
Alternatively, in other embodiments of the present invention, the runner groove 13 may be divided into two or more, and the runner grooves 13 are distributed at intervals along the circumferential direction of the motor, which may, of course, result in a portion of the space of the circuit board 7 near the stator 3 that cannot be completely filled with the injection molding material 8, and thus the runner groove 13 is preferably provided as an annular groove extending along the circumferential direction of the motor.
In this embodiment, radial, axial, and circumferential are all compared to the electric machine.
Finally, it should be emphasized that the above-described embodiments are merely preferred examples of the present invention, and are not intended to limit the invention, as those skilled in the art will appreciate that various changes and modifications may be made, and any and all modifications, equivalents, and improvements made, while remaining within the spirit and principles of the present invention, are intended to be included within the scope of the present invention.
Claims (11)
1. The motor comprises a shell, a stator and a circuit board, wherein the stator and the circuit board are both arranged in a shell cavity of the shell, the circuit board is positioned on one side of the stator along the axial direction of the motor, and the stator and the circuit board are integrally packaged by injection molding materials;
the method is characterized in that:
the inner peripheral wall of the shell is provided with a runner groove, the runner groove is filled with the injection molding material, the runner groove faces the outer side of the circuit board along the radial direction of the motor, and the circuit board and the groove wall of the runner groove are arranged at intervals;
the runner groove is communicated from one side of the circuit board to the other side of the circuit board along the axial direction;
the outer peripheral wall of the housing has a reinforcing portion projecting outward, the reinforcing portion being directed toward the outer side of the flow channel groove in the radial direction.
2. The electric machine of claim 1, wherein:
the periphery wall of the shell is provided with a yielding groove, the yielding groove extends in the axial direction, and the groove wall of the yielding groove is provided with the reinforcing part.
3. The electric machine of claim 2, wherein:
the reinforcing part is only arranged on the groove wall of the yielding groove, and the reinforcing part is protruded into the groove cavity of the yielding groove.
4. The electric machine of claim 2, wherein:
the edge of casing axial one end has the installation department, follows the axial, the recess of stepping down one end with the installation department is just right, the recess of stepping down the other end link up the casing, the enhancement portion with the installation department interval sets up.
5. The electric machine of claim 4, wherein:
the installation department has the edge the mounting hole that the axial is link up, the mounting hole with the recess intercommunication of stepping down.
6. The electric machine of claim 4, wherein:
along the axial, the circuit board is located one side of stator is kept away from the installation department.
7. The electric machine of any of claims 2 to 6, wherein:
the reinforcing part includes the edge axially extended strengthening rib, the quantity of strengthening rib is two at least, each the strengthening rib is followed the cell wall interval distribution of the recess of stepping down, each the distribution direction perpendicular to of strengthening rib the axial.
8. The electric machine of any of claims 2 to 6, wherein:
along the axial direction, the section of the abdicating groove provided with the reinforcing part is a reinforcing section;
the reinforcement includes a boss integrally covering a groove wall of the reinforcement section.
9. The electric machine according to any of claims 1 to 6, characterized in that:
the reinforcing portion extends from one side of the runner groove to the other side of the runner groove in the axial direction.
10. The electric machine according to any of claims 1 to 6, characterized in that:
the number of the runner grooves is at least two, and the runner grooves are distributed at intervals along the circumferential direction of the motor; or the runner groove is an annular groove extending along the circumferential direction of the motor.
11. An electrical appliance, characterized by:
comprising an electric machine as claimed in any of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120953356.2U CN214480146U (en) | 2021-05-06 | 2021-05-06 | Motor and electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120953356.2U CN214480146U (en) | 2021-05-06 | 2021-05-06 | Motor and electric appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214480146U true CN214480146U (en) | 2021-10-22 |
Family
ID=78180988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120953356.2U Active CN214480146U (en) | 2021-05-06 | 2021-05-06 | Motor and electric appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214480146U (en) |
-
2021
- 2021-05-06 CN CN202120953356.2U patent/CN214480146U/en active Active
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