A rotor motor

Abstract

The application discloses a rotor motor and relates to the technical field of motors, wherein the rotor motor comprises a rotor part, a stator part, an electromagnetic brake part and a sealing assembly; the stator part comprises a stator coil and is used for driving the rotor part to rotate; the electromagnetic brake part comprises a brake coil and a magnetic conducting sheet; the brake coil is used for driving the magnetic conducting sheet; the magnetic conducting sheet is used for abutting and braking the rotor part; the sealing assembly is rotationally sealed with the rotor part, is used for sealingly wrapping the abutting and braking area of the electromagnetic brake part and the rotor part, and is internally provided with a containing cavity for containing the debris generated by the abutting and braking. The rotor motor wraps the abutting and braking area of the electromagnetic brake part and the rotor part through the sealing assembly, and the containing cavity is arranged to contain the debris generated by the abutting and braking, so that the influence on the working stability of the rotor motor and the influence on the braking effect are effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, and more particularly to a rotor electric machine. BACKGROUND

[0002] In the existing electric machine product line, the rotor electric machine generally includes a rotor part and a stator part, wherein the stator part includes a stator coil, and the rotor part includes a rotor magnetic group; when the stator coil is energized, a varying magnetic field can be generated to drive the rotor magnetic group to move, and then the rotor part rotates relative to the stator part; however, the existing rotor electric machine does not have the ability of active physical braking, and generally adopts the mode of integrating an electromagnetic brake outside the electric machine to enable the rotor electric machine to have the ability of electromagnetic braking.

[0003] The electromagnetic brake integrated outside generally adopts the arrangement mode of being arranged along the axial direction of the rotor part, which increases the axial size of the rotor electric machine and is not suitable for use in scenarios such as electric cars and robot joint components; therefore, in the prior art, the electromagnetic brake is integrated inside the electric machine to reduce the axial size of the rotor electric machine and meet the use requirements of scenarios such as electric cars and robot joint components.

[0004] However, when the electromagnetic brake brakes, it mainly relies on the abutting braking of the fixed part and the rotating part, that is, there is relative motion and friction between the fixed part and the rotating part during the process, and there is a possibility that a large amount of debris will be generated due to friction; the debris rotates with the rotor part and escapes everywhere in the electric machine; when the debris contacts the transmission pair or the coil in the electric machine, it will affect the working stability of the electric machine, such as causing the transmission pair to wear and the coil to short circuit.

[0005] In summary, how to solve the influence of the debris generated by the rotor electric machine integrated with the electromagnetic brake on the working stability of the electric machine is a problem that needs to be solved by the technical personnel in the field at present. SUMMARY

[0006] Therefore, the purpose of the present application is to provide a rotor electric machine, which wraps the abutting braking area of the electromagnetic brake part and the rotor part by setting a sealing assembly, and sets an accommodation cavity to accommodate the debris generated by the abutting braking, so as to avoid the debris generated by the abutting braking from escaping to other positions in the rotor electric machine, reduce the influence on the working stability of the rotor electric machine, and avoid the accumulation of debris in the braking area to reduce the influence on the braking effect.

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0008] A rotor electric machine, comprising:

[0009] a rotor part;

[0010] a stator part including a stator coil, configured to drive the rotor part to rotate.

[0011] The electromagnetic brake portion comprises a brake coil and a magnetic conducting sheet, the brake coil is used to drive the magnetic conducting sheet, and the magnetic conducting sheet is used to abut and brake with the rotor portion;

[0012] The sealing assembly is rotationally sealed with the rotor portion, is used to seal the abutment and braking area of the electromagnetic brake portion and the rotor portion, and is provided with a containing cavity inside, which is used to contain the debris generated by the abutment and braking.

[0013] Preferably, the electromagnetic brake portion further comprises a magnetic conducting cover, which is a ring structure with one open end, and the magnetic conducting sheet is slidingly arranged at the open end of the magnetic conducting cover;

[0014] The brake coil is arranged in the opening of the magnetic conducting cover;

[0015] When the magnetic conducting sheet abuts and brakes with the rotor portion, the magnetic conducting sheet can separate and seal the open end of the magnetic conducting cover and the area used for abutment and braking of the magnetic conducting sheet; and / or when the magnetic conducting sheet is released from the abutment and braking with the rotor portion, the magnetic conducting sheet can close the open end of the magnetic conducting cover.

[0016] Preferably, the containing cavity comprises a first containing cavity and a second containing cavity;

[0017] The first containing cavity is arranged at the area used for abutment and braking of the magnetic conducting sheet, the second containing cavity is arranged between the outer peripheral wall of the magnetic conducting cover and the rotor portion, and a communication channel is arranged between the first containing cavity and the second containing cavity;

[0018] When the magnetic conducting sheet moves to the abutment and braking position with the rotor portion, the magnetic conducting sheet closes the communication channel.

[0019] Preferably, the magnetic conducting cover and the non-coil part of the stator portion constitute the sealing assembly, and the abutment and braking area of the electromagnetic brake portion and the stator coil are respectively arranged on the inner and outer sides of the sealing assembly.

[0020] Preferably, the brake coil and the stator coil are coaxially arranged, and at least partially overlap in the axial direction;

[0021] A separation portion is arranged between the stator coil and the brake coil, which is used to isolate the electromagnetic interference between the stator coil and the brake coil.

[0022] Preferably, the stator coil is coaxially sleeved on the outer peripheral surface of the separation portion, and a first positioning mechanism for axial positioning is arranged between the stator portion and the separation portion;

[0023] The brake coil is coaxially sleeved on the inner circumferential surface of the isolation part, and a second positioning mechanism for axial positioning is arranged between the electromagnetic brake part and the isolation part.

[0024] Preferably, the rotor part comprises a coaxially fixed outer rotor and a rotor shaft.

[0025] The outer rotor is coaxially rotatably installed on the outside of the stator part.

[0026] The rotor shaft is a hollow shaft, and a through shaft is coaxially rotatably arranged in the inside of the rotor shaft.

[0027] Preferably, the rotor part, the stator part and the electromagnetic brake part are wrapped by a machine shell.

[0028] A planetary gear mechanism is arranged between the rotor shaft and the machine shell for power transmission.

[0029] Preferably, a wire passing channel is arranged in the through shaft and communicates with the inner cavity of the machine shell, and is used for arranging wires of the stator coil and the brake coil.

[0030] Preferably, an elastic member is arranged between the magnetic conducting sheet and the brake coil, and is used for driving the magnetic conducting sheet to move away from the brake coil and abut against the rotor part to brake.

[0031] The brake coil can attract the magnetic conducting sheet to move when the brake coil is powered, and the abutting brake on the rotor part is released.

[0032] Compared with the prior art, the rotor motor provided by the application has at least the following beneficial effects:

[0033] 1. By arranging the sealing assembly, the abutting brake area of the electromagnetic brake part and the rotor part is wrapped, so that the debris generated by the abutting brake is prevented from escaping to other positions in the motor, thereby preventing the debris from escaping to other transmission pairs in the motor and causing wear of the transmission pairs, and preventing the debris from escaping to the position of the coil in the motor and causing short circuit of the coil, thereby effectively improving the working stability of the rotor motor.

[0034] 2. The sealing assembly is provided with a containing cavity, so as to increase the space for containing the debris generated by the abutting brake, so that the debris generated by the abutting brake can accumulate in the containing cavity, thereby preventing the debris from continuously accumulating in the abutting brake area and affecting the braking effect, and effectively ensuring the braking effect of the rotor motor after long-term use. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only need to explain the embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the provided drawings.

[0036] Figure 1 Structure schematic diagram of the specific rotor motor provided by the present application;

[0037] Figure 2 Position relationship schematic diagram of the specific stator coil and brake coil provided by the present application;

[0038] Figure 3 Assembly schematic diagram of the specific electromagnetic brake part in the rotor motor provided by the present application;

[0039] Figure 4 The specific rotor motor provided by the present application Figure 3 Enlarged view of A in the figure;

[0040] Figure 5 The specific rotor motor provided by the present application Figure 3 Enlarged view of B in the figure;

[0041] Figure 6 Parts explosion diagram of the electromagnetic brake part provided by the present application;

[0042] Figure 7 Assembly schematic diagram of the electromagnetic brake part, rotor shaft and through shaft provided by the present application;

[0043] Figure 8 Assembly schematic diagram of the brake pad and rotor shaft provided by the present application.

[0044] In the figure:

[0045] 1, rotor part; 11, outer rotor; 12, rotor shaft; 121, sun gear;

[0046] 2, stator part; 21, stator coil; 22, positioning protrusion;

[0047] 3, electromagnetic brake part; 31, brake coil; 32, magnetic guide cover; 321, clamping groove; 322, wire passing hole; 33, magnetic guide sheet; 34, brake pad; 35, first friction sheet; 36, second friction sheet; 37, first accommodating cavity; 38, second accommodating cavity; 39, communication channel;

[0048] 4, isolation part; 41, positioning ring; 42, positioning groove; 43, positioning shaft shoulder; 44, positioning hole shoulder;

[0049] 5, planetary gear mechanism; 51, planet carrier; 52, planet gear; 53, ring gear;

[0050] 6, cabinet;

[0051] 7, through shaft; 71, wire passage. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0053] The core of the present application is to provide a rotor motor, by setting a sealing assembly, wrapping the abutting brake area of the electromagnetic brake part and the rotor part, and setting a containing cavity, containing the debris generated by abutting brake, avoiding the debris generated by abutting brake escaping to other positions in the rotor motor, reducing the influence on the working stability of the rotor motor, and avoiding the accumulation of debris in the brake area, reducing the influence on the brake effect.

[0054] Embodiment one:

[0055] Please refer to Figure 1 and Figure 2 A rotor motor, comprising:

[0056] The rotor part 1;

[0057] The stator part 2 comprises a stator coil 21, which is used to drive the rotor part 1 to rotate;

[0058] The electromagnetic brake part 3 comprises a brake coil 31 and a magnetic guide sheet 33, the brake coil 31 is used to drive the magnetic guide sheet 33, and the magnetic guide sheet 33 is used to abut and brake with the rotor part 1;

[0059] The sealing assembly is rotationally sealed with the rotor part 1, used to seal and wrap the abutting brake area of the electromagnetic brake part 3 and the rotor part 1, and the sealing assembly is provided with a containing cavity inside, used to contain the debris generated by abutting brake.

[0060] As shown in Figure 1 and Figure 2 The stator part 2 of the rotor motor is provided with a stator coil 21, which generates a magnetic field after being energized, and can drive the magnetic group in the rotor part 1, and further drive the rotor part 1 to rotate. In the design, the rotor part 1 and the stator coil 21 of the stator part 2 are coaxially arranged, and the axial parts of the two are partially or completely overlapped, reducing the axial space occupation of the rotor motor;

[0061] The electromagnetic brake part 3 includes a brake coil 31 and a magnetic guide sheet 33. When the brake coil 31 is powered, a magnetic force is generated to drive the magnetic guide sheet 33 to move, and by controlling the power-on and power-off of the brake coil 31, the actual position of the magnetic guide sheet 33 and the abutting relationship between the magnetic guide sheet 33 and the rotor part 1 can be changed, thereby achieving braking and unbraking of the rotor part 1.

[0062] As shown in Figure 3 and Figure 5 , the abutting braking area of the electromagnetic brake part 3 and the rotor part 1 is a friction sheet driven by the magnetic guide sheet 33 and a brake sheet 34 coaxially sliding with the rotor shaft 12. When the friction sheet abuts against the brake sheet 34, a friction force is generated between the two, which inhibits the rotation of the brake sheet 34 and the rotor shaft 12, and further inhibits the rotation of the rotor part 1. Outside this area, a relatively fixed magnetic guide cover 32, a separation part 4 and a planet carrier 51 are arranged to jointly form a sealing assembly, which is rotationally sealed with the rotor shaft 12, and further wraps the abutting braking area of the electromagnetic brake part 3 and the rotor part 1 in a sealing area formed by the sealing assembly and the rotor shaft 12. When the friction sheet abuts against the brake sheet 34 for braking, the debris generated by the friction between the two can be completely wrapped in the sealing area formed by the sealing assembly and the rotor shaft 12, and cannot be discharged, thereby avoiding the contact between the debris and other transmission pairs in the rotor motor, and further avoiding the wear of other transmission pairs caused by the contact with the debris, thereby ensuring the working stability of the rotor motor. In addition, as shown in Figure 5 , a containing cavity is arranged between the magnetic guide cover 32 and the rotor shaft 12, and the debris generated by the abutting braking of the friction sheet and the brake sheet 34 can be contained in the containing cavity, thereby avoiding the long-term accumulation of debris in the abutting braking area and the influence of the debris on the braking effect, and further ensuring the braking effect of the electromagnetic brake part 3.

[0063] In some embodiments, the electromagnetic brake part 3 further includes a magnetic guide cover 32, which is a single-end open ring structure, and the magnetic guide sheet 33 is slidingly arranged at the open end of the magnetic guide cover 32.

[0064] The brake coil 31 is arranged in the opening of the magnetic guide cover 32.

[0065] When the magnetic guide sheet 33 abuts against the rotor part 1 for braking, the magnetic guide sheet 33 can separate and seal the open end of the magnetic guide cover 32 and the area used for abutting braking by the magnetic guide sheet 33; and / or when the magnetic guide sheet 33 is unbraked from the rotor part 1, the magnetic guide sheet 33 can close the open end of the magnetic guide cover 32.

[0066] As shown in Figure 5As shown, by increasing the single-end opening magnetic shield 32, the installation and fixation of the brake coil 31 are facilitated. Meanwhile, the magnetic shield 32 is made of magnetic material, such as soft iron, which is used to arrange the magnetic field generated by the brake coil 31 to increase the axial magnetic field strength, i.e., to improve the driving force on the magnetic sheet 33, which helps to improve the normal pressure between the magnetic sheet 33 and the brake sheet 34, and further improve the braking effect of the rotor part 1.

[0067] The magnetic sheet 33 is arranged at the opening end of the magnetic shield 32. When the magnetic sheet 33 moves to the opening position of the magnetic shield 32, the brake coil 31 in the magnetic shield 32 can be sealed to avoid the debris from entering the magnetic shield 32 and contacting the brake coil 31. In some embodiments, the brake coil 31 is in a plastic package, which further improves the ability to isolate the debris and effectively reduces the impact of the debris on the brake coil 31.

[0068] As shown in FIG. 1, Figure 5 When the magnetic sheet 33 is close to the opening of the magnetic shield 32 and seals the opening, the magnetic sheet 33 is disengaged from the brake sheet 34, i.e., the rotor part 1 is disengaged from the brake. At this time, the rotor part 1 rotates at high speed under the drive of the stator part 2. Since the opening of the magnetic shield 32 is sealed, the debris generated in the last braking period will not enter the cavity in the magnetic shield 32 through the opening of the magnetic shield 32, i.e., will not contact the brake coil 31.

[0069] When the magnetic sheet 33 is away from the opening of the magnetic shield 32 and is in abutment with the brake sheet 34, the rotor part 1 is braked, i.e., the rotor part 1 stops rotating. The total amount of debris entering the cavity in the magnetic shield 32 is limited due to the lack of kinetic energy, which has a small impact on the brake coil 31.

[0070] In some embodiments, the accommodation cavity includes a first accommodation cavity 37 and a second accommodation cavity 38.

[0071] The first accommodation cavity 37 is arranged at the region where the magnetic sheet 33 is used for abutment braking, and the second accommodation cavity 38 is arranged between the outer peripheral wall of the magnetic shield 32 and the rotor part 1. The first accommodation cavity 37 and the second accommodation cavity 38 are provided with a communication channel 39.

[0072] When the magnetic sheet 33 moves to the abutment braking position with the rotor part 1, the magnetic sheet 33 closes the communication channel 39.

[0073] As shown in FIG. 1, Figure 5 The first accommodation cavity 37 and the second accommodation cavity 38 are provided with a communication channel 39.

[0074] Meanwhile, as shown in FIG. 1, Figure 5As shown, the shaft shoulder is arranged on the rotor shaft 12, when the magnetic conducting sheet 33 drives the friction sheet to abut against the brake sheet 34 to brake, the magnetic conducting sheet 33 contacts with the shaft shoulder and rotates to seal, that is, the communication channel 39 is sealed, and thus the debris generated when the friction sheet abuts against the brake sheet 34 to brake can only be accommodated in the first accommodating cavity 37;

[0075] When the rotor motor is unbraked, that is, the magnetic conducting sheet 33 moves to the opening of the magnetic conducting cover 32 to seal, the magnetic conducting sheet 33 is separated from the shaft shoulder of the rotor shaft 12, at this time, the communication channel 39 is opened, and the debris originally in the first accommodating cavity 37 can enter the second accommodating cavity 38 through the communication channel 39, the second accommodating cavity 38 is separated from the abutting and braking area of the friction sheet and the brake sheet 34, so the debris will not affect the abutting and braking of the friction sheet and the brake sheet 34, thereby ensuring the braking effect;

[0076] Moreover, when the debris is transferred from the first accommodating cavity 37 to the second accommodating cavity 38, the magnetic conducting sheet 33 seals the opening of the magnetic conducting cover 32, that is, the debris cannot also enter the inner cavity of the magnetic conducting cover 32, avoiding the influence of the debris on the brake coil 31.

[0077] In some embodiments, the magnetic conducting cover 32 and the non-coil part of the stator part 2 form a sealing assembly, and the abutting and braking area of the electromagnetic brake part 3 and the stator coil 21 are arranged on the inner and outer sides of the sealing assembly, respectively.

[0078] As shown in Figure 3 and Figure 5 , the magnetic conducting cover 32 and the non-coil part of the stator part 2 form a sealing assembly, and the abutting and braking area of the electromagnetic brake part 3 and the stator coil 21 are arranged on the inner and outer sides of the sealing assembly, respectively.

[0079] In some embodiments, the brake coil 31 and the stator coil 21 are coaxially arranged and at least partially overlap in the axial direction;

[0080] The isolation part 4 is arranged between the stator coil 21 and the brake coil 31, for isolating the electromagnetic interference between the stator coil 21 and the brake coil 31.

[0081] As shown in Figure 1 , Figure 2 and Figure 3 , the rotor part 1, the stator part 2 and the electromagnetic brake part 3 are coaxially arranged and at least partially overlap in the axial direction, as shown in Figure 2 , the outer rotor 11, the stator coil 21 and the brake coil 31 are coaxially arranged and overlap in the axial direction, effectively shortening the size of the rotor motor in the axial direction;

[0082] Meanwhile, the isolation part 4 is arranged between the stator coil 21 and the brake coil 31, and is made of non-magnetic conductive material, such as brass, aluminum, etc., which can effectively isolate the electromagnetic influence between the two coils, ensure the driving force of the stator coil 21 to the outer rotor 11, and ensure the driving force of the brake coil 31 to the magnetic conductive sheet 33, avoiding the decline of motor power performance and brake performance caused by electromagnetic influence.

[0083] In some embodiments, the stator coil 21 is coaxially sleeved on the outer circumferential surface of the isolation part 4, and a first positioning mechanism for axial positioning is arranged between the stator part 2 and the isolation part 4.

[0084] The brake coil 31 is coaxially sleeved on the inner circumferential surface of the isolation part 4, and a second positioning mechanism for axial positioning is arranged between the electromagnetic brake part 3 and the isolation part 4.

[0085] As shown in Figure 4 and Figure 6 , the isolation part 4 is a sleeve structure, and the outer circumferential wall is provided with a positioning shaft shoulder 43. When the stator part 2 is sleeved on the outer circumferential surface of the isolation part 4, the end of the stator part 2 abuts against the positioning shaft shoulder 43, thereby effectively ensuring the relative positional relationship between the stator part 2 and the isolation part 4, i.e., the relative positional relationship between the stator coil 21 and the isolation part 4 is stable.

[0086] As shown in Figure 4 and Figure 6 , the inner circumferential wall of the isolation part 4 is provided with a positioning hole shoulder 44 and a positioning ring 41, and the outer circumferential wall of the magnetic conductive cover 32 is provided with a clamping groove 321 and an outer shaft shoulder. During assembly, the positioning ring 41 is clamped in the clamping groove 321, ensuring the relative positional relationship between the magnetic conductive cover 32 and the isolation part 4 is stable, and at the same time, the outer shaft shoulder of the magnetic conductive cover 32 abuts against the positioning hole shoulder 44, inhibiting the axial relative movement between the magnetic conductive cover 32 and the isolation part 4. That is, when the brake coil 31 is electrified and generates a relative force with the magnetic conductive sheet 33, the magnetic conductive cover 32 and the isolation part 4 still have a relatively stable positional relationship, thereby ensuring the relative positional relationship between the brake coil 31 and the isolation part 4 is stable.

[0087] In summary, by ensuring the positional relationship between the stator coil 21 and the brake coil 31 and the isolation part 4 is stable, and then ensuring the positional relationship between the stator coil 21, the brake coil 31 and the isolation part 4 is stable, i.e., the isolation part 4 effectively isolates the magnetic field generated by the stator coil 21 and the brake coil 31, reducing electromagnetic interference.

[0088] In some embodiments, as shown in Figure 6As shown, a positioning groove 42 is provided axially on the outer peripheral wall of the isolation part 4, and a positioning protrusion 22 is provided on the inner peripheral wall of the stator part 2. When the stator part 2 is assembled with the isolation part 4, the positioning protrusion 22 is engaged in the positioning groove 42 and can slide in the positioning groove 42 until the stator part 2 and the isolation part 4 are assembled. After assembly, the positioning protrusion 22 and the positioning groove 42 limit each other and suppress the mutual rotation of the stator part 2 and the isolation part 4.

[0089] The magnetic shield 32 is directly fixed to the planetary carrier 51 by bolts, and the planetary carrier 51 is directly fixed to the stator 2 by bolts. This achieves relative fixation between the magnetic shield 32 and the isolation part 4, restricting their relative rotation. That is, the stator 2, the isolation part 4 and the electromagnetic brake part 3 are not only fixed in relative position in the axial direction, but also cannot rotate relative to each other. This avoids the reduction of the electromagnetic isolation effect of the isolation part 4 on the stator coil 21 and the brake coil 31 due to the relative movement of the three.

[0090] In some embodiments, the rotor portion 1 includes an outer rotor 11 and a rotor shaft 12 that are coaxially fixed;

[0091] The outer rotor 11 is coaxially mounted on the outside of the stator section 2;

[0092] The rotor shaft 12 is a hollow shaft, and a through shaft 7 is coaxially rotatably arranged inside it. The stator part 2 is coaxially and fixedly connected to the through shaft 7.

[0093] By setting the outer rotor 11 outside the stator 2, the outer rotor 11 obtains a larger radius of rotation, which effectively improves the output torque of the motor. At the same time, the rotor shaft 12 is set to facilitate the connection of the speed transmission assembly.

[0094] Meanwhile, a through shaft 7 is provided inside the rotor shaft 12 and fixed relative to the stator 2, so as to facilitate the fixed connection of the stator 2 to the equipment.

[0095] In some embodiments, it is designed as an internal rotor motor, that is, the rotor part 1 is arranged inside the stator part 2, which can also achieve the above-mentioned functions.

[0096] In some embodiments, the device also includes a housing 6, which encloses the rotor portion 1, the stator portion 2, and the electromagnetic brake portion 3.

[0097] A planetary transmission mechanism 5 is provided between the rotor shaft 12 and the housing 6 for power transmission.

[0098] like Figure 1 As shown, when the rotor motor is used as a hub motor, its housing 6 serves as the output part of rotation. By setting a reduction mechanism between the rotor part 1 and the housing 6, the rotor motor can reduce speed and increase torque. The reduction mechanism adopts a planetary speed change mechanism 5, which helps to reduce the weight of the motor and shorten the axial dimension of the motor.

[0099] Meanwhile, the planet carrier 51 of the planetary gear mechanism 5 can serve as a non-coil part of the stator part 2 for jointly forming a sealed assembly with the inner part of the electromagnetic brake part 3.

[0100] In some embodiments, the through shaft 7 is provided with a wire passing channel 71 communicating with the inner cavity of the casing 6 for wire arrangement of the stator coil 21 and the brake coil 31.

[0101] As shown in Figure 1 , the through shaft 7 includes a partial segment hollow structure communicating with the inner cavity of the casing 6, which can serve as the wire passing channel 71 for wire arrangement of the stator coil 21 and / or the brake coil 31.

[0102] Meanwhile, as shown in Figure 7 , a wire passing hole 322 is provided on the side wall of the magnetic shield 32 for wire passing of the brake coil 31, and after assembly, a material such as resin glue can be used to seal the wire passing hole 322 to avoid debris entering the inner cavity of the magnetic shield 32 through the wire passing hole 322.

[0103] In some embodiments, a resilient member is provided between the magnetic sheet 33 and the brake coil 31 for driving the magnetic sheet 33 away from the brake coil 31 and abutting against the rotor part 1 for braking.

[0104] The brake coil 31 can attract the magnetic sheet 33 to move to release the abutting braking of the rotor part 1.

[0105] As shown in Figure 2 and Figure 7 , the opening end side wall of the magnetic shield 32 is provided with a mounting hole, and the resilient member is mounted in the mounting hole for driving the magnetic sheet 33 away from the magnetic shield 32 and driving the magnetic sheet 33 to abut against the rotor part 1 for braking, i.e. when the brake coil 31 loses power, the electromagnetic brake part 3 can abut against the rotor part 1 for braking.

[0106] When the brake coil 31 is powered, the magnetic attraction force generated can attract the magnetic sheet 33 to abut against the rotor part 1 for braking, and in the process, the resilient member is compressed and stored, and when the brake coil 31 loses power, the resilient member drives the magnetic sheet 33 to abut against the rotor part 1 for braking again.

[0107] Embodiment Two:

[0108] Please refer to Figure 1 and Figure 2 , a rotor motor, comprising:

[0109] a rotor part 1;

[0110] a stator part 2 including a stator coil 21 for driving the rotor part 1 to rotate;

[0111] The electromagnetic brake part 3 comprises a brake coil 31 and a magnetic conducting sheet 33, the brake coil 31 is used to drive the magnetic conducting sheet 33 to move, and the magnetic conducting sheet 33 is used to abut against the rotor part 1 to brake;

[0112] The brake coil 31 and the stator coil 21 are coaxially arranged and at least partially overlap in the axial direction.

[0113] As shown in Figure 1 and Figure 2 , the stator part 2 of the rotor motor is provided with a stator coil 21, which generates a magnetic field after being energized, and can drive the magnetic group in the rotor part 1, thereby driving the rotor part 1 to rotate. In the design, the rotor part 1 and the stator coil 21 of the stator part 2 are coaxially arranged and at least partially overlap in the axial direction, thereby reducing the axial space occupation of the rotor motor.

[0114] The electromagnetic brake part 3 comprises a brake coil 31 and a magnetic conducting sheet 33, the brake coil 31 is used to drive the magnetic conducting sheet 33 to move, and the magnetic conducting sheet 33 is used to abut against the rotor part 1 to brake;

[0115] As shown in Figure 2 , the stator coil 21 and the brake coil 31 are coaxially arranged and axially overlap, so that the rotor part 1 and the electromagnetic brake part 3 partially overlap in the axial direction. Compared with the arrangement mode that the rotor part 1 and the electromagnetic brake part 3 are arranged in the axial direction, the axial size of the rotor motor is effectively shortened.

[0116] In some embodiments, a separation part 4 is arranged between the stator coil 21 and the brake coil 31 to isolate the electromagnetic interference between the stator coil 21 and the brake coil 31.

[0117] As shown in Figure 2 , when the stator coil 21 and the brake coil 31 are coaxial and axially overlap, the magnetic fields generated by the two coils when they are energized at the same time will interfere with each other. Therefore, by arranging a separation part 4 between the two coils, the two coils can be electromagnetically isolated, thereby avoiding the mutual influence of the magnetic fields of the two coils and further avoiding the influence on the dynamic performance and braking performance of the rotor motor.

[0118] In some embodiments, the separation part 4 is a sleeve structure made of a non-magnetic conducting material and is coaxially arranged with the stator coil 21 and the brake coil 31.

[0119] The brake coil 31 and the stator coil 21 are arranged on the inner and outer sides of the sleeve structure, respectively.

[0120] As shown in Figure 2As shown, the isolation part 4 adopts a sleeve structure made of non-magnetic materials, such as aluminum sleeves or copper sleeves, which can shield the magnetic field and reduce the mutual influence of the magnetic fields generated by the two coils.

[0121] Meanwhile, the inner and outer walls of the isolation section 4 are provided with positioning mechanisms, which are used to fix the relative positions of the electromagnetic brake section 3 and the stator section 2 with the isolation section 4, respectively, so as to ensure that the relative positional relationship of the isolation section 4, the stator section 2 and the electromagnetic brake section 3 is stable during use, and the isolation section 4 is always located between the stator coil 21 and the brake coil 31, which can isolate the magnetic fields generated by the two and avoid mutual interference.

[0122] In some embodiments, the electromagnetic brake unit 3 further includes a magnetic shield 32, and the brake coil 31 is arranged in the opening of the magnetic shield 32;

[0123] The magnetic shield 32 has an opening at one end, and the magnetic sheet 33 is slidably disposed at one end of the opening of the magnetic shield 32.

[0124] like Figure 2 As shown, by setting a magnetic shield 32 made of magnetic material, such as a magnetic shield 32 made of soft iron material, the axial magnetic force of the magnetic field generated by the brake coil 31 can be effectively enhanced, thereby increasing the driving force on the magnetic sheet 33. At the same time, the design of the magnetic shield 32 with a single-end opening can increase the physical protection of the brake coil 31, even if the assembly and position of the brake coil 31 are fixed.

[0125] In some embodiments, an elastic element is provided between the magnetic sheet 33 and the brake coil 31 to drive the magnetic sheet 33 away from the brake coil 31 and to abut against the rotor portion 1 for braking.

[0126] When the brake coil 31 is energized, it can attract the magnetic sheet 33 to move, thus releasing the braking force on the rotor 1.

[0127] In practical use, an elastic element is provided between the brake coil 31 and the magnetic sheet 33 along the movement direction of the magnetic sheet 33. The elastic element is initially in a compressed state, which can drive the magnetic sheet 33 away from the brake coil 31 and abut against the rotor part 1 for braking. When the brake coil 31 is energized, it generates a magnetic attraction force on the magnetic sheet 33, attracting the magnetic sheet 33 to approach the brake coil 31 and releasing the abutment braking on the rotor part 1. That is, when the rotor motor is in a completely de-energized state, the brake coil 31 is not energized, and the rotor motor can still be braked under the drive of the elastic element.

[0128] like Figure 2 As shown, in practical applications, the sidewall of the opening end of the magnetic shield 32 is provided with mounting holes along the axial direction, and the elastic element is installed in the mounting holes to ensure the stability of the position of the elastic element during use.

[0129] In some embodiments, the electromagnetic brake part 3 further comprises a brake pad 34, a first friction plate 35 and a second friction plate 36, the brake pad 34 is arranged between the first friction plate 35 and the second friction plate 36;

[0130] The brake pad 34 is coaxially slidingly installed with the rotor part 1;

[0131] The first friction plate 35 is fixedly installed opposite to the magnetic conducting sheet 33;

[0132] The second friction plate 36 is fixedly installed opposite to the stator part 2;

[0133] The magnetic conducting sheet 33 can drive the brake pad 34 to move, so that the two sides of the brake pad 34 are respectively abutted and braked by the first friction plate 35 and the second friction plate 36.

[0134] As shown in FIGS. Figure 6 and Figure 8 The brake pad 34 is coaxially slidingly connected with the rotor part 1 in the form of spline, when the magnetic conducting sheet 33 drives the first friction plate 35 to abut against the brake pad 34, the brake pad 34 is pushed to move synchronously along the axial direction until the other side of the brake pad 34 abuts against the second friction plate 36, at this time, the two sides of the brake pad 34 are respectively abutted and braked by the first friction plate 35 and the second friction plate 36, and since the moving direction of the brake pad 34 is the same as the abutting direction of the first friction plate 35 and the second friction plate 36, the first friction plate 35 and the second friction plate 36 can exert equal and opposite normal forces on the brake pad 34, so that equal braking forces are generated on both sides of the brake pad 34, thereby improving the braking effect of the brake pad 34;

[0135] At the same time, since the first friction plate 35 and the second friction plate 36 cannot rotate relative to the stator part 2, the braking force of the first friction plate 35 and the second friction plate 36 on the brake pad 34 is transmitted to the rotor part 1 through the brake pad 34, thereby realizing the braking of the rotor part 1.

[0136] In some embodiments, the brake pad 34, the first friction plate 35 and the second friction plate 36 are all coaxially arranged in ring structure, and the projections of the three along the axial direction at least partially overlap.

[0137] In actual use, the brake pad 34 and the friction plate are all in ring structure, the end face of the brake pad 34 abuts against the end face of the friction plate for braking, which increases the abutting area of the two, helps to increase the braking force between the two, and further improves the braking effect.

[0138] In some embodiments, the rotor part 1 comprises a coaxially fixed outer rotor 11 and a rotor shaft 12;

[0139] The outer rotor 11 is coaxially arranged on the outer circumferential side of the stator coil 21;

[0140] The brake coil 31 is coaxially arranged at the inner circumferential side of the stator coil 21.

[0141] The rotor shaft 12 is coaxially arranged at the inner circumferential side of the brake coil 31.

[0142] The rotor shaft 12 is provided with a power output end.

[0143] As shown in Figure 1 and Figure 2 , the outer rotor 11, the stator coil 21 and the brake coil 31 are coaxially arranged from outside to inside in sequence, and axially partially or wholly overlap, effectively reducing the axial space occupation of the rotor motor, and the stator coil 21 is arranged between the outer rotor 11 and the brake coil 31, effectively reducing the influence of the magnetic field generated by the brake coil 31 on the inner magnetic group of the outer rotor 11, and the outer rotor 11 is arranged at the outermost side, having a larger rotary radius, which helps to improve the output torque of the rotor motor, and the rotor shaft 12 arranged at the central position of the rotor part 1 helps to connect the speed reduction mechanism to realize the speed changing function.

[0144] Preferably, the rotor motor further comprises a housing 6 and a through shaft 7 coaxially arranged;

[0145] The rotor shaft 12 is a hollow shaft, and the through shaft 7 is coaxially arranged in the rotor shaft 12, and the stator part 2 is fixedly connected with the through shaft 7 coaxially;

[0146] The planetary gear mechanism 5 is arranged between the housing 6 and the rotor shaft 12 for power transmission.

[0147] As shown in Figure 1 , the rotor motor adopts an outer rotor design, i.e. the stator part 2 is inside the rotor part 1, wherein the through shaft 7 is fixedly connected with the stator part 2, and the rotor part 1 is power connected with the housing 6 through the planetary gear mechanism 5, which can complete the speed changing and torque changing of the output of the rotor part 1, and depending on the structural design of the planetary gear mechanism 5, the axial size of the rotor motor can be effectively shortened to meet the use requirements of various use scenarios of the rotor motor;

[0148] That is, when the rotor motor is in use, the through shaft 7 is fixed with the fixed end of the equipment, and the housing 6 is fixed with the moving end of the equipment, and when working, the stator coil 21 is powered to drive the rotor part 1 to rotate, and after speed changing and torque changing through the planetary gear mechanism 5, the power is transmitted to the housing 6 to drive the moving end of the equipment to rotate relative to the fixed end of the equipment.

[0149] In some embodiments, the planetary gear mechanism 5 comprises a sun gear 121, a planet carrier 51, a planet gear 52 and a ring gear 53.

[0150] The sun gear 121 is fixedly connected with the rotor shaft 12 coaxially;

[0151] The planet carrier 51 is fixedly connected with the stator part 2 oppositely.

[0152] The large gear ring 53 is coaxially and fixedly connected to the housing 6.

[0153] like Figure 1 As shown, the planetary transmission mechanism 5 includes a sun gear 121, planet gears 52, a large gear ring 53, and a planet carrier 51. The sun gear 121 meshes with multiple planet gears 52 simultaneously, and the multiple planet gears 52 mesh with the large gear ring 53 simultaneously. All planet gears 52 are rotatably mounted to the planet carrier 51, which is fixedly connected to the through shaft 7 and / or the stator section 2. The sun gear 121 can be coaxially fixedly connected to the rotor shaft 12 or integrally formed with the rotor shaft 12. The large gear ring 53 can be part of the housing 6 and coaxially fixedly connected to the other parts of the housing 6 by bolts to reduce the weight of the rotor motor. The planet carrier 51 can be part of the stator section 2 and is used to fix the stator coil 21 to the through shaft 7 to ensure the positional stability of the stator coil 21 during operation.

[0154] In practical use, such as Figure 1 As shown, the planetary carrier 51 has a single-end closed structure, which together with the rotor part 1, the magnetic shield 32 and / or the isolation part 4 forms a sealing assembly. The sealing assembly completely encloses the electromagnetic brake part 3, effectively preventing the debris generated by the magnetic sheet 33 and / or brake sheet 34 in the electromagnetic brake part 3 from entering the stator coil 21, thus avoiding affecting the stability of the stator coil 21.

[0155] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0156] The rotor motor provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A rotor machine, characterized by The application relates to a motor with an electromagnetic brake. The motor comprises: a rotor part (1); a stator part (2) comprising a stator coil (21) for driving the rotor part (1) to rotate; an electromagnetic brake part (3) comprising a brake coil (31) and a magnetic conducting sheet (33), the brake coil (31) being used for driving the magnetic conducting sheet (33), and the magnetic conducting sheet (33) being used for abutting and braking the rotor part (1); a sealing assembly, which is rotationally sealed with the rotor part (1) and is used for sealingly wrapping an abutting and braking area of the electromagnetic brake part (3) and the rotor part (1), and the sealing assembly is internally provided with a containing cavity for containing debris generated by the abutting and braking; the electromagnetic brake part (3) further comprises a magnetic conducting cover (32), which is a single-end opening annular structure, and the magnetic conducting sheet (33) is slidingly arranged at the opening end of the magnetic conducting cover (32); the containing cavity comprises a first containing cavity (37) and a second containing cavity (38); the first containing cavity (37) is arranged at an area where the magnetic conducting sheet (33) is used for abutting and braking, the second containing cavity (38) is arranged between the outer peripheral wall of the magnetic conducting cover (32) and the rotor part (1), and a communication channel (39) is arranged between the first containing cavity (37) and the second containing cavity (38); 2. The electric machine of claim 1, wherein when the magnetic conducting sheet (33) moves to an abutting and braking position of the rotor part (1), the magnetic conducting sheet (33) closes the communication channel (39). the brake coil (31) is arranged in the opening of the magnetic conducting cover (32); 3. The electric machine of claim 2, wherein, when the magnetic conducting sheet (33) abuts and brakes the rotor part (1), the magnetic conducting sheet (33) can separate and seal the opening end of the magnetic conducting cover (32) and the area where the magnetic conducting sheet (33) is used for abutting and braking; and / or when the magnetic conducting sheet (33) is separated from the abutting and braking of the rotor part (1), the magnetic conducting sheet (33) can close the opening end of the magnetic conducting cover (32).

4. The electric machine of claim 1, wherein the magnetic conducting cover (32) and a non-coil part of the stator part (2) constitute the sealing assembly, and the abutting and braking area of the electromagnetic brake part (3) and the stator coil (21) are arranged on the inner and outer sides of the sealing assembly, respectively. the brake coil (31) and the stator coil (21) are coaxially arranged and at least partially overlap in the axial direction; 5. The electric machine of claim 4, wherein, an isolation part (4) is arranged between the stator coil (21) and the brake coil (31) for isolating electromagnetic interference between the stator coil (21) and the brake coil (31). the stator coil (21) is coaxially sleeved on the outer peripheral surface of the isolation part (4), and a first positioning mechanism for axial positioning is arranged between the stator part (2) and the isolation part (4); 6. The electric machine of claim 5, wherein, the brake coil (31) is coaxially sleeved on the inner peripheral surface of the isolation part (4), and a second positioning mechanism for axial positioning is arranged between the electromagnetic brake part (3) and the isolation part (4). the rotor part (1) comprises a coaxially fixed outer rotor (11) and a rotor shaft (12). The outer rotor (11) is coaxially rotatably installed outside the stator part (2); The rotor shaft (12) is a hollow shaft, the inside of which is coaxially rotatably provided with a through shaft (7), and the stator part (2) is coaxially fixedly connected with the through shaft (7).

7. The electric machine of claim 6, wherein, Further comprising a machine shell (6), the machine shell (6) wraps the rotor part (1), the stator part (2) and the electromagnetic brake part (3); The rotor shaft (12) and the machine shell (6) are provided with a planetary gear mechanism (5) for power transmission.

8. The electric machine of claim 7, wherein, The through shaft (7) is provided with a wire passing channel (71) communicating with the inner cavity of the machine shell (6), for the wire arrangement of the stator coil (21) and the brake coil (31).

9. The electric machine of claim 1, wherein, The elastic member is arranged between the magnetic conducting sheet (33) and the brake coil (31), for driving the magnetic conducting sheet (33) away from the brake coil (31) and abutting against the rotor part (1) to brake; The brake coil (31) can attract the magnetic conducting sheet (33) to move when powered, and release the abutting brake on the rotor part (1).

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