Wheel hub orthosis press and control method thereof

Abstract

The present application relates to the technical field of hub correction, and particularly relates to a hub straightening press and a control method thereof, which comprises a support frame, a hub positioning assembly and a rim straightening assembly, the hub positioning assembly comprises a jacking structure and a downward pressing correction structure, the jacking structure is used for lifting the hub, and cooperates with the downward pressing correction structure to correct and fix the center hub of the hub; the rim straightening assembly comprises a bottom support plate, a profiling die, a bottom moving part, a top pressing plate and a top moving part, the profiling die is arranged on the bottom support plate, the bottom moving part is used for driving the bottom support plate to move upwards, so that the profiling die contacts the lower reference surface of the rim, the top pressing plate is arranged on one side of the downward pressing correction structure, and the top moving part is used for driving the top pressing plate to move downwards to exert pressure on the rim and correct the lower side of the rim. The center hub of the hub can be first straightened and fixed, and then the rim can be straightened, so that the production quality of the hub can be improved, and the defective rate can be reduced.

Description

Technical Field

[0001] This invention relates to the field of wheel hub straightening technology, and in particular to a wheel hub straightening press and its control method. Background Technology

[0002] Wheel hub straightening refers to the process of repairing and reshaping motorcycle wheels that have become out of round, misaligned, or damaged due to impacts, deformation, or other reasons. After inspecting the degree of deformation using specialized equipment, techniques such as heat treatment, mechanical pressurization, or CNC straightening are employed to restore the original geometric accuracy and structural strength, thereby ensuring the vehicle's stability, safety, and normal wear of the tire contact surface. Wheel hub straightening is suitable for aluminum alloy or steel wheels, and can effectively extend the wheel's lifespan and reduce manufacturing and replacement costs without compromising material properties.

[0003] Existing wheel hub straightening structures typically act directly on the rim, applying external force to locally correct deformed areas. However, this method has significant limitations: because the straightening force is mainly concentrated at the rim edge, without effectively supporting or simultaneously calibrating the central hub area (the part where the spokes connect to the axle), it can easily lead to tilting, eccentricity, or perpendicularity deviations in the central hub area while the rim regains its roundness. Although such perpendicularity errors may be small, they directly affect the dynamic balance of the wheel assembly, causing problems such as vehicle vibration, steering wheel wobble, and abnormal tire wear during driving. Summary of the Invention

[0004] The purpose of this invention is to provide a wheel hub straightening press and its control method, which aims to first straighten and fix the center hub of the wheel hub, and then straighten the wheel rim, thereby improving the production quality of wheel hubs and reducing the defect rate.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a wheel hub straightening press, including a support frame, a wheel hub positioning assembly, and a wheel rim straightening assembly. The wheel hub positioning assembly includes a lifting structure and a pressing and correcting structure. The lifting structure is disposed below the support frame, and the pressing and correcting structure is disposed above the support frame. The lifting structure is used to lift the wheel hub and cooperate with the pressing and correcting structure to fix and correct the center hub of the wheel hub. The rim straightening assembly includes a bottom support plate, a contouring mold, a bottom moving part, a top pressure plate, and a top moving part. The bottom support plate is disposed on one side of the lifting structure, the contouring mold is disposed on the bottom support plate, and the bottom moving part is used to drive the bottom support plate to move upward so that the contouring mold contacts the lower reference surface of the rim. The top pressure plate is disposed on one side of the downward pressing and straightening structure, and the top moving part is used to drive the top pressure plate to move downward to apply pressure to the rim and straighten the lower side of the rim.

[0006] The lifting structure includes a support column, a lower mounting platform, and a lower mold hydraulic cylinder. The support column is slidably disposed below the support frame. The output end of the lower mold hydraulic cylinder is connected to the support column. The lower mounting platform is fixed on the support column and is used for pre-positioning the wheel hub.

[0007] The downward pressure correction structure includes an upper mold hydraulic cylinder and an upper abutment structure. The upper mold hydraulic cylinder is fixed above the support frame, and the upper abutment structure is connected to the output end of the upper mold hydraulic cylinder.

[0008] The rim straightening assembly further includes a floating buffer structure, which includes an adjusting rod, a limiting rod, and a buffer spring. The adjusting rod is threadedly connected to the bottom support plate. The limiting rod is slidably disposed on one side of the top pressure plate and symmetrically disposed with the adjusting rod. The buffer spring is disposed between the limiting rod and the top pressure plate.

[0009] The rim straightening assembly also includes a rotating structure, which is used to drive the rim hub to rotate by a preset angle and then straighten it again.

[0010] The rotating structure includes a rotating motor, a rotating gear, a rotating gear ring, a rotating platform, and a bearing. The rotating motor is fixed to one side of the bottom support plate. The rotating gear is connected to the output end of the rotating motor. The rotating platform is rotatably disposed between the bottom support plate and the support column. The bearing is disposed between the rotating platform and the bottom support plate. The rotating gear ring is fixedly connected to the rotating platform and meshes with the rotating gear.

[0011] The bottom moving component includes a drive motor, a transmission rod, a transmission belt, a pulley, a bevel gear set, and a rotating threaded rod. The rotating threaded rod is threadedly connected to the bottom support plate, the bevel gear set is connected to the rotating threaded rod, the pulley is used to drive the bevel gear set to rotate, the transmission rod is rotatably mounted on the support frame, the transmission belt is rotatably connected to the transmission rod and the pulley, and the drive motor is used to drive the transmission rod to rotate.

[0012] The rim straightening assembly also includes a guide rail, which is mounted on the support frame and slidably connected to the bottom support plate and the top pressure plate.

[0013] The wheel hub straightening press further includes a feeding assembly, which includes a feeding moving part, a support arm, and a clamping arm. The clamping arm is used to clamp the wheel hub to be straightened, and the support arm is used to support the clamping arm. The feeding moving part is connected to the support arm and is used to drive the support arm to move to a designated position.

[0014] Secondly, the present invention also provides a control method for a wheel hub straightening press, comprising: The wheel hub is placed on the lifting structure and raised to a preset position by the lifting structure. The downward pressure correction structure is activated to compress and correct the center hub of the wheel hub. After the center alignment is completed, the bottom support plate is moved upward to move the contour mold upward and make contact with the bottom of the rim. At the same time, the top moving part is moved downward to move the top pressure plate downward to make contact with the top of the rim, thereby straightening the rim.

[0015] The present invention discloses a hub straightening press and its control method. The support frame serves as the basic load-bearing structure of the whole machine, which is used to securely install the other functional modules and ensure the rigidity and stability of the equipment during operation.

[0016] The wheel hub positioning assembly is mainly used for precise positioning and preliminary correction of the wheel hub, and includes a lifting structure and a downward correction structure. The lifting structure is located below the support frame and is typically driven by a hydraulic cylinder, capable of smoothly lifting the wheel hub to be corrected vertically to a preset working height. The downward correction structure is correspondingly located above the support frame and can also be driven by a high-precision actuator, applying controllable downward pressure. During operation, the lifting structure and the downward correction structure work together, using an opposing clamping method to correct the verticality and perform preliminary rounding of the center hub area of ​​the wheel hub, while simultaneously achieving reliable vertical fixation of the wheel hub, providing a stable reference for subsequent rim correction.

[0017] The rim straightening assembly is used for precise straightening of locally deformed areas of the rim (especially the lower side of the rim). A bottom support plate is positioned on one side of the lifting structure, and its upper surface is fitted with a contour mold matching the target rim model. This mold is designed according to the standard rim profile and has excellent fit and support. Bottom moving components (such as linear modules, lifting hydraulic cylinders, or servo push rods) drive the bottom support plate to move precisely upwards in the vertical direction, ensuring the contour mold fits tightly against the reference surface of the lower part of the rim, forming a reliable lower support point.

[0018] Meanwhile, the top pressure plate is positioned on one side of the downward correction structure and is driven downward by a top moving component (such as a hydraulic cylinder or servo electric cylinder). Once the bottom conforming mold is in place, the top moving component moves the top pressure plate downward synchronously, applying controllable and uniform pressure to the deformed parts of the rim. Utilizing the elastic / plastic deformation characteristics of the material, defects such as dents and warps on the lower side of the rim are gradually corrected to a geometric shape that meets tolerance requirements. This allows for the first correction and fixation of the center hub before the rim itself is corrected, thereby improving rim production quality and reducing the defect rate. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural diagram of a hub straightening press according to the present invention.

[0021] Figure 2 This is a structural diagram of the right side of a hub straightening press according to the present invention.

[0022] Figure 3 This is a left-side structural diagram of a hub straightening press according to the present invention.

[0023] Figure 4 yes Figure 3 A magnified view of detail A.

[0024] Figure 5 This is a cross-sectional view of a hub straightening press according to the present invention along the support column.

[0025] Figure 6 This is a cross-sectional view of a hub straightening press according to the present invention along a rotating threaded rod.

[0026] Support frame 101, hub positioning assembly 102, rim straightening assembly 103, lifting structure 104, downward pressure correction structure 105, bottom support plate 106, contour mold 107, bottom moving part 108, top pressure plate 109, top moving part 110, support column 111, lower mounting platform 112, lower mold hydraulic cylinder 113, upper mold hydraulic cylinder 114, upper abutment structure 115, adjusting rod 116, limit rod 117, buffer spring 118, rotating motor 119, rotating gear 120, rotating gear ring 121, rotating table 122, bearing 123, drive motor 124, transmission rod 125, transmission belt 126, pulley 127, bevel gear set 128, rotating threaded rod 129, guide rail 130, loading moving part 131, support arm 132, clamping arm 133. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] First embodiment: Please refer to Figures 1-6 This invention provides a wheel hub straightening press, including a support frame 101, a wheel hub positioning assembly 102, and a wheel rim straightening assembly 103. The wheel hub positioning assembly includes a lifting structure 104 and a pressing correction structure 105. The lifting structure 104 is located below the support frame 101, and the pressing correction structure 105 is located above the support frame 101. The lifting structure 104 is used to lift the wheel hub and cooperates with the pressing correction structure 105 to correct and fix the center hub of the wheel hub. The wheel rim straightening assembly 103 includes a bottom support plate 106 and a contouring mold 103. 07. Bottom moving part 108, top pressure plate 109, and top moving part 110. The bottom support plate 106 is disposed on one side of the lifting structure 104. The contouring mold 107 is disposed on the bottom support plate 106. The bottom moving part 108 is used to drive the bottom support plate 106 to move upward, so that the contouring mold 107 contacts the lower reference surface of the rim. The top pressure plate 109 is disposed on one side of the downward pressure correction structure 105. The top moving part 110 is used to drive the top pressure plate 109 to move downward to apply pressure to the rim and correct the lower side of the rim.

[0030] In this embodiment, the support frame 101 serves as the basic load-bearing structure of the entire machine, used to securely install the remaining functional modules and ensure the rigidity and stability of the equipment during operation.

[0031] The wheel hub positioning assembly 102 is mainly used for precise positioning and preliminary correction of the wheel hub. It includes a lifting structure 104 and a downward correction structure 105. The wheel hub to be corrected is placed on the lifting structure 104 by a robotic arm. The lifting structure 104 is located below the support frame 101 and is usually driven by the lower mold hydraulic cylinder 113 actuator, which can smoothly lift the wheel hub to be corrected vertically to the preset working height. The downward correction structure 105 is located above the support frame 101 and can also be driven by a high-precision actuator to apply controllable downward pressure. During operation, the lifting structure 104 and the downward correction structure 105 work together to perform verticality correction and preliminary rounding of the center hub area of ​​the wheel hub by clamping it from above and below, while simultaneously achieving reliable fixation of the wheel hub in the vertical direction, providing a stable reference for subsequent rim correction.

[0032] The rim straightening assembly 103 is used for fine straightening of localized deformed areas of the rim (especially the lower side of the rim). A bottom support plate 106 is located on one side of the lifting structure 104, and its upper surface is fitted with a contour mold 107 matching the target rim model. This mold is designed according to the standard rim profile and has good fit and support. A bottom moving component 108 (such as a lifting hydraulic cylinder) drives the bottom support plate 106 to move precisely upwards in the vertical direction, causing the contour mold 107 to fit tightly against the reference surface of the lower part of the rim, forming a reliable lower support point.

[0033] Meanwhile, the top pressure plate 109 is positioned on one side of the downward pressure correction structure 105 and is driven downward by the top moving component 110 (such as a hydraulic cylinder, servo motor, etc.). Once the bottom contouring mold 107 is in place, the top moving component 110 drives the top pressure plate 109 to move downward synchronously, applying controllable and uniform pressure to the deformed parts of the rim. Utilizing the elastic / plastic deformation characteristics of the material, defects such as dents and warps on the lower side of the rim are gradually corrected to a geometric shape that meets tolerance requirements. This system can achieve functions such as rim model recognition, automatic positioning, multi-stage pressure control, correction effect evaluation, and abnormal alarms, significantly improving the equipment's intelligence level and operational consistency.

[0034] The wheel hub straightening press and its control method provided by this invention are not only compact and functional, but also have the advantages of high precision, high efficiency and good adaptability. They can be widely used in automobile repair, wheel hub remanufacturing and high-end wheel production.

[0035] The lifting structure 104 includes a support column 111, a lower mounting platform 112, and a lower mold hydraulic cylinder 113. The support column 111 is slidably disposed below the support frame 101. The output end of the lower mold hydraulic cylinder 113 is connected to the support column 111. The lower mounting platform 112 is fixed on the support column 111 and is used for pre-positioning the wheel hub.

[0036] The support column 111 is made of high-strength alloy steel or structural steel, possessing excellent rigidity and wear resistance. It is vertically arranged and slidably mounted below the support frame 101 via precision guide rails or linear bearings 123, ensuring smooth and undulating operation during lifting. The lower mold hydraulic cylinder 113 serves as the drive unit, typically a high-precision hydraulic cylinder or a servo-controlled electro-hydraulic cylinder. Its cylinder body is fixed to the bottom of the support frame 101 or the ground base, and its output end (piston rod) is rigidly connected to the lower end of the support column 111, providing a stable and controllable upward thrust. When the equipment starts, the lower mold hydraulic cylinder 113 actuates, pushing the support column 111 upwards vertically, thereby synchronously lifting the lower mounting platform 112 fixed to it.

[0037] The lower mounting platform 112 is securely mounted on top of the support column 111. Its upper surface may be equipped with auxiliary positioning elements such as positioning pins, V-grooves, central cone sleeves, or magnetic suction devices, which can precisely match the structural features of the bottom of the wheel hub (such as center holes, bolt holes, or spoke bottom surfaces) to achieve pre-positioning and initial support of the wheel hub. This pre-positioning not only ensures that the wheel hub remains vertical and centered during subsequent correction, but also effectively prevents correction deviations or equipment damage caused by off-center loading, providing a reliable foundation for the precise functioning of the lower correction structure 105.

[0038] The downward pressure correction structure 105 includes an upper mold hydraulic cylinder 114 and an upper support structure 115. The upper mold hydraulic cylinder 114 is fixed above the support frame 101, and the upper support structure 115 is connected to the output end of the upper mold hydraulic cylinder 114.

[0039] The upper mold hydraulic cylinder 114 can also be a high-response hydraulic cylinder, with its cylinder body securely mounted on the top crossbeam of the support frame 101 via a flange or bracket to ensure structural stability and no swaying under load. The output end of the upper mold hydraulic cylinder 114 extends downward and is rigidly connected to the upper abutment structure 115.

[0040] The upper abutment structure 115 can be modularly replaced according to different wheel hub models, and typically includes components such as a connecting plate, a buffer pad, a center positioning head, and a pressure distribution plate. The center positioning head matches the center hub hole of the wheel hub, and can automatically center during the pressing process; the buffer pad (such as polyurethane or rubber material) is used to absorb impact and evenly distribute pressure to avoid damage to the wheel hub surface; the pressure distribution plate ensures that the load is evenly transmitted across the entire contact surface, improving the correction accuracy. During operation, the upper mold hydraulic cylinder 114 drives the upper abutment structure 115 to descend vertically, contacting the top of the wheel hub that has been lifted and pre-positioned by the lower mounting platform 112, applying a set pressure, thereby accurately rounding and clamping the center hub area (such as the wheel disc or spoke connection part) of the wheel hub, providing a stable clamping reference for subsequent wheel rim straightening processes.

[0041] The rim straightening assembly 103 also includes a floating buffer structure, which includes an adjusting rod 116, a limiting rod 117, and a buffer spring 118. The adjusting rod 116 is threadedly connected to the bottom support plate 106. The limiting rod 117 is slidably disposed on one side of the top pressure plate 109 and is symmetrically disposed with respect to the adjusting rod 116. The buffer spring 118 is disposed between the limiting rod 117 and the top pressure plate 109.

[0042] The adjusting rod 116 adopts a high-strength threaded rod design. One end is adjustablely connected to the bottom support plate 106 via a precision threaded pair, and the other end extends upward and approaches the corresponding position of the top pressure plate 109. By rotating the adjusting rod 116, its extension length can be finely adjusted, thereby setting the initial distance or preload between the bottom support plate 106 and the top pressure plate 109 to adapt to the height differences of different rim models and achieve personalized configuration of the straightening stroke.

[0043] Symmetrically positioned to the adjusting rod 116 is the limiting rod 117, which is vertically arranged and slides through a guide hole or linear bearing 123 on one side of the top pressure plate 109, ensuring that it can only move smoothly in the vertical direction without lateral deviation. The lower end of the limiting rod 117 is usually provided with a stop flange or connector for cooperating with the buffer spring 118; the upper end can be linked with the external frame or sensing device to monitor the displacement status or trigger a safety protection mechanism.

[0044] A buffer spring 118 is provided between the limiting rod 117 and the top pressure plate 109. It is preferably a disc spring assembly with high fatigue life, a helical compression spring, or a polyurethane elastomer. The buffer spring 118 is in a pre-compressed state under normal working conditions. When the top pressure plate 109 is pressed downward by the top moving part 110, if it encounters a local bulge in the rim, uneven material rebound, or assembly error, the limiting rod 117 will make a slight displacement relative to the top pressure plate 109, compressing the buffer spring 118, thereby absorbing the instantaneous impact energy and preventing rigid collisions.

[0045] The floating buffer structure also has an overload protection function: when the straightening resistance increases abnormally (such as severe deformation of the wheel rim or obstruction by foreign objects), the buffer spring 118 reaches its maximum compression stroke, the limit rod 117 triggers the limit switch or displacement sensor, and the system can automatically stop the operation and issue an alarm to ensure the safety of the equipment and the workpiece.

[0046] The rim straightening assembly 103 also includes a rotating structure, which is used to drive the rim hub to rotate by a preset angle and then straighten it again.

[0047] The rotating structure includes a rotating motor 119, a rotating gear 120, a rotating gear ring 121, a rotating platform 122, and a bearing 123. The rotating motor 119 is fixed to one side of the bottom support plate 106. The rotating gear 120 is connected to the output end of the rotating motor 119. The rotating platform 122 is rotatably disposed between the bottom support plate 106 and the support column 111. The bearing 123 is disposed between the rotating platform 122 and the bottom support plate 106. The rotating gear ring 121 is fixedly connected to the rotating platform 122 and meshes with the rotating gear 120.

[0048] The rotating motor 119 serves as the power source, preferably a servo motor or a stepper motor with an encoder. It is fixedly mounted on one side of the bottom support plate 106 and securely connected by a bracket to ensure no vibration or deviation during operation. The motor has precise angle control and torque feedback functions, and can accurately drive the wheel hub to rotate to the target position according to a preset program or real-time detection data.

[0049] The rotating gear 120 is mounted on the output shaft of the rotating motor 119. It is typically a high-precision helical or spur gear, and is surface hardened to improve wear resistance and transmission smoothness. This gear meshes with the rotating gear ring 121 below to form a primary reduction transmission pair, converting the high-speed, low-torque output of the motor into low-speed, high-torque motion suitable for hub rotation.

[0050] The rotating gear ring 121 is an annular structure, with its outer edge having teeth that match those of the rotating gear 120, and its inner edge being rigidly fixed to the rotating platform 122 by bolts or a stop structure. The rotating platform 122 is generally disc-shaped, with a through hole in the center for accommodating the hub center hole or positioning pin. Its upper surface can integrate an auxiliary clamping device or a positioning reference surface to ensure that the hub maintains coaxiality and stability during rotation.

[0051] The rotating platform 122 is supported by a precision bearing 123 and is installed between the bottom support plate 106 and the support column 111. Specifically, the bearing 123 (usually a crossed roller bearing 123, a deep groove ball bearing 123, or a thrust-radial combination bearing 123) is embedded between the bottom surface of the rotating platform 122 and the top surface of the bottom support plate 106. It not only bears the radial load of the hub and the rotating platform 122, but also effectively resists the overturning moment that may be generated during the straightening process, ensuring that the rotation process is smooth, without shaking, and has high repeatability (within ±0.1°).

[0052] During operation, after one round of straightening is completed, the top pressure plate 109 is released. The control system then issues a command to start the rotating motor 119, which drives the rotating gear 120 to synchronously rotate the rotating ring 121 and the fixed rotating table 122, thereby driving the positioned wheel hub to rotate precisely to a preset angle. Once in position, the motor automatically returns to its self-locking position or is locked by the brake. The top pressure plate 109 and the bottom conforming mold 107 then work together again to straighten the deformed area of ​​the wheel rim at its new position. This process can be repeated multiple times until the entire circumference of the wheel rim meets the dimensional and positional tolerance requirements.

[0053] The bottom moving part 108 includes a drive motor 124, a transmission rod 125, a transmission belt 126, a pulley 127, a bevel gear set 128, and a rotating threaded rod 129. The rotating threaded rod 129 is threadedly connected to the bottom support plate 106. The bevel gear set 128 is connected to the rotating threaded rod 129. The pulley is used to drive the bevel gear set 128 to rotate. The transmission rod 125 is rotatably mounted on the support frame 101. The transmission belt 126 is rotatably connected to the transmission rod 125 and the pulley 127. The drive motor 124 is used to drive the transmission rod 125 to rotate.

[0054] The drive motor 124 serves as the power source for the entire bottom moving part 108. It is preferably a servo motor or a stepper motor with a reducer, and is fixedly mounted on the side or bottom base of the support frame 101. This motor has precise position control and speed adjustment capabilities. The lifting stroke, speed, and acceleration can be set according to process requirements to ensure that the contour mold 107 moves smoothly and is accurately positioned when contacting the wheel rim, avoiding impact damage.

[0055] The output shaft of the drive motor 124 is connected to the transmission rod 125 via a coupling. The transmission rod 125 is a high-rigidity metal shaft, rotatably mounted on the support frame 101 via a bearing 123 or a linear support unit, extending horizontally to transmit the rotational power of the motor to the remote actuator. To ensure synchronization and reduce vibration, the transmission rod 125 can adopt a hollow shaft structure and undergo dynamic balancing.

[0056] A drive pulley 127 is installed at one end or in the middle of the transmission rod 125. This pulley 127 forms a belt drive pair with another driven pulley 127 via a transmission belt 126 (such as a synchronous toothed belt or a high-strength flat belt). The driven pulley 127 is coaxially fixed with the drive bevel gear in the bevel gear set 128. When the drive motor 124 starts, it drives the transmission rod 125 to rotate, and transmits power to the bevel gear set 128 through the transmission belt 126, realizing the conversion of the power direction from horizontal to vertical.

[0057] The bevel gear set 128 consists of a pair of mutually perpendicular meshing bevel gears, including a horizontally arranged driving bevel gear and a vertically arranged driven bevel gear. The central hole of the driven bevel gear is rigidly connected to the upper end of the rotating threaded rod 129 via a keyway or flange structure. When the bevel gear set 128 is driven to rotate, the rotating threaded rod 129 rotates synchronously.

[0058] The rotating threaded rod 129 is a high-precision ball screw or trapezoidal screw with continuous threads on its outer circumference, forming a helical pair connection with the internal threaded hole or nut seat on the bottom support plate 106. When the rotating threaded rod 129 rotates, the bottom support plate 106 can only move up and down due to the constraint of the guide column or slide rail. Therefore, the threaded pair converts the rotational motion into linear lifting motion, thereby driving the entire bottom support plate 106 and the contour mold 107 above it to rise or fall smoothly.

[0059] To enhance system rigidity and anti-loosening performance, the rotating threaded rod 129 is typically fixed inside the support frame 101 via upper and lower double bearing seats 123, ensuring that it maintains high rotational accuracy when subjected to large axial loads. Meanwhile, the lifting path of the bottom support plate 106 is limited by a precision linear guide rail 130 or a guide sleeve to prevent swaying or jamming.

[0060] The rim straightening assembly 103 also includes a guide rail 130, which is disposed on the support frame 101 and slidably connected to the bottom support plate 106 and the top pressure plate 109.

[0061] The guide rail 130 is one or more pairs of high-rigidity linear guide rails 130 (such as roller or ball-bearing linear slide rails), which are firmly installed on the inner column or vertical frame of the support frame 101 and extend vertically. The bottom support plate 106 and the top pressure plate 109 are slidably connected to the corresponding guide rail 130 through sliders or slide blocks, so that they can only make precise up-and-down linear movements along the axis of the guide rail 130, effectively suppressing lateral offset, torsion or sway.

[0062] The wheel hub straightening press also includes a feeding assembly, which includes a feeding moving part 131, a support arm 132, and a clamping arm 133. The clamping arm 133 is used to clamp the wheel hub to be straightened, and the support arm 132 is used to support the clamping arm 133. The feeding moving part 131 is connected to the support arm 132 and is used to drive the support arm 132 to move to a designated position.

[0063] To achieve automation and efficiency in wheel hub loading and unloading, the wheel hub straightening press of this invention also integrates a loading component, completely replacing the traditional manual handling method and improving operational safety and production cycle.

[0064] The clamping arm 133, as the actuating end that directly contacts the wheel hub, can be configured as a pneumatic parallel gripper, a hydraulic self-centering chuck, or a mechanical clamping structure with flexible padding, depending on the wheel hub type (such as steel or aluminum alloy, multi-spoke or few-spoke structure). The inner side of the clamping arm 133 is equipped with anti-slip and wear-resistant material (such as polyurethane or rubber coating), and pressure sensors are integrated at key contact points to ensure that the wheel hub is firmly gripped during the clamping process without damaging its surface finish or precision mating surfaces.

[0065] The support arm 132 is used to support the clamping arm 133 and transmit motion. It is usually made of high-strength aluminum alloy or welded steel structure, which combines lightweight and high rigidity. One end of the support arm 132 is hinged or fixedly connected to the clamping arm 133, and the other end is connected to the loading moving part 131. Its structure can be designed as a single-arm cantilever type, a double-arm symmetrical type, or a gantry type to adapt to different workshop layouts and wheel hub size ranges.

[0066] The loading and unloading moving component 131 serves as a drive unit and can take the form of a servo linear module, gantry robot, track-walking trolley, or six-axis collaborative robot, and can be fixed to the equipment base, top beam, or ground track. This moving component can drive the support arm 132 to perform multi-degree-of-freedom movements in the horizontal plane (XY direction) and even the vertical direction (Z direction), accurately moving the clamped wheel hub to be shaped from the loading position (such as a conveyor line, silo, or buffer platform) to the central working area of ​​the wheel hub positioning component 102, and moving it out to the unloading position after the shaping is completed.

[0067] The entire feeding process is centrally controlled and can be linked with wheel hub identification systems (such as RFID, barcode scanning, or visual positioning) to automatically identify the wheel hub model and call up the corresponding clamping parameters and path planning. Simultaneously, the feeding assembly has a safety interlock function: the straightening press is only allowed to start after the wheel hub is fully in place and the clamping arm 133 has returned to its safe position; conversely, before straightening is complete, the feeding assembly remains locked to prevent accidental operation that could lead to equipment collisions or personal injury.

[0068] Second embodiment: The present invention also provides a control method for a wheel hub straightening press, including: S201 Places the wheel hub onto the lifting structure 104 and raises it to a preset position via the lifting structure 104; The wheel hub to be corrected is placed on the lower mounting platform 112 of the lifting structure 104 using a manual or automatic feeding assembly. After the control system is activated, the lower mold hydraulic cylinder 113 is driven to move, causing the support column 111 and the lower mounting platform 112 to rise smoothly, raising the wheel hub to a preset working height position. This preset position is pre-calibrated according to the wheel hub model and can be adjusted via a human-machine interface. During the lifting process, the system can integrate position sensors to monitor the lifting stroke in real time, ensuring that the wheel hub accurately reaches the correction reference surface; at the same time, the positioning elements on the lower mounting platform 112 automatically align with the bottom structure of the wheel hub, completing the initial positioning and providing a geometric reference for subsequent correction.

[0069] S202 initiates the downward pressure correction structure 105 to compress and correct the center hub of the wheel hub. Once the wheel hub reaches the preset position, the control system triggers the downward pressure correction structure 105. The upper mold hydraulic cylinder 114 activates, driving the upper support structure 115 vertically downwards, bringing it into contact with the center area of ​​the wheel hub top (usually the junction of the wheel disc or spokes). Under a set pressure or displacement threshold, the upper and lower structures work together to apply opposing pressure, compressing and axially clamping the center hub bore area. This step not only eliminates minor deformations in the center area caused by impact or fatigue but also firmly clamps the wheel hub between the upper and lower correction structures, forming a stable rigid support system to prevent displacement or vibration during subsequent rim straightening. During the correction process, the system can collect data from pressure and displacement sensors in real time. If abnormal resistance or excessive displacement is detected, the system will automatically pause operation and issue an alarm.

[0070] After the center correction of S203 is completed, the bottom support plate 106 is moved upward to drive the contour mold 107 to move upward and contact the bottom of the rim. At the same time, the top moving part 110 is activated to drive the top pressure plate 109 to move downward to contact the top of the rim, thereby correcting the rim.

[0071] Once the center alignment is complete and the system confirms that the clamping state is stable, the rim straightening stage begins. At this time, the control system simultaneously activates the bottom moving part 108 and the top moving part 110. The bottom moving part 108 drives the rotating threaded rod 129 to rotate, and through the threaded pair, it drives the bottom support plate 106 to move smoothly upward along the guide rail 130, so that the contour mold 107 installed on it gradually approaches and finally closely fits the reference contour surface of the lower part of the rim. At the same time, the top moving part 110 drives the top pressure plate 109 to move down synchronously along the guide rail 130, so that its pressure head or pressure block contacts the corresponding deformation area on the upper side of the rim.

[0072] Under the combined action of the upper and lower bidirectional forces, the locally deformed areas of the rim (such as dents, warps, or elliptical regions) undergo controllable plastic deformation under the support of the conforming mold 107 and the pressure of the top pressure plate 109, gradually restoring them to their standard geometric shape. The straightening pressure, holding time, and stroke can be automatically matched according to the rim material (such as aluminum alloy or steel), the degree of deformation, and the process database. In addition, if the equipment is equipped with a floating buffer structure, the system can also dynamically adjust the contact stiffness to avoid overshoot or surface damage.

[0073] After the S204 straightening is completed, the top pressure plate is released, and the bottom support plate and the contouring mold are rotated to drive the rim to rotate by a preset angle. The bottom support plate and the contouring mold return to their original positions, and then the top pressure plate is pressed down again to perform a second straightening of the rim.

[0074] Furthermore, after a single straightening is completed, the control system can automatically call the rotating structure according to the preset program or visual inspection results, drive the wheel hub to rotate by a preset angle (such as 45° or evenly divided according to the number of spokes), and repeat step S203 to achieve multi-point cyclic straightening of the wheel rim around the entire circumference until key indicators such as overall roundness and runout meet the factory tolerance requirements.

[0075] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A wheel hub straightening press, characterized in that, The device includes a support frame, a wheel hub positioning assembly, and a wheel rim straightening assembly. The wheel hub positioning assembly includes a lifting structure and a pressing and correcting structure. The lifting structure is located below the support frame, and the pressing and correcting structure is located above the support frame. The lifting structure is used to lift the wheel hub and cooperate with the pressing and correcting structure to fix and correct the center hub of the wheel hub. The rim straightening assembly includes a bottom support plate, a contouring mold, a bottom moving part, a top pressure plate, and a top moving part. The bottom support plate is disposed on one side of the lifting structure, the contouring mold is disposed on the bottom support plate, and the bottom moving part is used to drive the bottom support plate to move upward so that the contouring mold contacts the lower reference surface of the rim. The top pressure plate is disposed on one side of the downward pressing and straightening structure, and the top moving part is used to drive the top pressure plate to move downward to apply pressure to the rim and straighten the lower side of the rim.

2. The hub straightening press as described in claim 1, characterized in that, The lifting structure includes a support column, a lower mounting platform, and a lower mold hydraulic cylinder. The support column is slidably disposed below the support frame. The output end of the lower mold hydraulic cylinder is connected to the support column. The lower mounting platform is fixed on the support column and is used for pre-positioning the wheel hub.

3. The hub straightening press as described in claim 2, characterized in that, The downward pressure correction structure includes an upper mold hydraulic cylinder and an upper abutment structure. The upper mold hydraulic cylinder is fixed above the support frame, and the upper abutment structure is connected to the output end of the upper mold hydraulic cylinder.

4. A hub straightening press as described in claim 3, characterized in that, The rim straightening assembly also includes a floating buffer structure, which includes an adjusting rod, a limiting rod, and a buffer spring. The adjusting rod is threadedly connected to the bottom support plate. The limiting rod is slidably disposed on one side of the top pressure plate and is symmetrically disposed with respect to the adjusting rod. The buffer spring is disposed between the limiting rod and the top pressure plate.

5. A wheel hub straightening press as described in claim 4, characterized in that, The rim straightening assembly also includes a rotating structure, which is used to drive the rim hub to rotate by a preset angle and then straighten it again.

6. A wheel hub straightening press as described in claim 5, characterized in that, The rotating structure includes a rotating motor, a rotating gear, a rotating gear ring, a rotating platform, and a bearing. The rotating motor is fixed to one side of the bottom support plate. The rotating gear is connected to the output end of the rotating motor. The rotating platform is rotatably disposed between the bottom support plate and the support column. The bearing is disposed between the rotating platform and the bottom support plate. The rotating gear ring is fixedly connected to the rotating platform and meshes with the rotating gear.

7. A wheel hub straightening press as described in claim 6, characterized in that, The bottom moving component includes a drive motor, a transmission rod, a transmission belt, a pulley, a bevel gear set, and a rotating threaded rod. The rotating threaded rod is threadedly connected to the bottom support plate, the bevel gear set is connected to the rotating threaded rod, the pulley is used to drive the bevel gear set to rotate, the transmission rod is rotatably mounted on the support frame, the transmission belt is rotatably connected to the transmission rod and the pulley, and the drive motor is used to drive the transmission rod to rotate.

8. A wheel hub straightening press as described in claim 7, characterized in that, The rim straightening assembly also includes a guide rail, which is mounted on the support frame and slidably connected to the bottom support plate and the top pressure plate.

9. A wheel hub straightening press as described in claim 8, characterized in that, The wheel hub straightening press also includes a feeding assembly, which includes a feeding moving part, a support arm, and a clamping arm. The clamping arm is used to clamp the wheel hub to be straightened, and the support arm is used to support the clamping arm. The feeding moving part is connected to the support arm and is used to drive the support arm to move to a designated position.

10. A control method for a wheel hub straightening press, applied to the wheel hub straightening press described in claim 9, characterized in that, include: The wheel hub is placed on the lifting structure and raised to a preset position by the lifting structure. The downward pressure correction structure and the lifting structure work together to compress and correct the center hub of the wheel hub. After the center correction is completed, the bottom support plate is moved upward to drive the contour mold to move upward and contact the bottom of the rim at the edge of the wheel hub. At the same time, the top moving part is activated to drive the top pressure plate to move downward to contact and cooperate with the top of the rim to correct the rim. After the straightening is completed, the top pressure plate is released, and the bottom support plate and the contouring mold are rotated to drive the rim to rotate by a preset angle. The bottom support plate and the contouring mold return to their original positions, and then the top pressure plate is pressed down again to perform a second straightening of the rim.

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