A balancing machine having a load measuring wheel assembly radial unevenness and diagnostic function

Abstract

The utility model provides a kind of balancing machine with load measuring wheel assembly radial uneven and diagnostic function, comprising: load device (4), main shaft (5), at least one distance sensor component (6), main shaft support (7), at least one rotation sensor component (8), the main shaft (5) is set on main shaft support (7), at least one distance sensor component (6) is set on main shaft support (7), at least one distance sensor component (6) is set on the side close to the main shaft (5) installation wheel assembly, at least one function of the distance sensor component (6) is for measuring the radial uneven of the steel ring in the rotating wheel assembly.The utility model is low to the linear precision and repeat accuracy requirement of distance sensor component (6), can use low cost distance sensor component (6), significantly reduce the cost of equipment, fill in the blank of domestic self-production this kind of balancing machine, overcome the problem that this kind of balancing machine can only be imported, realize domestic substitution.

Description

Technical Field

[0001] This utility model relates to the field of vehicle wheel assembly repair and diagnosis technology, to the field of wheel assembly imbalance and radial force non-uniformity measurement and diagnosis technology, and in particular to a wheel assembly imbalance and radial non-uniformity measurement and diagnosis balancing machine and balancing detection system. Background Technology

[0002] When a vehicle is driving on the road, the rotating wheel assembly will vibrate. This vibration is usually caused by two reasons: one is the imbalance of the wheel assembly, and the other is the radial unevenness of the wheel assembly.

[0003] Wheel assembly imbalance refers to the centrifugal force generated by uneven mass distribution during wheel assembly rotation. This imbalance can be divided into static imbalance and dynamic imbalance. Static imbalance refers to the wheel assembly's center of gravity deviating from the axis of rotation when stationary. Dynamic imbalance refers to the uneven mass distribution on different planes during high-speed rotation of the wheel assembly, leading to vibration. The main causes of wheel assembly imbalance include uneven mass distribution during tire or rim manufacturing, uneven tire wear, rim processing errors, and improper installation. When the wheel assembly imbalance exceeds the limit, it mainly manifests as vibration and tremors during wheel assembly rotation, especially noticeable at high speeds. This vibration is transmitted to the vehicle body through the wheel assembly, causing steering wheel vibration and vehicle instability, affecting driving comfort and safety. The imbalance of the wheel assembly can be measured using dynamic balancing equipment, and balance weights can be added to the edge of the rim to correct the mass distribution and bring the wheel assembly imbalance below the limit.

[0004] Radial non-uniformity of a wheel assembly refers to non-uniformity in size, shape, or stiffness of the wheel assembly in the radial direction. For example, radial deviation of a tire is a manifestation of radial non-uniformity; it refers to the maximum fluctuation in radial force experienced by the tire when rotating under a fixed load and constant speed. This is usually caused by dimensional errors, material inhomogeneity, inconsistent tread thickness during tire manufacturing, or deformation and uneven wear during tire use. When radial non-uniformity of the wheel assembly exceeds the limit, it mainly manifests as up-and-down bouncing of the wheel assembly during driving, causing vehicle bumps and vibrations, especially noticeable at low speeds. Radial non-uniformity of the wheel assembly requires inspection of the radial deviation; if it exceeds the standard range, the tire needs to be replaced or tire uniformity repair should be performed.

[0005] A wheel assembly consists of a steel rim and a tire. Radial non-uniformity in the wheel assembly is the superposition of radial non-uniformity in the steel rim and tire. Fourier transform can be used to convert the actual radial non-uniformity waveform per rim of the wheel, rim, and tire into first, second, or more harmonics. When the radial non-uniformity of the wheel assembly exceeds the limit, the radial non-uniformity can be reduced to below the limit by changing the relative position of the tire and rim, aligning the high point of the first harmonic of the steel rim's radial non-uniformity with the low point of the first harmonic of the tire's radial non-uniformity.

[0006] Tire radial non-uniformity is related to the uniformity of the tire's internal materials, and measurements simulating the vehicle's driving conditions on the road are more realistic. In the industry, a load device is typically used to apply a certain load to the rotating tire surface, measuring the radial runout deviation of the load device. The change in load force can also be measured; both represent non-uniformity in 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 rim radius error, aligning points with smaller rim radii with points of maximum tire load force to minimize the radial force of the wheel assembly. US Patent US20010797443A discloses a wheel balancer with a load roller, comprising: an axle adapted to receive a wheel / tire assembly having a longitudinal axis and rotatable about the axis, thereby rotating a wheel / tire assembly detachably mounted thereon; a sensor assembly for measuring rotation of the axle about the longitudinal axis; a vibration sensor assembly for measuring vibration of the wheel / tire assembly as it rotates; a motor operatively connected to the axle for rotating the axle about the longitudinal axis, thereby rotating the wheel / tire assembly; a load roller for applying a force greater than 150 pounds in a generally radial direction to the wheel / tire assembly during rotation; and control circuitry responding to measurements from the vibration sensor assembly to determine an imbalance. Chinese patent CN201220723711.8 discloses a road force tester, which includes a power rotation drive device and a rotational balance testing mechanism installed inside the base. The output shaft of the power rotation drive device is connected to a flange. A display connected to the rotational balance testing mechanism is located above the base. A cover and a support plate are rotatably connected to the base, and a friction wheel is mounted on the support plate. A positioning component is provided between the cover and the base. However, these patents mainly use an internal data arm to collect vibration data, and all of them place the internal data arm on the housing to prevent vibration. Similar equipment products include the Hunter GSP9700RFT (e.g., Figure 7-8 As shown, it adopts an internal data arm mode, and the internal data arm is set on the cabinet.

[0007] In the field of measuring radial non-uniformity in wheel assemblies, distance measuring devices or distance sensors can be used to measure the radial non-uniformity of the rim. The rim is rotated around its center axis, and the radial runout deviation on the rim's circumference is measured. Distance sensors have linear accuracy and repeatability; the longer the measurement distance, the lower the linear accuracy and repeatability. Using distance sensors with long distances and high accuracy will lead to a significant increase in equipment costs.

[0008] Existing balancing machines in this field, in order to measure radial unevenness of the steel rim, all choose to mount the distance sensor on the housing. This results in a large distance between the distance sensor and the wheel assembly on the main shaft, requiring high-performance distance sensors, leading to high equipment costs and low market acceptance; currently, no such products are sold in China. Although some devices have attempted to use guide rails or other methods to place the distance sensor near the wheel assembly for measurement, and then retract the sensor after measurement, this approach results in a complex equipment structure and requires very high precision in the overall transmission mechanism, also leading to high equipment costs.

[0009] Furthermore, in the process of measuring radial non-uniformity of the steel rim, a drive device such as a motor is usually used to drive the wheel assembly to rotate. The vibration of the drive device will also affect the accuracy of the radial runout deviation measurement of the steel rim. At the same time, the vibration caused by the imbalance of the wheel assembly itself will also affect the accuracy of the radial runout deviation measurement of the steel rim.

[0010] In view of this, the inventor of this utility model addresses the above-mentioned technical problems by providing a balancing machine that is low in cost, simple in structure, unaffected by the vibration of wheel assembly and main shaft drive motor, and has high measurement accuracy, with load measurement of wheel assembly uniformity and diagnostic functions, in order to fill the gap in domestic balancing machines of this type and realize the domestic substitution of this type of balancing machine. Summary of the Invention

[0011] In view of the technical problems of the existing technology where the distance sensor measures the radial unevenness of the wheel assembly and all of them are set on the housing at a distance, resulting in high equipment cost, the purpose of this utility model is to provide a balancing machine with load measurement and diagnostic functions for the radial unevenness of the wheel assembly, which greatly shortens the distance between the distance sensor assembly and the wheel assembly, overcomes the bias of the existing technology, and achieves the technical effect of resonance of the wheel assembly, the main shaft motor (9) and the distance sensor assembly (6), so as to solve the problem of high equipment cost.

[0012] To achieve the above objectives, this utility model provides the following technical solution: A balancing machine with load measurement and diagnostic functions for radial unevenness of wheel assemblies includes: The housing (1) is used to fix the spindle support (7), fix the load device (4), and install a lead block cover (2) at the top. Lead block cover (2) is used to place adhesive lead blocks for the balance wheel assembly, and an industrial control integrated machine (3) is fixed at the top. The industrial control all-in-one computer (3) is used for signal processing and calculation of various sensors, has the function of displaying measurement results, has the function of key operation input, and controls the spindle motor (9), drive motor (6a), and airbag (4d) to perform a series of programmed actions to measure the imbalance and radial non-uniformity of the wheel assembly. The main shaft (5) is used to fix the wheel assembly. The main shaft (5) has a longitudinal axis and can be driven to rotate around its longitudinal axis by controlling the main shaft motor (9) to drive the wheel assembly to rotate. A main shaft support (7) is provided on the main shaft (5). The main shaft support (7) is used to fix the main shaft (5) and is configured to support the main shaft (5) to rotate about its longitudinal axis. The main shaft support (7) receives the vibration generated by the rotating wheel assembly due to its own imbalance. The main shaft support (7) is provided on the housing (1). At least one distance sensor assembly (6), at least one function of which is to measure the radial non-uniformity of the steel rim in the rotating wheel assembly; At least one force sensor assembly (10) is used to measure the vibration of the rotating wheel assembly due to its own imbalance; One end of the at least one force sensor assembly (10) is disposed on the main shaft support (7); The load device (4) is used to attach to the surface of the tire in the rotating wheel assembly with a certain load, and to receive and measure the vibration of the rotating wheel assembly due to its radial non-uniformity. At least one rotation sensor assembly (8) is used to measure the rotation of the spindle (5) about its longitudinal axis; One end of the at least one rotary sensor assembly (8) is disposed on the main shaft (5); The rotation axis of the rotary sensor assembly (8) coincides with the longitudinal axis of the main shaft (5).

[0013] The at least one distance sensor assembly (6) is disposed on the main shaft bracket (7) and is disposed on the side near the main shaft mounting wheel assembly; The at least one distance sensor assembly (6) can swing within a certain angle range and stop at a certain position, the fan-shaped area formed by the swing being substantially parallel to the longitudinal axis of the main shaft (5).

[0014] The distance sensor assembly (6) includes a drive device (drive motor (6a)) and a distance sensor (6b), wherein the drive motor (6a) is capable of driving the distance sensor (6b) to swing.

[0015] The drive motor (6a) is mounted on the main shaft bracket (7) and is located below the main shaft, near the side where the wheel assembly is mounted on the main shaft.

[0016] The drive motor (6a) has its own longitudinal axis, which can drive the distance sensor (6b) to swing about its longitudinal axis and can be locked at a certain position. The longitudinal axis is arranged in a direction substantially perpendicular to the longitudinal axis of the main shaft (5).

[0017] The drive motor (6a) can drive the distance sensor (6b) to swing within a specified angle range, and can selectively stop at a set angle. The fan-shaped area formed by the swing is approximately parallel to the longitudinal axis of the main shaft (5). Preferably, the specified angle range is 0°-160°, and more preferably, the specified angle range is 0°-140°; 0°-120°; 0°-90°; 10°-80°; 20°-70°.

[0018] The balancing machine includes a housing (1).

[0019] The balancing machine includes at least one force sensor assembly (10), one end of which is connected to the main shaft support (7) and the other end is connected to the housing (1).

[0020] The balancing machine includes a main shaft support (7).

[0021] The main shaft support (7) includes a vibration receiving structure, which includes, 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.

[0022] The main shaft support (7) receives vibrations generated by the unbalance of the rotating wheel assembly and transmits the vibrations to the at least one force sensor (10).

[0023] The balancing machine includes a spindle motor (9), which drives the spindle (5) to rotate. The spindle motor (9) is mounted on a spindle support (7). The spindle support (7) receives the vibration of the spindle motor (9), causing the spindle (5) and the distance sensor assembly (6) to vibrate together with the spindle motor (9).

[0024] The balancing machine also includes a load device (4).

[0025] The load device (4) includes a pressing device (load roller (4a)), a motion conversion device (bracket bushing (4e), roller bracket (4b)) and a drive device (airbag 4d). The drive device (airbag (4d)) drives the motion conversion device (bracket bushing (4e), roller bracket (4b)) to move. The motion conversion device drives the pressing device (load roller (4a)) to move. The pressing device presses the surface of the tire in the wheel assembly with a certain load. Preferably, the certain load is 10 kg to 1000 kg; preferably, the certain load is 100 kg to 800 kg; more preferably, the certain load is 200 kg to 600 kg.

[0026] The load device (4) receives the vibrations generated by the rotating wheel assembly due to its overall radial non-uniformity.

[0027] Preferably, the load device (4) includes an angle sensor (4f), the rotating end of the angle sensor assembly (4f) is connected to the motion conversion device (bracket bushing (4e), roller bracket (4b)) and the non-rotating end is connected to the housing (1). The load device (4) converts the vibration of the rotating wheel assembly due to its overall radial non-uniformity into the angle change of the angle sensor assembly (4f).

[0028] Preferably, the load device (4) includes a force sensor assembly, one end of which is connected to the motion conversion device (sleeve (4e), roller bracket (4b)) and the other end is connected to the housing (1). The load device (4) converts the vibration of the rotating wheel assembly caused by its overall radial non-uniformity into the force change of the force sensor assembly.

[0029] The present invention also aims to provide a method for detecting radial non-uniformity of steel rims in wheel assemblies, including the step of using a balancing machine with load measurement and diagnostic functions for radial non-uniformity of wheel assemblies.

[0030] The purpose of this utility model is also to provide a balancing system with load measurement and diagnostic function for radial unevenness of wheel assembly, including the steps of using the balancing machine with load measurement and diagnostic function for radial unevenness of wheel assembly.

[0031] Beneficial technical effects of this utility model The balancing machine provided by this utility model, which has the function of measuring radial unevenness of wheel assembly under load and diagnosis, overcomes the bias of the prior art. For the first time, the distance sensor assembly (6) is adjusted from being able to be set on the housing (1) to being set on the main shaft support (7). Moreover, on the side close to the wheel assembly, the distance sensor assembly (6) is basically all inside the steel rim, which significantly shortens the measurement distance of the distance sensor assembly (6). The requirements for the linear accuracy and repeatability of the distance sensor assembly (6) are lower, and a low-cost distance sensor assembly (6) can be selected to be used, which significantly reduces the manufacturing cost of the equipment. This alone reduces the equipment cost by at least 9,000 yuan.

[0032] The balancing machine provided by this utility model, which has the function of measuring radial unevenness of wheel assembly under load and diagnosis, has a motor (6a) fixed on the main shaft bracket (7). The distance sensor (6b) is fixed on the output shaft of the motor (6a) by bolts or other means. The motor (6a) can drive the distance sensor (6b) to swing within the 0-160° angle range and stop at a certain position. The motor locks, that is, locks the distance sensor assembly (6), thus eliminating the need for the traditional horizontal transmission mechanism. During the measurement of radial unevenness of the steel wheel, the distance sensor assembly (6) does not have any self-vibration caused by the clearance of the horizontal transmission mechanism. This structural solution is simple and improves the measurement accuracy.

[0033] The balancing machine provided by this utility model, which has the function of measuring radial unevenness of wheel assembly under load and diagnosis, has a main shaft motor (9) that drives the main shaft (5) to rotate, which is mounted on the main shaft support (7). The distance sensor assembly (6) is fixed on the 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 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 the distance sensor assembly (6) vibrate together with the rotating wheel assembly due to its own imbalance. During the process of measuring the radial unevenness of the steel ring, the wheel assembly, the main shaft motor (9), and the distance sensor assembly (6) vibrate together. This structural solution 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 stationary motion state relative to the wheel assembly and the main shaft motor (9), which significantly improves the measurement accuracy of the distance sensor assembly (6).

[0034] The balancing machine provided by this utility model, which has the function of measuring and diagnosing radial unevenness of wheel assembly under load, will fill the gap in the domestic production of this type of balancing machine for the first time, overcome the bottleneck problem that this type of balancing machine can only be imported, and realize domestic substitution. Attached Figure Description

[0035] Figure 1The present invention provides a front right view of a balancing machine with a lead block cover structure; Figure 2 The present invention provides a rear left view of a balancing machine with a lead block cover structure; Figure 3 The present invention provides a front right view of a balancing machine excluding the lead block cover structure. Figure 4 The front left view of the balancing machine excluding the lead block cover structure provided by this utility model; Figure 5 This utility model provides a view of the lower end of the main shaft of the balancing machine. Figure 6 The balancing machine provided by this utility model has a front right view of its main shaft and main shaft support. Figure 7 Actual image of Hunter GSP9700RFT; Figure 8 Components of the Hunter GSP9700RFT device; In the diagram: 1. Housing; 2. Lead block cover; 3. Industrial control all-in-one computer; 4. Load device; 4a. Load roller; 4b. Roller bracket; 4c. Bracket shaft; 4d. Airbag; 4e. Bracket bushing; 4f. Angle sensor assembly; 5. Spindle; 5a. Flange; 5b. Lead screw; 5c. Cone; 5d. Nut; 6. Distance sensor assembly; 6a. Motor; 6b. Distance sensor; 7. Spindle bracket; 7a. Bracket rotating sleeve; 7b. Right side of bracket; 7c. Suspension structure; 7d. Left side of bracket; 7e. Bottom of bracket; 7f. Middle part of bracket; 8. Rotation sensor assembly; 8a. Photoelectric plate; 8b. Encoder disk; 9. Spindle motor; 10. Force sensor assembly. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Example This utility model provides a balancing machine with load measurement and diagnostic functions for radial unevenness of wheel assemblies, such as... Figure 1-4 As shown, it includes: housing (1), lead block cover (2), industrial control all-in-one computer (3), load device (4), spindle (5), distance sensor assembly (6), spindle support (7), rotation sensor assembly (8), spindle motor (9), and force sensor assembly (10).

[0038] The main shaft (5) is used to fix the wheel assembly. The main shaft (5) has a longitudinal axis and drives the wheel assembly to rotate about its longitudinal axis.

[0039] like Figure 6 As shown, the main shaft (5) includes: a flange (5a), a lead screw (5b), a cone (5c), and a nut (5d). The flange (5a) is used to press against the center of the steel rim in the wheel assembly, and through frictional resistance, keeps the wheel assembly from rotating relative to the main shaft (5). The cone (5c) is installed between the flange (5a) and the steel rim of the wheel assembly, and is fitted onto the lead screw (5b) to keep the steel rim in the wheel assembly concentric with the main shaft (5). The nut (5d) is threadedly connected to the lead screw (5b), pressing the wheel assembly tightly against the end face of the flange (5a) and fixing the wheel assembly onto the main shaft (5).

[0040] The spindle bracket (7) is used to fix the spindle (5), the spindle motor (9), the force sensor assembly (10), and the distance sensor assembly (6).

[0041] like Figure 6 As shown, the main shaft support (7) includes: a support rotating sleeve (7a), a support right part (7b), a suspension structure (7c), a support left part (7d), a support bottom (7e), and a support middle part (7f).

[0042] The lower part of the spindle support (7) is provided with a support bottom (7e), which is welded to the housing (1) to fix the spindle support (7) as a whole to the housing (1). The upper part of the spindle support (7) is provided with a support rotating sleeve (7a) for fixing the spindle (5) and configured to support the spindle (5) to rotate around its longitudinal axis. The right part of the spindle support (7) is provided with a support right part (7b), on which the spindle motor (9) is fixedly installed. The spindle motor (9) drives the spindle (5) to rotate around its own longitudinal axis at a certain speed through a belt or other means. The support right part (7b), support left part (7d), and support middle part (7f) of the spindle support (7) constitute the vibration receiving structure of the spindle support (7). The vibration receiving structure receives the vibration of the spindle motor (9) and the vibration of the spindle (5). The main shaft support (7) has a suspension structure (7c). One end of the suspension structure (7c) is connected to the vibration receiving structure of the main shaft support (7), and the other end is connected to the bottom of the support (7e), which is equivalent to being connected to the box (1).

[0043] The main spindle support (7) is equipped with a force sensor assembly (10). One end of the force sensor assembly (10) is connected to the vibration receiving structure of the main spindle support (7), and the other end is connected to the bottom (7e) of the support, which is equivalent to being connected to the housing (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 spindle support (7) receives the vibration of the main spindle motor (9) and the vibration of the rotating wheel assembly transmitted from the main spindle (5) due to its own imbalance. The wheel assembly, the main spindle motor (9), and the distance sensor assembly (6) are all located on the vibration receiving structure of the main spindle support (7) and vibrate together.

[0044] The distance sensor assembly (6) is mounted on the right side (7b) of the bracket to measure the radial unevenness of the steel rim in the wheel assembly, and simultaneously scans the internal contour of the steel rim to determine the position of the lead weights for balancing the wheel on the steel rim. Figure 5 As shown, the distance sensor assembly (6) includes a motor (6a) and a distance sensor (6b).

[0045] Table 1. Comparison of the balancing machine provided by this utility model and the distance sensor (6b) used in a road force balancing machine that mounts the distance sensor on the housing.

[0046] Because the balancing machine provided by this utility model has the distance sensor (6b) mounted on the main shaft bracket (7), located near the wheel assembly, the distance measured by the distance sensor (6b) (≤350 mm) is more than half that of the balancing machine with the distance sensor mounted on the housing (≥700 mm). Therefore, a distance sensor with a shorter measuring distance can be selected. As can be seen from Table 1, the balancing machine provided by this utility model is the first to use a distance sensor with a shorter measuring distance, which alone will save at least 9,000 yuan in costs.

[0047] The motor (6a) is mounted on the right side (7b) of the bracket, near the wheel assembly. The distance sensor (6b) is fixed to the output shaft of the motor (6a) by bolts or other means, with no transmission clearance. The motor (6a) has its own longitudinal axis, which can drive the distance sensor (6b) to swing around its longitudinal axis within a certain angle range and lock it in a certain position. The longitudinal axis of the motor (6a) is arranged in a direction that is substantially perpendicular to the longitudinal axis of the main shaft (5).

[0048] The load device (4) is attached 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 caused by its radial non-uniformity. Figure 2-3As shown, the load device (4) includes: a load roller (4a), a roller support (4b), a support shaft (4c), an airbag (4d), a support bushing (4e), and an angle sensor assembly (4f).

[0049] The support bushing (4e) is fixed to the rear end of the housing (1). A support shaft (4c) is provided in the middle of the roller support (4b). The protruding end of the support shaft (4c) is fixed inside the support bushing (4e). A bearing structure is provided inside the support bushing (4e). The support shaft (4c) can rotate around its own axis. A load roller (4a) is fixedly provided at the upper end of the roller support (4b). A bearing structure is provided inside the load roller (4a). The load roller (4a) can rotate around its own axis.

[0050] 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.

[0051] 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).

[0052] The rotation sensor assembly (8) is used to measure the rotation of the spindle (5) about its longitudinal axis, such as Figure 6As 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).

[0053] 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.

[0054] The lead block cover (2) is fixed to the upper end of the box (1) for placing lead blocks and other items.

[0055] The industrial control all-in-one computer (3) is fixed on the lead block cover (2).

[0056] In this example, the signals collected by each sensor are uploaded to the industrial control computer (3) via the circuit board. The industrial control computer (3) is responsible for the signal processing and calculation of each sensor.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] The industrial control all-in-one computer (3) also has the function of displaying measurement results: 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] The industrial control integrated computer (3) can control the inflation, pressure maintenance, and deflating of the airbag (4d).

[0069] 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).

[0070] Application Examples 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] Select the desired lead weight as shown on the interface of the industrial control all-in-one machine (3).

[0078] 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.

[0079] Press the "Start" button to re-measure the wheel imbalance and unevenness to confirm that the wheel is balanced to a qualified state.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] Reinstall the wheels onto the balancing machine, press the "Start" button, and repeat the wheel imbalance and unevenness measurement to confirm the repair results.

[0085] 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.

[0086] Once again, perform imbalance and unevenness measurements on the wheel assembly to confirm the repair results.

[0087] 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 with load measurement and diagnostic functions for radial unevenness of wheel assemblies, comprising: A load device (4), a main shaft (5), at least one distance sensor assembly (6), a main shaft support (7), and at least one rotation sensor assembly (8), characterized in that the main shaft (5) is disposed on the main shaft support (7), the at least one distance sensor assembly (6) is disposed on the main shaft support (7), the at least one distance sensor assembly (6) is disposed near the side of the main shaft (5) where the wheel assembly is mounted, and at least one function of the distance sensor assembly (6) is for measuring the radial non-uniformity of the steel rim in the rotating wheel assembly.

2. A balancing machine with load measurement and diagnostic functions for radial unevenness of wheel assemblies according to claim 1, characterized in that, The distance sensor assembly (6) includes a distance sensor (6b) and a driving device. 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. The fan-shaped area formed by the swing is approximately parallel to the longitudinal axis of the main shaft (5). The specified angle range is 0°-160°.

3. A balancing machine with load measurement and diagnostic functions for radial unevenness of wheel assemblies according to claim 1, 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).

4. A balancing machine with load measurement and diagnostic functions for radial unevenness of wheel assemblies according to claim 3, 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 assembly (6) is disposed on the right support (7b).

5. A balancing machine with load measurement and diagnostic functions for radial unevenness of wheel assemblies according to claim 1, characterized in that, The load device (4) includes a motion conversion device, which includes a roller support (4b).

6. A balancing machine with load measurement and diagnostic functions for radial unevenness of wheel assemblies according to claim 5, characterized in that, The balancing machine includes at least one angle sensor assembly (4f) or the load device (4) further includes at least one force sensor assembly, one end of the at least one angle sensor assembly (4f) is connected to the roller support (4b), and one end of the at least one force sensor assembly is connected to the motion conversion device.

7. A balancing machine with load measurement and diagnostic functions for radial unevenness of wheel assemblies according to claim 6, characterized in that, The load device (4) includes a pressing device that is rotatable relative to the roller support (4b).

8. A balancing machine with load measurement and diagnostic functions for radial unevenness of wheel assemblies according to claim 7, characterized in that, The load device (4) includes a drive device that can drive the pressing device to press against the tire surface of the wheel assembly with a certain load; the certain load is 10 kg to 1000 kg.

9. A balancing machine with load measurement and diagnostic functions for radial unevenness of wheel assemblies according to claim 6, characterized in that, The balancing machine includes a housing (1), a main shaft support (7) disposed on the housing (1), one end of at least one force sensor assembly disposed on the housing, and / or, one end of at least one angle sensor assembly (4f) disposed on the housing.

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

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