CN214154279U

CN214154279U - Motor end cover for shielding electromagnetism

Info

Publication number: CN214154279U
Application number: CN202022692179.5U
Authority: CN
Inventors: 陈晨
Original assignee: Yuyao Aosheng Motor Manufacturing Co ltd
Current assignee: Yuyao Aosheng Motor Manufacturing Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-09-07
Anticipated expiration: 2030-11-18

Abstract

The utility model relates to a motor end cover of shielding electromagnetism, the field of the motor technology is related to, it includes the support frame and sets up the brush on the support frame, brush fixed connection is on the support frame, still be provided with the inductance on the support frame, the inductance includes the coil and wears to establish the magnet in the coil, the tip and the brush electricity of coil are connected, the one end that the brush was kept away from to the coil is provided with a electric capacity, and the electric capacity keeps away from the one end ground connection of inductance, be provided with the guide vane with the power switch-on between coil and the electric capacity, and the guide vane is connected with coil and electric capacity electricity respectively. The utility model provides a be connected with electric capacity and inductance on the conducting strip that is used for connecting the power on the motor end cover, electric capacity and inductance can filter the electromagnetic interference that the motor during operation brush produced to make the motor reduce to some extent its influence with electrical apparatus production on every side.

Description

Motor end cover for shielding electromagnetism

Technical Field

The application relates to the field of motor technology, in particular to a motor end cover capable of shielding electromagnetism.

Background

The motor end cover is a part for supporting the electric brushes of the motor, the two electric brushes of the motor are respectively arranged on the motor end cover, and the rotor is positioned between the two electric brushes.

At present, when a common motor end cover works in a motor, a signal at an electric brush is coupled to other electric appliances at a certain probability, so that the electric brush generates electromagnetic interference on the electric appliances around the motor, and normal use of the other electric appliances around the motor is further influenced.

SUMMERY OF THE UTILITY MODEL

In order to reduce the electromagnetic interference of brushes on the motor end cover to the external world, the application provides a motor end cover for shielding electromagnetism.

The application provides a motor end cover of shielding electromagnetism adopts following technical scheme:

the utility model provides a motor end cover of shielding electromagnetism, includes the support frame and sets up the brush on the support frame, brush fixed connection is on the support frame, still be provided with the inductance on the support frame, the inductance includes coil and the magnet of wearing to establish in the coil, the tip and the brush electricity of coil are connected, the one end that the brush was kept away from to the coil is provided with a electric capacity, and the electric capacity keeps away from the one end ground connection of inductance, be provided with between coil and the electric capacity with the guide piece of switch-on, and the guide piece is connected with coil and electric capacity electricity respectively.

Through adopting above-mentioned technical scheme, be located the guide card that is used for linking to each other with the power on the support frame and be connected with the inductance to make the inductance can filter the interference of motor during operation. The conducting sheet is also connected with a capacitor, and the capacitor is grounded, so that the capacitor can further shield interference signals generated when the motor works. The capacitor and the inductor can shield electromagnetic interference generated at the position of the electric brush when the motor works, so that the influence of the electric brush positioned on the end cover of the motor on electric appliances in the surrounding environment when the motor works is reduced.

Optionally, the support frame is provided with the mounting groove along the tip of its axial one end, and the centre of a circle symmetrical arrangement of mounting groove about the support frame has two, and the mounting groove is provided with respectively along two tip of self length direction with mounting groove looks vertically a portion, and the brush is close to the one end of support frame and is provided with one and mounting groove and a portion matched with connection piece, and the connection piece inlays to be established in the mounting groove.

Through adopting above-mentioned technical scheme, when the rotor of motor rotated, the support frame can produce the vibration to make the brush can take place the displacement because of vibrations and drop even from the support frame, and then lead to the unable use of motor. The cooperation between the mounting groove of connection piece and support frame makes the brush by fixed mounting on the support frame to the risk that makes the brush because of the vibrations that the motor during operation produced and take place the displacement between and drop from the support frame reduces to some extent.

Optionally, the electric brush includes brush head and brush yoke, and brush head fixed connection keeps away from the one end of connection piece at the brush yoke, thereby the brush yoke is close to the crooked setting of the one end of connection piece and makes the brush yoke be close to the one end of connection piece and form an butt portion, and the one end that the connection piece is close to the electric brush is provided with a kink, the connection piece links to each other with the brush yoke and the arc surface looks butt of butt portion evagination and kink indent.

Through adopting above-mentioned technical scheme, when the rotor of motor was by the centre gripping between the brush head of two brushes, the butt effect of kink to the brush yoke makes the brush yoke crooked to the direction of being close to the rotor to make the brush head keep its clamping action to the rotor, and then guaranteed the electric conduction state between rotor and the brush head, the motor also can keep steady operation consequently.

Optionally, the end face of one end, close to the mounting groove, of the support frame is provided with two capacitance cavities, the two capacitance cavities are arranged in axial symmetry with respect to the support frame, and the capacitance is embedded in the capacitance cavities.

Through adopting above-mentioned technical scheme, the electric capacity is located the electric capacity intracavity of support frame to make the electric capacity that is located the electric capacity intracavity of support frame can be protected in the electric capacity intracavity of support frame. Therefore, the protective effect of the capacitance cavity on the capacitance is realized by the capacitance cavity of the support frame, so that the probability of damage caused by the influence of external factors on the capacitance is reduced in the practical process of the motor.

Optionally, one end of the support frame, which is close to the mounting groove, is provided with two openings communicated with the capacitance cavity, two openings are arranged in axial symmetry with respect to the support frame, and a pin at one end of the capacitance, which is far away from the inductance and matched with the capacitance cavity, penetrates out of the capacitance cavity through the openings of the support frame and is grounded.

Through adopting above-mentioned technical scheme, electric capacity when ground connection is connected, the one end that the inductance was kept away from to the electric capacity is worn out via the opening department of support frame to make the one end that the inductance was kept away from to the electric capacity can not occupy unnecessary space on the support frame, and the wall that is located the opening of support frame plays the restriction effect to the one end that the inductance was kept away from to the electric capacity, thereby makes the one end that the inductance was kept away from to the electric capacity can not take place great displacement in the use.

Optionally, one end of the mounting groove close to the brush holder is provided with an opening communicated with an inner cavity of the support frame, the opening enables the support frame and one end of the mounting groove close to the brush holder to form a baffle, a support plate used for supporting the inductor is arranged on the support frame, the cylindrical surface of the coil is abutted to the support plate, one end of the support plate extending along the length of the support plate is fixedly connected to the baffle, and one end of the support plate far away from the baffle is connected to the support frame.

Through adopting above-mentioned technical scheme, when the motor during operation, the motor can produce vibrations, and the vibrations of motor can make the component on the support frame produce not hard up. The backup pad supports the inductance to make the inductance when the motor work, the inductance produces between the vibrations of motor and the support frame not hard up and takes place relative displacement and move the risk that drops on the support frame even to some extent and reduce. And the baffle is connected between with backup pad and the support frame to make the joint strength between backup pad and the support frame strengthen to some extent.

Optionally, a notch penetrating through the baffle is formed in the baffle along the thickness extending direction of the baffle.

Through adopting above-mentioned technical scheme, when the motor in the use, the magnet of inductance can be because of generating heat and produce the phenomenon of thermal expansion because of having seted up a notch on the baffle to make when the magnet of inductance when taking place axial elongation because of thermal expansion, the baffle can not interfere the magnet of inductance, thereby make the baffle can enough strengthen the joint strength between backup pad and the support frame, can not influence the normal use of electric capacity again.

Optionally, one end of the support frame close to the mounting groove is provided with two slots, the two slots are arranged in axial symmetry with respect to the support frame (1), a through hole is formed in the slot bottom of the slot of the support frame, the guide piece comprises a connecting portion and an inserting portion, the width of the connecting portion is larger than that of the inserting portion, the connecting portion is embedded in the slot of the support frame, and the inserting portion penetrates out of the other side of the support frame through the through hole.

Through adopting above-mentioned technical scheme, the guide vane is inserted and is established in the slot of support frame to make the support frame can protect the guide vane, the guide vane receives the protection of support frame and makes it reduce to some extent because of receiving the risk that external factors influence takes place the damage. The inserting part penetrates through the through hole of the support frame and then is connected with the power supply, and the connecting part with wider width cannot penetrate out of the through hole, so that the risk that the guide sheet falls off from the support frame due to the fact that the guide sheet moves towards the direction of the connecting part when the guide sheet is connected with the power supply is reduced.

Optionally, one end of the connecting portion, which is close to the insertion portion, is provided with a connecting pin, a connecting hole through which the connecting pin passes is formed in a slot bottom of the slot of the support frame, the connecting pin penetrates out from the other end of the support frame through the connecting hole, and one end of the connecting pin, which penetrates through the connecting hole, is arranged in a bending manner.

By adopting the technical scheme, after the guide vane is inserted into the slot, the guide vane cannot move towards one side connected with the motor when the guide vane is inserted into the slot due to the width difference between the connecting part and the inserting part. After the connection foot of guide vane passed the connecting hole of support frame and crooked, crooked connection foot made the butt on one side of the support frame back to the slot to make the guide vane unable normal direction keep away from its direction of the one end that links to each other with the motor and move, and then make the guide vane by fixed connection on the support frame, the risk of taking place the separation between guide vane and the support frame further reduces.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the capacitor and the inductor can filter electromagnetic interference generated by an electric brush when the motor works, so that the influence of the motor on surrounding electric appliances is reduced;

2. one end of the capacitor, which is far away from the inductor, penetrates out of the notch of the support frame and is connected with the ground, so that the capacitor cannot occupy the space on the redundant support frame in the grounding process.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment.

Fig. 2 is a schematic structural diagram of the support frame in the embodiment.

Fig. 3 is a schematic diagram for showing a through hole and a connection hole in the present embodiment.

Fig. 4 is an exploded view of the brush in this embodiment.

Fig. 5 is a schematic structural diagram of the guide vane in the present embodiment.

Fig. 6 is a schematic structural diagram of the capacitor in this embodiment.

Description of reference numerals: 1. a support frame; 11. mounting grooves; 111. a branch portion; 12. a support plate; 13. a baffle plate; 131. a notch; 14. a slot; 15. a through hole; 16. connecting holes; 17. a capacitor chamber; 18. opening the gap; 2. an electric brush; 21. a brush head; 22. a brush holder; 221. a card interface; 222. a clamping and connecting plate; 223. an abutting portion; 23. connecting sheets; 231. a bending section; 3. an inductance; 31. a coil; 32. a magnet; 4. a capacitor; 41. a pin; 5. a guide plate; 51. a connecting portion; 511. a wiring groove; 52. a plug-in part; 53. a connecting pin.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a motor end cover for shielding electromagnetism. Referring to fig. 1, an electromagnetic shielding motor end cap includes a support frame 1, a brush 2, an inductor 3, a capacitor 4, and a guide strip 5. The guide sheet 5 is used for being connected with a power supply of the motor, the guide sheet 5 is electrically connected with the capacitor 4 and is grounded through the capacitor 4, the guide sheet 5 is also electrically connected with the capacitor 4, and the electric brush 2 is electrically connected to the guide sheet 5. The power supply transmits electrical energy to the brushes 2 via the guide tabs 5 so that the brushes 2 can drive the rotor of the motor to rotate. And the capacitor 4 and the inductor 3 can filter out electromagnetic interference generated by the electric brush 2 in the working process of the motor, so that the influence of the motor on surrounding electric appliances in the working process is reduced.

As shown in fig. 2 and 3, the supporting frame 1 is an annular structure, and one end of the supporting frame 1 along the axial direction is provided with two mounting grooves 11, and the mounting grooves 11 are symmetrically arranged on two sides of the supporting frame 1 about the center of the supporting frame 1. The mounting groove 11 has been seted up respectively along its length extending direction's both ends and has been seted up respectively with mounting groove 11 looks vertically a portion 111, and the opening that supplies mounting groove 11 and support frame 1's inner chamber to be linked together is seted up to the one end that just is located mounting groove 11 and is close to brush 2 on the support frame 11, and the opening makes on the support frame and is located mounting groove 11 and forms a baffle 13 near the one end of brush yoke 22. A supporting plate 12 is integrally arranged on the wall surface of one side, close to the circle center of the mounting frame, of the mounting groove 11 of the mounting frame, one side, close to the electric brush 2, of the supporting plate 12 in the length extending direction of the supporting plate is welded on the baffle 13, and one end, far away from the baffle 13, of the supporting plate 12 is integrally arranged on the supporting frame 1.

The baffle 13 is perpendicular to the support plate 12, and a notch 131 is formed in the baffle 13 along the thickness extending direction of the baffle 13. The surface of the support frame 1 provided with the mounting groove 11 is further provided with two slots 14, the number of the slots 14 is two, the slots 14 are symmetrically arranged about the circle center of the support frame 1, the slots 14 and the mounting groove 11 are alternately arranged around the circle center of the support frame 1, a through hole 15 is formed in the bottom of the slot 14 of the support frame 1, and two connecting holes 16 are formed in two sides of the through hole 15 respectively.

As shown in fig. 1 and 4, the number of the brushes 2 is two, and the brushes 2 include a brush head 21 and a brush holder 22, a clamping interface 221 for inserting the brush head 21 is provided at an end portion of the brush holder 22 close to the brush holder 22, and a clamping plate 222 is further provided at the clamping interface 221 of the brush holder 22 integrally with the brush holder 22, the clamping plates 222 are symmetrically arranged at two sides of the clamping interface 221 of the brush holder 22, the brush head 21 is inserted into the clamping interface 221 of the brush holder 22, and the brush head 21 is clamped by the clamping plate 222, so that the brush head 21 is fixedly mounted on the brush holder 22. The end of the brush holder 22 away from the brush head 21 is a bent structure, and the bent portion of the brush holder 22 is defined as an abutting portion 223. The end of the brush holder 22 away from the brush head 21 is welded with a connecting piece 23 matching with the mounting groove 11 and the branch portion 111, and the end of the connecting piece 23 close to the brush holder 22 is of a bent structure, so that a bent portion 231 is formed at the end of the connecting piece 23 close to the brush holder. The connecting piece 23 and the abutting portion 223 of the brush holder 22 are embedded in the mounting groove 11 of the support frame 1, the connecting piece 23 is connected with the brush holder 22, the convex arc surface of the abutting portion 223 abuts against the concave arc surface of the bending portion 231, and the surfaces of the brush heads 21 of the two brushes 2, which face away from the brush holder 22, are opposite.

As shown in fig. 1 and 2, the inductor 3 is located on the support plate 12 of the support frame 1, the inductor 3 includes a coil 31 and a magnet 32, the magnet 32 is inserted into the coil 31, an outer cylindrical surface of the coil 31 abuts against the support plate 12, one end of the coil 31 close to the brush holder 22 is welded to the connecting piece 23 of the brush 2, and one end of the coil 31 far from the connecting piece 23 is inserted into the slot 14 of the support frame 1.

As shown in fig. 1 and 5, the guide vane 5 includes a connection portion 51 and a plug portion 52, the width of the plug portion 52 of the guide vane 5 is smaller than the width of the connection portion 51, and a connection leg 53 is integrally provided at one end of the connection portion 51 close to the plug portion 52 and corresponding to the connection hole 16 of the support frame 1. The inserting part 52 of the guide vane 5 is inserted into the through hole 15 of the support frame 1, and the inserting part 52 penetrates out from the other end of the support frame 1. At the same time, the connecting leg 53 of the guide vane 5 also passes through the connecting hole 16 of the support frame 1, and the user can bend the connecting leg 53 through one end of the connecting hole 16, so that the guide vane 5 is fixed on the support frame 1. The connecting portion 51 has wiring grooves 511 formed on both sides in the width extending direction thereof, one end of the coil 31 remote from the connecting piece 23 passes through the wiring grooves 511, and the cylindrical surface of the coil 31 abuts against the wall of the wiring groove 511 of the connecting portion 51.

As shown in fig. 1 and fig. 6, two ends of the capacitor 4 are welded with two pins 41, the number of the pins 41 is two, the pins 41 are disposed on two sides of the body of the capacitor 4, one of the pins 41 of the capacitor 4 is welded on the connecting portion 51 of the conductive piece 5, the supporting frame 1 is disposed on one side of the slot 14 away from the inductor 3 and is provided with a capacitor cavity 17, and the capacitor 4 is embedded in the capacitor cavity 17. One end of the support frame 1 close to the mounting groove 11 is also provided with a gap 18 communicated with the capacitance cavity 17, and the other pin 41 of the capacitor 4 penetrates out of the gap 18 of the support frame 1 and is connected with the ground. The electric brush 2 is connected with the guide sheet 5 through the capacitor 4, and the guide sheet 5 is positioned between the inductor 3 and the capacitor 4, so that the space positioned on the support frame 1 can be fully utilized, and the interference among all elements can not occur.

The implementation principle of the electromagnetic shielding motor end cover of the embodiment of the application is as follows: brush 2 is connected with inductance 3, and the one end that inductance 3 keeps away from brush 2 is connected with the conducting strip 5 that is used for the switch on power, and the pin 41 of electric capacity 4 is connected on conducting strip 5, and the one end that electric capacity 4 keeps away from conducting strip 5 is ground connection. The inductor 3 and the capacitor 4 filter electromagnetic interference generated by the electric brush 2 when the motor works, so that the electric interference generated by the motor when the motor works is shielded, and the interference effect of the motor on surrounding electric appliances is reduced when the motor works.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a motor end cover of shielding electromagnetism which characterized in that: comprises a support frame (1) and brushes (2) arranged on the support frame (1), wherein the brushes (2) are fixedly connected on the support frame (1), an inductor (3) is also arranged on the support frame (1), the inductor (3) comprises a coil (31) and a magnet (32) arranged in the coil (31) in a penetrating way, the end part of the coil (31) is electrically connected with the brushes (2), one end of the coil (31) far away from the brushes (2) is provided with a capacitor (4), one end of the capacitor (4) far away from the inductor (3) is grounded, a guide sheet (5) communicated with a power supply is arranged between the coil (31) and the capacitor (4), the guide sheet (5) is respectively and electrically connected with the coil (31) and the capacitor (4), a mounting groove (11) is arranged on the end part of the support frame (1) along one axial end thereof, and the two mounting grooves (11) are symmetrically arranged about the circle center of the support frame (1), two end parts of the installation groove (11) along the length direction are respectively provided with a supporting part (111) vertical to the installation groove (11), one end of the electric brush (2) close to the support frame (1) is provided with a connecting sheet (23) matched with the installation groove (11) and the supporting part (111), and the connecting sheet (23) is embedded in the installation groove (11).

2. An electromagnetic shielding motor end cap as set forth in claim 1, wherein: brush (2) are including brush head (21) and brush yoke (22), brush head (21) fixed connection is in the one end that connection piece (23) were kept away from in brush yoke (22), thereby brush yoke (22) are close to the crooked setting of one end of connection piece (23) and make brush yoke (22) be close to the one end of connection piece (23) and form an butt portion (223), and connection piece (23) are close to the one end of brush (2) and are provided with a kink (231), connection piece (23) link to each other with brush yoke (22) and the arc surface looks butt of butt portion (223) evagination and kink (231) indent.

3. An electromagnetic shielding motor end cap as set forth in claim 1, wherein: the capacitor cavity (17) is arranged on the end face of one end, close to the mounting groove (11), of the support frame (1), two capacitor cavities (17) are arranged in axial symmetry relative to the support frame (1), and the capacitors (4) are embedded in the capacitor cavities (17).

4. An electromagnetic shielding motor end cap as set forth in claim 3, wherein: one end of the support frame (1) close to the mounting groove (11) is provided with two notches (18) communicated with the capacitance cavity (17), the two notches (18) are arranged in axial symmetry relative to the support frame (1), and a pin (41) of one end of the capacitor (4) matched with the capacitance cavity (17), which is far away from the inductor (3), penetrates out of the capacitance cavity (17) through the notches (18) of the support frame (1) and is grounded.

5. An electromagnetic shielding motor end cap as set forth in claim 1, wherein: one end that mounting groove (11) are close to brush yoke (22) is provided with one and the communicating opening of inner chamber of support frame (1), the opening makes on the support frame and is located mounting groove (11) and forms a baffle (13) near the one end of brush yoke (22), be provided with one backup pad (12) that are used for supporting inductance (3) on support frame (1), and the cylinder butt of coil (31) is on backup pad (12), one end fixed connection that backup pad (12) extend along its length is on baffle (13), the one end that baffle (13) were kept away from in backup pad (12) is connected on support frame (1).

6. An electromagnetic shielding motor end cap as set forth in claim 5, wherein: and a notch (131) penetrating through the baffle (13) is formed in the baffle (13) along the thickness extending direction of the baffle (13).

7. An electromagnetic shielding motor end cap as set forth in claim 1, wherein: the utility model discloses a support frame, including support frame (1), be located two on support frame (1) be provided with slot (14) between mounting groove (11), axial symmetry about support frame (1) has been arranged in slot (14) has two, a through-hole (15) have been seted up in the tank bottom department that just is located slot (14) on support frame (1), guide card (5) are including connecting portion (51) and grafting portion (52), and the width of connecting portion (51) is greater than the width of grafting portion (52), connecting portion (51) are inlayed and are established in slot (14) of support frame (1), grafting portion (52) are worn out from the opposite side of support frame (1) via through-hole (15).

8. An electromagnetic shielding motor end cap as claimed in claim 7, wherein: one end, close to the inserting part (52), of the connecting part (51) is provided with a connecting pin (53), a connecting hole (16) for the connecting pin (53) to penetrate through is formed in the groove bottom of the inserting groove (14) of the support frame (1), the connecting pin (53) penetrates out of the other side of the support frame (1) through the connecting hole (16), and one end, through which the connecting pin (53) penetrates through the connecting hole (16), of the connecting part is arranged in a bending mode.