Crane slewing bearing test fixture

Abstract

The present invention discloses a crane slewing bearing test fixture, comprising a base and a frame plate mounted on the base, a support plate horizontally provided on the frame plate, fixture seats provided at both ends of the support plate, a core shaft movably provided between the two fixture seats, a fixture sleeve provided on the core shaft, a mounting cavity formed between the fixture sleeve and the core shaft, a first loading member provided on the base for applying a radial loading force to the fixture sleeve, and an adjustment control for cooperating with the first loading member to change the loading direction of the first loading member, a second loading member provided on the frame plate for applying a radial loading force to the fixture sleeve, and a driving member provided on the support plate for driving the core shaft to operate to simulate the actual operating conditions of the bearing. The present invention solves the problems of conventional crane slewing bearing test fixtures in that they have a single test loading direction, are difficult to simulate the actual operating conditions of the bearing, and lack the ability to simulate the different directional load conditions to which the bearing is subjected during actual operation.

Description

Technical Field

[0001] The invention relates to the technical field of crane bearing test devices, in particular to a crane slewing support bearing test fixture. Background Art

[0002] Cranes are critical equipment for construction and material handling. Their slewing bearings bear the weight of the crane's superstructure and the weight of the loads they lift. They also must withstand complex radial and axial loads and overturning moments, directly impacting the crane's operational safety and reliability. Currently, conventional crane slewing bearing test fixtures have numerous shortcomings during testing. First, the test loading direction is relatively limited, and most can only apply radial loads in a fixed direction to the bearings. This makes it difficult to simulate the diverse load conditions experienced by the bearings during actual operation due to the crane's varying operating conditions (such as lifting, slewing, and luffing). For example, when a crane slews, the direction of the radial load on the bearings changes with the slewing angle, and conventional fixtures are unable to effectively simulate this dynamic process. Second, conventional fixtures often struggle to fully simulate the bearing's actual operating conditions. In actual operation, bearings simultaneously bear the weight of the superstructure and the loads of the lift, and the loading directions and modes of these loads differ. Conventional fixtures can typically only simulate one of these load conditions, resulting in discrepancies between test results and actual operation, making it impossible to accurately assess bearing performance under complex operating conditions. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a crane slewing bearing test fixture to solve the problems of the traditional crane slewing bearing test fixture having a single test loading direction, difficulty in simulating the actual operating conditions of the bearing, and lack of simulation of the load loading conditions in different directions that the bearing is subjected to during actual operation.

[0004] To achieve the above-mentioned objectives, the present invention provides a crane slewing bearing test fixture, comprising a base and a frame plate set on the base, wherein a support plate is horizontally opened on the frame plate, and tooling seats are set at both ends of the support plate, a core shaft is movably set between the two tooling seats, a tooling sleeve is sleeved on the core shaft, and an installation cavity for installing a slewing bearing to be tested from the outside is formed between the inner peripheral wall of the axial hole of the tooling sleeve and the outer peripheral wall of the core shaft, the base is provided with a first loading member for applying a radial loading force to the tooling sleeve to simulate the weight load condition applied by the lifting weight during the actual operation of the bearing, and an adjustment control unit for cooperating with the first loading member to change the loading direction of the first loading member to simulate the weight load condition of different directions to which the bearing is actually subjected during operation, the frame plate is provided with a second loading member for applying a radial loading force to the tooling sleeve to simulate the deadweight load condition of the crane superstructure to which the bearing is actually subjected during operation, and the support plate is provided with a driving member for driving the core shaft to operate to simulate the actual operating condition of the bearing.

[0005] The benefits of adopting the above technical solution are: in the above technology, a stable load-bearing platform is formed by basic components such as the base, frame plate, and support plate, and the installation cavity between the core shaft and the tooling sleeve provides a precise installation and positioning space for the bearing to be tested. Through the coordinated design of the first loading member and the adjustment control, dynamic direction simulation can be performed for the weight load of the lifted object, which solves the defect of the fixed loading direction of the traditional tooling, and can truly restore the directional load conditions borne by the bearing of the crane under different operating postures (such as rotation and luffing); the second loading member is independently arranged on the frame plate, specifically simulating the deadweight load of the crane superstructure, forming a dual-load source collaborative loading system with the first loading member, so that the bearing is subjected to two types of typical radial loads at the same time during the test, greatly improving the comprehensiveness of the working condition simulation; at the same time, the drive member acts directly on the core shaft, which can accurately control the operating speed and rotation trajectory of the bearing, and cooperate with the loading system to realize the "load-speed" coupled working condition simulation, effectively solving the problem that traditional tooling is difficult to simulate the dynamic load and operating state in actual operation.

[0006] The present invention is further provided with: a transmission shaft movably provided at the bottom of the tooling sleeve, a movable groove for the transmission shaft to pass through to a position above the base is passed through the position corresponding to the tooling sleeve on the support plate, and the first loading component includes a first loading cylinder movably provided on the base, the output end of the first loading cylinder is arranged toward the bottom wall of the support plate and the output end of the first loading cylinder is coaxially connected to the transmission shaft.

[0007] The benefits of adopting the above technical solution are: in the above technology, a transmission shaft is added to the bottom of the tooling sleeve, and is coaxially connected to the first loading cylinder above the base through a movable groove, thereby constructing a vertical load transfer channel. The transmission shaft serves as a force transmission hub, directly transmitting the radial force of the first loading cylinder to the tooling sleeve, avoiding the force loss or direction deviation problems that may occur in traditional indirect loading methods, and ensuring the simulation accuracy of lifting heavy loads. The design of the movable groove provides axial freedom of movement for the transmission shaft. The coaxial setting of the first loading cylinder and the transmission shaft ensures that the load action line always passes through the central axis of the bearing, ensuring the uniform application of the radial load and avoiding the interference of eccentric load on the test results.

[0008] The present invention is further provided with: a transmission slide rail is provided on the base, the radial cross-section of the transmission slide rail is arc-shaped, the two ends of the transmission slide rail are arranged near the bottom wall of the support plate, and the first loading cylinder is movably arranged on the transmission slide rail along the arc direction of the transmission slide rail through an adjustment control.

[0009] The benefits of adopting the above technical solution are: the arc-shaped cross-section design of the transmission slide rail in the above technology is the key innovation for simulating changing directional loads. The layout of its two ends close to the bottom wall of the support plate makes the motion trajectory of the first loading cylinder match the load direction change trajectory when the bearing is actually loaded. The arc-shaped slide rail provides a motion guide for the loading cylinder in the circumferential direction, allowing the load action direction to be continuously adjusted within a fan-shaped range, and can accurately simulate the follow-up radial load borne by the bearing during the rotation of the crane. Compared with traditional linear slide rails that can only achieve load adjustment in a single direction or a limited angle, the application of the arc-shaped slide rail breaks through the limitation of the loading direction, so that the test fixture can cover all radial load directions that the bearing may encounter in actual operation.

[0010] The present invention further provides: the transmission slide rail is provided with a transmission groove along its arc direction, and the transmission groove is arranged through the width direction of the transmission slide rail, and the adjustment control unit includes a transmission plate, and connecting plates are extended toward the base on both sides of the transmission plate, and the two connecting plates are respectively arranged on both sides of the transmission slide rail, and the two connecting plates are each provided with a linkage shaft extending toward the transmission groove, the two linkage shafts are coaxially arranged and a coupling sleeve is connected between the two linkage shafts, and the two connecting plates are each provided with a driving motor for driving adjacent linkage shafts to rotate axially, and the adjustment control unit also includes two transmission gears, and the two transmission gears are respectively arranged on the two linkage shafts, and the inner circumferential wall of the transmission groove is provided with transmission tooth grooves corresponding to the positions of the two linkage shafts, and the two transmission gears are both meshed with their respective corresponding transmission tooth grooves, and the first loading cylinder is arranged on the top wall of the transmission plate and the bottom wall of the transmission plate is clearance-matched with the top wall of the transmission slide rail.

[0011] The advantages of adopting the above technical solution are: the control unit in the above technology adopts a drive method in which the transmission gear and transmission tooth groove engage. The drive motor drives the transmission shaft to rotate, and the meshing principle of the gear rack is used to convert the rotational motion into the linear motion of the transmission plate along the curved slide rail, thereby achieving precise control of the position of the first loading cylinder. This transmission method has the advantages of high transmission efficiency, accurate positioning accuracy, smooth and impact-free motion, and avoids the clearance error or slippage problems that may occur in traditional screw-nut transmission or belt transmission. It ensures position accuracy when the load direction changes. The symmetrical arrangement of the drive motors on both sides forms a dual-power drive system, which improves the stability of the transmission plate movement and prevents tilting or sticking caused by unilateral force. At the same time, the coupling sleeve connects the drive shafts at both ends, ensuring the synchronization of power transmission, so that the motion trajectory of the transmission plate on the curved slide rail strictly conforms to the designed curvature. This control system combines automated control with precision mechanical transmission to achieve intelligent and precise operation of loading direction changes, providing a reliable motion control platform for dynamic load simulation, effectively solving the problems of low efficiency and poor accuracy of manual loading direction adjustment in traditional tooling, and significantly improving the controllability and data repeatability of the test process.

[0012] The present invention is further provided with: a supporting roller is rotatably provided on the coupling sleeve, a rolling track for the supporting roller is provided on the inner peripheral wall of the transmission groove, two limit shafts are relatively provided on the bottom wall of the transmission plate, and two limit grooves are provided on the top wall of the transmission slide rail along the curvature direction of the transmission slide rail, the two limit shafts correspond to the two limit grooves one by one and are plug-fitted, the ends of the two limit shafts are connected with an arc plate, the arc plate is movably arranged in the limit groove and the bottom wall of the arc plate is affixed with a wear-resistant pad for increasing the friction resistance between the arc plate and the limit groove, the wear-resistant pad is made of rubber material, and the bottom wall of the transmission plate is provided with an electric push rod for driving the limit shaft to move so that the wear-resistant pad contacts or separates with the bottom wall of the limit groove corresponding to the positions of the two limit shafts.

[0013] The benefits of adopting the above technical solution are: the matching design of the supporting roller and the raceway in the above technology converts the sliding friction between the transmission plate and the slide rail into rolling friction, which significantly reduces the resistance during the movement of the adjustment control, improves the transmission efficiency, reduces mechanical wear, and extends the service life of the equipment. The plug-in structure of the limit shaft and the limit groove combined with the arc plate and the wear-resistant pad provides a reliable braking function when positioning the loading cylinder: the electric push rod drives the limit shaft to make the wear-resistant pad contact with the bottom wall of the limit groove, and uses the high friction characteristics of the rubber material to lock the position of the transmission plate to prevent displacement caused by vibration or load reaction force during loading. Deviation; when the direction needs to be adjusted, the electric push rod retracts to separate the wear-resistant pad, releases the braking state, and ensures that the transmission plate can move flexibly. The "rolling-braking" composite structure design ensures the flexibility of the adjustment control while effectively improving the anti-interference ability and positioning stability of the loading system, and solves the problem of loading position drift caused by mechanical vibration during load application of traditional tooling. The arc matching design of the arc plate and the limit groove makes the braking force evenly distributed, avoids local stress concentration, further enhances the reliability of the structure, and provides a stable mechanical support environment for high-precision load simulation.

[0014] The present invention further provides: a rotating groove is opened on the base, a turntable is rotatably arranged in the rotating groove, the transmission slide rail is arranged on the turntable and a plurality of support columns are connected between the transmission slide rail and the turntable, and a servo motor for driving the turntable to rotate is arranged in the base.

[0015] The benefits of adopting the above technical solution are: the setting of the turntable and servo motor in the above technology constructs an omnidirectional rotating platform for the loading system, and the transmission slide is fixed to the turntable through the support column, so that the motion range of the first loading cylinder is extended from the local circumference of the arc slide to the entire horizontal plane 360° rotation. The high-precision angle control function of the servo motor can accurately adjust the rotation angle of the turntable, and cooperate with the position adjustment of the loading cylinder on the transmission slide to realize two-dimensional dynamic adjustment of the radial load in the horizontal and circumferential directions. This design breaks through the limitation that a single arc slide can only adjust the load direction within a fixed plane, and can simulate the spatial directional load borne by the bearing of the crane in complex operating scenarios (such as multi-angle lifting and compound motion). The rigid connection of the support column ensures the stability of the load transfer between the turntable and the slide, avoiding structural deformation or vibration during rotation.

[0016] The present invention is further provided with: a tooling plate is provided on the bottom wall of the tooling sleeve, a tooling groove is provided on the bottom wall of the tooling plate, a matching disk is rotatably provided in the tooling groove, the bottom wall of the matching disk is hingedly matched with the starting end of the transmission shaft, an anti-slip groove is provided in an annular direction on the inner circumferential wall of the tooling groove, an anti-slip ring is provided in an annular direction on the outer circumferential wall of the matching disk, and the anti-slip ring is snap-fitted with the anti-slip groove.

[0017] The benefits of adopting the above technical solution are: the hinged structure design of the tooling plate and the matching disk in the above technology provides a flexible connection interface between the tooling sleeve and the drive shaft, so as to avoid jamming or damage due to the angle factor between the drive shaft and the tooling sleeve when the drive shaft transmits the load; the clamping setting of the anti-slip groove and the anti-slip ring in the above technology ensures the free rotation of the matching disk while effectively preventing the tooling sleeve from being separated from the drive shaft during high-speed operation or drastic load changes, thereby ensuring the continuity and reliability of the force transmission path. The rotational freedom of the matching disk enables the tooling sleeve to better adapt to the combined load of the first loader and the second loader, avoiding stress concentration problems caused by rigid connection.

[0018] The present invention is further provided with: a top plate is horizontally opened on the top of the frame plate, the top plate is arranged relatively parallel to the support plate, the second loading component includes a plurality of second loading cylinders arranged on the top wall of the top plate and a transmission disk located below the top plate, the output ends of the plurality of second loading cylinders are all passed through the top plate and are arranged toward the tooling sleeve, the output ends of the plurality of second loading cylinders are all connected to the transmission disk, and the transmission disk is transmission-connected to the top wall of the tooling sleeve with a loading shaft.

[0019] The benefits of adopting the above technical solution are: in the above technology, the second loading member adopts multiple second loading cylinders to apply radial load to the top wall of the tooling sleeve through the transmission disk and the loading shaft. This multi-point uniform loading method can accurately simulate the distribution characteristics of the deadweight load of the crane superstructure. Through the coordinated work of multiple loading cylinders, the load size can be adjusted according to the deadweight parameters of different crane models. The load is applied in stages through the control system, which improves the flexibility and adaptability of the deadweight load simulation. The transmission disk serves as a load distribution mechanism, which gathers the forces of each loading cylinder and evenly transmits them to the loading shaft, ensuring that the load on the top of the tooling sleeve is evenly distributed, avoiding the influence of local overload on the bearing test results, and the transmission connection design between the loading shaft and the tooling sleeve enables the deadweight load to be transmitted vertically along the bearing axis, forming an orthogonal loading system with the radial load of the first loading member, and truly restoring the complex working conditions of the bearing in actual operation where it simultaneously bears the deadweight of the superstructure and the load of the hoisted heavy objects.

[0020] The present invention further provides that: the driving component includes a high-frequency motor arranged on the support plate, and the output end of the high-frequency motor is coaxially connected to the core shaft.

[0021] The benefit of adopting the above technical solution is that the high-frequency motor in the above technology is directly coaxially connected to the core shaft as a driving component, which can provide a stable and adjustable speed output to meet the speed simulation requirements of different types of bearings in actual operation.

[0022] The present invention further provides that: a tooling hole for the core shaft to pass through is opened on the tooling seat, and a test bearing is transmission-connected between the tooling hole and the core shaft.

[0023] The benefits of adopting the above technical solution are: in the above technology, the test bearing is arranged between the tooling hole and the core shaft, which plays a supporting role during the operation of the core shaft, effectively reduces the direct friction between the core shaft and the tooling seat, reduces the mechanical loss during the test, and extends the service life of the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional view of the present invention;

[0025] Figure 2 A partial three-dimensional view of the transmission slide rail and its linkage structure in the present invention;

[0026] Figure 3 A three-dimensional view of the coordinated state of the transmission rail, the transmission plate, and their linkage structure in the present invention;

[0027] Figure 4 A three-dimensional view of the fitting seat, the core shaft and the second loading member in the present invention;

[0028] Figure 5 for Figure 4 sectional view of

[0029] Figure 6 It is a simplified side view of the matching state of the limiting shaft and the arc plate in the present invention. DETAILED DESCRIPTION

[0030] The present invention provides a crane slewing bearing test fixture, comprising a base 1 and a frame plate 11 set up on the base 1, a support plate 12 is horizontally opened on the frame plate 11, and tooling seats 13 are set at both ends of the support plate 12, a core shaft 14 is movably set between the two tooling seats 13, a tooling sleeve 2 is sleeved on the core shaft 14, and an installation cavity for installing the slewing bearing to be tested by the outside world is formed between the inner peripheral wall of the shaft hole of the tooling sleeve 2 and the outer peripheral wall of the core shaft 14, and the base 1 is provided with a first loading member for applying a radial loading force to the tooling sleeve 2 to simulate the weight load condition applied by the lifting weight when the bearing is actually running, and a loading member for cooperating with the first loading member to change the loading direction of the first loading member to simulate the actual operation of the bearing The frame plate 11 is provided with a second loading component for applying a radial loading force to the tooling sleeve 2 to simulate the deadweight load condition of the crane superstructure subjected to the actual operation of the bearing. The support plate 12 is provided with a driving component for driving the core shaft 14 to operate to simulate the actual operating condition of the bearing. A transmission shaft 21 is movably provided at the bottom of the tooling sleeve 2. A movable groove 121 for the transmission shaft 21 to pass through the position corresponding to the tooling sleeve 2 on the support plate 12 is penetrated to the position above the base 1. The first loading component includes a first loading cylinder 22 movably provided on the base 1. The output end of the first loading cylinder 22 is arranged toward the bottom wall of the support plate 12 and the output end of the first loading cylinder 22 is connected to the transmission shaft 2. 1 is coaxially connected, and a transmission slide rail 3 is provided on the base 1. The radial cross-section of the transmission slide rail 3 is arc-shaped. The two ends of the transmission slide rail 3 are arranged near the bottom wall of the support plate 12. The first loading cylinder 22 is movably arranged on the transmission slide rail 3 along the arc direction of the transmission slide rail 3 through the adjustment control. The transmission slide rail 3 is provided with a transmission groove 31 along its arc direction. The transmission groove 31 is arranged through the wide diameter direction of the transmission slide rail 3. The adjustment control includes a transmission plate 4. Both sides of the transmission plate 4 extend with connecting plates 41 toward the base 1. The two connecting plates 41 are respectively arranged on both sides of the transmission slide rail 3. The two connecting plates 41 extend with linkage shafts 43 toward the transmission groove 31. The two linkage shafts 43 are coaxially arranged and the two linkage shafts 4 3 is connected with a coupling sleeve 44, and the two connecting plates 41 are each provided with a driving motor 42 for driving the adjacent linkage shafts 43 to rotate axially. The adjustment control unit also includes two transmission gears 431, and the two transmission gears 431 are respectively arranged on the two linkage shafts 43. The inner circumferential wall of the transmission groove 31 corresponds to the position of the two linkage shafts 43 and is provided with a transmission tooth groove 311. The two transmission gears 431 are meshed with their respective corresponding transmission tooth grooves 311. The first loading cylinder 22 is provided on the top wall of the transmission plate 4 and the bottom wall of the transmission plate 4 is provided with a clearance fit with the top wall of the transmission slide rail 3. A support roller 441 is rotatably provided on the coupling sleeve 44, and a raceway 312 for the support roller 441 to roll is provided on the inner circumferential wall of the transmission groove 31.The bottom wall of the transmission plate 4 is relatively provided with two limiting shafts 45, and the top wall of the transmission slide rail 3 is provided with two limiting grooves 32 along the curvature direction of the transmission slide rail 3. The two limiting shafts 45 correspond to the two limiting grooves 32 one by one and are plugged together. The ends of the two limiting shafts 45 are connected with an arc plate 451, and the arc plate 451 is movably set in the limiting groove 32. The bottom wall of the arc plate 451 is affixed with a wear-resistant pad for increasing the friction resistance between the arc plate 451 and the limiting groove 32. The wear-resistant pad is made of rubber material. The bottom wall of the transmission plate 4 corresponds to the two limiting grooves 32. The position of the limiting shaft 45 is provided with an electric push rod 46 for driving the limiting shaft 45 to move so that the wear-resistant pad contacts or separates from the bottom wall of the limiting groove 32. The base 1 is provided with a rotating groove 15, and a turntable 151 is rotatably provided in the rotating groove 15. The transmission slide 3 is provided on the turntable 151 and a number of support columns 33 are connected between the transmission slide 3 and the turntable 151. The base 1 is provided with a servo motor 152 for driving the turntable 151 to rotate. The bottom wall of the tooling sleeve 2 is provided with a tooling plate 23, and the bottom wall of the tooling plate 23 is provided with a tooling groove 231 , a matching disk 232 is rotatably provided in the tooling slot 231, the bottom wall of the matching disk 232 is hingedly matched with the starting end of the transmission shaft 21, the inner peripheral wall of the tooling slot 231 is circumferentially provided with an anti-slip groove 233, and the outer peripheral wall of the matching disk 232 is circumferentially provided with an anti-slip ring 234, the anti-slip ring 234 is snap-fitted with the anti-slip groove 233, the top of the frame plate 11 is horizontally provided with a top plate 16, the top plate 16 is relatively parallel to the support plate 12, the second loading member includes a plurality of second loading cylinders 5 arranged on the top wall of the top plate 16 and a plurality of second loading cylinders 5 located below the top plate 16 The output ends of the second loading cylinders 5 are all connected to the transmission disc 51, and the output ends of the second loading cylinders 5 are all passed through the top plate 16 and are arranged toward the tooling sleeve 2. The output ends of the second loading cylinders 5 are all connected to the transmission disc 51. The transmission disc 51 is in driving connection with the top wall of the tooling sleeve 2 via a loading shaft 52. The driving member includes a high-frequency motor 6 disposed on the support plate 12. The output end of the high-frequency motor 6 is coaxially connected to the core shaft 14. The tooling seat 13 is provided with a tooling hole 131 for the core shaft 14 to pass through. A test bearing 132 is in driving connection between the tooling hole 131 and the core shaft 14.

[0031] Specific operation process:

[0032] 1. Install the slewing bearing to be tested in the installation cavity between the tooling sleeve and the core shaft. Use the traditional positioning structure to ensure the accurate axial and radial position of the bearing. Connect the two ends of the core shaft to the tooling seat through the accompanying test bearings to form a stable rotation support system.

[0033] 2. Start the second loading device, and multiple second loading cylinders on the top plate extend synchronously, applying the deadweight load evenly to the top wall of the tooling sleeve through the transmission plate and loading shaft, simulating the radial load of the crane superstructure on the bearing;

[0034] 3. According to the test working condition settings, the first loading cylinder applies the weight load of the lifting object to the tooling sleeve through the transmission shaft; when the load direction needs to be changed, the servo motor drives the turntable to rotate to the target direction. At the same time, the drive motor drives the transmission gear of the adjustment control to rotate in the transmission tooth groove, so that the transmission plate moves along the arc slide rail to adjust the radial position of the first loading cylinder to achieve precise adjustment of the load direction. Under the control of the electric push rod, the limit shaft releases the brake during load adjustment (the wear-resistant pad is separated) and locks during positioning (the wear-resistant pad contacts the limit groove) to ensure a stable loading position;

[0035] 4. The high-frequency motor drives the core shaft to run at the set speed, driving the bearing to be tested to rotate synchronously, simulating the speed conditions in actual operation of the crane, and cooperating with the loading system to achieve "load-speed" coupled simulation;

[0036] 5. The first loading part and the second loading part work together to simulate the lifting load and the deadweight load of the upper structure respectively. The turntable and the transmission slide rail cooperate to realize omnidirectional load application. The supporting rollers and anti-slip structure ensure the stability and safety of the mechanical movement.

[0037] 6. During the test, the temperature rise, vibration, load feedback and other parameters of the bearing are monitored in real time. The test conditions are adjusted according to the real-time status of the control components and drive parts. After completion, the loading and driving are stopped, the bearing is disassembled and the test data is analyzed to evaluate its performance under the simulated conditions.

[0038] In order to improve the test accuracy during the test process, the above technology can be provided with a temperature rise detection sensor, a vibration sensor, and a load sensor at the output end of the first loading cylinder and the output end of the second loading cylinder. A force sensor can also be provided at the connection between the tooling sleeve and the transmission shaft. Test data detection is achieved according to different sensors. The above sensors are all existing technologies, so their structure and function will not be described in detail.

[0039] The motors, first loading cylinder, second loading cylinder and electric push rod in the above technology are all existing technologies, so their structures and functions will not be described in detail. At the same time, a control module can be set according to actual needs, that is, an intelligent industrial computer to realize the control of multiple electronic components. The control module is existing technology, so the communication connection method between the motors, first loading cylinder, second loading cylinder, electric push rod and the control module will not be described in detail.

[0040] The bearing to be tested in the above technology is marked as 7 in the accompanying drawings of the specification. At the same time, the bearing to be tested in the accompanying drawings of the specification is only used for position reference, and no corresponding limitation is made on its structure, size and shape.

[0041] The various components in the drawings in the above description are for illustration and reference only, and do not limit the structure, size and shape, which can be adjusted based on actual operating requirements.

[0042] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A crane slewing bearing test fixture, characterized by: The invention comprises a base and a frame plate set up on the base, a support plate is horizontally provided on the frame plate, tooling seats are provided at both ends of the support plate, a core shaft is movably provided between the two tooling seats, a tooling sleeve is sleeved on the core shaft, and an installation cavity for installing a slewing bearing to be tested by the outside world is formed between the inner peripheral wall of the shaft hole of the tooling sleeve and the outer peripheral wall of the core shaft, a first loading part for applying a radial loading force to the tooling sleeve to simulate the weight load condition of the lifting weight applied to the bearing during actual operation and a first loading part for cooperating with the first loading part to change the loading direction of the first loading part to simulate the bearing The adjusting control unit is used for the weight load loading conditions in different directions during actual operation. The frame plate is provided with a second loading member for applying a radial loading force to the tooling sleeve to simulate the deadweight load condition of the crane superstructure subjected to the actual operation of the bearing. The support plate is provided with a driving member for driving the core shaft to operate to simulate the actual operating condition of the bearing. A transmission shaft is movably provided at the bottom of the tooling sleeve. A movable groove for the transmission shaft to pass through the position of the tooling sleeve corresponding to the support plate is penetrated to the position above the base. The first loading member includes a first loading cylinder movably provided on the base, and the output end of the first loading cylinder is directed toward The cam is provided with a first end for sliding the transmission rail and a second end for sliding the transmission rail toward the bottom wall of the support plate; the cam is provided with a first end for sliding the transmission rail toward the bottom wall of the support plate; the ... Both of the two connecting plates have linkage shafts extending toward the transmission groove, the two linkage shafts are coaxially arranged and a coupling sleeve is connected between the two linkage shafts, and both of the connecting plates are provided with a driving motor for driving the adjacent linkage shafts to rotate axially. The adjustment control unit also includes two transmission gears, and the two transmission gears are respectively arranged on the two linkage shafts. The inner circumferential wall of the transmission groove is provided with transmission tooth grooves corresponding to the positions of the two linkage shafts, and the two transmission gears are meshed with their respective corresponding transmission tooth grooves. The first loading cylinder is arranged on the top wall of the transmission plate and the bottom wall of the transmission plate is clearance-matched with the top wall of the transmission slide rail.

2. The crane slewing bearing test fixture according to claim 1, characterized in that: A support roller is rotatably provided on the coupling sleeve, and a raceway for the support roller to roll is provided on the inner peripheral wall of the transmission groove. Two limit shafts are relatively provided on the bottom wall of the transmission plate, and two limit grooves are provided on the top wall of the transmission slide rail along the curvature direction of the transmission slide rail. The two limit shafts correspond to the two limit grooves one by one and are plug-fitted. The ends of the two limit shafts are connected to an arc plate, the arc plate is movably arranged in the limit groove and the bottom wall of the arc plate is affixed with a wear-resistant pad for increasing the friction resistance between the arc plate and the limit groove. The wear-resistant pad is made of rubber material, and the bottom wall of the transmission plate is provided with an electric push rod corresponding to the two limit shafts for driving the limit shaft to move so that the wear-resistant pad contacts or separates from the bottom wall of the limit groove.

3. The crane slewing bearing test fixture according to claim 1, characterized in that: A rotating groove is provided on the base, a turntable is rotatably arranged in the rotating groove, the transmission slide is arranged on the turntable and a plurality of support columns are connected between the transmission slide and the turntable, and a servo motor for driving the turntable to rotate is provided in the base.

4. The crane slewing bearing test fixture according to claim 3, characterized in that: The bottom wall of the tooling sleeve is provided with a tooling plate, the bottom wall of the tooling plate is provided with a tooling groove, a matching disk is rotatably provided in the tooling groove, the bottom wall of the matching disk is hingedly matched with the starting end of the transmission shaft, an anti-slip groove is circumferentially provided on the inner circumferential wall of the tooling groove, an anti-slip ring is circumferentially provided on the outer circumferential wall of the matching disk, and the anti-slip ring is snap-fitted with the anti-slip groove.

5. The crane slewing bearing test fixture according to claim 1, characterized in that: A top plate is horizontally opened on the top of the frame plate, and the top plate is arranged relatively parallel to the support plate. The second loading component includes a plurality of second loading cylinders arranged on the top wall of the top plate and a transmission disk located below the top plate. The output ends of the plurality of second loading cylinders are all passed through the top plate and are arranged toward the tooling sleeve. The output ends of the plurality of second loading cylinders are all connected to the transmission disk, and the transmission disk is connected to the top wall of the tooling sleeve through a loading shaft.

6. The crane slewing bearing test fixture according to claim 1, characterized in that: The driving component includes a high-frequency motor arranged on the support plate, and the output end of the high-frequency motor is coaxially connected to the core shaft.

7. The crane slewing bearing test fixture according to claim 1, characterized in that: The tooling seat is provided with a tooling hole for the core shaft to pass through, and a test bearing is transmission-connected between the tooling hole and the core shaft.

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