Outer rotor motor for balancing engine and balancing method thereof

Abstract

The invention discloses an external rotor motor for balancing an engine, which comprises a plurality of external rotor motor assemblies and a shell assembly, the external rotor motor assemblies are distributed according to a phase relationship and are rotatably erected in the shell assembly, and the shell assembly is fixedly connected with the engine; a controller which is in signal connection with the outer rotor motor assembly and used for receiving engine data and controlling the rotating speed of an outer rotor motor is arranged on the shell assembly, the outer rotor motor assembly comprises a motor outer rotor and a motor stator, and the motor stator is fixed in the shell assembly and electrified to generate a magnetic field. The motor outer rotor comprises an outer rotor shell with the outer wall of an eccentric unbalanced structure and a permanent magnet, and the outer rotor shell is driven to rotate in the shell assembly through cooperation of the permanent magnet and a magnetic field so as to generate centrifugal force counteracting reciprocating inertia force of an engine piston. According to the invention, the structure is compact, a complex gear set mechanism is not needed, a corresponding phase angle is not needed during assembly, and meanwhile, the reciprocating inertia force of the piston can be balanced more intelligently by using the controller for control.

Description

Technical Field

[0001] The invention relates to an outer rotor motor for engine balancing and a balancing method thereof, belonging to the technical field of automobile engines. Background Art

[0002] With the development of science and technology, people have higher and higher demands for the functions and comfort of cars. The vibration and noise of the engine of traditional fuel vehicles are very large during operation, which brings a bad experience to the surrounding environment and the drivers and passengers. The vibration and noise of the engine are mainly caused by the reciprocating inertia force of the piston. At present, most household fuel vehicles are equipped with four-cylinder engines. The four-cylinder engine itself can effectively offset the first-order reciprocating inertia force by adjusting the piston phase. The second-order reciprocating inertia force is the main cause of engine noise and vibration.

[0003] The existing Chinese patent with announcement number CN205260134U proposes a "gasoline engine second-order reciprocating inertia force balancing mechanism", including a timing chain, a drive sprocket, a crankshaft sprocket, and balance shaft sprockets I and II arranged on the side of the engine. The technical key points are: the drive sprocket, balance shaft sprocket II and crankshaft sprocket are connected by the timing chain to form a triangular structure, the tensioner is arranged in the triangular structure, a vibration damper is arranged on the timing chain between the drive sprocket and the balance shaft sprocket II, the balance shaft sprocket I is located at the bottom of the timing chain between the drive sprocket and the crankshaft sprocket, and the balance shaft sprocket I is meshed with the drive sprocket. The vibration amplitude of the second-order reciprocating inertia force and the noise of the gasoline engine are fundamentally reduced, and the performance of the engine is improved.

[0004] The above-mentioned balancing mechanism requires a complex gear set mechanism, occupies a large space, and requires a corresponding phase angle during assembly. The operation is cumbersome and the degree of intelligence is not high. Therefore, there is an urgent need for a balancing mechanism with a compact structure that does not require a complex gear set mechanism and does not require a corresponding phase angle during assembly. At the same time, a controller is used to control an outer rotor motor that can more intelligently balance the reciprocating inertia force and is dedicated to balancing the vibration of the engine, so as to effectively offset the second-order reciprocating inertia torque and improve the vibration and noise of the engine. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing automobile engine balancing mechanism has a complex structure, cumbersome installation and a low intelligence level.

[0006] In order to solve the above technical problems, the present invention provides an external rotor motor for engine balancing and a balancing method thereof, which has a compact structure, does not require a complex gear set mechanism, and does not require a corresponding phase angle during assembly. At the same time, the use of a controller can more intelligently balance the reciprocating inertia force of the piston.

[0007] In order to achieve the above technical objectives and the above technical effects, this application is implemented through the following technical solutions:

[0008] In a first aspect, the present invention provides an outer rotor motor for engine balancing, comprising an outer rotor motor assembly and a housing assembly, wherein the outer rotor motor assembly is provided with a plurality of groups and all are rotatably mounted in the housing assembly, and the housing assembly is used to connect to the engine and transmit the centrifugal force of the outer rotor motor assembly to the engine;

[0009] It also includes a controller, which is arranged on the housing assembly and is connected to the outer rotor motor assembly signal, and is used to receive engine data and control the speed of the outer rotor motor.

[0010] Preferably, the plurality of groups of outer rotor motors are distributed according to a phase relationship.

[0011] Preferably, the outer rotor motor assembly includes an outer rotor and a stator, the stator is fixed in the housing assembly, and the outer rotor is driven to rotate in the housing assembly by the stator to generate centrifugal force to offset the reciprocating inertia force of the engine piston.

[0012] Furthermore, the motor stator includes a rotating shaft and a coil, the rotating shaft is fixed on the housing assembly, the coil winding is fixedly wound on the rotating shaft and electrically connected to an external power source to realize power supply and generate a magnetic field.

[0013] Furthermore, the outer rotor of the motor includes an outer rotor shell and a permanent magnet, the permanent magnet is arranged in the outer rotor shell, the outer rotor shell is coaxially arranged with the rotating shaft, and the outer wall of the outer rotor shell is arranged as an eccentric unbalanced structure.

[0014] Furthermore, the outer walls at both ends of the rotating shaft are provided with limiting planes, and the housing component is provided with mounting grooves adapted to the limiting planes.

[0015] Furthermore, a plurality of bearings are arranged between the outer rotor of the motor and the rotating shaft.

[0016] Furthermore, the housing assembly includes an upper housing and a lower housing, and the upper housing and the lower housing are detachably connected and are both connected to the engine cylinder block.

[0017] The second invention provides an engine balancing method, using the above-mentioned engine balancing outer rotor motor, comprising the following steps:

[0018] S1. The external rotor motor is installed on the engine and the device is connected to the power supply;

[0019] S2, the engine is running, the controller receives the phase position of the engine rotation and the rotation speed of the crankshaft and inputs the relevant signals to the outer rotor motor assembly;

[0020] S3, the outer rotor motor assembly receives the signal and rotates in the housing assembly to generate centrifugal force;

[0021] S4, the centrifugal force acts on the housing assembly and is transmitted to the engine through the housing assembly to offset the engine piston position, which will form a corresponding reciprocating inertia force.

[0022] The outer rotor motor for engine balancing and the balancing method thereof provided by the present invention have the following advantages:

[0023] 1. When the present invention is used, the controller receives engine data and controls the outer rotor motor assembly to rotate in the housing assembly. When rotating, the motor stator is powered to generate a magnetic field, thereby driving the outer rotor of the motor to rotate. The outer rotor of the motor with an eccentric and unbalanced structure on the outside generates centrifugal force during rotation. The centrifugal force is transmitted to the engine through the housing assembly to offset the reciprocating inertia force of the engine piston, thereby improving the vibration and noise of the engine. At the same time, there is no need for a complicated gear structure, the structure is simple, and the installation is convenient and quick.

[0024] 2. When the present invention is used, the reciprocating inertial force of the piston can be balanced more intelligently through the control of the controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is the phase diagram of the second-order reciprocating inertia force of the four-cylinder engine;

[0026] Figure 2 It is a structural schematic diagram of an outer rotor motor for engine balancing according to the present invention;

[0027] In the figure:

[0028] 1-outer rotor motor assembly; 11-motor outer rotor; 111-outer rotor housing; 112-permanent magnet; 12-motor stator; 121-rotating shaft; 122-coil; 2-housing assembly; 21-upper housing; 22-lower housing; 3-bearing; 4-limiting plane; 5-mounting slot; 51-mounting slot one; 52-mounting slot two; 6-controller. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technical personnel in this field without making creative work are within the scope of protection of the present invention.

[0030] Reference Figure 1 and Figure 2An outer rotor motor for engine balancing includes an outer rotor motor assembly 1 and a shell assembly 2. The outer rotor motor assembly 1 is installed with multiple groups and all are rotated and mounted in the shell assembly 2 according to a phase relationship. The shell assembly 2 is used to connect the engine and transmit the centrifugal force of the outer rotor motor assembly 1 to the engine to offset the reciprocating inertia force of the engine piston, thereby improving the vibration and noise of the engine.

[0031] In a further embodiment, the outer rotor motor assembly 1 includes a motor outer rotor 11 and a motor stator 12, the motor stator 12 is fixed in the housing assembly 2, and the motor outer rotor 11 is driven by the motor stator 12 to rotate in the housing assembly 2 to generate centrifugal force to offset the reciprocating inertia force of the engine piston.

[0032] The motor stator 12 includes a rotating shaft 121 and a coil 122. The rotating shaft 121 is fixedly mounted on the housing assembly 2. The coil 122 winding is fixedly wound on the rotating shaft 121 and is electrically connected to an external power supply to realize power supply to generate a magnetic field. The motor outer rotor 11 includes an outer rotor housing 111 and a permanent magnet 112. The permanent magnet 112 is embedded in the outer rotor housing 111 to cooperate with the magnetic field generated by the motor stator 12 to realize the rotation of the outer rotor housing 111. The outer rotor housing 111 is coaxially installed with the rotating shaft 121. A bearing 3 is installed at each end of the outer rotor housing 111. The outer ring of the bearing 3 is matched with the inner circle of the outer rotor housing 111, and the inner ring of the bearing 3 is matched with the rotating shaft 121 of the motor stator 12. The bearing 3 is used to support the rotation of the outer rotor housing 111, reduce friction, and improve the overall life of the outer rotor motor assembly 1. The outer wall of the outer rotor housing 111 is integrally injection-molded into an eccentric unbalanced structure to generate centrifugal force during rotation.

[0033] Reference Figure 1 In a further embodiment, the housing assembly 2 includes an upper housing 21 and a lower housing 22, the upper housing 21 and the lower housing 22 are fixed by bolts, and the upper housing 21 and the lower housing 22 are connected to the engine cylinder block by bolts, and the limiting planes 4 are symmetrically opened on the outer walls at both ends of the rotating shaft 121, and a mounting groove 5-1 for mounting the rotating shaft 121 and adapted to one side of the limiting plane 4 is opened on the upper housing 21 or the lower housing 22, and a mounting groove 5-2 for mounting the rotating shaft 121 on a side different from the limiting plane 4 is opened on the lower housing 22 or the upper housing 21, and the mounting groove 5-1 and the mounting groove 5-2 constitute a mounting groove 5 for fixing the rotating shaft 121.

[0034] Reference Figure 1 and Figure 2, an outer rotor motor for engine balancing, also includes a controller 6. The signal connection between the controller 6 and the outer rotor motor assembly 1 is a prior art and will not be described in detail. The controller 6 is installed on the side wall of the upper shell or the lower shell to receive and read the phase position of the engine rotation and the rotation speed of the crankshaft, and input the relevant signal to the outer rotor motor assembly 1, so that the motor outer rotor 11 rotates and the motor outer rotor 11 generates centrifugal force to offset the reciprocating inertia force. The two motors need to have a corresponding phase relationship when rotating. When the controller 6 is selected, it needs to have a fast response speed and can ensure accurate control at high temperature of the engine.

[0035] An engine balancing method, using the above-mentioned outer rotor motor for engine balancing, comprises the following steps:

[0036] S1. Fasten the outer rotor motor to the engine with bolts and connect the device to the power supply.

[0037] S2 , the engine is running, the controller 6 receives the phase position of the engine rotation and the rotation speed of the crankshaft and inputs the relevant signals to the outer rotor motor assembly 1 .

[0038] S3, the outer rotor motor assembly 1 receives the signal and rotates in the housing assembly 2 to generate centrifugal force;

[0039] S4, the centrifugal force acts on the housing assembly 2 and is transmitted to the engine through the housing assembly 2 to offset the corresponding reciprocating inertia force generated by the position of the engine piston.

[0040] The above is only a preferred embodiment of the present invention, and is not any formal or substantial limitation of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present invention, can make some changes, modifications and equivalent changes made by using the technical content disclosed above, which are equivalent embodiments of the present invention; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An outer rotor motor for engine balancing, characterized in that: It comprises an outer rotor motor assembly and a housing assembly, wherein the outer rotor motor assembly is provided with a plurality of groups and all are rotatably mounted in the housing assembly, and the housing assembly is used to connect to the engine and transmit the centrifugal force of the outer rotor motor assembly to the engine; It also includes a controller, which is arranged on the housing assembly and is connected to the outer rotor motor assembly signal, and is used to receive engine data and control the speed of the outer rotor motor.

2. An outer rotor motor for engine balancing according to claim 1, characterized in that: The plurality of groups of outer rotor motors are distributed according to a phase relationship.

3. An outer rotor motor for engine balancing according to claim 1, characterized in that: The outer rotor motor assembly includes an outer rotor and a stator. The stator is fixed in the housing assembly. The outer rotor is driven to rotate in the housing assembly by the stator to generate centrifugal force to offset the reciprocating inertia force of the engine piston.

4. An outer rotor motor for engine balancing as claimed in claim 3, characterized in that: The motor stator comprises a rotating shaft and a coil, wherein the rotating shaft is fixed on a housing assembly, and the coil winding is fixedly wound on the rotating shaft and electrically connected to an external power source to realize power supply and generate a magnetic field.

5. An outer rotor motor for engine balancing as claimed in claim 4, characterized in that: The motor outer rotor comprises an outer rotor shell and a permanent magnet, wherein the permanent magnet is arranged in the outer rotor shell, the outer rotor shell is coaxially arranged with the rotating shaft, and the outer wall of the outer rotor shell is arranged as an eccentric unbalanced structure.

6. An outer rotor motor for engine balancing as claimed in claim 4, characterized in that: The outer walls at both ends of the rotating shaft are provided with limiting planes, and the housing component is provided with mounting grooves adapted to the limiting planes.

7. An outer rotor motor for engine balancing as claimed in claim 4, characterized in that: A plurality of bearings are arranged between the outer rotor of the motor and the rotating shaft.

8. An outer rotor motor for engine balancing as claimed in claim 2, characterized in that: The housing assembly comprises an upper housing and a lower housing, wherein the upper housing and the lower housing are detachably connected and are both connected to the engine cylinder block.

9. An engine balancing method, characterized in that: The use of the outer rotor motor for engine balancing according to any one of claims 1 to 8 comprises the following steps: S1. The external rotor motor is installed on the engine and the device is connected to the power supply; S2, the engine is running, the controller receives the phase position of the engine rotation and the rotation speed of the crankshaft and inputs the relevant signals to the outer rotor motor assembly; S3, the outer rotor motor assembly receives the signal and rotates in the housing assembly to generate centrifugal force; S4, the centrifugal force acts on the housing assembly and is transmitted to the engine through the housing assembly to offset the engine piston position, which will form a corresponding reciprocating inertia force.

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