CN219938175U - Large-torque dustproof outer rotor brushless direct current motor with Hall control function - Google Patents

Abstract

The utility model discloses a high-torque dustproof outer rotor brushless direct current motor with Hall control, which is characterized in that a rotating block is arranged at the center of a top cover and is connected with an output shaft, a first bearing is arranged between the output shaft and a bottom cover, a stator is arranged at the outer side of the output shaft in a cylinder, a magnet is arranged at the outer side of the stator in the cylinder, a second bearing is arranged between the output shaft and the stator, a rotor is uniformly arranged at the outer side of the stator at the lower end face of the top cover, the upper end of the side face of the rotor is connected with the top cover through a reinforcing screw, the upper end and the lower end of the magnet are connected with the top cover and the bottom cover through magnet fasteners, straight edge positions are arranged at the two sides of the upper end of the output shaft and are clamped with the rotating block, a dustproof net is arranged on one surface opposite to the top cover and the bottom cover, three Hall elements are arranged at the outer side of the upper end of the stator, and included angles between the three Hall elements are 120 degrees. The utility model has the advantages that: the motor has stable running, long service life, less entry of dust and other foreign matters, and can collect motor information better.

Description

Large-torque dustproof outer rotor brushless direct current motor with Hall control function

Technical Field

The utility model relates to the technical field of motors, in particular to a high-torque dustproof outer rotor brushless direct current motor with Hall control.

Background

The outer rotor brushless motor with the diameter of 40mm-100mm with Hall control on the market is designed in a direct closed structure and milling holes of an upper end cover and a lower end cover, the Hall control and coil temperature induction are not installed, and dust and foreign matters cannot be prevented from entering the motor to cause motor damage; in structural design, the problems that dust or foreign matters are adsorbed into the motor to cause damage and rejection of the motor during operation of the motor, the motor cannot be better provided with driving performance due to no Hall induction, the motor can be blocked, the operation is not smooth, the response speed is low and the like are solved; by collecting Hall signals and using FOC control, the motor can respond better and more accurately during the control of the throttle, and the response precision and efficiency of the motor are improved; the bearing adopts traditional steel shield assembly clearance big precision not high, causes the bearing fragile easily to advance foreign matter such as grit dust, causes the motor to generate heat and motor efficiency reduction burn scheduling problem.

Disclosure of Invention

The utility model aims to solve the technical problems, and provides the high-torque hall-controlled dustproof outer rotor brushless direct current motor which is stable in motor operation, long in service life, difficult to enter foreign matters such as dust and the like and capable of better acquiring motor information.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the utility model provides a big moment of torsion takes hall control brushless direct current motor of dustproof external rotor, includes casing, output shaft, stator and magnet, the casing includes barrel, top cap and bottom, both ends are connected with top cap and bottom cooperation respectively about the barrel, top cap center rotates there is the rotor, rotor and output shaft, the output shaft lower extreme exposes the bottom, be equipped with bearing one between output shaft and the bottom, the output shaft outside is equipped with the stator in the barrel, the stator outside is equipped with magnet in the barrel, be equipped with bearing two between output shaft and the stator, the terminal surface stator outside evenly is equipped with the rotor under the top cap, rotor side upper end is connected with the top cap through the reinforcement screw, magnet upper and lower both ends are connected with top cap and bottom through magnet fastener, output shaft upper end both sides are equipped with the straight flange position, straight flange position and rotor joint, be equipped with the dust screen on the opposite one side of top cap and bottom, the stator upper end outside is equipped with hall element, hall element has three, three contained angle between the hall element is 120 °

Furthermore, the rotor adopts neodymium iron boron strong magnetic steel.

Further, the stator is formed by laminating 0.2mm silicon steel sheets, and the lamination coefficient reaches 0.998.

Further, high temperature resistant and strong adhesive glue is coated between the magnet and the cylinder.

Further, two bearings are arranged, four bearings are arranged, and ball bearings are adopted for the first bearing and the second bearing.

Further, a gasket and a snap spring are arranged at the joint of the output shaft and the bottom cover.

Further, a temperature sensing device is arranged in the coil on the stator.

Compared with the prior art, the utility model has the advantages that:

1. the upper end of the side face of the rotor is connected with the top cover through a reinforcing screw, so that the rotor cannot fall off under any impact or severe load condition, straight edge positions are arranged on two sides of the upper end of the output shaft and are clamped with the rotating block, the axial and radial movement of the motor cannot be guaranteed, the motor shaft falling risk is avoided, the magnet is bonded on the inner wall of the cylinder body through high-temperature-resistant strong adhesive water, the magnet is connected with the top cover and the bottom cover through a magnet fastener, the motor magnet cannot fall off, the motor is prevented from being damaged, and the service life of the motor is guaranteed;

2. three Hall elements are uniformly arranged on the stator at 120 degrees, so that the acquisition stability of Hall signals and the stable response stability and efficiency stability of the motor are better ensured, the rotor adopts neodymium iron boron strong magnetic steel, and the output power and the efficiency of the motor are increased.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a top view of the stator of the present utility model.

Reference numerals: 1. the device comprises an output shaft, 2, a stator, 3, a magnet, 4, a cylinder, 5, a top cover, 6, a bottom cover, 7, a first bearing, 8, a second bearing, 9, a rotor, 10, a reinforcing screw, 11, a magnet fastener, 12, a straight edge position, 13, a dust screen, 14, a Hall element, 15, a gasket, 16 and a clamp spring.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indications such as up, down, left, right, front, and rear … … in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture such as that shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The utility model will now be further described with reference to the accompanying drawings.

With the combination of the attached figures 1-2, the motor uses two first bearings 7 and four second bearings 8, and the service life of the motor and the service life of the bearings are better ensured under the conditions of running under the condition of heavy load and carrying under the condition of high load.

The rotor 9 adopts neodymium iron boron strong magnetic steel, so that the output power and the efficiency of the motor are increased.

The stator 2 is formed by laminating 0.2mm silicon steel sheets, the lamination coefficient reaches 0.998, and the iron loss of the motor is effectively reduced.

The rotor 9 and the top cover 5 are uniformly distributed in 360 degrees and are locked by punching on the side surface, so that the rotor 9 cannot fall off under any impact or severe load.

Straight edge positions 12 are arranged on two sides of the upper end of the output shaft 1, and the top cover 5 is matched with the output shaft 1 by adopting clamping positions of T-shaped and two flat sides, so that the axial and radial directions of the motor are ensured not to move to cause the risk of shaft disconnection of the motor.

The magnet 3 is bonded with the cylinder 4 by adopting high-temperature-resistant strong adhesive glue, and is reinforced by using a slot clamping mode at the upper end and the lower end of the magnet 3, so that the bonding force of the magnet 3 is firmer, and the motor magnet 3 is prevented from falling off to cause motor damage.

The motor is provided with 120-degree evenly distributed grooves on the stator 2 for installing three Hall elements 14, so that the acquisition stability of Hall signals, the response stability and the efficiency stability of the motor and the like are better ensured.

The stator 2 is partially installed and the bottom cover 6 adopts a side surface groove adding mode, so that positioning teeth of the stator 2 are completely clamped, and motor damage caused by radial rotation and slipping is avoided.

The coil of the stator 2 is provided with a temperature sensing device, so that the internal temperature of the motor can be detected in real time.

The dust screen 13 is added, so that foreign matters such as sand dust more than 0.3mm can be prevented from being adsorbed into the motor, and other foreign matters such as sand dust are prevented from being adsorbed into the motor to cause motor damage.

The motor can be applied to sports equipment such as electric scooters, single-wheel scooters, athletic skateboards and the like, the maximum torque of the motor can reach 8N.M, the power can reach 6KW, and the use voltage can support 60V high voltage.

The utility model and its embodiments have been described in a non-limiting manner, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.

Claims (7)

1. The utility model provides a dustproof external rotor brushless DC motor of big moment of torsion area hall control, includes casing, output shaft (1), stator (2) and magnet (3), the casing includes barrel (4), top cap (5) and bottom (6), both ends are connected with top cap (5) and bottom (6) cooperation respectively about barrel (4), top cap (5) central authorities rotate there is the rotating block, the rotating block is connected with output shaft (1), output shaft (1) lower extreme exposes bottom (6), be equipped with bearing one (7) between output shaft (1) and bottom (6), output shaft (1) outside is equipped with stator (2) in barrel (4), be equipped with magnet (3) in the barrel (4) outside in (2), its characterized in that: the novel motor rotor is characterized in that a bearing II (8) is arranged between the output shaft (1) and the stator (2), a rotor (9) is uniformly arranged on the outer side of the stator (2) on the lower end face of the top cover (5), the upper end of the side face of the rotor (9) is connected with the top cover (5) through a reinforcing screw (10), the upper end and the lower end of the magnet (3) are connected with the top cover (5) and the bottom cover (6) through magnet fasteners (11), straight edge positions (12) are arranged on two sides of the upper end of the output shaft (1), the straight edge positions (12) are clamped with a rotating block, a dustproof net (13) is arranged on one face, opposite to the bottom cover (6), of the upper end of the stator (2), three Hall elements (14) are arranged on the outer side of the stator (2), and included angles between the three Hall elements (14) are 120 degrees.

2. The high torque hall controlled dustproof outer rotor brushless dc motor of claim 1, wherein: the rotor (9) adopts neodymium iron boron strong magnetic steel.

3. The high torque hall controlled dustproof outer rotor brushless dc motor of claim 1, wherein: the stator (2) is formed by laminating 0.2mm silicon steel sheets, and the lamination coefficient reaches 0.998.

4. The high torque hall controlled dustproof outer rotor brushless dc motor of claim 1, wherein: and high-temperature-resistant strong-adhesion glue is coated between the magnet and the cylinder.

5. The high torque hall controlled dustproof outer rotor brushless dc motor of claim 1, wherein: the first bearings (7) are arranged in two, the second bearings (8) are arranged in four, and the first bearings (7) and the second bearings (8) are ball bearings.

6. The high torque hall controlled dustproof outer rotor brushless dc motor of claim 1, wherein: a gasket (15) and a clamp spring (16) are arranged at the joint of the output shaft (1) and the bottom cover (6).

7. The high torque hall controlled dustproof outer rotor brushless dc motor of claim 1, wherein: a temperature sensing device is arranged in a coil on the stator (2).