CN218678733U - Brushless motor - Google Patents

Abstract

The utility model provides a brushless motor, including casing, rotor assembly, stator assembly, bus dish and PIN needle. Wherein, it is equipped with open cavity to construct one end in the casing, and rotor assembly is rotatable locates in the cavity, and stator assembly sets firmly in the cavity to outside the rotor assembly was located to the cover, the generating line dish was installed in stator assembly's the open one end of orientation, and the generating line dish has a plurality of electrically conductive pieces that extend towards open direction, and there are a plurality of PIN needles with electrically conductive piece one-to-one, and the PIN needle that corresponds is connected with electrically conductive piece, and the middle part along self length direction of each PIN needle all overlaps and is equipped with the injection molding. The utility model discloses a brushless motor, its bus drum have towards the electrically conductive piece that uncovered direction extends to be equipped with a plurality of PIN needles and electrically conductive piece one-to-one and link to each other, when the pairing hole of PIN needle and controller is connected, this PIN needle and electrically conductive connection site flexible deformation of piece, thereby be favorable to eliminating PIN needle and pairing hole installation tolerance, and then improve the installation accuracy of PIN needle and controller.

Description

Brushless motor

Technical Field

The utility model relates to the technical field of motors, in particular to brushless motor.

Background

Unlike a conventional vacuum booster, the boosting of the electro-hydraulic brake system is derived from the output torque of a brushless motor being converted into an axial thrust by a transmission mechanism. Generally, the brushless motor of the electro-hydraulic integrated system is divided into a hollow shaft and a solid shaft, but the hollow shaft motor is mainly used as the main stream.

At present, 3-phase PIN of the hollow shaft motor needs to penetrate through the oil way valve body to be connected with the controller, and the length of a PIN needle needs to be increased under the condition that the position of the stator is separated from the position of a power plug. When the length of PIN needle becomes long, the front end position of PIN needle becomes unstable, leads to motor PIN whole position degree, straightness tolerance is great that hangs down, leads to the PIN needle to pass the valve body easily and be connected with the controller accurately.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to a brushless motor capable of improving assembling precision with a controller.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a brushless electric machine comprising:

the device comprises a shell, a first fixing device and a second fixing device, wherein a cavity with an opening at one end is formed in the shell;

the rotor assembly is rotatably arranged in the cavity;

the stator assembly is fixedly arranged in the cavity and sleeved outside the rotor assembly;

the bus coil is arranged at one end of the stator assembly, which faces the opening, and is provided with a plurality of conductive pieces extending towards the opening direction;

the PIN needles correspond to the conductive pieces one by one, and the corresponding PIN needles are connected with the conductive pieces; and the middle part of each PIN needle along the length direction of the PIN needle is sleeved with an injection molding piece.

Furthermore, each injection molding is all overlapped and is equipped with the rubber circle, the rubber circle is located the middle part of injection molding along the length direction of PIN needle.

Further, the conductive pieces are conductive PINs, and the conductive PINs and the PIN PINs are in one-to-one correspondence.

Further, relative to the end of the shell body provided with the opening, the other end of the shell body is provided with a bottom wall formed with a mounting hole; the rotor assembly is provided with an insertion end inserted in the bearing, and a first sealing ring for sealing a gap between the bearing and the insertion end is arranged between the bearing and the insertion end.

Furthermore, the mounting hole is a through hole with one end communicated with the cavity; the two ends of the bearing are respectively provided with a first limiting part and a second limiting part so as to limit the installation position of the bearing in the through hole, and the first limiting part is arranged at one end of the bearing, which faces towards the cavity.

Furthermore, the second limiting part comprises a retainer ring which is arranged at the end part of the bearing in a retaining way, and the retainer ring is connected with the bottom wall; an end cover is arranged outside the retainer ring, and the end cover is arranged on the bottom wall and used for plugging the mounting hole.

Further, a first groove is formed in the outer side of the bottom wall; the end cover comprises an end cover main body and a clamping part arranged on the edge of the end cover main body; the clamping portion is clamped in the first groove, and the end cover is installed on the bottom wall.

Furthermore, a first step surface and a second step surface which are arranged in a step shape from the edge to the center are arranged on the outer side of the bottom wall; the first groove is formed on the first step surface; the end cover main body is abutted against the second step surface.

Furthermore, the clamping part comprises a first flanging, a second flanging and a third flanging which are connected in sequence; the other end of the first flanging is connected with the end cover main body relative to one end of the first flanging, which is connected with the second flanging; the second flanging extends from the first flanging to the direction far away from the end cover main body, and the third flanging and the first flanging are located on the same side of the second flanging.

Furthermore, a second groove is formed in the second step surface, and a second sealing ring is embedded in the second groove to seal a gap between the end cover main body and the second step surface.

Compared with the prior art, the utility model discloses following advantage has:

brushless motor, its bus drum have towards the electrically conductive piece that uncovered direction extends to be equipped with a plurality of PIN needles and electrically conductive piece one-to-one and link to each other, when the pairing hole connection of PIN needle and controller, this PIN needle and electrically conductive connection site flexible deformation of piece, thereby be favorable to eliminating PIN needle and pairing hole installation tolerance, and then improve the installation accuracy of PIN needle and controller.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a cross-sectional view of a brushless motor according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a portion of the structure of FIG. 1;

fig. 3 is a schematic structural diagram of an end cap according to an embodiment of the present invention.

Description of reference numerals:

1. a housing; 101. a cavity; 102. opening the mouth; 103. a bottom wall; 1031. a through hole; 1032. a first limiting part; 1033. a first step surface; 1034. a first groove; 1035. a second step surface; 1036. a second groove; 104. an end cap; 1041. an end cap body; 1042. a first flanging; 1043. second flanging; 1044. third flanging;

2. a stator assembly; 3. a rotor assembly; 301. a hollow shaft; 302. a rotor; 303. a first seal ring; 4. a bus disc; 401. a conductive pin; 5. a PIN needle; 501. an injection molded part; 502. a rubber ring; 6. a bearing; 7. a retainer ring; 8. a second seal ring; 9. an outer member.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless expressly limited otherwise. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The present embodiment relates to a brushless motor, as shown in fig. 1, which integrally comprises a housing 1, a rotor assembly 3, a stator assembly 2, a bus bar disk 4 and a plurality of PIN PINs 5.

Wherein, a cavity 101 with an opening 102 at one end is configured in the housing 1. The rotor assembly 3 is rotatably disposed in the cavity 101. The stator assembly 2 is fixedly arranged in the cavity 101 and sleeved outside the rotor assembly 3. The bus bar disc 4 is installed at one end of the stator assembly 2 facing the opening 102, and the bus bar disc 4 is provided with a plurality of conductive pieces extending towards the opening 102. A plurality of PIN needles 5, electrically conductive piece one-to-one, and the PIN needle 5 that corresponds is connected with electrically conductive piece, and the middle part along self length direction of each PIN needle 5 all overlaps and is equipped with injection molding 501.

The brushless motor of this embodiment, its bus drum 4 has the electrically conductive piece that extends towards uncovered 102 direction to be equipped with a plurality of PIN needles 5 and electrically conductive piece one-to-one and link to each other, when the hole connection is mated to PIN needle 5 and controller, this PIN needle 5 and the connection site flexible deformation who electrically conducts, thereby be favorable to eliminating PIN needle 5 and mate the hole installation tolerance, and then improve the installation accuracy of PIN needle 5 and controller.

Based on the above general description of the structure, an exemplary structure of the brushless motor of the present embodiment is shown in fig. 1, in which the cross section of the housing 1 is substantially U-shaped, and the top opening 102 of the housing 1 is provided. The other end of the housing 1 is provided with a bottom wall 103 formed with a mounting hole, opposite to the top end of the housing 1 provided with the opening 102.

In addition, the rotor assembly 3 includes a hollow shaft 301 and a rotor 302 disposed on an outer wall of the hollow shaft 301, and a bottom of the hollow shaft 301 has an insertion end inserted into the bearing 6, and the insertion end is inserted into the mounting hole and can rotate relative to the mounting hole. And external component 9 is connected in hollow shaft 301, and the port that is located the grafting end on hollow shaft 301 is equipped with the via hole, and this via hole can make things convenient for the ball in external component 9 to insert and fix, and realizes through the rotation of hollow shaft 301 through the ball rotation in driving external component 9, and then drives piston mechanism reciprocating motion.

The stator assembly 2 is disposed on the inner wall of the housing 1 corresponding to the rotor 302 on the hollow shaft 301, and the rotor 302 and the hollow shaft 301 are driven to rotate by electromagnetic induction between the stator and the rotor 302. The bus bar disc 4 is disposed at one end of the stator assembly 2 facing the opening 102, and as a preferred embodiment, the conductive members disposed on the bus bar disc 4 are conductive PINs 401, and the conductive PINs 401 and the PIN PINs 5 are three groups in one-to-one correspondence. This conductive PIN 401 and PIN needle 5 welding structure as an organic whole, and can produce bending deformation, in the assembling process, be favorable to reducing PIN needle 5 and the controller and mate the installation error between the hole.

In a preferred embodiment, injection-molded parts 501 fitted over the PIN are each fitted with a rubber ring 502, and preferably, as shown in fig. 1, the rubber ring 502 is located in the middle of the injection-molded parts 501 in the length direction of the PIN 5. This rubber circle 502 and the aforesaid trace interference fit of mating hole can lead and just insert the PIN needle 5 of mating hole after, guarantees that PIN needle 5 and controller mate the hole and just set up. Besides, the rubber ring 502 may be disposed at other positions of the injection molding 501, which may be set according to practical situations and is not limited in particular.

In addition, as a preferred embodiment, referring to fig. 1, the mounting hole is a through hole 1031 with one end communicating with the cavity 101, a bearing 6 is mounted in the mounting hole near the through hole 1031, and the insertion end passes through the through hole 1031 to be matched with the bearing 6, so as to facilitate the rotation of the hollow shaft 301 relative to the housing 1.

Wherein, the bearing 6 is provided with a first limit part 1032 and a second limit part at two ends thereof, respectively, to limit the mounting position of the bearing 6 and the through hole 1031. As a preferred embodiment, referring to fig. 1, the first limiting portion 1032 is provided at an end of the bearing 6 facing the cavity 101. Specifically, the through hole 1031 is necked down at a position communicated with the cavity 101, so that the through hole 1031 is overall in an inverted L shape, and the first limiting portion 1032 is an extension section extending from the inner wall of the through hole 1031, thereby limiting the bearing 6 to move towards one side of the cavity 101. And as a preferred embodiment, the first limiting portion 1032 is integrally formed on the bottom wall 103 for better structural strength. In addition, the first limiting portion 1032 may be provided separately, and may be provided according to actual conditions.

In addition, as a preferred embodiment, the second limiting portion includes a retaining ring 7 which is retained at an end portion of the bearing 6, and the retaining ring 7 is connected to the bottom wall 103. And as preferred, refer to fig. 1 and 2, the retainer 7 is screwed with the bottom wall 103 to ensure the connection strength between the two, and the retainer 7 is located at the bottom end of the bearing 6 to limit the bearing 6 from falling off.

In addition, in order to avoid noise generated by the matching between the insertion end and the bearing 6, as a preferred embodiment, a first sealing ring 303 for sealing a gap between the bearing 6 and the insertion end is arranged between the bearing 6 and the insertion end, so as to eliminate the gap between the insertion end and the bearing 6 and reduce noise caused by the gap between the insertion end and the bearing 6 during operation. Preferably, the first seal ring 303 is compressed by interference in the gap, so that the service life of the bearing 6 and the entire motor can be prolonged without damaging the self-play of the bearing 6.

In this embodiment, an end cover 104 is disposed outside the retainer ring 7, and the end cover 104 is mounted on the bottom wall 103 and used for plugging the mounting hole. For the mating of the end cap 104 with the bottom wall 103, as a preferred embodiment, the bottom wall 103 is provided with a first groove 1034 on the outside. The end cap 104 includes an end cap main body 1041 and a clamping portion disposed at an edge of the end cap main body 1041, the clamping portion is clamped in the first groove 1034, and the end cap 104 is mounted on the bottom wall 103.

Referring to fig. 1 to 3, the outer side of the bottom wall 103 is provided with a first step surface 1033 and a second step surface 1035 which are arranged in a stepped manner from edge to center, the first groove 1034 is formed on the first step surface 1033, and the end cap main body 1041 abuts on the second step surface 1035. In addition, the clamping portion on the end cover main body 1041 includes a first flange 1042, a second flange 1043 and a third flange 1044 which are connected in sequence.

As shown in FIG. 3, the other end of the first flange 1042 is connected to the end cap body 1041 opposite to the end of the first flange 1042 connected to the second flange 1043. The second flange 1043 extends from the first flange 1042 in a direction away from the end cap body 1041, and the third flange 1044 is located on the same side of the second flange 1043 as the first flange 1042. The end cover main body 1041 realizes the connection and fixation between the end cover 104 and the bottom wall 103 through the interference fit between the third flange 1044 and the opposite sides of the second flange 1043 and the first groove 1034.

As a preferred embodiment, referring to fig. 2, a second recess 1036 is formed in the second stepped surface 1035, and a second seal ring 8 is fitted into the second recess 1036 to seal a gap between the end cap body 1041 and the second stepped surface 1035.

The brushless motor of this embodiment is powered on through the conductive pin 401 and the controller power, and the current is transmitted to the stator assembly 2 through the bus disc 4, and at this moment, the magnetic field generated by the stator assembly 2 and the magnetic field of the rotor 302 themselves generate a force, and the hollow shaft 301 of the rotor assembly 3 is driven to rotate around the central axis, so as to drive the ball screw in the external member 9 to rotate, and further drive the piston mechanism to reciprocate.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A brushless motor, comprising:

the device comprises a shell (1), wherein a cavity (101) with an opening (102) at one end is formed in the shell (1);

the rotor assembly (3) is rotatably arranged in the cavity (101);

the stator assembly (2) is fixedly arranged in the cavity (101) and sleeved outside the rotor assembly (3);

the bus coil (4) is installed at one end, facing the opening (102), of the stator assembly (2), and the bus coil (4) is provided with a plurality of conductive pieces extending towards the opening (102);

the PIN needles (5) correspond to the conductive pieces one by one, and the corresponding PIN needles (5) are connected with the conductive pieces; the middle part of each PIN needle (5) along the length direction of the PIN needle is sleeved with an injection molding piece (501).

2. The brushless electric machine of claim 1, wherein:

each injection molding (501) is sleeved with a rubber ring (502), and the rubber rings (502) are located in the middle of the injection molding (501) along the length direction of the PIN needle (5).

3. The brushless electric machine of claim 2, wherein:

the conductive pieces are conductive PINs (401), and the conductive PINs (401) and the PIN PINs (5) are in one-to-one correspondence.

4. The brushless electric machine according to any of claims 1-3, wherein:

relative to one end, provided with the opening (102), of the shell (1), the other end of the shell (1) is provided with a bottom wall (103) formed with a mounting hole;

the rotor assembly (3) is provided with an insertion end inserted in the bearing (6), and a first sealing ring (303) for sealing a gap between the bearing (6) and the insertion end is arranged between the bearing (6) and the insertion end.

5. The brushless electric machine of claim 4, wherein:

the mounting hole is a through hole (1031) with one end communicated with the cavity (101);

two ends of the bearing (6) are respectively provided with a first limiting part (1032) and a second limiting part so as to limit the installation position of the bearing (6) in the through hole (1031), and the first limiting part (1032) is arranged at one end, facing the cavity (101), of the bearing (6).

6. The brushless electric machine of claim 5, wherein:

the second limiting part comprises a retainer ring (7) which is arranged at the end part of the bearing (6) in a retaining way, and the retainer ring (7) is connected with the bottom wall (103);

an end cover (104) is arranged outside the retainer ring (7), and the end cover (104) is installed on the bottom wall (103) and used for plugging the installation hole.

7. The brushless electric machine of claim 6, wherein:

a first groove (1034) is formed in the outer side of the bottom wall (103);

the end cover (104) comprises an end cover main body (1041) and a clamping part arranged at the edge of the end cover main body (1041);

the clamping portion is clamped in the first groove (1034), and the end cover (104) is installed on the bottom wall (103).

8. The brushless electric machine of claim 7, wherein:

the outer side of the bottom wall (103) is provided with a first step surface (1033) and a second step surface (1035) which are arranged in a stepped manner from edge to center;

the first groove (1034) is formed on the first step surface (1033);

the end cap body (1041) abuts on the second step surface (1035).

9. The brushless electric machine of claim 8, wherein:

the clamping part comprises a first flanging (1042), a second flanging (1043) and a third flanging (1044) which are sequentially connected;

the other end of the first flanging (1042) is connected with the end cover main body (1041) relative to one end of the first flanging (1042) connected with the second flanging (1043);

the second flanging (1043) extends from the first flanging (1042) to a direction far away from the end cover main body (1041), and the third flanging (1044) and the first flanging (1042) are positioned on the same side of the second flanging (1043).

10. The brushless electric machine of claim 8, wherein:

a second groove (1036) is formed in the second step surface (1035), and a second sealing ring (8) is embedded in the second groove (1036) to seal a gap between the end cover main body (1041) and the second step surface (1035).

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