A brushless motor

Abstract

The present invention relates to the field of motor technology, and in particular to a brushless motor, comprising: a driving shaft having a rear end rotatably connected to a housing body; an output shaft rotatably disposed on the housing body, the axis of the output shaft being collinear with the axis of the driving shaft, the head end of the output shaft being connected to an external actuator for driving the actuator to rotate; a transmission sleeve, sleeved on the driving shaft and the output shaft, for driving the output shaft to rotate synchronously with the driving shaft; a drive module disposed on the housing body, the drive module being connected to the driving shaft for driving the driving shaft to rotate; and a brake module disposed on the housing body, the brake module being connected to the transmission sleeve for braking the transmission sleeve. The present invention effectively improves the technical problem of high motor maintenance costs in the prior art by adopting a split-structure driving shaft, transmission sleeve, and output shaft to output the power of the device.

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 (Brushless Motor) is a high-efficiency electric motor that uses electronic commutation technology. It replaces the mechanical brushes and commutator structure of a traditional brushed motor with a built-in controller, and uses the electromagnetic interaction between the permanent magnet rotor and stator winding to achieve power output.

[0003] In the prior art, brushless motors generally use friction braking to brake the motor output shaft. For example, Chinese utility model patent No. CN208112391U proposes a speed-controlled brushless motor comprising a motor body, a motor housing, a motor shaft mounted on the motor body via a bearing, a brake end cap mounted on the right side of the motor housing via a snap-in and bolted fastening, a motor shaft bearing mounted within a mounting groove within the brake end cap, the motor shaft extending through a through-hole in the middle of the motor shaft bearing, and a brake mounted within the brake end cap, the motor shaft extending through a through-hole in the middle of the brake. During braking, this motor utilizes a brake mounted on its shaft to frictionally brake the motor shaft, thereby meeting the need 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 braking, the motor shaft is easily severely worn. In daily use, the motor shaft is easily severely worn, and the motor shaft needs to be frequently replaced, resulting in a high motor maintenance cost. Secondly, due to the characteristics of 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] To address the technical problem in the prior art that the motor shaft is easily severely worn during daily use, requiring frequent replacement of the motor shaft and 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 tail end rotatably connected to the housing body;

[0008] An output shaft is rotated on the housing body, wherein the central axis of the output shaft is collinear 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 is connected to the driving shaft 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 to the driving shaft;

[0014] The electromagnet is fixedly mounted on the supporting bracket;

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

[0016] A first friction plate is fixedly mounted on the assembly bracket;

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

[0018] An assembly component is provided 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 bump 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 mounted 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 protrusion.

[0023] Furthermore, the assembly components include:

[0024] A first assembly countersunk hole is provided inside the transmission sleeve, the 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 prismatic body, 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 disposed inside the first assembly countersunk hole, with both ends of the return spring being connected to the output shaft and the inner wall of the first assembly countersunk hole respectively, for elastically supporting the transmission sleeve;

[0026] The second assembly countersunk hole is provided inside the transmission sleeve, the end 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;

[0027] The second assembly countersunk hole consists 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 to the transmission section.

[0028] Furthermore, the load component includes:

[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 disposed 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 sequentially disposed 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 mounted on the inner wall of the housing body, the plurality of hydraulic buffers are located circumferentially outside 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 provided 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 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 radially along the housing body, the circumferential outer wall of the assembly housing being in contact with the circumferential inner wall of the housing body, and the assembly housing corresponding to positions of the plurality of hydraulic buffers in the flywheel mechanism adjacent to the first friction plate;

[0035] The counterweight flywheel is movably 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 central axis of the counterweight flywheel is collinear with the central axis of the transmission sleeve;

[0036] A rolling bearing is disposed 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 shell body. The piston cylinder is a hollow circular tube. The central axis of the piston cylinder is collinear with the central axis of the driving shaft.

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

[0041] A reciprocating transmission mechanism is provided 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 provided 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 tail end of the driving shaft.

[0043] Furthermore, the reciprocating transmission mechanism includes:

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

[0045] The second assembly hole is provided on the reciprocating screw rod, and 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 collinear with the central axis of the driving shaft;

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

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

[0048] A plurality of guide members are provided 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 to a plurality of guide members for circumferentially limiting the actuator piston.

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

[0051] The driving gear is fixedly sleeved on the driving shaft, the central axis of the driving gear is collinear 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 collinear 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] The first connection ends of the planetary carriers are respectively connected to the driven gears for rotation, and the second connection ends of the planetary carriers are 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. The position of the motor rotor matches that of the motor stator and is used to drive the driving shaft to rotate.

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

[0059] Furthermore, the heat dissipation component includes:

[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 provided 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 tail 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-structure 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 existing technology that the motor shaft is easily severely worn and needs to be frequently replaced, resulting in high motor maintenance costs.

[0064] 2. This device outputs power through a split-structure drive shaft, drive sleeve, and output shaft. When the brake module brakes the device, the drive sleeve slides toward the output shaft head, disengaging the drive shaft head from the transmission section of the second assembly countersunk hole, thereby severing torque transmission between the drive and output shafts. This design eliminates the need to overcome the drive shaft's rotational inertia when the brake module acts on the output shaft, significantly reducing energy loss during motor braking and ultimately achieving energy savings.

[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 This is a schematic diagram of the assembly of a brake module according to the first embodiment of the present invention;

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

[0069] Figure 3 A schematic diagram of the structure of an assembly according to an embodiment of the present invention is shown in exploded form (the transmission sleeve is shown in perspective);

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

[0071] Figure 5 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 accompanying 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-return 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 blade, 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-planet carrier, 6365-slider. DETAILED DESCRIPTION

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

[0076] The foregoing and other technical aspects, features, and benefits of the present invention will be more clearly understood in the following detailed description of the embodiments, which is accompanied by reference to the accompanying drawings. Directional terms such as up, down, left, right, front, and back, used in the following embodiments, are merely references to the accompanying drawings. Therefore, the directional terms used are for illustrative purposes only and are not intended to limit the present invention. Furthermore, identical reference numerals throughout the embodiments denote identical elements.

[0077] Example 1

[0078] Specifically, if Figure 1 As shown, this embodiment provides a brushless motor, comprising: a shell body 1; a driving shaft 2 rotatably connected to the shell body 1 at its tail end; an output shaft 3 rotatably arranged on the shell body 1, the axis of the output shaft 3 is collinear with the axis of the driving shaft 2, and the head end of the output shaft 3 is connected to an external actuator device for driving the actuator device 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 and the driving shaft 2 to rotate synchronously; 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 braking module includes: a bearing bracket 51, which is fixedly arranged on the inner wall of the shell body 1 and 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 is connected to the output shaft 3 for detecting the speed of the output shaft 3; an assembly component, which is arranged on the transmission sleeve 4, 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 bump 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 bump 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 bump 54; and a load component, which is arranged in the inner cavity of the shell body 1 and is used to brake the transmission bump 54.

[0080] Further, if Figures 1-3 As shown, the assembly component includes: a first assembly countersunk hole 531, which is arranged inside the transmission sleeve 4, and the port of the first assembly countersunk hole 531 is located at the head end face of the transmission 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 sleeve 4; a second assembly countersunk hole 533, which is arranged inside the transmission sleeve 4, and the port of the second assembly countersunk hole 533 is located at the transmission 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 return 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 1-3As 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 first guide rail 551 guides 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 flywheel mechanism 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 are opened on the outer wall of the shell body 1, and any first heat dissipation hole 554 is connected to the cavity between the plurality of flywheel mechanisms 552 and the first friction plate 521.

[0082] Further, if Figures 1-3As 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 to 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. The gap width between them is such that when air flows inside the housing body 1, the air flow mainly flows 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 position 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 collinear 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, for rotatably assembling 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 1-3 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 drive 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 the position 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 return 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 execution of the equipment operation.

[0086] During the braking process of the motor, first, the motor stator 61 is powered off, and the motor rotor 62 is stopped from being driven, so that the driving shaft 2, the transmission sleeve 4 and the output shaft 3 rotate freely. Then, the electromagnet 511 is energized and generates 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 return spring 532 is fully 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 for the brake module to overcome the rotational inertia of the driving shaft 2 when acting 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 set on the transmission protrusion 54 and the brake pad 55 222 contacts and blocks the first assembly hole 55221 of the counterweight flywheel 5522, so that the counterweight flywheel 5522 rotates along with the output shaft 3 under the drive of the second friction plate 542, thereby increasing the load on the output shaft 3 and increasing the rotational resistance of the output shaft 3, thereby achieving 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, thereby achieving the effect of further braking the output shaft 3;

[0087] Example 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: fan blades 631, which are 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] Example 3

[0091] like Figures 1-3 5, this embodiment provides a brushless motor, which further discloses the braking module based on the first embodiment, and the braking module further includes: 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 collinear 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 is preferably such that the width of the gap between the circumferential side wall of the actuator piston 634 and the circumferential inner wall of the piston cylinder 633 is in the range of 2 mm to 5 mm; 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) is provided on the reciprocating screw 6361, and the reciprocating screw 6361 is rotatably sleeved on the active shaft 2 through the second assembly hole, and the axis of the reciprocating screw 6361 is collinear with the axis of the active shaft 2; a slider 6365, which is fixedly provided 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, and 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 the 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 mounted on the driving shaft 2, the axis of the driving gear 63641 is collinear 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 collinear 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 simultaneously engaged with the driving gear 63641 and the inner ring gear 63642; a planetary carrier 63644, wherein a plurality of first connecting ends are 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, for driving 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 several driven gears 63643 to revolve around the driving gear 63641, and finally realizes the purpose of using several 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 6361 to rotate, and the reciprocating screw 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, the air mainly flows through the first assembly hole 55221 of the counterweight flywheel 5522 4. 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 executive piston 634 is increased, thereby achieving the purpose of braking the driving shaft 2; secondly, in the process of the executive 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 executive 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, 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, which has the following beneficial effects:

[0096] 1. This device outputs the power of the device by adopting a split-structure 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 existing technology that the motor shaft is easily severely worn and the motor shaft needs to be frequently replaced, resulting in high motor maintenance costs.

[0097] 2. This device outputs its power through a split-structure drive shaft 2, drive sleeve 4, and output shaft 3. When the brake module brakes the device, it drives the drive sleeve 4 to slide toward the head of the output shaft 3, disengaging the head of the drive shaft 2 from the transmission section 5331 of the second assembly countersunk hole 533, thereby severing the torque transmission between the drive shaft 2 and the output shaft 3. This design eliminates the need to overcome the rotational inertia of the drive shaft 2 when the brake module acts on the output shaft 3, significantly reducing energy loss during motor braking and thus achieving energy savings.

[0098] 3. This 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 this equipment.

[0099] It should be noted that, in this specification, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the elements.

[0100] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. After reading the above description, various modifications and substitutions of the present invention will become apparent to those skilled in the art. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A brushless motor, characterized in that: Include: Shell body; A driving shaft having a tail end rotatably connected to the housing body; An output shaft provided on the housing body is rotated, wherein the axis of the output shaft is collinear with the axis of the driving shaft, and the head end of the output shaft is connected to an external actuator device for driving the actuator device to rotate; A transmission shaft sleeve is sleeved on the driving shaft and the output shaft, and is used to drive the output shaft and the driving shaft to rotate synchronously; a driving module, disposed on the housing body, connected to the driving shaft and configured to drive the driving shaft to rotate; a brake module, disposed on the housing body, connected to the transmission sleeve, and configured to brake the transmission sleeve; A bearing bracket is 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, disposed on the assembly bracket, connected to the output shaft and configured to detect a rotational speed of the output shaft; An assembly component is provided 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 configured to drive the transmission sleeve to slide along the axial direction of the output shaft; a first magnet, fixedly disposed on the transmission bump, wherein the first magnet corresponds to the position of the electromagnet; a second friction plate, fixedly arranged on the transmission lug; a load assembly, disposed in the inner cavity of the housing body, for braking the transmission bump; The load components include: 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 disposed in the inner cavity of the housing body, any one of the flywheel mechanisms being connected to the plurality of first guide rails, the plurality of flywheel mechanisms being disposed sequentially along the axial direction of the housing body, and the plurality of flywheel mechanisms being located between the second friction plate and the first friction plate; a plurality of hydraulic buffers fixedly disposed on the inner wall of the housing body, the plurality of hydraulic buffers being located circumferentially outside the assembly bracket, and the plurality of hydraulic buffers corresponding 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.

2. A brushless motor as claimed in claim 1, characterized in that: The assembly components include: a first assembly countersunk hole, disposed inside the transmission sleeve, with a port of the first assembly countersunk hole located on the head end face of the transmission sleeve, the tail end of the output shaft being movably plugged into the first assembly countersunk hole, the inner cavity of the first assembly countersunk hole being prismatic in shape, and the first assembly countersunk hole matching the radial cross-sectional shape of the tail end of the output shaft; a return spring disposed inside the first assembly countersunk hole, with both ends of the return spring respectively connected to the output shaft and the inner wall of the first assembly countersunk hole, for elastically supporting the transmission sleeve; A second assembly countersunk hole is provided inside the transmission sleeve, an end of the second assembly countersunk hole is located at the tail end face 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 consists 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 return spring is in an extended state, the head end of the active shaft is movably connected to the transmission section.

3. A brushless motor as claimed in claim 1, 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 radially along the housing body, the circumferential outer wall of the assembly housing being in contact with the circumferential inner wall of the housing body, and the assembly housing corresponding to the position of the plurality of hydraulic buffers in the flywheel mechanism adjacent to the first friction plate; 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 collinear with the axis of the transmission sleeve; a rolling bearing, disposed in the inner cavity of the assembly housing along the radial direction of the assembly housing, the outer ring of the rolling bearing being fixedly connected to the circumferential inner wall of the assembly housing, and the inner ring of the rolling bearing being fixedly connected to the circumferential outer edge of the counterweight flywheel, for rotatably assembling the counterweight flywheel in the inner cavity of the assembly housing; 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.

4. A brushless motor as claimed in claim 1, characterized in that: The brake module further comprises: A piston cylinder is fixedly arranged on the circumferential inner wall of the housing body, wherein the piston cylinder is a hollow circular tube, and the central axis of the piston cylinder is collinear with the central axis of the driving shaft; an actuator piston movably disposed in the inner cavity of the piston cylinder, wherein 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, disposed inside the housing body, the reciprocating transmission mechanism connecting the driving shaft and the actuator piston, and configured 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 tail end of the driving shaft.

5. A brushless motor as claimed in claim 4, characterized in that: The reciprocating transmission mechanism comprises: A reciprocating screw rod 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 collinear with the central axis of the driving shaft; A slider is fixedly provided on the actuator piston, and cooperates with the reciprocating screw 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 connecting the driving shaft and the reciprocating screw to drive the reciprocating screw to rotate; A plurality of guide members are provided 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, and any one of the second guide rails is arranged along the axial direction of the piston cylinder. The plurality of second guide rails are respectively slidably connected to the plurality of guide members for circumferentially limiting the actuator piston.

6. A brushless motor as claimed in claim 5, characterized in that: The planetary gear transmission unit comprises: A driving gear is fixedly sleeved on the driving shaft, the central axis of the driving gear is collinear 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 collinear 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 of the planetary carrier are respectively connected to the plurality of driven gears for rotation, and a second connection end of the planetary carrier is fixedly connected to the reciprocating screw rod for driving the reciprocating screw rod to rotate.

7. A brushless motor as claimed in claim 1, characterized in that: The driving module includes: a motor stator, 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 flow of air in the inner cavity of the shell body.

8. A brushless motor as claimed in claim 7, 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 tail end of the driving shaft.

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