CN106610332A - Balancing machine for detecting electric vehicle wheels and method for detecting unbalance mass in dynamic and static balance using same - Google Patents
Balancing machine for detecting electric vehicle wheels and method for detecting unbalance mass in dynamic and static balance using same Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/12—Static balancing; Determining position of centre of gravity
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining imbalance
- G01M1/16—Determining imbalance by oscillating or rotating the body to be tested
- G01M1/22—Determining imbalance by oscillating or rotating the body to be tested and converting vibrations due to imbalance into electric variables
- G01M1/225—Determining imbalance by oscillating or rotating the body to be tested and converting vibrations due to imbalance into electric variables for vehicle wheels
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Abstract
A balancing machine for detecting electric vehicle wheels and a method for detecting unbalance mass in dynamic and static balance using the same belong to the field of dynamic and static balance detection of electric vehicle wheels. The problem that there is no balancing machine for detecting the dynamic and static balance of a whole electric vehicle wheel is solved. The static balance of an electric vehicle wheel is detected through support mechanisms and a Hall sensor in a to-be-detected wheel. On the basis of static balance detection, a potentiometer stent, a potentiometer and a dot laser are added to detect the dynamic balance of the electric vehicle wheel. The balancing machine for detecting electric vehicle wheels of the invention can be used to detect the dynamic and static balance of electric vehicle wheels, and is simple in structure and easy to operate. The balancing machine and the method are mainly used to detect the dynamic and static balance of electric vehicle wheels.
Description
Technical Field
The invention belongs to the field of dynamic and static balance detection of electric vehicle wheels.
Background
The dynamic balance products of the automobile wheels are mature and have corresponding national standards, but the wheels of the electric vehicle have no special balancing machine. The wheels of the electric vehicle only can do dynamic and static balance for the motor part of the wheels of the electric vehicle before leaving the factory, but do not do dynamic and static balance detection for the whole wheels of the electric vehicle, and if the unbalance amount of the wheels of the electric vehicle is large in the using process, the safety and the comfort of electric vehicle users can be influenced.
Disclosure of Invention
The invention provides a balancing machine for detecting wheels of an electric vehicle and a method for detecting unbalanced mass in dynamic balance and static balance by adopting the balancing machine, aiming at solving the problem that the existing balancing machine for detecting the dynamic balance and the static balance of the whole wheels of the electric vehicle is not available.
The balancing machine for detecting the wheels of the electric vehicle comprises a base, a processor, a controller, a display and two supporting mechanisms;
the two supporting mechanisms, the processor and the controller are fixed on the base and are arranged oppositely, the processor and the controller are packaged in the shell, and the display is fixed on the shell;
the two supporting mechanisms respectively support two ends of a main shaft of the wheel to be detected, are also used for detecting the dynamic pressure exerted on the supporting mechanism connected with the left side surface and the right side surface of the wheel to be detected and transmitting the detected dynamic pressure to the processor,
the processor is used for receiving the phase signal output by the Hall sensor in the wheel to be detected and is also used for driving the motor in the wheel to be detected to rotate through the controller,
the processor processes the received dynamic pressure and phase signals and displays the processing result through the display.
Each supporting mechanism comprises a sheath, a vibration swing frame and a piezoelectric sensor, the sheath is sleeved outside the vibration swing frame, the top of the vibration swing frame is provided with a clamping groove, the clamping groove is used for lifting a main shaft of a wheel to be detected, the clamping groove is exposed outside the sheath,
the vibration swing frame is a hollow-out vibration swing frame,
the piezoelectric sensor is extruded at the hollow part of the vibration swing frame, and the dynamic pressure born by the vibration swing frame is detected according to the deformation of the vibration swing frame.
Each supporting mechanism further comprises a potentiometer support, a potentiometer and a point laser;
the potentiometer support, the potentiometer and the point type laser are all positioned in the sheath, the potentiometer support is fixed on the front surface of the vibration swing frame, the potentiometer is fixed on the lower surface of the potentiometer support, and a rotating shaft of the potentiometer is fixedly connected with the point type laser;
an open slot is arranged on the sheath, and laser emitted by the point type laser is emitted from the open slot.
The method for detecting the unbalanced mass in the static balance by adopting the balancing machine for detecting the electric vehicle wheel comprises the following steps:
step A1: fixing two ends of the main shaft of the wheel to be detected on the two supporting mechanisms respectively to enable the wheel to be detected to be parallel to the two supporting mechanisms,
step A2: the controller drives the motor of the wheel to be detected to rotate, when the rotating speed of the wheel to be detected is stable, the two piezoelectric sensors respectively detect the dynamic pressure born by the vibration swing frame where each piezoelectric sensor is located according to the deformation of the vibration swing frame where the piezoelectric sensor is located, the detected dynamic pressure is uploaded to the processor, meanwhile, the phase signals detected by the Hall sensors in the wheel to be detected are uploaded to the processor, the processor converts the phase signals into the angular speed omega,
step A3: the processor processes the received dynamic pressure to obtain an imbalance forceAccording to the unbalanced forceAnd obtaining the unbalanced mass by the angular speed omega and the radius r of the wheel to be detected, and displaying the unbalanced mass through a display.
In step a3, the processor processes the dynamic pressure of the received motion to obtain the unbalanced forceThe specific process comprises the following steps:
by the formulaObtaining unbalanced forces
Wherein,the dynamic pressure detected by the piezoelectric sensor on the left side of the wheel,the dynamic pressure detected by the piezoelectric sensor on the right side of the wheel.
In a method for detecting an unbalanced mass in static balance by means of a balancing machine for detecting wheels of an electric vehicle, the unbalanced mass is obtained byThe realization is that, among others,indicating the unbalanced mass in the static balance detection.
The method for detecting the unbalanced mass in the dynamic balance by adopting the balancing machine for detecting the electric vehicle wheel comprises the following steps:
step B1: fixing two ends of a main shaft of the wheel to be detected on the two supporting mechanisms respectively, enabling the wheel to be detected to be parallel to the two supporting mechanisms, storing the diameter D of a steel ring of the wheel to be detected and the vertical distance C between the two point type lasers into a processor, and enabling exit ports of the two point type lasers to be arranged oppositely;
step B2: enabling a first point type laser to emit laser, horizontally rotating the first point type laser to enable the laser emitted by the first point type laser to strike the outer edge of a steel ring of a wheel to be detected, enabling the first point type laser to rotate to drive a first potentiometer on which the first point type laser is located to rotate, enabling the first potentiometer to output an electric signal to a processor, enabling the processor to obtain an angle A swept by the laser emitted by the first point type laser according to the electric signal output by the first potentiometer, and enabling the processor to obtain an angle A swept by the laser emitted by the first point type laser according to the electric signal output by the first potentiometerThe process of obtaining the alpha is carried out,
wherein a is the vertical distance between the main shaft of the first point type laser and the side surface of the wheel to be detected adjacent to the main shaft, and L1 is the vertical distance between the central hole of the wheel to be detected and the first point type laser;
step B3: the second point type laser emits laser, the second point type laser horizontally rotates to enable the laser emitted by the second point type laser to strike the outer edge of a steel ring of a wheel to be detected, the second point type laser rotates to drive the second potentiometer to rotate, so that the second potentiometer outputs an electric signal to the processor, the processor outputs the electric signal according to the second potentiometer to obtain the angle B swept by the laser emitted by the second point type laser, and the processor further obtains the angle B swept by the laser emitted by the second point type laser according to the angle B swept by the laser emitted by the second point type laserThe process of obtaining the compound b comprises the following steps of,
wherein b is the vertical distance between the main shaft of the second point type laser and the side surface of the wheel to be detected adjacent to the main shaft, L2 is the vertical distance between the center hole of the wheel to be detected and the second point type laser,
step B4: the hand drives a motor of the wheel to be detected to rotate through the controller, when the rotating speed of the wheel to be detected is stable, a phase signal detected by a Hall sensor in the wheel to be detected is uploaded to the processor, the processor converts the phase signal into an angular speed omega,
meanwhile, the piezoelectric sensor on the left side of the wheel to be detected detects the dynamic pressure born by the vibration swing frame according to the deformation of the vibration swing frame where the piezoelectric sensor is located
The piezoelectric sensor on the right side of the wheel to be detected detects the dynamic pressure born by the vibration swing frame according to the deformation of the vibration swing frame where the piezoelectric sensor is located
The processor is used for processing the data by the following formula I:
to obtainAnd
wherein,the centrifugal force generated for the unbalanced mass on the left side of the wheel to be tested,
the centrifugal force generated for the unbalanced mass on the right side of the wheel to be tested,
step B5: centrifugal force generated according to unbalanced mass on left side surface of wheel to be detectedThe angular velocity omega and the radius r of the wheel to be detected are used for obtaining the unbalanced mass on the left side surface of the wheel to be detected; and then the centrifugal force is generated according to the unbalanced mass on the right side surface of the wheel to be detectedThe angular velocity omega and the radius r of the wheel to be detected obtain the unbalanced mass on the right side surface of the wheel to be detected, and the unbalanced mass on the left side surface and the right side surface of the wheel to be detected are displayed through a display, so that the detection of the unbalanced mass on the left side surface and the right side surface of the wheel to be detected in the dynamic balance detection is completed.
In the method for detecting the unbalanced mass in the dynamic balance by adopting the balancing machine for detecting the wheel of the electric vehicle, the unbalanced mass on the left side surface of the wheel to be detected passes throughObtaining, passing the unbalanced mass on the right side of the wheel to be detectedThe acquisition step is carried out by the user,
wherein,representing the unbalanced mass on the left side of the wheel to be tested in dynamic balance testing,indicating the unbalanced mass on the right side of the wheel to be tested in the dynamic balance test.
The invention has the beneficial effects that the invention can carry out dynamic and static balance detection on the whole wheel of the electric vehicle, thereby improving the safety and the comfort of the electric vehicle user. The invention can directly calculate the dynamic and static unbalanced quality and phase of the wheel, and directly display the quality and phase through the display, can conveniently carry out balance correction on the wheel, and has simple operation and high efficiency.
Drawings
FIG. 1 is a schematic structural diagram of a balancing machine for detecting wheels of an electric vehicle according to the present invention;
FIG. 2 is a schematic view of an installation of the electric vehicle during wheel detection;
FIG. 3 is a schematic structural view of the support mechanism;
FIG. 4 is a schematic diagram of the dimension measurement of the balancing machine for detecting wheels of an electric vehicle according to the present invention during dynamic balance detection;
FIG. 5 is a diagram illustrating the electrical connection of the balancing machines for detecting the wheels of the electric vehicle according to the present invention.
Detailed Description
The first embodiment is as follows: referring to fig. 1, 2, 4 and 5, the embodiment of the balancing machine for detecting the wheels of the electric vehicle is described, and the balancing machine comprises a base 1, a processor 2-1, a controller 2-2, a display 3 and two supporting mechanisms 4;
the two supporting mechanisms 4, the processor 2-1 and the controller 2-2 are all fixed on the base 1, the two supporting mechanisms 4 are oppositely arranged, the processor 2-1 and the controller 2-2 are packaged in the casing 2, and the display 3 is fixed on the casing 2;
the two supporting mechanisms 4 respectively support two ends of a main shaft of the wheel 5 to be detected, are also used for detecting the dynamic pressure exerted on the supporting mechanism 4 connected with the left side surface and the right side surface of the wheel 5 to be detected and transmitting the detected dynamic pressure to the processor 2-1,
the processor 2-1 is used for receiving the phase signals output by the Hall sensors in the wheel 5 to be detected and is also used for driving the motor in the wheel 5 to be detected to rotate through the controller 2-2,
the processor 2-1 processes the received dynamic pressure and phase signals and displays the processing results through the display 3.
In the present embodiment, the electric vehicle wheel itself includes the motor and the hall sensor, and the angular velocity ω of the electric vehicle wheel is obtained from the phase signal output from the hall sensor.
The balancing machine for detecting the wheels of the electric vehicle can carry out static balance detection, can directly calculate the unbalance amount in the static balance detection, and has the advantages of simple operation and high detection efficiency and detection precision.
When the device is used, the wheel 5 to be detected is arranged on the two supporting mechanisms 4, the controller 2-2 drives the motor of the wheel 5 to be detected to rotate, and when the rotating speed of the wheel 5 to be detected is stable, the piezoelectric sensors 4-3 detect the dynamic pressure born by the vibrating swing frames 4-2 at the left side and the right side of the wheel 5 to be detectedAndand by the formulaObtaining unbalanced forcesAccording to the unbalanced forceAnd acquiring the angular speed omega of the wheel 5 to be detected and the radius r of the wheel 5 to be detected, and displaying the unbalanced mass through the display 3.
Wherein,the dynamic pressure detected by the piezoelectric sensor 4-3 on the left side of the wheel,the dynamic pressure detected by the piezoelectric sensor 4-3 on the right side of the wheel.
The second embodiment is as follows: referring to fig. 1 to 3 to illustrate the embodiment, the difference between the embodiment and the balancing machine for detecting wheels of an electric vehicle described in the first embodiment is that each supporting mechanism 4 includes a sheath 4-1, a vibrating pendulum frame 4-2 and a piezoelectric sensor 4-3, the sheath 4-1 is sleeved outside the vibrating pendulum frame 4-2, the top of the vibrating pendulum frame 4-2 is provided with a clamping groove 4-2-1, the clamping groove 4-2-1 is used for lifting a spindle of a wheel 5 to be detected, and the clamping groove 4-2-1 is exposed outside the sheath 4-1,
the vibration swing frame 4-2 is a hollow vibration swing frame,
the piezoelectric sensor 4-3 is extruded at the hollow part of the vibration swing frame 4-2, and detects the dynamic pressure born by the vibration swing frame 4-2 according to the deformation of the vibration swing frame 4-2.
In the embodiment, the vibration swing frame 4-2 is arranged as a hollow-out vibration swing frame, the piezoelectric sensor 4-3 is extruded at the hollow-out part of the vibration swing frame 4-2, the dynamic pressure borne by the vibration swing frame 4-2 is detected according to the deformation of the vibration swing frame 4-2, and the accuracy of the detection result is high.
The third concrete implementation mode: referring to fig. 1 to 5, the embodiment is described, and the embodiment is different from the balancing machine for detecting wheels of an electric vehicle described in the second embodiment in that each supporting mechanism 4 further includes a potentiometer support 4-4, a potentiometer 4-5, and a dot laser 4-6;
the potentiometer support 4-4, the potentiometer 4-5 and the point type laser 4-6 are all positioned in the sheath 4-1, the potentiometer support 4-4 is fixed on the front surface of the vibration swing frame 4-2, the potentiometer 4-5 is fixed on the lower surface of the potentiometer support 4-4, and a rotating shaft of the potentiometer 4-5 is fixedly connected with the point type laser 4-6;
an open slot 4-1-1 is arranged on the sheath 4-1, and laser emitted by the point type laser 4-6 is emitted from the open slot 4-1-1.
The balancing machine for detecting the wheels of the electric vehicle in the embodiment can carry out dynamic balance detection, and in the using process:
two point type lasers 4-6 are made to emit laser respectively and hit the outer edge of a steel ring of a wheel 5 to be detected, the rotation of the point type lasers 4-6 drives the potentiometers 4-5 to rotate, the angle A and the angle B swept by the two point type lasers 4-6 are obtained according to electric signals output by the two potentiometers 4-5, the vertical distance a and the vertical distance B between the two point type lasers 4-6 and the side face of the wheel 5 to be detected adjacent to the two point type lasers 4-6 are obtained according to the angle A and the angle B, and then the dynamic pressure measured by the two piezoelectric sensors 4-3 is used for obtaining the dynamic pressurea. b, the centrifugal forces on the two sides of the wheel 5 to be detected are determined, so that the imbalance mass on each side is determined, and the wheel 5 to be detected is corrected according to the determined imbalance masses.
The fourth concrete implementation mode: referring to fig. 1 to 3, the present embodiment and the second embodiment describe a method for detecting an unbalanced mass in a static balance by using a balancing machine for detecting wheels of an electric vehicle, the method for detecting an unbalanced mass in a static balance includes the following steps:
step A1: two ends of a main shaft of the wheel 5 to be detected are respectively fixed on the two supporting mechanisms 4, so that the wheel 5 to be detected is parallel to the two supporting mechanisms 4,
step A2: the controller 2-2 drives the motor of the wheel 5 to be detected to rotate, when the rotating speed of the wheel 5 to be detected is stable, the two piezoelectric sensors 4-3 detect the dynamic pressure borne by the vibrating swing frame 4-2 where each piezoelectric sensor 4-3 is located according to the deformation of the vibrating swing frame 4-2 where the piezoelectric sensor is located, the detected dynamic pressure is transmitted to the processor 2-1, meanwhile, a phase signal detected by a Hall sensor in the wheel 5 to be detected is transmitted to the processor 2-1, the processor 2-1 converts the phase signal into an angular velocity omega,
step A3: the processor 2-1 processes the received dynamic pressure to obtain an unbalanced forceAccording to the unbalanced forceThe angular velocity omega and the radius r of the wheel 5 to be detected obtain the unbalanced mass, and the unbalanced mass is displayed through the display 3.
In the present embodiment, the wheel 5 to be detected is corrected based on the determined unbalance mass.
The fifth concrete implementation mode: referring to fig. 1 to 5, the embodiment is described, and the method for detecting unbalanced mass in static balance by using the balancer for detecting electric vehicle wheels in the embodiment is different from the method for detecting unbalanced mass in static balance in the embodiment four, in which in the step a3, the processor 2-1 processes the dynamic pressure received by the dynamic pressure receiving unit to obtain the unbalanced forceThe specific process comprises the following steps:
by the formulaObtaining unbalanced forces
Wherein,the dynamic pressure detected by the piezoelectric sensor 4-3 on the left side of the wheel,the dynamic pressure detected by the piezoelectric sensor 4-3 on the right side of the wheel.
The sixth specific implementation mode: the present embodiment is described with reference to fig. 1 to 3, and differs from the method for detecting an unbalanced mass in static balance using a balancing machine for detecting wheels of an electric vehicle according to the fourth or fifth embodiment in that the unbalanced mass is obtained byThe realization is that, among others,indicating the unbalanced mass in the static balance detection.
The seventh embodiment: referring to fig. 1 to 5, the present embodiment is described, and a method for detecting an unbalanced mass in dynamic balance by using a balancer for detecting electric vehicle wheels according to a third embodiment includes the following steps:
step B1: fixing two ends of a main shaft of a wheel 5 to be detected on the two supporting mechanisms 4 respectively, enabling the wheel 5 to be detected to be parallel to the two supporting mechanisms 4, storing the diameter D of a steel ring of the wheel 5 to be detected and the vertical distance C between the two point type lasers 4-6 into the processor 2-1, and enabling the emergent ports of the two point type lasers 4-6 to be arranged oppositely;
step B2: enabling a first point type laser 4-6 to emit laser, horizontally rotating the first point type laser 4-6 to enable the laser emitted by the first point type laser 4-6 to strike the outer edge of a steel ring of a wheel 5 to be detected, enabling the first point type laser 4-6 to rotate to drive a first potentiometer 4-5 where the first point type laser is located, enabling the first potentiometer 4-5 to output an electric signal to a processor 2-1, enabling the processor 2-1 to obtain an angle A swept by the laser emitted by the first point type laser 4-6 according to the electric signal output by the first potentiometer 4-5, and enabling the processor 2-1 to obtain the angle A swept by the laser emitted by the first point type laser 4-6 according to the electric signal output by the first potentiometer 4-The process of obtaining the alpha is carried out,
wherein a is the vertical distance between the main shaft of the first point laser 4-6 and the side surface of the wheel 5 to be detected adjacent to the main shaft, and L1 is the vertical distance between the central hole of the wheel 5 to be detected and the first point laser 4-6;
step B3: enabling the second point type laser 4-6 to emit laser, horizontally rotating the second point type laser 4-6 to enable the laser emitted by the second point type laser 4-6 to strike the outer edge of a steel ring of a wheel 5 to be detected, enabling the second point type laser 4-6 to rotate to drive the second potentiometer 4-5 to rotate, enabling the second potentiometer 4-5 to output an electric signal to the processor 2-1, enabling the processor 2-1 to obtain an angle B swept by the laser emitted by the second point type laser 4-6 according to the electric signal output by the second potentiometer 4-5, and enabling the processor 2-1 to obtain the angle B swept by the laser emitted by the second point type laser 4-6 according to the electric signal output by the second potentiometer 4-5The process of obtaining the compound b comprises the following steps of,
wherein b is the vertical distance between the main shaft of the second point laser 4-6 and the side surface of the wheel 5 to be detected adjacent to the main shaft, L2 is the vertical distance between the center hole of the wheel 5 to be detected and the second point laser 4-6,
step B4: the controller drives the motor of the wheel 5 to be detected to rotate, when the rotating speed of the wheel 5 to be detected is stable, a phase signal detected by a Hall sensor in the wheel 5 to be detected is uploaded to the processor 2-1, the processor 2-1 converts the phase signal into an angular speed omega,
meanwhile, the piezoelectric sensor 4-3 at the left side of the wheel 5 to be detected detects the dynamic pressure born by the vibration swing frame 4-2 according to the deformation of the vibration swing frame 4-2 at the position of the piezoelectric sensor
The piezoelectric sensor 4-3 on the right side of the wheel 5 to be detected detects the dynamic pressure born by the vibration swing frame 4-2 according to the deformation of the vibration swing frame 4-2 in which the piezoelectric sensor is positioned
The processor 2-1 processes the data by the following equation one:
to obtainAnd
wherein,the centrifugal force generated for the unbalanced mass on the left side of the wheel 5 to be tested,
the centrifugal force generated for the unbalanced mass on the right side of the wheel 5 to be tested,
step B5: according to the centrifugal force generated by the unbalanced mass on the left side of the wheel 5 to be inspectedThe angular velocity omega and the radius r of the wheel 5 to be detected, and the unbalanced mass on the left side surface of the wheel 5 to be detected is obtained; and then according to the centrifugal force generated by the unbalanced mass on the right side surface of the wheel 5 to be detectedThe angular velocity omega and the radius r of the wheel 5 to be detected obtain the unbalanced mass on the right side surface of the wheel 5 to be detected, and the unbalanced mass on the left side surface and the right side surface of the wheel 5 to be detected are displayed through the display 3, so that the detection of the unbalanced mass on the left side surface and the right side surface of the wheel 5 to be detected in the dynamic balance detection is completed.
In the present embodiment, the wheel 5 to be detected is corrected according to the calculated unbalanced masses on the left and right side surfaces of the wheel 5 to be detected.
The specific implementation mode is eight: referring to fig. 1 to 5, the embodiment is described, and the method for detecting unbalanced mass in dynamic balance by using the balancing machine for detecting electric vehicle wheels according to the seventh embodiment is different from the method for detecting unbalanced mass in dynamic balance by passing the unbalanced mass on the left side surface of the wheel 5 to be detectedObtaining, passing of unbalanced mass on right side of wheel 5 to be detectedThe acquisition step is carried out by the user,
wherein,representing the unbalanced mass on the left side face of the wheel 5 to be detected in dynamic balance testing,representing the unbalanced mass on the right hand side of the wheel 5 to be inspected in the dynamic balance test.
Claims (8)
1. The balancing machine for detecting the wheels of the electric vehicle is characterized by comprising a base (1), a processor (2-1), a controller (2-2), a display (3) and two supporting mechanisms (4);
the two supporting mechanisms (4), the processor (2-1) and the controller (2-2) are all fixed on the base (1), the two supporting mechanisms (4) are oppositely arranged, the processor (2-1) and the controller (2-2) are packaged in the shell (2), and the display (3) is fixed on the shell (2);
the two supporting mechanisms (4) respectively support two ends of a main shaft of the wheel (5) to be detected, are also used for detecting the dynamic pressure exerted on the supporting mechanism (4) connected with the left side surface and the right side surface of the wheel (5) to be detected and transmitting the detected dynamic pressure to the processor (2-1),
the processor (2-1) is used for receiving the phase signals output by the Hall sensors in the wheel (5) to be detected and is also used for driving the motor in the wheel (5) to be detected to rotate through the controller (2-2),
the processor (2-1) processes the received dynamic pressure and phase signals and displays the processing result through the display (3).
2. The balancing machine for detecting the wheels of the electric vehicle as claimed in claim 1, wherein each supporting mechanism (4) comprises a sheath (4-1), a vibrating swing frame (4-2) and a piezoelectric sensor (4-3), the sheath (4-1) is sleeved outside the vibrating swing frame (4-2), a clamping groove (4-2-1) is arranged at the top of the vibrating swing frame (4-2), the clamping groove (4-2-1) is used for lifting a main shaft of the wheel (5) to be detected, and the clamping groove (4-2-1) is exposed outside the sheath (4-1),
the vibration swing frame (4-2) is a hollow vibration swing frame,
the piezoelectric sensor (4-3) is extruded at the hollow part of the vibration swing frame (4-2), and the dynamic pressure born by the vibration swing frame (4-2) is detected according to the deformation of the vibration swing frame (4-2).
3. The balancing machine for checking wheels of electric vehicles according to claim 2, characterized in that each supporting mechanism (4) further comprises a potentiometer support (4-4), a potentiometer (4-5) and a point laser (4-6);
the potentiometer support (4-4), the potentiometer (4-5) and the point type laser (4-6) are all located in the sheath (4-1), the potentiometer support (4-4) is fixed on the front surface of the vibration swing frame (4-2), the potentiometer (4-5) is fixed on the lower surface of the potentiometer support (4-4), and the rotating shaft of the potentiometer (4-5) is fixedly connected with the point type laser (4-6);
an open slot (4-1-1) is arranged on the sheath (4-1), and laser emitted by the point type laser (4-6) is emitted from the open slot (4-1-1).
4. The method for detecting unbalanced mass in static balance using the balancing machine for detecting wheels of electric vehicles according to claim 2, wherein the method for detecting unbalanced mass in static balance comprises the steps of:
step A1: two ends of a main shaft of the wheel (5) to be detected are respectively fixed on the two supporting mechanisms (4) to ensure that the wheel (5) to be detected and the two supporting mechanisms (4) are parallel to each other,
step A2: the controller (2-2) drives a motor of the wheel (5) to be detected to rotate, when the rotating speed of the wheel (5) to be detected is stable, the two piezoelectric sensors (4-3) respectively detect the dynamic pressure born by the vibration swing frame (4-2) where each piezoelectric sensor (4-3) is located according to the deformation of the vibration swing frame (4-2) where the piezoelectric sensor is located, the detected dynamic pressure is uploaded to the processor (2-1), meanwhile, a phase signal detected by a Hall sensor in the wheel (5) to be detected is uploaded to the processor (2-1), the processor (2-1) converts the phase signal into an angular velocity omega,
step A3: the processor (2-1) processes the received dynamic pressure to obtain an imbalance forceAccording to the unbalanced forceAnd obtaining the unbalanced mass by the angular speed omega and the radius r of the wheel (5) to be detected, and displaying the unbalanced mass through a display (3).
5. The method for detecting unbalanced masses in static balance using a balancing machine for wheels of electric vehicles according to claim 4, wherein in step A3, the processor (2-1) processes the dynamic pressure received from the dynamic motion to obtain the unbalanced forcesThe specific process comprises the following steps:
by the formulaObtaining unbalanced forces
Wherein,is the dynamic pressure detected by the piezoelectric sensor (4-3) on the left side of the wheel,the dynamic pressure detected by the piezoelectric sensor (4-3) on the right side of the wheel.
6. Method for detecting an unbalanced mass in static balance using a balancing machine for electric vehicle wheels according to claim 4 or 5, characterized in that said unbalanced mass is obtained byThe realization is that, among others,indicating the unbalanced mass in the static balance detection.
7. The method for detecting an unbalanced mass in dynamic balance using the balancing machine for wheels of electric vehicles according to claim 3, wherein the method for detecting an unbalanced mass in dynamic balance comprises the steps of:
step B1: the method comprises the following steps that two ends of a main shaft of a wheel (5) to be detected are respectively fixed on two supporting mechanisms (4), the wheel (5) to be detected and the two supporting mechanisms (4) are parallel to each other, the diameter D of a steel ring of the wheel (5) to be detected and the vertical distance C between two point type lasers (4-6) are stored in a processor (2-1), and exit ports of the two point type lasers (4-6) are oppositely arranged;
step B2: the first point laser (4-6) is caused to emit laser light, and the first point laser (4-6) is horizontally rotated) Enabling laser emitted by a first point type laser (4-6) to strike the outer edge of a steel ring of a wheel (5) to be detected, enabling the first point type laser (4-6) to rotate to drive a first potentiometer (4-5) where the first point type laser is located to rotate, enabling the first potentiometer (4-5) to output an electric signal to a processor (2-1), enabling the processor (2-1) to obtain an angle A swept by the laser emitted by the first point type laser (4-6) according to the electric signal output by the first potentiometer (4-5), and enabling the processor (2-1) to obtain the angle A swept by the laser emitted by the first point type laser (4-6) according to the electric signal output by the first potentiometer (4The process of obtaining the alpha is carried out,
wherein a is the vertical distance between the main shaft of the first point laser (4-6) and the side surface of the wheel (5) to be detected adjacent to the main shaft, and L1 is the vertical distance between the center hole of the wheel (5) to be detected and the first point laser (4-6);
step B3: enabling the second point type laser (4-6) to emit laser, horizontally rotating the second point type laser (4-6), enabling the laser emitted by the second point type laser (4-6) to strike the outer edge of a steel ring of a wheel (5) to be detected, enabling the second point type laser (4-6) to rotate to drive the second potentiometer (4-5) to rotate, enabling the second potentiometer (4-5) to output an electric signal to the processor (2-1), enabling the processor (2-1) to obtain an angle B swept by the laser emitted by the second point type laser (4-6) according to the electric signal output by the second potentiometer (4-5), and enabling the processor (2-1) to obtain an angle B swept by the laser emitted by the second point type laser (4-6) according to the electric signal output by the second potentiometer (4-The process of obtaining the compound b comprises the following steps of,
wherein b is the vertical distance between the main shaft of the second point laser (4-6) and the side surface of the wheel (5) to be detected adjacent to the main shaft, L2 is the vertical distance between the center hole of the wheel (5) to be detected and the second point laser (4-6),
step B4: the hand drives a motor of the wheel (5) to be detected to rotate through the controller, when the rotating speed of the wheel (5) to be detected is stable, a phase signal detected by a Hall sensor in the wheel (5) to be detected is uploaded to the processor (2-1), the processor (2-1) converts the phase signal into an angular speed omega,
at the same time, the wheel to be inspected(5) The left piezoelectric sensor (4-3) detects the dynamic pressure born by the vibration swing frame (4-2) according to the deformation of the vibration swing frame (4-2) where the piezoelectric sensor is positioned
The piezoelectric sensor (4-3) on the right side of the wheel (5) to be detected detects the dynamic pressure born by the vibration swing frame (4-2) according to the deformation of the vibration swing frame (4-2) on which the piezoelectric sensor is positioned
The processor (2-1) is used for processing the data by the following formula one:
to obtainAnd
wherein,the centrifugal force generated by the unbalanced mass on the left side of the wheel (5) to be tested,
the centrifugal force generated by the unbalanced mass on the right side of the wheel (5) to be tested,
step B5: according to the centrifugal force generated by the unbalanced mass on the left side of the wheel (5) to be testedThe angular velocity omega and the radius r of the wheel (5) to be detected, and the unbalanced mass on the left side surface of the wheel (5) to be detected is obtained;and then according to the centrifugal force generated by the unbalanced mass on the right side surface of the wheel (5) to be detectedThe angular velocity omega and the radius r of the wheel (5) to be detected obtain the unbalanced mass on the right side surface of the wheel (5) to be detected, and the unbalanced mass on the left side surface and the right side surface of the wheel (5) to be detected are displayed through the display (3), so that the detection of the unbalanced mass on the left side surface and the right side surface of the wheel (5) to be detected in the dynamic balance detection is completed.
8. Method for detecting unbalanced masses in dynamic balance with a balancing machine for wheels of electric vehicles according to claim 7, characterized in that the unbalanced masses on the left side of the wheel (5) to be detected are passed throughObtaining the unbalance mass on the right side surface of the wheel (5) to be detectedThe acquisition step is carried out by the user,
wherein,representing the unbalanced mass on the left side of the wheel (5) to be detected in the dynamic balance test,represents the unbalanced mass on the right side of the wheel (5) to be detected in the dynamic balance test.
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