Brushless motor

Abstract

The invention relates to the technical field of motors, in particular to a brushless motor, which comprises a driving shaft of which the tail end is rotationally connected with a shell main body; the output shaft is rotationally arranged on the shell body, the axis of the output shaft and the axis of the driving shaft are collinear, and the head end of the output shaft is connected with external execution equipment and used for driving the execution equipment to rotate; the transmission shaft sleeve sleeves the driving shaft and the output shaft and is used for driving the output shaft and the driving shaft to synchronously rotate; the driving module is arranged on the shell main body, is connected with the driving shaft and is used for driving the driving shaft to rotate; and the braking module is arranged on the shell main body, is connected with the transmission shaft sleeve and is used for braking the transmission shaft sleeve. The driving shaft, the transmission shaft sleeve and the output shaft which are of a split structure are adopted to output power of equipment, and the technical problem that in the prior art, the maintenance cost of a motor is high is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a brushless motor. Background Art

[0002] A brushless motor is a high-efficiency electric motor that uses electronic commutation technology. It replaces the mechanical brushes and commutator structure of a traditional brushless motor with a built-in controller and uses the electromagnetic interaction between a permanent magnet rotor and a stator winding to achieve power output.

[0003] In the prior art, brushless motors generally use friction braking solutions to brake the motor output shaft. For example, the Chinese utility model patent with the authorization announcement number CN208112391U proposes a speed-controlled brushless motor, including a motor body, a motor housing on the outside of the motor body, a motor shaft mounted on the motor body through a bearing, a brake end cover mounted on the right side of the motor housing by snap-in and bolt fixing, a motor shaft bearing mounted in the mounting groove in the brake end cover, the motor shaft passes through the through hole in the middle of the motor shaft bearing, a brake is mounted in the brake end cover, and the motor shaft passes through the through hole in the middle of the brake. During the braking process, the motor uses the brake mounted on its motor shaft to perform friction braking on the motor shaft to meet the demand for rapid braking.

[0004] However, for the above-mentioned speed-controlled brushless motor, the device adopts an integrally formed motor shaft, and directly performs friction braking on the motor shaft during braking. After multiple brakings, the motor shaft is easily seriously worn. In daily use, the motor shaft is easily seriously worn, and the motor shaft needs to be frequently replaced, resulting in a high motor maintenance cost. Secondly, due to the rigid connection between large inertia components such as the motor rotor and the motor shaft, a large rotational inertia needs to be overcome when braking the motor shaft, resulting in increased motor braking energy consumption, which seriously restricts the energy-saving performance of the equipment. Summary of the invention

[0005] In view of the technical problem in the prior art that the motor shaft is easily seriously worn during daily use, and the motor shaft needs to be frequently replaced, resulting in high motor maintenance costs, an embodiment of the present invention provides a brushless motor, comprising:

[0006] Shell body;

[0007] A driving shaft having a rear end rotatably connected to the housing body;

[0008] The output shaft disposed on the housing body is rotated, the central axis of the output shaft is colinear with the central axis of the driving shaft, and the head end of the output shaft is connected to an external actuator to drive the actuator to rotate;

[0009] The transmission shaft sleeve is mounted on the driving shaft and the output shaft to drive the output shaft to rotate synchronously with the driving shaft;

[0010] The driving module is arranged on the housing body, and the driving module is connected to the driving shaft, and is used to drive the driving shaft to rotate;

[0011] The brake module is arranged on the shell body and is connected to the transmission shaft sleeve for braking the transmission shaft sleeve.

[0012] Furthermore, the brake module comprises:

[0013] The bearing bracket is fixedly arranged on the inner wall of the shell body, and the bearing bracket is rotatably connected with the driving shaft;

[0014] An electromagnet is fixedly arranged on the bearing bracket;

[0015] An assembly bracket is fixedly arranged on the inner wall of the shell body;

[0016] A first friction plate, fixedly arranged on the assembly bracket;

[0017] The encoder is arranged on the assembly bracket, and the encoder is connected to the output shaft and is used to detect the rotation speed of the output shaft;

[0018] An assembly component is arranged on the transmission shaft sleeve, the assembly component is connected to the driving shaft and the output shaft, and is used for slidingly assembling the transmission shaft sleeve on the driving shaft and the output shaft;

[0019] The transmission cam is fixedly arranged on the transmission sleeve and is used to drive the transmission sleeve to slide along the axial direction of the output shaft;

[0020] A first magnet is fixedly arranged on the transmission protrusion, and the position of the first magnet corresponds to that of the electromagnet;

[0021] A second friction plate, fixedly arranged on the transmission lug;

[0022] The load component is arranged in the inner cavity of the shell body and is used for braking the transmission cam.

[0023] Further, the assembly components include:

[0024] A first assembly countersunk hole is arranged inside the transmission sleeve, a port of the first assembly countersunk hole is located at the head end face of the transmission sleeve, the tail end of the output shaft is movably plugged into the first assembly countersunk hole, the inner cavity shape of the first assembly countersunk hole is a prism, and the first assembly countersunk hole matches the radial cross-sectional shape of the tail end of the output shaft;

[0025] A return spring is arranged inside the first assembly countersunk hole, and two ends of the return spring are respectively connected to the output shaft and the inner wall of the first assembly countersunk hole, and is used for elastically supporting the transmission sleeve;

[0026] A second assembly countersunk hole is arranged inside the transmission sleeve, the end of the second assembly countersunk hole is located at the rear end surface of the transmission sleeve, and the head end of the driving shaft is movably plugged into the second assembly countersunk hole;

[0027] The second assembly countersunk hole is composed of a transmission section and an assembly section. The transmission section is located between the assembly section and the first assembly countersunk hole. The inner cavity shape of the transmission section is a prism. The transmission section matches the radial cross-sectional shape of the head end of the active shaft. The inner cavity shape of the assembly section is a cylinder. The maximum inner diameter of the transmission section is equal to the inner diameter of the assembly section. When the reset spring is in an extended state, the head end of the active shaft is movably connected with the transmission section.

[0028] Further, the load component comprises:

[0029] A plurality of first guide rails are fixedly arranged on the circumferential inner wall of the shell body, and any one of the first guide rails guides along the axial direction of the shell body;

[0030] A plurality of flywheel mechanisms are arranged in the inner cavity of the housing body, any one of the flywheel mechanisms is connected to a plurality of first guide rails, the plurality of flywheel mechanisms are arranged in sequence along the axial direction of the housing body, and the plurality of flywheel mechanisms are located between the second friction plate and the first friction plate;

[0031] A plurality of hydraulic buffers are fixedly arranged on the inner wall of the housing body, the plurality of hydraulic buffers are located outside the circumference of the assembly bracket, and the plurality of hydraulic buffers correspond to the position of one of the flywheel mechanisms;

[0032] A plurality of first heat dissipation holes are arranged on the outer wall of the shell body, and any first heat dissipation hole is connected to the cavities between the plurality of flywheel mechanisms and the first friction plates.

[0033] Furthermore, the flywheel mechanism comprises:

[0034] An assembly housing is movably disposed in the inner cavity of the housing body, the assembly housing is slidably connected to the plurality of first guide rails, the assembly housing is disposed along the radial direction of the housing body, the circumferential outer wall of the assembly housing is in contact with the circumferential inner wall of the housing body, and in the flywheel mechanism adjacent to the first friction plate, the assembly housing corresponds to the position of the plurality of hydraulic buffers;

[0035] A counterweight flywheel is movably arranged in the inner cavity of the assembly housing along the radial direction of the assembly housing, a transmission sleeve passes through the first assembly hole of the counterweight flywheel, and the central axis of the counterweight flywheel is colinear with the central axis of the transmission sleeve;

[0036] A rolling bearing is arranged in the inner cavity of the assembly housing along the radial direction of the assembly housing, the outer ring of the rolling bearing is fixedly connected to the circumferential inner wall of the assembly housing, and the inner ring of the rolling bearing is fixedly connected to the circumferential outer edge of the counterweight flywheel, and is used to rotatably assemble the counterweight flywheel in the inner cavity of the assembly housing;

[0037] The second magnet is fixedly arranged inside the counterweight flywheel. The second magnets in any adjacent pair of flywheel mechanisms repel each other. In the flywheel mechanism adjacent to the second friction plate, the second magnet and the first magnet repel each other.

[0038] Furthermore, the brake module also includes:

[0039] The piston cylinder is fixedly arranged on the circumferential inner wall of the housing body, the piston cylinder is a hollow circular tube, and the central axis of the piston cylinder is colinear with the central axis of the driving shaft;

[0040] An actuator piston is movably arranged in the inner cavity of the piston cylinder, and the closest distance between the circumferential side wall of the actuator piston and the circumferential inner wall of the piston cylinder is greater than zero;

[0041] A reciprocating transmission mechanism is arranged inside the housing body, the reciprocating transmission mechanism connects the driving shaft and the actuator piston, and is used to drive the actuator piston to slide back and forth along the axial direction of the piston cylinder;

[0042] A plurality of second heat dissipation holes are arranged on the outer wall of the shell body, and any second heat dissipation hole is connected to the cavity between the motor stator and the rear end of the driving shaft.

[0043] Furthermore, the reciprocating transmission mechanism comprises:

[0044] A reciprocating screw rod is arranged in the inner cavity of the housing body;

[0045] A second assembly hole is provided on the reciprocating screw rod, the reciprocating screw rod is rotatably sleeved on the driving shaft through the second assembly hole, and the central axis of the reciprocating screw rod is colinear with the central axis of the driving shaft;

[0046] The slider is fixedly arranged on the actuating piston, and the slider cooperates with the reciprocating screw rod to drive the actuating piston to slide along the axial direction of the piston cylinder;

[0047] A planetary gear transmission unit is arranged on the housing body, and the planetary gear transmission unit connects the driving shaft and the reciprocating screw rod to drive the reciprocating screw rod to rotate;

[0048] A plurality of guide members are arranged on the circumferential outer edge of the actuator piston;

[0049] A plurality of second guide rails are fixedly arranged on the circumferential inner wall of the piston cylinder. Any second guide rail is arranged along the axial direction of the piston cylinder. The plurality of second guide rails are respectively slidably connected with a plurality of guide members for circumferentially limiting the actuator piston.

[0050] Furthermore, the planetary gear transmission unit comprises:

[0051] A driving gear is fixedly sleeved on the driving shaft, the central axis of the driving gear is colinear with the central axis of the driving shaft, and the driving gear and the driving shaft rotate synchronously;

[0052] An inner gear ring is fixedly arranged on the circumferential inner wall of the housing body, and the central axis of the inner gear ring is colinear with the central axis of the driving shaft;

[0053] A plurality of driven gears are movably arranged in the inner cavity of the inner gear ring, and any driven gear is meshed with the driving gear and the inner gear ring at the same time;

[0054] A plurality of first connection ends are respectively connected to a plurality of driven gears for rotation of the planetary frame, and a second connection end of the planetary frame is fixedly connected to the reciprocating screw rod for driving the reciprocating screw rod to rotate.

[0055] Furthermore, the driver module includes:

[0056] The motor stator is fixedly arranged on the circumferential inner wall of the housing body;

[0057] The motor rotor is fixedly mounted on the driving shaft, and the positions of the motor rotor and the motor stator match each other, so as to drive the driving shaft to rotate;

[0058] The heat dissipation component is arranged on the driving shaft and is used for promoting the air flow in the inner cavity of the shell body.

[0059] Furthermore, the heat dissipation component comprises:

[0060] A plurality of fan blades are fixedly sleeved on the driving shaft, and the plurality of fan blades are sequentially arranged along the axial direction of the driving shaft;

[0061] A plurality of third heat dissipation holes are arranged on the outer wall of the shell body, and any third heat dissipation hole is connected to the cavity between the motor stator and the rear end of the driving shaft.

[0062] A brushless motor according to an embodiment of the present invention has the following beneficial effects:

[0063] 1. This equipment outputs the power of the equipment by adopting a split-structured driving shaft, transmission shaft sleeve and output shaft, and brakes the equipment by adopting a braking module to brake the transmission shaft sleeve, which effectively improves the technical problem in the prior art that the motor shaft is easily seriously worn and the motor shaft needs to be frequently replaced, resulting in high motor maintenance costs.

[0064] 2. This equipment outputs the power of this equipment by adopting a split-structured driving shaft, transmission sleeve and output shaft. When the brake module brakes this equipment, the driving transmission sleeve slides toward the head end of the output shaft, so that the head end of the driving shaft is separated from the transmission section of the second assembly countersunk hole, thereby cutting off the torque transmission between the driving shaft and the output shaft. This design makes it unnecessary to overcome the rotational inertia of the driving shaft when the brake module acts on the output shaft, significantly reducing the energy loss during the motor braking process, thereby achieving the energy saving effect of the motor.

[0065] 3. This equipment adopts multiple flywheel mechanisms. Before the first friction plate performs friction braking on the brake pad of the counterweight flywheel, the load of the counterweight flywheel of the multiple flywheel mechanisms is applied to the transmission shaft sleeve to reduce the rotational kinetic energy of the output shaft, thereby extending the service life of consumable accessories such as the first friction plate, the second friction plate and the brake pad on the counterweight flywheel, thereby further reducing the maintenance cost of this equipment.

[0066] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 It is a schematic diagram of assembling a brake module according to the first embodiment of the present invention;

[0068] Figure 2 for Figure 1 A partial enlarged schematic diagram of the middle A area;

[0069] Figure 3 It is a schematic diagram of the structural decomposition of an assembly component according to an embodiment of the present invention (the transmission shaft sleeve is processed in perspective);

[0070] Figure 4 is a schematic diagram of the internal structure according to the second embodiment of the present invention;

[0071] Figure 5 is a schematic diagram of the internal structure according to the third embodiment of the present invention;

[0072] Figure 6 Schematic diagram of the structural decomposition of the reciprocating transmission mechanism according to the third embodiment of the present invention.

[0073] Description of the attached figure title:

[0074] 1-housing body, 2-driving shaft, 3-output shaft, 4-transmission sleeve, 51-bearing bracket, 511-electromagnet, 52-assembly bracket, 521-first friction plate, 522-encoder, 531-first assembly countersunk hole, 532-reset spring, 533-second assembly countersunk hole, 5331-transmission section, 5332-assembly section, 54-transmission bump, 541-first magnet, 542-second friction plate, 551-first guide rail, 552-flywheel mechanism, 5521-assembly housing, 5522-counterweight flywheel, 55221-first assembly hole, 55222-brake pad, 55223-flywheel body, 5523-rolling bearing, 5524-second magnet, 553-hydraulic buffer, 554-first heat dissipation hole, 61-motor stator, 62-motor rotor, 631-fan blades, 632-third heat dissipation hole, 633-piston cylinder, 634-executor piston, 635-second heat dissipation hole, 6361-reciprocating screw, 6362-guide member, 6363-second guide rail, 6364-planetary gear transmission unit, 63641-driving gear, 63642-inner ring gear, 63643-driven gear, 63644-planetary carrier, 6365-slider. DETAILED DESCRIPTION

[0075] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to further illustrate the present invention.

[0076] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only reference directions of the accompanying drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention. In addition, in all embodiments, the same reference numerals represent the same elements.

[0077] Embodiment 1

[0078] Specifically, Figure 1 As shown, the present embodiment provides a brushless motor, comprising: a shell body 1; a driving shaft 2 rotatably connected to the shell body 1 at the rear end; an output shaft 3 rotatably arranged on the shell body 1, the axis of the output shaft 3 is colinear with the axis of the driving shaft 2, and the head end of the output shaft 3 is connected to an external actuator for driving the actuator to rotate; a transmission shaft sleeve 4, which is sleeved on the driving shaft 2 and the output shaft 3, and is used to drive the output shaft 3 to rotate synchronously with the driving shaft 2; a driving module is arranged on the shell body 1, and the driving module is connected to the driving shaft 2, and is used to drive the driving shaft 2 to rotate; a braking module is arranged on the shell body 1, and the braking module is connected to the transmission shaft sleeve 4, and is used to brake the transmission shaft sleeve 4.

[0079] Further, if Figure 1As shown, the brake module includes: a bearing bracket 51, which is fixedly arranged on the inner wall of the shell body 1, and the bearing bracket 51 is rotatably connected to the driving shaft 2; an electromagnet 511, which is fixedly arranged on the bearing bracket 51; an assembly bracket 52, which is fixedly arranged on the inner wall of the shell body 1; a first friction plate 521, which is fixedly arranged on the assembly bracket 52; an encoder 522, which is arranged on the assembly bracket 52, and the encoder 522 is connected to the output shaft 3 and is used to detect the rotation speed of the output shaft 3; an assembly component, which is arranged on the transmission sleeve 4, and the assembly component is connected to the driving shaft 2 and the output shaft 3, and is used to slide the transmission sleeve 4 on the driving shaft 2 and the output shaft 3; a transmission protrusion 54, which is fixedly arranged on the transmission sleeve 4, and is used to drive the transmission sleeve 4 to slide along the axial direction of the output shaft 3; a first magnet 541, which is fixedly arranged on the transmission protrusion 54, and the position of the first magnet 541 corresponds to that of the electromagnet 511; a second friction plate 542, which is fixedly arranged on the transmission protrusion 54; a load component, which is arranged in the inner cavity of the shell body 1, and is used to brake the transmission protrusion 54.

[0080] Further, if Figures 1 to 3 As shown, the assembly component includes: a first assembly countersunk hole 531, which is arranged inside the transmission shaft sleeve 4, and the port of the first assembly countersunk hole 531 is located at the head end face of the transmission shaft sleeve 4, the tail end of the output shaft 3 is movably plugged into the first assembly countersunk hole 531, and the inner cavity shape of the first assembly countersunk hole 531 is a prism, and the first assembly countersunk hole 531 matches the radial cross-sectional shape of the tail end of the output shaft 3; a return spring 532, which is arranged inside the first assembly countersunk hole 531, and the two ends of the return spring 532 are respectively connected to the output shaft 3 and the inner wall of the first assembly countersunk hole 531, for elastically supporting the transmission shaft sleeve 4; a second assembly countersunk hole 533, which is arranged inside the transmission shaft sleeve 4, and the port of the second assembly countersunk hole 533 is located at the transmission shaft sleeve 4, the head end of the driving shaft 2 is movably connected with the second assembly countersunk hole 533; the second assembly countersunk hole 533 is composed of a transmission section 5331 and an assembly section 5332, the transmission section 5331 is located between the assembly section 5332 and the first assembly countersunk hole 531, the inner cavity shape of the transmission section 5331 is a prism, the transmission section 5331 matches the radial cross-sectional shape of the head end of the driving shaft 2, the inner cavity shape of the assembly section 5332 is a cylinder, the maximum inner diameter of the transmission section 5331 is equal to the inner diameter of the assembly section 5332, when the reset spring 532 is in an extended state, the head end of the driving shaft 2 is movably connected with the transmission section 5331, and the connection between the transmission section 5331 and the connecting section is provided with a chamfer for transition.

[0081] Further, if Figures 1 to 3As shown, the load assembly includes: a plurality of first guide rails 551, which are fixedly arranged on the circumferential inner wall of the shell body 1, and any one of the first guide rails 551 is guided along the axial direction of the shell body 1; a plurality of flywheel mechanisms 552, which are arranged in the inner cavity of the shell body 1, and any one of the flywheel mechanisms 552 is connected to the plurality of first guide rails 551, and the plurality of flywheel mechanisms 552 are arranged in sequence along the axial direction of the shell body 1, and the plurality of flywheel mechanisms 552 are located between the second friction plate 542 and the first friction plate 521; a plurality of hydraulic buffers 553, which are fixedly arranged on the inner wall of the shell body 1, and the plurality of hydraulic buffers 553 are located on the circumferential outer side of the assembly bracket 52, and the plurality of hydraulic buffers 553 correspond to the position of one of the flywheel mechanisms 552; a plurality of first heat dissipation holes 554, which are opened on the outer wall of the shell body 1, and any one of the first heat dissipation holes 554 is connected to the cavity between the plurality of flywheel mechanisms 552 and the first friction plate 521.

[0082] Further, if Figures 1 to 3As shown, the flywheel mechanism 552 includes: an assembly shell 5521, which is movably arranged in the inner cavity of the shell body 1, the assembly shell 5521 is slidably connected with a plurality of first guide rails 551, the assembly shell 5521 is arranged along the radial direction of the shell body 1, and the circumferential outer wall of the assembly shell 5521 is fitted with the circumferential inner wall of the shell body 1. Specifically, the outer annular surface of the assembly shell 5521 is fitted with the circumferential inner wall of the shell body 1, and the circumferential outer wall of the assembly shell 5521 and the inner wall of the shell body are minimized. When air flows inside the housing body 1, the air flows mainly through the first assembly hole 55221 of the counterweight flywheel 5522. In the flywheel mechanism 552 adjacent to the first friction plate 521, the assembly housing 5521 corresponds to the positions of the plurality of hydraulic buffers 553. The counterweight flywheel 5522 is arranged in the inner cavity of the assembly housing 5521 along the radial direction of the assembly housing 5521. The transmission shaft sleeve 4 passes through the first assembly hole 55221 of the counterweight flywheel 5522. , the axis of the counterweight flywheel 5522 is colinear with the axis of the transmission shaft sleeve 4; the rolling bearing 5523 is arranged in the inner cavity of the assembly shell 5521 along the radial direction of the assembly shell 5521, the outer ring of the rolling bearing 5523 is fixedly connected to the circumferential inner wall of the assembly shell 5521, and the inner ring of the rolling bearing 5523 is fixedly connected to the circumferential outer edge of the counterweight flywheel 5522, which is used to rotatably assemble the counterweight flywheel 5522 in the inner cavity of the assembly shell 5521; the second magnet 5524 is fixedly arranged on the counterweight flywheel 5522. Inside the heavy flywheel 5522, the second magnets 5524 in any adjacent pair of flywheel mechanisms 552 repel each other, and in the flywheel mechanism 552 adjacent to the second friction plate 542, the second magnet 5524 and the first magnet 541 repel each other, to ensure that when the electromagnet 511 is not energized, the second friction plate 542 does not contact the brake pad 55222 of the counterweight flywheel 5522, and the brake pads 55222 of the counterweight flywheels 5522 of adjacent flywheel mechanisms 552 do not contact each other.

[0083] Preferably, Figures 1 to 3 As shown, the counterweight flywheel 5522 includes: a flywheel body 55223 whose circumferential outer edge is fixedly connected to the inner ring of the rolling bearing 5523, and a first assembly hole 55221 is located at the center of the flywheel body 55223; a pair of brake pads 55222 fixedly arranged on the flywheel body 55223, one of the brake pads 55222 is located on the side wall of the flywheel body 55223 facing the second friction plate 542, and the other brake pad 55222 is located on the side wall of the flywheel body 55223 facing away from the second friction plate 542.

[0084] Further, if Figures 1 to 4As shown, the driving module includes: a motor stator 61, which is fixedly arranged on the circumferential inner wall of the shell body 1; a motor rotor 62, which is fixedly sleeved on the driving shaft 2, and the position of the motor rotor 62 matches that of the motor stator 61, and is used to drive the driving shaft 2 to rotate; a heat dissipation component, which is arranged on the driving shaft 2, and is used to promote the flow of air in the inner cavity of the shell body 1.

[0085] When the equipment is running, the head end of the driving shaft 2 is plugged into the second assembly countersunk hole 533 of the transmission sleeve 4, the tail end of the output shaft 3 is plugged into the first assembly countersunk hole 531 of the transmission sleeve 4, the reset spring 532 is in an extended state, and the motor rotor 62 drives the driving shaft 2 to rotate under the drive of the motor stator 61. The driving shaft 2 is transmitted through the transmission sleeve 4 and then drives the output shaft 3 to rotate synchronously, so as to achieve the purpose of using the output shaft 3 to drive the equipment to operate.

[0086] During the braking process of the motor, first, the motor stator 61 is powered off to stop driving the motor rotor 62, so that the driving shaft 2, the transmission sleeve 4 and the output shaft 3 can rotate freely. Then, the electromagnet 511 is energized to generate a magnetic field. The electromagnet 511 and the first magnet 541 repel each other, thereby driving the first magnet 541 to drive the transmission protrusion 54 and the transmission sleeve 4 to slide a certain distance toward the head end of the output shaft 3 until the head end of the driving shaft 2 is disengaged from the transmission section 5331 of the second assembly countersunk hole 533, and the reset spring 532 is completely compressed. In this embodiment, the first magnet 541 is driven by the magnetic force of the electromagnet 511 to drive the transmission protrusion 54 and the transmission sleeve 4 to move toward the head end of the output shaft 3, so that the head end of the driving shaft 2 is disengaged from the transmission section 5331 of the second assembly countersunk hole 533, thereby cutting off the torque transmission between the driving shaft 2 and the output shaft 3. This design makes it unnecessary to overcome the rotational inertia of the driving shaft 2 when the brake module acts on the output shaft 3, significantly reducing the energy loss during the motor braking process, thereby achieving the energy-saving effect of the motor; in the process of the transmission protrusion 54 driving the transmission shaft sleeve 4 to slide toward the head end of the output shaft 3, the assembly shells 5521 of the several flywheel mechanisms 552 gradually slide toward the head end of the output shaft 3 along the guidance of the several first guide rails 551, until the assembly shells 5521 of the flywheel mechanism 552 close to the first friction plate 521 contacts the anti-collision head of the hydraulic buffer 553, and the assembly shell 5521 stops sliding, and then the counterweight flywheels 5522 of the several flywheel mechanisms 552 approach each other, and the brake pads 55222 of the counterweight flywheels 5522 of the flywheel mechanisms 552 contact each other, and relative friction occurs. At this time, the second friction plate 542 arranged on the transmission protrusion 54 and the brake pad 5522 of the counterweight flywheel 5522 of the flywheel mechanism 552 222 contacts, and blocks the first assembly hole 55221 of the counterweight flywheel 5522, so that the counterweight flywheel 5522 rotates with the output shaft 3 driven by the second friction plate 542, thereby achieving the purpose of adding load to the output shaft 3 and increasing the rotational resistance of the output shaft 3, so as to achieve the effect of braking the output shaft 3; after the anti-collision head of the hydraulic buffer 553 contacts the assembly housing 5521, as the transmission protrusion 54 and the transmission shaft sleeve 4 further slide, the hydraulic buffer 553 is gradually compressed until the brake pad 55222 of the counterweight flywheel 5522 contacts the first friction plate 521, and the hydraulic buffer 553 stops being compressed. After the brake pad 55222 of the counterweight flywheel 5522 contacts the first friction plate 521, the first friction plate 521 frictionally brakes the counterweight flywheel 5522, thereby achieving the purpose of further increasing the rotational resistance of the output shaft 3, so as to achieve the effect of further braking the output shaft 3;.

[0087] Embodiment 2

[0088] like Figures 1 to 4As shown, this embodiment provides a brushless motor, which further discloses a heat dissipation component on the basis of the first embodiment. The heat dissipation component includes: a fan blade 631, which is fixedly mounted on the driving shaft 2; a plurality of third heat dissipation holes 632, which are opened on the outer wall of the shell body 1, and any third heat dissipation hole 632 is connected to the cavity between the motor stator 61 and the tail end of the driving shaft 2.

[0089] When the device is running, the driving shaft 2 drives the fan blades 631 to rotate, thereby prompting the external air to flow into the inner cavity of the shell body 1 through the first heat dissipation hole, and then flow out of the inner cavity of the shell body 1 through the third heat dissipation hole 632. In this process, the air flow is used to dissipate the heat generated during the operation of the device to achieve the purpose of heat dissipation of the device.

[0090] Embodiment 3

[0091] like Figures 1 to 3 , 5, this embodiment provides a brushless motor, which further discloses the brake module on the basis of the first embodiment, and the brake module further comprises: a piston cylinder 633, which is fixedly arranged on the circumferential inner wall of the housing body 1, the piston cylinder 633 is a hollow circular tube, and the axis of the piston cylinder 633 is colinear with the axis of the driving shaft 2; an actuator piston 634, which is movably arranged in the inner cavity of the piston cylinder 633, and the closest distance between the circumferential side wall of the actuator piston 634 and the circumferential inner wall of the piston cylinder 633 is greater than zero, so as to reduce the actuator piston 634 along the piston cylinder 633. The resistance encountered during the axial reciprocating displacement, preferably, the gap width between the circumferential side wall of the actuator piston 634 and the circumferential inner wall of the piston cylinder 633 ranges from 2mm to 5mm; the reciprocating transmission mechanism is arranged inside the shell body 1, and the reciprocating transmission mechanism connects the driving shaft 2 and the actuator piston 634, and is used to drive the actuator piston 634 to slide back and forth along the axial direction of the piston cylinder 633; ​​a plurality of second heat dissipation holes 635 are opened on the outer wall of the shell body 1, and any second heat dissipation hole 635 is connected to the cavity between the motor stator 61 and the tail end of the driving shaft 2.

[0092] Further, if Figure 5 , 6As shown, the reciprocating transmission mechanism includes: a reciprocating screw 6361, which is arranged in the inner cavity of the shell body 1; a second assembly hole (not shown in the figure), which is arranged on the reciprocating screw 6361, and the reciprocating screw 6361 is rotatably sleeved on the driving shaft 2 through the second assembly hole, and the axis of the reciprocating screw 6361 is colinear with the axis of the driving shaft 2; a slider 6365, which is fixedly arranged on the execution piston 634, and the slider 6365 cooperates with the reciprocating screw 6361. As the reciprocating screw 6361 rotates, the slider 6365 slides back and forth along the axial direction of the reciprocating screw 6361, and is used to drive the execution piston 634 along the piston cylinder 63 3's axial sliding; a planetary gear transmission unit 6364, which is arranged on the shell body 1, and the planetary gear transmission unit 6364 connects the driving shaft 2 and the reciprocating screw 6361, and is used to drive the reciprocating screw 6361 to rotate; a plurality of guide members 6362, which are fixedly arranged on the circumferential outer edge of the actuator piston 634; a plurality of second guide rails 6363, which are fixedly arranged on the circumferential inner wall of the piston cylinder 633, any one of the second guide rails 6363 is arranged along the axial direction of the piston cylinder 633, and the plurality of second guide rails 6363 are respectively slidably connected with a plurality of guide members 6362, and are used to circumferentially limit the actuator piston 634.

[0093] Further, if Figure 5 , 6 As shown, the planetary gear transmission unit 6364 includes: a driving gear 63641, which is fixedly sleeved on the driving shaft 2, the axis of the driving gear 63641 is colinear with the axis of the driving shaft 2, and the driving gear 63641 rotates synchronously with the driving shaft 2; an inner ring gear 63642, which is fixedly arranged on the circumferential inner wall of the shell body 1, and the axis of the inner ring gear 63642 is colinear with the axis of the driving shaft 2; a plurality of driven gears 63643, which are movably arranged in the inner cavity of the inner ring gear 63642, and any driven gear 63643 is meshed with the driving gear 63641 and the inner ring gear 63642 at the same time; a planetary carrier 63644 having a plurality of first connecting ends respectively rotatably connected to a plurality of driven gears 63643, and a second connecting end of the planetary carrier 63644 is fixedly connected to the reciprocating screw rod 6361, so as to drive the reciprocating screw rod 6361 to rotate.

[0094] When the equipment is running, the driving shaft 2 drives the driving gear 63641 to rotate, and then uses the driving gear 63641 to drive a number of driven gears 63643 to revolve around the driving gear 63641, and finally realizes the purpose of using a number of driven gears 63643 to drive the planetary carrier 63644 to rotate. During the rotation of the planetary carrier 63644, the planetary carrier 63644 drives the reciprocating screw rod 6361 to rotate, and the reciprocating screw rod 6361 is used to drive the slider 6365 and the actuator piston 634 to slide back and forth along the axial direction of the piston cylinder 633. When the equipment is in an unbraked state, air mainly flows through the first assembly hole 55221 of the counterweight flywheel 5522 Into or out of the cavity between the second friction plate 542 and the actuator piston 634, when the device is in a braked state, the first assembly hole 55221 of the counterweight flywheel 5522 of the flywheel mechanism 552 adjacent to the second friction plate 542 is blocked by the second friction plate 542, and the displacement resistance of the actuator piston 634 is increased, thereby achieving the purpose of braking the driving shaft 2; secondly, in the process of the actuator piston 634 moving back and forth along the axial direction of the piston cylinder 633, the air in the cavity on both sides of the actuator piston 634 in the shell body 1 can be exchanged with the outside air through the second heat dissipation hole 635 and the first heat dissipation hole 554, respectively, thereby enhancing the heat dissipation effect of the device.

[0095] Above, refer to Figures 1 to 6 A brushless motor according to an embodiment of the present invention is described, having the following

[0096] Beneficial effects:

[0097] 1. The device outputs the power of the device by adopting a split-structured driving shaft 2, a transmission shaft sleeve 4 and an output shaft 3, and brakes the device by adopting a braking module to brake the transmission shaft sleeve 4, which effectively improves the technical problem in the prior art that the motor shaft is easily seriously worn and the motor shaft needs to be frequently replaced, resulting in high motor maintenance costs.

[0098] 2. The device outputs the power of the device by using a split-structured driving shaft 2, a transmission sleeve 4 and an output shaft 3. When the brake module brakes the device, the drive sleeve 4 is driven to slide toward the head end of the output shaft 3, so that the head end of the driving shaft 2 is separated from the transmission section 5331 of the second assembly countersunk hole 533, thereby cutting off the torque transmission between the driving shaft 2 and the output shaft 3. This design makes it unnecessary to overcome the rotational inertia of the driving shaft 2 when the brake module acts on the output shaft 3, significantly reducing the energy loss during the motor braking process, thereby achieving the energy saving effect of the motor.

[0099] 3. The equipment adopts multiple flywheel mechanisms 552. Before the first friction plate 521 performs friction braking on the brake pad 55222 of the counterweight flywheel 5522, the load of the counterweight flywheel 5522 of the multiple flywheel mechanisms 552 is applied to the transmission shaft sleeve 4 to reduce the rotational kinetic energy of the output shaft 3, thereby extending the service life of consumable accessories such as the first friction plate 521, the second friction plate 542 and the brake pad 55222 on the counterweight flywheel 5522, thereby further reducing the maintenance cost of the equipment.

[0100] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0101] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A brushless motor, characterized in that: Include: Shell body; A driving shaft having a rear end rotatably connected to the housing body; Rotating an output shaft disposed on the housing body, wherein the axis of the output shaft is colinear with the axis of the driving shaft, and the head end of the output shaft is connected to an external actuator to drive the actuator to rotate; A transmission shaft sleeve, sleeved on the driving shaft and the output shaft, and used to drive the output shaft to rotate synchronously with the driving shaft; The driving module is arranged on the housing body, and the driving module is connected to the driving shaft and is used to drive the driving shaft to rotate; A brake module is arranged on the shell body, and the brake module is connected to the transmission sleeve and is used for braking the transmission sleeve.

2. A brushless motor as claimed in claim 1, characterized in that: The brake module comprises: A bearing bracket, fixedly arranged on the inner wall of the shell body, and the bearing bracket is rotatably connected to the driving shaft; An electromagnet, fixedly arranged on the supporting bracket; An assembly bracket, fixedly arranged on the inner wall of the shell body; A first friction plate, fixedly arranged on the assembly bracket; An encoder is arranged on the assembly bracket, the encoder is connected to the output shaft and is used to detect the rotation speed of the output shaft; An assembly component is arranged on the transmission sleeve, the assembly component is connected to the driving shaft and the output shaft, and is used for slidingly assembling the transmission sleeve on the driving shaft and the output shaft; A transmission bump, fixedly disposed on the transmission sleeve, and used to drive the transmission sleeve to slide along the axial direction of the output shaft; A first magnet is fixedly disposed on the transmission protrusion, and the position of the first magnet corresponds to that of the electromagnet; A second friction plate, fixedly disposed on the transmission lug; A load component is arranged in the inner cavity of the shell body and is used for braking the transmission cam.

3. A brushless motor as claimed in claim 2, characterized in that: The assembly components include: A first assembly countersunk hole is arranged inside the transmission sleeve, a port of the first assembly countersunk hole is located at the head end face of the transmission sleeve, the tail end of the output shaft is movably plugged into the first assembly countersunk hole, the inner cavity shape of the first assembly countersunk hole is a prism, and the first assembly countersunk hole matches the radial cross-sectional shape of the tail end of the output shaft; A return spring is arranged inside the first assembly countersunk hole, and two ends of the return spring are respectively connected to the output shaft and the inner wall of the first assembly countersunk hole, and is used for elastically supporting the transmission sleeve; A second assembly countersunk hole is arranged inside the transmission sleeve, the port of the second assembly countersunk hole is located at the tail end surface of the transmission sleeve, and the head end of the driving shaft is movably plugged into the second assembly countersunk hole; The second assembly countersunk hole is composed of a transmission section and an assembly section, the transmission section is located between the assembly section and the first assembly countersunk hole, the inner cavity shape of the transmission section is a prism, the transmission section matches the radial cross-sectional shape of the head end of the active shaft, the inner cavity shape of the assembly section is a cylinder, the maximum inner diameter of the transmission section is equal to the inner diameter of the assembly section, and when the reset spring is in an extended state, the head end of the active shaft is movably connected to the transmission section.

4. A brushless motor as claimed in claim 2, characterized in that: The load component comprises: A plurality of first guide rails are fixedly arranged on the circumferential inner wall of the shell body, and any one of the first guide rails guides along the axial direction of the shell body; A plurality of flywheel mechanisms are arranged in the inner cavity of the housing body, any one of the flywheel mechanisms is connected to the plurality of first guide rails, the plurality of flywheel mechanisms are arranged in sequence along the axial direction of the housing body, and the plurality of flywheel mechanisms are located between the second friction plate and the first friction plate; A plurality of hydraulic buffers are fixedly arranged on the inner wall of the housing body, the plurality of hydraulic buffers are located on the circumferential outer side of the assembly bracket, and the plurality of hydraulic buffers correspond to the position of one of the flywheel mechanisms; A plurality of first heat dissipation holes are provided on the outer wall of the shell body, and any one of the first heat dissipation holes is connected to the cavity between the plurality of flywheel mechanisms and the first friction plate.

5. A brushless motor as claimed in claim 4, characterized in that: The flywheel mechanism comprises: an assembly housing, movably disposed in the inner cavity of the housing body, the assembly housing being slidably connected to the plurality of first guide rails, the assembly housing being disposed along the radial direction of the housing body, the circumferential outer wall of the assembly housing being in contact with the circumferential inner wall of the housing body, and in the flywheel mechanism adjacent to the first friction plate, the assembly housing corresponds to the position of the plurality of hydraulic buffers; A counterweight flywheel is arranged in the inner cavity of the assembly housing along the radial direction of the assembly housing, the transmission sleeve passes through the first assembly hole of the counterweight flywheel, and the axis of the counterweight flywheel is colinear with the axis of the transmission sleeve; A rolling bearing is arranged in the inner cavity of the assembly shell along the radial direction of the assembly shell, the outer ring of the rolling bearing is fixedly connected to the circumferential inner wall of the assembly shell, and the inner ring of the rolling bearing is fixedly connected to the circumferential outer edge of the counterweight flywheel, and is used to rotatably assemble the counterweight flywheel in the inner cavity of the assembly shell; The second magnet is fixedly arranged inside the counterweight flywheel. The second magnets in any adjacent pair of the flywheel mechanisms repel each other. In the flywheel mechanism adjacent to the second friction plate, the second magnet and the first magnet repel each other.

6. A brushless motor as claimed in claim 2, characterized in that: The brake module also includes: A piston cylinder is fixedly arranged on the circumferential inner wall of the housing body, the piston cylinder is a hollow circular tube, and the central axis of the piston cylinder is colinear with the central axis of the driving shaft; An actuator piston is movably disposed in the inner cavity of the piston cylinder, and the closest distance between the circumferential side wall of the actuator piston and the circumferential inner wall of the piston cylinder is greater than zero; A reciprocating transmission mechanism is arranged inside the housing body, the reciprocating transmission mechanism connects the driving shaft and the actuator piston, and is used to drive the actuator piston to slide back and forth along the axial direction of the piston cylinder; A plurality of second heat dissipation holes are provided on the outer wall of the shell body, and any one of the second heat dissipation holes is connected to the cavity between the motor stator and the rear end of the driving shaft.

7. A brushless motor as claimed in claim 8, characterized in that: The reciprocating transmission mechanism comprises: a reciprocating screw rod, which is arranged in the inner cavity of the shell body; A second assembly hole is provided on the reciprocating screw rod, the reciprocating screw rod is rotatably sleeved on the driving shaft through the second assembly hole, and the central axis of the reciprocating screw rod is colinear with the central axis of the driving shaft; A slider, fixedly arranged on the actuator piston, the slider cooperates with the reciprocating screw rod to drive the actuator piston to slide along the axial direction of the piston cylinder; A planetary gear transmission unit, disposed on the housing body, the planetary gear transmission unit connects the driving shaft and the reciprocating screw rod, and is used to drive the reciprocating screw rod to rotate; A plurality of guide members are arranged on the circumferential outer edge of the actuator piston; A plurality of second guide rails are fixedly arranged on the circumferential inner wall of the piston cylinder, any one of the second guide rails is arranged along the axial direction of the piston cylinder, and the plurality of second guide rails are respectively slidably connected to the plurality of guide members for circumferentially limiting the actuator piston.

8. A brushless motor as claimed in claim 9, characterized in that: The planetary gear transmission unit comprises: A driving gear, fixedly sleeved on the driving shaft, the central axis of the driving gear is colinear with the central axis of the driving shaft, and the driving gear rotates synchronously with the driving shaft; An inner gear ring is fixedly arranged on the circumferential inner wall of the housing body, and the central axis of the inner gear ring is colinear with the central axis of the driving shaft; A plurality of driven gears are movably arranged in the inner cavity of the inner gear ring, and any one of the driven gears is meshed with the driving gear and the inner gear ring at the same time; A plurality of first connection ends are respectively connected to the plurality of driven gears for rotation by a planet carrier, and a second connection end of the planet carrier is fixedly connected to the reciprocating screw rod for driving the reciprocating screw rod to rotate.

9. A brushless motor as claimed in claim 1, characterized in that: The driving module comprises: A motor stator is fixedly arranged on the circumferential inner wall of the housing body; A motor rotor, fixedly sleeved on the driving shaft, the motor rotor matches the position of the motor stator, and is used to drive the driving shaft to rotate; The heat dissipation component is arranged on the driving shaft and is used to promote the air flow in the inner cavity of the shell body.

10. A brushless motor as claimed in claim 6, characterized in that: The heat dissipation component comprises: A plurality of fan blades are fixedly sleeved on the driving shaft, and the plurality of fan blades are sequentially arranged along the axial direction of the driving shaft; A plurality of third heat dissipation holes are provided on the outer wall of the shell body, and any one of the third heat dissipation holes is connected to the cavity between the motor stator and the rear end of the driving shaft.

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