Test tool for slewing bearing of crane

Abstract

The invention discloses a crane slewing bearing test tool which comprises a base and a frame plate arranged on the base, a supporting plate is horizontally arranged on the frame plate, tool bases are arranged at the two ends of the supporting plate, a mandrel is movably arranged between the two tool bases, a tool sleeve is arranged on the mandrel in a sleeving mode, and a mounting cavity is formed between the tool sleeve and the mandrel. The base is provided with a first loading piece used for applying radial loading acting force to the tool sleeve and a regulation and control piece used for being in linkage fit with the first loading piece to enable the loading direction of the first loading piece to be changed, and the frame plate is provided with a second loading piece used for applying radial loading acting force to the tool sleeve. The supporting plate is provided with a driving part used for driving the mandrel to operate so as to simulate the actual operation condition of the bearing. The problems that a traditional crane slewing bearing test tool is single in test loading direction, the actual operation working condition of the bearing is difficult to simulate, and the loading working conditions of loads in different directions during actual operation of the bearing cannot be simulated are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing test devices for cranes, and particularly to a test tooling for a crane slewing bearing. Background Art

[0002] As a key device for engineering construction and material handling, the slewing bearing of a crane bears the self-weight of the upper structure of the crane and the weight of the lifted heavy object. At the same time, it needs to withstand complex radial, axial loads and overturning moments. Its performance directly affects the operation safety and reliability of the crane. Currently, there are many deficiencies in the traditional test tooling for crane slewing bearings during the test process: on the one hand, the test loading direction is relatively single, and most can only apply radial loads in a fixed direction to the bearing, making it difficult to simulate the different-direction weight load loading conditions that the bearing experiences due to different working states of the crane (such as lifting, slewing, luffing, etc.) during actual operation. For example, when the crane slews, the direction of the radial load on the bearing changes with the slewing angle, and the traditional tooling cannot effectively simulate this dynamic change process; on the other hand, the traditional tooling often has difficulty in comprehensively simulating the actual operating conditions of the bearing. During actual operation, the bearing bears the loads of both the upper structure self-weight and the lifted heavy object, and there are differences in the loading directions and acting modes of the two. The traditional tooling usually can only simulate one of the load conditions singly, resulting in a deviation between the test results and the actual operating conditions, and it is impossible to accurately evaluate the performance of the bearing under complex conditions. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a test tooling for a crane slewing bearing to solve the problems of single test loading direction of the traditional crane slewing bearing test tooling, difficulty in simulating the actual operating conditions of the bearing, and lack of simulation of the different-direction load loading conditions experienced by the bearing during actual operation.

[0004] To achieve the above-mentioned purpose, the present invention provides a crane slewing bearing test fixture, including a base and a frame plate set on the base, a support plate is horizontally opened on the frame plate, 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 the 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, 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 member for cooperating with the first loading member to change the loading direction of the first loading member to simulate the weight load loading condition in different directions during the actual operation of the bearing, a second loading member for applying a radial loading force to the tooling sleeve to simulate the deadweight load condition of the crane superstructure during the actual operation of the bearing is set on the frame plate, and a driving member for driving the core shaft to operate to simulate the actual operating condition of the bearing is set.

[0005] The advantages of adopting the above technical solution are as follows: in the above technology, a stable bearing platform is formed by basic components such as a base, a frame plate, and a 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, the weight load of the hoisted object can be dynamically simulated in the direction, 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 amplitude change); and the second loading member is independently arranged on the frame plate, which specifically simulates the deadweight load of the crane superstructure, and forms 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 in the test, which greatly improves the comprehensiveness of the working condition simulation; at the same time, the driving member directly acts 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, which effectively solves 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 is movably arranged at the bottom of the tooling sleeve, a movable groove for the transmission shaft to pass through to a position above the base is penetrated through the position of the tooling sleeve on the support plate, and the first loading component includes a first loading cylinder movably arranged on the base, an 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 advantages of adopting the above technical solution are as follows: In the above technology, a transmission shaft is added at the bottom of the tooling sleeve and coaxially connected to the first loading cylinder above the base through the movable groove, constructing a load transfer channel in the vertical direction. The transmission shaft serves as a force conduction hub, directly transmitting the radial acting force of the first loading cylinder to the tooling sleeve, avoiding problems such as force loss or direction deviation that may occur in the traditional indirect loading method, ensuring the simulation accuracy of the load of the lifted heavy object. The design of the movable groove provides axial movement freedom for the transmission shaft. The coaxial setting of the first loading cylinder and the transmission shaft enables the load action line to always pass through the center axis of the bearing, ensuring uniform application of the radial load and avoiding interference of eccentric load on the test results.

[0008] The present invention is further provided with: a transmission slide rail is arranged 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 a regulating member.

[0009] The advantages of adopting the above technical solution are as follows: The arc-shaped cross-section design of the transmission slide rail in the above technology is the key innovation for simulating variable-direction loads. Its layout with both ends close to the bottom wall of the support plate makes the movement 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 movement guide for the loading cylinder in the circumferential direction, allowing the load action direction to be continuously adjustable within a fan-shaped range, and being able to accurately simulate the follow-up radial load borne by the bearing during the slewing process of the crane. Compared with the traditional linear slide rail 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, enabling the test tooling to cover all radial load orientations that the bearing may encounter during actual operation.

[0010] The present invention is further provided with: a transmission groove is opened along the arc direction of the transmission slide rail, the transmission groove runs through the transmission slide rail in the width diameter direction. The regulating member includes a transmission plate, two connecting plates extend towards the base on both sides of the transmission plate, the two connecting plates are respectively arranged on both sides of the transmission slide rail, the two connecting plates both extend a linkage shaft into the transmission groove, the two linkage shafts are coaxially arranged and a coupling sleeve is connected between the two linkage shafts. Driving motors for driving the adjacent linkage shafts to rotate axially are arranged on both connecting plates. The regulating member further includes two transmission gears, the two transmission gears are respectively arranged on the two linkage shafts, transmission tooth grooves are respectively opened on the inner peripheral wall of the transmission groove at positions corresponding to the two linkage shafts, and the two transmission gears are respectively meshed with their 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 in clearance fit with the top wall of the transmission slide rail.

[0011] The advantages of adopting the above technical solution are as follows: In the above technology, the control part adopts a driving mode in which a transmission gear meshes with a transmission tooth groove. The driving motor drives the transmission shaft to rotate, and the rotation motion is converted into a linear motion of the transmission plate along the arc-shaped slide rail by using the meshing principle of the gear and the rack, achieving precise control of the position of the first loading cylinder. This transmission method has the advantages of high transmission efficiency, accurate positioning accuracy, and smooth and impact-free motion, avoiding the clearance error that may occur in the traditional screw-nut transmission or the slipping problem of the belt transmission, ensuring the position accuracy when the load direction changes. The symmetric arrangement of the two driving motors on both sides forms a dual-power driving system, improving the stability of the movement of the transmission plate and preventing tilting or jamming caused by unilateral force. At the same time, the coupling sleeve connects the transmission shafts at both ends, ensuring the synchronism of power transmission, so that the movement trajectory of the transmission plate on the arc-shaped slide rail strictly conforms to the designed radian. This control system combines automatic control with precision mechanical transmission, realizing intelligent and precise operation of the loading direction change, providing a reliable motion control platform for dynamic load simulation, effectively solving the problems of low efficiency and poor accuracy in manually adjusting the loading direction of the traditional tooling, and greatly improving the controllability of the test process and the data repeatability.

[0012] The present invention is further provided with: a support roller is rotatably arranged on the coupling sleeve, a raceway for the support roller to roll is arranged on the inner peripheral wall of the transmission groove, two limiting shafts are oppositely arranged on the bottom wall of the transmission plate, two limiting grooves are arranged on the top wall of the transmission slide rail along the radian direction of the transmission slide rail, the two limiting shafts and the two limiting grooves are in one-to-one correspondence and are inserted and arranged, arc-shaped plates are connected to the ends of the two limiting shafts, the arc-shaped plates are movably arranged in the limiting grooves, and wear-resistant pads for increasing the frictional resistance between the arc-shaped plates and the bottom walls of the limiting grooves are attached to the bottom walls of the arc-shaped plates. The wear-resistant pads are made of rubber material, and electric push rods for driving the limiting shafts to move so that the wear-resistant pads are in contact with or separated from the bottom walls of the limiting grooves are arranged at the positions corresponding to the two limiting shafts on the bottom wall of the transmission plate.

[0013] The advantages of adopting the above technical solutions are as follows: In the above technology, the matching design between the supporting rollers and the raceway converts the sliding friction between the transmission plate and the slide rail into rolling friction, significantly reducing the resistance during the movement of the regulating member, improving the transmission efficiency, reducing mechanical wear, extending the service life of the equipment. The insertion structure of the limiting shaft and the limiting groove, combined with the arc plate and the wear-resistant pad, provides a reliable braking function during the positioning of the loading cylinder: The electric push rod drives the limiting shaft to make the wear-resistant pad contact the bottom wall of the limiting groove, and uses the high-friction characteristic of the rubber material to lock the position of the transmission plate, preventing displacement deviation caused by vibration or load reaction force during the loading process. When the direction needs to be adjusted, the electric push rod retracts to separate the wear-resistant pad and release the braking state, ensuring that the transmission plate can move flexibly. Through the "rolling-braking" composite structure design, while ensuring the movement flexibility of the regulating member, it effectively improves the anti-interference ability and positioning stability of the loading system, solves the problem of loading position drift caused by mechanical vibration during the load application process of the traditional tooling. The arc matching design between the arc plate and the limiting groove makes the braking force evenly distributed, avoiding local stress concentration and further enhancing the structural reliability, providing a stable mechanical support environment for high-precision load simulation.

[0014] The present invention is further provided with: a rotating groove is formed 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 advantages of adopting the above technical solutions are as follows: In the above technology, the setting of the turntable and the servo motor constructs an omnidirectional rotating platform for the loading system. The transmission slide rail is fixed on the turntable through the support columns, expanding the movement range of the first loading cylinder from a partial circumference of the arc slide rail to a 360° rotation of the entire horizontal plane. The high-precision angle control function of the servo motor can accurately adjust the rotation angle of the turntable, which is coordinated with the position adjustment of the loading cylinder on the transmission slide rail, realizing the two-dimensional dynamic adjustment of the radial load in the horizontal direction and the circumferential direction. This design breaks through the limitation that a single arc slide rail can only adjust the load direction within a fixed plane, and can simulate the spatially variable-direction load borne by the bearing under complex working scenarios of a crane (such as multi-angle lifting and compound movement). The rigid connection of the support columns ensures the load transfer stability between the turntable and the slide rail, avoiding structural deformation or vibration during the rotation process.

[0016] The present invention is further provided with: a tooling plate is arranged on the bottom wall of the tooling sleeve, a tooling groove is formed on the bottom wall of the tooling plate, a mating disk is rotatably arranged in the tooling groove, the bottom wall of the mating disk is hinged and matched with the starting end of the transmission shaft, an anti-disengagement groove is circumferentially formed on the inner peripheral wall of the tooling groove, an anti-disengagement ring is circumferentially formed on the outer peripheral wall of the mating disk, and the anti-disengagement ring is engaged with the anti-disengagement 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 card-matching 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, and 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 configured as follows: 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 member 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 self-weight load of the crane superstructure. Through the coordinated work of multiple loading cylinders, the load size can be adjusted according to the self-weight parameters of different crane models. The load is applied in stages through the control system, which improves the flexibility and adaptability of the self-weight 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 and avoiding the influence of local overload on the bearing test results. The transmission connection design between the loading shaft and the tooling sleeve enables the self-weight 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 composite working condition of the bearing in actual operation simultaneously bearing the self-weight of the superstructure and the load of the hoisted heavy object.

[0020] The present invention further provides that: the driving member 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 benefits of adopting the above technical solution are: in the above technology, the high-frequency motor 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 mandrel to pass through is opened on the tooling seat, and a companion bearing is transmission-connected between the tooling hole and the mandrel.

[0023] The advantages of adopting the above technical solution are as follows: In the above technology, the test bearing is arranged between the tooling hole and the mandrel, undertaking the supporting role during the operation of the mandrel, effectively reducing the direct friction between the mandrel and the tooling seat, reducing the mechanical loss during the test, and prolonging the service life of the tooling. Description of the Drawings

[0024] Figure 1 3D view of the present invention; Figure 2 Partial 3D view of the drive slide rail and its linkage structure in the present invention; Figure 3 3D view of the mating state of the drive slide rail, drive plate and their linkage structure in the present invention; Figure 4 3D view of the mating state of the tooling seat, mandrel and the second loading member in the present invention; Figure 5 is Figure 4 cross-sectional view of; Figure 6 Simple side view of the mating state of the limit shaft and the arc plate in the present invention. Detailed Embodiment

[0025] The present invention provides a test tooling for a crane slew bearing, including a base 1 and a mounting plate 11 provided on the base 1. A support plate 12 is horizontally formed on the mounting plate 11. Tooling seats 13 are arranged at both ends of the support plate 12. A mandrel 14 is movably arranged between the two tooling seats 13. A tooling sleeve 2 is sleeved on the mandrel 14. An installation cavity for installing an external slew bearing to be tested is formed between the inner peripheral wall of the axial hole of the tooling sleeve 2 and the outer peripheral wall of the mandrel 14. A first loading member for applying a radial loading force to the tooling sleeve 2 to simulate the weight load condition exerted by the lifted heavy object during the actual operation of the bearing and a regulating member for cooperatively linking with the first loading member to change the loading direction of the first loading member to simulate different direction weight load loading conditions during the actual operation of the bearing are arranged on the base 1. A second loading member for applying a radial loading force to the tooling sleeve 2 to simulate the self-weight load condition of the upper structure of the crane during the actual operation of the bearing is arranged on the mounting plate 11. A driving member for driving the mandrel 14 to rotate to simulate the actual operation condition of the bearing is arranged on the support plate 12. A transmission shaft 21 is movably arranged at the bottom of the tooling sleeve 2. An activity slot 121 for the transmission shaft 21 to pass through to the upper position of the base 1 is formed through the support plate 12 corresponding to the position of the tooling sleeve 2. The first loading member includes a first loading cylinder 22 movably arranged on the base 1. The output end of the first loading cylinder 22 is arranged towards the bottom wall of the support plate 12 and the output end of the first loading cylinder 22 is coaxially connected with the transmission shaft 21. A transmission slide rail 3 is arranged 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 close to 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 regulating member. A transmission slot 31 is formed along the arc direction of the transmission slide rail 3. The transmission slot 31 runs through along the width diameter direction of the transmission slide rail 3. The regulating member includes a transmission plate 4. Connecting plates 41 extend towards the base 1 on both sides of the transmission plate 4. The two connecting plates 41 are respectively arranged on both sides of the transmission slide rail 3. The two connecting plates 41 both extend a linkage shaft 43 into the transmission slot 31. The two linkage shafts 43 are coaxially arranged and a coupling sleeve 44 is connected between the two linkage shafts 43. Driving motors 42 for driving the adjacent linkage shafts 43 to rotate axially are arranged on the two connecting plates 41. The regulating member further includes two transmission gears 431 respectively arranged on the two linkage shafts 43. Transmission tooth grooves 311 are formed on the inner peripheral wall of the transmission slot 31 corresponding to the positions of the two linkage shafts 43. The two transmission gears 431 are respectively meshed with the respective corresponding transmission tooth grooves 311. The first loading cylinder 22 is arranged on the top wall of the transmission plate 4 and the bottom wall of the transmission plate 4 is in clearance fit with the top wall of the transmission slide rail 3. A support roller 441 is rotatably arranged on the coupling sleeve 44. A raceway 312 for the support roller 441 to roll is formed on the inner peripheral wall of the transmission slot 31.Two limiting shafts 45 are oppositely arranged on the bottom wall of the transmission plate 4. Two limiting grooves 32 are formed in the top wall of the transmission slide rail 3 along the radian direction of the transmission slide rail 3. The two limiting shafts 45 and the two limiting grooves 32 correspond one by one and are arranged in an inserted manner. Arc-shaped plates 451 are connected to the ends of the two limiting shafts 45. The arc-shaped plates 451 are movably arranged in the limiting grooves 32, and wear-resistant pads for increasing the frictional resistance between the arc-shaped plates 451 and the limiting grooves 32 are attached to the bottom walls of the arc-shaped plates 451. The wear-resistant pads are made of rubber material. Electric push rods 46 for driving the limiting shafts 45 to move so that the wear-resistant pads are in contact with or separated from the bottom walls of the limiting grooves 32 are arranged at the corresponding positions of the two limiting shafts 45 on the bottom wall of the transmission plate 4. A rotating groove 15 is formed in the base 1. A turntable 151 is rotatably arranged in the rotating groove 15. The transmission slide rail 3 is arranged on the turntable 151, and a plurality of support columns 33 are connected between the transmission slide rail 3 and the turntable 151. A servo motor 152 for driving the turntable 151 to rotate is arranged in the base 1. A tooling plate 23 is arranged on the bottom wall of the tooling sleeve 2. A tooling groove 231 is formed in the bottom wall of the tooling plate 23. A mating disk 232 is rotatably arranged in the tooling groove 231. The bottom wall of the mating disk 232 is hinged and matched with the starting end of the transmission shaft 21. Anti-disengagement grooves 233 are circumferentially formed in the inner peripheral wall of the tooling groove 231. Anti-disengagement rings 234 are circumferentially formed on the outer peripheral wall of the mating disk 232. The anti-disengagement rings 234 and the anti-disengagement grooves 233 are in a snap-fit arrangement. A top plate 16 is horizontally formed at the top of the frame plate 11. The top plate 16 and the support plate 12 are arranged relatively parallel to each other. The second loading member includes a plurality of second loading cylinders 5 arranged on the top wall of the top plate 16 and a transmission disk 51 located below the top plate 16. The output ends of the plurality of second loading cylinders 5 penetrate through the top plate 16 and are arranged towards the tooling sleeve 2. The output ends of the plurality of second loading cylinders 5 are connected to the transmission disk 51. A loading shaft 52 is connected between the transmission disk 51 and the top wall of the tooling sleeve 2. The driving member includes a high-frequency motor 6 arranged on the support plate 12. The output end of the high-frequency motor 6 is coaxially connected to the core shaft 14. A tooling hole 131 for the core shaft 14 to pass through is formed in the tooling seat 13. A pilot bearing 132 is connected between the tooling hole 131 and the core shaft 14.,

[0026] Specific operation process: 1. Install the slewing bearing to be tested in the installation cavity between the tooling sleeve and the core shaft. Ensure the accurate axial and radial positions of the bearing through the traditional positioning structure. The two ends of the core shaft are connected to the tooling seat through pilot bearings to form a stable rotating support system; 2. Start the second loading member. The multiple second loading cylinders on the top plate extend synchronously. The self-weight load is evenly applied to the top wall of the tooling sleeve through the transmission disk and the loading shaft to simulate the radial load of the self-weight of the upper structure of the crane on the bearing; 3. According to the test working conditions, the first loading cylinder applies the weight load of the lifted heavy 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 position. At the same time, the driving motor drives the transmission gear of the regulating part to rotate in the transmission tooth groove, so that the transmission plate moves along the arc-shaped slide rail, adjusts the radial position of the first loading cylinder, and realizes the precise adjustment of the load direction. The limit shaft is controlled by the electric push rod to release the brake (the wear-resistant pad separates) during load adjustment and lock (the wear-resistant pad contacts the limit groove) during positioning to ensure the stability of the loading position; 4. The high-frequency motor drives the mandrel to rotate at the set speed, drives the bearing to be tested to rotate synchronously, simulates the speed condition in the actual operation of the crane, and cooperates with the loading system to realize the "load - speed" coupling simulation; 5. The first loading part and the second loading part work together to simulate the load of the lifted heavy object and the self-weight load of the upper structure respectively. The turntable and the transmission slide rail cooperate to apply the load in all directions. The support rollers and the anti-disengagement structure ensure the smoothness and safety of the mechanical movement; 6. During the test process, parameters such as the temperature rise, vibration, and load feedback of the bearing are monitored in real time. The test working conditions are adjusted according to the real-time states of the regulating part and the driving part. 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 working conditions.

[0027] In the above technology, to improve the test accuracy during the test process, a temperature rise detection sensor, a vibration sensor can be set, and load sensors can be set at the output ends of the first loading cylinder and the second loading cylinder. A force sensor can also be set at the connection between the tooling sleeve and the transmission shaft. The test data is detected according to different sensors. The above sensors are all existing technologies, so their structures and functions will not be elaborated too much.

[0028] In the above technology, each motor, the first loading cylinder, the second loading cylinder, and the electric push rod are all existing technologies, so their structures and functions will not be elaborated too much. At the same time, a control module, that is, an intelligent industrial computer, can be set according to actual needs to realize the control of multiple electronic components. The control module is an existing technology, so the communication connection methods between each motor, the first loading cylinder, the second loading cylinder, the electric push rod, and the control module will not be elaborated too much.

[0029] In the above technology, the bearing to be tested is marked as 7 in the specification drawings. At the same time, the bearing to be tested in the specification drawings is only for position reference, and its structure, size, and shape are not correspondingly limited.

[0030] Each component in the above specification drawings is only for illustration and reference, and its structure, size, and shape are not limited, and can be adjusted according to actual operation requirements.

[0031] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A test tooling for a crane slewing bearing, characterized in that: The invention comprises a base and a frame plate set on the base, wherein a support plate is horizontally provided on the frame plate, 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 in the actual operation of the bearing, and an adjustment control member for cooperating with the first loading member to change the loading direction of the first loading member to simulate the weight load loading condition in different directions to which the bearing is actually subjected during operation, 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 is set on the frame plate, and a driving member for driving the core shaft to operate to simulate the actual operating condition of the bearing is set.

2. The test tooling for the slewing bearing of a crane according to claim 1, wherein: A transmission shaft is movably arranged at the bottom of the tooling sleeve, and a movable groove for the transmission shaft to pass through to the position above the base is penetrated on the support plate corresponding to the position of the tooling sleeve, and the first loading component includes a first loading cylinder movably arranged on the base, and 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.

3. The test tooling for the slewing bearing of a crane according to claim 2, characterized in that: A transmission slide rail is arranged on the base, the radial cross section of the transmission slide rail is arranged in an arc shape, both 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.

4. A test tooling for a crane slewing bearing according to claim 3, characterized in that: The transmission slide rail is provided with a transmission groove along its arc direction, and the transmission groove is arranged to penetrate along the wide diameter direction of the transmission slide rail. The adjustment control unit includes a transmission plate, and connecting plates are extended toward the base direction on both sides of the transmission plate. Two connecting plates are arranged on both sides of the transmission slide rail, and 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. A driving motor for driving adjacent linkage shafts to rotate axially is arranged on the two connecting plates. The adjustment control unit also includes two transmission gears, and the two transmission gears are arranged on the two linkage shafts. Transmission tooth grooves are provided on the inner circumferential wall of the transmission groove 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.

5. The test tooling for the swing bearing of a crane according to claim 4, characterized in that: A support roller is rotatably arranged on the coupling sleeve. A raceway for the support roller to roll is formed on the inner peripheral wall of the transmission groove. Two limiting shafts are oppositely arranged on the bottom wall of the transmission plate. Two limiting grooves are formed on the top wall of the transmission slide rail along the arc direction of the transmission slide rail. The two limiting shafts and the two limiting grooves are in one-to-one correspondence and are inserted and arranged. Arc-shaped plates are connected to the ends of the two limiting shafts. The arc-shaped plates are movably arranged in the limiting grooves, and wear-resistant pads for increasing the frictional resistance between the arc-shaped plates and the bottom walls of the limiting grooves are attached to the bottom walls of the arc-shaped plates. The wear-resistant pads are made of rubber material. Electric push rods for driving the limiting shafts to move so that the wear-resistant pads are in contact with or separated from the bottom walls of the limiting grooves are arranged at the positions corresponding to the two limiting shafts on the bottom wall of the transmission plate.

6. The test tooling for the swing bearing of a crane according to claim 4, characterized in that: A rotating groove is formed 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. A servo motor for driving the turntable to rotate is arranged in the base.

7. A test tooling for a crane slewing bearing according to claim 6, characterized in that: A tooling plate is arranged on the bottom wall of the tooling sleeve. A tooling groove is formed on the bottom wall of the tooling plate. A mating disk is rotatably arranged in the tooling groove. The bottom wall of the mating disk is hinged and mated with the starting end of the transmission shaft. An anti-disengagement groove is annularly formed on the inner peripheral wall of the tooling groove. An anti-disengagement ring is annularly formed on the outer peripheral wall of the mating disk. The anti-disengagement ring and the anti-disengagement groove are in a snap-fit arrangement.

8. A test tooling for a crane slewing bearing according to claim 1, characterized in that: A top plate is horizontally formed on the top of the frame plate. The top plate and the support plate are relatively parallel. The second loading member 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 penetrate through the top plate and are arranged towards the tooling sleeve. The output ends of the plurality of second loading cylinders are connected to the transmission disk. A loading shaft is in transmission connection between the transmission disk and the top wall of the tooling sleeve.

9. The test tooling for the swing bearing of a crane according to claim 1, characterized in that: The driving member includes a high-frequency motor arranged on the support plate. The output end of the high-frequency motor is coaxially connected to the core shaft.

10. A test tooling for a crane slewing bearing according to claim 1, characterized in that: A tooling hole for the core shaft to pass through is formed on the tooling seat. A pilot bearing is in transmission connection between the tooling hole and the core shaft.

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