A fretting wear test device for spline pairs

Abstract

The invention discloses a micro-motion wear test device applied to a spline pair, which belongs to the field of vibration wear test equipment, and comprises a base, a motor, a first support plate, a second support plate, a first pedestal, a second pedestal, an axial adjustment component, a radial adjustment component and an angle adjustment component; the radial adjustment component is installed on the base, the axial adjustment component is connected to the radial adjustment component, the first support plate is connected to the axial adjustment component, the first pedestal is installed on the first support plate, the second support plate is rotatably connected to the base, the second pedestal is installed on the second support plate, and the angle adjustment component is installed on the base and connected to the second support plate; the first pedestal is used for installing a spline shaft, the second pedestal is used for installing a spline sleeve, the spline shaft and the spline sleeve are plug-in matched, the motor is installed on the second support plate and is transmission-connected to the spline sleeve, thereby improving the application scope of the test device.

Description

Technical Field

[0001] The invention belongs to the technical field of vibration wear testing equipment, and in particular relates to a fretting wear testing device applied to a spline pair. Background Art

[0002] Spline pair is a commonly used mechanical transmission connection component, widely used in a variety of rotating mechanical systems. The common spline pair consists of a spline shaft and a spline sleeve. The spline shaft is provided with an external spline, and the spline sleeve is provided with an internal spline. The external spline and the internal spline are inserted and matched, so that the spline shaft and the spline sleeve can rotate synchronously.

[0003] Usually, during the actual processing, manufacturing, installation and matching of spline pairs, errors such as processing errors and installation errors are inevitable. When there is an error between the spline shaft and the spline sleeve or the spline pair has been used for a long time, various misalignments such as parallel misalignment, axial floating and angular misalignment will occur between the spline shaft and the spline sleeve. When the spline shaft and the spline sleeve cannot be aligned, there will be micro-wear and stress loads between the outer splines of the spline shaft and the inner splines of the spline sleeve, resulting in a reduction in the service life of the spline pair.

[0004] In order to improve the service life of the spline pair, it is usually necessary to use a wear test device to test and analyze the micro-motion wear between the spline shaft and the spline sleeve. The current common wear test device is composed of a machine and a motor. Two bases are provided on the machine, and the two bases are respectively installed with the spline shaft and the spline sleeve. The motor is used to drive the spline shaft and the spline sleeve to rotate. By adjusting the distance between the two bases, the axial floating misalignment condition can be simulated. By measuring the deformation and wear between the spline shaft and the spline sleeve, the wear analysis between the spline shaft and the spline sleeve can be realized. However, when using this device to adjust the distance between the two bases, the base needs to be disassembled and assembled many times, which makes the device inconvenient to test, and the device cannot simultaneously simulate multiple misalignment conditions such as parallel misalignment, axial floating and angular misalignment, resulting in a limited scope of application of the device. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a fretting wear test device applied to a spline pair. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0006] The present invention provides a fretting wear test device applied to a spline pair, comprising a base, a motor, a first support plate, a second support plate, a first pedestal, a second pedestal, an axial adjustment component, a radial adjustment component and an angle adjustment component;

[0007] The radial adjustment assembly is mounted on the base, the axial adjustment assembly is connected to the radial adjustment assembly, the first support plate is connected to the axial adjustment assembly, the first base is mounted on the first support plate, the second support plate is rotatably connected to the base, the second base is mounted on the second support plate, and the angle adjustment assembly is mounted on the base and connected to the second support plate;

[0008] The first base is used to install the spline shaft, the second base is used to install the spline sleeve, the spline shaft and the spline sleeve are plug-fitted, and the motor is installed on the second support plate and is in transmission connection with the spline sleeve;

[0009] The radial adjustment assembly is used to drive the axial adjustment assembly to move radially along the spline shaft, the axial adjustment assembly is used to drive the first support plate to move axially along the spline shaft, and the angle adjustment assembly is used to drive the second support plate to rotate relative to the base to adjust the angle between the axis of the spline shaft and the axis of the spline sleeve.

[0010] In one embodiment of the present invention, a rotating assembly is provided between the second support plate and the base, the rotating assembly includes a first bearing, a top plate, a connecting shaft, a bottom plate and an angle sensor, the first bearing includes an inner ring and an outer ring, a first through hole is provided on the second support plate, a second through hole is provided on the base, and the axis of the first bearing, the axis of the first through hole and the axis of the second through hole are collinear;

[0011] The first bearing is sandwiched between the second support plate and the base, the outer ring of the first bearing is fixedly connected to the second support plate, and the inner ring of the first bearing is fixedly connected to the base;

[0012] The top plate is fixed to a side surface of the second support plate away from the first bearing, the bottom plate is fixed to a side surface of the base away from the first bearing, the angle sensor is mounted on the bottom plate, a third through hole is provided on the bottom plate, one end of the connecting shaft is fixedly connected to the top plate, and the other end passes through the first through hole, the second through hole and the third through hole in sequence to be connected to the angle sensor, and the axis of the connecting shaft is collinear with the axis of the first bearing;

[0013] The rotating assembly is located below the splined hub.

[0014] In one embodiment of the present invention, the angle adjustment assembly includes a first rod, a first fisheye spherical bearing, a threaded connector, a second rod, and a second fisheye spherical bearing;

[0015] The first fisheye spherical bearing comprises a first outer ring, a first cross bar and a first inner ring, the first outer ring and the first cross bar are fixedly connected, the first inner ring is sleeved in the first outer ring, the first rod is inserted in the first inner ring and is fixedly connected to the base;

[0016] The second fisheye spherical bearing comprises a second outer ring, a second cross bar and a second inner ring, the second outer ring and the second cross bar are fixedly connected, the second inner ring is sleeved in the second outer ring, the second rod is inserted in the second inner ring and is fixedly connected to the second support plate,

[0017] One end of the threaded connector is threadedly connected to the first cross bar, and the other end is threadedly connected to the second cross bar.

[0018] In one embodiment of the present invention, a locking assembly is further included, the locking assembly comprising a locking block and a fastener, the locking block is fixed to the edge of the second support plate, a long hole extending along the width direction of the second support plate is provided on the locking block, the fastener passes through the long hole and is fastened to the base to press the second support plate onto the base;

[0019] There are two groups of locking assemblies, and the two groups of locking assemblies are symmetrically arranged along the width direction of the second support plate. Each group of locking assemblies includes a plurality of locking blocks and a plurality of fasteners arranged in sequence along the length direction of the second support plate, and the plurality of fasteners correspond to the plurality of locking blocks one by one;

[0020] A limit block is respectively arranged on both sides along the width direction of the second support plate, the limit block is fixedly connected to the base, and the distance between the two limit blocks is greater than the width of the second support plate.

[0021] In one embodiment of the present invention, the base comprises a base, a ground rail, a first pressing plate and a second pressing plate, the base comprises an upper plate, a first side plate, a second side plate, a first lower plate and a second lower plate, the first side plate and the second side plate are arranged on both sides of the upper plate, the upper end of the first side plate is connected to the upper plate, the lower end of the first side plate is connected to the first lower plate, the upper end of the second side plate is connected to the upper plate, and the lower end of the second side plate is connected to the second lower plate;

[0022] The first pressing plate and the second pressing plate are both fixedly connected to the ground rail, the first lower plate is clamped between the first pressing plate and the ground rail, and the second lower plate is clamped between the second pressing plate and the ground rail;

[0023] The upper plate is provided with a second through hole, and the upper plate is clamped between the first bearing and the bottom plate.

[0024] In one embodiment of the present invention, the first base includes a first annular shell, a first front end cover and a first rear end cover, and the first front end cover and the first rear end cover are detachably connected to both ends of the first annular shell respectively;

[0025] A first transmission shaft and two second bearings are arranged in the first annular housing, one end of the first transmission shaft extends through the first front end cover and is connected to the spline shaft, and the other end of the first transmission shaft extends through the first rear end cover;

[0026] A first annular limiting protrusion is provided in the first annular shell, and two second bearings are both sleeved on the first transmission shaft. One of the two second bearings is clamped between the first front end cover and the first annular limiting protrusion, and the other is clamped between the first rear end cover and the first annular limiting protrusion. The two second bearings are symmetrically arranged.

[0027] In one embodiment of the present invention, it also includes a torque sensor and a magnetic powder brake. A third base and a third transmission shaft are provided on the first support plate. The third transmission shaft is rotatably connected to the third base. One end of the torque sensor is connected to the end of the first transmission shaft, the other end of the torque sensor is connected to one end of the third transmission shaft, and the other end of the third transmission shaft is connected to the magnetic powder brake.

[0028] In one embodiment of the present invention, the second base includes a second annular shell, a second front end cover and a second rear end cover, and the second front end cover and the second rear end cover are detachably connected to both ends of the second annular shell respectively;

[0029] A second transmission shaft and two third bearings are arranged in the second annular housing, one end of the second transmission shaft extends through the second front end cover and is connected to the spline sleeve, and the other end of the second transmission shaft extends through the second rear end cover and is connected to the motor transmission;

[0030] A second annular limiting protrusion is provided in the second annular shell, and two third bearings are both sleeved on the second transmission shaft. One of the two third bearings is clamped between the second front end cover and the second annular limiting protrusion, and the other is clamped between the second rear end cover and the second annular limiting protrusion. The two third bearings are symmetrically arranged.

[0031] In one embodiment of the present invention, a rotation speed sensor, an acceleration sensor and a temperature sensor are also included. The rotation speed sensor is used to detect the rotation speed of the spline shaft, the acceleration sensor is used to detect the vibration frequency of the spline shaft, and the temperature sensor is used to detect the temperature of the spline shaft.

[0032] In one embodiment of the present invention, a lubrication device and a controller are also included. The lubrication device includes a detachably connected upper shell and a lower shell. The upper shell and the lower shell together enclose a lubrication cavity. The spline shaft is provided with an external spline. The spline sleeve is provided with an internal spline. The external spline and the internal spline are plug-fitted. The external spline and the internal spline are located in the lubrication cavity. The upper shell is provided with an upper oil hole. The lower shell is provided with a lower oil hole. Both the upper oil hole and the lower oil hole are communicated with the lubrication cavity. Both the upper oil hole and the lower oil hole are connected to an external oil supply system.

[0033] The speed sensor, the acceleration sensor, the temperature sensor and the external oil supply system are all connected to the controller, and the controller is used to control the oil supply rate of the external oil supply system based on the detection results of the speed sensor, the acceleration sensor and the temperature sensor.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] In the above scheme of the present application, the test device includes a base, a motor, a first support plate, a second support plate, a first base, a second base, an axial adjustment assembly, a radial adjustment assembly and an angle adjustment assembly; the radial adjustment assembly is installed on the base, the axial adjustment assembly is connected to the radial adjustment assembly, the first support plate is connected to the axial adjustment assembly, the first base is installed on the first support plate, the second support plate and the base are rotatably connected, the second base is installed on the second support plate, and the angle adjustment assembly is installed on the base and connected to the second support plate; the first base is used to install the spline shaft, the second base is used to install the spline sleeve, the spline shaft and the spline sleeve are plug-in matched, the motor is installed on the second support plate and is transmission connected to the spline sleeve; the radial adjustment assembly is used to drive the axial adjustment assembly to move radially along the spline shaft, the axial adjustment assembly is used to drive the first support plate to move axially along the spline shaft, and the angle adjustment assembly is used to drive the second support plate to rotate relative to the base to adjust the angle between the axis of the spline shaft and the axis of the spline sleeve. With this structure, the axial adjustment component can drive the first support plate to move axially along the spline shaft, thereby adjusting the spacing between the first base and the second base, so that the test device can simulate the working condition of axial floating misalignment, the radial adjustment component can drive the axial adjustment component to move radially along the spline shaft, thereby driving the first support plate and the first base to move radially along the spline shaft, so that the test device can simulate the working condition of parallel misalignment, and the angle adjustment component can drive the second support plate to rotate relative to the base, thereby adjusting the angle between the axis of the spline shaft and the axis of the spline sleeve, so that the test device can simulate the working condition of angular misalignment. In this way, the test device does not need to disassemble and assemble the first base and the second base multiple times when performing misalignment adjustment, making it more convenient for the test device to perform tests. In addition, the axial adjustment component, the radial adjustment component and the angle adjustment component can simultaneously simulate various misalignment conditions such as parallel misalignment, axial floating and angular misalignment, thereby improving the scope of application of the test device.

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a three-dimensional schematic diagram of a test device provided in an embodiment of the present invention;

[0038] Figure 2 It is the main view of the test device provided by the embodiment of the present invention. Figure 1 ;

[0039] Figure 3 is a top view of a test device provided by an embodiment of the present invention;

[0040] Figure 4 It is the main view of the test device provided by the embodiment of the present invention. Figure 2 ;

[0041] Figure 5 is a schematic diagram of an axial adjustment component and a radial adjustment component in an embodiment of the present invention;

[0042] Figure 6 is a schematic diagram of a motor, a second support plate, an angle adjustment assembly, a rotating assembly and a base in an embodiment of the present invention;

[0043] Figure 7 is a schematic diagram of an angle adjustment component in an embodiment of the present invention;

[0044] Figure 8 is a schematic diagram of a rotating assembly in an embodiment of the present invention;

[0045] Fig. 9 is an exploded schematic diagram of a rotating assembly in an embodiment of the present invention;

[0046] Fig.10 is a cross-sectional view of a first base, a second base and a rotating assembly in an embodiment of the present invention;

[0047] Fig.11 Schematic diagram of a spline shaft and a spline sleeve in an embodiment of the present invention.

[0048] Figure markings: 1-base, 101-base, 102-ground rail, 2-motor, 3-first support plate, 4-second support plate, 5-first base, 6-second base, 7-axial adjustment assembly, 8-radial adjustment assembly, 9-angle adjustment assembly, 91-first rod, 92-first fisheye spherical bearing, 93-threaded connector, 94-second rod, 95-second fisheye spherical bearing, 10-torque sensor, 11-magnetic powder brake, 12-lubrication device, 13-spline shaft, 14-spline sleeve, 15-rotation assembly, 151-first bearing, 152-top plate, 153-connecting shaft, 154-bottom plate, 155-angle sensor, 16-locking assembly, 17-third base, 18-first transmission shaft, 19-second transmission shaft. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0050] See also Figures 1 to 11The embodiment of the present invention provides a micro-motion wear test device for a spline pair, comprising a base 1, a motor 2, a first support plate 3, a second support plate 4, a first pedestal 5, a second pedestal 6, an axial adjustment component 7, a radial adjustment component 8 and an angle adjustment component 9; the radial adjustment component 8 is mounted on the base 1, the axial adjustment component 7 is connected to the radial adjustment component 8, the first support plate 3 is connected to the axial adjustment component 7, the first pedestal 5 is mounted on the first support plate 3, the second support plate 4 is rotatably connected to the base 1, the second pedestal 6 is mounted on the second support plate 4, and the angle adjustment component 9 is mounted on The base 1 is connected to the second support plate 4; the first base 5 is used to install the spline shaft 13, the second base 6 is used to install the spline sleeve 14, the spline shaft 13 and the spline sleeve 14 are plug-in matched, the motor 2 is installed on the second support plate 4 and is connected to the spline sleeve 14; the radial adjustment component 8 is used to drive the axial adjustment component 7 to move radially along the spline shaft 13, the axial adjustment component 7 is used to drive the first support plate 3 to move axially along the spline shaft 13, and the angle adjustment component 9 is used to drive the second support plate 4 to rotate relative to the base 1 to adjust the angle between the axis of the spline shaft 13 and the axis of the spline sleeve 14.

[0051] In some embodiments of the present application, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the radial adjustment component 8 is a linear drive component used to drive the axial adjustment component 7 to perform linear motion along the radial direction of the spline shaft 13, such as a screw nut mechanism, a gear rack mechanism, etc. Specifically, the radial adjustment component 8 in this embodiment includes a first screw, a first fixed platform and a first slider platform. The first fixed platform is fixedly connected to the base 1, and the slider platform is slidably connected to the fixed platform. The axial adjustment component 7 is arranged on the first slider platform. The first screw is provided with an external thread, and the first sliding platform is provided with a threaded hole. The first screw is inserted into the threaded hole and threadedly matched with the threaded hole. An annular handle is provided at one end of the first screw. By screwing the annular handle, the first sliding platform can be driven to perform linear motion along the radial direction of the spline shaft 13, thereby driving the axial adjustment component 7 to perform linear motion along the radial direction of the spline shaft 13, and then driving the first support plate 3 to perform linear motion along the radial direction of the spline shaft 13 through the axial adjustment component 7.

[0052] In some embodiments of the present application, Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the above-mentioned axial adjustment component 7 is a linear drive component used to drive the first support plate 3 to perform linear motion along the axial direction of the spline shaft 13, such as a screw nut mechanism, a gear rack mechanism, etc. Specifically, the axial adjustment component 7 in this embodiment includes a second screw, a second fixed platform and a second slider platform, the second fixed platform and the first slider platform are fixedly connected, the second slider platform and the second fixed platform are slidably connected, the first support plate 3 and the second sliding platform are fixedly connected, the second screw is provided with an external thread, the second sliding platform is provided with a threaded hole, the second screw is inserted into the threaded hole and threadedly matched with the threaded hole, and one end of the second screw is provided with an annular handle, by screwing the annular handle, the second sliding platform can be driven to perform linear motion along the axial direction of the spline shaft 13, and then the first support plate 3 can be driven to perform linear motion along the axial direction of the spline shaft 13.

[0053] In some embodiments of the present application, a rotation axis is provided between the second support plate 4 and the base 1, and the second support plate 4 and the base 1 rotate relative to the rotation axis. The angle adjustment assembly 9 may also be a linear drive assembly, which applies a force in a first direction to the second support plate 4 through the linear drive assembly, and the first direction is perpendicular to the axis of the rotation axis, so that the linear drive assembly can drive the second support plate 4 to rotate relative to the base 1, thereby adjusting the angle between the axis of the spline shaft 13 and the axis of the spline sleeve 14.

[0054] In some embodiments of the present application, the spline pair is an involute spline pair, and the external splines on the spline shaft 13 and the internal splines on the spline sleeve 14 are both involute splines.

[0055] In the above scheme of the present application, the test device includes a base 1, a motor 2, a first support plate 3, a second support plate 4, a first pedestal 5, a second pedestal 6, an axial adjustment component 7, a radial adjustment component 8 and an angle adjustment component 9; the radial adjustment component 8 is installed on the base 1, the axial adjustment component 7 is connected to the radial adjustment component 8, the first support plate 3 is connected to the axial adjustment component 7, the first pedestal 5 is installed on the first support plate 3, the second support plate 4 is rotatably connected to the base 1, the second pedestal 6 is installed on the second support plate 4, and the angle adjustment component 9 is installed on the base 1 and connected to the second The first support plate 4 is connected; the first base 5 is used to install the spline shaft 13, the second base 6 is used to install the spline sleeve 14, the spline shaft 13 and the spline sleeve 14 are plug-in matched, the motor 2 is installed on the second support plate 4 and is connected to the spline sleeve 14; the radial adjustment component 8 is used to drive the axial adjustment component 7 to move radially along the spline shaft 13, the axial adjustment component 7 is used to drive the first support plate 3 to move axially along the spline shaft 13, and the angle adjustment component 9 is used to drive the second support plate 4 to rotate relative to the base 1 to adjust the angle between the axis of the spline shaft 13 and the axis of the spline sleeve 14. With this structure, the axial adjustment component 7 can drive the first support plate 3 to move axially along the spline shaft 13, thereby adjusting the spacing between the first base 5 and the second base 6, so that the test device can simulate the working condition of axial floating misalignment, the radial adjustment component 8 can drive the axial adjustment component 7 to move radially along the spline shaft 13, thereby driving the first support plate 3 and the first base 5 to move radially along the spline shaft 13, so that the test device can simulate the working condition of parallel misalignment, and the angle adjustment component 9 can drive the second support plate 4 to rotate relative to the base 1, thereby adjusting the angle between the axis of the spline shaft 13 and the axis of the spline sleeve 14, so that the test device can simulate the working condition of angular misalignment. In this way, the test device does not need to disassemble and assemble the first base 5 and the second base 6 multiple times when performing misalignment adjustment, making it more convenient for the test device to perform tests. In addition, the axial adjustment component 7, the radial adjustment component 8 and the angle adjustment component 9 can simultaneously simulate various misalignment conditions such as parallel misalignment, axial floating and angular misalignment, thereby improving the scope of application of the test device.

[0056] In some embodiments of the present application, Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown, a rotating assembly 15 is provided between the second support plate 4 and the base 1, and the rotating assembly 15 includes a first bearing 151, a top plate 152, a connecting shaft 153, a bottom plate 154 and an angle sensor 155. The first bearing 151 includes an inner ring and an outer ring. The second support plate 4 is provided with a first through hole, and the base 1 is provided with a second through hole. The axis of the first bearing 151, the axis of the first through hole and the axis of the second through hole are collinear. The first bearing 151 is sandwiched between the second support plate 4 and the base 1, and the outer ring of the first bearing 151 is fixedly connected to the second support plate 4. The first bearing 151 includes an inner ring and an outer ring. 1 is fixedly connected to the inner ring of the second support plate 4 and the base 1; the top plate 152 is fixed to the side surface of the second support plate 4 away from the first bearing 151, the bottom plate 154 is fixed to the side surface of the base 1 away from the first bearing 151, the angle sensor 155 is installed on the bottom plate 154, and the bottom plate 154 is provided with a third through hole, one end of the connecting shaft 153 is fixedly connected to the top plate 152, and the other end passes through the first through hole, the second through hole and the third through hole in sequence to connect with the angle sensor 155, and the axis of the connecting shaft 153 and the axis of the first bearing 151 are colinear; the rotating assembly 15 is located below the spline sleeve 14. With this structure, the second support plate 4 and the base 1 are connected through the rotating assembly 15, so that the second support plate 4 can rotate relative to the base 1. Since the second support plate 4 can drive the connecting shaft 153 to rotate through the top plate 152 when it rotates, the rotation angle of the connecting shaft 153 can be detected by the angle sensor 155 when the connecting shaft 153 rotates, so that the angle between the axis of the spline shaft 13 and the axis of the spline sleeve 14 can be accurately controlled.

[0057] In some embodiments of the present application, the top plate 152 is a circular plate, and one end of the connecting shaft 153 is fixed to the center of the circular plate.

[0058] In some embodiments of the present application, Figure 6 and Figure 7As shown, the angle adjustment assembly 9 includes a first rod 91, a first fisheye joint bearing 92, a threaded connector 93, a second rod 94 and a second fisheye joint bearing 95; the first fisheye joint bearing 92 includes a first outer ring, a first crossbar and a first inner ring, the first outer ring and the first crossbar are fixedly connected, the first inner ring is sleeved in the first outer ring, the first rod 91 is inserted in the first inner ring and is fixedly connected to the base 1; the second fisheye joint bearing 95 includes a second outer ring, a second crossbar and a second inner ring, the second outer ring and the second crossbar are fixedly connected, the second inner ring is sleeved in the second outer ring, the second rod 94 is inserted in the second inner ring and is fixedly connected to the second support plate 4, one end of the threaded connector 93 is threadedly connected to the first crossbar, and the other end is threadedly connected to the second crossbar. In this way, the distance between the first rod 91 and the second rod 94 can be adjusted by rotating the threaded connector 93, so that the second rod 94 can drive the second support plate 4 to rotate relative to the rotating assembly 15, thereby adjusting the angle between the axis of the spline shaft 13 and the axis of the spline sleeve 14. Among them, due to the height difference between the second support plate 4 and the base 1, when the first rod 91 is installed on the first fisheye joint bearing 92 and the second rod 94 is installed on the second fisheye joint bearing 95, the first cross bar, the threaded connector 93 and the second cross bar can be tilted to adapt to the height difference between the second support plate 4 and the base 1.

[0059] In some embodiments of the present application, the test device further includes a locking assembly 16, the locking assembly 16 includes a locking block and a fastener, the locking block is fixed to the edge of the second support plate 4, the locking block is provided with a long hole extending along the width direction of the second support plate 4, the fastener passes through the long hole and is fastened to the base 1 to press the second support plate 4 onto the base 1; the locking assembly 16 is provided with two groups, the two groups of locking assemblies 16 are symmetrically arranged along the width direction of the second support plate 4, each group of locking assemblies 16 includes a plurality of locking blocks and a plurality of fasteners arranged in sequence along the length direction of the second support plate 4, and the plurality of fasteners and the plurality of locking blocks correspond to each other one by one; a limit block is respectively arranged on both sides along the width direction of the second support plate 4, the limit block is fixedly connected to the base 1, and the spacing between the two limit blocks is greater than the width of the second support plate 4. With this structure, when the second support plate 4 rotates, the locking block can be driven to move, and when the locking block moves, the fastener can move relative to the locking block along the length direction of the long hole. In this way, before and after the second support plate 4 rotates, the second support plate 4 can be fastened to the base 1 by fasteners, thereby improving the running stability of the spline shaft 13 and the spline sleeve 14. In addition, the rotation angle of the second support plate 4 can be limited by the two limit blocks to prevent the second support plate 4 from rotating excessively.

[0060] In some embodiments of the present application, the fastener may be a bolt, and a threaded hole is provided on the base 1 . The bolt and the threaded hole are threadedly connected to fasten the second support plate 4 to the base 1 .

[0061] In some embodiments of the present application, Figures 1 to 4 As shown, the base 1 includes a base 101, a ground rail 102, a first pressing plate and a second pressing plate. The base 101 includes an upper plate, a first side plate, a second side plate, a first lower plate and a second lower plate. The first side plate and the second side plate are arranged on both sides of the upper plate. The upper end of the first side plate is connected to the upper plate, the lower end of the first side plate is connected to the first lower plate, the upper end of the second side plate is connected to the upper plate, and the lower end of the second side plate is connected to the second lower plate. The first pressing plate and the second pressing plate are both fixedly connected to the ground rail 102. The first lower plate is clamped between the first pressing plate and the ground rail 102, and the second lower plate is clamped between the second pressing plate and the ground rail 102. The upper plate is provided with a second through hole, and the upper plate is clamped between the first bearing 151 and the bottom plate 154. With this structure, the stability of the connection between the base 101 and the ground rail 102 can be improved, and the base 101 and the ground rail 102 can be installed and processed more conveniently.

[0062] In some embodiments of the present application, there are multiple first pressing plates and multiple second pressing plates, and the multiple first pressing plates and multiple second pressing plates are arranged in sequence along the length direction of the ground rail 102, and the first pressing plates and the second pressing plates are symmetrically arranged on both sides of the base 101.

[0063] In some embodiments of the present application, Fig.10 As shown, the first base 5 includes a first annular shell, a first front end cover and a first rear end cover, and the first front end cover and the first rear end cover are detachably connected to the two ends of the first annular shell respectively; a first transmission shaft 18 and two second bearings are arranged in the first annular shell, one end of the first transmission shaft 18 extends through the first front end cover and is connected to the spline shaft 13, and the other end of the first transmission shaft 18 extends through the first rear end cover; a first annular limiting protrusion is arranged in the first annular shell, and the two second bearings are sleeved on the first transmission shaft 18, one of the two second bearings is clamped between the first front end cover and the first annular limiting protrusion, and the other is clamped between the first rear end cover and the first annular limiting protrusion, and the two second bearings are symmetrically arranged. With this structure, the stability of the first transmission shaft 18 during movement can be improved, thereby improving the stability of the connection between the spline shaft 13 and the spline sleeve 14, avoiding the displacement of the spline shaft 13 and the spline sleeve 14 during operation, and improving the test accuracy.

[0064] In some embodiments of the present application, Fig.10 and Fig.11As shown, a plurality of first mounting holes are provided on the end surface of the first transmission shaft 18, the spline shaft 13 includes a first flange and a main shaft, one end of the main shaft is fixed to the center of the first flange, a plurality of second mounting holes are provided on the first flange, and the first mounting holes and the second mounting holes are connected by fasteners, so that the stability of the connection between the first transmission shaft 18 and the spline shaft 13 can be improved. A plurality of third mounting holes are provided on the end surface of the second transmission shaft 19, the spline sleeve 14 includes a second flange and a sleeve, one end of the sleeve is fixed to the center of the second flange, a plurality of fourth mounting holes are provided on the second flange, and the third mounting holes and the fourth mounting holes are connected by fasteners, so that the stability of the connection between the second transmission shaft 19 and the spline sleeve 14 can be improved, thereby ensuring the concentricity and accuracy of the spline pair during assembly.

[0065] In some embodiments of the present application, Figures 1 to 4 As shown, the test device also includes a torque sensor 10 and a magnetic powder brake 11. A third base 17 and a third transmission shaft are provided on the first support plate 3. The third transmission shaft is rotatably connected to the third base 17. One end of the torque sensor 10 is connected to the end of the first transmission shaft 18, and the other end of the torque sensor 10 is connected to one end of the third transmission shaft. The other end of the third transmission shaft is connected to the magnetic powder brake 11. With this structure, the torque of the spline pair can be measured by the torque sensor 10, thereby improving the accuracy of the test. Loading can be achieved through the magnetic powder brake 11, so that the operating conditions of the spline pair coupling under complex environments such as high speed and heavy load can be simulated, thereby improving the scope of application of the test device.

[0066] In some embodiments of the present application, the braking torque of the magnetic powder brake 11 can reach 1000 NM, and the magnetic powder brake 11 can be cooled by circulating water during operation.

[0067] In some embodiments of the present application, the second transmission shaft 19 and the output shaft of the motor 2 are connected via a coupling, the first transmission shaft 18 and the torque sensor 10 are connected via a coupling, the third transmission shaft and the torque sensor 10 are connected via a coupling, and the third transmission shaft and the rotating shaft of the magnetic powder brake 11 are connected via a coupling.

[0068] In some embodiments of the present application, Fig.10 and Fig.11As shown, the second base 6 includes a second annular housing, a second front end cover and a second rear end cover, and the second front end cover and the second rear end cover are detachably connected to the two ends of the second annular housing respectively; a second transmission shaft 19 and two third bearings are arranged in the second annular housing, one end of the second transmission shaft 19 extends through the second front end cover and is connected to the spline sleeve 14, and the other end of the second transmission shaft 19 extends through the second rear end cover and is connected to the motor 2; a second annular limiting protrusion is arranged in the second annular housing, and the two third bearings are both sleeved on the second transmission shaft 19, one of the two third bearings is clamped between the second front end cover and the second annular limiting protrusion, and the other is clamped between the second rear end cover and the second annular limiting protrusion, and the two third bearings are symmetrically arranged. With this structure, the stability of the second transmission shaft 19 during movement can be improved, thereby improving the stability of the connection between the spline shaft 13 and the spline sleeve 14, avoiding the displacement of the spline shaft 13 and the spline sleeve 14 during operation, and improving the test accuracy.

[0069] In some embodiments of the present application, the test device further includes a rotation speed sensor, an acceleration sensor and a temperature sensor, wherein the rotation speed sensor is used to detect the rotation speed of the spline shaft 13, the acceleration sensor is used to detect the vibration frequency of the spline shaft 13, and the temperature sensor is used to detect the temperature of the spline shaft 13. With this structure, the rotation speed of the spline shaft 13 is detected by the rotation speed sensor, the vibration frequency of the spline shaft 13 is detected by the acceleration sensor, and the temperature of the spline shaft 13 is detected by the temperature sensor, so that various parameters in the operation process of the spline pair can be accurately collected, thereby further improving the accuracy of the test.

[0070] In some embodiments of the present application, the temperature sensor may be an infrared temperature sensor.

[0071] In some embodiments of the present application, the test device further includes a lubricating device 12 and a controller, the lubricating device 12 includes a detachably connected upper shell and a lower shell, the upper shell and the lower shell together enclose a lubricating cavity, the spline shaft 13 is provided with an external spline, the spline sleeve 14 is provided with an internal spline, the external spline and the internal spline are inserted and matched, the external spline and the internal spline are located in the lubricating cavity, the upper shell is provided with an upper oil hole, the lower shell is provided with a lower oil hole, the upper oil hole and the lower oil hole are both connected to the lubricating cavity, the upper oil hole and the lower oil hole are both connected to the external oil supply system, so that the temperature sensor can realize circulating oil supply through the upper oil hole and the lower oil hole; the speed sensor, the acceleration sensor, the temperature sensor and the external oil supply system are all connected to the controller, and the controller is used to control the oil supply rate of the external oil supply system based on the detection results of the speed sensor, the acceleration sensor and the temperature sensor. Among them, when the spline pair is in a misaligned state and has been running at high speed for a long time, the spline pair will generate a lot of heat and wear, resulting in the normal rotation of the spline pair being affected. When the above structure is adopted, the controller controls the oil supply rate of the external oil supply system based on the detection results of the speed sensor, acceleration sensor and temperature sensor, and can accurately control the flow rate of the lubricating oil in the lubrication chamber, thereby improving the heat dissipation and lubrication effects of the spline pair and ensuring that the spline pair can work normally.

[0072] In the description of the present invention, it should be understood that the terms "center", "axial", "radial", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0073] In addition, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the feature. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0074] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A fretting wear test device for a spline pair, characterized in that: It includes a base, a motor, a first support plate, a second support plate, a first pedestal, a second pedestal, an axial adjustment component, a radial adjustment component and an angle adjustment component; The radial adjustment assembly is mounted on the base, the axial adjustment assembly is connected to the radial adjustment assembly, the first support plate is connected to the axial adjustment assembly, the first base is mounted on the first support plate, the second support plate is rotatably connected to the base, the second base is mounted on the second support plate, and the angle adjustment assembly is mounted on the base and connected to the second support plate; The first base is used to install the spline shaft, the second base is used to install the spline sleeve, the spline shaft and the spline sleeve are plug-fitted, and the motor is installed on the second support plate and is drivingly connected to the spline sleeve; The radial adjustment assembly is used to drive the axial adjustment assembly to move radially along the spline shaft, the axial adjustment assembly is used to drive the first support plate to move axially along the spline shaft, and the angle adjustment assembly is used to drive the second support plate to rotate relative to the base to adjust the angle between the axis of the spline shaft and the axis of the spline sleeve; A rotating assembly is provided between the second support plate and the base, the rotating assembly comprising a first bearing, a top plate, a connecting shaft, a bottom plate and an angle sensor, the first bearing comprising an inner ring and an outer ring, a first through hole is provided on the second support plate, a second through hole is provided on the base, and the axis of the first bearing, the axis of the first through hole and the axis of the second through hole are collinear; The first bearing is sandwiched between the second support plate and the base, the outer ring of the first bearing is fixedly connected to the second support plate, and the inner ring of the first bearing is fixedly connected to the base; The top plate is fixed to a side surface of the second support plate away from the first bearing, the bottom plate is fixed to a side surface of the base away from the first bearing, the angle sensor is mounted on the bottom plate, a third through hole is provided on the bottom plate, one end of the connecting shaft is fixedly connected to the top plate, and the other end passes through the first through hole, the second through hole and the third through hole in sequence to be connected to the angle sensor, and the axis of the connecting shaft is collinear with the axis of the first bearing; The rotating assembly is located below the spline sleeve.

2. The fretting wear test device for spline pairs according to claim 1, characterized in that: The angle adjustment assembly includes a first rod, a first fisheye joint bearing, a threaded connector, a second rod and a second fisheye joint bearing; The first fisheye spherical bearing comprises a first outer ring, a first crossbar and a first inner ring, the first outer ring and the first crossbar are fixedly connected, the first inner ring is sleeved in the first outer ring, the first rod is inserted in the first inner ring and is fixedly connected to the base; The second fisheye spherical bearing comprises a second outer ring, a second cross bar and a second inner ring, the second outer ring and the second cross bar are fixedly connected, the second inner ring is sleeved in the second outer ring, the second rod is inserted in the second inner ring and fixedly connected to the second support plate, One end of the threaded connector is threadedly connected to the first cross bar, and the other end is threadedly connected to the second cross bar.

3. The fretting wear test device for spline pairs according to claim 1, characterized in that: It also includes a locking assembly, which includes a locking block and a fastener, wherein the locking block is fixed to the edge of the second support plate, the locking block is provided with a long hole extending along the width direction of the second support plate, and the fastener passes through the long hole and is fastened to the base to press the second support plate onto the base; The locking assembly is provided with two groups, and the two groups of locking assemblies are symmetrically arranged along the width direction of the second support plate, and each group of the locking assemblies includes a plurality of the locking blocks and a plurality of the fasteners sequentially arranged along the length direction of the second support plate, and the plurality of the fasteners correspond to the plurality of the locking blocks one by one; A limit block is respectively arranged on both sides along the width direction of the second support plate, the limit block is fixedly connected to the base, and the distance between the two limit blocks is greater than the width of the second support plate.

4. The fretting wear test device for spline pairs according to claim 1, characterized in that: The base comprises a base, a ground rail, a first pressing plate and a second pressing plate, the base comprises an upper plate, a first side plate, a second side plate, a first lower plate and a second lower plate, the first side plate and the second side plate are arranged on both sides of the upper plate, the upper end of the first side plate is connected to the upper plate, the lower end of the first side plate is connected to the first lower plate, the upper end of the second side plate is connected to the upper plate, and the lower end of the second side plate is connected to the second lower plate; The first pressing plate and the second pressing plate are both fixedly connected to the ground rail, the first lower plate is clamped between the first pressing plate and the ground rail, and the second lower plate is clamped between the second pressing plate and the ground rail; The upper plate is provided with the second through hole, and the upper plate is clamped between the first bearing and the bottom plate.

5. The fretting wear test device for spline pairs according to claim 1, characterized in that: The first base comprises a first annular shell, a first front end cover and a first rear end cover, wherein the first front end cover and the first rear end cover are detachably connected to two ends of the first annular shell respectively; A first transmission shaft and two second bearings are arranged in the first annular housing, one end of the first transmission shaft extends through the first front end cover and is connected to the spline shaft, and the other end of the first transmission shaft extends through the first rear end cover; A first annular limiting protrusion is provided in the first annular shell, and two second bearings are both sleeved on the first transmission shaft. One of the two second bearings is clamped between the first front end cover and the first annular limiting protrusion, and the other is clamped between the first rear end cover and the first annular limiting protrusion. The two second bearings are symmetrically arranged.

6. The fretting wear test device for spline pairs according to claim 5, characterized in that: It also includes a torque sensor and a magnetic powder brake. A third base and a third transmission shaft are provided on the first support plate. The third transmission shaft is rotatably connected to the third base. One end of the torque sensor is connected to the end of the first transmission shaft, the other end of the torque sensor is connected to one end of the third transmission shaft, and the other end of the third transmission shaft is connected to the magnetic powder brake.

7. The fretting wear test device for spline pairs according to claim 1, characterized in that: The second base comprises a second annular shell, a second front end cover and a second rear end cover, wherein the second front end cover and the second rear end cover are detachably connected to two ends of the second annular shell respectively; A second transmission shaft and two third bearings are arranged in the second annular housing, one end of the second transmission shaft extends through the second front end cover and is connected to the spline sleeve, and the other end of the second transmission shaft extends through the second rear end cover and is transmission-connected to the motor; A second annular limiting protrusion is provided in the second annular housing, and the two third bearings are both sleeved on the second transmission shaft. One of the two third bearings is clamped between the second front end cover and the second annular limiting protrusion, and the other is clamped between the second rear end cover and the second annular limiting protrusion. The two third bearings are symmetrically arranged.

8. The fretting wear test device for spline pairs according to claim 1, characterized in that: It also includes a rotation speed sensor, an acceleration sensor and a temperature sensor. The rotation speed sensor is used to detect the rotation speed of the spline shaft, the acceleration sensor is used to detect the vibration frequency of the spline shaft, and the temperature sensor is used to detect the temperature of the spline shaft.

9. The fretting wear test device for spline pairs according to claim 8, characterized in that: It also includes a lubrication device and a controller, wherein the lubrication device includes a detachably connected upper shell and a lower shell, wherein the upper shell and the lower shell together enclose a lubrication cavity, wherein the spline shaft is provided with an external spline, wherein the spline sleeve is provided with an internal spline, wherein the external spline and the internal spline are plug-fitted, wherein the external spline and the internal spline are located in the lubrication cavity, wherein an upper oil hole is provided on the upper shell, wherein a lower oil hole is provided on the lower shell, wherein the upper oil hole and the lower oil hole are both communicated with the lubrication cavity, and wherein the upper oil hole and the lower oil hole are both connected with an external oil supply system; The rotation speed sensor, acceleration sensor, temperature sensor and external oil supply system are all connected to the controller, and the controller is used to control the oil supply rate of the external oil supply system based on the detection results of the rotation speed sensor, acceleration sensor and temperature sensor.

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