Test equipment, test system and test method for gear shifting execution mechanism

Abstract

The invention belongs to the technical field of automobile gear shifting tests, and discloses a gear shifting execution mechanism test device, test system and test method.The gear shifting execution mechanism test device comprises a mounting table, a multifunctional test assembly, a sensor assembly and a gear shifting execution mechanism, and the multifunctional test assembly is arranged on the mounting table; the sensor assemblies are arranged on the multifunctional test assembly, and the gear shifting execution mechanism is connected to the multifunctional test assembly. The device is simple in structure, light in weight and low in cost; the synchronizer load under the actual working condition can be simulated, and the functions of gear shifting force detection, sensor calibration, endurance test, oil way lubrication simulation, automatic test and the like are achieved; the device is suitable for various gear shifting executing mechanisms and is high in compatibility and universality; the gear shifting execution mechanism test system is simple in test method, accurate in test result and good in test effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive shift tests. Specifically, it relates to a shift actuator test device, a test system, and a test method. Background Art

[0002] The shift actuator test plays a crucial role in the automotive manufacturing and R & D processes. Currently, during the development of shift actuators, the test bench relies on hydraulic or servo motor loading systems, with high costs (over 50,000 yuan or even higher for a single device); existing tooling has many limitations, such as lacking sensor calibration functions and oil circuit lubrication simulation functions, high test equipment costs, large weights; it cannot be applied to different shift actuators, with poor versatility. Existing shift actuator test equipment has problems such as poor compatibility and complex test methods, seriously restricting the efficiency and effectiveness of shift actuator tests. Summary of the Invention

[0003] The purpose of the present invention is to provide a shift actuator test device, a test system, and a test method, which have a simple structure, small weight, low cost, and low processing difficulty; can simulate the synchronizer load under actual working conditions, and have functions such as shift force detection, sensor calibration, durability test, oil circuit lubrication simulation, and automated testing, solving the problem of single function testing; at the same time, the device can be applied to various shift actuators, with high compatibility and strong versatility; the test method of the shift actuator test system is simple, the test results are accurate, and the test effect is good.

[0004] The specific solution content is as follows:

[0005] A shift actuator test device includes an installation platform, a multi-functional test component, a sensor component, and a shift actuator. The multi-functional test component is arranged on the installation platform, the sensor component is arranged on the multi-functional test component, and the shift actuator is connected to the multi-functional test component.

[0006] The installation platform of the shift execution mechanism test equipment of the present invention includes a bottom plate, a front plate, side plates and a top plate. The front plate, side plates and top plate are fixed to each other by threads to form a semi-closed accommodation space, and the multi-functional test component is installed on the installation platform. The multi-functional test component includes a shift test piece and a load test piece. The shift test piece includes two bearings, two bearing supports, a shift fork shaft and a shift head guide block. The two bearing supports are fixed horizontally and spaced apart on the bottom plate, and the two bearings are respectively fixedly installed in the two bearing supports. The shift fork shaft passes through the two bearings. The shift head guide block is fixedly connected to the shift fork shaft and is located between the two bearings. The shift execution mechanism is fixedly installed on the upper end face of the top plate close to the front plate. The shift head of the shift execution mechanism is located at the lower end of the shift execution mechanism. An opening is provided in the top plate corresponding to the position of the shift head, and the shift head extends downward from the opening in the top plate and is fixedly connected to the shift head guide block in a matching manner. When testing different types of shift execution mechanisms, only a shift head guide block matching its shift head needs to be replaced, which greatly improves the versatility of the shift execution mechanism test equipment and saves test costs.

[0007] The sensor assembly includes a high-precision displacement sensor and a high-precision force sensor. The lower end of the high-precision displacement sensor is fixedly connected to the bottom plate outside the front plate. A through hole is provided in the front plate corresponding to the pull rod of the high-precision displacement sensor. The pull rod of the high-precision displacement sensor passes through the through hole and is coaxially fixedly connected to the shift fork shaft. The rear end of the shift fork shaft is fixedly connected to the front end of the high-precision force sensor by threads. The load test piece includes a load loading assembly, a load fork shaft and a rotation limit locking piece. The load loading assembly and the rotation limit locking piece are respectively fixedly installed on the bottom plate behind the shift fork shaft by threads. The load fork shaft is horizontally arranged, and its front end is fixedly connected to the rear end of the high-precision force sensor by threads. The load loading assembly is elastically limited and pressed against the load fork shaft, and the rear part of the load fork shaft can be limited and fixed on the rotation limit locking piece. The high-precision displacement sensor, the shift fork shaft, the high-precision force sensor and the load fork shaft are all arranged on the same straight line. The load loading assembly can truly simulate the actual working conditions, and the load loading assembly adopts a mechanical variable resistance mechanism to achieve the purpose of controlling the load force. The high-precision displacement sensor and the high-precision force sensor realize the sensor calibration function. During the shifting process, the shift fork shaft moves, thereby driving the change of the compression amount of the high-precision displacement sensor. The high-precision displacement sensor is connected to the data acquisition device and presented on the upper computer PC side, so as to monitor the change of the displacement in real time. If there is a displacement sensor inside the shift execution mechanism, the internal sensor of the execution mechanism can be calibrated and verified through this test equipment, and at the same time, the shifting accuracy, shifting consistency and other performances can be verified. The high-precision force sensor is installed on the movement track of the shift fork shaft, and can measure the change of the dynamic shifting force in real time during the shifting process and can output off-line test data for convenient data retention and analysis and processing. The multi-functional test component also includes a static shifting force test piece. Just insert the fork shaft locking pin of the static shifting force test piece into the rotation limit locking seat to realize the test of the static shifting force of the shift execution mechanism.

[0008] The multi-functional test component further includes a simulated oil circuit component. The simulated oil circuit component includes an oil sump, an oil pump, a lubricating oil collecting block, a suction pipe, a pressure pipe, an oil groove, and two oil injection universal joints. The oil sump is a rectangular shell welded to the four sides of the bottom plate, forming an open-top cuboid-shaped trough. The oil pump is fixedly installed by threading on the upper end surface of the top plate behind the shift actuator. The lubricating oil collecting block is fixedly installed on the lower end surface of the top plate. The oil pump and the lubricating oil collecting block are connected through the pressure pipe. The lower port of the suction pipe is inserted into the oil groove, and the oil groove is a lower concave groove, and the shape of the oil groove is set according to actual needs. The purpose of designing the lower concave oil groove is to enable the lubricating oil stored in the trough formed by welding the oil sump and the bottom plate to smoothly flow into the oil groove, facilitating the oil pump to suck the lubricating oil through the suction pipe and then supply it to the lubricating oil collecting block. The lubricating oil is sprayed out from the two oil injection universal joints on the oil outlet ports fixed by threading at the positions of the corresponding shift head guide block and the load top pin to lubricate these two places where dynamic strain is concentrated, simulating the actual lubricating oil circuit.

[0009] The structure of the shift actuator test equipment is simple, light in weight, low in cost, and high in versatility. The actuator test system of the present invention includes a host computer PC terminal, a CAN bus, a transmission controller TCU, a control and feedback circuit, and a shift actuator test equipment. The host computer PC terminal sends control instructions to the TCU through the CAN bus, thereby controlling the operation of the shift actuator, which in turn drives the shift actuator test equipment and triggers the sensors on the test equipment. The sensors of the test equipment are connected to the host computer PC terminal through the control and feedback circuit to achieve the functions of data acquisition, monitoring, and calibration. Then, through automated data processing, a performance test report of the actuator can be output for multi-functional testing, which is convenient to operate and the testing method is simple.

[0010] Furthermore, the installation platform includes a bottom plate, a front plate, two side plates, and a top plate. The front plate and the two side plates are respectively vertically and fixedly connected to the upper end surface of the bottom plate, and the left and right ends of the front plate are respectively vertically and fixedly connected to the same-side ends of the two side plates. The top plate is horizontally and fixedly connected to the tops of the front plate and the two side plates. The bottom plate, the front plate, the two side plates, and the top plate form a rectangular semi-closed accommodation space. The multi-functional test component includes a shift test piece and a load test piece. The shift test piece and the load test piece are fixedly connected at intervals front and back to the bottom plate in the semi-closed accommodation space and are located on the same straight line. There is an opening near the front plate on the top plate. The shift actuator is fixedly connected to the upper end surface of the top plate near the front plate, and its lower end extends out of the opening of the top plate and is fixedly connected to the upper end of the shift test piece. The sensor assembly includes a high-precision displacement sensor and a high-precision force sensor. The high-precision displacement sensor is fixedly connected to the bottom plate and its test end is fixedly connected to the front end of the shift test piece. The two ends of the high-precision force sensor are respectively fixedly connected to the rear end of the shift test piece and the front end of the load test piece.

[0011] The front panel and two side panels of the installation table are vertically fixed on the bottom plate by bolts. The front panel and the two side panels are vertically fixed to form an approximate "U" shape. The top panel is also horizontally fixed on the top end faces of the front panel and the two side panels to form a semi-closed accommodation space. The lower ends of the shift test piece and the load test piece are fixedly spaced in a straight line within this semi-closed accommodation space, and the shift test piece is close to the front panel. The shift actuator is fixedly installed on the upper end face of the top panel close to the front panel. There is an opening on the top panel, and the shift head of the shift actuator extends down through the opening and is fixedly connected in a matching manner with the shift head guide block at the upper end of the shift test piece. The high-precision displacement sensor is bolted to the outside of the semi-closed accommodation space close to the front panel. There is a through hole at the front panel corresponding to the pull rod of the high-precision displacement sensor. The pull rod passes through and is coaxially fixedly installed with the front end of the shift fork shaft of the shift test piece. The rear end of the shift fork shaft is threadedly connected to the front end of the high-precision force sensor, and the rear end of the high-precision force sensor is threadedly connected to the front end of the load fork shaft. The high-precision force sensor is installed on the movement track of the shift fork shaft and can measure the change of the dynamic shift force in real time during the shift process and output off-line test data for convenient data retention and analysis and processing.

[0012] Further, the shift test piece includes two bearings, two bearing supports, a shift fork shaft, and a shift head guide block. The two bearings are respectively fixedly connected within the two bearing supports. The two bearing supports are coaxially and spaced fixedly connected to the bottom plate. The shift fork shaft passes through the two bearings, and both ends are respectively exposed outside the bearings. The front end of the shift fork shaft is coaxially fixedly installed with the pull rod of the high-precision displacement sensor, and its rear end is threadedly connected to the front end of the high-precision force sensor. The shift actuator includes a shift head, which is arranged at the lower end of the shift actuator. The shift head and the shift head guide block are fixedly connected in a matching manner. The lower end of the high-precision displacement sensor is fixedly connected to the bottom plate outside the front panel. There is a through hole at the front panel corresponding to the pull rod of the high-precision displacement sensor. After the pull rod of the high-precision displacement sensor passes through the through hole, it is coaxially fixedly connected to the front end of the shift fork shaft. The rear end of the shift fork shaft is threadedly fixed to the front end of the high-precision force sensor.

[0013] The lower ends of the two bearing supports of the shift test piece are fixedly installed on the bottom plate at intervals. The two bearings are respectively fixedly installed within the two bearing supports. The shift fork shaft passes through the two bearings, and both ends are respectively exposed outside the bearings. The front end of the shift fork shaft is coaxially fixedly installed with the pull rod of the high-precision displacement sensor, and its rear end is threadedly connected to the front end of the high-precision force sensor. During the shift process, the shift fork shaft moves, thereby driving the change of the compression amount of the high-precision displacement sensor. The high-precision displacement sensor is connected to the data acquisition device and is presented on the upper computer PC side, so as to monitor the change of the displacement in real time. If there is a displacement sensor inside the shift actuator, the internal sensor of the actuator can be calibrated and verified through this test equipment. At the same time, the shift accuracy, shift consistency and other performances can be verified.

[0014] Furthermore, the load test piece includes a load loading assembly, a load fork shaft and a rotation limiting locking piece. The load loading assembly and the rotation limiting locking piece are fixed to the bottom plate behind the shift fork shaft with front and rear interval threads. The front end of the load fork shaft is coaxially threadedly fixed to the rear end of the high-precision force sensor. The load loading assembly is elastically limited and pressed onto the load fork shaft, and the rear part of the load fork shaft can be limited and fixed on the rotation limiting locking piece.

[0015] Furthermore, the load loading assembly includes two load loading seats, two load push pins, two load springs and two load plugs. The upper part of each load loading seat is provided with a step through hole, and the large hole end of the step through hole is provided with an internal thread. The small hole ends of the step through holes of the two load loading seats are fixed on the bottom plate at intervals relative to each other. The two load push pins are respectively limitedly inserted in the corresponding step through holes and their front ends can be elastically retracted outside the small hole ends of the step through holes. The two are respectively limitedly sleeved on the corresponding load push pins. The two load plugs are respectively threadedly connected to the corresponding step through holes and their front ends are pressed onto the rear end of the load springs. At least two load slots are provided on the left and right sides of the load fork shaft, and the front ends of the two load push pins are elastically limited and pressed onto the load slots corresponding to the load fork shaft.

[0016] The load test piece pushes the load pin through the spring force of the load spring, thereby applying a load force to the load fork shaft, thereby simulating the load generated by the synchronizer shift synchronization process. As the preferred technical solution for the shift actuator test system, the test equipment can truly simulate the actual working conditions according to the load loading assembly. The load loading assembly adopts a mechanical variable resistance mechanism. By adjusting the screw-in depth of the load screw plug, the compression amount of the load spring is controlled to achieve the purpose of controlling the load force. There are at least two load slots on the left and right sides of the load fork shaft. The two slots correspond to the forward and reverse gears respectively. The function of the slots is to facilitate the push pin to support the added load force. If the shift actuator has three gears, three load slots are set, and so on.

[0017] Furthermore, the rotation-limiting locking component includes a rotation-limiting lock shaft seat and two limit blocks. The upper portion of the rotation-limiting lock shaft seat is provided with a rotation-limiting groove and its bottom is threadedly fixed to the base plate behind the load loading assembly. The rear portion of the load fork shaft is inserted into the rotation-limiting groove. The side walls of the two limit blocks are provided with threaded connection holes and are respectively screwed onto the load fork shafts on the front and rear sides of the rotation-limiting lock shaft seat.

[0018] The rotation limit lock can limit the rotation angle and range of the shift fork shaft and the load fork shaft, ensuring that during the test, the moving parts of the shift actuator rotate according to the set requirements, preventing excessive rotation or abnormal rotation, thereby ensuring the accuracy and repeatability of the test.

[0019] Furthermore, the multifunctional test component further includes a simulated oil circuit component, which includes an oil sump, an oil pump, a lubricating oil collecting block, an oil suction pipe, a pressure oil pipe, an oil groove, and two oil injection universal joints. The oil sump is a rectangular frame, which is welded to the bottom plate outside the semi-closed accommodation space to form a cuboid-shaped groove that is open at the top. The oil pump is threadedly fixed to the upper end surface of the top plate behind the shift actuator. The lubricating oil collecting block is fixedly connected to the lower end surface of the top plate. The top plate is provided with a connecting through hole and a fuel supply through hole. The pressure oil pipe passes through the connecting through hole, and its two ends are respectively fixedly connected to the oil outlet of the oil pump and the oil inlet of the lubricating oil collecting block. The oil suction pipe passes through the fuel supply through hole, and its upper port is fixedly connected to the oil inlet of the oil pump. There is a concave oil groove on the bottom plate corresponding to the lower port of the oil suction pipe. The lower port of the oil suction pipe is suspended in the oil groove. The two oil injection universal joints are respectively threadedly fixed to the positions of the lubricating oil collecting block corresponding to the shift fork guide block and the load top pin and are respectively communicated with the corresponding oil outlets of the lubricating oil collecting block.

[0020] The welded connection between the oil sump of the present invention and the bottom plate can store lubricating oil. The oil pump is energized to continuously suck oil from the oil groove, and then the lubricating oil enters the oil passage in the lubricating oil collecting block, and then is sprayed out through the oil injection universal joints. The two oil injection universal joints spray lubricating oil towards the shift fork guide block and the load top pin respectively to lubricate these two places where dynamic strain is concentrated, simulating the actual lubricating oil circuit.

[0021] Furthermore, the multifunctional test component further includes a static shift force test piece, which includes a fork shaft locking pin. There is a locking pin hole on the side wall of the rotation-limiting locking shaft seat, and the fork shaft locking pin can be inserted and locked in the locking pin hole.

[0022] The multifunctional test component of the present invention further includes a static shift force test piece, that is, a fork shaft locking pin. When testing the static shift force, only need to insert the fork shaft locking pin into the rotation-limiting locking shaft seat to lock the fork shaft. At this time, the static shift force of the shift actuator can be realized. The high-precision force sensor can measure the change of the static shift force and can output off-line test data for convenient data retention and analysis and processing.

[0023] A shift actuator test system includes the shift actuator test equipment described above, and further includes a host computer PC terminal, a CAN bus, a transmission controller TCU, and a control and feedback circuit. The control and feedback circuit includes a control circuit and a feedback circuit. The shift actuator further includes a control switch and a displacement sensor. The host computer PC terminal is electrically connected to the transmission controller TCU through the CAN bus. The transmission controller TCU is electrically connected to the control switch of the shift actuator through the control circuit. The displacement sensor, the high-precision displacement sensor, and the high-precision force sensor are electrically connected to the host computer PC terminal through the feedback circuit.

[0024] A test method for a shift actuator test system is as follows:

[0025] S1. Before the test, debug the equipment of the actuator test system. The PC terminal of the host computer sends control instructions to the transmission controller TCU through the CAN bus, controls the oil pump to pump oil from the oil tank, sprays lubricating oil to the shift head guide block and the load top pin through the oil injection universal joint to simulate the actual lubricating oil path, adjusts the load force by changing the screwing depth of the load plug thread to meet the actual vehicle load force, and conducts program debugging and parameter input on the PC terminal of the host computer. Input the required number of times N1 for the dynamic shift force test, the required number of times N2 for the shift displacement test, the required number of times N3 for the shift time test, the required number of times N4 for the shift durability test, the displacement correction error threshold Δ, the displacement change rate stability threshold dx_t, the shift timeout threshold t_hold, and the theoretical displacement X_theory;

[0026] S2. Start the control program on the PC terminal of the host computer. First, conduct the dynamic shift force test, and judge whether the current cumulative number of shifts in the shift force test reaches the required number of times N1. If it reaches, stop data acquisition and automatically process and analyze the data;

[0027] S3. Conduct the shift displacement test, and judge whether the current cumulative number of shifts in the shift displacement test reaches the required number of times N2. If it reaches, stop data acquisition and automatically process and analyze the data;

[0028] S4. Conduct the shift time test, and judge whether the current cumulative number of shifts in the shift time test reaches the required number of times N3. If it reaches, stop data acquisition and automatically process and analyze the data;

[0029] S5. Conduct the shift durability test, and judge whether the current cumulative number of shifts in the shift durability test reaches the required number of times N4. If it reaches, stop data acquisition and automatically process and analyze the data;

[0030] S6. After the test, automatically organize, analyze and output the test reports of each test.

[0031] The specific test method and detailed steps are as follows:

[0032] Before the test, debug the equipment of the actuator test system, adjust the load force by changing the screwing depth of the load plug thread to meet the actual vehicle load force, and conduct program debugging and parameter input on the PC terminal of the host computer: the required number of times N1 for the dynamic shift force test, the required number of times N2 for the shift displacement test, the required number of times N3 for the shift time test, the required number of times N4 for the shift durability test, the displacement correction error threshold Δ, the displacement change rate stability threshold dx_t, the shift timeout threshold t_hold, and the theoretical displacement X_theory;

[0033] The host computer PC - side control program starts. First, it conducts a dynamic shift force test. First, it judges whether the current cumulative number of shifts in the shift force test has reached the required number N1. If it has reached, it stops data acquisition and automatically processes and analyzes the data. If it has not reached, it energizes the upshift solenoid valve and de - energizes the downshift solenoid valve to achieve the upshift action and real - time monitors and collects high - precision displacement and high - precision force sensors. At this time, the abnormal timer t resets to zero and starts timing. It judges whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, it triggers the alarm mechanism and the test pauses, and there may be situations such as shift jamming that require manual handling. If it does not exceed t_hold, it continues to judge whether the displacement change rate dx calculated from the displacement data collected by the high - precision displacement sensor is less than the stable threshold dx_t. When the shift is completed, the displacement change rate is 0. At this time, the displacement will no longer change and the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ, the abnormal timer is cleared. After a 0.5 - s delay, the upshift solenoid valve is de - energized and the downshift solenoid valve is energized to achieve the downshift action and real - time monitors and collects high - precision displacement and high - precision force sensors. At this time, the abnormal timer t resets to zero and starts timing. It judges whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, it triggers the alarm mechanism and the test pauses. If it does not exceed t_hold, it continues to judge whether the displacement change rate dx calculated from the displacement data collected by the high - precision displacement sensor is less than the stable threshold dx_t and the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ. When it is considered that a cycle of the shift force test is completed, that is, the current cumulative number of shifts in the shift force test + 1, and then the loop continues to judge whether the current cumulative number of shifts in the shift force test has reached the number N1;

[0034] Perform a shift displacement test. First, determine whether the current cumulative number of shifts in the shift displacement test has reached the number N2. If it has reached, stop data acquisition and automatically process and analyze the data; if it has not reached, energize the upshift solenoid valve and de-energize the downshift solenoid valve to achieve an upshift action, and monitor and collect high-precision displacement in real time. At this time, the abnormal timer t is reset and starts timing. Determine whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, trigger the alarm mechanism and pause the test. There may be situations such as shift jamming that require manual handling. If it does not exceed t_hold, continue to determine whether the displacement change rate dx calculated from the displacement data collected by the high-precision displacement sensor is less than the stable threshold dx_t. If the shift is completed, the displacement change rate is 0. At this time, the displacement will no longer change, and when the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ, the abnormal timer is cleared. After a 0.5 s delay, de-energize the upshift solenoid valve and energize the downshift solenoid valve to achieve a downshift action, and monitor and collect high-precision displacement in real time. At this time, the abnormal timer t is reset and starts timing. Determine whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, trigger the alarm mechanism and pause the test; if it does not exceed t_hold, continue to determine whether the displacement change rate dx calculated from the displacement data collected by the high-precision displacement sensor is less than the stable threshold dx_t and the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ. If so, it is considered that one cycle of the shift displacement test is completed, that is, the current cumulative number of shifts in the shift displacement test +1, and then continue to loop to determine whether the current cumulative number of shifts in the shift displacement test has reached the number N2;

[0035] Perform a shift time test. First, determine whether the current cumulative number of shifts in the shift time test has reached the number N3. If it has reached, stop data acquisition and automatically process and analyze the data; if it has not reached, energize the upshift solenoid valve and de-energize the downshift solenoid valve to achieve the upshift action), and monitor and collect high-precision displacement in real time, record and calculate the displacement data. At this time, the abnormal timer t is reset to zero and starts timing. Determine whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, trigger the alarm mechanism and pause the test. There may be situations such as shift jamming that require manual handling. If it does not exceed t_hold, continue to determine whether the displacement change rate dx calculated from the displacement data collected by the high-precision displacement sensor is less than the stable threshold dx_t. If the shift is completed, the displacement change rate is 0. At this time, the displacement will no longer change, and when the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ, the abnormal timer is cleared. After a delay of 0.5 s, the upshift solenoid valve is de-energized and the downshift solenoid valve is energized to achieve the downshift action and monitor and collect high-precision displacement in real time. At this time, the abnormal timer t is reset to zero and starts timing. Determine whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, trigger the alarm mechanism and pause the test; if it does not exceed t_hold, continue to determine whether the displacement change rate dx calculated from the displacement data collected by the high-precision displacement sensor is less than the stable threshold dx_t and the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ. If so, it is considered that one cycle of the shift time test is completed, that is, the current cumulative number of shifts in the shift time test +1, and then the loop continues to determine whether the current cumulative number of shifts in the shift time test has reached the number N3;

[0036] The gear shift durability test is performed. First, it is determined whether the current cumulative number of gear shifts in the gear shift durability test has reached the number N4. If it has reached, data collection is stopped, and the data is automatically processed and analyzed. If it has not reached, the gear shift solenoid valve is energized and the gear shift solenoid valve is de-energized to realize the gear shift action and collect high-precision displacement every 30 minutes. At this time, the abnormal timer t starts timing from zero to determine whether t exceeds the gear shift timeout threshold t_hold at this time. If it exceeds t_hold, the alarm mechanism is triggered and the test is suspended. There may be situations such as gear shift jamming that require manual processing. If it does not exceed t_hold, it continues to determine whether the displacement change rate dx calculated by the displacement data collected by the high-precision displacement sensor is less than the stable threshold dx_t. If the gear shift is completed, the displacement change rate is 0. At this time, the displacement will not change again and the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ, the abnormal timer is cleared. After a delay of 0.5s, the shift forward solenoid valve is powered off and the shift backward solenoid valve is powered on, realizing the shift backward action and real-time monitoring and collecting high-precision displacement. At this time, the abnormal timer t starts timing from zero to determine whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, the alarm mechanism is triggered and the test is suspended; if it does not exceed t_hold, it continues to determine whether the displacement change rate dx calculated by the displacement data collected by the high-precision displacement sensor is less than the stable threshold dx_t and the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ. It is considered that the shift endurance test has completed one cycle, that is, the current cumulative number of shifts in the shift endurance test + 1, and then the cycle continues to determine whether the current cumulative number of shifts in the shift endurance test reaches the number N4. When the endurance test is completed, the actuator is manually removed and disassembled to observe whether there is wear and breakage of parts, etc., and the endurance test is terminated.

[0037] After the test is completed, the test reports of each test are automatically sorted, analyzed and output.

[0038] The test method of the shift actuator test system can not only test the dynamic shift force changes, but also the static shift force. When doing the static shift force test, insert the fork shaft locking pin into the rotation limit lock shaft seat, screw the load screw plug to the deepest, that is, tighten the load screw plug to the tightest. The test process method is consistent with the dynamic shift force test method.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] 1. The gear shift actuator test equipment of the present invention has a simple structure and low cost;

[0041] 2. The shift actuator test equipment of the present invention can simulate the synchronizer load under actual working conditions, and has the functions of shift force detection, sensor calibration, durability test, oil circuit lubrication simulation, and automated testing;

[0042] 3. The shift execution mechanism test equipment of the present invention can be applicable to various shift execution mechanisms. Different shift execution mechanisms can be detachably and fixedly installed on the top plate. By replacing the shift head guide block on the shift fork shaft to make it match and be fixedly installed with the shift head of the shift execution mechanism, a new shift execution mechanism test equipment can be obtained, which has strong versatility;

[0043] 4. The shift execution mechanism test system of the present invention has a simple test method, accurate test results, and good test effects. Description of the Drawings

[0044] Figure 1 is a schematic diagram of the overall structure of the shift execution mechanism test equipment of the present invention;

[0045] Figure 2 is a cross-sectional view of the structure of the shift execution mechanism test equipment of the present invention;

[0046] Figure 3 is a partial schematic diagram of the structure of the shift execution mechanism test equipment of the present invention;

[0047] Figure 4 is a cross-sectional view of the structure of the B-B load loading assembly of the present invention;

[0048] Figure 5 is an installation schematic diagram of the simulated oil circuit assembly of the present invention;

[0049] Figure 6 is a schematic diagram of the shift execution mechanism test system of the present invention;

[0050] Figure 7 is a schematic diagram of the test method flow of the shift execution mechanism test system of the present invention.

[0051] In the figures:

[0052] 1. Installation table; 1.1. Bottom plate; 1.2. Front plate; 1.3. Side plate; 1.4. Top plate; 2. Multifunctional test component; 2.1. Shift test piece; 2.11. Bearing; 2.12. Bearing support seat; 2.13.

[0053] Shift fork shaft; 2.14. Shift head guide block; 2.2. Load test piece; 2.21. Load loading assembly; 2.211. Load loading seat; 2.212. Load top pin; 2.213. Load spring; 2.214. Load plug; 2.22. Load fork shaft; 2.221. Load groove; 2.23. Rotation limit locking part; 2.231.

[0054] Rotation lock shaft seat; 2.232. Limit block; 2.233. Rotation limit groove; 2.234. Locking pin hole; 2.3.

[0055] Simulated oil circuit components; 2.31. Oil pan; 2.32. Oil pump; 2.33. Lubricating oil collecting block; 2.34.

[0056] Suction oil pipe; 2.35. Pressure oil pipe; 2.36. Oil tank; 2.37. Oil injection universal joint; 2.4. Static shift force test piece; 2.41. Fork shaft locking pin; 3. Sensor assembly; 3.1. High-precision displacement sensor; 3.2. High-precision force sensor; 4. Shift actuator; 4.1. Poking head. Specific implementation manners

[0057] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the scope of protection of the present invention.

[0058] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "the" and "said" used in the present invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Plural" generally includes at least two.

[0059] It should be noted that the orientation or positional relationship indicated by the terms "front", "rear", "inner", "outer", "left", "right", etc. in the present invention is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0060] It should be particularly noted that the symbols and / or numbers in the specification that are not marked in the accompanying drawings are not reference numerals.

[0061] For the embodiments provided by the present invention, namely, embodiments of a shift actuator test device, a test system and a test method, the following will be combined with Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 be described in detail.

[0062] Embodiment 1:

[0063] See Figure 1As shown in the figure, a shift actuator test device includes a mounting table 1, a multi-functional test component 2, a sensor component 3, and a shift actuator 4. The multi-functional test component 2 is arranged on the mounting table 1, the sensor component 3 is arranged on the multi-functional test component 2, and the shift actuator 4 is connected to the multi-functional test component 2.

[0064] See Figure 2 , Figure 3 As shown in the figure, the mounting table 1 includes a bottom plate 1.1, a front plate 1.2, two side plates 1.3, and a top plate 1.4. The front plate 1.2 and the two side plates 1.3 are respectively vertically and fixedly connected to the upper end surface of the bottom plate 1.1, and the left and right ends of the front plate 1.2 are respectively vertically and fixedly connected to the same-side ends of the two side plates 1.3. The top plate 1.4 is horizontally and fixedly connected to the tops of the front plate 1.2 and the two side plates 1.3. The bottom plate 1.1, the front plate 1.2, the two side plates 1.3, and the top plate 1.4 form a rectangular semi-closed accommodation space. The multi-functional test component 2 includes a shift test piece 2.1 and a load test piece 2.2. The shift test piece 2.1 and the load test piece 2.2 are fixedly connected to the bottom plate 1.1 in the semi-closed accommodation space at intervals front and back and are located on the same straight line. There is an opening near the front plate 1.2 on the top plate 1.4. The shift actuator 4 is fixedly connected to the upper end surface of the top plate 1.4 near the front plate 1.2, and its lower end extends out of the opening of the top plate 1.4 and is fixedly connected to the upper end of the shift test piece 2.1. The sensor component 3 includes a high-precision displacement sensor 3.1 and a high-precision force sensor 3.2. The high-precision displacement sensor 3.1 is fixedly connected to the bottom plate 1.1 and its test end is fixedly connected to the front end of the shift test piece 2.1. The two ends of the high-precision force sensor 3.2 are respectively fixedly connected to the rear end of the shift test piece 2.1 and the front end of the load test piece 2.2.

[0065] The shift test piece 2.1 includes two bearings 2.11, two bearing supports 2.12, a shift fork shaft 2.13, and a shift head guide block 2.14. The two bearings 2.11 are respectively fixedly connected inside the two bearing supports 2.12. The two bearing supports 2.12 are coaxially and spacedly fixedly connected to the bottom plate 1.1. The shift fork shaft 2.13 passes through the two bearings 2.11. The shift head guide block 2.14 is fixedly connected to the shift fork shaft 2.13 between the two bearings 2.11. The shift actuator 4 includes a shift head 4.1. The shift head 4.1 is arranged at the lower end of the shift actuator 4. The shift head 4.1 and the shift head guide block 2.14 are fixedly connected in a matching manner. The lower end of the high-precision displacement sensor 3.1 is fixedly connected to the bottom plate 1.1 outside the front plate 1.2. The front plate 1.2 is provided with a through hole corresponding to the pull rod of the high-precision displacement sensor 3.1. The pull rod of the high-precision displacement sensor 3.1 passes through the through hole and is coaxially fixedly connected to the front end of the shift fork shaft 2.13. The rear end of the shift fork shaft 2.13 is threadedly fixedly connected to the front end of the high-precision force sensor 3.2.

[0066] The load test piece 2.2 includes a load loading assembly 2.21, a load fork shaft 2.22, and a rotation limit locking piece 2.23. The load loading assembly 2.21 and the rotation limit locking piece 2.23 are fixed to the bottom plate 1.1 behind the shift fork shaft 2.13 by threaded connections at intervals in the front and rear. The front end of the load fork shaft 2.22 is fixedly connected to the rear end of the high-precision force sensor 3.2 by coaxial threaded connection. The load loading assembly 2.21 is elastically limited and press-connected to the load fork shaft 2.22, and the rear part of the load fork shaft 2.22 can be limited and fixed to the rotation limit locking piece 2.23.

[0067] See Figure 4 As shown, the load loading assembly 2.21 includes two load loading seats 2.211, two load top pins 2.212, two load springs 2.213, and two load plugs 2.214. Each load loading seat 2.211 is provided with a stepped through hole at the upper part, and the large hole end of the stepped through hole is provided with internal threads. The small hole ends of the stepped through holes of the two load loading seats 2.211 are fixedly spaced relative to each other on the bottom plate 1.1. The two load top pins 2.212 are respectively limited and inserted into the corresponding stepped through holes, and their front ends can elastically extend outside the small hole ends of the stepped through holes. The two load springs 2.213 are respectively limited and sleeved on the corresponding load top pins 2.212. The two load plugs 2.214 are respectively threadedly connected into the corresponding stepped through holes, and their front ends are pressed against the rear ends of the load springs 2.213. At least two load grooves 2.221 are provided on both the left and right sides of the load fork shaft 2.22, and the front ends of the two load top pins 2.212 are elastically limited and press-connected to the corresponding load grooves 2.221 on the load fork shaft 2.22.

[0068] The rotation limit locking piece 2.23 includes a rotation limit lock shaft seat 2.231 and two limit blocks 2.232. The upper part of the rotation limit lock shaft seat 2.231 is provided with a rotation limit groove 2.233, and its bottom is threadedly fixed to the bottom plate 1.1 behind the load loading assembly 2.21. The rear part of the load fork shaft 2.22 is inserted into the rotation limit groove 2.233. Threaded connection holes are provided on the side walls of the two limit blocks 2.232 and are respectively screwed onto the load fork shaft 2.22 on the front and rear sides of the rotation limit lock shaft seat 2.231.

[0069] See Figure 5As shown in the figure, the multifunctional test component 2 further includes an analog oil circuit component 2.3. The analog oil circuit component 2.3 includes an oil pan 2.31, an oil pump 2.32, a lubricating oil collecting block 2.33, an oil suction pipe 2.34, an oil pressure pipe 2.35, an oil groove 2.36 and two oil injection universal joints 2.37. The oil pan 2.31 is a rectangular frame, which is welded to the bottom plate 1.1 on the outside of the semi-closed accommodation space to form a cuboid-shaped groove with an open upper part. The oil pump 2.32 is fixedly screwed to the upper end surface of the top plate 1.4 behind the shift actuator 4. The lubricating oil collecting block 2.33 is fixedly connected to the lower end surface of the top plate 1.4. The top plate 1.4 is provided with a connecting through hole and an oil supply through hole. The oil pressure pipe 2.35 passes through the connecting through hole, and its two ends are respectively fixedly communicated with the oil outlet of the oil pump 2.32 and the oil inlet of the lubricating oil collecting block 2.33. The oil suction pipe 2.34 passes through the oil supply through hole, and its upper port is fixedly communicated with the oil inlet of the oil pump 2.32. An oil groove 2.36 is provided on the bottom plate 1.1 corresponding to the lower port of the oil suction pipe 2.34. The lower port of the oil suction pipe 2.34 is suspended in the oil groove 2.36. The two oil injection universal joints 2.37 are respectively fixedly screwed to the positions of the lubricating oil collecting block 2.33 corresponding to the shift fork guide block 2.14 and the load top pin 2.212 and are respectively communicated with the corresponding oil outlet of the lubricating oil collecting block 2.33.

[0070] The multifunctional test component 2 further includes a static shift force test piece 2.4. The static shift force test piece 2.4 includes a fork shaft locking pin 2.41. A locking pin hole 2.234 is provided on the side wall of the rotation-limiting locking shaft seat 2.231. The fork shaft locking pin 2.41 can be inserted and locked in the locking pin hole 2.234.

[0071] Embodiment 2:

[0072] The present invention also provides a shift actuator test system, as shown in Figure 6 the figure. It includes the shift actuator test equipment described above, and also includes a host computer PC terminal, a CAN bus, a transmission controller TCU and a control and feedback circuit. The control and feedback circuit includes a control circuit and a feedback circuit. The shift actuator 4 further includes a control switch and a displacement sensor. The host computer PC terminal is electrically connected to the transmission controller TCU through the CAN bus. The transmission controller TCU is electrically connected to the control switch of the shift actuator 4 through the control circuit. The displacement sensor of the shift actuator 4, the high-precision displacement sensor 3.1 and the high-precision force sensor 3.2 are electrically connected to the host computer PC terminal through the feedback circuit.

[0073] Embodiment 3:

[0074] The present invention also provides a test method for the shift actuator test system, as shown in Figure 7 the figure. The steps are as follows:

[0075] S1. Before the test, debug the equipment of the actuator test system. The host computer PC sends control instructions to the transmission controller TCU through the CAN bus to control the oil pump 2.32 to pump oil from the oil tank 2.36, and spray lubricating oil to the shift head guide block 2.14 and the load top pin 2.212 through the oil injection universal joint 2.37 to simulate the actual lubricating oil path. Adjust the load force by changing the threaded insertion depth of the load plug 2.214 to meet the actual load force of the vehicle. Debug the program and input parameters on the host computer PC side, and input the number of times N1 required for the dynamic shift force test, the number of times N2 required for the shift displacement test, the number of times N3 required for the shift time test, the number of times N4 required for the shift durability test, the displacement correction error threshold Δ, the displacement change rate stability threshold dx_t, the shift timeout threshold t_hold, and the theoretical displacement X_theory;

[0076] S2. Start the control program of the host computer PC. First, conduct the dynamic shift force test. First, judge whether the current cumulative shift times in the shift force test reach the required number of times N1. If so, stop data acquisition and automatically process and analyze the data; if not, energize the forward shift solenoid valve and de-energize the reverse shift solenoid valve (to achieve the forward shift action), and monitor and collect the high-precision displacement and high-precision force sensor 3.2 in real time. At this time, the abnormal timer t is reset and starts timing. Judge whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, trigger the alarm mechanism and pause the test. There may be situations such as shift jamming that require manual handling. If it does not exceed t_hold, continue to judge whether the displacement change rate dx calculated from the displacement data collected by the high-precision displacement sensor 3.1 is less than the stability threshold dx_t (if the shift is completed, the displacement change rate is 0 and the displacement will no longer change) and the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ. When this is the case, clear the abnormal timer, wait for 0.5 s after the delay, de-energize the forward shift solenoid valve and energize the reverse shift solenoid valve (to achieve the reverse shift action), and monitor and collect the high-precision displacement and high-precision force sensor 3.2 in real time. At this time, the abnormal timer t is reset and starts timing. Judge whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, trigger the alarm mechanism and pause the test; if it does not exceed t_hold, continue to judge whether the displacement change rate dx calculated from the displacement data collected by the high-precision displacement sensor 3.1 is less than the stability threshold dx_t and the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ. If this is the case, it is considered that one cycle of the shift force test is completed, that is, the current cumulative shift times in the shift force test +1, and then continue to judge whether the current cumulative shift times in the shift force test reach the number of times N1 in a loop;

[0077] S3. Conduct the execution of the shift displacement test. First, determine whether the current cumulative number of shifts in the shift displacement test has reached the number N2. If it has reached, stop data acquisition and automatically process and analyze the data. If it has not reached, energize the upshift solenoid valve and de-energize the downshift solenoid valve to achieve the upshift action, and monitor and collect high-precision displacement in real time. At this time, the abnormal timer t is reset to zero and starts timing. Determine whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, trigger the alarm mechanism and pause the test. There may be situations such as shift jamming that require manual handling. If it does not exceed t_hold, continue to determine whether the displacement change rate dx calculated from the displacement data collected by the high-precision displacement sensor 3.1 is less than the stable threshold dx_t. If the shift is completed, the displacement change rate is 0. At this time, the displacement will no longer change and the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ, the abnormal timer is cleared. After a 0.5s delay, de-energize the upshift solenoid valve and energize the downshift solenoid valve to achieve the downshift action, and monitor and collect high-precision displacement in real time. At this time, the abnormal timer t is reset to zero and starts timing. Determine whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, trigger the alarm mechanism and pause the test. If it does not exceed t_hold, continue to determine whether the displacement change rate dx calculated from the displacement data collected by the high-precision displacement sensor 3.1 is less than the stable threshold dx_t and the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ. If so, it is considered that one cycle of the shift displacement test is completed, that is, the current cumulative number of shifts in the shift displacement test +1, and then the loop continues to determine whether the current cumulative number of shifts in the shift displacement test has reached the number N2;

[0078] S4. Conduct the shift time test. First, determine whether the current cumulative number of shifts in the shift time test has reached the number N3. If it has reached, stop data acquisition and automatically process and analyze the data. If it has not reached, energize the upshift solenoid valve and de-energize the downshift solenoid valve to achieve the upshift action, and monitor and collect high-precision displacement in real time, record and calculate the displacement data. At this time, the abnormal timer t is reset to zero and starts timing. Determine whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, trigger the alarm mechanism and pause the test. There may be situations such as shift jamming that require manual handling. If it does not exceed t_hold, continue to determine whether the displacement change rate dx calculated from the displacement data collected by the high-precision displacement sensor 3.1 is less than the stable threshold dx_t. If the shift is completed, the displacement change rate is 0. At this time, the displacement will no longer change and the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ, the abnormal timer is cleared. After a 0.5s delay, de-energize the upshift solenoid valve and energize the downshift solenoid valve to achieve the downshift action, and monitor and collect high-precision displacement in real time. At this time, the abnormal timer t is reset to zero and starts timing. Determine whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, trigger the alarm mechanism and pause the test. If it does not exceed t_hold, continue to determine whether the displacement change rate dx calculated from the displacement data collected by the high-precision displacement sensor 3.1 is less than the stable threshold dx_t and the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ. If so, it is considered that one cycle of the shift time test is completed, that is, the current cumulative number of shifts in the shift time test +1, and then the loop continues to determine whether the current cumulative number of shifts in the shift time test has reached the number N3;

[0079] S5. Conduct the shift durability test. First, determine whether the current cumulative number of shifts in the shift durability test has reached the number N4. If it has reached, stop data acquisition and automatically process and analyze the data. If it has not reached, energize the upshift solenoid valve and de-energize the downshift solenoid valve to achieve the upshift action, and collect high-precision displacement every 30 minutes. At this time, the abnormal timer t is reset to zero and starts timing. Determine whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, trigger the alarm mechanism and pause the test. There may be situations such as shift jamming that require manual handling. If it does not exceed t_hold, continue to determine whether the displacement change rate dx calculated from the displacement data collected by the high-precision displacement sensor 3.1 is less than the stable threshold dx_t. When the shift is completed, the displacement change rate is 0, and the displacement will no longer change), and when the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ, the abnormal timer is cleared. After a delay of 0.5 s, the upshift solenoid valve is de-energized and the downshift solenoid valve is energized to achieve the downshift action, and the high-precision displacement is monitored and collected in real time. At this time, the abnormal timer t is reset to zero and starts timing. Determine whether t exceeds the shift timeout threshold t_hold at this time. If it exceeds t_hold, trigger the alarm mechanism and pause the test. If it does not exceed t_hold, continue to determine whether the displacement change rate dx calculated from the displacement data collected by the high-precision displacement sensor 3.1 is less than the stable threshold dx_t and the absolute value of the difference between the current displacement and the theoretical displacement does not exceed the displacement correction error threshold Δ. It is considered that one cycle of the shift durability test is completed, that is, the current cumulative number of shifts in the shift durability test +1. Then, continue to loop and determine whether the current cumulative number of shifts in the shift durability test has reached the number N4. When the number of durability test times is full, manually remove the actuator and disassemble it to observe whether there are situations such as part wear and fracture. Thus, the durability test ends;

[0080] S6. After the test ends, automatically organize, analyze, and output the test reports of each test.

[0081] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shift execution mechanism test device, characterized in that, It includes an installation table (1), a multi-functional test component (2), a sensor component (3) and a shift actuator (4). The multi-functional test component (2) is arranged on the installation table (1), the sensor component (3) is arranged on the multi-functional test component (2), and the shift actuator (4) is connected to the multi-functional test component (2).

2. The shift execution mechanism test equipment according to claim 1, characterized in that The installation table (1) includes a bottom plate (1.1), a front plate (1.2), two side plates (1.3) and a top plate (1.4). The front plate (1.2) and the two side plates (1.3) are respectively vertically and fixedly connected to the upper end surface of the bottom plate (1.1), and the left and right ends of the front plate (1.2) are respectively vertically and fixedly connected to the same-side ends of the two side plates (1.3). The top plate (1.4) is horizontally and fixedly connected to the tops of the front plate (1.2) and the two side plates (1.3). The bottom plate (1.1), the front plate (1.2), the two side plates (1.3) and the top plate (1.4) form a rectangular semi-closed accommodation space. The multi-functional test component (2) includes a shift test piece (2.1) and a load test piece (2.2). The shift test piece (2.1) and the load test piece (2.2) are fixedly connected to the bottom plate (1.1) in the semi-closed accommodation space at intervals front and back and are located on the same straight line. There is an opening near the front plate (1.2) on the top plate (1.4). The shift actuator (4) is fixedly connected to the upper end surface of the top plate (1.4) near the front plate (1.2), and its lower end extends out of the opening of the top plate (1.4) and is fixedly connected to the upper end of the shift test piece (2.1). The sensor component (3) includes a high-precision displacement sensor (3.1) and a high-precision force sensor (3.2). The high-precision displacement sensor (3.1) is fixedly connected to the bottom plate (1.1) and its test end is fixedly connected to the front end of the shift test piece (2.1). The two ends of the high-precision force sensor (3.2) are respectively fixedly connected to the rear end of the shift test piece (2.1) and the front end of the load test piece (2.2).

3. The shift execution mechanism test equipment according to claim 2, characterized in that, The shift test piece (2.1) includes two bearings (2.11), two bearing supports (2.12), a shift fork shaft (2.13) and a shift head guide block (2.14). The two bearings (2.11) are respectively fixedly connected within the two bearing supports (2.12). The two bearing supports (2.12) are coaxially and spacedly fixedly connected to the bottom plate (1.1). The shift fork shaft (2.13) passes through the two bearings (2.11). The shift head guide block (2.14) is fixedly connected to the shift fork shaft (2.13) between the two bearings (2.11). The shift actuator (4) includes a shift head (4.1). The shift head (4.1) is arranged at the lower end of the shift actuator (4). The shift head (4.1) and the shift head guide block (2.14) are fixedly connected in a matching manner. The lower end of the high-precision displacement sensor (3.1) is fixedly connected to the bottom plate (1.1) outside the front plate (1.2). The front plate (1.2) is provided with a through hole corresponding to the pull rod of the high-precision displacement sensor (3.1). After the pull rod of the high-precision displacement sensor (3.1) passes through the through hole, it is coaxially fixedly connected to the front end of the shift fork shaft (2.13). The rear end of the shift fork shaft (2.13) is threadedly fixedly connected to the front end of the high-precision force sensor (3.2).

4. The shift actuator test equipment according to claim 3, characterized in that The load test piece (2.2) includes a load loading assembly (2.21), a load fork shaft (2.22) and a rotation limit locking part (2.23). The load loading assembly (2.21) and the rotation limit locking part (2.23) are threadedly and fixedly connected to the bottom plate (1.1) behind the shift fork shaft (2.13) at intervals in the front and rear directions. The front end of the load fork shaft (2.22) is coaxially and threadedly fixedly connected to the rear end of the high-precision force sensor (3.2). The load loading assembly (2.21) is elastically limited and press-connected to the load fork shaft (2.22). The rear part of the load fork shaft (2.22) can be limited and fixed to the rotation limit locking part (2.23).

5. The shift execution mechanism test equipment according to claim 4, characterized in that, The load loading assembly (2.21) includes two load loading seats (2.211), two load top pins (2.212), two load springs (2.213) and two load plugs (2.214). A stepped through hole is provided in the upper part of each load loading seat (2.211). An internal thread is provided at the large hole end of the stepped through hole. The small hole ends of the stepped through holes of the two load loading seats (2.211) are fixedly spaced opposite to each other on the bottom plate (1.1). The two load top pins (2.212) are respectively inserted into the corresponding stepped through holes in a limited manner, and their front ends can elastically expand and contract outside the small hole ends of the stepped through holes. The two load springs (2.213) are respectively sleeved on the corresponding load top pins (2.212) in a limited manner. The two load plugs (2.214) are respectively threadedly connected into the corresponding stepped through holes, and their front ends are pressed against the rear ends of the load springs (2.213). At least two load grooves (2.221) are provided on both the left and right sides of the load fork shaft (2.22). The front ends of the two load top pins (2.212) are elastically and limitedly pressed against the corresponding load grooves (2.221) of the load fork shaft (2.22).

6. The shift execution mechanism test equipment according to claim 5, characterized in that The rotation limiting and locking member (2.23) includes a rotation limiting lock shaft seat (2.231) and two limit blocks (2.232). A rotation limiting groove (2.233) is provided in the upper part of the rotation limiting lock shaft seat (2.231), and its bottom is threadedly fixed to the bottom plate (1.1) behind the load loading assembly (2.21). The rear part of the load fork shaft (2.22) is inserted into the rotation limiting groove (2.233). Threaded connection holes are provided on the side walls of the two limit blocks (2.232), and they are respectively screwed onto the load fork shaft (2.22) on the front and rear sides of the rotation limiting lock shaft seat (2.231).

7. The shift execution mechanism test equipment according to claim 6, wherein The multi-functional test component (2) further includes an analog oil circuit component (2.3). The analog oil circuit component (2.3) includes an oil pan (2.31), an oil pump (2.32), a lubricating oil collecting block (2.33), an oil suction pipe (2.34), an oil pressure pipe (2.35), an oil tank (2.36) and two oil injection universal joints (2.37). The oil pan (2.31) is a rectangular frame, which is welded to the bottom plate (1.1) outside the semi-closed accommodation space to form a cuboid-shaped groove with an open upper part. The oil pump (2.32) is threadedly fixed on the upper end face of the top plate (1.4) behind the shift actuator (4). The lubricating oil collecting block (2.33) is fixedly connected to the lower end face of the top plate (1.4). The top plate (1.4) is provided with a connecting through hole and an oil supply through hole. The oil pressure pipe (2.35) passes through the connecting through hole, and its two ends are respectively fixedly communicated with the oil outlet of the oil pump (2.32) and the oil inlet of the lubricating oil collecting block (2.33). The oil suction pipe (2.34) passes through the oil supply through hole and its upper port is fixedly communicated with the oil inlet of the oil pump (2.32). A concave oil tank (2.36) is provided on the bottom plate (1.1) corresponding to the lower port of the oil suction pipe (2.34). The lower port of the oil suction pipe (2.34) is suspended in the oil tank (2.36). The two oil injection universal joints (2.37) are respectively threadedly fixed at the positions corresponding to the shift finger guide block (2.14) and the load top pin (2.212) of the lubricating oil collecting block (2.33) and are respectively communicated with the corresponding oil outlet of the lubricating oil collecting block (2.33).

8. The shift execution mechanism test equipment according to claim 7, characterized in that The multi-functional test component (2) further includes a static shift force test piece (2.4). The static shift force test piece (2.4) includes a fork shaft locking pin (2.41). A locking pin hole (2.234) is provided on the side wall of the rotation limiting locking shaft seat (2.231). The fork shaft locking pin (2.41) can be inserted and locked in the locking pin hole (2.234).

9. A shift execution mechanism testing system, characterized in that, It includes a shift actuator test device according to any one of claims 1 to 8, and further includes a host computer PC terminal, a CAN bus, a transmission controller TCU and a control and feedback circuit. The control and feedback circuit includes a control circuit and a feedback circuit. The shift actuator (4) further includes a control switch and a displacement sensor. The host computer PC terminal is electrically connected to the transmission controller TCU through the CAN bus. The transmission controller TCU is electrically connected to the control switch of the shift actuator (4) through the control circuit. The displacement sensor, the high-precision displacement sensor (3.1) and the high-precision force sensor (3.2) of the shift actuator (4) are electrically connected to the host computer PC terminal through the feedback circuit.

10. A testing method for a shift execution mechanism testing system, characterized in that, The steps are as follows: S1. Before the test, debug the equipment of the actuator test system. The PC terminal of the upper computer sends control instructions to the transmission controller TCU through the CAN bus, controls the oil pump (2.32) to pump oil from the oil tank (2.36), sprays lubricating oil to the shift head guide block (2.14) and the load top pin (2.212) through the oil injection universal joint (2.37), simulates the actual lubricating oil path, adjusts the load force by changing the thread screwing depth of the load plug (2.214) to meet the actual load force of the whole vehicle, debug the program of the PC terminal of the upper computer and input parameters, input the required number of times N1 for the dynamic shift force test, the required number of times N2 for the shift displacement test, the required number of times N3 for the shift time test, the required number of times N4 for the shift durability test, the displacement correction error threshold Δ, the displacement change rate stability threshold dx_t, the shift timeout threshold t_hold, and the theoretical displacement X_theory; S2. Start the control program of the PC terminal of the upper computer. First, conduct the dynamic shift force test, and judge whether the current cumulative number of shifts in the shift force test reaches the required number of times N1. If it reaches, stop data acquisition and automatically process and analyze the data; S3. Conduct the shift displacement test, and judge whether the current cumulative number of shifts in the shift displacement test reaches the required number of times N2. If it reaches, stop data acquisition and automatically process and analyze the data; S4. Conduct the shift time test, and judge whether the current cumulative number of shifts in the shift time test reaches the required number of times N3. If it reaches, stop data acquisition and automatically process and analyze the data; S5. Conduct the shift durability test, and judge whether the current cumulative number of shifts in the shift durability test reaches the required number of times N4. If it reaches, stop data acquisition and automatically process and analyze the data; S6. When the test is over, automatically sort out, analyze and output the test reports of each test.

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