Hot oil wear test apparatus for rolling friction sleeve of electronic disconnector

Abstract

The application discloses a hot oil abrasion test equipment for a rolling friction sleeve of an electronic disconnector, which comprises a tool seat, a tool frame and a main shaft shafting, the friction sleeve is detachably connected to the main shaft shafting, an oil bath heating box for placing the friction sleeve is arranged on the tool seat, a driving piece for driving the main shaft shafting to rotate is arranged on the tool frame, a secondary friction assembly for cooperating with the friction sleeve is arranged on the oil bath heating box, a loading structure for providing a controllable loading force to the secondary friction assembly and accurately detecting the micro-abrasion displacement of the secondary friction assembly is arranged on the tool frame, and an eccentric posture adjusting structure for adjusting the relative position and angle of the secondary friction assembly is arranged on the oil bath heating box. The application solves the problem that the prior art lacks a special test equipment for the rolling friction sleeve of the electronic disconnector of a new energy vehicle, so that the high-temperature hot oil lubrication, rotating operation, controllable load and eccentric posture multi-parameter coupling working conditions of the real work cannot be reproduced synchronously.

Description

Technical Field

[0001] This invention relates to the technical field of friction sleeve testing equipment, specifically a hot oil wear testing device for a rolling friction sleeve used in electronic disconnectors. Background Technology

[0002] With the explosive growth of the new energy vehicle industry, vehicle electronic control systems and electromechanical actuators are rapidly iterating and upgrading. As a core actuator in the transmission and shift control systems of new energy vehicles, the reliability of the electronic disconnector (electronic shifter) directly determines the vehicle's driving safety and handling performance. Among these components, the rolling friction sleeve is a key moving friction part within the electronic disconnector that enables shifting and load transmission. During actual vehicle operation, it operates in a high-temperature, hot oil lubrication environment, withstands alternating and steady-state loads, and experiences eccentric deflection during installation and operation. Simultaneously, it must meet the requirements of long lifespan and high stability under high-frequency reciprocating rolling friction. Its friction and wear performance and fatigue life are core verification indicators for the research, development, and quality control of electronic disconnector products.

[0003] Currently, the industry primarily uses assembly-level bench testing or vehicle road testing to verify the performance of rolling friction sleeves in electronic disconnectors, simulating operating conditions along with the electronic disconnector assembly. This verification method has significant drawbacks: firstly, it involves long testing cycles and high costs, making it difficult to achieve large-scale batch verification and failing to keep pace with the short-cycle, rapid-iteration product development rhythm of the new energy vehicle industry; secondly, in assembly-level testing, the operating conditions and failure data of each component are highly coupled, making it impossible to decouple the friction and wear characteristics of the rolling friction sleeve itself, accurately pinpoint the cause of component failure, and provide targeted test data support for product structure optimization.

[0004] While existing general-purpose friction and wear testing equipment can perform basic friction and wear performance testing, it cannot adapt to the specialized structure of the rolling friction sleeve of the electronic disconnector and the actual vehicle operating conditions, resulting in significant application limitations: First, there is no dedicated specimen clamping and operating condition simulation structure, making it impossible to reproduce the actual installation state and fit of the rolling friction sleeve within the electronic disconnector in a 1:1 manner. The test conditions deviate greatly from the actual vehicle operating conditions, limiting the reference value of the test data. Second, it cannot achieve synchronous coupling control of multiple parameters such as high-temperature hot oil lubrication, rotational operation, controllable load, and eccentric attitude adjustment, making it difficult to reproduce the complex coupling conditions of the rolling friction sleeve in actual vehicle operation and unable to complete performance and life verification in all scenarios. Third, for the micron-level micro-wear of the rolling friction sleeve, general-purpose equipment lacks a corresponding high-precision detection structure, making it impossible to accurately capture the micro-wear displacement of the specimen. The test data has high dispersion and poor repeatability, failing to meet the needs of refined product verification. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a hot oil wear test device for rolling friction sleeves used in electronic disconnectors. This device solves the problem that the lack of dedicated test equipment for rolling friction sleeves adapted to electronic disconnectors in new energy vehicles makes it impossible to simultaneously reproduce the multi-parameter coupling conditions of high-temperature hot oil lubrication, rotational operation, controllable load, and eccentric attitude during actual operation.

[0006] To achieve the above objectives, the present invention provides a hot oil wear testing device for a rolling friction sleeve of an electronic disconnector, comprising a fixture base, a fixture frame, and a spindle system. A friction sleeve is detachably connected to the spindle system. The fixture base is equipped with an oil bath heating chamber for inserting the friction sleeve and simulating the actual high-temperature hot oil lubrication environment of the friction sleeve. The fixture frame is equipped with a drive component for driving the spindle system to simulate the actual operating conditions of the friction sleeve. The oil bath heating chamber is equipped with a secondary friction assembly for cooperating with the friction sleeve to simulate the true friction conditions of the friction sleeve during operation. The fixture frame is equipped with a loading structure for providing a controllable loading force to the secondary friction assembly and accurately detecting the micro-wear displacement of the secondary friction assembly to simulate the true load conditions of the friction sleeve. The oil bath heating chamber is equipped with an eccentricity adjustment structure for adjusting the relative position and angle of the secondary friction assembly to simulate the eccentricity and eccentricity attitude conditions of the friction sleeve during actual operation.

[0007] The advantages of adopting the above technical solution are as follows: The tooling base and tooling frame provide high-rigidity and stable support for the entire machine, ensuring the consistency of the installation benchmarks of each module and the stability of the testing process. The main shaft system allows for detachable clamping of the friction sleeve, facilitating rapid replacement of multiple batches of test pieces. The oil bath heating chamber accurately simulates the high-temperature hot oil lubrication environment of the friction sleeve during actual vehicle operation, while the drive component stably reproduces the actual rotational operating conditions of the friction sleeve. The auxiliary friction assembly, in conjunction with the friction sleeve, constructs a rolling friction condition consistent with the actual vehicle operating conditions. The loading structure provides controllable loading force to the auxiliary friction assembly and accurately detects its micro-wear displacement, thereby reproducing the true load-bearing conditions of the friction sleeve. Furthermore, the eccentric attitude adjustment structure allows for flexible adjustment. The relative position and angle of the secondary friction components are used to simulate the eccentricity and eccentric attitude of the friction sleeve during actual vehicle operation. By setting up the above technology, the synchronous reproduction of multi-parameter coupled conditions can be achieved, which greatly improves the consistency between test data and actual vehicle conditions. This provides accurate and reliable special test data support for the verification of the friction and wear performance, fatigue life testing and structural optimization of the rolling friction sleeve, filling the technical gap of such special test equipment in the industry. In this way, a special test equipment adapted to the rolling friction sleeve of the electronic disconnector of new energy vehicles can be constructed to realize the independent special verification of the rolling friction sleeve, decouple the multi-component data coupling problem of assembly-level testing, greatly shorten the test cycle, reduce the verification cost, and adapt to the short cycle and rapid iteration development rhythm of new energy vehicle products.

[0008] The invention further comprises: an oil bath heating box having an oil bath cavity along its height direction, the oil bath cavity being filled with a lubricating medium; the oil bath cavity being connected to the top of the oil bath heating box and forming an oil bath inlet; an end cap being provided on the oil bath heating box for covering the oil bath inlet; the main shaft system including a coaxially arranged transmission shaft and a main shaft sleeve; a transmission hole coaxially provided on the end cap for the transmission shaft to pass through; a friction sleeve being detachably connected to the main shaft sleeve and fitted onto the outer peripheral wall of the main shaft sleeve; the main shaft sleeve being detachably connected to the transmission shaft; the friction sleeve being disposed within the oil bath cavity; and the driving component including a servo motor; the output end of the servo motor being perpendicularly arranged to the tooling base, and a coupling coaxially connecting the output end of the servo motor to the transmission shaft.

[0009] The advantages of adopting the above technical solution are: the oil bath chamber of the oil bath heating box and the lubricating medium inside it provide a closed and stable hot oil lubrication environment for the friction sleeve, ensuring that the lubrication state during the friction sleeve test is completely consistent with the actual vehicle working conditions; the cooperation between the oil bath port and the end cover achieves the sealing and protection of the oil bath chamber, preventing the leakage of lubricating medium and heat loss, while providing stable installation support for the internal transmission and clamping components; the coaxially arranged transmission shaft and main shaft sleeve constitute a detachable main shaft system, realizing the rapid disassembly and replacement of the friction sleeve, greatly improving the efficiency of test preparation, and adapting to multiple batches. The large-sample batch testing requirements, along with the transmission hole on the end cap ensuring coaxial insertion of the transmission shaft and preventing radial runout deviation during transmission, are addressed. The aforementioned servo motor is coaxially connected to the transmission shaft via a coupling, enabling precise control of the transmission shaft's speed and torque. This stably replicates the rotational operation of the friction sleeve in a real vehicle, ensuring the stability and control accuracy of the transmission process. Furthermore, the friction sleeve is positioned within an oil bath chamber, ensuring it remains in a simulated high-temperature hot oil lubrication environment throughout the process. This further enhances the fidelity of the test conditions and the reliability of the test data, providing a stable and consistent environmental foundation for the performance verification of the friction sleeve.

[0010] The invention further comprises: two transfer rods movably disposed on the end cap; the secondary friction assembly includes two friction pairs, the two transfer rods corresponding one-to-one with the two friction pairs, and the friction pairs being detachably connected to the ends of the transfer rods; a pre-set groove for positioning and engaging the friction pairs is circumferentially formed on the outer peripheral wall of the friction sleeve; the two friction pairs are located around the periphery of the friction sleeve and are both fitted into the pre-set groove; the loading structure includes two loading base plates, the two loading base plates corresponding one-to-one with the two transfer rods, and the two loading base plates being detachably connected to the tooling frame; a loading cylinder is provided at the beginning of each loading base plate and... The output end of the load cylinder is perpendicularly arranged to the load base plate. A hinge joint is provided at the end of the load base plate. A force-position amplifying lever is movably arranged below the load base plate. The starting end of the force-position amplifying lever is perpendicularly connected to the output end of the load cylinder and connected to a rod end joint bearing. The starting end of the force-position amplifying lever is located away from the load cylinder. A fulcrum pin is hinged between the starting end of the force-position amplifying lever and the hinge joint to make the starting end of the force-position amplifying lever swing when the load cylinder drives the end of the force-position amplifying lever to move up and down. The starting end of the force-position amplifying lever cooperates with the load transmission rod to apply a load to the load transmission rod when the force-position amplifying lever is driven by the load cylinder.

[0011] The advantages of adopting the above technical solution are as follows: The two load transfer rods movably mounted on the end cap provide stable installation support for the friction pairs. The two friction pairs, in conjunction with the friction sleeve, form a dual-point friction condition simulation, improving the coverage of test conditions and the comprehensiveness of test data. Furthermore, the pre-set groove on the outer peripheral wall of the friction sleeve enables precise positioning and fitting of the friction pairs, thereby limiting axial movement of the friction pairs, avoiding uneven wear during the test, and ensuring the fitting accuracy of the friction pairs and friction sleeve and the stability of the test conditions. In the above technology, the two loading base plates provide a stable installation reference for the entire loading component, while the loading cylinder provides stable... The controllable loading driving force, coupled with the spherical motion of the force-amplifying lever through the rod end joint bearing, eliminates the jamming problem in the transmission process. The hinged joint between the fulcrum pin and the hinge joint forms the fulcrum structure for lever amplification, allowing the force-amplifying lever to simultaneously amplify the output load of the loading cylinder and the micro-wear displacement of the friction pair, improving the control accuracy of the loading force and the detection resolution of the micro-wear. The force-amplifying lever, in conjunction with the load transmission rod, can accurately transmit the controllable load to the friction pair, stably reproducing the load conditions of the friction sleeve in actual vehicle operation, providing a precise and controllable load input and a high-resolution wear detection method for friction and wear performance testing.

[0012] The present invention further comprises: a cantilever force sensor at the beginning of the force amplification lever; a vibration accelerometer at the top of the cantilever force sensor; a spherical loading head and an anti-rotation block for cooperating with the spherical loading head at the detection end of the cantilever force sensor; an insert plate at the bottom of the spherical loading head; a heat dissipation loading rod coaxially cooperating at the beginning of the load transfer rod; a slot for inserting the insert plate at the beginning of the heat dissipation loading rod; and a detachable connection between the insert plate and the slot.

[0013] The advantages of adopting the above technical solution are as follows: The cantilever force sensor can accurately collect real-time loading force values ​​transmitted to the friction pair, providing reliable data support for precise closed-loop control of the test load. Simultaneously, as a component of the force-position amplification lever, it simplifies the overall structure and improves the structural rigidity of the load transmission path. The vibration accelerometer can collect vibration data in real time during the test, accurately capturing changes in the operating state of the friction pair, providing auxiliary data support for real-time judgment of friction and wear conditions and failure early warning. The spherical loading head can adaptively adapt to minute angular deviations during the loading process, mitigating lateral forces generated during lever swing and ensuring stable vertical transmission of the loading force. The anti-rotation block, working in conjunction with it, restricts the rotational freedom of the spherical loading head, preventing load skew and detection data deviation caused by loading head rotation. The detachable connection between the insert plate and the slot on the heat dissipation loading rod enables rapid docking and disassembly of the loading end and the load transmission end, improving test assembly efficiency while ensuring the coaxiality and stability of load transmission, providing a stable and reliable structural foundation for the synchronous detection of load and vibration.

[0014] The present invention further comprises: a cylindrical loading column at the end of the heat dissipation loading rod and a spherical ball head at the end of the loading column; a mating groove at the beginning of the load transfer rod; the radial cross section of the mating groove being V-shaped; and the ball head and the mating groove being in line contact and fitted together.

[0015] The advantages of adopting the above technical solution are as follows: In the above technology, the cylindrical loading column at the end of the heat dissipation loading rod provides stable structural support for the ball head, ensuring the stable downward transmission of the loading force. The spherical ball head at its end can form an adaptive and stable mating structure with the mating groove of the load transfer rod, adapting to the adjustment and change of the position and angle of the load transfer rod, avoiding the problem of load transmission interruption or skew during attitude adjustment. The V-shaped mating groove at the beginning of the load transfer rod can form a line contact-like interlocking fit with the ball head, improving the concentration and stability of load transmission. At the same time, the inclined surfaces on both sides of the V-shaped groove can form radial limit in all directions, avoiding the problem of lateral slippage of the ball head during loading, ensuring the stability of the mating structure. The line contact fit can adapt to the adjustment requirements of different eccentricities and attitude angles, eliminating the problem of jamming during the mating process. At the same time, the mating gap can accommodate the lubricating medium, reducing the wear of the mating surface itself, avoiding the wear of the mating surface from interfering with the detection accuracy of the micro-wear of the friction pair, thereby ensuring the accuracy and reliability of the test data, and providing a stable and adaptive mating basis for load transmission and attitude adjustment.

[0016] The present invention further comprises: movable holes are provided on the end cover corresponding to the positions of the two load transfer rods; the eccentric attitude adjustment structure includes two eccentric sliding sleeves, which are respectively disposed in the two movable holes; the eccentric sliding sleeves are eccentrically provided with eccentric holes for the load transfer rods and the heat dissipation loading rods to pass through; a number of locking bolts are evenly distributed around the eccentric sliding sleeves; the locking bolts are all threadedly connected to the end cover, and the nut end of each locking bolt is pressed against the edge of the top wall of the eccentric sliding sleeve.

[0017] The advantages of adopting the above technical solution are as follows: the movable hole on the end cover provides a stable installation and movement space for the eccentric sliding sleeve, ensuring the smooth execution of the eccentric adjustment action. The two eccentric sliding sleeves can independently adjust the positions of the two sets of load transmission rods and friction pairs, improving the flexibility and adaptability of the test condition adjustment. The eccentric holes on the eccentric sliding sleeve can achieve precise adjustment of the eccentricity of the load transmission rod and friction pair by rotating the eccentric sliding sleeve, replicating different eccentric conditions during the actual vehicle operation of the friction sleeve, and greatly improving the fidelity of the test conditions. The locking bolts evenly distributed around the eccentric sliding sleeve can stably lock the eccentric sliding sleeve after the eccentricity adjustment is completed, preventing the eccentric sliding sleeve from rotating or displacing during the test, ensuring the stability of the eccentric condition during the test. Moreover, the nut end of the locking bolt is pressed against the edge of the top wall of the eccentric sliding sleeve, which can achieve uniform and stable pressing and locking, preventing the eccentric sliding sleeve from tilting during the locking process, ensuring the positional accuracy after adjustment and the repeatability of multiple sets of test data, and providing reliable structural support for the accurate simulation and stable maintenance of eccentric attitude conditions.

[0018] The invention further comprises: the beginning end of the heat dissipation loading rod extends through the eccentric sliding sleeve and has a plurality of heat dissipation fins evenly distributed along the axis of the heat dissipation loading rod; the end cover is provided with a temperature measuring hole for an external temperature measuring device to be placed into the oil bath chamber; the end cover is detachably connected to the top wall of the oil bath heating box with a plurality of main set screws; a plurality of rotating grooves are passed through the edge of the end cover; the plurality of rotating grooves are evenly distributed circumferentially along the edge of the end cover; secondary set screws are movably disposed in the rotating grooves; and the plurality of secondary set screws are detachably connected to the top wall of the oil bath heating box.

[0019] The advantages of adopting the above technical solution are as follows: The numerous heat dissipation fins evenly distributed along the axis of the heat dissipation loading rod can significantly increase the contact area between the rod and the air, enhancing the convective heat dissipation effect, blocking the high temperature of the oil bath chamber from being conducted to the top sensor end, avoiding the decrease in sensor measurement accuracy and damage to components caused by high temperature, and ensuring the accuracy of the detection data and the service life of the sensor; the temperature measuring hole on the end cap allows external temperature measuring equipment to be placed into the oil bath chamber, realizing real-time monitoring and precise control of the lubricating medium temperature, ensuring the stability of high-temperature hot oil lubrication conditions; the main set screw in the above technology enables a stable and detachable connection between the end cap and the oil bath heating box, ensuring the installation strength and coaxiality of the end cap; the rotating grooves evenly distributed around the edge of the end cap, in conjunction with the secondary set screw, can realize the adjustment and locking of the end cap rotation angle, thereby adjusting the circumferential angle of the friction pair, replicating different deflection postures of the friction sleeve in actual vehicle operation, improving the coverage and fidelity of the test conditions, and providing a convenient and reliable structural means for temperature monitoring and posture adjustment.

[0020] The present invention further comprises: a plurality of first adjustment slots are formed on the loading substrate along its opening direction, the plurality of first adjustment slots are arranged along the width direction of the loading substrate, and a plurality of second adjustment slots are formed on the tooling frame corresponding to the positions of the two loading substrates. The opening direction of the second adjustment slots is perpendicular to the opening direction of the first adjustment slots. Each first adjustment slot is detachably connected to its adjacent second adjustment slot with a positioning bolt. Both ends of the positioning bolt are threaded with positioning nuts. The positioning nut at one end of the positioning bolt is pressed against the top wall of the tooling frame, and the positioning nut at the other end of the positioning bolt is pressed against the bottom wall of the loading substrate.

[0021] The advantages of adopting the above technical solution are as follows: The first adjustment slots arranged along the opening direction on the loading substrate cooperate with the second adjustment slots vertically arranged on the tooling frame to form a bidirectional adjustment structure along the X-axis and Y-axis. This allows the loading substrate to move and adjust at any position within the mounting plane of the tooling frame, adapting to the adjustment requirements of different eccentricities and attitude angles of the friction pair, ensuring precise alignment between the loading end and the load transfer end, and improving the adaptability and adjustment flexibility of the equipment. Furthermore, the positioning bolts passing through the mutually cooperating first and second adjustment slots, along with the positioning nuts at both ends, achieve a stable and detachable connection between the loading substrate and the tooling frame. The positioning nuts at both ends can be bidirectionally pressed and locked from the top wall of the tooling frame and the bottom wall of the loading substrate, respectively, preventing displacement or shaking of the loading substrate during loading and ensuring the installation stability of the loading structure and the accuracy of load transfer. The multiple sets of adjustment slots improve the structural strength of the installation connection, adapting to the test requirements of different load conditions, and providing a reliable structural foundation for the fully adjustable and stable installation of the loading module.

[0022] The present invention further includes: the loading structure includes two displacement sensors, each of which corresponds to one of the two loading substrates. The displacement sensors are mounted on a tooling frame. A test shaft is provided at the beginning of the force amplification lever. A notch is provided on the loading substrate corresponding to the position of the test shaft. The test shaft passes through the notch and is configured to cooperate with the displacement sensor.

[0023] The advantages of adopting the above technical solution are as follows: The two displacement sensors are configured one-to-one with the two loading substrates, allowing for independent detection of the micro-wear displacement of the two friction pairs, improving the comprehensiveness and accuracy of the test data. Furthermore, the displacement sensors, mounted on the fixture, provide a stable mounting reference, avoiding detection errors caused by reference wobbling during the testing process, thus ensuring the stability and reliability of the test data. The test shaft at the beginning of the force-position amplification lever accurately transmits the amplified wear displacement to the displacement sensor. Combined with the amplification effect of the force-position amplification lever, this significantly improves the detection resolution of the micron-level micro-wear of the friction pairs, achieving precise capture of micro-wear. The notch on the loading substrate corresponding to the test shaft position provides ample space for the test shaft's lifting and swinging, preventing structural interference between the test shaft and the loading substrate during movement, ensuring smooth execution of the displacement detection action, and not affecting the structural strength and installation stability of the loading substrate. This provides stable and reliable structural support for high-precision detection of micro-wear.

[0024] The present invention further includes: a heating rod for heating the lubricating medium is provided in the oil bath chamber; an oil discharge pipe for communicating with the oil bath chamber is provided at the bottom of the oil bath heating box; and an oil discharge observation window is detachably connected to the outer peripheral wall of the oil bath heating box.

[0025] The advantages of adopting the above technical solution are as follows: The heating rod installed in the oil bath chamber can uniformly heat the lubricating medium, and in conjunction with the external temperature control system, achieve precise adjustment and stable control of the lubricating medium temperature. This accurately simulates different high-temperature conditions during the actual operation of the friction sleeve, improving the fidelity and controllability of the test conditions. The oil drain pipe at the bottom of the oil bath heating chamber connects to the oil bath chamber, enabling rapid replacement of the lubricating medium and precise control of the oil level, improving the ease of operation and maintenance efficiency of the equipment. Simultaneously, it allows for the rapid emptying of the lubricating medium from the oil bath chamber after the test, avoiding equipment corrosion caused by long-term medium retention. The detachable oil drain observation window on the outer wall of the oil bath heating chamber allows for visual observation of the test status inside the oil bath chamber, facilitating real-time monitoring of the operating status of the friction sleeve and friction pair by the operator. The detachable design also facilitates measurement and disassembly of the friction sleeve after the test, improving the convenience and efficiency of the test operation and providing a convenient and reliable structural means for high-temperature condition simulation and equipment maintenance. Attached Figure Description

[0026] Figure 1 This is a three-dimensional view of the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the oil bath heating box and the main shaft system in the present invention. Figure 4 This is a three-dimensional view of the loading structure in this invention; Figure 5 This is a three-dimensional view of the end cap and its mating components in this invention; Figure 6 for Figure 5 A partial sectional view; Figure 7 This is a partial cross-sectional view of the friction sleeve, friction pair, and their linkage components in the present invention. Detailed Implementation

[0027] This invention provides a hot oil wear testing device for a rolling friction sleeve 11 used in an electronic disconnector, comprising a fixture base 1, a fixture frame 2, and a main spindle system. The friction sleeve 11 is detachably connected to the main spindle system. The fixture base 1 is equipped with an oil bath heating chamber 3 for inserting the friction sleeve 11 and simulating the actual high-temperature hot oil lubrication environment of the friction sleeve 11. The fixture frame 2 is equipped with a drive component for driving the main spindle system to simulate the actual operating conditions of the friction sleeve 11. The oil bath heating chamber 3 is equipped with a secondary friction assembly for cooperating with the friction sleeve 11 to simulate the real friction conditions of the friction sleeve 11 during operation. The fixture frame 2 is equipped with a component for providing a controllable loading force to the secondary friction assembly and accurately detecting the micro-wear of the secondary friction assembly. The displacement is simulated by a loading structure that mimics the actual load conditions of the friction sleeve 11. The oil bath heating box 3 is equipped with an eccentricity adjustment structure for adjusting the relative position and angle of the auxiliary friction components to simulate the eccentricity and eccentricity of the friction sleeve 11 during actual operation. The oil bath heating box 3 has an oil bath cavity 31 along its height direction, filled with a lubricating medium. The oil bath cavity 31 connects to the top of the oil bath heating box 3 and forms an oil bath inlet. The oil bath heating box 3 is equipped with an end cap 4 for covering the oil bath inlet. The main shaft system includes a coaxially arranged drive shaft 12 and main shaft sleeve 13. The end cap 4 has a coaxially arranged drive hole 41 for the drive shaft 12 to pass through. The friction sleeve 11 and the main shaft sleeve 13 are detachable. The friction sleeve 11 is fitted onto the outer peripheral wall of the main shaft sleeve 13. The main shaft sleeve 13 is detachably connected to the transmission shaft 12. The friction sleeve 11 is located in the oil bath chamber 31. The driving component includes a servo motor 21. The output end of the servo motor 21 is perpendicular to the tooling base 1 and coaxially connected to the transmission shaft 12 by a coupling. Two transmission rods 42 are movably mounted on the end cover 4. The secondary friction assembly includes two friction pairs 43. The two transmission rods 42 correspond one-to-one with the two friction pairs 43, and the friction pairs 43 are detachably connected to the ends of the transmission rods 42. A pre-set groove 111 for positioning and engaging the friction pairs 43 is circumferentially formed on the outer peripheral wall of the friction sleeve 11. Friction pairs 43 are located around the friction sleeve 11. Both friction pairs 43 are fitted into the preset groove 111. The loading structure includes two loading base plates 5, which are correspondingly arranged with two transfer rods 42. Both loading base plates 5 are detachably connected to the tooling frame 2. A loading cylinder 51 is provided at the beginning of each loading base plate 5, and the output end of the loading cylinder 51 is perpendicular to the loading base plate 5. A hinge joint 52 is provided at the end of each loading base plate 5. A force-position amplifying lever 6 is movably arranged below the loading base plate 5. The beginning of the force-position amplifying lever 6 is perpendicularly connected to the output end of the loading cylinder 51 and connected to a rod end joint bearing 511. The beginning of the force-position amplifying lever 6 is located away from the loading cylinder 51.A pivot pin 521 is hinged between the starting end of the force amplification lever 6 and the hinge joint 52 to allow the starting end of the force amplification lever 6 to swing when the loading cylinder 51 drives the end of the force amplification lever 6 to move up and down. The starting end of the force amplification lever 6 cooperates with the load transmission rod 42 to apply a load to the load transmission rod 42 when the force amplification lever 6 is driven by the loading cylinder 51. A cantilever force sensor 61 is provided at the starting end of the force amplification lever 6. A vibration accelerometer 62 is provided at the top of the cantilever force sensor 61. A spherical loading head 63 and an anti-rotation block 631 for cooperating with the spherical loading head 63 are provided at the detection end of the cantilever force sensor 61. An insert plate 632 is provided at the bottom of the spherical loading head 63. The starting end of the load transmission rod 42 is coaxially fitted with... The device includes a heat dissipation loading rod 44, the beginning of which has a slot 441 for inserting a plate 632. The plate 632 is detachably connected to the slot 441. The end of the heat dissipation loading rod 44 has a cylindrical loading post 442 with a spherical ball head 443 at its end. The beginning of the loading rod 42 has a mating groove 421 with a V-shaped radial cross-section. The ball head 443 is in line contact with the mating groove 421 and fits into it. The end cap 4 has movable holes 45 corresponding to the positions of the two loading rods 42. The eccentric attitude adjustment structure includes two eccentric sliding sleeves 7, which are respectively located on two movable... In the moving hole 45, the eccentric sliding sleeve 7 is eccentrically provided with an eccentric hole 71 for partial passage of the load transfer rod 42 and the heat dissipation loading rod 44. A plurality of locking bolts 72 are evenly distributed around the eccentric sliding sleeve 7. Each locking bolt 72 is threadedly connected to the end cover 4, and the nut end of each locking bolt 72 is pressed against the edge of the top wall of the eccentric sliding sleeve 7. The beginning end of the heat dissipation loading rod 44 extends out of the eccentric sliding sleeve 7, and a plurality of heat dissipation fins 73 are evenly distributed along the axis of the heat dissipation loading rod 44. The end cover 4 is provided with a temperature measuring hole 46 for inserting an external temperature measuring device into the oil bath chamber 31. The end cover 4 is detachably connected to the top wall of the oil bath heating box 3 by a plurality of main set screws 32. A plurality of rotating grooves 47 penetrate the edge of the end cover 4. The grooves 47 are evenly distributed circumferentially along the edge of the end cover 4. A secondary set screw 33 is movably disposed in each of the rotating grooves 47. Several secondary set screws 33 are detachably connected to the top wall of the oil bath heating box 3. Several first adjustment grooves 53 are formed on the loading base plate 5 along its opening direction, and these first adjustment grooves 53 are arranged along the width direction of the loading base plate 5. Several second adjustment grooves 22 are formed on the tooling frame 2 corresponding to the positions of two loading base plates 5. The opening direction of the second adjustment grooves 22 is perpendicular to the opening direction of the first adjustment grooves 53. Each first adjustment groove 53 is detachably connected to its adjacent second adjustment groove 22 by a positioning bolt 221. Both ends of the positioning bolt 221 are threaded with positioning nuts 222.The positioning nut 222 at one end of the positioning bolt 221 is fastened to the top wall of the tooling frame 2, and the positioning nut 222 at the other end of the positioning bolt 221 is fastened to the bottom wall of the loading base plate 5. The loading structure also includes two displacement sensors 23, each corresponding to one of the two loading base plates 5. The displacement sensors 23 are mounted on the tooling frame 2. A test shaft 64 is provided at the beginning of the force amplification lever 6. A notch is provided on the loading base plate 5 corresponding to the position of the test shaft 64. The test shaft 64 passes through the notch and is configured to cooperate with the displacement sensor 23. A heating rod 34 for heating the lubricating medium is provided in the oil bath chamber 31. An oil drain pipe 341 for communicating with the oil bath chamber 31 is provided at the bottom of the oil bath heating box 3. An oil drain observation window 342 is detachably connected to the outer peripheral wall of the oil bath heating box 3.

[0028] Overall Operation Flow of Hot Oil Wear Testing Equipment for Rolling Friction Sleeves of Electronic Disconnectors The overall operation process of this equipment follows the core logic of pre-test preparation → working condition parameter debugging → test start-up and real-time monitoring → test stop → post-processing and data organization. Each step of the operation is precisely adapted to the equipment structure, realizing the standardized and controllable conduct of rolling friction sleeve hot oil wear tests. The specific process is as follows: 1. Pre-test preparation: Detachably connect the friction sleeve to the outer peripheral wall of the main sleeve. Coaxially assemble the main sleeve and the transmission shaft to form the main shaft system. Insert the assembled main shaft system into the oil bath cavity of the oil bath heating box, so that the friction sleeve is completely placed inside the oil bath cavity. Fill the oil bath cavity with the pre-specified lubricating medium. Place the end cap on the oil bath port of the oil bath heating box and initially fix it with the main set screw. Detachably connect the secondary friction assembly to the end of the transmission rod, so that the secondary friction assembly is precisely fitted into the pre-specified groove on the outer peripheral wall of the friction sleeve. Then fit the heat dissipation loading rod into the beginning of the transmission rod to complete the linkage assembly of the heat dissipation loading rod, the transmission rod and the secondary friction assembly. At the same time, initially connect the loading base plate of the loading structure to the tooling frame with the positioning bolts and positioning nuts to complete the docking and cooperation of the force amplification lever, the spherical loading head and the heat dissipation loading rod. Check the reliability of the connection of each component of the equipment to ensure that there is no structural interference or loose clamping.

[0029] 2. Working Parameter Adjustment: First, adjust the eccentric attitude by rotating the eccentric sliding sleeve on the end cover of the oil bath heating chamber and adjusting the relative eccentricity between the load transfer rod and the friction sleeve to the preset test value. Secure the eccentric sliding sleeve by tightening the locking bolts around its periphery. Rotate the end cover according to the test requirements, using the rotation groove on the edge of the end cover to adjust the circumferential angle of the secondary friction assembly, simulating the eccentric attitude of the friction sleeve on a real vehicle. After adjustment, tighten the end cover using the secondary set screws. Then, adjust the position of the loading structure by loosening the positioning bolts and positioning nuts, and adjusting the first adjustment groove of the loading base plate and the second adjustment groove of the tooling frame. Adjust the position and angle of the loading plate on the tooling frame to ensure precise alignment between the loading structure and the load transfer rod. After adjustment, re-tighten the positioning bolts and nuts. Start the heating rod of the oil bath heating chamber to heat the lubricating medium in the oil bath chamber. Monitor the oil temperature in real time through the temperature measuring hole of the end cover in conjunction with an external temperature measuring device, and regulate the oil temperature to the preset high-temperature hot oil working condition value for the test. Finally, preset the parameters of the drive component and the loading structure, set the output speed of the servo motor, and preset the output load threshold of the loading cylinder to complete the debugging and calibration of all working condition parameters before the test.

[0030] 3. Test Start-up and Real-time Monitoring: First, the loading structure is started. The loading cylinder outputs driving force to drive the power position amplification lever to swing around the fulcrum pin shaft. The controllable load is sequentially transferred to the heat dissipation loading rod and the load transfer rod through the cantilever force sensor and the spherical loading head, and finally applied to the secondary friction assembly, so that the secondary friction assembly and the friction sleeve maintain a preset contact pressure. During the test, the cantilever force sensor collects the loading force data in real time, the vibration accelerometer monitors the vibration data of the equipment operation simultaneously, and the displacement sensor captures the micro-wear displacement amplified by the power position amplification lever through the test shaft, realizing the real-time detection of load, vibration, and wear displacement. After the loading force stabilizes, the drive component is started. The servo motor drives the transmission shaft and the main shaft sleeve to rotate coaxially through the coupling, thereby driving the friction sleeve to rotate in the oil bath chamber. The friction sleeve and the secondary friction assembly form rolling friction, replicating the friction, rotation, and high-temperature hot oil lubrication coupling conditions of the friction sleeve in the actual vehicle operation. During the test operation, various test parameters such as oil temperature, servo motor speed, loading force, vibration, and wear displacement are continuously monitored to ensure that all parameters are stable within the preset operating conditions, and parameter change data are recorded in a timely manner.

[0031] 4. Test Stop: When the test runs for the preset duration or the wear displacement reaches the preset test threshold, the test stop procedure is initiated. First, the drive components are shut down, the servo motor stops running, and the friction sleeve stops rotating synchronously with the main shaft system, releasing the rolling friction state between the friction sleeve and the secondary friction component. Then, the loading cylinder is reset, the force amplification lever returns to its initial position, the loading structure completes unloading, and the load applied to the secondary friction component stops. Finally, the heating rod is shut down, stopping the heating of the lubricating medium in the oil bath chamber, allowing the equipment to cool down naturally, avoiding damage to components caused by directly disassembling the test piece under high temperature conditions.

[0032] 5. Post-processing and data processing: After the oil bath heating chamber temperature drops to room temperature, open the oil drain pipe at the bottom of the oil bath heating chamber to completely drain the lubricating medium in the oil bath chamber; disassemble the secondary set screw, main set screw and locking bolt in sequence, remove the end cover and eccentric sliding sleeve, separate the load transfer rod and heat dissipation loading rod, and disassemble the secondary friction assembly and the friction sleeve to be tested; check the internal condition of the oil bath chamber through the oil drain observation window on the outer peripheral wall of the oil bath heating chamber, and perform visual inspection, dimensional measurement and wear analysis on the disassembled friction sleeve and secondary friction assembly; organize the full-dimensional data such as rotational speed, oil temperature, loading force, vibration, and wear displacement collected in real time during the test, and combine the test results to complete the analysis and summary of the test data to form a test report; finally, clean, maintain and reset all parts of the equipment, check the working status of core components such as sensors, loading cylinders, and servo motors, and prepare for subsequent batch tests.

[0033] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A hot oil wear testing device for a rolling friction sleeve used in an electronic disconnector, characterized in that: The device includes a tooling base, a tooling frame, and a spindle system. A friction sleeve is detachably connected to the spindle system. The tooling base is equipped with an oil bath heating chamber for inserting the friction sleeve and simulating the actual high-temperature hot oil lubrication environment of the friction sleeve. The tooling frame is equipped with a drive component for driving the spindle system to simulate the actual operating conditions of the friction sleeve. The oil bath heating chamber is equipped with a secondary friction assembly for cooperating with the friction sleeve to simulate the real friction conditions of the friction sleeve during operation. The tooling frame is equipped with a loading structure for providing controllable loading force to the secondary friction assembly and accurately detecting the micro-wear displacement of the secondary friction assembly to simulate the real load conditions of the friction sleeve. The oil bath heating chamber is equipped with an eccentric attitude adjustment structure for adjusting the relative position and angle of the secondary friction assembly to simulate the eccentricity and eccentric attitude conditions of the friction sleeve during actual operation.

2. The hot oil wear test equipment for the rolling friction sleeve of an electronic disconnector according to claim 1, characterized in that: The oil bath heating box has an oil bath cavity along its height direction, and the oil bath cavity is filled with a lubricating medium. The oil bath cavity is connected to the top of the oil bath heating box and forms an oil bath port. The oil bath heating box is provided with an end cover for covering the oil bath port. The main shaft system includes a drive shaft and a main shaft sleeve arranged coaxially. The end cover has a drive hole for the drive shaft to pass through. The friction sleeve is detachably connected to the main shaft sleeve and is sleeved on the outer peripheral wall of the main shaft sleeve. The main shaft sleeve is detachably connected to the drive shaft. The friction sleeve is located in the oil bath cavity. The driving component includes a servo motor. The output end of the servo motor is arranged perpendicularly to the tooling base and is coaxially connected to the drive shaft with a coupling.

3. The hot oil wear test equipment for the rolling friction sleeve of an electronic disconnector according to claim 2, characterized in that: Two load transfer rods are movably mounted on the end cap. The secondary friction assembly includes two friction pairs. The two load transfer rods correspond one-to-one with the two friction pairs, and the friction pairs are detachably connected to the ends of the load transfer rods. A pre-set groove for positioning and engaging the friction pairs is circumferentially formed on the outer peripheral wall of the friction sleeve. The two friction pairs are located around the periphery of the friction sleeve and are fitted into the pre-set grooves. The loading structure includes two loading base plates. The two loading base plates correspond one-to-one with the two load transfer rods, and the two loading base plates are detachably connected to the tooling frame. A loading cylinder is provided at the beginning of each loading base plate. The output end is perpendicularly arranged to the loading base plate. A hinge joint is provided at the end of the loading base plate. A force-position amplifying lever is movably arranged below the loading base plate. The starting end of the force-position amplifying lever is perpendicularly connected to the output end of the loading cylinder and is connected to a rod end joint bearing. The starting end of the force-position amplifying lever is located away from the loading cylinder. A fulcrum pin is hinged between the starting end of the force-position amplifying lever and the hinge joint to make the starting end of the force-position amplifying lever swing when the loading cylinder drives the end of the force-position amplifying lever to move up and down. The starting end of the force-position amplifying lever cooperates with the load transmission rod to apply a load to the load transmission rod when the force-position amplifying lever is driven by the loading cylinder.

4. The hot oil wear test equipment for the rolling friction sleeve of an electronic disconnector according to claim 3, characterized in that: The force amplification lever is equipped with a cantilever force sensor at its starting end. A vibration accelerometer is installed on the top of the cantilever force sensor. The detection end of the cantilever force sensor is equipped with a spherical loading head and an anti-rotation block for cooperating with the spherical loading head. An insert plate is installed at the bottom of the spherical loading head. A heat dissipation loading rod is coaxially fitted at the starting end of the load transfer rod. A slot for inserting the insert plate is opened at the starting end of the heat dissipation loading rod. The insert plate and the slot are detachably connected.

5. The hot oil wear testing equipment for a rolling friction sleeve for an electronic disconnector according to claim 4, characterized in that: The heat dissipation loading rod has a cylindrical loading column at its end and a spherical ball head at the end of the loading column. The loading rod has a mating groove at its beginning. The radial cross-section of the mating groove is "V". The ball head is in line contact with the mating groove and the ball head is fitted into the mating groove.

6. The hot oil wear testing equipment for a rolling friction sleeve for an electronic disconnector according to claim 5, characterized in that: The end cap has movable holes corresponding to the two load transfer rod positions. The eccentric attitude adjustment structure includes two eccentric sliding sleeves, which are respectively disposed in the two movable holes. The eccentric sliding sleeves are eccentrically provided with eccentric holes for the load transfer rod and the heat dissipation loading rod to pass through. Several locking bolts are evenly distributed around the eccentric sliding sleeves. The locking bolts are threaded to the end cap, and the nut end of each locking bolt is pressed against the edge of the top wall of the eccentric sliding sleeve.

7. The hot oil wear testing equipment for a rolling friction sleeve for an electronic disconnector according to claim 6, characterized in that: The heat dissipation loading rod extends from the eccentric sliding sleeve at its starting end and has several heat dissipation fins evenly distributed along its axial direction. The end cover is provided with a temperature measuring hole for external temperature measuring equipment to be placed into the oil bath chamber. The end cover is detachably connected to the top wall of the oil bath heating box by several main set screws. Several rotating grooves are passed through the edge of the end cover and are evenly distributed circumferentially along the edge of the end cover. Secondary set screws are movably arranged in the rotating grooves and are detachably connected to the top wall of the oil bath heating box.

8. The hot oil wear test equipment for the rolling friction sleeve of an electronic disconnector according to claim 3, characterized in that: The loading substrate has a plurality of first adjustment slots along its opening direction, and the plurality of first adjustment slots are arranged along the width direction of the loading substrate. The tooling frame has a plurality of second adjustment slots at each position corresponding to two loading substrates. The opening direction of the second adjustment slots is perpendicular to the opening direction of the first adjustment slots. Each first adjustment slot is detachably connected to its adjacent second adjustment slot with a positioning bolt. Both ends of the positioning bolt are threaded with positioning nuts. The positioning nut at one end of the positioning bolt is pressed against the top wall of the tooling frame, and the positioning nut at the other end of the positioning bolt is pressed against the bottom wall of the loading substrate.

9. The hot oil wear testing equipment for a rolling friction sleeve for an electronic disconnector according to claim 3, characterized in that: The loading structure also includes two displacement sensors, which correspond one-to-one with two loading substrates. The displacement sensors are mounted on a tooling frame. A test shaft is provided at the beginning of the force amplification lever. A notch is provided on the loading substrate corresponding to the position of the test shaft. The test shaft passes through the notch and is configured to cooperate with the displacement sensor.

10. The hot oil wear testing equipment for a rolling friction sleeve for an electronic disconnector according to claim 1, characterized in that: The oil bath chamber is equipped with a heating rod for heating the lubricating medium, and the bottom of the oil bath heating box is equipped with an oil discharge pipe for communicating with the oil bath chamber. An oil discharge observation window is detachably connected to the outer peripheral wall of the oil bath heating box.

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