A taper detection device and detection method in a tire manufacturing process

Abstract

The present application belongs to the technical field of tire detection, and particularly relates to a taper detection device and detection method in the tire manufacturing process. The device comprises a base, the top of which is rotationally connected with the center of a first hub, a second hub is located directly above the first hub, the top of the second hub is rotationally connected with the center of the bottom of a connecting column, the middle of the connecting column is fixedly connected with a mounting seat, the top of the connecting column is fixedly connected with the end of a hydraulic piston rod, the mounting seat is fixedly connected with a lowering assembly, the lowering assembly comprises a lowering cylinder, and the extending end of the piston rod of the lowering cylinder is fixedly connected with a measuring assembly. The present application can shorten the time-consuming of single sensor maintenance, reduce the equipment failure rate and equipment cost, realize flexible adjustment of the measuring point in multiple degrees of freedom, improve the production line change efficiency, and reduce the cost of taper detection in the tire manufacturing process.

Description

Technical Field

[0001] This invention belongs to the field of tire testing technology, specifically relating to a tapered detection device and method in the tire manufacturing process. Background Technology

[0002] Tire uniformity is one of the core indicators for evaluating tire quality, directly affecting vehicle ride smoothness, handling stability, and passenger comfort. Among the many uniformity parameters of tires, the taper effect refers to the mechanical properties resulting from a tire's structural resemblance to a "cone" rather than an ideal "cylinder." When a tire rolls freely under a vertical load, a residual lateral force of constant magnitude and direction is generated. This lateral force causes the vehicle to continuously veer to one side during straight-line travel. The taper effect is mainly related to the uneven distribution of materials during the tire manufacturing process. Accurate detection of the taper effect during tire manufacturing is a crucial step in achieving quality control and preventing substandard products from entering the market.

[0003] Currently, the industry standard for detecting the taper effect is performed on a dedicated tire uniformity testing machine. The basic principle of this equipment is as follows: the tire to be tested is mounted on a high-precision rim and inflated to a specified pressure. A radial load simulating the vehicle's weight is applied to the tire via a rotating drum, driving the tire to rotate at a constant speed. The main shaft of the equipment integrates multi-axis force sensors, which can collect real-time data on force fluctuations in multiple directions, such as radial and lateral forces, during tire rotation. To separate the taper force (a unidirectional, constant lateral force) from the angular effect force (a lateral force whose direction reverses with the direction of rotation), the uniformity testing machine typically employs a "forward rotation + reverse rotation" measurement strategy. This decouples the lateral force data collected in the two rotations, ultimately yielding a quantified value for the taper force.

[0004] However, existing uniformity testing machines still suffer from the following technical shortcomings in practical applications: First, the high integration of sensors makes maintenance difficult and costly. Force sensors in traditional equipment are typically embedded within the spindle, forming an integrated structure. The spindle must withstand high-speed rotation and high loads, and the sensors operate in a harsh mechanical environment, resulting in a relatively high failure rate. If a sensor experiences zero drift, decreased sensitivity, or complete failure, the machine must be shut down and the spindle disassembled entirely by professional technicians. This process is not only time-consuming but also requires strict precision in disassembly and assembly. After maintenance, the entire system needs to be recalibrated, leading to long maintenance times, high maintenance costs, and high equipment operating costs. Second, fixed measurement points hinder adaptability to different tire specifications. The lateral force measurement points in existing equipment are typically fixed at specific positions on the spindle, making flexible adjustments based on the tire's actual diameter, cross-sectional width, or sidewall shape impossible. When testing tires with a wide range of specifications, fixed measurement contacts may not accurately contact critical areas of the tire sidewall, failing to meet the rapid changeover requirements of flexible production lines. Third, the equipment has a complex structure and requires stringent processing and assembly precision. It relies on dedicated sensor modules from specific suppliers, which directly leads to high equipment manufacturing costs and high taper detection costs during tire manufacturing. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a taper detection device for the tire manufacturing process. Through the coordinated operation of the connecting column, mounting base, measuring component, lowering component, first wheel hub, and second wheel hub, this invention can shorten the time required for single sensor maintenance, reduce equipment failure rate and cost, achieve flexible adjustment of the measuring points with multiple degrees of freedom, improve the changeover efficiency of flexible production lines, and reduce the cost of taper detection during tire manufacturing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A tapered detection device for tire manufacturing includes a base, the top of which is rotatably connected to the center of a first wheel hub. A second wheel hub is located directly above the first wheel hub, and the top of the second wheel hub is rotatably connected to the center of the bottom of a connecting column. A mounting seat is fixedly connected to the middle of the connecting column, and the top of the connecting column is fixedly connected to the end of a hydraulic piston rod. A lowering assembly is fixedly connected to the mounting seat. The lowering assembly includes a lowering cylinder, and a measuring component is fixedly connected to the extended end of the piston rod of the lowering cylinder. The measuring component includes a beam, with a sliding plate and a baffle fixedly connected to its two ends respectively. A slide rail is fixedly connected between the sliding plate and the baffle, and a sliding member is slidably connected to the slide rail. The sliding member includes a slider, with a sleeve plate and a protruding plate fixedly connected to one side of the slider. The sleeve plate is fitted onto the slide rail and slides on the slide rail. The protruding plate is fixedly connected to one end of a telescopic spring. A pressure sensor is fixedly connected to the side of the baffle facing the sliding member, and the other end of the telescopic spring is abutted against the pressure sensor. A rotating rod is rotatably connected in the slider, and the axial displacement of the rotating rod in the slider is restricted and fixed.

[0007] Furthermore, the lowering assembly has two lowering cylinders, and the piston rod extension end of each lowering cylinder is fixedly connected to a corresponding measuring component. The two measuring components are symmetrically arranged around the center of the connecting column. Each measuring component has two parallel slide rails, and each slide rail is slidably connected to a corresponding sliding member. The four rotating rods are arranged around the second hub.

[0008] Furthermore, grooves are provided on both sides of the mounting base, and the two sliding plates are slidably connected to the corresponding grooves on the sides facing away from the beam.

[0009] Furthermore, the lowering assembly includes a fixing rod and a fixing plate. Two fixing rods are fixedly connected to the top surface of the mounting base. One fixing plate is fixedly connected to one end of the two fixing rods at both ends, and another fixing plate is fixedly connected to the other end of the two fixing rods at both ends. Each lowering cylinder is fixedly connected to a corresponding fixing plate, and the connecting column is located between the two fixing rods.

[0010] Furthermore, one end of the rotating rod is provided with a protrusion, and the plane where the protrusion is located is below the top surface of the second wheel hub.

[0011] Furthermore, the piston rod of the lowering cylinder extends downwards, and the lowering assembly is located entirely below the measuring assembly.

[0012] Furthermore, the hydraulic piston rod drives the connecting column and the second hub to move vertically along the central axis.

[0013] Furthermore, the second wheel hub is configured to clamp the tire to be tested between the first wheel hub and the second wheel hub when the second wheel hub moves vertically downwards.

[0014] Furthermore, the connecting post is configured such that a rotating motor is provided in the inner cavity at the bottom of the connecting post and is rotatably connected to the second wheel hub. When the rotating motor is started, it drives the first wheel hub, the first wheel hub and the tire under test to rotate together.

[0015] This invention also claims a detection method using the tapered detection device in the above-described tire manufacturing process, comprising the following steps: S101: The tire to be tested is installed on the first hub, the hydraulic piston rod extends and moves downward, driving the second hub to move downward, clamping the tire to be tested between the first hub and the second hub; S102: After inflating the tire to be tested to the preset standard pressure, press the drum against the tire surface to apply load, start the rotating motor at the bottom of the connecting column, drive the tire to be tested to idle and preheat, and then stop rotating. S103: Start the lowering cylinder, the piston rod of the lowering cylinder extends, pushing the measuring component to move downward along the axis of the connecting column, while the four rotating rods move down close to the outer edge of the tire to be tested; S104: The protrusion at the bottom of the rotating rod first touches the outer edge of the tire to be tested. The rotating rod is pushed and drives the sliding part to slide towards the baffle until the outer arc surface of each rotating rod abuts against the outer arc surface of the tire to be tested. The telescopic spring of the sliding part is compressed and contracts. The four pressure sensors measure the initial pressure C1, C2, C3, and C4 at this time. S105: The rotating motor at the bottom of the connecting column rotates forward, driving the first wheel hub, the first wheel hub, and the tire under test to rotate together. The rotating rod is driven to rotate by the tire under test and is pushed by the lateral force of the tire under test. The four pressure sensors measure the real-time forward rotation lateral pressure. , , ; S106: The rotating motor at the bottom of the connecting column reverses, causing the first wheel hub, the first wheel hub, and the tire under test to rotate together. The rotating rod is driven to rotate by the tire under test and is pushed by the lateral force of the tire under test. The four pressure sensors measure the real-time lateral pressure. , , ; S107: Horizontal force deviation under counting load during forward rotation LFD_cw = (( + + )-(C1+C2+C3+C4)) / 4-(load×coefficient), under counted load, the reverse lateral force deviation LFD_ccw=(( + + ) - (C1+C2+C3+C4)) / 4 - (load × coefficient); S108: Calculate the taper force, taper force = (LFD_cw + LFD_ccw) / 2, compare the calculated taper force value with the preset standard, and it is qualified if it is less than the preset standard.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (i) The pressure sensor of this invention is not integrated inside the spindle, but is fixedly mounted on the baffle of the measuring component, making it a completely external and independent component. This layout facilitates easy disassembly and assembly, significantly reducing downtime for maintenance. When the sensor experiences zero drift, decreased sensitivity, or complete failure, there is no need to disassemble the entire spindle system as with traditional equipment. Operators only need to remove the fixing screws of the pressure sensor on the baffle to replace and recalibrate the pressure sensor within minutes. This greatly reduces the time required for single sensor maintenance, significantly mitigating the impact of equipment failure on the continuous operation of the production line. Because once a traditional spindle-integrated sensor is damaged, it often requires replacing the entire spindle assembly or commissioning the original manufacturer for precision repair, costing tens or even hundreds of thousands of yuan. The external pressure sensor of this invention is a standard industrial component, and the spindle (i.e., the connecting column) only needs to perform the basic functions of clamping the tire to be measured and transmitting rotational power, greatly reducing the failure rate and lowering the operating cost of the equipment.

[0017] (II) This invention achieves flexible adjustment of the measurement point with multiple degrees of freedom through a combination of sliding mechanisms such as a lowering cylinder, slide rail, and slider, as well as guiding structures such as a chute. In the vertical direction, the lowering cylinder drives the entire measuring assembly to rise and fall vertically. In the radial direction, the sliding component is slidably connected to the slide rail via a sleeve plate, allowing the rotating rod to move horizontally along the tire's radial direction. For tires of different diameters, the radial extension distance of the four rotating rods can be flexibly adjusted to ensure that the outer arc surface of each rotating rod can form a stable contact with the outer edge of the tire sidewall. Moreover, the two measuring components are symmetrically arranged around the center of the connecting column, enabling the device to adapt to tires with different cross-sectional shapes, such as asymmetrical tread patterns, without requiring any mechanical adjustments for production changeover. Ultimately, this invention can cover the testing needs of most commonly used tire specifications in tire factories, eliminating the need for dedicated probes or tooling changes for each specification, greatly improving the production changeover efficiency of flexible production lines.

[0018] (III) Compared with traditional uniformity testing machines, the mechanical structure of this invention has the advantages of simplified structure and low manufacturing cost. This invention does not require a high-precision embedded multi-axis force sensor. Instead, it uses an ordinary pressure sensor independently placed on the baffle, and indirectly obtains the taper force through forward and reverse differential calculation, bypassing the dependence on high-cost multi-axis force sensors. Since the measurement function is transferred from the spindle to the external measurement component, the spindle only needs to perform the basic functions of clamping the tire to be tested and transmitting rotational power. There is no need to reserve complex sensor installation cavities and signal line channels inside it, which greatly reduces the difficulty of machining and the accuracy requirements of the spindle. The core components such as pressure sensor, telescopic spring, slide rail, and lowering cylinder are all mature industrial standard parts, widely available and transparently priced. The whole machine does not need to rely on special sensor modules from specific suppliers, which helps to control procurement costs and greatly reduces the cost of taper detection in the tire manufacturing process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall assembly structure of a taper detection device in the tire manufacturing process according to the present invention. Figure 2 This is a schematic diagram of the overall structure of a taper detection device in the tire manufacturing process according to the present invention. Figure 3 This is a partial structural diagram of a taper detection device in the tire manufacturing process according to the present invention. Figure 1 ; Figure 4 This is a partial structural diagram of a taper detection device in the tire manufacturing process according to the present invention. Figure 2 ; Figure 5 This is a partial structural diagram of a taper detection device in the tire manufacturing process according to the present invention. Figure 3 ; Figure 6 This is a partial structural diagram of a taper detection device in the tire manufacturing process according to the present invention. Figure 4 ; Figure 7 This is a schematic diagram of the detection method of a tapered detection device in the tire manufacturing process of the present invention.

[0020] The attached figures are labeled as follows: 100. Base; 200. First wheel hub; 300, Second wheel hub; 400. Connecting column; 500, Mounting base; 501, Slide groove; 600. Hydraulic piston rod; 700. Measuring component; 701. Beam; 702. Slide rail; 703. Sliding element; 7031. Slider; 7032. Sleeve plate; 7033. Protruding plate; 7034. Telescopic spring; 7035. Pressure sensor; 7041. Protruding head; 704. Rotating rod; 705. Slide plate; 706. Baffle; 800. Lowering assembly; 801. Fixing rod; 802. Fixing plate; 803. Lowering cylinder; 900. Tire to be tested. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0023] Example

[0024] like Figures 1-7As shown, a tapered detection device in the tire manufacturing process includes a base 100. The top of the base 100 is rotatably connected to the center of a first hub 200. A second hub 300 is located directly above the first hub 200, and the top of the second hub 300 is rotatably connected to the center of the bottom of a connecting column 400. A mounting seat 500 is fixedly connected to the middle of the connecting column 400, and the top of the connecting column 400 is fixedly connected to the end of a hydraulic piston rod 600. A lowering assembly 800 is fixedly connected to the mounting seat 500. The lowering assembly 800 includes a lowering cylinder 803, and a measuring assembly 700 is fixedly connected to the extended end of the piston rod of the lowering cylinder 803. The measuring assembly 700 includes a beam 701, with a sliding plate 705 and a baffle 706 fixedly connected to both ends of the beam 701, respectively. A slide rail 702 is fixedly connected between the sliding plate 705 and the baffle 706, and a sliding member 703 is slidably connected to the slide rail 702. The sliding member 703 includes a slider 7031. A sleeve plate 7032 and a convex plate 7033 are fixedly connected to one side of the slider 7031. The sleeve plate 7032 is sleeved on the slide rail 702 and slides on the slide rail 702. The convex plate 7033 is fixedly connected to one end of the telescopic spring 7034. A pressure sensor 7035 is fixedly connected to the side of the baffle 706 facing the slider 703. The other end of the telescopic spring 7034 is abutted against the pressure sensor 7035. A rotating rod 704 is rotatably connected in the slider 7031. The axial displacement of the rotating rod 704 in the slider 7031 is restricted and fixed.

[0025] In this invention, the lower bead of the tire 900 to be tested is placed on the first hub 200. The hydraulic piston rod 600 is activated, extending and moving downwards, causing the second hub 300 to press down until the upper bead of the tire 900 is clamped between the first hub 200 and the second hub 300. Next, the tire 900 is inflated to a standard pressure through the inflation port, for example, 200 kPa for passenger car tires. The drum is pressed against the surface of the tire 900, applying a specified radial load. A rotating motor (not shown) at the bottom of the connecting column 400, connected to and driving the second hub 300, is activated, causing the tire 900 to idle and preheat, stabilizing the tire temperature and internal stress distribution, before rotation stops. Then, the two lowering cylinders 803 of the lowering assembly 800 are activated. The piston rods of the lowering cylinders 803 extend downwards, pushing the entire measuring assembly 700 vertically downwards along the slide 501. As the measuring assembly 700 descends, the protrusions 7041 at the bottom of the four rotating rods 704 first contact the outer edge of the sidewall of the tire under test 900. Continuing to descend, the sidewall of the tire under test 900 pushes the rotating rods 704 and the entire sliding component 703 horizontally along the slide rail 702 towards the baffle 706 via the protrusions 7041. During this sliding process, the telescopic spring 7034 is further compressed, and its pressure is transmitted to the pressure sensor 7035. When the lowering cylinder 803 stops moving, the outer arc surface of each rotating rod 704 abuts against the outer arc surface of the tire under test 900. At this time, the four pressure sensors 7035 respectively measure an initial pressure value, denoted as C1, C2, C3, and C4. Then, the rotating motor is started to rotate forward, causing the entire tire under test 900 to rotate. Because the rotating rods 704 maintain contact with the tire sidewall and there is a certain friction between them, the rotating rods 704 are rotated along with the tire. Simultaneously, if the tire exhibits a conical effect, it will generate a constant lateral force. This lateral force will push the rotating rod 704, which in turn will change the compression of the telescopic spring 7034 via the sliding member 703. Four pressure sensors 7035 detect the lateral pressure during forward rotation in real time, respectively... , , Then, stop the motor and wait until the tires come to a complete stop before restarting the motor to rotate in the opposite direction. Similarly, the four pressure sensors 7035 measure the lateral pressure during the reverse rotation. , , The system then calculates the pressure change relative to the initial pressure in both forward and reverse rotation states, and obtains the forward lateral force deviation LFD_cw and the reverse lateral force deviation LFD_ccw, respectively. LFD_cw=(( + + ) - (C1 + C2 + C3 + C4) / 4 - (load × coefficient) LFD_ccw=(( + + ) - (C1 + C2 + C3 + C4) / 4 - (load × coefficient) LFD (Lateral Force Deviation) refers to the lateral force deviation under load. "(Load × Coefficient)" is a crucial correction term in the LFD formula, used to eliminate residual mechanical errors on the spindle (i.e., connecting post 400). "Load" refers to the change in load applied to the tire. It can be understood as the difference between the force applied during measurement and a reference value (such as no-load or calibration value). Its range is typically set within a test load range of 400 to 800 kgf (kilogram-force). The "coefficient" is a constant determined through the equipment calibration process. Since mechanical spindles and sensors cannot be 100% perfect, the system may produce small but measurable errors under different loads. This coefficient is used to quantify these errors, ensuring that the calculation results accurately reflect the tire itself, rather than the equipment characteristics. By subtracting (Load × Coefficient), the system can compensate for minor spindle deformation or sensor response deviations caused by load changes, thereby significantly improving the accuracy and repeatability of taper force measurement.

[0026] Finally, based on the difference in steering force deviation between the forward and reverse directions, the conical force of the tire under test 900 is calculated: Conical force = (LFD_cw + LFD_ccw) / 2. The calculated conical force value is compared with the preset qualified threshold: if it is less than the threshold, the tire conical effect is deemed qualified; otherwise, it is deemed unqualified and can be marked and removed by the subsequent marking device.

[0027] It is worth noting that, according to the requirements of the national metrological technical specification JJF 1839-2020, when a qualified uniformity testing machine repeatedly measures the same tire (without removing the tire for repeatability), the standard deviation of the cone effect force should be ≤3N (passenger car / light truck tire). Furthermore, the lowering assembly 800 has two lowering cylinders 803, and the piston rod extension end of each lowering cylinder 803 is fixedly connected to a corresponding measuring assembly 700. The two measuring assemblies 700 are arranged symmetrically around the center of the connecting column 400. Each measuring assembly 700 has two parallel slide rails 702, and each slide rail 702 is slidably connected to a corresponding sliding member 703. The four rotating rods 704 are arranged around the second hub 300.

[0028] In this invention, the pressure sensor 7035 is not integrated inside the spindle, but is fixedly mounted on the baffle 706 of the measuring assembly 700, making it a completely external and independent component. This arrangement facilitates easy disassembly and assembly, significantly reducing downtime. When the sensor experiences zero drift, decreased sensitivity, or complete failure, there is no need to disassemble the entire spindle system as with traditional equipment. Operators only need to remove the fixing screws of the pressure sensor 7035 on the baffle 706 to replace and recalibrate the pressure sensor 7035 within minutes. Compared to the downtime of several hours or even half a day for maintenance of traditional equipment, this invention can greatly reduce the time required for single sensor maintenance, significantly reducing the impact of equipment failure on the continuous operation of the production line; moreover, the replacement cost is significantly reduced, because once a traditional spindle-integrated sensor is damaged, it often requires replacing the entire spindle assembly or entrusting the original manufacturer for precision repair, with costs often reaching tens or even hundreds of thousands of yuan. The external pressure sensor of this invention is a standard industrial component with low procurement costs, and the replacement process does not require special tools or high-precision alignment adjustments, further reducing the overall life-cycle cost of the equipment.

[0029] Furthermore, each of the two sides of the mounting base 500 has a sliding groove 501, and the two sliding plates 705 are slidably connected to the corresponding sliding groove 501 on the side facing away from the beam 701.

[0030] In this invention, the combined design of sliding mechanisms such as the lowering cylinder 803, slide rail 702, and slider 7031, as well as guiding structures such as the slide groove 501, enables flexible adjustment of the measurement points with multiple degrees of freedom. In the vertical direction, the lowering cylinder 803 drives the entire measuring assembly 700 to rise and fall vertically, allowing the rotating rod 704 to precisely stop at a predetermined measurement contact position according to the different tire sidewall heights. In the radial direction, the slider 703 is slidably connected to the slide rail 702 via a sleeve 7032, allowing the rotating rod 704 to move horizontally along the tire's radial direction. For tires of different diameters, the radial extension distance of the four rotating rods can be flexibly adjusted to ensure that the outer arc surface of each rotating rod can form a stable contact with the outer edge of the tire sidewall. The two measuring assemblies 700 are symmetrically arranged around the connecting column 400, each assembly containing two sliders 703, resulting in a total of four measurement points evenly distributed around the second hub 300. This symmetrical layout not only ensures a uniform distribution of measuring force in the circumferential direction, avoiding uneven load distribution caused by unilateral force, but also allows the device to adapt to tires with different cross-sectional shapes, such as tires with asymmetrical tread patterns, enabling changeovers without any mechanical adjustments. Ultimately, this invention can cover the testing needs of most commonly used tire specifications in tire factories, eliminating the need for dedicated probes or tooling changes for each specification, thus greatly improving the changeover efficiency of flexible production lines.

[0031] Furthermore, the lowering assembly 800 includes a fixing rod 801 and a fixing plate 802. The two fixing rods 801 are fixedly connected to the top surface of the mounting base 500. One fixing plate 802 is fixedly connected to one end of the two fixing rods 801 at both ends, and the other fixing plate 802 is fixedly connected to the other end of the two fixing rods 801 at both ends. Each lowering cylinder 803 is fixedly connected to a corresponding fixing plate 802, and the connecting column 400 is located between the two fixing rods 801.

[0032] Furthermore, one end of the rotating rod 704 is provided with a protrusion 7041, and the plane where the protrusion 7041 is located is below the top surface of the second hub 300.

[0033] Furthermore, the piston rod of the lowering cylinder 803 extends downwards, and the lowering assembly 800 is located entirely below the measuring assembly 700.

[0034] Furthermore, the hydraulic piston rod 600 drives the connecting column 400 and the second hub 300 to move vertically along the central axis.

[0035] Furthermore, the second wheel hub 300 is configured such that when the second wheel hub 300 moves vertically downwards, the tire 900 to be tested is clamped between the first wheel hub 200 and the second wheel hub 300.

[0036] Furthermore, the connecting post 400 is configured such that a rotating motor is provided in the inner cavity at the bottom of the connecting post 400 and is rotatably connected to the second wheel hub 300. When the rotating motor is started, it drives the first wheel hub 200, the first wheel hub 200 and the tire under test 900 to rotate together.

[0037] In this invention, a high-precision embedded multi-axis force sensor is unnecessary. Traditional equipment typically requires a complex sensor array integrated within the spindle to simultaneously measure multiple components such as radial force, lateral force, and self-aligning torque, placing extremely high demands on materials, processing technology, and assembly precision. This invention uses a standard pressure sensor 7035 independently mounted externally on the baffle 706, indirectly obtaining the taper force through forward and reverse differential calculation, bypassing the reliance on high-cost multi-axis force sensors. Since the measurement function is transferred from the spindle to the external measurement component 700, the spindle (i.e., the connecting column 400) only needs to perform the basic functions of clamping the tire 900 to be measured and transmitting rotational power; its internal components do not require complex sensor mounting cavities or signal line channels. This significantly reduces the machining difficulty and precision requirements of the spindle, allowing the direct selection of a standard precision spindle or its manufacture by a general machining plant. The core components such as pressure sensor 7035, telescopic spring 7034, slide rail 702, and lowering cylinder 803 are all mature industrial standard parts, widely available and with transparent prices. The whole machine does not need to rely on dedicated sensor modules from specific suppliers, which helps to control procurement costs and greatly reduces testing costs.

[0038] This invention also claims a detection method using the tapered detection device in the above-described tire manufacturing process, comprising the following steps: S101: The tire to be tested 900 is installed on the first hub 200, the hydraulic piston rod 600 extends and moves downward, driving the second hub 300 to move downward, clamping the tire to be tested 900 between the first hub 200 and the second hub 300. S102: After inflating the tire 900 to be tested to the preset standard pressure, press the drum against the tire surface to apply load, start the rotating motor at the bottom of the connecting column 400, drive the tire 900 to run idle and preheat, and then stop rotating. S103: Start the lowering cylinder 803. The piston rod of the lowering cylinder 803 extends and pushes the measuring component 700 to move downward along the axis of the connecting column 400. At the same time, the four rotating rods 704 move down and approach the outer edge of the tire to be tested 900. S104: The protrusion 7041 at the bottom of the rotating rod 704 first touches the outer edge of the tire 900 to be tested. The rotating rod 704 is pushed and drives the sliding member 703 to slide towards the baffle 706 until the outer arc surface of each rotating rod 704 abuts against the outer arc surface of the tire 900 to be tested. The telescopic spring 7034 of the sliding member 703 is compressed and contracts. The four pressure sensors 7035 measure the initial pressure C1, C2, C3, and C4 at this time. S105: The rotating motor at the bottom of the connecting column 400 rotates forward, driving the first wheel hub 200, the first wheel hub 200, and the tire under test 900 to rotate together. The rotating rod 704 is driven to rotate by the tire under test 900 and is pushed by the lateral force of the tire under test 900. The four pressure sensors 7035 measure the real-time forward rotation lateral pressure. , , ; S106: The rotating motor at the bottom of the connecting column 400 reverses, causing the first wheel hub 200, the first wheel hub 200, and the tire under test 900 to rotate together. The rotating rod 704 is rotated by the tire under test 900 and is pushed by the lateral force of the reverse rotation of the tire under test 900. The four pressure sensors 7035 measure the real-time lateral pressure. , , ; S107: Horizontal force deviation under counting load during forward rotation LFD_cw = (( + + )-(C1+C2+C3+C4)) / 4-(load×coefficient), under counted load, the reverse lateral force deviation LFD_ccw=(( + + ) - (C1+C2+C3+C4)) / 4 - (load × coefficient); S108: Calculate the taper force, taper force = (LFD_cw + LFD_ccw) / 2, compare the calculated taper force value with the preset standard, and it is qualified if it is less than the preset standard.

[0039] It's worth noting that the conical force is generated by the tire's cone-like shape and has a fixed direction. For example, if a tire is naturally biased to the left, this "leftward" force will not change whether it rotates clockwise or counterclockwise. It's like pushing a cone to roll; it will always veer towards the side the tip is pointing. The angular effect force is generated by the asymmetry of the tire's internal cord angles, and its direction reverses with the direction of rotation. This can be understood as similar to a rotating propeller; when the direction of rotation changes, the direction of the lateral force also reverses. A single measurement cannot distinguish between these two distinctly different lateral forces—the conical effect and the angular effect—so two measurements, one in each direction of rotation, are needed to separate them through mathematical calculations. The total lateral force measured when the equipment is rotating forward = taper force + angle effect force; the total lateral force measured when rotating in reverse = taper force - angle effect force. Adding these two sets of data and dividing by 2 will eliminate the angle effect and give the pure taper force: taper force = (total force in forward direction + total force in reverse direction) / 2, that is, taper force = (LFD_cw + LFD_ccw) / 2.

[0040] It is worth noting that the pressure data collected by the sensors are all converted into electrical signals, amplified, and then input into a dedicated industrial control computer and data processing unit for calculation and processing. This is existing technology and will not be elaborated further.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A tapered detection device for tire manufacturing and forming process, characterized in that, The system includes a base (100), the top of which is rotatably connected to the center of a first hub (200), a second hub (300) located directly above the first hub (200), the top of which is rotatably connected to the center of the bottom of a connecting column (400), a mounting seat (500) fixedly connected to the middle of the connecting column (400), the top of the connecting column (400) fixedly connected to the end of a hydraulic piston rod (600), and a lowering assembly (800) fixedly connected to the mounting seat (500). The lowering assembly (800) includes a lowering cylinder (803), and a measuring assembly (700) is fixedly connected to the extended end of the piston rod of the lowering cylinder (803). The measuring component (700) includes a beam (701), with the two ends of the beam (701) fixedly connected to the slide plate (705) and the baffle (706), respectively. A slide rail (702) is fixedly connected between the slide plate (705) and the baffle (706), and a sliding member (703) is slidably connected to the slide rail (702). The sliding member (703) includes a slider (7031). A sleeve plate (7032) and a convex plate (7033) are fixedly connected to one side of the slider (7031). The sleeve plate (7032) is sleeved on the slide rail (702) and slides on the slide rail (702). The convex plate (7033) is fixedly connected to one end of a telescopic spring (7034). A pressure sensor (7035) is fixedly connected to the side of the baffle (706) facing the slider (703). The other end of the telescopic spring (7034) is abutted against the pressure sensor (7035). A rotating rod (704) is rotatably connected in the slider (7031). The axial displacement of the rotating rod (704) in the slider (7031) is restricted and fixed.

2. The taper detection device in the tire manufacturing process according to claim 1, characterized in that, The lowering assembly (800) has two lowering cylinders (803), and the piston rod of each lowering cylinder (803) is fixedly connected to a corresponding measuring assembly (700). The two measuring assemblies (700) are arranged symmetrically around the center of the connecting column (400). Each measuring assembly (700) has two parallel slide rails (702), and each slide rail (702) is slidably connected to a corresponding sliding member (703). The four rotating rods (704) are arranged around the second hub (300).

3. The taper detection device in the tire manufacturing process according to claim 2, characterized in that, The mounting base (500) has grooves (501) on both sides, and the two sliding plates (705) are slidably connected to the corresponding grooves (501) on the side facing away from the beam (701).

4. The taper detection device in the tire manufacturing process according to claim 2, characterized in that, The lowering assembly (800) includes a fixing rod (801) and a fixing plate (802). Two fixing rods (801) are fixedly connected to the top surface of the mounting base (500). One fixing plate (802) is fixedly connected to one end of the two fixing rods (801) at both ends, and the other fixing plate (802) is fixedly connected to the other end of the two fixing rods (801) at both ends. Each lowering cylinder (803) is fixedly connected to a corresponding fixing plate (802). The connecting column (400) is located between the two fixing rods (801).

5. The taper detection device in the tire manufacturing process according to claim 1, characterized in that, One end of the rotating rod (704) is provided with a protrusion (7041), and the plane where the protrusion (7041) is located is below the top surface of the second hub (300).

6. The taper detection device in the tire manufacturing process according to claim 1, characterized in that, The piston rod of the lowering cylinder (803) extends downwards, and the lowering assembly (800) is located entirely below the measuring assembly (700).

7. The taper detection device in the tire manufacturing process according to claim 1, characterized in that, The hydraulic piston rod (600) drives the connecting column (400) and the second hub (300) to move vertically along the central axis.

8. The taper detection device in the tire manufacturing process according to claim 2, characterized in that, The second hub (300) is configured to clamp the tire (900) to be tested between the first hub (200) and the second hub (300) when the second hub (300) moves vertically downward.

9. The taper detection device in the tire manufacturing process according to claim 8, characterized in that, The connecting post (400) is configured such that the bottom cavity of the connecting post (400) is provided with a rotating motor that is rotatably connected to the second wheel hub (300). When the rotating motor is started, it drives the first wheel hub (200), the first wheel hub (200) and the tire to be tested (900) to rotate together.

10. A detection method using the taper detection device in the tire manufacturing process according to any one of claims 1 to 9, characterized in that, Includes the following steps: S101: The tire to be tested (900) is installed on the first hub (200), the hydraulic piston rod (600) extends and moves downward, driving the second hub (300) to move downward, and clamping the tire to be tested (900) between the first hub (200) and the second hub (300); S102: After inflating the tire (900) to the preset standard pressure, press the drum against the tire surface to apply load, start the rotating motor at the bottom of the connecting column (400), drive the tire (900) to run idle and preheat, and then stop rotating. S103: Start the lowering cylinder (803), the piston rod of the lowering cylinder (803) extends, pushing the measuring component (700) to move downward along the axis of the connecting column (400), while the four rotating rods (704) move down close to the outer edge of the tire to be tested (900); S104: The protrusion (7041) at the bottom of the rotating rod (704) first touches the outer edge of the tire (900) to be tested. The rotating rod (704) is pushed and drives the sliding member (703) to slide towards the baffle (706) until the outer arc surface of each rotating rod (704) abuts against the outer arc surface of the tire (900) to be tested. The telescopic spring (7034) of the sliding member (703) is compressed and contracted. The four pressure sensors (7035) measure the initial pressure C1, C2, C3, C4 at this time. S105: The rotating motor at the bottom of the connecting column (400) rotates forward, driving the first hub (200), the first hub (200) and the tire under test (900) to rotate together. The rotating rod (704) is driven to rotate by the tire under test (900) and is pushed by the lateral force of the tire under test (900). The four pressure sensors (7035) measure the real-time forward rotation lateral pressure. , , ; S106: The rotating motor at the bottom of the connecting column (400) reverses, causing the first wheel hub (200), the first wheel hub (200) and the tire under test (900) to rotate together. The rotating rod (704) is rotated by the tire under test (900) and is pushed by the lateral force of the reverse rotation of the tire under test (900). The four pressure sensors (7035) measure the real-time lateral pressure. , , ; S107: Horizontal force deviation under counting load during forward rotation LFD_cw = (( + + )-(C1+C2+C3+C4)) / 4-(load×coefficient), under counted load, the reverse lateral force deviation LFD_ccw=(( + + ) - (C1+C2+C3+C4)) / 4 - (load × coefficient); S108: Calculate the taper force, taper force = (LFD_cw + LFD_ccw) / 2, compare the calculated taper force value with the preset standard, and it is qualified if it is less than the preset standard.

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