Resistance measuring device and method for gear selecting and shifting executing mechanism of gearbox

Abstract

The invention discloses a resistance measuring device and method for a gear selecting and shifting execution mechanism of a gearbox, and relates to the technical field of gear shifting tests.The resistance measuring device comprises a shell, the shell is composed of a front outer shell, a middle outer shell and a rear outer shell, the front outer shell, the middle outer shell and the rear outer shell are sequentially connected, and the front end of the front outer shell is fixedly connected with a dust cover; a steel cable flexible shaft penetrates between the dustproof cover and the front outer shell; and one end of the extension rod is in threaded connection with a force sensor, and one end, away from the extension rod, of the force sensor is in threaded connection with a handle. According to the scheme, when the gear selecting and shifting executing mechanism moves in a circular arc mode, the motion is transmitted to the handle of the measuring device, the corresponding relation of force and displacement of the gear selecting and shifting executing mechanism is recorded, offset and resistance generated by the circular arc motion of the gear selecting and shifting executing mechanism relative to the linear motion of the handle of the measuring device are eliminated, and therefore the design of the gear selecting and shifting executing mechanism is optimized; and the measurement accuracy and the system stability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of gear shifting test, and in particular to a resistance measuring device for a gearbox gear selection and shifting actuator, a test bench, a vehicle and a resistance measuring method for the gearbox gear selection and shifting actuator. Background Art

[0002] The gear selection and shifting actuator is a key core component of the gearbox assembly. Its product performance, especially the gear selection and shifting resistance, directly affects the gearbox's operating effect and the comfort of the speed control system.

[0003] Patent No. CN113670490A discloses a force-displacement measuring device and a measuring method, which mainly introduces a force-displacement measuring device and a measuring method for a foot control mechanism. The device is simple and practical, has high measurement accuracy, good force stability, and greatly shortens the measurement cycle.

[0004] Patent No. CN114371000A discloses a gearbox shift actuator test bench and test method, which mainly introduces a test bench that uses friction force to simulate gearbox damping to test the performance and life of the gearbox shift actuator.

[0005] Patent No. CN114397114A discloses a test bench, which mainly introduces a test bench for performance testing of a speed control system of an automobile. After the speed control system is assembled according to the actual vehicle, the overall performance of the speed control system is measured at the speed control lever.

[0006] However, the traditional method of measuring the resistance of the gear selector and shift actuator uses a handheld dynamometer, which is manually pulled along the rotation direction of the gear shift actuator and the data is read. This method has poor accuracy and large errors, and is unable to obtain the force-stroke correspondence, which does not meet the needs of the comfort design of the gear selector and shift control system. Summary of the invention

[0007] The main purpose of the present invention is to provide a resistance measuring device for a gearbox shift actuator, which can effectively solve the technical problem that the traditional gear selection and shift actuator resistance measurement method in the background technology uses a hand-held dynamometer, manually pulls along the rotation direction of the gear shift actuator and reads the data, has poor accuracy and large errors, cannot obtain the force-stroke correspondence, and does not meet the requirements of the comfort design of the gear selection and shift control system.

[0008] To achieve the above object, the technical solution adopted by the present invention is:

[0009] In a first aspect, the present application provides a resistance measuring device for a gearbox shift actuator, comprising a housing, the housing comprising a front housing, a middle housing and a rear housing, the front housing, the middle housing and the rear housing being connected in sequence, and a dust cover being fixedly connected to the front end of the front housing, a steel cable flexible shaft being passed through between the dust cover and the front housing, and generating elastic resistance when approaching the front housing;

[0010] One end of the steel cable flexible shaft is threadedly connected to a round hole joint, and the other end of the steel cable flexible shaft is threadedly connected to an extension rod, one end of the extension rod is threadedly connected to a force sensor, and one end of the force sensor is threadedly connected to a handle away from the extension rod; when the extension rod generates elastic resistance during the linear motion of the handle, the torque change during the gear selection and shifting process is detected by the force sensor;

[0011] A displacement sensor is fixedly installed on the inner side of the rear outer shell near the bottom, and the detection end of the displacement sensor is in contact with the handle to detect the axial displacement during the gear selection and shifting process. As a further solution of the present invention, the inner sides of the opposite surfaces of the front outer shell and the rear outer shell are integrally connected with a socket, and both ends of the middle outer shell are fixedly connected with a card block, and the two card blocks are respectively engaged with the two card seats.

[0012] As a further solution of the present invention, nuts are fixedly installed at both ends of the steel cable flexible shaft, the inner diameter of the nuts is larger than the outer diameter of the steel cable flexible shaft, and the two nuts are threadedly connected to the round hole connector and the extension rod respectively.

[0013] As a further solution of the present invention, the outer contour of the dust cover is arranged in a wave shape.

[0014] As a further solution of the present invention, a plurality of mounting holes are provided on the outer surface of the handle, and the mounting holes are used to install function buttons for controlling the displacement sensor and the force sensor.

[0015] As a further solution of the present invention, a through hole is opened on the outer surface of the rear outer shell, and the through hole is used to install the data transmission interface of the displacement sensor and the force sensor; the data transmission interface is connected to the signal receiving port of the external data collection device, and is used to receive the electrical signals output by the displacement sensor and the force sensor, so as to realize data interaction with the displacement sensor and the force sensor.

[0016] In a second aspect, the present application provides a method for measuring the resistance of a gearbox shift actuator, the method comprising:

[0017] The force sensor and the displacement sensor are fixed in the same measuring device by a predefined fixing method to detect the torque change and the axial displacement of the preset position during the gear selection and shifting process;

[0018] The gear selector and shift actuator is adjusted to a preset position, and a data collection device is connected to obtain the corresponding relationship between the force and displacement measurement data of the gear selector and shift actuator based on the measurement data output by the force sensor and the displacement sensor.

[0019] As a further solution of the present invention, the detecting of the torque change and the axial displacement of the preset position during the gear selection and shifting process includes:

[0020] Adjust the measuring device so that the force sensor is in the preset position;

[0021] Select a round hole connector of corresponding size according to the gear selection and shifting actuator to be tested; connect the round hole connector to the arm of the gear selection and shifting actuator to be tested; control the outer shell and handle of the measuring device so that the measuring device is located close to the gear selection and shifting flexible shaft;

[0022] By operating the function button of the control handle, record when the outer shell of the measuring device remains stationary, and complete the recording by pushing and pulling the handle multiple times until the gear selection and shifting actuator reaches the maximum position; repeat the action until enough data is collected, and eliminate the data that deviates from the average value in the collected data.

[0023] In a third aspect, the present application further provides a test bench, comprising a resistance measuring device for a transmission shift actuator as described in any one of the first aspects.

[0024] In a fourth aspect, the present application further provides an automobile, characterized in that the automobile is equipped with a resistance measuring device for a transmission shift actuator as described in any one of the first aspects and / or a test bench as described in the third aspect.

[0025] Compared with the closest prior art, the beneficial effects of the present invention are as follows:

[0026] The front end of the measuring device provided by the present invention is provided with a steel cable flexible shaft, which can eliminate the deviation and resistance caused by the arc motion of the gear selection and shifting actuator relative to the linear motion of the measuring device handle.

[0027] Based on the measuring device and method proposed in the present invention, by setting a data collection device connected to the pressure sensor and the displacement sensor, the shifting force and displacement can be monitored in real time during the test, and the corresponding relationship between the force and displacement of the shifting actuator can be effectively recorded, which is of great significance for the design optimization of the transmission shifting mechanism, the design optimization of the vehicle shifting system, and the improvement of the comfort of the shifting operation. By continuously optimizing the design of the shifting mechanism and improving the performance of the shifting system, a more comfortable and convenient driving experience is provided for the driver.

[0028] The measuring device and method proposed in the present invention can realize single-person measurement, reduce workload and improve measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0030] Figure 1 A schematic diagram of the overall structure of a resistance measuring device for a gearbox shifting actuator provided by the present invention;

[0031] Figure 2 A flow chart of a resistance measurement method for a gearbox shift actuator provided by the present invention;

[0032] In the figure: 1. round hole joint; 2. steel cable flexible shaft; 3. dust cover; 4. front outer shell; 5. extension rod; 6. middle outer shell; 7. force sensor; 8. rear outer shell; 9. displacement sensor; 10. handle. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Combination Figure 1 , a resistance measuring device for a gearbox shift actuator, comprising a housing, the housing comprising a front housing 4, a middle housing 6 and a rear housing 8, the front housing 4, the middle housing 6 and the rear housing 8 being connected in sequence, and a dust cover 3 being fixedly connected to the front end of the front housing 4, a steel cable flexible shaft 2 being passed through between the dust cover 3 and the front housing 4, and generating elastic resistance when approaching the front housing 4;

[0035] One end of the steel cable flexible shaft 2 is threadedly connected to a round hole connector 1, and the other end of the steel cable flexible shaft 2 is threadedly connected to an extension rod 5, one end of the extension rod 5 is threadedly connected to a force sensor 7, and one end of the force sensor 7 is threadedly connected to a handle 10 away from the extension rod 5; when the extension rod 5 generates elastic resistance during the linear motion of the handle 10, the torque change during the gear selection and shifting process is detected by the force sensor 7;

[0036] A displacement sensor 9 is fixedly mounted on the inner side of the rear outer shell 8 near the bottom, and a detection end of the displacement sensor 9 is in contact with the handle 10 to detect the axial displacement during the gear selection and shifting process.

[0037] In the above embodiment, the steel cable flexible shaft 2 is composed of an internal steel wire rope and an external protective cover, which not only has good flexibility and strength, but also has a simple and compact structure, is easy to install and maintain, has high transmission efficiency, and can reduce energy loss. It can achieve flexible bending and twisting while maintaining a certain rigidity, and is suitable for use in working conditions where motion and power need to be transmitted but space is limited.

[0038] In this embodiment, in order to analyze the motion relationship between the gear selection and shifting actuator and the measuring device. In the gear selection and shifting actuator of the gearbox, circular motion is usually required to select different gears. However, the handle of the measuring device often needs to move in a straight line for measurement and recording. This mismatch in motion form will cause offset and resistance, affecting the accuracy of the measurement and the stability of the system.

[0039] Therefore, the offset and resistance can be eliminated by the steel cable flexible shaft 2. Specifically, the steel cable flexible shaft 2 transmits motion through the steel wire rope inside it, and the external protective cover plays a supporting and protective role. When the gear shift actuator performs circular motion, the steel cable flexible shaft 2 can flexibly follow this motion, and can eliminate the deviation of the motion direction by pushing forward and pulling back, and transmit the motion to the handle of the measuring device through the steel wire rope inside it. Based on its flexibility and strength, the offset and resistance caused by the mismatch of the motion form are effectively eliminated, thereby ensuring the accuracy and stability of the measurement.

[0040] In this embodiment, the inner sides of the opposite surfaces of the front outer shell 4 and the rear outer shell 8 are integrally connected with a card seat, and both ends of the middle outer shell 6 are fixedly connected with a card block, and the two card blocks are respectively engaged with the two card seats. The card connection method can facilitate the removal of the front outer shell 4, the rear outer shell 8 and the middle outer shell 6 at a later time, and the shell is divided into three parts, which is convenient for maintenance and replacement after removal at a later time.

[0041] In this embodiment, nuts are fixedly installed at both ends of the steel cable flexible shaft 2, the inner diameter of the nuts is larger than the outer diameter of the steel cable flexible shaft 2, and the two nuts are threadedly connected to the round hole connector 1 and the extension rod 5 respectively.

[0042] The provision of the two nuts not only facilitates the installation of the round hole connector 1 and the extension rod 5, but also facilitates the replacement of the round hole connector 1 with different adaptable models according to the model of the gear selection and shifting structure.

[0043] In this embodiment, the outer contour of the dust cover 3 is arranged in a wave shape.

[0044] The wavy dust cover 3 has better ductility and shrinkage, and has a better adaptation effect.

[0045] In this embodiment, a plurality of mounting holes are provided on the outer surface of the handle 10, and the mounting holes are used to install functional buttons of the displacement sensor 9 and the force sensor 7, and to control the signal output of the pressure sensor and the displacement sensor; for example, a "zero" button, and then pressing the "measurement" button to start recording; and pressing the "measurement" button again to end recording.

[0046] The function button is installed on the outside of the handle 10 to facilitate operation during use and control the displacement sensor 9 and the force sensor 7 to work.

[0047] In this embodiment, a through hole is provided on the outer surface of the rear outer shell 8, and the through hole is used to install the data transmission interface of the displacement sensor 9 and the force sensor 7. The data transmission interface of the displacement sensor 9 and the force sensor 7 is installed on the outside of the rear outer shell 8 and connected to the data collection device. The data transmission interface is connected to the signal receiving port of the data collection device, and is used to receive the electrical signal output by the displacement sensor and the force sensor, so as to realize data interaction with the displacement sensor and the force sensor.

[0048] In the above embodiment, the displacement sensor 9 is composed of an upper pressing plate, an equal-strength cantilever beam, a differential head, a spring inner ring, a turntable and other structures. Optionally, for example, the optional size of the displacement sensor is set to be 80 mm in overall length, 54 mm in width and 30 mm in height. When the gear selection and shifting actuator to be measured generates displacement during the gear selection and shifting action, the main shaft connected to the steel cable flexible shaft 2 will drive the differential head to generate an upward or downward displacement, and the displacement of the gear selection and shifting actuator can be obtained by monitoring the central wavelength value thereon.

[0049] In order to make the shifting process smoother and more stable. The present invention adopts a data collection device to monitor the relationship between resistance and displacement during the shifting process in real time, collect parameter changes between resistance and displacement, and make corresponding adjustments. The relationship between resistance and displacement is: during the shifting process, as the shifting displacement increases, the required shifting force (resistance) will also change. This change relationship is usually nonlinear, but can be approximated to linear within a certain range. In the initial stage, when the shifting force is less than a certain threshold, the corresponding shifting displacement is the free clearance of the shifting mechanism.

[0050] In one embodiment, according to the structural design of the displacement sensor 9, a pin, a ball head and other structures are used to connect the round hole joint 1 contained in the measuring device to the arm of the gear selection and shifting actuator to be tested; the arm is assembled on the entire test device housing, and the vertical distance between the turntable inside the displacement sensor 9 and the arm is 0.2mm, so that the sensor has a self-calibration function. The radius of the turntable is 21mm, and 8 magnets with a length of 4mm and a diameter of 2mm are evenly placed on its side. The distance between each adjacent magnet is 16.485mm. The turntable is the movable end of the arm of the extension rod corresponding to the gear selection and shifting actuator. The basic principle of the calibration device can be obtained as follows;

[0051] Where x is the displacement value after calibration, in mm; n is the total number of calibration points, n1 = the number of current calibration points - 1, and r is the turntable radius, in mm.

[0052] When the extension rod 5 starts and ends moving, the self-calibration device is located at the calibration point. By recording the maximum value point of the central wavelength change and calculating according to the above formula, the result is assigned to the displacement sensor 9 as the real-time measurement value of the displacement sensor 9, and then the measurement value is output according to the calibrated coefficient until the next calibration point is passed, and the above steps are repeated until the end.

[0053] The experimental results show that through the repeatability test of the displacement sensor, the root mean square errors of the displacement sensor before calibration are 6.279mm, 5.528mm, and 5.706mm respectively; the root mean square errors of the three round trips after calibration are 0.956mm, 0.989mm, and 0.913mm respectively. The relative error before calibration is within 5%, and the relative error after calibration is within 2%, and the measurement repeatability of the sensor has been improved.

[0054] Based on the same inventive concept, an embodiment of the present invention also provides a resistance measuring device for a gearbox shift actuator and a resistance measuring method for a gearbox shift actuator. The implementation scheme for solving the problem provided by the method is similar to the implementation scheme recorded in the above system, so the specific limitations in one or more embodiments of the resistance measuring method for a gearbox shift actuator provided below can refer to the limitations of the resistance measuring device for the gearbox shift actuator above, and will not be repeated here. It can be understood that the above description of the device is also applicable to the description of the method.

[0055] In one embodiment, Figure 2 As shown, a method for measuring the resistance of a gearbox shift actuator is provided, the method comprising:

[0056] S101 uses a predefined fixing method to fix the force sensor and displacement sensor in the same measuring device to detect the torque change and axial displacement of the preset position during the gear selection and shifting process;

[0057] S102 adjusts the gearbox so that the gear selection and shifting actuator is in a preset position, connects to a data collection device, and obtains a corresponding relationship between the force and displacement measurement data of the gear selection and shifting mechanism based on the measurement data output by the force sensor and the displacement sensor.

[0058] In the above embodiment, the detecting of the torque change and the axial displacement of the preset position during the gear selection and shifting process includes:

[0059] Adjust the measuring device so that the force sensor is in the preset position;

[0060] Select a round hole connector of corresponding size according to the gear selection and shifting actuator to be tested; connect the round hole connector to the arm of the gear selection and shifting actuator to be tested; control the outer shell and handle of the measuring device so that the measuring device is located close to the gear selection and shifting flexible shaft;

[0061] By operating the function button of the control handle, record when the outer shell of the measuring device remains stationary, and complete the recording by pushing and pulling the handle multiple times until the gear selection and shifting actuator reaches the maximum position; repeat the action until enough data is collected, and eliminate the data that deviates from the average value in the collected data.

[0062] In the above embodiment, the corresponding relationship between the force and displacement measurement data of the gear selection and shifting actuator is obtained specifically including: assuming an automatic gear shifting execution system, which is controlled by a handle PLC and is equipped with a force sensor and a displacement sensor to monitor the resistance and displacement changes during the gear selection and shifting process. In this process, a U5 series force sensor is used to measure the shifting force, and a high-precision displacement sensor is used to measure the displacement of the gear shifting. When measuring, each sensor is first installed and calibrated, and the U5 series force sensor is installed in the same test device and connected to the gear selection and shifting actuator to ensure that the sensor can accurately measure the force during the gear shifting process. For example, the displacement sensor is installed in contact with the handle of the extension rod to measure the displacement of the gear shifting to ensure the accuracy of the measurement results.

[0063] Secondly, the force and displacement sensors are connected to the external data acquisition device to receive and collect the measurement signals output by the external data acquisition device: when the PLC program is started by operating the function button, the shift handle is controlled to select and shift gears. During the shifting process, the force sensor and displacement sensor will output measurement data in real time. The data acquisition system is used to record these data for subsequent analysis.

[0064] It is understood that the data acquisition device includes a computer or a host computer, etc.; the collected force data and displacement data are recorded in the computer. The data is pre-processed, including noise removal, smoothing, etc., for example, the metal plastic deformation force generated by reaching the maximum position of the selector and shift mechanism is deleted, and the data that obviously deviates from the average value is eliminated to improve the accuracy and reliability of the data.

[0065] In addition, the corresponding relationship between the force and displacement measurement data of the gear selector actuator can be further analyzed, including:

[0066] Data alignment: Align the output measurement data in chronological order to ensure that each data point corresponds to the gear selection and shifting state at the same time.

[0067] Relationship establishment: By analyzing the aligned data, the corresponding relationship between torque (representing resistance) and displacement can be established.

[0068] The above relationship is expressed as a functional relationship, such as a linear relationship, a nonlinear relationship, etc. The specific form is determined according to the actual measurement data.

[0069] Data visualization: Use charts (such as scatter plots, line graphs, etc.) to visualize the corresponding relationship between torque and displacement, which helps to more intuitively understand the changing relationship between resistance and displacement during the gear selection and shifting process.

[0070] It is understandable that the measurement results obtained by the above measurement method can be applied to multiple scenarios of gearbox measurement. It can be used to record the measured force, displacement and their corresponding relationship, and directly output electrical signals. This can further optimize the design of the transmission shift mechanism and the vehicle shift system, and provide a measurement basis for improving the comfort of shift operation.

[0071] Specifically include the following aspects:

[0072] Performance evaluation: By analyzing the corresponding relationship between shift force and displacement, we can evaluate the performance of the shift robot. If the shift force is too large or too small, it may mean that there is a problem with the shift mechanism and it needs to be adjusted or repaired.

[0073] Optimize the shifting process: Based on the correspondence between shifting force and displacement, we can optimize the shifting process. For example, by adjusting the parameters of the shifting mechanism or improving the shifting strategy, we can reduce the shifting force and improve the shifting efficiency.

[0074] Improved transmission performance: Understanding the relationship between shift force and displacement helps us better understand the performance of the transmission. By optimizing the shift process and improving shift efficiency, we can improve the overall performance and service life of the transmission.

[0075] In summary, by actually measuring and analyzing the output data of the force sensor and displacement sensor, we can obtain the corresponding relationship between the resistance and displacement measurement data of the gear selection and shifting mechanism. This corresponding relationship is of great significance for evaluating the performance of the gear shifting manipulator, optimizing the gear shifting process, and improving the performance of the transmission.

[0076] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0077] It should be noted that the specific implementation process of a measurement method of a resistance measurement device for a gearbox shift actuator is as follows:

[0078] For small batch experimental measurements of the gear selector actuator:

[0079] 1. Fix the transmission and adjust the transmission shift actuator to the preset position;

[0080] 2. Connecting the measuring device and the data collection device; wherein the data collection device may be a computer;

[0081] 3. Adjust the measuring device to make the force sensor as centered as possible;

[0082] 4. Select the appropriate round hole connector 1 according to the selected shift actuator;

[0083] 5. Use a pin, ball head or other structure to reliably connect the round hole connector 1 of the measuring device to the gear selector arm to be measured;

[0084] 6. Hold the outer shell of the measuring device with one hand and the handle 10 of the measuring device with the other hand, so that the direction and position of the measuring device are close to the direction and position of the expected gear selection and shifting soft shaft;

[0085] 7. Operate the function buttons of the displacement sensor 9 and the force sensor 7 installed on the outside of the handle 10 to start recording;

[0086] 8. Keep the outer shell of the measuring device still, and push and pull the handle 10 times until the gear selector actuator reaches the maximum position;

[0087] 9. Operate the function buttons of the displacement sensor 9 and the force sensor 7 installed outside the handle 10 again to end the recording;

[0088] 10. Align the force sensor as closely as possible;

[0089] 11. Repeat steps 6-10 until enough data is collected;

[0090] 12. Process the data, delete the metal plastic deformation force generated by reaching the maximum position of the gear selector actuator, and eliminate the data that obviously deviates from the average value.

[0091] In one embodiment, the present application provides a test bench, comprising a resistance measuring device for a transmission shift actuator as described in any one of the first aspects.

[0092] In addition, this embodiment further provides a car, characterized in that the car is equipped with a resistance measuring device for the transmission shift actuator as described in any one of the first aspects and / or a test bench as described in the third aspect.

[0093] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present specification as above, which are not provided in detail for the sake of simplicity.

[0094] In addition, to simplify the description and discussion, and in order not to make one or more embodiments of the present specification difficult to understand, the device can be shown in the form of a block diagram, so as to avoid making one or more embodiments of the present specification difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which one or more embodiments of the present specification will be implemented (that is, these details should be fully within the scope of understanding of those skilled in the art). Where specific details (e.g., concave and convex) are set forth to describe exemplary embodiments of the present disclosure, it is obvious to those skilled in the art that one or more embodiments of the present specification can be implemented without these specific details or with changes in these specific details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0095] While the disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0096] One or more embodiments of this specification are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this specification should be included in the scope of protection of this disclosure.

Claims

1. A resistance measuring device for a gearbox shift actuator, comprising a housing, the housing comprising a front housing (4), a middle housing (6) and a rear housing (8), characterized in that: The front outer shell (4), the middle outer shell (6) and the rear outer shell (8) are connected in sequence, and the front end of the front outer shell (4) is fixedly connected with a dust cover (3), and a steel cable flexible shaft (2) runs through between the dust cover (3) and the front outer shell (4), and generates elastic resistance when it moves toward the front outer shell (4); One end of the steel cable flexible shaft (2) is threadedly connected to a round hole connector (1), and the other end of the steel cable flexible shaft (2) is threadedly connected to an extension rod (5), one end of the extension rod (5) is threadedly connected to a force sensor (7), and one end of the force sensor (7) is threadedly connected to a handle (10) away from the extension rod (5); when the extension rod (5) generates elastic resistance due to linear motion of the handle (10), the force sensor (7) is used to detect torque changes during the gear selection and shifting process; A displacement sensor (9) is fixedly mounted on the inner side of the rear outer shell (8) near the bottom, and a detection end of the displacement sensor (9) is in contact with a handle (10) to detect axial displacement during gear selection and shifting.

2. The resistance measuring device of a gearbox shift actuator according to claim 1, characterized in that: The inner sides of the opposite surfaces of the front outer shell (4) and the rear outer shell (8) are integrally connected with a card seat, and both ends of the middle outer shell (6) are fixedly connected with a card block, and the two card blocks are respectively engaged with the two card seats.

3. The resistance measuring device of a gearbox shift actuator according to claim 1, characterized in that: Nuts are fixedly mounted on both ends of the steel cable flexible shaft (2), the inner diameter of the nuts is larger than the outer diameter of the steel cable flexible shaft (2), and the two nuts are respectively threadedly connected to the round hole connector (1) and the extension rod (5).

4. The resistance measuring device of a gearbox shift actuator according to claim 1, characterized in that: The outer contour of the dust cover (3) is arranged in a wave shape.

5. The resistance measuring device of a gearbox shift actuator according to claim 1, characterized in that: The outer surface of the handle (10) is provided with a plurality of mounting holes, and the mounting holes are used to mount function buttons for controlling the displacement sensor (9) and the force sensor (7).

6. The resistance measuring device of a gearbox shift actuator according to claim 5, characterized in that: The outer surface of the rear outer shell (8) is provided with a through hole, and the through hole is used to install the data transmission interface of the displacement sensor (9) and the force sensor (7); the data transmission interface is connected to the signal receiving port of the data collection device, and is used to receive the electrical signals output by the displacement sensor (9) and the force sensor (7), so as to realize data interaction with the displacement sensor (9) and the force sensor (7).

7. A method for measuring the resistance of a gearbox shift actuator, characterized in that: The method comprises: The force sensor and the displacement sensor are fixed in the same measuring device by a predefined fixing method to detect the torque change and the axial displacement of the preset position during the gear selection and shifting process; The gear selector and shift actuator is adjusted to a preset position, and a data collection device is connected to obtain the corresponding relationship between the force and displacement measurement data of the gear selector and shift actuator based on the measurement data output by the force sensor and the displacement sensor.

8. The method for measuring the resistance of a gearbox shift actuator according to claim 7, characterized in that: The detecting of the torque change and the axial displacement of the preset position during the gear selection and shifting process includes: Adjust the measuring device so that the force sensor is in the preset position; Select a round hole connector of corresponding size according to the gear selection and shifting actuator to be tested; connect the round hole connector to the arm of the gear selection and shifting actuator to be tested; control the outer shell and handle of the measuring device so that the measuring device is located close to the gear selection and shifting flexible shaft; By operating the function button of the control handle, record when the outer shell of the measuring device remains stationary, and complete the recording by pushing and pulling the handle multiple times until the gear selection and shifting actuator reaches the maximum position; repeat the action until enough data is collected, and eliminate the data that deviates from the average value in the collected data.

9. A test bench, characterized in that: The invention comprises a resistance measuring device of a gearbox shifting actuator as claimed in any one of claims 1 to 6.

10. An automobile, characterized in that: The vehicle is equipped with a resistance measuring device for a transmission shift actuator as claimed in any one of claims 1 to 6 and / or a test bench as claimed in claim 9.

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