A cantilever bearing swing test bench

Abstract

The present invention relates to a cantilever bearing swing test bench. It comprises a bottom plate, on which a base is rotatably mounted, on which a first driving mechanism is arranged, and a test bench, wherein the four corners of the test bench are respectively connected to the base through servo telescopic cylinders, and further comprises an auxiliary support. The test bench comprises a frame and a swing platform, wherein the rotation axis of the swing platform extends in the front-rear direction, and a second driving mechanism and a braking mechanism are arranged on the frame; a flexible loading device and a motor driving device are installed on the swing platform, and a transition shaft assembly is transmission-connected between the motor driving device and the flexible loading device, and the flexible loading device comprises a suspension assembly and a plurality of lifting mechanisms; and a slot structure is arranged in the suspension assembly. The cantilever bearing swing test bench of the present invention realizes the simulation detection of the test bearing whose orientation is constantly changing after the load is applied, so that the simulation detection process can be close to the actual working condition.

Description

Technical Field

[0001] The invention relates to the technical field of bearing performance detection, in particular to a cantilever bearing swing test bench. Background Art

[0002] Ships will face the problem of lateral and longitudinal sway during navigation. In order to ensure the normal navigation of the ship, the ship machinery needs to have the performance of stable operation under lateral and longitudinal sway conditions. Therefore, the ship machinery needs more stringent performance testing before leaving the factory, which includes the sway test of the marine test bearings.

[0003] The swing test of the test bearing requires the use of special testing equipment. Most of the existing testing equipment directly performs testing by applying dynamic load or static load to the test bearing. The orientation of the test bearing will not change during the testing process. However, during actual navigation, the orientation of the test bearing and the main shaft installed in the test bearing will change continuously with the lateral and longitudinal swing of the ship. The existing testing equipment cannot simulate the working condition of the test bearing where the orientation changes continuously after the load is applied, which causes inconvenience to the simulated detection of the test bearing. Summary of the invention

[0004] The purpose of the present invention is to provide a cantilever bearing swing test bench to solve the technical problem that the detection equipment used to detect the test bearing in the prior art cannot simulate the working condition of the test bearing whose orientation is constantly changing after the load is applied, resulting in a large difference between the detection process and the actual working condition.

[0005] In order to achieve the above object, the present invention provides a cantilever bearing swing test bench, which adopts the following technical solution:

[0006] A cantilever bearing swing test bench comprises a bottom plate, a base is rotatably mounted on the bottom plate, a first driving mechanism for driving the base to rotate is arranged on the base, the test device also comprises a test bench located on the upper side of the base, the four corners of the test bench are respectively connected to the base through a servo telescopic cylinder, the upper end of the servo telescopic cylinder is connected to the test bench ball joint, the lower end of the servo telescopic cylinder is connected to the base through a universal joint, the test device also comprises an auxiliary support for constraining the test bench, the lower end of the auxiliary support is fixedly connected to the base, and the upper end is connected to the test bench, the test bench comprises a frame and a swinging platform rotatably mounted in the frame, the rotation axis of the swinging platform extends in the front-rear direction, the frame A second driving mechanism for driving the swing platform to rotate and a braking mechanism for braking the swing platform are provided on the frame; a flexible loading device and a motor driving device are installed on the swing platform, and a transition shaft assembly is transmission-connected between the motor driving device and the flexible loading device, and the flexible loading device includes a suspension assembly and a plurality of lifting mechanisms arranged at intervals along the outer peripheral side of the suspension assembly; a slot structure for assembling test bearings and transition shaft assemblies is provided in the suspension assembly, and the lifting mechanism includes a flexible part, a first telescopic cylinder and a second telescopic cylinder, one end of the flexible part is connected to the driving end of the first telescopic cylinder, and the other end is used to connect to the suspension assembly, and the driving end of the second telescopic cylinder faces upward and is supported in the middle of the flexible part.

[0007] Furthermore, a buffer and a tension sensor are installed between the flexible member and the suspension assembly or between the flexible member and the first telescopic cylinder.

[0008] Furthermore, a first pulley assembly for the flexible member to bypass is provided at the driving end of the second telescopic cylinder; and a second pulley assembly for the flexible member to bypass is provided on the cylinder wall of the second telescopic cylinder.

[0009] Furthermore, a gantry bracket is provided on the base, and a flexible traction mechanism is slidably suspended on the gantry bracket. The flexible traction mechanism includes a traction rope and a rotating assembly structure arranged at both ends of the traction rope. The rotating assembly structure is used for rotational assembly with the test bench. A length adjustment structure is also provided between each rotating assembly structure and the traction rope, and the length adjustment structure is used to adjust the overall length of the flexible traction mechanism.

[0010] Furthermore, the gantry support includes a support beam and support columns fixedly supported at both ends of the support beam, and the flexible traction mechanism includes a transverse traction mechanism arranged parallel to the support beam and a longitudinal traction mechanism arranged perpendicular to the support beam.

[0011] Furthermore, the transition shaft assembly includes a central shaft, a transition sleeve and a transition outer shell which are arranged in sequence from the inside to the outside, the central shaft is divided into a supporting section and an installation section, the transition sleeve is arranged on the outside of the supporting section and is fixed to the transition outer shell, the transition outer shell is installed and fixed to the swing platform, a transition bearing is installed between the central shaft and the transition sleeve, the part of the central shaft extending out of the transition sleeve and the transition outer shell constitutes the installation section, and the installation section is used to fit and fix the test bearing.

[0012] Furthermore, an end support is provided at the end of the transition shaft assembly, and the end support is arranged at the other end opposite to the motor drive device. The end support includes an end support shaft and an end support seat. One end of the end support shaft is transmission-connected to the center shaft, and the other end is rotatably assembled with the end support seat. A long hole is provided in the end support seat for the end support shaft to be inserted and for the end of the end support shaft to guide and slide.

[0013] Furthermore, a raising plate is installed on the swing platform, the end support seat and the motor drive device are both installed on the raising plate, the end support seat guide sliding assembly is on the raising plate, a screw mechanism for driving the end support seat guide movement is installed between the end support seat and the raising plate, a support platform is also installed on the raising plate, the support platform is located at the bottom of the suspension assembly, and a limiting groove matching the bottom shape of the suspension assembly is provided on the top surface of the support platform.

[0014] Furthermore, the auxiliary support includes a telescopic rod and a support frame arranged at the lower end of the telescopic rod, and the upper end of the telescopic rod is connected to the swing platform through a first Hooke's joint.

[0015] Furthermore, the braking mechanism includes a brake disc and a brake matching the brake disc, the brake disc is fixedly connected to the rotating shaft of the swing platform, and the brake is installed on the frame.

[0016] Compared with the prior art, the cantilever bearing swing test bench of the embodiment of the present invention has the following beneficial effects: by adopting the cantilever bearing swing test bench of the present invention, when testing is required, the test bearing set is first fixed on the mounting section of the central axis, and then the test bearing and the mounting section are installed in the slot structure of the suspension assembly, and then the loading of the set position of the suspension assembly is realized by adjusting the telescopic amount of the first telescopic cylinder and the second telescopic cylinder in each lifting mechanism, and after the adjustment is completed, the second driving mechanism is started to adjust the swing platform to the set inclination angle, and then the motor driving device is started, at this time, the central axis in the test bearing will rotate, and finally the swing drive of the test bench can be realized by adjusting the telescopic amount of each servo telescopic cylinder under the test bench, thereby realizing the simulation detection of the test bearing's position constantly changing after the load is applied. In addition, since the angle of the swing platform in the present invention is adjustable, the test bearing can be adjusted to the set inclination angle by adjusting the swing platform during the test, and then the horizontal and vertical swing can be simulated, so the cantilever bearing swing test bench of the present invention can also simulate the situation of horizontal and vertical swing again under complex inclination angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structure of the cantilever bearing swing test bench of the present invention is shown in FIG. Figure 1 ;

[0018] Figure 2 The overall structure of the cantilever bearing swing test bench of the present invention is shown in FIG. Figure 2 ;

[0019] Figure 3 It is a structural schematic diagram of a test bench in a cantilever bearing swing test bench of the present invention;

[0020] Figure 4 It is a structural schematic diagram of a servo hydraulic cylinder in a cantilever bearing swing test bench of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the Hooke's hinge in the cantilever bearing swing test bench of the present invention;

[0022] Figure 6 It is a schematic diagram of the assembly of the base and the bottom plate in the cantilever bearing swing test bench of the present invention;

[0023] Figure 7 yes Figure 6 A cross-sectional view of the base and the bottom plate in FIG.

[0024] Figure 8 It is a structural schematic diagram of the bottom plate in the cantilever bearing swing test bench of the present invention;

[0025] Fig. 9It is a structural schematic diagram of a base in a cantilever bearing swing test bench of the present invention;

[0026] Fig.10 It is a structural schematic diagram of the driving mechanism in the cantilever bearing swing test bench of the present invention;

[0027] Fig.11 yes Fig.10 The structural diagram of the motor and reducer in FIG.

[0028] Fig.12 yes Fig.10 A schematic diagram of the structure of the rotating shaft in FIG.

[0029] Fig.13 yes Fig.10 Schematic diagram of the assembly of the connecting sleeve, the plane bearing and the connecting ring;

[0030] Fig.14 yes Fig.10 A schematic diagram of the structure of the connecting sleeve in FIG.

[0031] Fig.15 yes Fig.10 A schematic diagram of the structure of the connecting ring in FIG.

[0032] Fig.16 This is a schematic diagram of the structure of the test bench in the cantilever bearing swing test bench of the present invention. Figure 1 ;

[0033] Fig.17 This is a schematic diagram of the structure of the test bench in the cantilever bearing swing test bench of the present invention. Figure 2 ;

[0034] Fig.18 This is a schematic diagram of the structure of the test bench in the cantilever bearing swing test bench of the present invention. Figure 3 ;

[0035] Fig.19 It is a structural schematic diagram of the auxiliary support in the cantilever bearing swing test bench of the present invention;

[0036] Fig. 20 It is a structural schematic diagram of a gantry bracket and a flexible traction mechanism in a cantilever bearing swing test bench of the present invention;

[0037] Fig.21 It is a structural schematic diagram of the flexible traction mechanism in the cantilever bearing swing test bench of the present invention;

[0038] Fig. 22 It is a schematic diagram of the overall structure of the flexible loading device in the cantilever bearing swing test bench of the present invention;

[0039] Fig.23It is a schematic diagram of the overall structure of the lifting mechanism in the cantilever bearing swing test bench of the present invention;

[0040] Fig.24 It is a schematic diagram of the overall structure of the suspension assembly in the cantilever bearing swing test bench of the present invention;

[0041] Fig.25 It is a schematic cross-sectional view of the internal structure of the suspension assembly in the cantilever bearing swing test bench of the present invention;

[0042] Fig.26 It is a schematic diagram of the assembly of the flexible loading device and the motor driving device in the cantilever bearing swing test bench of the present invention;

[0043] Fig. 27 It is a cross-sectional schematic diagram of a flexible loading device and a motor driving device in a cantilever bearing swing test bench of the present invention;

[0044] Fig.28 yes Fig. 27 A partial enlarged view of the middle A;

[0045] Fig.29 yes Fig. 27 A partial enlarged schematic diagram of the middle transition shaft assembly;

[0046] Fig.30 The overall structure of the cantilever bearing swing test bench of the present invention is shown in FIG. Figure 1 ;

[0047] Fig.31 The overall structure of the cantilever bearing swing test bench of the present invention is shown in FIG. Figure 2 ;

[0048] In the figure: 1-base plate; 2-base; 3-air spring; 4-bench; 5-motor; 6-worm gear reducer; 61-jack; 7-reducer fixing seat; 8-rotating shaft; 81-small diameter section; 82-large diameter section; 83-connecting flange; 84-connecting key; 9-fixing plate; 10-connecting sleeve; 101 horizontal part; 102-vertical part; 11-plane thrust ball bearing; 12-connecting ring; 121-convex edge; 13-mounting plate; 14-step hole; 15-fixing block; 16-test bench; 161-fixing hole; 1 7-servo hydraulic cylinder; 18-second Hook hinge; 181-second lower hinge seat; 182-second connecting rod; 183-second upper hinge body; 19-pad; 20-support plate; 21-ball head seat; 22-fixing hole; 23-avoidance groove; 24-perforation; 25-gantry bracket; 251-bracket column; 252-through hole; 253-bracket crossbeam; 26-flexible traction mechanism; 261-lateral traction mechanism; 262-longitudinal traction mechanism; 263-roller structure; 264-sliding roller; 265-limiting cover; 266-length adjustment structure; 267-rotation assembly structure; 27-swing platform; 28-connecting seat; 29-pin shaft; 30-speed reducer; 31-brake; 32-brake disc; 33-first bearing group; 34-second bearing group; 35-support frame; 36-telescopic rod; 37-first lower hinge seat; 38-first connecting rod; 39-first upper hinge body; 40-suspension assembly, 41-lifting mechanism, 42-bottom seat frame, 43-second telescopic cylinder, 44-first telescopic cylinder, 45-buffer, 46-tension sensor Device, 47-flexible part, 48-first pulley assembly, 49-second pulley assembly, 50-guide plate, 51-slot structure, 52-housing, 53-support platform, 54-lining, 55-test bearing, 56-heightening plate, 57-support platform, 58-motor drive device, 59-screw mechanism, 60-end support seat, 601-end support shaft, 602-cylindrical roller bearing, 61-center axis, 62-installation section, 63-support section, 64-transition sleeve, 65-transition bearing, 66-flexible loading device. DETAILED DESCRIPTION

[0049] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0050] The specific embodiment of the cantilever bearing rocking test bench of the present invention is as follows: Figures 1 to 30As shown, a cantilever bearing swing test bench according to a preferred embodiment of an embodiment of the present invention. The cantilever bearing swing test bench includes a bottom plate, on which a base is rotatably mounted, and the base is provided with a first driving mechanism for driving the base to rotate, the test device also includes a test bench located on the upper side of the base, the four corners of the test bench are respectively connected to the base through a servo telescopic cylinder, the upper end of the servo telescopic cylinder is connected to the test bench ball joint, and the lower end of the servo telescopic cylinder is connected to the base through a universal joint, the test device also includes an auxiliary support for constraining the test bench, the lower end of the auxiliary support is fixedly connected to the base, and the upper end is connected to the test bench, the test bench includes a frame and a swing platform rotatably mounted in the frame, the rotation axis of the swing platform extends in the front-rear direction, and the frame is provided with a second driving mechanism for driving the swing platform to rotate A driving mechanism and a braking mechanism for the braking swing platform; a flexible loading device 66 and a motor driving device 58 are installed on the swing platform, a transition shaft assembly is transmission-connected between the motor driving device 58 and the flexible loading device 66, the flexible loading device 66 includes a suspension assembly and a plurality of lifting mechanisms 41 spaced apart along the outer circumference of the suspension assembly; a slot structure 51 for assembling a test bearing 55 and a transition shaft assembly is provided in the suspension assembly, the lifting mechanism 41 includes a flexible part 47, a first telescopic cylinder 44 and a second telescopic cylinder 43, one end of the flexible part 47 is connected to the driving end of the first telescopic cylinder 44, and the other end is used to connect to the suspension assembly, the driving end of the second telescopic cylinder 43 faces upward and is supported in the middle of the flexible part 47.

[0051] Specifically, the cantilever bearing swing test bench in this embodiment can be divided into a swing test frame and a flexible loading device 66 , a transition shaft assembly, and a motor drive device 58 installed on the swing test frame.

[0052] like Figure 1 to Figure 21 As shown, the swing test frame in this embodiment includes a base plate 1, a base 2, a first driving mechanism, an auxiliary support, a gantry bracket, a flexible traction mechanism, a second driving mechanism, a braking mechanism and a test bench 16. Among them, the base 2 is rotatably assembled on the base plate 1, and the rotation axis of the base 2 extends in the up and down direction. The first driving mechanism is used to drive the base 2 to rotate relative to the base plate 1. Two parallel and spaced fixed blocks 15 are fixedly connected to the base 2, and the two ends of the fixed block 15 are respectively fixedly connected with a servo telescopic cylinder extending upward. Preferably, the servo telescopic cylinder is a servo hydraulic cylinder 17. The upper end of the servo hydraulic cylinder 17 is connected to the test bench 16.

[0053] Specifically, the lower end of the servo hydraulic cylinder 17 is fixedly connected to the base through a universal joint, so that the servo hydraulic cylinder 17 can swing within a certain angle when extending and retracting. In this embodiment, the universal joint is a second Hooke's joint 18. Figure 4 , Figure 5As shown, the second Hooke's hinge 18 includes a second lower hinge seat 181, a second upper hinge body 183 and a second connecting rod 182, and the second lower hinge seat 181 is fixedly connected to the fixed block. The second lower hinge seat 181 includes two parallel connecting ears, and the connecting ears have a hinge hole. The second connecting rod 182 is hinged between the two connecting ears through a hinge rod. The second upper hinge body 183 has two, and the two second upper hinge bodies 183 are hinged on both sides of the second connecting rod 182. The rotation axis of the second upper hinge body 183 and the second connecting rod 182 and the rotation axis of the second connecting rod 182 and the second lower hinge seat 181 are perpendicular. The second upper hinge body 183 is fixedly connected to the lower end of the servo hydraulic cylinder 17 by bolts.

[0054] Reference Figure 3 As shown, the upper end of the servo hydraulic cylinder 17 is connected to the lower side of the test bench 16 by a ball joint. Specifically, the upper end of the servo hydraulic cylinder 17 has a stud, and a ball head is threadedly connected to the stud. A ball head seat 21 matching the ball head has two ears, and a fixing hole 22 is opened on the ear. The lower side of the test bench 16 has a fixing hole 161 corresponding to the fixing hole.

[0055] A displacement sensor is installed on the servo hydraulic cylinder 17 . When the servo hydraulic cylinder 17 is extended or retracted, the displacement sensor can detect the extension length of the servo hydraulic cylinder 17 , thereby accurately controlling the extension length of the servo hydraulic cylinder 17 .

[0056] like Figure 6 , Figure 7 , Figure 8 As shown, the bottom plate 1 includes a frame and a panel fixedly connected to the upper side of the frame. The panel has a through hole at the center thereof penetrating the upper and lower sides of the panel, and a mounting plate is fixedly connected in the through hole. The mounting plate is provided with a step hole 14 penetrating the upper and lower sides of the mounting plate, and a plurality of fixing bolts are installed on the steps of the step hole 14. The panel is fixedly connected to the two sides of the step hole 14 with the mark rods 4 extending upward.

[0057] Reference Fig. 9 As shown, the base 2 includes a frame and an outer plate wrapped around the outside of the frame, and a through hole 24 is provided at the center of the upper outer plate, penetrating the upper and lower sides of the base 2, and the through hole 24 is correspondingly connected to the step hole 14 on the bottom plate 1. The outer plate has avoidance grooves on both sides of the through hole 24 for the pole 4 on the bottom plate 1 to pass upward.

[0058] In this embodiment, the base 2 and the bottom plate 1 are rotatably assembled through a bearing. Specifically, a fixing plate 9 is installed in the through hole of the bottom plate 1, a through hole is opened in the center of the fixing plate 9, and a connecting sleeve 10 is fixedly connected to the lower side of the fixing plate 9 by bolts. Fig.14As shown, the connecting sleeve 10 is a T-shaped structure, and the T-shaped connecting sleeve 10 includes a horizontal portion 101 and a vertical portion 102. The horizontal portion 101 has a plurality of fixing holes arranged circumferentially and penetrating the horizontal portion 101 vertically, and bolts for connecting with the fixing plate 9 are installed in the fixing holes. The center hole of the connecting sleeve 10 and the through hole of the fixing plate 9 are equidiametrically connected. A plane bearing is mounted on the vertical portion 102 of the connecting sleeve 10, and preferably, the plane bearing is a plane thrust ball bearing 11. The upper end surface of the plane thrust ball bearing 11 is fixedly connected to the horizontal portion 101 of the connecting sleeve 10 by bolts.

[0059] A connecting ring 12 is fixedly connected to the step hole 14 of the bottom plate 1 by bolts. Fig.13 , 15 As shown, the connecting ring 12 is embedded in the large diameter section of the step hole 14, and the center of the connecting ring 12 has a center hole that is equal in diameter to the small diameter section of the step hole 14. The vertical portion 102 of the connecting sleeve 10 is embedded in the center hole of the connecting ring 12 and the small diameter section of the step hole 14. The outer peripheral wall of the connecting ring 12 has a flange 13 extending upward, and an annulus is provided between the flange 13 and the connecting sleeve 10. The lower end of the plane thrust ball bearing 11 is embedded in the annulus, and the lower end face of the plane thrust ball bearing 11 is fixedly connected to the connecting ring 12 by bolts. The base 2 is relatively fixed to the upper end face of the plane thrust ball bearing 11, and the bottom plate 1 is opposite to the lower end face of the plane thrust ball bearing 11, so as to realize the rotational assembly of the base 2 and the bottom plate 1.

[0060] In this embodiment, the first driving mechanism includes a motor 5, a reducer and a rotating shaft 8. Fig.10 , Fig.11 , Fig.12 As shown, the motor 5 is connected to the reducer in a transmission manner, and the reducer is a worm gear reducer 6. The worm gear reducer 6 is fixedly connected to the base 2 through a reducer fixing seat 7, and the reducer fixing seat 7 includes a bottom plate 1, a vertical plate, and a reinforcing plate connected between the bottom plate 1 and the vertical plate. The bottom plate 1 has a connecting hole fixedly connected to the base 2, and the vertical plate has a fixing hole fixedly connected to the worm gear reducer 6. The worm gear reducer 6 is connected to the rotating shaft 8 through a key, and the output end of the worm gear reducer 6 has a socket 61, and the socket 61 has a keyway, and the rotating shaft 8 has a connecting key 84 matching the keyway. In this embodiment, the rotating shaft 8 is a variable diameter shaft, and the rotating shaft 8 includes a large diameter section, a small diameter section, and a connecting flange 83 fixedly connected to the end of the large diameter section. The small diameter section of the rotating shaft 8 is fixedly matched with the worm gear reducer 6, and the keyway is axially arranged on the small diameter section of the rotating shaft 8. The large diameter section is inserted into the connecting sleeve 10. A fixing plate is fixedly connected to the lower end of the base plate 1. The middle part of the fixing plate has a positioning hole that matches the positioning protrusion on the lower side of the rotating shaft 8. The fixing plate has a fixing hole that passes through the connecting hole of the connecting flange 83. The connecting flange 83 and the fixing plate are fixed by bolts to achieve a fixed connection between the rotating shaft 8 and the base plate 1.

[0061] In this embodiment, the avoidance groove is an arc-shaped avoidance groove, so that when the driving mechanism drives the base 2 to rotate, the mark rod 4 can move in the base 2. The openings of the two arc-shaped avoidance grooves 23 on the base 2 are arranged opposite to each other, and a scale is fixedly connected to the groove edge of the avoidance groove 23. When the base 2 and the bottom plate 1 do not rotate relative to each other, the mark rod 4 corresponds to zero degree on the scale.

[0062] In this embodiment, the base 2 and the bottom plate 1 are both rectangular structures, and air springs 3 are respectively installed at the four corners of the rectangular bottom plate 1. A support plate 20 is arranged on the lower side of the bottom plate 1, and a cushion block 19 is provided at the position of the support plate corresponding to the air spring 3.

[0063] Reference Fig.16 , Fig.17 , Fig.18 , Fig.19 As shown, the test bench includes a frame and a swing platform 27 rotatably assembled in the frame, and the rotation axis of the swing platform 27 extends in the front-to-back direction. In this embodiment, the frame is a rectangular frame, and the swing platform 27 is a rectangular plate. The front and rear sides of the frame are respectively provided with a second driving mechanism and a braking mechanism. In this embodiment, the second driving mechanism includes a motor and a reducer 30, and the reducer 30 is specifically a worm gear reducer. The second driving mechanism is installed at the front end of the frame, and the motor and the reducer 30 are connected in a transmission connection. A first rotating shaft portion is connected between the output shaft of the reducer 30 and the swing platform 27, and the first rotating shaft portion is a transmission shaft. The first rotating shaft portion is used to connect to the swing platform 27 with a flange plate on one side facing the swing platform 27. In this embodiment, the braking mechanism is installed at the rear end of the frame, and the braking mechanism includes a brake disc 32 and a brake 31. In this embodiment, a second rotating shaft portion is arranged between the brake disc and the swing platform. The second rotating shaft portion is also a transmission shaft. One end of the second rotating shaft portion is connected and fixed to the swing platform 27 through a flange, and the brake disc 32 is integrally arranged at the other end of the second rotating shaft portion. When the swing platform 27 swings to a set angle, the swing angle of the swing platform 27 can be fixed by clamping the brake disc 32 with the brake 31.

[0064] In this embodiment, the front and rear ends of the swing platform 27 are also provided with a first bearing group 33 and a second bearing group 34, respectively. The first bearing group 33 includes a bearing housing and a bearing installed in the bearing housing. The first shaft portion and the second shaft portion are both rotatably assembled in the corresponding bearing group. Specifically, the first bearing group 33 is used to support the middle position of the first shaft portion, and the second bearing group 34 is used to support the middle position of the second shaft portion. In this embodiment, the first shaft portion and the second shaft portion are coaxially arranged, so that the swing platform 27 will rotate around the first shaft portion and the second shaft portion. In other embodiments, the first shaft portion and the second shaft portion can also be arranged on the same transmission shaft. In this embodiment, end plate structures are also fixed at the front and rear ends of the swing platform 27. The end plate structures are installation plates arranged at the front and rear ends of the swing platform 27. Both end plate structures are arranged vertically with the swing platform 27. The arrangement of the end plate structures increases the end surface area of ​​the swing platform 27, thereby facilitating the flange connection between the first shaft portion and the swing platform 27, and the second shaft portion and the swing platform 27.

[0065] In this embodiment, a gantry structure is provided at both the front and rear ends of the frame. The gantry structure is a door-shaped connecting frame installed at the front and rear ends of the platform frame. The gantry structure is mainly used to fix the connection with the rope of the pulling test bench. The rope is mainly set to suspend the test bench to prevent the test bench from falling when the servo hydraulic cylinder fails.

[0066] In this embodiment, a connection seat 28 is provided on both sides of the frame, and the cross section of the connection seat 28 is an isosceles trapezoid. The connection seat 28 is provided with a fixing hole for inserting a pin 29. When the test bench is not in use, the pins 29 are inserted into the fixing holes, and then the pins 29 are fixedly connected to the gantry bracket 25 by screws or bolts, so that the test bench can be stopped at the set position by the pins 29.

[0067] In order to facilitate the measurement of the swing angle of the swing platform 27, in this embodiment, an arc scale is provided on the brake disc 32, and an indicator needle for indicating the scale of the arc scale is provided on the frame. When the brake disc 32 rotates with the second rotating shaft portion, the arc scale will also rotate. The swing angle of the swing platform 27 can be measured by reading the value indicated by the indicator needle.

[0068] In this embodiment, the swing platform 27 includes a flat plate structure and a reinforcing structure fixed to the bottom of the flat plate structure. The flat plate structure is a rectangular flat plate, and the reinforcing structure is a reinforcing rib welded and fixed to the bottom of the rectangular flat plate.

[0069] In order to enhance the stability of the structure, an auxiliary support is also fixedly connected to the base. The auxiliary support includes a telescopic rod 36 and a support frame 35 supported at the bottom of the telescopic rod 36. The bottom of the support frame 35 is fixedly connected to the base by screws. The telescopic rod 36 and the support frame 35 are connected and fixed by flanges. The top of the telescopic rod 36 is connected and fixed to the swing platform 27 by a first Hooke's hinge. The first Hooke's hinge includes a first lower hinge seat 37, a first upper hinge body 39 and a first connecting rod 38. The first lower hinge seat 37 is fixedly connected to the telescopic rod 36, the first upper hinge body 39 is fixedly connected to the swing platform 27, the upper end of the first connecting rod 38 is hinged to the first upper hinge body 39, and the lower end is hinged to the first lower hinge seat 37. The rotation axis of the first connecting rod 38 and the first lower hinge seat 37 and the rotation axis of the first connecting rod 38 and the first upper hinge body 39 are perpendicular. The first Hooke's hinge enables the swing platform 27 to swing left and right and front and back around the top of the auxiliary support. In this embodiment, the telescopic rod 36 is a jack. The first Hooke's hinge constraint ensures that the test bench always swings around the center position. During the installation of the entire test platform, the telescopic rod can pre-adjust the height position of the entire moving platform. Once the adjustment is completed, it can be locked with a bolt locking device.

[0070] Reference Fig. 20 , Fig.21 As shown, a gantry bracket 25 is fixedly connected to the base, and a flexible traction mechanism 26 is slidably mounted on the gantry bracket 25. The flexible traction mechanism 26 includes a traction rope and a rotating assembly structure 267 arranged at both ends of the traction rope, the rotating assembly structure 267 is used for rotating assembly with the test bench, and a length adjustment structure 266 is further arranged between each rotating assembly structure 267 and the traction rope, and the length adjustment structure 266 is used to adjust the overall length of the flexible traction mechanism 26 to adjust the tightness of the flexible traction mechanism 26.

[0071] The gantry support 25 includes two support columns 251 arranged opposite to each other and a support beam 253 extending between the two support columns 251. In this embodiment, the support beam 253 is an I-beam, and the two support columns 251 are both triangular frames. Each support column 251 is welded and formed by rectangular steel, and the support column includes an isosceles triangle-shaped outer frame and a plurality of inner supports welded in the outer frame. There are two flexible traction mechanisms 26, and the two flexible traction mechanisms 26 can be divided into a transverse traction mechanism 261 and a longitudinal traction mechanism 262 according to different extension directions, wherein the transverse traction mechanism 261 is arranged along the extension direction of the support beam 253, and the longitudinal traction mechanism 262 is arranged perpendicular to the support beam 253.

[0072] In this embodiment, the flexible traction mechanism 26 includes a traction rope, which is specifically a steel wire rope. The flexible traction mechanism 26 also includes a rotating assembly structure 267 and a length adjustment structure 266 arranged at both ends of the traction rope. The length adjustment structure 266 and the traction rope, and the length adjustment structure 266 and the rotating assembly structure 267 are connected by hanging rings. The rotating assembly structure 267 includes a rotating shaft and a plurality of bearings arranged on the rotating shaft. The test bench is provided with a mounting hole for the rotating assembly structure 267 to pass through. In addition, in order to prevent the rotating shaft from coming out of the mounting hole, a sleeve is provided on the outer side of the rotating shaft, and the outer peripheral side of the sleeve is stepped. Bearings of different diameters are correspondingly arranged at different diameters of the sleeve, and correspondingly, the mounting hole is also a stepped hole. In this embodiment, a hanging ring is provided at one end of the rotating shaft, and an external thread is provided on the outer peripheral side of the rotating shaft. The rotating shaft is connected and fixed to the sleeve by threaded assembly. During the installation process, each bearing is first placed in the mounting hole, and then the sleeve is inserted into the mounting hole from the side with a larger aperture of the mounting hole, and the rotating shaft is screwed into the sleeve from the side with a smaller aperture of the mounting hole. Finally, the end cover is fixed at the end with a larger aperture of the mounting hole. The end cover is installed by screw fixing. The end cover can stop and limit the ends of the bearing and the sleeve, thereby avoiding the situation where the rotating assembly structure 267 falls out of the mounting hole.

[0073] In this embodiment, the length adjustment structure 266 includes a threaded sleeve and a threaded column threadedly assembled in the threaded sleeve. The threaded sleeve is provided with an internal thread, and both ends of the threaded sleeve are threadedly assembled with a threaded column, and each threaded column is provided with a hanging ring at the end outside the threaded sleeve. When the length needs to be adjusted, it can be done by screwing the threaded sleeve or the threaded column.

[0074] Since the traction rope is slidably assembled on the gantry bracket 25, in order to reduce the friction between the traction rope and the gantry bracket 25, a roller structure 263 is further provided on the gantry bracket 25 in this embodiment. The roller structure 263 includes a sliding roller and a limiting cover 265 provided on the outer peripheral side of the sliding roller. The sliding roller is a concave wheel, that is, an annular groove for the traction rope to be inserted laterally is provided on the outer peripheral surface of the sliding roller. In this embodiment, the limiting cover 265 is in the shape of a U-shaped groove, and a gap is formed between the limiting cover 265 and the sliding roller for the traction rope to pass through. The setting of the limiting cover 265 can prevent the traction rope from escaping from the roller structure 263, thereby ensuring the safety and stability of the operation. The longitudinal traction mechanism 262 is correspondingly provided with a roller structure 263, and the roller structure 263 is arranged at the middle position of the support beam 253, while the transverse traction mechanism 261 is correspondingly provided with four roller structures 263, two of which are arranged at the two end positions of the support beam 253, and the remaining two roller structures 263 are respectively arranged on the corresponding support columns 251.

[0075] Since both ends of the lateral traction mechanism 261 need to bypass the support column 251 to be connected to the test bench, in order to facilitate the connection of the lateral traction mechanism 261, a through hole 252 is provided on each support column 251. Since the support column 251 in this embodiment is a triangular frame structure, the gap (through hole) inside the support column 251 constitutes the through hole 252.

[0076] like Figure 22 to Figure 25 As shown, the flexible loading device 66 in this embodiment includes a suspension assembly and a plurality of lifting mechanisms 41 arranged at intervals along the outer peripheral side of the suspension assembly; a slot structure 51 for assembling a test bearing 55 is arranged in the suspension assembly, and the lifting mechanism 41 includes a flexible member 47, a first telescopic cylinder 44 and a second telescopic cylinder 43, one end of the flexible member 47 is connected to the driving end of the first telescopic cylinder 44, and the other end is used to connect to the suspension assembly, and the driving end of the second telescopic cylinder 43 faces upward and is supported in the middle of the flexible member 47. Specifically, in this embodiment, there are four lifting mechanisms 41, which are respectively arranged at four positions of the suspension assembly, and the suspension assembly is located at the center of the four lifting mechanisms 41.

[0077] like Fig.23 As shown, in this embodiment, each lifting mechanism 41 includes a first telescopic cylinder 44 and a second telescopic cylinder 43 arranged in parallel. The first telescopic cylinder 44 and the second telescopic cylinder 43 are both extended and arranged in the vertical direction and the driving ends are both located at the top. In this embodiment, the first telescopic cylinder 44 and the second telescopic cylinder 43 are both hydraulic telescopic cylinders. In other embodiments, the first telescopic cylinder 44 and the second telescopic cylinder 43 can also be electric push rods, cylinders, etc. In this embodiment, the size of the first telescopic cylinder 44 is smaller than the size of the second telescopic cylinder 43, and the second telescopic cylinder 43 is located between the suspension assembly 40 and the first telescopic cylinder 44. In this embodiment, the flexible member 47 is a steel wire rope. In other embodiments, the flexible member 47 can also be a hemp rope, a chain, a high-strength carbon fiber rope, etc. One end of the flexible member 47 is connected and fixed to the driving end of the first telescopic cylinder 44, and the other end is used to connect to the suspension assembly 40. In this embodiment, the second telescopic cylinder 43 is supported at the middle position of the flexible member 47. Since the size of the second telescopic cylinder 43 is larger, the flexible member 47 as a whole presents an arched shape with the middle bulging upward and the two ends extending downward.

[0078] Since the flexible member 47 is to pull the suspension assembly 40 to move, in order to avoid the rigid pulling between the suspension assembly 40 and the flexible member 47, a buffer member 45 is installed between the flexible member 47 and the suspension assembly 40 in this embodiment. The buffer member 45 is a tension spring in this embodiment. In other embodiments, the buffer member 45 can also be installed at a position between the flexible member 47 and the first telescopic cylinder 44.

[0079] In order to facilitate the observation of the force applied by each flexible member 47, a tension sensor 46 is also installed between the buffer member 45 and the suspension assembly 40 in this embodiment. The tension sensor 46 can monitor the force between the flexible member 47 and the suspension assembly 40 in real time, so that the staff can obtain the corresponding tension data in time. In other embodiments, the tension sensor 46 can also be installed at other positions such as between the flexible member 47 and the first telescopic cylinder 44.

[0080] Since the flexible member 47 needs to go around the top (driving end) of the second telescopic cylinder 43, in order to avoid the situation where the flexible member 47 is easily worn due to large friction, a first pulley assembly 48 is installed on the top of the second telescopic cylinder 43 in this embodiment. In order to prevent the flexible member 47 from easily detaching from the first pulley assembly 48, the first pulley assembly 48 in this embodiment includes three pulleys, which are arranged in a straight line, and the flexible member 47 goes around the corresponding pulleys in a wave shape.

[0081] In order to avoid the flexible member 47 from contacting the second telescopic cylinder 43, a second pulley assembly 49 is further installed on the cylinder wall of the second telescopic cylinder 43 in this embodiment. In this embodiment, the second pulley assembly 49 includes only one pulley, which is supported between the second telescopic cylinder 43 and the flexible member 47, thereby avoiding the flexible member 47 from contacting the second telescopic cylinder 43. It should be noted that in order to further achieve the limiting effect on the flexible member 47, each pulley in this embodiment is a concave pulley, that is, the outer peripheral surface of each pulley is provided with an annular groove for the flexible member 47 to be inserted laterally.

[0082] Since the first pulley assembly 48 moves up and down with the extension and retraction of the second telescopic cylinder 43, in order to enhance the guiding effect, in this embodiment, a guide plate 50 is further installed on the cylinder wall of the second telescopic cylinder 43, and the guide plate 50 is also extended in the up and down direction. In this embodiment, there are two guide plates 50, which are symmetrically arranged on both sides of the second telescopic cylinder 43, and each guide plate 50 is provided with a guide groove, and the corresponding two sides of the first pulley assembly 48 are provided with a slider protrusion inserted into the corresponding guide groove, and the slider protrusion can slide in the guide groove, and the guiding effect is enhanced by the limiting effect of the slider protrusion and the guide groove.

[0083] In this embodiment, the suspension assembly 40 includes an inner liner 54 and an outer shell 52, wherein the inner liner 54 is installed on the inner side of the outer shell 52. Since a test bearing 55 is to be installed in the suspension assembly 40, in order to facilitate the installation of the test bearing 55, in this embodiment, the inner liner 54 and the outer shell 52 are both detachably arranged. Fig.24 and Fig.25As shown, in this embodiment, the suspension assembly 40 is spherical, the outer shell 52 corresponds to the spherical outer shell 52, and the liner 54 is also a spherical structure. In this embodiment, the outer shell 52 includes two upper and lower parts, both of which are hemispherical, and the liner 54 also includes two upper and lower parts, both of which are hemispherical. The two parts of the outer shell 52 are fixed by bolts, and the two parts of the liner 54 are also fixed by bolts. In this embodiment, the liner 54 can rotate in the outer shell 52. In order to limit the rotation direction, in this embodiment, a long strip protrusion is provided on the outer peripheral surface of the liner 54, and a guide groove for the long strip protrusion to be inserted horizontally is correspondingly provided on the inner wall of the outer shell 52.

[0084] In this embodiment, a slot structure 51 for installing a test bearing 55 and a corresponding shaft is provided in the inner liner 54. In this embodiment, the slot structure 51 includes a circle of annular grooves provided on the inner wall of the inner liner 54, and also includes a circular through hole that penetrates the inner liner 54 and the outer shell 52 at the same time. When installing the test bearing 55, the test bearing 55 is inserted horizontally into the annular groove of half of the inner liner 54, and then the other half of the inner liner 54 is snapped in place. The corresponding shaft of the test bearing 55 (i.e., the installation section 62 of the transition shaft assembly) will also be snapped in place in the circular through hole.

[0085] In this embodiment, each suspension assembly 40 and each tension sensor 46 are connected by a ball joint. The ball joint includes a spherical shell and a sphere. In this embodiment, the shape of the spherical shell is cylindrical. The spherical shell is fixedly connected to the tension sensor 46, and the sphere is fixedly connected to the outer shell 52 of the suspension assembly 40.

[0086] In order to avoid the situation that the flexible member 47 needs to pull the suspension assembly 40 when not testing, a support platform 53 is provided below the suspension assembly 40 in this embodiment, and a limiting groove matching the bottom shape of the suspension assembly 40 is provided on the top surface of the support platform 53. Since the suspension assembly 40 in this embodiment is spherical, the limiting groove in this embodiment is also a curved groove, as shown in FIG. Fig.25 shown.

[0087] In this embodiment, a support base 57 is further installed at the bottom of the support platform 53, and a bottom frame 42 is further installed below the support base 57. In this embodiment, a bottom frame 42 is also installed at the bottom of each lifting mechanism 41, and the first telescopic cylinder 44 and the second telescopic cylinder 43 are both installed on the same bottom frame 42. In this embodiment, the bottom frame 42 serves as a basic base.

[0088] It should be noted that, in actual working conditions, the direction of gravity on the bearing remains unchanged. In order to make the simulation test process more in line with the actual working conditions, it is necessary to ensure that the force effect applied to the test bearing should always be in the vertical direction. In this embodiment, since the suspension assembly 40 applies dynamic loading through four flexible parts 47, when the suspension assembly 40 performs swing detection, the four flexible parts 47 will be dynamically adjusted. Since the gravity direction of the suspension assembly remains unchanged, the direction of the dynamic loading resultant force of the four flexible parts 47 is always vertically upward, thereby achieving the effect of controlling the direction of the loading resultant force vector, and realizing the detection of the fatigue, life and other performance of the bearing under the dynamic swing test environment.

[0089] like Figure 26 to Figure 28 As shown, in this embodiment, the transition shaft assembly includes a central shaft 61, a transition sleeve 64 and a transition housing arranged in sequence from the inside to the outside. The central shaft 61 is longer than the transition sleeve 64 and the transition housing. The central shaft 61 can be divided into a support section 63 and a mounting section 62, wherein the transition sleeve 64 and the transition housing are sleeved on the outer peripheral side of the support section 63, and the mounting section 62 is used to sleeve and fix the test bearing 55. In this embodiment, one side of the support section 63 faces the motor drive device 58. In this embodiment, a through hole for the transition sleeve 64 to pass through is provided in the transition housing, and one end of the transition sleeve 64 is connected and fixed to the transition housing through a flange structure. In this embodiment, two groups of transition bearing groups are installed between the support section 63 and the transition sleeve 64, each group includes two transition bearings 65, and the transition bearing 65 is specifically a radial thrust ball bearing. In this embodiment, the two transition bearing groups are respectively installed at both ends of the support section 63. In this embodiment, a bearing spacer is arranged between two transition bearings 65 in the same group, and the bearing spacer includes an inner bearing spacer and an outer bearing spacer which are sleeved together; a middle inner spacer and a middle outer spacer are installed between the two transition bearing groups, wherein the middle inner spacer is sleeved between the support section 63 and the middle outer spacer, and the middle outer spacer is sleeved between the middle inner spacer and the transition sleeve 64. In this embodiment, a front stopper and a rear stopper are also arranged at both ends of the support section 63, and the front stopper and the rear stopper clamp the two transition bearing groups, the middle inner spacer, and the middle outer spacer in the middle. In this embodiment, a circular nut and a rear end cover are also installed in sequence on the rear side of the rear stopper, and a front end cover is also installed on the front side of the front stopper, and the front end cover and the rear end cover are both connected and fixed to the front and rear end surfaces of the transition sleeve 64 through a flange structure, and a through hole for the central shaft 61 to pass through is also arranged in the front end cover and the rear end cover. In this embodiment, the center shaft 61 is connected to the main shaft transmission of the motor drive device 58. During the experiment, the motor drive device 58 will drive the center shaft 61 to rotate, while the transition sleeve 64 covered on the outside of the center shaft 61 does not rotate. The setting of the parts on the outside of the support section 63 mainly plays a supporting role, avoiding the situation where the center shaft 61 has a large overhang.

[0090] In this embodiment, the mounting section 62 of the central shaft 61 is in a cantilevered state, and an end support is provided at the end of the mounting section 62. The end support is mainly used to support the end of the central shaft 61. In this embodiment, the end support includes an end support shaft 601 and an end support seat 60. In this embodiment, one end of the end support shaft 601 is connected to the end of the central shaft 61 by transmission, and the other end is rotatably assembled with the end support seat 60. The top of the end bearing seat is provided with a long hole for the end of the end support shaft 601 to be inserted. The long hole is a blind hole. A cylindrical roller bearing 602 is provided between the end support shaft 601 and the hole wall of the long hole. A bearing pressure cover and a bearing end cover are also provided on the end support shaft 601. The bearing pressure cover and the bearing end cover are located on both sides of the cylindrical roller bearing 602 and clamp the cylindrical roller bearing 602 in the middle. In this embodiment, a through hole for the end support shaft 601 to pass through is provided on the bearing end cover, and the bearing end cover is fixed at the hole position of the long hole. In this embodiment, relative sliding can occur between the long hole and the end support shaft 601. In order to facilitate the position adjustment of the end support seat 60, a screw mechanism 59 is installed between the end support seat 60 and the swing platform in this embodiment. In this embodiment, a padding plate 56 is installed on the swing platform, and the end support seat 60 and the motor drive device 58 are both installed on the padding plate 56. In this embodiment, the support platform and the support platform seat 57 are also installed on the padding plate 56, and the support platform is located directly below the suspension assembly 40. In this embodiment, the end support seat 60 is guided and slidably assembled on the padding plate 56, and the screw mechanism 59 is installed between the end support seat 60 and the padding plate 56.

[0091] The screw mechanism 59 includes a screw and a nut member spirally assembled on the screw. The nut member is fixedly mounted on the corresponding structure. The movement of the nut member can be achieved by rotating the screw, thereby driving the corresponding structure to move. In this embodiment, the end support seat 60 is equivalent to the nut member. A threaded hole is provided at the bottom of the end support seat 60. A screw is threadedly assembled in the threaded hole. The screw can only rotate. The movement drive of the end support seat 60 can be achieved by rotating the screw. In this embodiment, the screw of the screw mechanism 59 is arranged parallel to the central axis 61 of the transition shaft assembly. In this embodiment, the end support seat 60 can adjust its position according to the size of the experimental bearing by rotating the screw. In addition, the setting of the end support in this embodiment can also avoid the problem of large radial deformation of the central axis 61 to a certain extent.

[0092] In this embodiment, the motor drive device 58 is a driving motor. In this embodiment, the transition shaft assembly is connected to the main shaft of the motor drive device 58 by transmission, and the connection method is specifically a coupling connection, so that the rotation drive of the transition shaft assembly can be realized by the rotation of the motor drive device 58. In order to ensure the smooth driving of the motor drive device 58 and facilitate the installation and fixation of the motor drive device 58, in this embodiment, an electric spindle seat is also installed on the pad plate 56, and the electric spindle seat is assembled from two semi-circular arc structures, and the electric spindle is clamped and fixed between the two semi-circular arc structures. In this embodiment, a coupling cover is also provided at the connection position between the motor drive device 58 and the transition shaft assembly, and the coupling cover is provided on the outside of the coupling, thereby playing a role of isolation and protection.

[0093] The working process of the present invention is as follows: when a bearing swing test is required, the test bearing 55 is first sleeved on the mounting section 62 of the central shaft 61, and then the test bearing 55 and the mounting section 62 are installed in the slot structure 51 of the suspension assembly 40. Then, by adjusting the telescopic amount of the first telescopic cylinder 44 and the second telescopic cylinder 43 of each lifting mechanism 41, the tension applied by the corresponding flexible member 47 can be adjusted, thereby adjusting the loading force of the test bearing 55. During the test, the flexible loading device 66 and the motor drive device 58 are both pre-installed on the padding plate 56 on the swing platform, and then the angle of the swing platform is adjusted by the second drive mechanism and the swing platform is fixed at the tilt angle by the brake mechanism. Finally, the motor drive device 58 is started and the reciprocating motion of each servo telescopic cylinder is used to realize the horizontal and vertical swing test of the loaded test bearing 55. In the above test process, the first Hooke's joint + servo telescopic cylinder + ball pair constitutes a redundant constraint, and the second Hooke's joint of the intermediate auxiliary support will constrain the remaining four degrees of freedom.

[0094] The present invention provides a cantilever bearing swing test bench, which has the following advantages compared to the prior art: by adopting the cantilever bearing swing test bench of the present invention, when testing is required, the loading of the set orientation of the suspension assembly 40 is realized by adjusting the telescopic amount of the first telescopic cylinder 44 and the second telescopic cylinder 43 in each lifting mechanism 41, and after the adjustment is completed, the second driving mechanism is started to adjust the swing platform to the set inclination angle, and then the motor driving device 58 is started, at this time, the central axis 61 in the test bearing 55 will rotate, and finally the swing drive of the test bench can be realized by adjusting the telescopic amount of each servo telescopic cylinder under the test bench, thereby realizing the simulation detection of the test bearing 55 constantly changing in orientation after the load is applied. In addition, since the angle of the swing platform in the present invention can be adjusted, the test bearing 55 can be adjusted to the set inclination angle by adjusting the swing platform first during the test, and then the horizontal and vertical swing can be simulated, so the cantilever bearing swing test bench of the present invention can also simulate the situation of horizontal and vertical swing again under complex inclination angles.

[0095] When the swing test frame of the present invention is in use, the first driving mechanism of the swing test frame drives the base to rotate, and the base drives the test platform to achieve bow swing; the first Hooke's joint + servo telescopic cylinder + ball joint form redundant constraints, and the second Hooke's joint of the middle auxiliary support is used to constrain the remaining four degrees of freedom, and the reciprocating motion of the servo telescopic cylinder drives the test dynamic platform to achieve roll and pitch. By adjusting the tilt angle of the swing platform, the use scenario of marine equipment in a tilted state is simulated.

[0096] During use, the two ends of the flexible traction mechanism are respectively connected and fixed to the test bench. The flexible traction mechanism can play the role of suspending the test bench when the servo telescopic rod fails, thereby ensuring the safety of the test. In addition, since the flexible traction mechanism can be flexibly bent and can slide relative to the gantry bracket, when the test bench swings, the flexible traction mechanism will slide with the swing of the test bench, thereby avoiding the influence of the flexible traction mechanism on the swing test.

[0097] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A cantilever bearing swing test bench, characterized in that: The test device comprises a bottom plate, on which a base is rotatably mounted, and a first driving mechanism for driving the base to rotate is provided on the base. The test device also comprises a test bench located on the upper side of the base, and the four corners of the test bench are respectively connected to the base through a servo telescopic cylinder, the upper end of the servo telescopic cylinder is connected to the test bench ball joint, and the lower end of the servo telescopic cylinder is connected to the base through a universal joint. The test device also comprises an auxiliary support for constraining the test bench, the lower end of the auxiliary support is fixedly connected to the base, and the upper end is connected to the test bench. The test bench comprises a frame and a swinging platform rotatably mounted in the frame, the rotation axis of the swinging platform extends in the front-rear direction, and the frame is provided with a second driving mechanism for driving the swinging platform to rotate and a braking mechanism for braking the swinging platform; a flexible loading device and a motor are installed on the swinging platform A driving device, a transition shaft assembly is transmission-connected between the motor driving device and the flexible loading device, the flexible loading device includes a suspension assembly and a plurality of lifting mechanisms spaced apart along the outer circumference of the suspension assembly; a slot structure for assembling the test bearing and the transition shaft assembly is provided in the suspension assembly, the lifting mechanism includes a flexible part, a first telescopic cylinder and a second telescopic cylinder, one end of the flexible part is connected to the driving end of the first telescopic cylinder, and the other end is used to connect to the suspension assembly, the driving end of the second telescopic cylinder faces upward and is supported in the middle of the flexible part; a buffer and a tension sensor are also installed between the flexible part and the suspension assembly or between the flexible part and the first telescopic cylinder; a first pulley assembly for the flexible part to bypass is provided at the driving end of the second telescopic cylinder; a second pulley assembly for the flexible part to bypass is provided on the cylinder wall of the second telescopic cylinder.

2. The cantilever bearing rocking test bench according to claim 1 is characterized in that: The base is also provided with a gantry bracket, on which a flexible traction mechanism is slidably suspended. The flexible traction mechanism includes a traction rope and a rotating assembly structure arranged at both ends of the traction rope. The rotating assembly structure is used for rotational assembly with the test bench. A length adjustment structure is also provided between each rotating assembly structure and the traction rope, and the length adjustment structure is used for adjusting the overall length of the flexible traction mechanism.

3. The cantilever bearing rocking test bench according to claim 2 is characterized in that: The gantry support includes a support beam and support columns fixedly supported at both ends of the support beam, and the flexible traction mechanism includes a transverse traction mechanism arranged parallel to the support beam and a longitudinal traction mechanism arranged perpendicular to the support beam.

4. The cantilever bearing rocking test bench according to claim 1 is characterized in that: The transition shaft assembly includes a central shaft, a transition sleeve and a transition outer shell which are arranged in sequence from the inside to the outside. The central shaft is divided into a supporting section and an installation section. The transition sleeve is arranged on the outside of the supporting section and is fixed to the transition outer shell. The transition outer shell is installed and fixed to the swing platform. A transition bearing is installed between the central shaft and the transition sleeve. The part of the central shaft extending out of the transition sleeve and the transition outer shell constitutes the installation section, and the installation section is used to fit and fix the test bearing.

5. The cantilever bearing rocking test bench according to claim 4 is characterized in that: An end support is provided at the end of the transition shaft assembly, and the end support is arranged at the other end opposite to the motor drive device. The end support includes an end support shaft and an end support seat. One end of the end support shaft is transmission-connected to the central shaft, and the other end is rotatably assembled with the end support seat. A long hole is provided in the end support seat for the end support shaft to be inserted and for the end of the end support shaft to guide and slide.

6. The cantilever bearing rocking test bench according to claim 5 is characterized in that: A raising plate is installed on the swing platform, and the end support seat and the motor drive device are both installed on the raising plate. The end support seat guide slide is assembled on the raising plate, and a screw mechanism for driving the end support seat guide movement is installed between the end support seat and the raising plate. A support platform is also installed on the raising plate, and the support platform is located at the bottom of the suspension assembly. A limiting groove matching the bottom shape of the suspension assembly is provided on the top surface of the support platform.

7. The cantilever bearing rocking test bench according to claim 1 is characterized in that: The auxiliary support comprises a telescopic rod and a support frame arranged at the lower end of the telescopic rod, and the upper end of the telescopic rod is connected to the swing platform through a first Hooke's joint.

8. The cantilever bearing rocking test bench according to claim 1 is characterized in that: The braking mechanism comprises a brake disc and a brake matched with the brake disc, the brake disc is fixedly connected to the rotating shaft of the swing platform, and the brake is installed on a frame.

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