CN218335511U

CN218335511U - Brushless motor and air pump system for vehicle seat

Info

Publication number: CN218335511U
Application number: CN202221112488.3U
Authority: CN
Inventors: 谢小五; 陈亮; 崔伟
Original assignee: Guangdong Zhaoqing L&V Co Ltd
Current assignee: Guangdong Zhaoqing L&V Co Ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2023-01-17
Anticipated expiration: 2032-05-10

Abstract

The utility model discloses a brushless motor, including stator module, rotor subassembly, shell, end cover and circuit board assembly, circuit board assembly disposes the brushless motor control chip who configures into integrative NULL. The utility model discloses still relate to an air pump system for vehicle seat, including setting up the air pump in vehicle seat and being used for driving aforementioned brushless motor of this air pump. The utility model discloses a brushless motor is except that having ordinary brushless motor long service life, PWM speed controllable, electromagnetic compatibility improves, motor noise and vibration are littleer and the advantage that efficiency is higher, still has with low costs, compact structure and the strong advantage of anti-electromagnetic interference performance.

Description

Brushless motor and air pump system for vehicle seat

Technical Field

The utility model relates to a motor field particularly, relates to a brushless motor, still relates to an air pump system for vehicle seat including this kind of brushless motor.

Background

In order to improve the riding comfort of a driver or passengers and relieve driving fatigue, the automobile seat is provided with an adjustable waist support or a lateral support system. For the electric adjustable air pump type waist support, the air pump is driven by the motor to inflate or deflate the air bags corresponding to the waist support or the lateral support system, and the adjustment purpose is achieved through the swelling and restoration of the air bags, so that better support is provided for the waist of a passenger. In addition, the automobile seat can be provided with a massage system, and the motor drives the air pump to inflate or deflate the corresponding air bag, so as to achieve the purpose of massage.

In view of the price and cost advantages of the brush motor, the common motors used for driving the air pump of the automobile seat on the market are all brush motors. The brush motor has a carbon brush structure, and the motor is kept to operate continuously by the commutation of the commutator. However, due to the wear consumption of the carbon brush, the service life of the brush motor is generally short, and the endurance failure is generally about 2000 hours. In addition, the brush motor has the defects of non-adjustable speed, poor electromagnetic compatibility (EMC), large vibration and noise, small output power and low efficiency.

The brushless motor uses the electronic commutator to replace a contact mechanical commutator and a carbon brush of the brush motor, so that the service life of the motor can be greatly prolonged, and the brushless motor has the advantages of controllable Pulse Width Modulation (PWM) speed, improved electromagnetic compatibility (EMC), less noise and vibration of the motor, higher efficiency and the like. However, since the brushless motor needs to use the controller to realize the operation of the motor, the complexity is significantly increased and the cost is correspondingly increased compared with the brush motor.

Therefore, there is a need for a low cost brushless motor in an automotive seat air pump lumbar support and massage system.

Disclosure of Invention

In order to solve the above problem, the utility model provides a brushless motor that can be used to seat air pump system, this brushless motor still have with low costs, anti-electromagnetic interference (EMI) can the reinforce and compact structure's advantage except that having ordinary brushless motor long service life, PWM speed is controllable, EMC improves, noise and vibration are littleer and efficiency is higher.

The purpose of the utility model is realized through the following technical scheme: a brushless motor comprises a stator assembly, a rotor assembly, a shell, an end cover and a circuit board assembly, wherein the circuit board assembly is provided with a brushless motor control chip.

According to an aspect of the utility model, brushless motor control chip is the integration integrated chip who collects switch circuit, soft start circuit, drive circuit and hall signal detection circuit in an organic whole. The integrated chip is used for replacing a brushless motor controller, so that the control circuit is greatly simplified, the cost of the control circuit is saved, and the structure of the motor is more compact.

According to the utility model discloses an aspect, place the brushless motor setting in the circuit board assembly to improve the anti-electromagnetic interference (EMI) performance of motor.

According to the utility model discloses an aspect, the shell is tensile shaping as an organic whole, when saving a side end cover, still can improve the axiality of bearing frame.

According to an aspect of the utility model, the shell is equipped with the fluting, circuit board assembly's power cord is drawn forth from the fluting. An elastic plug, such as a rubber plug, is arranged between the power line and the slot, and the elastic plug is provided with a hole for allowing the power line to pass through. Through setting up the elastic plug, can compress the elastic plug when motor end cover and shell assembly, make to form frictional force between elastic plug and the power cord to make the power cord have certain tensile pull-out ability.

According to the utility model discloses an aspect, elasticity stopper surface design has protruding muscle, and in assembling process, protruding muscle receives shrink behind the end cover pressure to absorb the part tolerance between end cover, elasticity stopper, the shell, avoid the condition emergence that the end cover assembly is not in place.

According to an aspect of the present invention, the brushless motor is an inner rotor or an outer rotor structure.

According to the utility model discloses an aspect, rotor assembly's rotor core includes the rotor lamination, and the rotor lamination adopts fretwork formula design, guarantees that rotor core fully walks under the piece of magnetism and rotor rigidity furthest reduces the weight of rotor.

According to one aspect of the present invention, the angle between the teeth and the crown of the stator core of the stator assembly is in the range of 115-125 degrees, preferably 120 degrees, thereby facilitating the orderly arrangement of the windings in the slots and improving the slot fullness rate.

According to an aspect of the utility model, brushless motor is arranged in driving the air pump among car seat waist holds in the palm governing system or the massage system. The circuit board assembly is integrated with an ECU (electronic control unit) circuit of the air pump system, thereby making the structure more compact.

According to the utility model discloses an aspect, brushless motor is single phase motor, stator module's stator core has asymmetric tooth crown, is favorable to realizing the motor self-starting.

According to the utility model discloses an aspect, asymmetric tooth crown divide into big tooth crown and little tooth crown along the tooth central line, for the circular arc transition between big tooth crown and the little tooth crown to make air gap magnetic field can smooth transition, be favorable to suppressing vibration noise.

According to an aspect of the present invention, the brushless motor is a single-phase motor, and 4 slots with 4 poles or 6 slots with 6 poles are adopted.

According to an aspect of the utility model, brushless motor is three-phase motor, adopts 4 utmost point 6 grooves or 8 utmost point 6 grooves.

The utility model also provides an air pump system for vehicle seat, including setting up the air pump in vehicle seat with be used for the drive aforementioned brushless motor of air pump.

The utility model discloses a brushless motor uses the controller that collects switch circuit, soft start circuit, drive circuit and hall signal detection circuit in current brushless motor of integrated chip replacement in an organic whole, reduces external circuit in the at utmost and uses, has simplified control circuit greatly, saves the control circuit cost, makes the structure of motor compacter simultaneously. Due to the reduction of the cost, the brushless motor is applied to the automobile seat air pump type waist support system or the massage system. In addition, by integrating an ECU (electronic control unit) circuit of the air pump system with a drive circuit of the brushless motor, the structure is made more compact. The utility model discloses a brushless motor is except that having ordinary brushless motor long service life, PWM speed controllable, electromagnetic compatibility improves, motor noise and vibration are littleer and the advantage that efficiency is higher, still has with low costs, compact structure and the strong advantage of anti-electromagnetic interference performance.

Drawings

Fig. 1 is a perspective view of a brushless motor according to an embodiment of the present invention;

FIG. 2 is an exploded view of the brushless electric machine of FIG. 1;

fig. 3 is a perspective view of an elastomeric plug according to an embodiment of the present invention;

fig. 4 is a perspective view of a portion of a brushless motor housing assembled with the elastomeric plug of fig. 3;

fig. 5 is a front view of a stator core of a single-phase motor according to an embodiment of the present invention;

FIG. 6 is an enlarged view of a portion of the asymmetric crown of the stator core of FIG. 5;

fig. 7 is a perspective view of a brushless motor according to an embodiment of the present invention;

fig. 8 is a perspective view of the assembly of the brushless motor and the seat air pump according to the embodiment of the present invention.

Detailed Description

The brushless electric machine according to the present invention will be described in further detail with reference to the accompanying drawings, which show, by way of example, embodiments of the present invention.

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention to a user of the art. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. Furthermore, it is to be understood that the invention is not to be limited to the specific embodiments described. Rather, any combination of the following features and elements, whether related to different embodiments or not, is contemplated to implement the present invention. Thus, the following aspects, features, embodiments and advantages are merely illustrative and should not be considered elements or limitations of the claims except where explicitly recited in a claim(s).

Referring to fig. 1 and 2, fig. 1 is a perspective view of a brushless motor according to an embodiment of the present invention, and fig. 2 is an exploded view of the brushless motor shown in fig. 1.

As shown in fig. 2, as an embodiment of the present invention, the brushless motor includes a stator assembly 1, a rotor assembly 2, a housing 3, an end cap 4, and a circuit board assembly 5, and the circuit board assembly 5 is configured with a brushless motor control chip (not shown in the figure). Although the exemplary brushless motor shown in fig. 2 is an inner rotor structure, the brushless motor of the present invention may also be an outer rotor structure.

The brushless motor control chip is an integrated chip integrating a switching circuit, a soft start circuit, a driving circuit and a Hall signal detection circuit. The utility model discloses a brushless motor uses integrated chip to replace current brushless motor's controller, and the external circuit that reduces to the utmost uses, has simplified control circuit greatly, saves the control circuit cost, makes the structure of motor compacter simultaneously.

In a specific embodiment, the circuit board assembly 5 is built in the motor. As shown in fig. 2, the circuit board assembly 5 is disposed inside the motor case 3 on the side of the end cover 4. By disposing the circuit board assembly 5 inside the motor case 3, the electromagnetic interference (EMI) resistance of the motor can be improved.

As a specific embodiment, the housing 3 of the brushless motor is integrally formed by stretching, so that only one side of the motor needs to be provided with the end cover 4, and the coaxiality of the bearing seat can be improved while the other side end cover is saved.

Referring to fig. 3 and 4, fig. 3 is a perspective view of the elastic plug 12 according to an embodiment of the present invention, and fig. 4 is a perspective view illustrating the assembly of the elastic plug 12 to the motor housing 3.

As shown in fig. 4, the motor housing 3 is provided with a slot, and the power line of the circuit board assembly 5 is led out from the slot. As a specific embodiment, an elastic plug 12, such as a rubber plug, is provided between the power cord and the slot of the housing 3. Through setting up the elastic plug 12, can compress the elastic plug 12 when motor end cover 4 assembles with shell 3, make to form frictional force between elastic plug 12 and the power cord to make the power cord have certain stretch-proofing ability of pulling out.

In a specific embodiment, the elastic plug 12 is designed with ribs. As shown in fig. 3, for example, three ribs may be provided on the upper surface of the elastic plug 12. In the assembling process, the convex ribs shrink under the pressure of the end cover 4, so that the part tolerance among the end cover 4, the elastic plug 12 and the shell 3 is absorbed, and the condition that the end cover 4 is not assembled in place is avoided.

As a specific embodiment, the rotor core of the rotor assembly 2 includes rotor laminations, and the rotor laminations adopt a hollow design, so that the weight of the rotor is reduced to the maximum extent under the condition that the rotor core is ensured to fully run magnetism and the rotor is ensured to be rigid.

In a specific embodiment, the brushless motor is a single-phase motor, and a rotor core of the single-phase motor adopts an asymmetric tooth crown structure. Referring to fig. 5 and 6, fig. 5 is a front view of a stator core of a single-phase motor according to an embodiment of the present invention, and fig. 6 is a partial enlarged view of an asymmetric tooth crown of the stator core in fig. 5.

As shown in fig. 5, as a specific example, the angle between the teeth of the stator core and the tooth crown is preferably designed to be 120 degrees, thereby facilitating the orderly arrangement of the winding in the slot and improving the slot fullness rate.

As shown in fig. 6, the stator core of the single-phase motor adopts an asymmetric crown structure, and the asymmetric crown is divided into a large crown and a small crown along the tooth center line. By adopting the design of the asymmetrical tooth crown, the motor and the pump head can still provide sufficient starting torque under extreme working conditions after being assembled, and the motor can be started automatically.

As shown in fig. 6, as a specific embodiment, the large crown and the small crown are in arc transition, and the two-segment arc transition is specifically designed, so that the air gap magnetic field can be in smooth transition, which is beneficial to suppressing vibration noise.

The utility model discloses still relate to brushless motor in the application of air pump formula waist of car seat holds in the palm governing system and massage system.

Referring to fig. 7 and 8, fig. 7 is a perspective view of a brushless motor according to an embodiment of the present invention, and fig. 8 is a perspective view of an assembly of the brushless motor and a seat air pump according to an embodiment of the present invention.

As shown in fig. 7, as a specific embodiment, a flat section is designed on the side of the rotating shaft 23 of the brushless motor, and a part of the outer circumference of the flat section has a flat profile for directly connecting with an eccentric wheel (not shown) of the air pump. And a threaded hole is formed in one side of the motor shell 3, so that the motor is connected with the air pump through a screw. Fig. 8 shows a schematic diagram of the brushless motor and the air pump according to the present invention after being assembled.

As a specific implementation manner, the driving circuit of the brushless motor of the present invention can be integrated with an ECU (electronic control unit) circuit of the air pump system, specifically, the ECU circuit of the air pump system is integrated on the circuit board assembly of the brushless motor, so that the structure of the air pump system is more compact.

In a specific embodiment, the brushless motor is a single-phase motor, and 4-pole 4-slot or 6-pole 6-slot is adopted.

In a specific embodiment, the brushless motor is a three-phase motor, and the stator core of the stator assembly adopts a symmetrical tooth type and can be a 4-pole 6-slot or an 8-pole 6-slot.

Used in an air pump type waist support adjusting system or a massage system of an automobile seatThe utility model discloses a brushless motor drive air pump compares the brush motor that uses among the prior art, and the motor is durable promotes more than 4 times, can reach about 10000 hours. The electromagnetic compatibility (EMC) of the motor meets the CISPR25 standard 5-level requirement. The PWM speed of the motor is controllable, and the noise and vibration of the motor are smaller. Noise less than 35dBA, vibration amplitude less than 2m/s in X and Y directions ² In the Z direction, is less than 1m/s ² . The motor efficiency is higher, the utility model discloses a brushless motor efficiency is 60% ~ 80%. In addition, the size of the motor is reduced, and the structure is more compact.

Although the present invention has been described with reference to the preferred embodiments, the present invention is not limited thereto. Various changes and modifications can be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention is to be determined by the appended claims.

Claims

1. The utility model provides a brushless motor, includes stator module, rotor subassembly, shell, end cover and circuit board subassembly, its characterized in that, circuit board subassembly disposes brushless motor control chip, control chip integration has switch circuit, soft start circuit, drive circuit and hall signal detection circuit, circuit board subassembly is located in the shell, the shell is tensile shaping as an organic whole.

2. The brushless electric machine of claim 1, wherein the housing is provided with a slot, an elastic plug is provided on the slot, and a power line of the circuit board assembly is led out from the elastic plug.

3. The brushless electric machine of claim 2, wherein the elastomeric plug has a rib.

4. The brushless electric machine of claim 3, wherein the rotor assembly comprises rotor laminations having openwork.

5. The brushless electric machine of claim 4, wherein the stator assembly has a stator core with teeth at an angle 115-125 degrees to a crown of the teeth.

6. The brushless electric machine of claim 5, wherein the brushless electric machine is an inner rotor or an outer rotor configuration.

7. The brushless electric machine according to any of claims 1-6, wherein the brushless electric machine is used to drive an air pump in a seat lumbar support adjustment system or a massage system.

8. The brushless electric machine of claim 7, wherein the circuit board assembly is integrated with an ECU circuit of the air pump.

9. The brushless electric machine of claim 8, wherein the electric machine is a single phase electric machine, and the stator core of the stator assembly has an asymmetric crown.

10. The brushless electric machine of claim 9, wherein the asymmetric crowns are divided into large and small crowns along a tooth centerline, the large and small crowns having a circular arc transition therebetween.

11. The brushless electric machine of any of claims 8-10, wherein the electric machine is a 4-pole, 4-slot or 6-pole, 6-slot machine.

12. The brushless electric machine of claim 8, wherein the electric machine is a three-phase machine, employing 4-pole 6 slots or 8-pole 6 slots.

13. An air pump system for a vehicle seat, characterized by comprising an air pump provided in a vehicle seat and the brushless motor according to any one of claims 1 to 12 for driving the air pump.