Perpendicularity detection system and method of slewing bearing device

Abstract

The invention discloses a vertical detection system and method for a slewing bearing device, the vertical detection system comprises a first pressing plate, a second pressing plate, a third pressing plate and a pull rod, the first pressing plate and the second pressing plate are arranged at intervals, a first driving part can drive the third pressing plate to move in the direction away from the second pressing plate, so that the slewing bearing bears an axial load, and a second driving part can drive the third pressing plate to move in the direction away from the second pressing plate. The detection piece can detect the axial load loaded on the slewing bearing device, and can synchronously capture the numerical value of the loaded axial load in real time, so that the slewing function test of the slewing bearing under the action of the vertical load is realized, the defect that the slewing function test method under the vertical load is lacked in the prior art is accurately overcome, and the test efficiency is improved. The core problems of shutdown and low efficiency of load adjustment are solved, the technical effects of vertical load test coverage, load adjustment automation and detection data precision are achieved, the detection cost of the slewing bearing is effectively reduced, and the quality and efficiency of test detection are improved.

Description

Technical Field

[0001] This application relates to the field of vehicle device testing technology, and in particular to a vertical testing system and method for a slewing bearing device. Background Technology

[0002] In automotive chassis systems, the corner module, as a core component, integrates key devices such as the steering system, suspension system, wheels, and parking brake. It can simultaneously realize multiple core functions such as steering, vibration damping, driving, and braking. The slewing bearing, as a key assembly in the corner module that realizes the slewing and steering functions, directly determines the operating performance of the corner module and even the entire chassis system, and is one of the core components of the automotive corner module system. Vehicle slewing bearings are widely used in heavy equipment such as cranes and excavators, as well as heavy and super-heavy-duty vehicles, due to their strong ability to withstand comprehensive loads, including large axial loads, radial loads, and overturning moments. Furthermore, their stable transmission and high efficiency have led to their widespread application in the field of robotic arms.

[0003] It is important to note that the driving performance quality of vehicle slewing bearings directly affects their reliability and service life in on-the-spot slewing in actual application scenarios. Therefore, comprehensive and efficient performance testing is crucial. However, existing technologies for slewing bearing testing have significant shortcomings. On the one hand, current slewing bearing testing largely relies on manual labor combined with mechanical equipment to complete overturning moment testing, and no method has yet been proposed to test the slewing function under vertical loads. This results in incomplete testing parameters and an inability to fully assess the core performance of the slewing bearing under actual working conditions. On the other hand, most slewing bearing testing equipment requires first decelerating the rotating slewing bearing to a complete stop when adjusting the test load and speed, and then adjusting the load by adding or removing counterweights. This process is not only inefficient but also consumes a significant amount of testing time, leading to high inspection costs and labor expenditures for slewing bearings, and the overall testing efficiency is insufficient to meet actual production needs.

[0004] Against this backdrop, there is an urgent need for a slewing bearing testing method that is highly efficient, highly automated, and has relatively comprehensive testing parameters, in order to solve the aforementioned problems in the existing technology. Summary of the Invention

[0005] In view of the deficiencies in the prior art, this application provides a vertical detection system and method for slewing bearing devices to solve the problems of low detection efficiency and high complexity of slewing bearings in the prior art.

[0006] The above-mentioned objectives of this application are mainly achieved through the following technical solutions: A vertical detection system for a slewing bearing device, the vertical detection system comprising: A first pressure plate and a second pressure plate are arranged at intervals. The first pressure plate is used to connect to the upper inner ring of the slewing bearing device, and the second pressure plate is used to connect to the lower outer ring of the slewing bearing device and the brake disc. The third pressure plate is arranged at intervals on the side of the second pressure plate away from the first pressure plate, and a first driving member is provided between the third pressure plate and the second pressure plate. The first driving member can drive the third pressure plate to move away from the second pressure plate. A tie rod extends axially through the first pressure plate and the second pressure plate of the slewing bearing device and is connected to the third pressure plate. A detection element is provided at one end of the tie rod extending to the upper part of the first pressure plate. The detection element is arranged on the side of the first pressure plate away from the slewing bearing device so that when the first drive member drives the third pressure plate to move, the detection element can detect the axial load applied to the slewing bearing device.

[0007] In an optional embodiment, a thrust ball bearing is provided between the first pressure plate and the detection element, and a recessed groove is provided on the end face of the first pressure plate, with the thrust ball bearing being engaged in the recessed groove.

[0008] In an optional embodiment, a mounting base is provided between the thrust ball bearing and the detection element, the mounting base, the thrust ball bearing and the tie rod are arranged coaxially, and the detection end of the detection element abuts against the end face of the mounting base.

[0009] In an optional embodiment, the mounting base is provided with a receiving groove, the end of the pull rod extends into the receiving groove, and the detection element is detachably connected to the pull rod via a mounting block arranged in the receiving groove.

[0010] In an optional embodiment, a positioning cylinder is provided between the second pressure plate and the third pressure plate, the positioning cylinder is connected to the second pressure plate, and the third pressure plate is provided with a boss that cooperates with the positioning cylinder, and the first driving member is sleeved on the positioning cylinder.

[0011] In an optional implementation, the first drive component is a hydraulic nut assembly.

[0012] In an optional embodiment, the end of the pull rod away from the detection element is provided with a threaded fastening nut, which is pressed against the end face of the third pressure plate away from the second pressure plate.

[0013] In an optional embodiment, the vertical detection system further includes a mounting bracket, which includes a top plate for fixing the mounting position of the first pressure plate and a side plate for fixing the upper slewing outer ring of the slewing bearing device. The side plate is provided with a brake caliper for engaging with the brake disc.

[0014] In an optional embodiment, a fixing seat is fixedly provided on the side plate, the fixing seat is used to fixally connect the upper rotating outer ring, and the brake caliper is provided with at least two.

[0015] Based on the same inventive concept, this application also provides a vertical detection method for a slewing bearing device, wherein the vertical detection method is applied to the vertical detection system described above, and the vertical detection method includes: Connect the first pressure plate to the top plate, connect the second pressure plate to the brake disc, and assemble the brake disc to cooperate with the brake caliper; Take the slewing bearing device to be tested, connect the first pressure plate to the upper slewing inner ring, and connect the second pressure plate to the lower slewing outer ring; The first driving component is operated to drive the third pressure plate to move away from the second pressure plate; The axial load applied to the slewing bearing device is detected by the detection component. Control the first driving component to output different driving forces, and detect and obtain the reliability data of the slewing bearing device; Connect the upper slewing outer ring of the slewing bearing device to the side plate, operate the slewing bearing device, and drive the lower slewing outer ring to rotate; The brake caliper is operated to clamp the brake disc, and the rotational resistance torque of the brake caliper is detected and recorded to obtain the rotational smoothness data of the slewing bearing device.

[0016] Compared with the prior art, the advantages of this application are: The vertical detection system described in this application is used for vertical detection of a slewing bearing device. The system includes a first pressure plate, a second pressure plate, a third pressure plate, and a tie rod arranged at intervals. The first pressure plate is fixedly connected to the upper inner slewing ring of the slewing bearing device, and the second pressure plate is fixedly connected to the lower outer slewing ring and the brake disc of the slewing bearing device. The third pressure plate is arranged at intervals on the side of the second pressure plate away from the first pressure plate, and a first driving member is provided between the third pressure plate and the second pressure plate. The first driving member can drive the third pressure plate to move away from the second pressure plate. The tie rod passes through the first pressure plate and the second pressure plate along the axial direction of the slewing bearing device and is fixedly connected to the third pressure plate. One end of the tie rod is provided with a detection element, which is arranged on the side of the first pressure plate away from the slewing bearing device, so that when the first driving member drives the third pressure plate to move, the detection element can detect the axial load applied to the slewing bearing device.

[0017] The vertical detection system uses a first pressure plate and a second pressure plate to firmly fix the upper inner ring, lower outer ring, and brake disc of the slewing bearing, ensuring the stability of the slewing bearing itself during testing and providing a reliable reference for subsequent load loading. The third pressure plate is arranged at intervals with the second pressure plate, and the first drive component between the two can provide linear driving force. The tie rod passes through the first and second pressure plates along the axial direction of the slewing bearing and is fixed to the third pressure plate. The detection component at one end of the tie rod is located on the side of the first pressure plate away from the slewing bearing, forming a complete link of driving, force transmission, and detection.

[0018] When a vertical (axial) load needs to be applied to the slewing bearing, the first drive component drives the third pressure plate to move away from the second pressure plate. This movement is converted into an axial tensile force on the slewing bearing through the tie rod. Since one end of the tie rod is connected to the third pressure plate and the other end is indirectly connected to the first pressure plate through the detection component, the tensile force will directly act between the inner and outer rings of the slewing bearing, so that the slewing bearing bears the axial load. At the same time, the detection component can synchronously capture the value of the applied axial load in real time, thereby realizing the slewing function test of the slewing bearing under vertical load. This fills the gap in the vertical load test scenario in the existing technology and solves the problem of incomplete detection parameters and inability to evaluate the performance under vertical working conditions.

[0019] In the load adjustment stage, unlike existing technologies that require manual addition or removal of counterweights after machine shutdown, the movement distance of the third pressure plate can be adjusted simply by controlling the output power or stroke of the first drive component. This, in turn, changes the tension of the tie rod on the slewing bearing, enabling flexible and continuous adjustment of the axial load. The entire process requires no machine shutdown or manual intervention, significantly shortening the load adjustment time, improving testing efficiency, and reducing labor costs. Simultaneously, the testing component and load loading are performed synchronously, ensuring the real-time accuracy of load data and avoiding errors from manual readings. Furthermore, the system's structure, with its pressure plate fixation and tie rod force transmission, maintains the stable posture of the slewing bearing during loading, ensuring its normal rotation function. It can simultaneously perform rotational performance testing under vertical loads, further expanding the practicality of the testing scenarios.

[0020] This vertical testing system transforms driving power into precise vertical load loading and synchronous testing. It not only precisely overcomes the core problems in existing technologies, such as the lack of testing methods for slewing function under vertical load and the need to stop the machine for load adjustment, resulting in low efficiency, but also achieves technical effects such as comprehensive vertical load testing, automated load adjustment, and accurate test data. This effectively reduces the inspection cost of slewing bearings and improves the quality and efficiency of testing. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a partial sectional view of the slewing bearing device after assembly, as provided in the embodiments of this application. Figure 2 A schematic diagram of the slewing bearing device assembled onto the mounting frame according to an embodiment of this application; In the diagram: 100, slewing bearing device; 101, upper-level inner slewing ring; 102, upper-level outer slewing ring; 103, lower-level outer slewing ring; 103, brake disc; 201, first pressure plate; 202, second pressure plate; 203, third pressure plate; 301, first driving component; 302, tie rod; 303, detection component; 304, thrust ball bearing; 401, sinker; 402, mounting base; 403, receiving groove; 404, positioning cylinder; 405, boss; 406, fastening nut; 407, mounting block; 600, mounting bracket; 601, top plate; 602, side plate; 603, brake caliper; 604, fixed base. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are merely for describing exemplary embodiments of the invention. However, the invention can be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0024] like Figure 1 As shown, Figure 1 This is a partial sectional view of the slewing bearing device after assembly according to an embodiment of this application; a vertical detection system for a slewing bearing device 100, the vertical detection system including a first pressure plate 201 and a second pressure plate 202, a third pressure plate 203 and a tie rod 302 arranged at intervals, wherein: A first pressure plate 201 and a second pressure plate 202 are arranged at intervals. The first pressure plate 201 is fixedly connected to the upper inner slewing ring 101 of the slewing bearing device 100, and the second pressure plate 202 is fixedly connected to the lower outer slewing ring 103 and the brake disc 103 of the slewing bearing device 100.

[0025] like Figure 1As shown, the first pressure plate 201 and the second pressure plate 202, arranged at intervals, serve as fixed components of the slewing bearing device 100. Both are made of high-strength alloy material to avoid deformation due to load during the testing process, which would affect accuracy. The shape of the first pressure plate 201 is adapted to the outer circumferential contour of the upper-level slewing inner ring 101 of the slewing bearing device 100. The first pressure plate 201 is provided with a group of bolt holes for connecting to the inner ring. The bolt holes are evenly distributed along the circumference of the inner ring. The upper-level slewing inner ring 101 is rigidly connected by high-strength bolts to ensure that the inner ring has no relative displacement during the testing process. The second pressure plate 202 is adapted to the structure of the lower-level slewing outer ring 103 and the brake disc 103. The second pressure plate 202 is provided with circumferentially distributed bolt holes. The lower-level slewing outer ring 103 and the brake disc 103 are fixed by bolts, which not only achieves synchronous fixing of the outer ring and the brake disc 103, but also simulates the assembly relationship of the slewing bearing in actual working conditions, providing a real working condition basis for subsequent testing.

[0026] like Figure 1 As shown, the third pressure plate 203 is arranged at intervals on the side of the second pressure plate 202 away from the first pressure plate 201, and a first driving member 301 is provided between the third pressure plate 203 and the second pressure plate 202. The first driving member can drive the third pressure plate 203 to move away from the second pressure plate 202.

[0027] like Figure 1 As shown, the third pressure plate 203 is spaced apart on the side of the second pressure plate 202 away from the first pressure plate 201. The size of the third pressure plate 203 is adapted to the second pressure plate 202 to ensure balanced force. A first driving member 301 is provided between the third pressure plate 203 and the second pressure plate 202. The first driving member 301 has the characteristics of precise and controllable stroke and stable thrust output. The two ends of the first driving member 301 are respectively connected to the second pressure plate 202 and the third pressure plate 203. When the first driving member 301 is started, it drives the third pressure plate 203 to move axially away from the second pressure plate 202.

[0028] like Figure 1 As shown, the tie rod 302 passes through the first pressure plate 201 and the second pressure plate 202 along the axial direction of the slewing bearing device 100 and is fixedly connected to the third pressure plate 203. One end of the tie rod 302 is provided with a detection element 303. The detection element 303 is arranged on the side of the first pressure plate 201 away from the slewing bearing device 100 so that when the first driving member 301 drives the third pressure plate 203 to move, the detection element 303 can detect the axial load applied to the slewing bearing device 100.

[0029] like Figure 1As shown, the tie rod 302, as a force transmission component, can be forged from high-strength alloy steel to ensure no plastic deformation when subjected to large tensile forces. The tie rod 302 passes through the first pressure plate 201 and the second pressure plate 202 sequentially along the axial direction of the slewing bearing. A guide sleeve is provided at the part of the tie rod 302 that passes through the first pressure plate 201 and the second pressure plate 202. The guide sleeve is made of wear-resistant copper alloy material, which reduces frictional loss between the tie rod 302 and the pressure plate and ensures the coaxiality of the movement of the tie rod 302. One end of the tie rod 302 is fixedly connected to the third pressure plate 203, and the other end is rigidly connected to the detection element 303. The detection element 303 is a high-precision tensile sensor. The signal output end of the detection element 303 is connected to the data acquisition and analysis system through a shielded data cable, so as to receive, display and store axial load data in real time, which facilitates the traceability and analysis of subsequent test results.

[0030] like Figure 1 As shown, during actual operation, when an axial load needs to be applied to the slewing bearing, the first drive component 301 pushes the third pressure plate 203 axially away from the second pressure plate 202 according to the control system command. The third pressure plate 203 drives the tie rod 302 to move synchronously. The tie rod 302 generates an axial tension on the first pressure plate 201 through the tension sensor. The first pressure plate 201 then transmits the tension to the upper inner slewing ring 101 of the slewing bearing, while the second pressure plate 202 fixes the lower outer slewing ring 103, so that a stable axial load is formed between the inner and outer rings of the slewing bearing. During this process, the tension sensor... Load data is collected and transmitted to the data acquisition system in real time, allowing staff to monitor the load magnitude. If the load needs to be adjusted, the operating status of the first drive component 301 can be adjusted through the control system to change the moving distance of the third pressure plate 203, thereby adjusting the tension of the pull rod 302. This enables continuous and stepless adjustment of the load without stopping the machine to add or remove counterweights, ensuring a stable and reliable testing process. This not only solves the problems of lack of vertical load testing methods and low load adjustment efficiency in existing technologies, but also further improves the testing accuracy and scene adaptability through structural detail optimization and working condition expansion.

[0031] In an optional embodiment, the vertical detection system of this application is used for vertical detection of the slewing bearing device 100. The vertical detection system includes a first pressure plate 201 and a second pressure plate 202, a third pressure plate 203, and a tie rod 302 arranged at intervals. The first pressure plate 201 is fixedly connected to the upper-level inner slewing ring 101 of the slewing bearing device 100. The second pressure plate 202 is fixedly connected to the lower-level outer slewing ring 103 and the brake disc 103 of the slewing bearing device 100. The third pressure plate 203 is arranged at intervals on the side of the second pressure plate 202 away from the first pressure plate 201, and the third pressure plate 203 and the second pressure plate 202 are... A first driving member 301 is provided between 202, which can drive the third pressure plate 203 to move away from the second pressure plate 202; a tie rod 302 passes through the first pressure plate 201 and the second pressure plate 202 along the axial direction of the slewing bearing device 100 and is fixedly connected to the third pressure plate 203. A detection member 303 is provided at one end of the tie rod 302. The detection member 303 is arranged on the side of the first pressure plate 201 away from the slewing bearing device 100, so that when the first driving member 301 drives the third pressure plate 203 to move, the detection member 303 can detect the axial load applied to the slewing bearing device 100.

[0032] like Figure 1 As shown, the vertical detection system uses the first pressure plate 201 and the second pressure plate 202 to firmly fix the upper slewing inner ring 101, the lower slewing outer ring 103 and the brake disc 103 of the slewing bearing, respectively, to ensure the stability of the slewing bearing itself during testing and to provide a reliable reference for subsequent load loading. The third pressure plate 203 is arranged at intervals with the second pressure plate 202. The first driving component 301 between the two can provide linear driving force, while the tie rod 302 passes through the first and second pressure plates 202 along the slewing bearing axis and is fixed to the third pressure plate 203. The detection component 303 at one end of the tie rod 302 is located on the side of the first pressure plate 201 away from the slewing bearing, forming a complete link of driving, force transmission and detection.

[0033] When a vertical (axial) load needs to be applied to the slewing bearing, the first drive member 301 drives the third pressure plate 203 to move away from the second pressure plate 202. This movement is converted into an axial tensile force on the slewing bearing through the tie rod 302. Since one end of the tie rod 302 is connected to the third pressure plate 203 and the other end is indirectly connected to the first pressure plate 201 through the detection member 303, the tensile force will directly act between the inner and outer rings of the slewing bearing, so that the slewing bearing bears the axial load. At the same time, the detection member 303 can synchronously capture the applied axial load value in real time, thereby realizing the slewing function test of the slewing bearing under vertical load. This fills the gap in the vertical load test scenario in the prior art and solves the problem of incomplete test parameters and inability to evaluate the performance under vertical working conditions.

[0034] In the load adjustment stage, unlike existing technologies where manual addition or removal of counterweights is required after machine shutdown, the movement distance of the third pressure plate 203 can be adjusted simply by controlling the output power or stroke of the first drive component 301. This, in turn, changes the tension of the tie rod 302 on the slewing bearing, enabling flexible and continuous adjustment of the axial load. The entire process requires no machine shutdown or manual intervention, significantly shortening the load adjustment time, improving testing efficiency, and reducing labor costs. Simultaneously, the testing component 303 operates synchronously with the load loading action, ensuring the real-time accuracy of the load data and avoiding errors from manual readings. Furthermore, the system's structural arrangement of pressure plate fixation and tie rod 302 force transmission maintains the stable posture of the slewing bearing during loading, ensuring its normal rotation function and allowing simultaneous testing of rotational performance under vertical loads, further expanding the practicality of the testing scenarios.

[0035] This vertical testing system transforms driving power into precise vertical load loading and synchronous testing. It not only precisely overcomes the core problems in existing technologies such as "lack of testing methods for slewing function under vertical load" and "low efficiency due to the need to stop the machine for load adjustment," but also achieves the technical effects of "vertical load test coverage," "automated load adjustment," and "precise test data." This effectively reduces the inspection cost of slewing bearings and improves the quality and efficiency of testing.

[0036] like Figure 1 As shown, in an optional embodiment, a thrust ball bearing 304 is provided between the first pressure plate 201 and the detection element 303, and a recessed groove 401 is provided on the end face of the first pressure plate 201, and the thrust ball bearing 304 is engaged in the recessed groove 401.

[0037] like Figure 1 As shown, in an optional embodiment, to solve the interference of the slight rotation of the pull rod 302 on the accuracy of the test piece 303 during the testing process, a thrust ball bearing 304 is added between the first pressure plate 201 and the test piece 303. At the same time, a recessed groove 401 is machined on the end face of the first pressure plate 201 facing the test piece 303. The inner diameter of the recessed groove 401 is precisely matched with the outer ring diameter of the thrust ball bearing 304, and the gap is controlled within 0.02-0.05mm to ensure that the thrust ball bearing 304 has no radial offset. When the tie rod 302 rotates slightly circumferentially due to the rotation of the slewing bearing, the inner ring of the thrust ball bearing 304 can rotate synchronously with the tie rod 302, while the outer ring is fixed to the first pressure plate 201 by the recessed groove 401 and remains stationary. This effectively converts rotational friction into rolling friction, preventing the rotation of the tie rod 302 from being directly transmitted to the test piece 303 and causing fluctuations in the test data. At the same time, the recessed groove 401 can also axially limit the bearing, preventing the bearing from axially moving due to the load during the test, further improving the operational stability and data accuracy of the test system.

[0038] like Figure 1 As shown, in an optional embodiment, a mounting base 402 is provided between the thrust ball bearing 304 and the detection element 303. The mounting base 402, the thrust ball bearing 304, and the tie rod 302 are arranged coaxially, and the detection end of the detection element 303 abuts against the end face of the mounting base 402.

[0039] like Figure 1 As shown, in an optional embodiment, considering the potential unevenness of the force-bearing surfaces between the thrust ball bearing 304 and the detection element 303, a mounting base 402 is provided between the thrust ball bearing 304 and the detection element 303. The mounting base 402, the thrust ball bearing 304, and the tie rod 302 are arranged coaxially to ensure that the axial load is transmitted along the central axis, preventing damage to the detection element 303 due to radial additional force caused by eccentricity. The detection end of the detection element 303 is held against the end face of the mounting base 402 in a planar contact manner. The abutting surface of the mounting base 402 is precision ground to increase the contact area between the detection end and the mounting base 402, allowing the load to be evenly transmitted to the sensing element of the detection element 303. This avoids damage to the detection element 303 caused by localized force concentration and reduces detection errors caused by poor contact, making it particularly suitable for high-load detection scenarios.

[0040] like Figure 1 As shown, in an optional embodiment, the mounting base 402 is provided with a receiving groove 403, the end of the pull rod 302 extends into the receiving groove 403, and the detection element 303 is detachably connected to the pull rod 302 through a mounting block 407, the mounting block 407 being arranged in the receiving groove 403.

[0041] like Figure 1 As shown, in an optional embodiment, in order to facilitate the easy assembly and disassembly of the pull rod 302 and the detection element 303 and to achieve precise positioning, the mounting base 402 has a receiving groove 403 on the side facing the pull rod 302. The inner diameter of the receiving groove 403 is slightly larger than the end diameter of the pull rod 302. The end of the pull rod 302 can smoothly extend into the groove along the axis of the receiving groove 403. The depth of the receiving groove 403 matches the extension length of the end of the pull rod 302, ensuring that the end of the pull rod 302 does not exceed the end face of the mounting base 402. The detection component 303 is detachably connected to the pull rod 302 via the mounting block 407. The mounting block 407 can adopt a pressure ring structure, which facilitates the replacement of different specifications of the pull rod 302 or detection component 303 according to the detection requirements without disassembling the entire mounting base 402. Furthermore, the radial displacement of the pull rod 302 is restricted by the cooperation between the receiving groove 403 and the mounting block 407, further ensuring the coaxiality of the force transmission. At the same time, the mounting block 407 is hidden in the receiving groove 403, which can prevent external debris from contacting the connection part during the detection process and affecting the stability.

[0042] like Figure 1 As shown, in an optional embodiment, a positioning cylinder 404 is provided between the second pressure plate 202 and the third pressure plate 203. The positioning cylinder 404 is fixedly connected to the second pressure plate 202, and the third pressure plate 203 is provided with a boss 405 that cooperates with the positioning cylinder 404. The first driving member 301 is sleeved on the positioning cylinder 404.

[0043] like Figure 1 As shown, in an optional embodiment, to prevent radial displacement of the first driving component 301 during operation, a positioning cylinder 404 is added between the second pressure plate 202 and the third pressure plate 203. The positioning cylinder 404 is rigidly connected to the second pressure plate 202 by welding or high-strength bolts, and the axis of the positioning cylinder 404 is consistent with the axis of the slewing bearing. Correspondingly, a boss 405 is integrally formed on the end face of the third pressure plate 203 facing the second pressure plate 202. The outer diameter of the boss 405 matches the inner diameter of the positioning cylinder 404. The first driving component 301 is integrally fitted onto the outer circumference of the positioning cylinder 404. The positioning cylinder 404 not only provides radial support for the driving component, preventing it from tilting due to uneven force, but also accurately positions the driving component, ensuring that the force of the driving component is transmitted axially to the third pressure plate 203. This is especially suitable for scenarios where multiple driving components work simultaneously, ensuring synchronized output of each driving component and further improving the uniformity of load loading.

[0044] like Figure 1 As shown, in an optional embodiment, the first driving component 301 adopts a hydraulic nut assembly. The hydraulic nut assembly includes a hydraulic nut body, a sealing ring, and a pressure sensor. Compared with traditional servo electric cylinders, the hydraulic nut assembly has a larger output thrust and higher pressure regulation accuracy, making it more suitable for the high load detection requirements of heavy and super-heavy slewing bearings. The hydraulic nut assembly has an annular oil chamber inside. By injecting high-pressure oil into the oil chamber through an external hydraulic system, the nut body can be pushed to extend axially, thereby driving the third pressure plate 203 to move. At the same time, the pressure sensor built into the hydraulic nut assembly can provide real-time feedback of the output pressure, forming dual monitoring with the load data of the detection component 303. This avoids detection errors caused by the failure of a single sensor. Furthermore, the hydraulic drive method has no mechanical wear, resulting in a longer service life and lower maintenance costs, making it particularly suitable for long-term continuous detection operations.

[0045] like Figure 1 As shown, in an optional embodiment, the end of the pull rod 302 is provided with a threaded fastening nut 406, and the fastening nut 406 is pressed against the end face of the third pressure plate 203 away from the second pressure plate 202.

[0046] In an optional embodiment, to further enhance the connection reliability between the pull rod 302 and the third pressure plate 203 and prevent the pull rod 302 from loosening due to vibration during the testing process, an external thread is machined at the end of the pull rod 302 that penetrates the third pressure plate 203, and a fastening nut 406 is provided accordingly. The fastening nut 406 is threadedly engaged with the pull rod 302. After the fastening nut 406 is tightened, the end face of the fastening nut 406 is tightly pressed against the end face of the third pressure plate 203 away from the second pressure plate 202. By applying a preset preload, a rigid connection is formed between the pull rod 302 and the third pressure plate 203, effectively eliminating thread clearance. At the same time, an elastic washer can be added between the fastening nut 406 and the third pressure plate 203. The elastic deformation of the washer compensates for thread loosening caused by temperature changes or load fluctuations during the testing process, further improving the long-term stability of the connection and preventing the accuracy of the test data from being affected by the loosening of the pull rod 302.

[0047] like Figure 1 as well as Figure 2 As shown, Figure 2 This is a schematic diagram of the slewing bearing device provided in this application assembly mounted on a mounting frame. In an optional embodiment, the vertical detection system further includes a mounting frame 600, which includes a top plate 601 for fixing the mounting position of the first pressure plate 201, and a side plate 602 for fixing the upper slewing outer ring 102 of the slewing bearing device 100. The side plate 602 is provided with a brake caliper 603 for engaging with the brake disc 103.

[0048] In an optional implementation, to simulate the assembly environment of the slewing bearing in an actual vehicle chassis, the testing system adds a mounting bracket 600. The mounting bracket 600 can be a welded steel structure with sufficient rigidity. The top plate 601 of the mounting bracket 600 serves as the fixing base for the first pressure plate 201. The top plate 601 is machined with mounting positions corresponding to the bolt holes of the first pressure plate 201. The first pressure plate 201 is rigidly connected to the top plate 601 by high-strength bolts, ensuring that the first pressure plate 201 does not shift during the testing process. The side plate 602 of the mounting bracket 600 is used to fix the upper slewing outer ring 102 of the slewing bearing device 100. The side plate 602 also has a reserved mounting interface for the brake caliper 603. According to the actual testing requirements, a brake caliper 603 consistent with the vehicle chassis can be installed to achieve simulated testing of combined vertical load and braking conditions. Compared with single vertical load testing, it can more realistically reflect the stress state of the slewing bearing during vehicle braking, and the test results are more valuable.

[0049] like Figure 1 as well as Figure 2As shown, in an optional embodiment, a fixing seat 604 is fixedly provided on the side plate 602. The fixing seat 604 is used to fixally connect the upper slewing outer ring 102, and at least two brake calipers 603 are provided. To improve the connection stability between the upper slewing outer ring 102 and the side plate 602 of the mounting bracket 600, the fixing seat 604 is fixedly welded to the side plate 602. The number of brake calipers 603 is set to at least two, and they are symmetrically distributed along the circumference of the brake disc 103. This can make the braking force on the brake disc 103 uniform, avoid the brake disc 103 swaying due to unilateral braking, and thus prevent the slewing bearing from bearing additional overturning moment. This ensures that the vertical load detection data is not affected by the braking condition, and at the same time, it can simulate the scenario of multiple calipers working together when the vehicle is actually braking, further expanding the working condition coverage of the detection system.

[0050] like Figure 1 as well as Figure 2 As shown, based on the same inventive concept, this application also provides a vertical detection method for a slewing bearing device 100, the vertical detection method being applied to the vertical detection system described above, the vertical detection method comprising: The first pressure plate 201 is fixedly connected to the top plate 601, the second pressure plate 202 is fixedly connected to the brake disc 103, and the brake disc 103 is assembled to cooperate with the brake caliper 603; Take the slewing bearing device 100 to be tested, fix the first pressure plate 201 to the upper slewing inner ring 101, and fix the second pressure plate 202 to the lower slewing outer ring 103; The first driving component 301 is operated to drive the third pressure plate 203 to move away from the second pressure plate 202; The axial load applied to the slewing bearing device 100 is detected by the detection element 303; The first driving component 301 is controlled to output different driving forces, and the reliability data of the slewing bearing device 100 is detected and obtained. The upper slewing outer ring 102 of the slewing bearing device 100 is fixedly connected to the side plate 602. The slewing bearing device 100 is operated, and the lower slewing outer ring 103 is driven to rotate. The brake caliper 603 is operated to clamp the brake disc 103, and the rotational resistance torque of the brake caliper 603 is detected and recorded to obtain the rotational smoothness data of the slewing bearing device 100.

[0051] This vertical detection method, through phased and strongly correlated operation steps, deeply integrates the system structure and function with the detection requirements, ensuring both the operability and data reliability of the detection process, and specifically addressing the problems of single detection scenarios, incomplete data dimensions, and low operation efficiency in existing technologies.

[0052] Before conducting the test, the basic assembly and fixation are first carried out. The first pressure plate 201 is fixed with the top plate 601 of the mounting bracket 600 as the reference. The mounting position of the top plate 601 is aligned with the bolt holes of the first pressure plate 201 and connected with bolts to ensure that the first pressure plate 201 and the top plate 601 are rigidly connected and without loosening. At the same time, the second pressure plate 202 is fixed to the brake disc 103. The assembled brake disc 103 and the second pressure plate 202 assembly are adjusted according to the gap between the outer circle of the brake disc 103 and the caliper jaw of the brake caliper 603, so that the brake disc 103 is just embedded in the clamping area of ​​the brake caliper 603, thus completing the initial adaptation of the braking system and the pressure plate assembly.

[0053] The upper slewing inner ring 101 of the slewing bearing device 100 is fixed to the first pressure plate 201; then the lower slewing outer ring 103 is fixed to the second pressure plate 202. At this time, the inner ring of the slewing bearing is fixed with the first pressure plate 201, and the outer ring is movable with the second pressure plate 202, which completely simulates its assembly relationship in the actual vehicle corner module and avoids the distortion of test data due to installation deviation.

[0054] Entering the load loading and reliability testing stage, the first driving component 301 drives the third pressure plate 203 to move. When the first driving component 301 is configured as a hydraulic nut assembly, the hydraulic system pressurizes and pushes the nut body to drive the third pressure plate 203 to move. During this process, the tie rod 302 moves synchronously with the third pressure plate 203. The axial load applied to the slewing bearing is collected in real time by the detection component 303. The collected load data is transmitted to the data acquisition system in real time through the shielded data line. The system automatically filters out instantaneous fluctuations to ensure data accuracy.

[0055] To obtain reliability data of the slewing bearing under different loads, the output driving force of the first driving component 301 is adjusted in stages by the control system. Based on the rated axial load of the slewing bearing, the load is increased in increments of 10% of the rated load to cover the conventional load and ultimate load in actual working conditions. The load is maintained under each load gradient. During this period, the data acquisition system continuously records the load stability value and the relative displacement between the inner and outer rings of the slewing bearing. At the same time, the system manually observes for abnormal phenomena such as abnormal noises and oil leaks. If a sudden change in displacement or abnormal sound occurs under a certain load gradient, the load is determined to be the ultimate reliable load of the slewing bearing. Finally, a reliability data curve is generated, which solves the problem that existing technologies cannot continuously obtain reliability data under multiple load conditions.

[0056] After completing the static load reliability test, the dynamic rotation smoothness test is then performed. First, the upper slewing outer ring 102 of the slewing bearing device 100 is fixed by the fixing seat 604 on the side plate 602 of the mounting bracket 600. At this time, the upper slewing outer ring 102 is fixed with the side plate 602, and the lower slewing outer ring 103 can rotate freely. Then, the drive motor meshing with the gear ring of the lower outer ring is started, driving the lower slewing outer ring 103 to drive the second pressure plate 202 and the brake disc 103 to rotate synchronously. During the rotation, the speed stability is monitored in real time by the speed sensor to ensure a smooth rotation.

[0057] After the rotational speed stabilizes, the brake caliper 603 is operated to gradually apply clamping force. The rotational resistance torque generated when the brake caliper 603 clamps the brake disc 103 is detected in real time by a torque sensor connected to the lower-level rotating outer ring 103. The data acquisition system records the resistance torque values ​​and fluctuation ranges under different clamping forces and different axial loads, and finally generates a smoothness data report, filling the gap in the existing technology of lacking rotational smoothness testing under compound working conditions.

[0058] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of the invention.

[0059] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0060] It should be understood that in the description of this invention, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship as commonly placed when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention.

[0061] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0062] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0063] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0064] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0065] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. A vertical detection system for a slewing bearing device, characterized in that, The vertical detection system includes: A first pressure plate and a second pressure plate are arranged at intervals. The first pressure plate is used to connect to the upper inner ring of the slewing bearing device, and the second pressure plate is used to connect to the lower outer ring of the slewing bearing device and the brake disc. The third pressure plate is arranged at intervals on the side of the second pressure plate away from the first pressure plate, and a first driving member is provided between the third pressure plate and the second pressure plate. The first driving member can drive the third pressure plate to move away from the second pressure plate. A tie rod extends axially through the first pressure plate and the second pressure plate of the slewing bearing device and is connected to the third pressure plate. A detection element is provided at one end of the tie rod extending to the upper part of the first pressure plate. The detection element is arranged on the side of the first pressure plate away from the slewing bearing device so that when the first drive member drives the third pressure plate to move, the detection element can detect the axial load applied to the slewing bearing device.

2. The vertical detection system for the slewing bearing device as described in claim 1, characterized in that: A thrust ball bearing is provided between the first pressure plate and the detection piece. A recessed groove is provided on the end face of the first pressure plate, and the thrust ball bearing is engaged in the recessed groove.

3. The vertical detection system for the slewing bearing device as described in claim 2, characterized in that: A mounting base is provided between the thrust ball bearing and the detection element. The mounting base, the thrust ball bearing, and the tie rod are arranged coaxially. The detection end of the detection element abuts against the end face of the mounting base.

4. The vertical detection system for the slewing bearing device as described in claim 3, characterized in that: The mounting base is provided with a receiving groove, the end of the pull rod extends into the receiving groove, and the detection element is detachably connected to the pull rod through a mounting block arranged in the receiving groove.

5. The vertical detection system for the slewing bearing device as described in claim 1, characterized in that: A positioning cylinder is provided between the second pressure plate and the third pressure plate. The positioning cylinder is connected to the second pressure plate, and the third pressure plate is provided with a boss that cooperates with the positioning cylinder. The first driving component is sleeved on the positioning cylinder.

6. The vertical detection system for the slewing bearing device as described in claim 1, characterized in that: The first driving component is a hydraulic nut assembly.

7. The vertical detection system for the slewing bearing device as described in claim 1, characterized in that: The end of the pull rod away from the detection element is provided with a threaded fastening nut, which is pressed onto the end face of the third pressure plate away from the second pressure plate.

8. The vertical detection system for the slewing bearing device as described in claim 1, characterized in that: The vertical detection system also includes a mounting frame, which includes a top plate for fixing the mounting position of the first pressure plate and a side plate for fixing the upper slewing outer ring of the slewing bearing device. The side plate is provided with a brake caliper for engaging with the brake disc.

9. The vertical detection system for the slewing bearing device as described in claim 8, characterized in that: A fixing seat is fixedly provided on the side plate, and the fixing seat is used to fix the upper rotating outer ring. At least two brake calipers are provided.

10. A method for detecting the verticality of a slewing bearing device, characterized in that, The vertical detection method is applied to the vertical detection system as described in claim 8 or 9, and the vertical detection method includes: Connect the first pressure plate to the top plate, connect the second pressure plate to the brake disc, and assemble the brake disc to cooperate with the brake caliper; Take the slewing bearing device to be tested, connect the first pressure plate to the upper slewing inner ring, and connect the second pressure plate to the lower slewing outer ring; The first driving component is operated to drive the third pressure plate to move away from the second pressure plate; The axial load applied to the slewing bearing device is detected by the detection component. Control the first driving component to output different driving forces, and detect and obtain the reliability data of the slewing bearing device; Connect the upper slewing outer ring of the slewing bearing device to the side plate, operate the slewing bearing device, and drive the lower slewing outer ring to rotate; The brake caliper is operated to clamp the brake disc, and the rotational resistance torque of the brake caliper is detected and recorded to obtain the rotational smoothness data of the slewing bearing device.

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