A balancing machine for measuring radial unevenness of a wheel assembly

Abstract

The utility model provides a kind of balancing machine with the radial unevenness of load measuring wheel assembly and diagnostic function, including at least one distance sensor component (6) is set on main shaft support (7), and is set on the side close to main shaft (5) installation wheel assembly.The utility model first distance sensor component (6) is set on box (1), adjust to set on main shaft support (7), and on the side close to main shaft (5) installation wheel assembly, distance sensor component (6) is substantially all in the inside of steel ring, obviously shorten the measuring distance of distance sensor component (6), the linear precision and repeat accuracy requirement of distance sensor component (6) is low, can use low cost distance sensor component (6), significantly reduce the cost of equipment, distance sensor component (6) relative to wheel assembly and main shaft motor (9) is in stationary motion state, first fill in the blank of domestic self-production this kind of balancing machine, overcome the problem that this kind of balancing machine can only import neck, realize domestic substitution.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle wheel assembly maintenance and diagnosis technical field, relate to the technical field of the unbalance and radial force uneven measurement diagnosis of wheel assembly, especially, relate to a kind of wheel assembly unbalance and radial uneven measurement diagnosis balancing machine and balance detection system. BACKGROUND

[0002] Vehicle in the process of driving on road, rotating wheel assembly can produce vibration, this vibration is usually caused by two reasons, one is due to wheel assembly unbalance, another is due to wheel assembly radial uneven.

[0003] So-called wheel assembly unbalance is that centrifugal force is generated when wheel assembly rotates due to uneven mass distribution. This imbalance can be divided into static imbalance and dynamic imbalance. Static imbalance refers to the center of gravity of wheel assembly deviates from the rotation axis in static state. Dynamic imbalance refers to the mass distribution in different planes is uneven when wheel assembly rotates at high speed, which leads to vibration. The main reasons of wheel assembly unbalance include uneven mass distribution during tire or hub manufacturing, uneven tire wear, hub processing error, improper installation, etc. When wheel assembly unbalance exceeds the limit value, the main performance is vibration and flutter when wheel assembly rotates, especially more obvious at high speed. This vibration will be transmitted to the vehicle body through the wheel assembly, which leads to steering wheel shaking, vehicle body instability, and affects driving comfort and safety. The amount of wheel assembly unbalance can be measured by dynamic balancing detection equipment, and balance block can be added to the edge of steel ring to correct mass distribution, so that wheel assembly unbalance is below the limit value.

[0004] So-called wheel assembly radial uneven is that there is unevenness in size, shape or stiffness in radial direction of wheel assembly. For example, radial deviation of tire is a performance of radial uneven, which refers to the maximum fluctuation of radial force when tire rotates under fixed load and constant speed. It is usually caused by size error in tire manufacturing process, material unevenness, inconsistent tread thickness, or tire deformation, uneven wear in use process, etc. When wheel assembly radial uneven exceeds the limit value, the main performance is up and down bouncing of wheel assembly during driving, which leads to vehicle bumping and flutter, especially obvious unevenness can be felt at low speed. Radial uneven of wheel assembly needs to detect radial deviation of wheel assembly, if it exceeds the standard range, then tire needs to be replaced or tire uniformity repair is needed.

[0005] The radial unevenness of the wheel assembly is the superposition of the radial unevenness of the rim and the radial unevenness of the tire. The average radial unevenness waveform of the wheel, the rim and the tire can be transformed into a first harmonic, a second harmonic or more through Fourier transform. When the radial unevenness of the wheel assembly exceeds a limit value, the radial unevenness of the wheel assembly can be reduced below the limit value by changing the relative position of the tire and the rim so that the high point of the first harmonic of the radial unevenness of the rim coincides with the low point of the first harmonic of the radial unevenness of the tire.

[0006] The radial unevenness of the tire is related to the uniformity of the materials inside the tire, and the measurement under the condition that the vehicle is driving on the road is more realistic. In the industry, a load device is usually used to press against the surface of the rotating tire under a certain load to measure the radial runout deviation of the load device, and the load force change of the load device can also be measured, both of which represent the unevenness of the wheel assembly. For example, Chinese patent CN201020677945.4 discloses a road force measurement system that can calculate the force of the wheel assembly and the radius error of the rim, and install the point with the smallest rim radius and the point with the largest tire load force together to minimize the radial force of the wheel assembly. U.S. patent US20010797443A discloses a wheel balancer with a load roller, comprising: a shaft adapted to receive a wheel / tire assembly, the shaft having a longitudinal axis and being rotatable about the longitudinal axis so as to rotate the wheel / tire assembly removably mounted thereon; a sensor assembly for measuring rotation of the shaft about the longitudinal axis; a vibration sensor assembly for measuring vibrations of the wheel / tire assembly as the wheel / tire assembly is rotated; a motor operably connected to the shaft for rotating the shaft, and thus the wheel / tire assembly, about the longitudinal axis; a load roller for applying a force greater than 150 pounds generally radially to the wheel / tire assembly during rotation of the wheel / tire assembly; and a control circuit responsive to measurements from the vibration sensor assembly to determine an imbalance. Chinese patent CN201220723711.8 discloses a road force tester, which is provided with a power rotating driving device and a rotating balance testing mechanism in a machine base, the output shaft of the power rotating driving device is connected with a flange plate, a display connected with the rotating balance testing mechanism is arranged above the machine base, a cover and a support plate are rotatably connected to the machine base, a friction wheel is arranged on the support plate, and a positioning piece is arranged between the cover and the machine base. However, the inner data arm is mainly used to collect vibration data in these patents, and the inner data arm is arranged on the box to prevent vibration. Similar equipment products such as Hunter GSP9700RFT (as shown in Figures 7-8 ), use the mode of inner data arm, and the inner data arm is arranged on the box.

[0007] In the field of wheel assembly radial unevenness measurement, distance measuring devices or distance sensing devices can be used to measure the radial unevenness of the rim, and the rim is rotated around the axis at the center of the rim to measure the radial runout deviation on the circumference of the rim. Distance sensing devices have linear accuracy and repeatability, and the longer the measured distance, the lower the linear accuracy and repeatability. Using a distance sensor with long distance and high accuracy will significantly increase the cost of the equipment.

[0008] The existing balancing machines in the art all choose to install the distance sensor on the box body in order to measure the radial unevenness of the rim, which results in that the distance sensor is far away from the wheel assembly on the main shaft, and a high-performance distance sensor is needed, which is high in equipment cost and low in market acceptance. At present, there is no product sold in the domestic market. Although some devices try to measure the distance by guiding the distance sensor to the vicinity of the wheel assembly, and then retracting the distance sensor after measurement, this scheme results in a complex device structure, and requires high accuracy of the overall conveying mechanism, which is also high in equipment cost.

[0009] Moreover, in the process of measuring the radial unevenness of the rim, a motor or other driving device is usually used to drive the rotation of the wheel assembly, and the vibration of the driving device will also affect the measurement accuracy of the radial runout deviation of the rim. At the same time, the vibration caused by the imbalance of the wheel assembly itself will also affect the measurement accuracy of the radial runout deviation of the rim.

[0010] In view of the above technical problems, the inventors of the present utility model provide a balancing machine with low cost, simple structure, high measurement accuracy, and load measurement and diagnosis functions of wheel assembly uniformity, which is not affected by the vibration of the wheel assembly and the main shaft driving motor, so as to fill the gap of such balancing machines in the domestic market and realize the domestic substitution of such balancing machines. SUMMARY

[0011] In view of the above technical problems, the inventors of the present utility model provide a balancing machine with low cost, simple structure, high measurement accuracy, and load measurement and diagnosis functions of wheel assembly uniformity, which is not affected by the vibration of the wheel assembly and the main shaft driving motor, so as to fill the gap of such balancing machines in the domestic market and realize the domestic substitution of such balancing machines.

[0012] To achieve the above-mentioned purpose, the present utility model provides the following technical scheme:

[0013] A balancing machine with load measurement and diagnosis functions of wheel assembly radial unevenness, comprising:

[0014] a box body (1) for fixing a main shaft support (7) and a load device (4), and a lead block cover (2) is installed at the upper end;

[0015] A lead block cover (2) is used to place the lead block for balancing the wheel assembly, and an industrial computer (3) is fixed at the upper end of the lead block cover (2);

[0016] The industrial computer (3) is used for signal processing and calculation of various sensors, has a function of displaying measurement results, has a key operation input function, controls the main shaft motor (9), drives the motor (6a), and controls the air bag (4d) to execute a series of programmed actions for measuring the imbalance and radial unevenness of the wheel assembly;

[0017] A main shaft (5) is used to fix the wheel assembly, and the main shaft (5) has a longitudinal axis, and the main shaft (5) is driven to rotate around its longitudinal axis by controlling the main shaft motor (9) to drive the wheel assembly to rotate;

[0018] A main shaft support (7) is used to fix the main shaft (5) and is configured to support the main shaft (5) to rotate around its longitudinal axis, and the main shaft support (7) receives the vibration of the rotating wheel assembly due to its own imbalance;

[0019] At least one distance sensor assembly (6) is used to measure the radial unevenness of the rim in the rotating wheel assembly;

[0020] At least one force sensor assembly (10) is used to measure the vibration of the rotating wheel assembly due to its own imbalance;

[0021] One end of the at least one force sensor assembly (10) is arranged on the main shaft support (7);

[0022] A load device (4) is used to adhere to the surface of the tire in the rotating wheel assembly with a certain load, and receives and measures the vibration of the rotating wheel assembly due to its radial unevenness;

[0023] At least one rotation sensor assembly (8) is used to measure the rotation of the main shaft (5) around its longitudinal axis;

[0024] One end of the at least one rotation sensor assembly (8) is arranged on the main shaft (5);

[0025] The rotation axis of the rotation sensor assembly (8) coincides with the longitudinal axis of the main shaft (5).

[0026] The at least one distance sensor assembly (6) is arranged on the main shaft support (7) and is arranged close to the side where the main shaft is installed with the wheel assembly;

[0027] The at least one distance sensor assembly (6) can be stopped at a position within a certain angle range, the fan formed by the swinging is substantially parallel to the longitudinal axis of the main shaft (5).

[0028] The distance sensor assembly (6) comprises a driving device (driving motor (6a)) and a distance sensor (6b), the driving motor (6a) can drive the distance sensor (6b) to swing.

[0029] The driving motor (6a) is arranged on the main shaft support (7) and is close to the side of the main shaft mounting wheel assembly, and is below the main shaft.

[0030] The driving motor (6a) has its own longitudinal axis, can drive the distance sensor (6b) to swing around its longitudinal axis, and can be locked and stopped at a position, the longitudinal axis is arranged in a direction substantially perpendicular to the longitudinal axis of the main shaft (5).

[0031] The driving motor (6a) can drive the distance sensor (6b) to swing within a specified angle range, and can be optionally stopped at a set angle, the fan formed by the swinging is substantially parallel to the longitudinal axis of the main shaft (5). Preferably, the specified angle range is 0°-160°, further preferably, the specified angle range is 0°-140°; 0°-120°; 0°-90°; 10°-80°; 20°-70°.

[0032] The balancing machine comprises a box body (1).

[0033] The balancing machine comprises at least one force sensor assembly (10), one end of the at least one force sensor assembly (10) is connected to the main shaft support (7), and the other end is connected to the box body (1).

[0034] The balancing machine comprises a main shaft support (7).

[0035] The main shaft support (7) comprises a vibration receiving structure, the vibration receiving structure comprises but is not limited to a support rotating sleeve (7a), a support right part (7b), a suspension structure (7c), a support left part (7d), and a support middle part (7f); one end of the at least one force sensor assembly (10) is connected to the vibration receiving structure.

[0036] The main shaft support (7) receives the vibration generated by the rotating wheel assembly due to its own imbalance, and transmits the vibration to the at least one force sensor (10).

[0037] The balancing machine comprises a main shaft motor (9), the main shaft motor (9) driving the rotation of the main shaft (5) is arranged on a main shaft support (7), the main shaft support (7) receives the vibration of the main shaft motor (9), so that the main shaft (5) and the distance sensor assembly (6) vibrate with the main shaft motor (9).

[0038] The balancing machine further comprises a load device (4).

[0039] The load device (4) comprises a pressing device (load roller (4a)), a motion conversion device (support shaft sleeve (4e), roller support (4b)) and a driving device (air bag 4d), the driving device (air bag (4d)) drives the motion conversion device (support shaft sleeve (4e), roller support (4b)) to move, the motion conversion device drives the pressing device (load roller (4a)) to move, and the pressing device is pressed on the surface of the tire in the wheel assembly with a certain load, preferably, the certain load is 10-1000 kg; preferably, the certain load is 100-800 kg; more preferably, the certain load is 200-600 kg.

[0040] The load device (4) receives the vibration generated by the radial unevenness of the rotating wheel assembly.

[0041] Preferably, the load device (4) comprises an angle sensor (4f), the rotating end of the angle sensor assembly (4f) is connected to the motion conversion device (support shaft sleeve (4e), roller support (4b)), and the non-rotating end is connected to the box body (1), and the load device (4) converts the vibration generated by the radial unevenness of the rotating wheel assembly into the angle change of the angle sensor assembly (4f).

[0042] Preferably, the load device (4) comprises a force sensor assembly, one end of the force sensor assembly is connected to the motion conversion device (shaft sleeve (4e), roller support (4b)), and the other end is connected to the box body (1), and the load device (4) converts the vibration generated by the radial unevenness of the rotating wheel assembly into the force change of the force sensor assembly.

[0043] The utility model also aims at providing a method for detecting the radial unevenness of the steel ring in the wheel assembly, which comprises the step of using the balancing machine with the load measurement wheel assembly radial unevenness and diagnosis function.

[0044] The utility model also aims at providing a balancing system with the load measurement wheel assembly radial unevenness and diagnosis function, which comprises the step of using the balancing machine with the load measurement wheel assembly radial unevenness and diagnosis function.

[0045] The utility model has the beneficial technical effect

[0046] The utility model provides a balancing machine with load measurement wheel assembly radial uneven and diagnostic function, overcomes the prejudice of prior art, first distance sensor assembly (6) is from only setting on the box (1), adjust to set on the main shaft support (7) on the one side close to wheel assembly, distance sensor assembly (6) is basically all in the inside of steel ring, the measuring distance of distance sensor assembly (6) is obviously shortened, the linear precision and the repeat accuracy requirement of distance sensor assembly (6) are lower, can select and use low -cost distance sensor assembly (6), the manufacturing cost of equipment is reduced significantly, only this one at least reduces equipment cost nearly 9000 yuan.

[0047] The utility model provides a balancing machine with load measurement wheel assembly radial uneven and diagnostic function, motor (6a) is fixed on the main shaft support (7), fixes distance sensor (6b) on the output shaft of motor (6a) through bolt mode etc., motor (6a) can drive distance sensor (6b) to swing in 0-160 ° angle range and stop in a position, motor locking, namely locking distance sensor assembly (6), cancels traditional horizontal transmission mechanism.

[0048] The utility model provides a balancing machine with load measurement wheel assembly radial uneven and diagnostic function, the main shaft motor (9) of driving the rotation of the main shaft (5) is set up on the main shaft support (7), and distance sensor assembly (6) is fixed on the main shaft support (7), and the main shaft support (7) receives the vibration of the main shaft motor (9), so that the main shaft (5) and distance sensor assembly (6) vibrate together with the main shaft motor (9). The main shaft support (7) receives the vibration of the rotating wheel assembly due to its own imbalance, so that the main shaft (5) and distance sensor assembly (6) vibrate together with the rotating wheel assembly due to its own imbalance. During the measurement of the radial unevenness of the steel ring by the distance sensor assembly (6), the wheel assembly, the main shaft motor (9) and the distance sensor assembly (6) vibrate together. This structure avoids the interference of the vibration of the wheel assembly and the main shaft motor (9) on the vibration of the distance sensor assembly (6). The distance sensor assembly (6) is in a static state relative to the wheel assembly and the main shaft motor (9), which significantly improves the measurement accuracy of the distance sensor assembly (6).

[0049] The balancing machine with load measurement wheel assembly radial uneven and diagnostic function provided by the utility model will fill the gap in the domestic production of such balancing machines for the first time, overcome the problem that such balancing machines can only be imported, and realize the replacement of domestic products. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 The utility model provides a right view before including lead block cover structure balance machine,

[0051] Figure 2 The utility model provides a left view behind including lead block cover structure balance machine,

[0052] Figure 3 The utility model provides a right view before not including lead block cover structure balance machine,

[0053] Figure 4 The utility model provides a left view before not including lead block cover structure balance machine,

[0054] Figure 5 The utility model provides a lower end view of balance machine main shaft,

[0055] Figure 6 The utility model provides a right view before main shaft and main shaft support of balance machine,

[0056] Figure 7 Hunt GSP9700RFT real object picture;

[0057] Figure 8 Hunt GSP9700RFT equipment composition;

[0058] In the figure: 1, box body;2, lead block cover;3, industrial computer all-in-one machine;4, load device;4a, load roller;4b, roller support;4c, support pivot;4d, air bag;4e, support shaft sleeve;4f, angle sensor assembly;5, main shaft;5a, flange;5b, screw;5c, cone;5d, nut;6, distance sensor assembly;6a, motor;6b, distance sensor;7, main shaft support;7a, support sleeve;7b, support right part;7c, suspension structure;7d support left part;7e, support bottom;7f support middle part;8, rotation sensor assembly;8a, photoelectric board;8b, code disc;9, main shaft motor;10, force sensor assembly. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the utility model.

[0060] EMBODIMENT

[0061] The utility model provides a kind of balancing machine with load measurement wheel assembly radial uneven and diagnostic function, as shown in Figures 1-4 It includes: box (1), lead block cover (2), industrial computer (3), load device (4), main shaft (5), distance sensor component (6), main shaft support (7), rotation sensor component (8), main shaft motor (9), force sensor component (10).

[0062] The main shaft (5) is used to fix wheel assembly, and the main shaft (5) has longitudinal axis, and drives wheel assembly to rotate around its longitudinal axis.

[0063] As shown in Figure 6 The main shaft (5) includes: flange (5a), screw (5b), cone (5c), nut (5d);The flange (5a) is used to stick to the center of the steel ring in wheel assembly, and keeps wheel assembly from rotating relative to the main shaft (5) by friction resistance.The cone (5c) is installed between the flange (5a) and the steel ring of wheel assembly, and is sleeved on the screw (5b), to keep the steel ring in wheel assembly concentric with the main shaft (5).The nut (15d) is threadedly connected with the screw (5b) to tightly adhere wheel assembly to the end face of the flange (5a), and fix wheel assembly on the main shaft (5).

[0064] The main shaft support (7) is used to fix the main shaft (5), fix the main shaft motor (9), fix the force sensor component (10), fix the distance sensor component (6).

[0065] As shown in Figure 6 The main shaft support (7) includes: support sleeve (7a), support right part (7b), suspension structure (7c), support left part (7d), support bottom (7e), support middle part (7f).

[0066] The lower part of the main shaft support (7) is provided with a support bottom (7e) which is welded on the box body (1) to fix the main shaft support (7) on the box body (1) as a whole. The upper part of the main shaft support (7) is provided with a support rotating sleeve (7a) for fixing the main shaft (5) and supporting the main shaft (5) to rotate around the longitudinal axis thereof. The right part of the main shaft support (7) is provided with a support right part (7b) on which the main shaft motor (9) is fixed, and the main shaft motor (9) drives the main shaft (5) to rotate around the longitudinal axis thereof at a certain speed through a belt or the like. The support right part (7b), the support left part (7d) and the support middle part (7f) of the main shaft support (7) form a vibration receiving structure of the main shaft support (7), which receives the vibration of the main shaft motor (9) and the vibration of the main shaft (5). The main shaft support (7) has a suspension structure (7c) which is connected to the vibration receiving structure of the main shaft support (7) at one end and connected to the support bottom (7e) at the other end, equivalent to being connected to the box body (1).

[0067] The main shaft support (7) is provided with a force sensor assembly (10) which is connected to the vibration receiving structure of the main shaft support (7) at one end and connected to the support bottom (7e) at the other end, equivalent to being connected to the box body (1). The suspension structure (7c) transmits the vibration received by the vibration receiving structure of the support (7) to the force sensor assembly (10). The main shaft support (7) receives the vibration of the main shaft motor (9) and the vibration generated by the rotation of the wheel assembly due to its own imbalance. The wheel assembly, the main shaft motor (9) and the distance sensor assembly (6) are arranged together in the vibration receiving structure of the main shaft support (7) and vibrate together.

[0068] The distance sensor assembly (6) is arranged on the support right part (7b) to measure the radial unevenness of the steel ring in the wheel assembly and scan the internal profile of the steel ring to determine the position of the lead block on the steel ring for balancing the wheel. Figure 5 As shown in the distance sensor assembly (6) includes a motor (6a) and a distance sensor (6b).

[0069] Table 1 Comparison of the distance sensor (6b) used by the balancing machine provided by the utility model and the distance sensor installed on the road force balancing machine of the box body

[0070] Model Price / Measuring distance Sd / mm

[0071] The distance sensor used by the balancing machine of the utility model is a laser displacement sensor OM30-P0350.HV.YUN with a tax-included unit price of 480050-350

[0072] The distance sensor laser ranging sensor used by the road force balancing machine in the prior art

[0073] OM70-L1000.HH1000.VI contains tax single price 13852.1 from 200-1000

[0074] The distance sensor (6b) is arranged on the main shaft support (7) of the balancing machine, and is arranged on the side close to the installed wheel assembly. The distance (≤350) measured by the distance sensor (6b) is reduced by more than half compared with the distance (≥700 mm) measured by the balancing machine with the distance sensor arranged on the box body. Therefore, a distance sensor with a shorter measuring distance can be selected. As shown in Table 1, the balancing machine provided by the utility model first adopts a distance sensor with a shorter measuring distance. Only this one item, at least 9000 yuan of cost can be saved.

[0075] The motor (6a) is arranged on the right part (7b) of the support and close to the side of the wheel assembly. The distance sensor (6b) is fixed on the output shaft of the motor (6a) by means of bolts or the like, and there is no transmission matching gap. The motor (6a) has its own longitudinal axis, can drive the distance sensor (6b) to swing within a certain angle range around the longitudinal axis, and is locked at a certain position. The longitudinal axis of the motor (6a) is arranged in a direction substantially perpendicular to the longitudinal axis of the main shaft (5).

[0076] The load device (4) is attached to the surface of the tire in the rotating wheel assembly with a certain load, receives and measures the vibration generated by the rotating wheel assembly due to its radial unevenness. As shown in Figures 2-3 The load device (4) includes a load roller (4a), a roller support (4b), a support shaft (4c), an air bag (4d), a support shaft sleeve (4e), and an angle sensor assembly (4f).

[0077] The support shaft sleeve (4e) is fixed at the rear end of the box body (1). The middle part of the roller support (4b) is provided with a support shaft (4c), and the protruding end of the support shaft (4c) is fixed in the support shaft sleeve (4e). The support shaft sleeve (4e) is provided with a bearing structure, and the support shaft (4c) can rotate around its own axis. The upper end of the roller support (4b) is fixedly provided with a load roller (4a), and the inside of the load roller (4a) is provided with a bearing structure. The load roller (4a) can rotate around its own axis.

[0078] An airbag (4d) is provided at the lower end of the roller bracket (4b). One end of the airbag (4d) is connected to the roller bracket (4b), and the other end is connected to the housing (1). The airbag (4d) is driven by compressed air, and control elements such as electromagnetic air control valves control the inflation, pressure holding, and deflation of the airbag (4d). When the airbag (4d) is inflated, it drives the roller bracket (4b) to rotate around the bracket shaft (4c), and the roller bracket (4b) drives the load roller (4a) to swing. The load roller (4a) is in contact with the outer surface of the tire in the wheel assembly. When the airbag (4d) is pressure held, it does not move, and the load roller (4a) is in contact with the outer surface of the tire with a certain load. When the airbag (4d) is deflated, the airbag (4d) drives the roller bracket (4b) to rotate around the bracket shaft (4c). The roller bracket (4b) drives the load roller (4a) to swing. The load roller (4a) leaves the outer surface of the tire in the wheel assembly and returns to its original position.

[0079] The rotating end of the angle sensor assembly (4f) is connected to the bracket shaft (4c) in the middle of the roller bracket (4b), and its rotation axis coincides with the axis of the bracket shaft (4c). The non-rotating end of the angle sensor assembly (4f) is connected to the housing (1) by means of springs, etc. The load roller (4a) is in contact with the outer surface of the tire in the wheel assembly with a certain load. The load roller (4a) receives the vibration generated by the radial unevenness of the rotating wheel assembly, which drives the bracket shaft (4c) in the middle of the roller bracket (4b) to rotate. The bracket shaft (4c) drives the angle sensor assembly (4f) to rotate. The load device (4) converts the vibration generated by the radial unevenness of the rotating wheel assembly into the angle change of the angle sensor assembly (4f).

[0080] The rotation sensor assembly (8) is used to measure the rotation of the spindle (5) about its longitudinal axis, such as Figure 6 As shown, the rotation sensor assembly is mounted on the main shaft support (7), and the rotation sensor assembly (8) includes a photoelectric plate (8a) and an encoder disk (8b).

[0081] The code disk (8b) is fixed on the main shaft (5) and has a rotation axis that coincides with the rotation axis of the main shaft (5). The main shaft (5) drives the code disk (8b) to rotate together. The outer circumference of the code disk (8b) has 128 uniform light-on / off teeth, and the circumferential arc distance between the teeth is equal. The photoelectric plate (8a) is fixed on the main shaft support (7) and has light-emitting / receiving components. The on / off signals of the 128 uniform teeth on the outer circumference of the rotating code disk (8b) are detected and amplified to 512. In fact, the rotation sensor assembly (8) measures the rotation angle accuracy of the main shaft (5) to be 0.714 degrees.

[0082] The lead block cover (2) is fixed to the upper end of the box (1) for placing lead blocks and other items.

[0083] The industrial control all-in-one computer (3) is fixed on the lead block cover (2).

[0084] In this example, the signals collected by each sensor are uploaded to the industrial control computer (3) via a circuit board. The industrial control computer (3) is responsible for the signal processing and calculation of each sensor.

[0085] The integrated industrial control computer (3) is responsible for processing and calculating the radial deviation signal of the steel ring measured by the distance sensor assembly (6), and aligning it with the signal of the rotation sensor assembly (8) in real time, converting it into Fourier harmonics, and measuring the radial non-uniformity at 512 phase angle positions on the circumference of the steel ring.

[0086] The integrated industrial control computer (3) is responsible for processing and calculating the load radial deviation signal of the wheel assembly measured by the angle sensor assembly (4f), and aligning it with the rotation sensor assembly (8) in real time, converting it into Fourier harmonics, and measuring the radial non-uniformity at 512 phase angle positions on the circumference of the wheel assembly.

[0087] The integrated industrial control computer (3) is responsible for calculating the load radial deviation signal of the wheel assembly minus the radial deviation signal of the steel rim. It is also aligned with the rotation sensor assembly (8) in real time, converting it into Fourier harmonics, and calculating the radial non-uniformity at 512 phase angle positions on the tire circumference.

[0088] The integrated industrial control computer (3) is responsible for processing and calculating the imbalance signal of the wheel assembly measured by the force sensor assembly (10), and aligning with the rotation sensor assembly (8) in real time to measure the size of the lead block to be pasted at a certain phase angle position among the 512 on the circumference of the steel ring.

[0089] The industrial control all-in-one computer (3) also has the function of displaying measurement results:

[0090] The industrial control computer (3) displays the magnitude of the wheel assembly imbalance, which is the size of the lead block required to balance the wheel.

[0091] The wheel assembly is manually rotated, and the industrial control computer (3) displays the phase angle of wheel imbalance in real time, which is the phase angle position of the lead block placed on the circumference of the steel ring.

[0092] The wheel assembly is manually rotated, and the industrial control computer (3) displays the radial non-uniform harmonic waveform of the wheel assembly in real time, that is, the radial non-uniformity of the wheel assembly and the phase angle position.

[0093] The wheel assembly is manually rotated, and the industrial control computer (3) displays the radial non-uniform harmonic waveform of the steel ring in real time, that is, the size and phase angle position of the radial non-uniformity of the steel ring.

[0094] The wheel assembly is manually rotated, and the industrial control computer (3) displays the radial non-uniform harmonic waveform of the tire in real time, that is, the size and phase angle position of the radial non-uniformity of the tire.

[0095] The industrial control all-in-one computer (3) also has a key operation input function to control the spindle motor (9), the motor (6a), and the airbag (4d) to perform a series of programmed actions to measure the imbalance and radial non-uniformity of the wheel assembly.

[0096] The industrial control computer (3) can control the spindle motor (9) to start, stop, and rotate at a certain speed and in a certain direction.

[0097] The industrial control integrated computer (3) can control the inflation, pressure maintenance, and deflating of the airbag (4d).

[0098] The industrial control integrated computer (3) can control the motor (6a) to start, stop, and rotate at a certain speed and in a certain direction, and can also control it to stop at a certain position and lock the motor (6a).

[0099] Application Examples

[0100] The operator fixes the wheel assembly to the main shaft (5), presses the "Start" button on the interface of the industrial control computer (3), starts the main shaft motor (9), and increases the speed in a certain direction until the main shaft (5) reaches a certain number of revolutions, such as 300 revolutions per minute, and starts constant speed unbalance measurement rotation, rotating a specified number of revolutions, such as 30 revolutions. During the unbalance measurement rotation, the force sensor assembly (10) measures the unbalance signal of the wheel assembly, the rotation sensor assembly (8) measures the rotation of the main shaft (5), the industrial control computer (3) calculates the unbalance of the wheel assembly, and measures the size of the lead block that should be pasted at a certain phase angle position among the 512 on the circumference of the steel rim.

[0101] During the unbalanced rotation measurement process, the motor (6a) is started, the distance sensor (6b) is swung, the inner contour of the steel ring is scanned, and then the distance sensor (6b) is swung to a point on the inner contour of the steel ring to measure the radial deviation of the steel ring. A specified number of rotations are measured, such as 6 rotations. The industrial control integrated computer (3) is responsible for processing and calculating the radial deviation signal of the steel ring measured by the distance sensor assembly (6), and aligning it with the signal of the rotation sensor assembly (8) in real time. It converts the signal into Fourier harmonics and measures the radial non-uniformity at 512 phase angle positions on the circumference of the steel ring.

[0102] After the unbalanced rotation measurement is completed, the airbag (4d) is inflated, causing the roller bracket (4b) to rotate around the bracket shaft (4c). The roller bracket (4b) causes the load roller (4a) to swing and adhere to the outer surface of the tire in the wheel assembly. The airbag (4d) is kept pressurized and its position remains unchanged. The load roller (4a) adheres to the outer surface of the tire in the wheel assembly with a certain load. While the airbag (4d) is inflated, the spindle motor (9) is decelerated in its original direction until the spindle (5) reaches a certain speed, such as 75 rpm, and then constant speed radial measurement rotation begins, rotating a specified number of times, such as 6 times. During the radial measurement rotation, the industrial control computer (3) is responsible for processing and calculating the load radial deviation signal of the wheel assembly measured by the angle sensor assembly (4f), aligning it with the rotation sensor assembly (8) in real time, converting it into Fourier harmonics, and measuring the radial non-uniformity at 512 phase angle positions on the circumference of the wheel assembly. Meanwhile, the integrated industrial control computer (3) is responsible for calculating the load radial deviation signal of the wheel assembly minus the radial deviation signal of the steel rim. It is also aligned with the rotation sensor assembly (8) in real time, converting it into Fourier harmonics, and calculating the radial non-uniformity at 512 phase angle positions on the tire circumference.

[0103] After the radial measurement rotation is completed, the airbag (4d) is deflated, and the load roller (4a) moves away from the tire surface in the wheel assembly and returns to its original position. Simultaneously with deflating the airbag (4d), the spindle motor (9) begins to decelerate until it stops, at which point all measurements are complete.

[0104] The operator observes the measurement results through the industrial control computer (3): including the size of the lead block required to balance the wheel; the phase angle position of the lead block placed on the circumference of the steel rim; the size and phase angle position of the radial unevenness of the wheel set; the size and phase angle position of the radial unevenness of the steel rim; and the size and phase angle position of the radial unevenness of the tire.

[0105] When the imbalance of the wheel assembly is less than the limit and the radial unevenness of the wheel is less than the limit, the wheel assembly will not vibrate.

[0106] When the wheel assembly imbalance is greater than or equal to the limit, or the radial non-uniformity of the wheel assembly is less than the limit, the wheel will vibrate, and the operator needs to balance the wheel.

[0107] Select the desired lead weight as shown on the interface of the industrial control all-in-one machine (3).

[0108] As shown on the interface of the industrial control all-in-one machine (3), a lead block is pasted at a certain phase angle position on the circumference of the specified steel ring.

[0109] Press the "Start" button to re-measure the wheel imbalance and unevenness to confirm that the wheel is balanced to a qualified state.

[0110] When the radial non-uniformity of a wheel assembly is greater than or equal to the limit, the wheel assembly will vibrate. The operator needs to first radially match the rim and tire, aligning the high point of the first harmonic of the radial non-uniformity of the rim with the low point of the first harmonic of the radial non-uniformity of the tire, so that the radial non-uniformity of the wheel is below the limit.

[0111] According to the interface of the industrial control all-in-one machine (3), mark the high point of the first harmonic of the radial non-uniformity of the steel ring.

[0112] According to the interface of the industrial control integrated machine (3), mark the low point of the first harmonic of the radial non-uniformity of the tire.

[0113] Remove the wheel assembly from the balancing machine; then, on equipment such as a tire changer, rotate the tire relative to the rim so that the rim markings match the tire markings.

[0114] Reinstall the wheels onto the balancing machine, press the "Start" button, and repeat the wheel imbalance and unevenness measurement to confirm the repair results.

[0115] At this point, if the imbalance of the wheel assembly is greater than or equal to the limit, the wheel assembly needs to be balanced so that the imbalance and radial non-uniformity of the wheel assembly are both less than their respective limits.

[0116] Once again, perform imbalance and unevenness measurements on the wheel assembly to confirm the repair results.

[0117] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A balancing machine for measuring radial non-uniformity of a wheel assembly, comprising: A load device (4), a main shaft (5), at least one distance sensor (6b), and a main shaft support (7) are characterized in that the main shaft (5) is mounted on the main shaft support (7), the at least one distance sensor (6b) is mounted on the main shaft support (7), the at least one distance sensor (6b) is located near the side of the main shaft (5) where the wheel assembly is mounted, and at least one function of the distance sensor (6b) is to measure the radial non-uniformity of the steel rim in the wheel assembly.

2. A balancing machine for measuring radial non-uniformity of wheel assemblies according to claim 1, characterized in that, The balancing machine includes a distance sensor assembly (6) and a driving device for the distance sensor assembly (6). The driving device can drive the distance sensor (6b) to swing within a specified angle range and can be selected to stop at a specified angle.

3. A balancing machine for measuring radial non-uniformity of wheel assemblies according to claim 2, characterized in that, The fan-shaped surface formed by the swing is roughly parallel to the longitudinal axis of the main shaft (5).

4. A balancing machine for measuring radial non-uniformity of wheel assemblies according to claim 2, characterized in that, The specified angle range is 0°-160°.

5. A balancing machine for measuring radial non-uniformity of a wheel assembly according to any one of claims 1-4, characterized in that, The balancing machine also includes at least one force sensor assembly (10), one end of which is connected to the main shaft support (7).

6. A balancing machine for measuring radial non-uniformity of wheel assemblies according to claim 5, characterized in that, The main shaft support (7) includes a vibration receiving structure, which includes a support rotating sleeve (7a), a right support (7b), a suspension structure (7c), a left support (7d), and a middle support (7f); one end of the at least one force sensor assembly (10) is connected to the vibration receiving structure; the distance sensor (6b) is disposed on the right support (7b).

7. A balancing machine for measuring radial non-uniformity of wheel assemblies according to claim 1, characterized in that, The load device (4) includes a motion conversion device and a pressing device. The motion conversion device includes a roller bracket (4b), and the pressing device is rotatable relative to the roller bracket (4b).

8. A balancing machine for measuring radial non-uniformity of wheel assemblies according to claim 7, characterized in that, The balancing machine includes at least one angle sensor assembly (4f), one end of which is connected to the roller support (4b).

9. A balancing machine for measuring radial non-uniformity of a wheel assembly according to claim 7, characterized in that, The load device (4) includes at least one force sensor, one end of which is connected to the motion conversion device.

10. A balancing machine for measuring radial non-uniformity of a wheel assembly according to claim 1, characterized in that, The balancing machine includes at least one rotation sensor assembly (8), which includes a photoelectric plate (8a) and a code disk (8b). The photoelectric plate (8a) is disposed on the main shaft support (7), and the code disk (8b) is disposed on the main shaft (5).

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