Adjustable automobile half-axle torsion detection device and method

Abstract

An adjustable automobile half-axle torsion detection device and method, belonging to the field of automobile half-axle torsion technology, solves the problem that the existing detection device cannot ensure the coaxiality of the half-axle and the two ends of the test stand, affects the torsion fatigue life of the half-axle, and the operation process is relatively cumbersome. The tailstock is slidably connected to the platform track; the adjustment bracket is slidably connected to the bracket track; the adjustment bracket screw is connected to the adjustment bracket; the displacement sensor is fixed on the adjustment bracket; the pressure sensor is connected to the left screw of the adjustment bracket; the reinforcement vertical plate is welded on the tailstock; the marking needle and digital display dial indicator are slidably connected to the cross bar; the actuator square groove is fixed on the torsion actuator; the cross plate is slidably connected to the cross plate track, and the cross plate is connected to the tailstock screw; the vertical plate is slidably connected to the vertical plate track; the torsion actuator, platform track and bracket track are all fixed on the platform.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle half-axle torsion, and in particular to an adjustable vehicle half-axle torsion detection device and method. Background Art

[0002] The half-shaft is an important torque transmitting component in the automobile. Its fatigue performance affects driving safety. During the research and development process, the half-shaft needs to be tested for torsional fatigue performance.

[0003] At present, when conducting torsional fatigue tests on automobile half-axles, the industry standard QC / T 293-1999 "Automobile Half-axle Bench Test Method" is usually followed. During the test, the output end of the half-axle needs to be fixed and a reciprocating torsional torque needs to be applied to the input end of the half-axle. At present, most of the benches used for the test are horizontal torsional fatigue testing machines. During the long-term use of such benches, the fixed base connected to the output end of the half-axle will be deformed due to long-term impact. In addition, since the base is often moved for adjustment during the installation of the half-axle, the base and the slideway at the output end will be severely worn, which will eventually reduce the bench accuracy and make it impossible to ensure the coaxiality of the half-axle and the two ends of the bench. After the half-axle is installed on the bench in this state, the half-axle will be deformed, so that the spline end of the half-axle will be subjected to excessive shear stress, and some key teeth will be subjected to excessive extrusion stress, thereby affecting the torsional fatigue life of the half-axle. At the same time, this type of test machine currently lacks the half-axle detection function. The half-axle after the test needs to be removed from the bench and transferred to the detection platform, which is a cumbersome process.

[0004] The defects of the existing detection device are:

[0005] 1) The coaxiality between the half-axis and the two ends of the gantry cannot be guaranteed;

[0006] 2) Affects the torsional fatigue life of the half shaft;

[0007] 3) The operation process is rather complicated.

[0008] Prior art: Patent document CN102494883B discloses "a bench and detection method for detecting the bending fatigue life of automobile half-axles", which simulates the pulsating force loaded on the loading arm under the condition of driving on an S-curve road to simulate the half-axle subjected to lateral force for testing. The test detects the ability of the half-axle to resist lateral bending fatigue and determines the fatigue fracture of the half-axle in advance. Patent document CN106017888B discloses "a semi-floating half-axle rotation bending fatigue bench test device", which can cover the semi-floating half-axle rotation bending fatigue bench test requirements of mini cars and passenger cars, because it comprehensively considers the influence of the ground vertical support bending moment and the ground attachment bending moment on the semi-floating half-axle rotation bending fatigue life, and has the advantages of adjustable loading torque, high precision, simple structure, low equipment manufacturing and operation cost, convenient operation, and safe and reliable operation.

[0009] In summary, the existing detection device cannot ensure the coaxiality between the half-shaft and the two ends of the test stand, affects the torsional fatigue life of the half-shaft, and the operation process is relatively cumbersome. Summary of the invention

[0010] The invention solves the problems that the existing detection device cannot ensure the coaxiality between the half shaft and the two ends of the stand, affects the torsional fatigue life of the half shaft, and the operation process is relatively complicated.

[0011] The adjustable automobile half-axle torsion detection device of the present invention comprises a tailstock 1, an adjustment bracket 3, a crossbar 4, a torsion actuator 6, a cross plate track 7, a vertical plate track 8, a platform track 9, a bracket track 10, a tailstock screw rod, an adjustment bracket screw rod, a displacement sensor, a pressure sensor, a reinforcement vertical plate 22, a platform 23, a stylus 24, a digital display dial indicator 25, an actuator square groove 26, a cross plate 27 and a vertical plate 28;

[0012] The tail frame 1 is slidably connected to the platform track 9;

[0013] The adjusting bracket 3 is slidably connected to the bracket rail 10;

[0014] The adjusting bracket screw rod is connected to the adjusting bracket 3;

[0015] The displacement sensor is fixed on the adjustment bracket 3;

[0016] The pressure sensor is connected to the left screw rod 14 of the adjustment bracket;

[0017] The reinforcing vertical plate 22 is welded on the tail frame 1;

[0018] The marking needle 24 and the digital dial indicator 25 are slidably connected to the crossbar 4;

[0019] The actuator square slot 26 is fixed on the torsion actuator 6;

[0020] The cross plate 27 is slidably connected to the cross plate track 7, and the cross plate 27 is connected to the tailstock screw rod;

[0021] The vertical plate 28 is slidably connected to the vertical plate track 8;

[0022] The torsion actuator 6 , the platform rail 9 and the bracket rail 10 are all fixed on the platform 23 .

[0023] Further, in one embodiment of the present invention, the testing device further comprises a locking pin 29, a bearing flange 30, a positioning bolt 31 and a positioning cylinder 32;

[0024] The locking pin 29 is connected to the shaft hole of the bearing flange 30;

[0025] The positioning bolt 31 is connected to the positioning cylinder 32 .

[0026] Further, in one embodiment of the present invention, the adjusting bracket screw rod comprises an adjusting bracket left screw rod 14, an adjusting bracket right screw rod 15, and an adjusting bracket bottom screw rod 16;

[0027] The left screw rod 14 of the adjustment bracket, the right screw rod 15 of the adjustment bracket and the bottom screw rod 16 of the adjustment bracket can move the adjustment bracket 3 in the horizontal and vertical directions.

[0028] Further, in one embodiment of the present invention, the displacement sensor includes a horizontal displacement sensor 17 and a vertical displacement sensor 18;

[0029] The horizontal displacement sensor 17 and the vertical displacement sensor 18 are both contact displacement sensors;

[0030] The horizontal displacement sensor 17 and the vertical displacement sensor 18 measure the displacement of the half shaft 2 in the horizontal direction and the vertical direction respectively.

[0031] Further, in one embodiment of the present invention, the pressure sensor includes a left pressure sensor 19, a bottom pressure sensor 20 and a right pressure sensor 21;

[0032] According to the left pressure data, right pressure data and bottom pressure data of the half-shaft 2 measured by the left pressure sensor 19, the bottom pressure sensor 20 and the right pressure sensor 21, the adjustment bracket screw can be adjusted to the center position of the half-shaft 2 in the horizontal direction.

[0033] Further, in one embodiment of the present invention, the tailstock screw rod comprises a tailstock left screw rod 11, a tailstock right screw rod 12 and a tailstock bottom screw rod 13;

[0034] The tailstock left side screw rod 11, the tailstock right side screw rod 12 and the tailstock bottom screw rod 13 can move the cross plate 27 in horizontal and vertical directions.

[0035] The adjustable automobile half-axle torsion detection method of the present invention is implemented by using the adjustable automobile half-axle torsion detection device described in the above method, and comprises the following steps:

[0036] Step S1, weigh the spline sleeve 5 and record its value G1, then install it into the actuator square groove 26, and then connect the spline end of the half shaft 2 to the spline sleeve 5;

[0037] Step S2, after adjusting the torsion test device of the automobile half shaft 2, use the marking needle 24 to mark a straight line L1 on the half shaft 2;

[0038] Step S3, after setting the test parameters of the torsion actuator 6, a torsion fatigue test is performed. After the test is completed, the torsion actuator 6 is rotated to the initial rotation angle, and a straight line L2 is drawn on the half shaft 2 using the stylus 24 to roughly determine the torsion deformation of the half shaft 2;

[0039] Step S4, moving the tailstock 1 backward to remove the half shaft 2 from the spline sleeve 5, collecting the iron filings worn away by the spline sleeve 5 and the half shaft 2, weighing the iron filings and the spline sleeve 5 respectively and recording them as data G2 and G3, and calculating the wear mass of the spline sleeve 5 and the half shaft 2;

[0040] Step S5, remove the locking pin 29, rotate the bearing flange 30, and cooperate with the digital dial indicator 25 to complete the half-shaft 2 runout detection process. The half-shaft 2 after the test is completed is detected by three methods: mass loss, marking line deviation and runout detection.

[0041] Further, in one embodiment of the present invention, the adjusting of the automobile half-axle torsion testing device comprises the following steps:

[0042] Step S201, roughly adjusting the adjustment bracket 3 along the bracket track 10 to the middle section of the half shaft 2, and adjusting the value of the vertical displacement sensor 18 in this state to zero through software;

[0043] Step S202, adjusting the horizontal and vertical directions of the half-shaft 2 to a centered state by adjusting the displacement sensor, the pressure sensor and the support screw;

[0044] Step S203, by adjusting the positions of the tail frame 1, the transverse plate 27 and the vertical plate 28, aligning the connecting bearing flange 30 and the half shaft 2, and fixing the bearing flange 30 on the vertical plate 28 with the locking pin 29, thereby completing the adjustment of the half shaft 2 torsion test device.

[0045] Further, in one embodiment of the present invention, the torsional deformation of the half shaft 2 is roughly determined by comparing the offset of L1 relative to L2.

[0046] Further, in one embodiment of the present invention, the calculated wear mass of the spline sleeve 5 and the half shaft 2 is:

[0047] G1 minus G3 is recorded as G4, which is the wear mass of the spline sleeve 5, and G2 minus G4 is the wear mass of the half shaft 2.

[0048] The present invention solves the problem that the existing detection device cannot ensure the coaxiality between the half shaft and the two ends of the stand, affects the torsional fatigue life of the half shaft, and the operation process is relatively cumbersome. Specific beneficial effects include:

[0049] 1. The adjustable automobile half-axle torsion detection device described in the present invention provides an adjustable detection device, which includes an adjustment bracket and an adjustable tail bracket, and the half-axle and the detection device can be adjusted to a state with a higher coaxiality to ensure that the state of the half-axle on the test bench is consistent with the state of the whole vehicle. The detection device adds a half-axle detection function and has a matching detection method, which can perform routine detection on the half-axle after the test.

[0050] 2. The adjustable automobile half-axle torsion detection device described in the present invention welds the reinforcing vertical plate to the tail frame to achieve the purpose of strengthening the structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0052] Figure 1 It is a side view of the adjustable automobile half-axle torsion detection device described in a specific implementation method, 1 is the tail frame, 2 is the half-axle, 3 is the adjustment bracket, 4 is the cross bar, 5 is the spline sleeve, 6 is the torsion actuator, and 31 is the positioning bolt.

[0053] Figure 2 7 is a diagram of an adjustable automobile half-axle torsion detection device described in a specific implementation method, 7 is a horizontal plate track, 8 is a vertical plate track, 9 is a platform track, 10 is a bracket track, 11 is a screw rod on the left side of the tailstock, 12 is a screw rod on the right side of the tailstock, 13 is a screw rod at the bottom of the tailstock, 14 is a screw rod on the left side of the adjustment bracket, 15 is a screw rod on the right side of the adjustment bracket, 16 is a screw rod at the bottom of the adjustment bracket, 27 is a horizontal plate, 28 is a vertical plate, 29 is a locking pin, and 30 is a bearing flange.

[0054] Figure 3 It is a diagram of an adjustable automobile half-axle torsion detection device according to a specific implementation method, 22 is a reinforcing vertical plate, 23 is a platform, 24 is a marking needle, 25 is a digital dial indicator, and 26 is an actuator square groove.

[0055] Figure 4 17 is a diagram of an adjustable automobile half-axle torsion detection device according to a specific implementation method, 18 is a vertical displacement sensor, 19 is a left pressure sensor, 20 is a bottom pressure sensor, and 21 is a right pressure sensor.

[0056] Figure 5 It is an enlarged view of the positioning bolt described in the specific implementation method, and 32 is a positioning cylinder.

[0057] Figure 6 is a diagram of the relationship between pressure and displacement described in a specific implementation manner. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe various embodiments of the present invention in conjunction with the accompanying drawings. The embodiments described with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0059] The adjustable automobile half-axle torsion detection device described in this embodiment includes a tailstock 1, an adjustment bracket 3, a crossbar 4, a torsion actuator 6, a cross plate track 7, a vertical plate track 8, a platform track 9, a bracket track 10, a tailstock screw rod, an adjustment bracket screw rod, a displacement sensor, a pressure sensor, a reinforcement vertical plate 22, a platform 23, a stylus 24, a digital display dial indicator 25, an actuator square groove 26, a cross plate 27 and a vertical plate 28;

[0060] The tail frame 1 is slidably connected to the platform track 9;

[0061] The adjusting bracket 3 is slidably connected to the bracket rail 10;

[0062] The adjusting bracket screw rod is connected to the adjusting bracket 3;

[0063] The displacement sensor is fixed on the adjustment bracket 3;

[0064] The pressure sensor is connected to the left screw rod 14 of the adjustment bracket;

[0065] The reinforcing vertical plate 22 is welded on the tail frame 1;

[0066] The marking needle 24 and the digital dial indicator 25 are slidably connected to the crossbar 4;

[0067] The actuator square slot 26 is fixed on the torsion actuator 6;

[0068] The cross plate 27 is slidably connected to the cross plate track 7, and the cross plate 27 is connected to the tailstock screw rod;

[0069] The vertical plate 28 is slidably connected to the vertical plate track 8;

[0070] The torsion actuator 6 , the platform rail 9 and the bracket rail 10 are all fixed on the platform 23 .

[0071] In this embodiment, the testing device further includes a locking pin 29, a bearing flange 30, a positioning bolt 31 and a positioning cylinder 32;

[0072] The locking pin 29 is connected to the shaft hole of the bearing flange 30;

[0073] The positioning bolt 31 is connected to the positioning cylinder 32 .

[0074] In this embodiment, the adjusting bracket screw rod includes an adjusting bracket left screw rod 14, an adjusting bracket right screw rod 15, and an adjusting bracket bottom screw rod 16;

[0075] The left screw rod 14 of the adjustment bracket, the right screw rod 15 of the adjustment bracket and the bottom screw rod 16 of the adjustment bracket can move the adjustment bracket 3 in the horizontal and vertical directions.

[0076] In this embodiment, the displacement sensor includes a horizontal displacement sensor 17 and a vertical displacement sensor 18;

[0077] The horizontal displacement sensor 17 and the vertical displacement sensor 18 are both contact displacement sensors;

[0078] The horizontal displacement sensor 17 and the vertical displacement sensor 18 measure the displacement of the half shaft 2 in the horizontal direction and the vertical direction respectively.

[0079] In this embodiment, the pressure sensors include a left pressure sensor 19, a bottom pressure sensor 20 and a right pressure sensor 21;

[0080] According to the left pressure data, right pressure data and bottom pressure data of the half-shaft 2 measured by the left pressure sensor 19, the bottom pressure sensor 20 and the right pressure sensor 21, the adjustment bracket screw can be adjusted to the center position of the half-shaft 2 in the horizontal direction.

[0081] In this embodiment, the tailstock screw rods include a tailstock left screw rod 11, a tailstock right screw rod 12 and a tailstock bottom screw rod 13;

[0082] The tailstock left side screw rod 11, the tailstock right side screw rod 12 and the tailstock bottom screw rod 13 can move the cross plate 27 in horizontal and vertical directions.

[0083] The adjustable automobile half-axle torsion detection method described in this embodiment is implemented by using the adjustable automobile half-axle torsion detection device described in the above embodiment, and comprises the following steps:

[0084] Step S1, weigh the spline sleeve 5 and record its value G1, then install it into the actuator square groove 26, and then connect the spline end of the half shaft 2 to the spline sleeve 5;

[0085] Step S2, after adjusting the torsion test device of the automobile half shaft 2, use the marking needle 24 to mark a straight line L1 on the half shaft 2;

[0086] Step S3, after setting the test parameters of the torsion actuator 6, a torsion fatigue test is performed. After the test is completed, the torsion actuator 6 is rotated to the initial rotation angle, and a straight line L2 is drawn on the half shaft 2 using the stylus 24 to roughly determine the torsion deformation of the half shaft 2;

[0087] Step S4, moving the tailstock 1 backward to remove the half shaft 2 from the spline sleeve 5, collecting the iron filings worn away by the spline sleeve 5 and the half shaft 2, weighing the iron filings and the spline sleeve 5 respectively and recording them as data G2 and G3, and calculating the wear mass of the spline sleeve 5 and the half shaft 2;

[0088] Step S5, remove the locking pin 29, rotate the bearing flange 30, and cooperate with the digital dial indicator 25 to complete the half-shaft 2 runout detection process. The half-shaft 2 after the test is completed is detected by three methods: mass loss, marking line deviation and runout detection.

[0089] In this embodiment, the adjustment of the automobile half-axle torsion testing device includes the following steps:

[0090] Step S201, roughly adjusting the adjustment bracket 3 along the bracket track 10 to the middle section of the half shaft 2, and adjusting the value of the vertical displacement sensor 18 in this state to zero through software;

[0091] Step S202, adjusting the horizontal and vertical directions of the half-shaft 2 to a centered state by adjusting the displacement sensor, the pressure sensor and the support screw;

[0092] Step S203, by adjusting the positions of the tail frame 1, the transverse plate 27 and the vertical plate 28, aligning the connecting bearing flange 30 and the half shaft 2, and fixing the bearing flange 30 on the vertical plate 28 with the locking pin 29, thereby completing the adjustment of the half shaft 2 torsion test device.

[0093] In this embodiment, the torsional deformation of the half shaft 2 is roughly determined by comparing the offset of L1 relative to L2.

[0094] In this embodiment, the calculated wear mass of the spline sleeve 5 and the half shaft 2 is:

[0095] G1 minus G3 is recorded as G4, which is the wear mass of the spline sleeve 5, and G2 minus G4 is the wear mass of the half shaft 2.

[0096] This embodiment is based on an adjustable automobile half-axle torsion detection device according to the present invention, combined with Figure 1-5 To better understand this implementation, a practical implementation is provided:

[0097] The tail frame 1 moves forward and backward along the platform track 9. After moving to a corresponding position, the tail frame 1 can be fixed on the platform 23 by bolts.

[0098] The adjustment bracket 3 can be moved forward and backward along the bracket track 10 and is fixed with matching bolts;

[0099] The cross plate 27 can move left and right along the cross plate track 7 and is fixed with matching bolts;

[0100] The vertical plate 28 can move up and down along the vertical plate track 8 and is fixed with matching bolts;

[0101] The rightward movement adjustment of the horizontal plate 27 is completed by rotating the screw rod 11 on the left side of the tailstock. The screw rod is rotated clockwise to move the screw rod to the right, and at the same time, the screw rod pushes the horizontal plate 27 to move to the right;

[0102] The leftward movement adjustment of the horizontal plate 27 is completed by rotating the screw rod 12 on the right side of the tailstock. The screw rod is rotated counterclockwise to move the screw rod to the left, and at the same time, the screw rod pushes the horizontal plate 27 to move to the left;

[0103] The upward movement adjustment of the cross plate 27 is completed by rotating the screw rod 13 at the bottom of the tailstock. The screw rod is rotated clockwise to move the screw rod upward, and the screw rod pushes the cross plate 27 upward. When the cross plate 27 moves downward, the screw rod needs to be rotated counterclockwise. The cross plate 27 will move downward along the slideway due to gravity.

[0104] The marking needle 24 and the digital dial indicator 25 can be moved forward and backward on the crossbar 4, and after the position is moved, the position can be locked by the corresponding locking nut;

[0105] The left screw rod 14 of the adjusting bracket, the right screw rod 15 of the adjusting bracket and the bottom screw rod 16 of the adjusting bracket are threadedly connected to the adjusting bracket 3, and the left pressure sensor 19, the bottom pressure sensor 20 and the right pressure sensor 21 are respectively connected to the front ends of the left screw rod 14 of the adjusting bracket, the bottom screw rod 16 of the adjusting bracket and the right screw rod 15 of the adjusting bracket;

[0106] The horizontal displacement sensor 17 and the vertical displacement sensor 18 adopt contact displacement sensors, which are fixed on the adjustment bracket 3, and respectively measure the displacement of the half shaft 2 in the horizontal (left and right) and vertical (up and down) directions;

[0107] The left screw rod 14 of the adjustment bracket is used to adjust the semi-axis to the right, the right screw rod 15 of the adjustment bracket is used to adjust the semi-axis to the left, and the bottom screw rod 16 of the adjustment bracket is used to adjust the semi-axis to move up and down. The adjustment method is the same as the movement adjustment of the horizontal plate 27, which will not be repeated here;

[0108] The reinforcing plate 22 is welded on the tail frame 1 to strengthen the structural stability;

[0109] The locking pin 29 and the bearing flange 30 are matched with each other in the shaft hole, and the locking pin can lock the bearing flange on the tail frame to ensure that the flange stops rotating;

[0110] The spline sleeve 5 and the actuator square groove 26 are clearance-matched, and the spline sleeve 5 can be directly installed into the square groove.

[0111] This embodiment provides a practical implementation method based on an adjustable automobile half-axle torsion detection method described in the present invention:

[0112] The left pressure sensor 19, the bottom pressure sensor 20, the right pressure sensor 21, the horizontal displacement sensor 17 and the vertical displacement sensor 18 can all be matched with the HBM QuantumX data acquisition system, and the collected data can be analyzed and processed by the catman data acquisition software;

[0113] In the adjustment process, the spline sleeve 5 is first weighed and the value is recorded as G1, and then it is installed into the square groove 26 of the actuator, and then the spline end of the half shaft 2 is connected to the spline sleeve 5 to complete the preliminary work;

[0114] The adjustment bracket 3 carrying the sensor is roughly adjusted along the track to the middle section of the half-axis and the matching bolts are used to fix the position of the bracket. The value of the vertical displacement sensor 18 in this state is adjusted to zero using the catman software;

[0115] First, adjust the middle position of the half shaft 2 relative to the spline sleeve 5 in the vertical (up and down) direction. First, adjust the bottom screw 16 of the bracket by rotating it clockwise and drive the bottom pressure sensor 20 to push the half shaft 2 upward. At the same time, record the data of the bottom pressure sensor 20 and the vertical displacement sensor 18 in the catman software and draw them as shown in Figure 5:

[0116] Figure 5 The red part in the middle circle is a process in which a stable pressure pushes the half-shaft to move. The pressure value recorded at this time is F1. At the same time, continue to rotate the screw rod 16 at the bottom of the adjustment bracket clockwise to lift the half-shaft until the pressure is 2 times F1. The value of the vertical displacement sensor 18 at this time is recorded as S1. Rotate the screw rod 16 at the bottom of the adjustment bracket counterclockwise to slowly lower the half-shaft until the value of the vertical displacement sensor 18 is 1 / 2 of S1. Keep the screw rod still. At this time, it is considered that the position of the half-shaft 2 in the vertical direction is in the center position;

[0117] Adjust the middle position of the semi-shaft in the horizontal (left and right) direction, rotate the left screw 14 of the adjustment bracket clockwise to push the semi-shaft to the right, until the value of the left pressure sensor 19 reaches F1, and adjust the value of the horizontal displacement sensor 17 at this time to zero on the catman software, return the left screw 14 of the adjustment bracket, and then rotate the right screw 15 of the adjustment bracket clockwise to push the semi-shaft to the left, until the value of the right pressure sensor 21 reaches F1, record the value S2 of the horizontal displacement sensor 17 at this time, adjust the position value of the semi-shaft in the horizontal direction to 1 / 2 of S2, at this time, it is considered that the semi-shaft 2 is in the middle position both horizontally and vertically, and the semi-shaft 2 reaches a coaxial state relative to the spline sleeve 5. At this time, the semi-shaft 2 is fixed in a central position by adjusting the left screw 14 of the adjustment bracket, clamping the right screw 15 of the adjustment bracket, and supporting the bottom screw 16 of the adjustment bracket;

[0118] By adjusting the positions of the tailstock 1 and the horizontal plate 27 and the vertical plate 28, the bearing flange 30 and the half shaft 2 are aligned. At this time, the positioning bolt 31 is used to ensure the alignment accuracy. The positioning cylinder 32 of the positioning bolt 31 is usually made to have a diameter smaller than the diameter of the half shaft bolt hole by 0.01mm. By observing and adjusting, it is ensured that the positioning bolt 31 is smoothly screwed into the bearing flange 30 without obstruction and the indications of the horizontal displacement sensor 17 and the vertical displacement sensor 18 do not change during the adjustment, which is considered to be the successful completion of the adjustment process;

[0119] Use the locking pin 29 to fix the bearing flange 30 on the vertical plate 28, and the entire adjustment process is completed;

[0120] The semi-axle detection method is as follows: after the adjustment process, the rotation angle of the host computer operating system of the torsion actuator 6 is recorded, and the initial rotation angle is located, and a straight line L1 is drawn on the semi-axle 2 with a stylus 24;

[0121] Setting the test parameters of the torsion actuator 6, including the test torque, rotation angle, frequency, etc., to perform a torsion fatigue test;

[0122] After the test is completed, the torsion actuator 6 is rotated to the initial rotation angle, and a straight line L2 is drawn on the half shaft 2 using the stylus 24. By comparing the offset of L1 relative to L2, the torsion deformation of the half shaft 2 can be roughly determined;

[0123] The tailstock 1 is moved backward to remove the half shaft 2 from the spline sleeve 5, and the iron chips worn away by the spline sleeve 5 and the half shaft 2 are collected. The iron chips are weighed and recorded as G2, and the weight of the spline sleeve 5 after the test is weighed as G3. The initial weight of the spline sleeve 5 is G1, G1 minus G3 is recorded as G4, which is the wear mass of the spline sleeve 5, and G2 minus G4 is the wear mass of the half shaft 2;

[0124] Remove the locking pin 29, rotate the bearing flange 30, and cooperate with the digital dial indicator 25 to complete the half-shaft 2 runout detection process. At this point, the half-shaft 2 is detected and judged through the three steps of "quality loss", "marking line offset" and "runout detection".

[0125] At present, most solutions to ensure the coaxiality of the transmission shaft and the test sample (transmission, reducer, etc.) are to ensure it through the design size of the "fixed fixture". By applying the adjustment scheme of the present invention, the "fixed" type can be transformed into an "adjustable" type. By using a set of "adjustable" fixtures, a variety of test samples can be matched, thereby reducing the manufacturing cost of the fixture.

[0126] The above is a detailed introduction to an adjustable automobile half-axle torsion detection device and method proposed in the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for detecting the torsion of an adjustable automobile half-axle, wherein the method is implemented by using an adjustable automobile half-axle torsion detection device, characterized in that: The detection device comprises a tailstock (1), an adjustment bracket (3), a crossbar (4), a torsion actuator (6), a cross plate track (7), a vertical plate track (8), a platform track (9), a bracket track (10), a tailstock screw rod, an adjustment bracket screw rod, a displacement sensor, a pressure sensor, a reinforcing vertical plate (22), a platform (23), a marking needle (24), a digital dial indicator (25), an actuator square groove (26), a cross plate (27) and a vertical plate (28); The tail frame (1) is slidably connected to the platform track (9); The adjustment bracket (3) is slidably connected to the bracket rail (10); The adjusting bracket screw rod is connected to the adjusting bracket (3); The displacement sensor is fixed on the adjustment bracket (3); The pressure sensor is connected to the left screw rod (14) of the adjustment bracket; The reinforcing vertical plate (22) is welded to the tail frame (1); The marking needle (24) and the digital dial indicator (25) are slidably connected to the crossbar (4); The actuator square groove (26) is fixed on the torsion actuator (6); The cross plate (27) is slidably connected to the cross plate track (7), and the cross plate (27) is connected to the tailstock screw rod; The vertical plate (28) is slidably connected to the vertical plate track (8); The torsion actuator (6), the platform track (9) and the bracket track (10) are all fixed on the platform (23); The following steps are involved: Step S1, weigh the spline sleeve (5) and record its value G1, then install it into the actuator square groove (26), and then connect the spline end of the half shaft (2) to the spline sleeve (5); Step S2, after adjusting the torsion test device of the automobile half shaft (2), use a marking needle (24) to mark a straight line L1 on the half shaft (2); Step S3, after setting the test parameters of the torsion actuator (6), a torsion fatigue test is performed. After the test is completed, the torsion actuator (6) is rotated to the initial rotation angle, and a straight line L2 is drawn on the semi-shaft (2) using a stylus (24) to roughly determine the torsion deformation of the semi-shaft (2); Step S4, moving the tailstock (1) backward to remove the half shaft (2) from the spline sleeve (5), collecting iron filings worn away by the spline sleeve (5) and the half shaft (2), weighing the iron filings and the spline sleeve (5) respectively and recording them as data G2 and G3, and calculating the wear mass of the spline sleeve (5) and the half shaft (2); Step S5, remove the locking pin (29), rotate the bearing flange (30), and cooperate with the digital dial indicator (25) to complete the half-shaft (2) runout detection process. The half-shaft (2) after the test is completed is detected by three methods: mass loss, marking line deviation and runout detection.

2. The adjustable automobile half-axle torsion detection method according to claim 1 is characterized in that: The testing device also includes a locking pin (29), a bearing flange (30), a positioning bolt (31) and a positioning cylinder (32); The locking pin (29) is connected to the shaft hole of the bearing flange (30); The positioning bolt (31) is connected to the positioning cylinder (32).

3. The adjustable automobile half-axle torsion detection method according to claim 1 is characterized in that: The adjusting bracket screw rod comprises an adjusting bracket left screw rod (14), an adjusting bracket right screw rod (15), and an adjusting bracket bottom screw rod (16); The left screw rod (14) of the adjustment bracket, the right screw rod (15) of the adjustment bracket and the bottom screw rod (16) of the adjustment bracket can move the adjustment bracket (3) in the horizontal and vertical directions.

4. The adjustable automobile half-axle torsion detection method according to claim 1 is characterized in that: The displacement sensor comprises a horizontal displacement sensor (17) and a vertical displacement sensor (18); The horizontal displacement sensor (17) and the vertical displacement sensor (18) are both contact displacement sensors; The horizontal displacement sensor (17) and the vertical displacement sensor (18) respectively measure the displacement of the semi-axle (2) in the horizontal and vertical directions.

5. The adjustable automobile half-axle torsion detection method according to claim 1, characterized in that: The pressure sensor comprises a left pressure sensor (19), a bottom pressure sensor (20) and a right pressure sensor (21); By adjusting the support screw rod based on the left side pressure data, the right side pressure data and the bottom pressure data of the half shaft (2) measured by the left side pressure sensor (19), the bottom pressure sensor (20) and the right side pressure sensor (21), the half shaft (2) can be adjusted to a central position in the horizontal direction.

6. The adjustable automobile half-axle torsion detection method according to claim 1, characterized in that: The tailstock screw rods include a tailstock left screw rod (11), a tailstock right screw rod (12) and a tailstock bottom screw rod (13); The tailstock left side screw rod (11), the tailstock right side screw rod (12) and the tailstock bottom screw rod (13) are capable of moving the cross plate (27) in the horizontal and vertical directions.

7. The adjustable automobile half-axle torsion detection method according to claim 1, characterized in that: The step of adjusting the automobile half-axle torsion testing device comprises the following steps: Step S201, roughly adjusting the adjustment bracket (3) along the bracket track (10) to the middle section of the half shaft (2), and adjusting the value of the vertical displacement sensor (18) in this state to zero through software; Step S202, adjusting the horizontal and vertical directions of the half shaft (2) to a centered state by adjusting the displacement sensor, the pressure sensor and the adjusting support screw; Step S203, by adjusting the positions of the tail frame (1) and the transverse plate (27) and the vertical plate (28), aligning the connecting bearing flange (30) and the half shaft (2), and fixing the bearing flange (30) on the vertical plate (28) with a locking pin (29), thereby completing the adjustment of the half shaft (2) torsion test device.

8. The adjustable automobile half-axle torsion detection method according to claim 1, characterized in that: The torsional deformation of the half shaft (2) is roughly determined by comparing the offset of L1 relative to L2.

9. The adjustable automobile half-axle torsion detection method according to claim 1, characterized in that: The calculated wear mass of the spline sleeve (5) and the half shaft (2) is: G1 minus G3 is recorded as G4, which is the wear mass of the spline sleeve (5), and G2 minus G4 is the wear mass of the half shaft (2).

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