A device for detecting the unit torque rigidity of a hub axle tube of an automobile

Abstract

The application relates to the technical field of hub axle pipe detection, in particular to a device for detecting the torque rigidity of an automobile hub axle pipe unit, which comprises a mounting seat, a supporting mechanism is fixedly installed at the top of the mounting seat, a hub axle pipe unit is placed at the top end of the supporting mechanism, a positioning mechanism is installed on the outer edge of the hub axle pipe unit so as to fix the positioning mechanism on the supporting mechanism, an axial test mechanism is installed at one end of the top of the hub axle pipe unit so as to detect the axial torque rigidity value of the hub axle pipe unit, a radial test structure is installed at the other end of the top of the hub axle pipe unit so as to detect the radial torque rigidity value of the hub axle pipe unit, and a differential transformer type displacement sensor is fixedly installed at the top of the hub axle pipe unit so as to detect the inclination of the hub axle pipe unit. The application can keep the bottom of the hub axle pipe unit stable, and thus can ensure the normal detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hub axle pipe detection, and particularly relates to a device for detecting torque rigidity of a hub axle pipe unit of an automobile. BACKGROUND

[0002] Torque rigidity of a hub bearing unit of an automobile significantly affects driving comfort, steering stability and safety of the automobile. With the rapid development of the automobile industry, the test research on torque rigidity of the hub bearing unit of the automobile has attracted more and more attention. The traditional test method is rough, and the applied load and torque cannot accurately and truly simulate the force form of the hub unit of the automobile. The test data obtained by using a dial gauge or a micrometer has a large error range and discreteness.

[0003] To this end, a patent with the publication number CN200810237312.9 discloses a test method for torque rigidity of a hub bearing unit of an automobile. In the test method, an inner flange plate of the hub bearing unit to be tested is fixedly installed on a test base through bolts and a test mandrel is arranged on the inner flange plate. An outer flange plate of the hub bearing unit is fixedly installed on a combined loading sleeve. One end of the combined loading sleeve is sequentially connected with an adjusting wire sleeve, a radial tension sensor and a radial slider. The radial slider is connected with a radial cylinder through an intermediate fixed lever. The other end of the combined loading sleeve is connected with an axial slider. The axial slider is connected with an axial cylinder through an axial tension sensor. The axial cylinder is fixed on an adjusting guide rail to realize synchronous displacement with the axial slider.

[0004] The test base of the patent fixes the hub bearing unit of the automobile through bolts. In the actual test process, the fixing bolts need to bear a large force when the hub bearing unit is subjected to an axial or radial force. Obviously, the bearing capacity of the fixing bolts is weaker than that of the hub bearing unit. When the hub bearing unit is subjected to a large force, the fixing bolts are damaged, thereby affecting the overall detection work. SUMMARY

[0005] The present application aims to solve the problem of the fixing bolts of the hub bearing unit of the automobile being easily damaged in the prior art, and provides a device for detecting torque rigidity of a hub axle pipe unit of an automobile.

[0006] To achieve the above object, the present application adopts the following technical scheme:

[0007] The utility model designs a kind of automobile wheel hub axle tube unit torque rigidity detection device, including mounting seat, the top of mounting seat is fixedly installed with support mechanism, the top of support mechanism is placed with wheel hub axle tube unit, the outer edge of wheel hub axle tube unit is installed with positioning mechanism, to fix positioning mechanism on support mechanism, the top of wheel hub axle tube unit one end is installed with axial test mechanism, to detect the axial torque rigidity value of wheel hub axle tube unit, the top of wheel hub axle tube unit other end is installed with radial test structure, to detect the radial torque rigidity value of wheel hub axle tube unit, the top of wheel hub axle tube unit is fixedly installed with differential transformer type displacement sensor, to detect the inclination of wheel hub axle tube unit.

[0008] Preferably, the support mechanism includes a support base and a plurality of fixed bolts; the fixed bolts are evenly distributed around the support base and are in threaded connection with the support base; and the support base is fixedly connected with the mounting seat by the fixed bolts.

[0009] Preferably, the support mechanism further includes a support column, a plurality of reinforcing ribs and a support top base; the support column is fixedly installed on the top of the support base; the support top base is fixedly installed on the top of the support column; and the reinforcing ribs are fixedly installed between the support column and the support top base at equal intervals around the support column.

[0010] Preferably, the axial test mechanism includes a first fixed block, a first loading rod, an axial sliding block, an axial tension sensor and an axial cylinder; the first fixed block is fixedly installed on the top of the wheel hub axle tube unit; one end of the first loading rod is fixedly connected with the first fixed block; the other end of the first loading rod is fixedly connected with the axial sliding block; the axial sliding block is fixedly connected with the axial tension sensor by a steel rope; the axial cylinder is fixedly installed on the mounting seat; and the output end of the axial cylinder is fixedly connected with the axial tension sensor by a steel rope.

[0011] Preferably, the radial test structure includes a second fixed block, a second loading rod, a radial sliding block, a radial tension sensor and a radial cylinder; the second fixed block is fixedly installed on the top of the wheel hub axle tube unit; one end of the second loading rod is fixedly connected with the second fixed block; the other end of the second loading rod is fixedly connected with the radial sliding block; the radial sliding block is fixedly connected with the radial tension sensor by a steel rope; the radial cylinder is fixedly installed on the mounting seat; and the output end of the radial cylinder is fixedly connected with the radial tension sensor by a steel rope.

[0012] Preferably, the positioning mechanism includes a mounting sleeve, a plurality of positioning cylinders and a plurality of pressing assemblies; the positioning cylinders are fixedly installed on the mounting seat and are evenly distributed around the mounting sleeve; the output ends of the positioning cylinders are fixedly connected with the mounting sleeve; and the pressing assemblies are installed on the inner side of the mounting sleeve and correspond to the positioning cylinders one by one.

[0013] Preferably, the pressing assembly comprises a threaded sleeve, a lead screw, a pressing seat, two guide rods, a connecting block and a first gear; the threaded sleeve penetrates the sidewall of the mounting sleeve and is rotationally connected with the mounting sleeve, the lead screw penetrates the threaded sleeve and is threadedly connected with the threaded sleeve, one end of the lead screw is fixedly connected with the pressing seat, the other end of the lead screw is fixedly connected with the connecting block, the two guide rods both penetrate the sidewall of the mounting sleeve and are slidingly connected with the mounting sleeve, one end of each of the two guide rods is fixedly connected with the connecting block, the other end of each of the two guide rods is fixedly connected with the pressing seat, and the first gear is fixedly installed at the end of the threaded sleeve.

[0014] Preferably, the positioning mechanism further comprises a first gear ring, a motor, a second gear and a second gear ring; the motor is fixedly installed on the mounting seat, the second gear is fixedly installed on the output shaft of the motor, the first gear ring is rotationally installed on the outside of the mounting sleeve and is in mesh with the second gear, the second gear ring is fixedly installed at the bottom of the first gear ring and is sleeved on the outside of the mounting sleeve, and the first gears are all in mesh with the second gear ring.

[0015] The application also provides a method for detecting the torque rigidity of an automobile wheel hub axle tube unit, which comprises the following steps:

[0016] Step 1: fixingly install the supporting base on the mounting seat through the fixing bolts, and then stably place the wheel hub axle tube unit on the top of the supporting top seat;

[0017] Step 2: position and fix the wheel hub axle tube unit, and the specific implementation steps are as follows:

[0018] Firstly, start the motor to make the second gear rotate, so as to make the first gear ring rotate, which makes the second gear ring drive all the first gears to rotate synchronously, and then makes all the threaded sleeves rotate synchronously, so as to make all the lead screws drive the corresponding pressing seats to move close to the wheel hub axle tube unit;

[0019] Then, all the pressing seats are attached to the inner wall of the wheel hub axle tube unit, at this time, the motor is turned off;

[0020] Finally, control the positioning air cylinder to make the mounting sleeve as a whole move downward, so as to make all the mounting sleeves move downward and press the bottom end of the wheel hub axle tube unit, and then make the wheel hub axle tube unit be fixed on the supporting top seat;

[0021] Step 3: control the axial air cylinder to make the axial sliding block move along the wheel hub axle tube unit in the axial direction, so as to make the wheel hub axle tube unit be axially deviated, and the differential transformer type displacement sensor can detect the axial deviation of the wheel hub axle tube unit; the axial tension sensor can detect the axial bearing force of the wheel hub axle tube unit;

[0022] Step 4: control the radial cylinder to make the radial slider move radially along the hub axle pipe unit, so that the hub axle pipe unit is transversely offset, and the differential transformer type displacement sensor can detect the radial offset amount of the hub axle pipe unit; the radial tension sensor can detect the radial bearing force of the hub axle pipe unit.

[0023] The automobile hub axle pipe unit torque rigidity detection device provided by the application has the beneficial effects that: the fixing mode of pressing the hub axle pipe unit by the pressing seat can greatly increase the acting area of the bottom of the hub axle pipe unit and the support top seat, so that the bottom of the hub axle pipe unit is kept stable, and then the detection work can be ensured to be normally carried out. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 The structure diagram of the automobile hub axle pipe unit torque rigidity detection device provided by the application is shown in the figure;

[0025] Fig. 2 The structure diagram of the support mechanism of the automobile hub axle pipe unit torque rigidity detection device provided by the application is shown in the figure;

[0026] Fig. 3 The structure diagram of the axial test mechanism of the automobile hub axle pipe unit torque rigidity detection device provided by the application is shown in the figure;

[0027] Fig. 4 The structure diagram of the radial test structure of the automobile hub axle pipe unit torque rigidity detection device provided by the application is shown in the figure;

[0028] Fig. 5 The structure diagram of the positioning mechanism of the automobile hub axle pipe unit torque rigidity detection device provided by the application is shown in the figure;

[0029] Fig. 6 The structure diagram of the pressing assembly of the automobile hub axle pipe unit torque rigidity detection device provided by the application is shown in the figure.

[0030] In the figure: mounting seat 1, support mechanism 2, support base 21, fixing bolt 22, support column 23, reinforcing rib 24, support top 25, wheel hub shaft tube unit 3, positioning mechanism 4, mounting sleeve 41, positioning cylinder 42, pressing assembly 43, internal thread sleeve 431, lead screw 432, pressing seat 433, guide rod 434, connecting block 435, first gear 436, first gear ring 44, motor 45, second gear 46, second gear ring 47, axial test mechanism 5, first fixing block 51, first loading rod 52, axial sliding block 53, axial tension sensor 54, axial cylinder 55, radial test structure 6, second fixing block 61, second loading rod 62, radial sliding block 63, radial tension sensor 64, radial cylinder 65, differential transformer displacement sensor 7. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0032] Embodiment 1:

[0033] Reference Figs. 1-4 A torque rigidity detection device for automobile wheel hub shaft tube unit, comprising a mounting seat 1, a support mechanism 2 is fixedly installed on the top of the mounting seat 1, a wheel hub shaft tube unit 3 is placed on the top end of the support mechanism 2, a positioning mechanism 4 is installed on the outer edge of the wheel hub shaft tube unit 3 to fix the positioning mechanism 4 on the support mechanism 2, an axial test mechanism 5 is installed on one end of the top of the wheel hub shaft tube unit 3 to detect the axial torque rigidity value of the wheel hub shaft tube unit 3, a radial test structure 6 is installed on the other end of the top of the wheel hub shaft tube unit 3 to detect the radial torque rigidity value of the wheel hub shaft tube unit 3, and a differential transformer displacement sensor 7 is fixedly installed on the top of the wheel hub shaft tube unit 3 to detect the inclination of the wheel hub shaft tube unit 3.

[0034] The support mechanism 2 comprises a support base 21, a plurality of fixing bolts 22, a support column 23, a plurality of reinforcing ribs 24 and a support top 25; the plurality of fixing bolts 22 are evenly distributed around the support base 21 and are all in threaded connection with the support base 21, and the support base 21 is fixedly connected with the mounting seat 1 through the fixing bolts 22; the support column 23 is fixedly installed on the top of the support base 21, the support top 25 is fixedly installed on the top of the support column 23, and the plurality of reinforcing ribs 24 are equidistantly distributed around the support column 23 and are all fixedly installed between the support column 23 and the support top 25.

[0035] The axial test mechanism 5 comprises a first fixed block 51, a first loading rod 52, an axial sliding block 53, an axial tension sensor 54 and an axial cylinder 55; the first fixed block 51 is fixedly installed on the top of the hub shaft tube unit 3, one end of the first loading rod 52 is fixedly connected with the first fixed block 51, the other end of the first loading rod 52 is fixedly connected with the axial sliding block 53, the axial sliding block 53 is fixedly connected with the axial tension sensor 54 through a steel wire, the axial cylinder 55 is fixedly installed on the mounting seat 1, and the output end of the axial cylinder 55 is fixedly connected with the axial tension sensor 54 through a steel wire; the axial sliding block 53 is controlled to move along the hub shaft tube unit 3 in the axial direction by controlling the axial cylinder 55, so that the hub shaft tube unit 3 is axially offset, and the differential transformer type displacement sensor 7 can detect the axial offset amount of the hub shaft tube unit 3; the axial tension sensor 54 can detect the axial bearing force of the hub shaft tube unit 3.

[0036] The radial test structure 6 comprises a second fixed block 61, a second loading rod 62, a radial sliding block 63, a radial tension sensor 64 and a radial cylinder 65; the second fixed block 61 is fixedly installed on the top of the hub shaft tube unit 3, one end of the second loading rod 62 is fixedly connected with the second fixed block 61, the other end of the second loading rod 62 is fixedly connected with the radial sliding block 63, the radial sliding block 63 is fixedly connected with the radial tension sensor 64 through a steel wire, the radial cylinder 65 is fixedly installed on the mounting seat 1, and the output end of the radial cylinder 65 is fixedly connected with the radial tension sensor 64 through a steel wire; the radial sliding block 63 is controlled to move along the hub shaft tube unit 3 in the radial direction by controlling the radial cylinder 65, so that the hub shaft tube unit 3 is radially offset, and the differential transformer type displacement sensor 7 can detect the radial offset amount of the hub shaft tube unit 3; the radial tension sensor 64 can detect the radial bearing force of the hub shaft tube unit 3.

[0037] Working principle: first, the supporting base 21 is fixedly installed on the mounting seat 1 through the fixing bolt 22, and then the hub shaft tube unit 3 is stably placed on the top of the supporting top seat 25;

[0038] Then the axial sliding block 53 is controlled to move along the hub shaft tube unit 3 in the axial direction by controlling the axial cylinder 55, so that the hub shaft tube unit 3 is axially offset, and the differential transformer type displacement sensor 7 can detect the axial offset amount of the hub shaft tube unit 3; the axial tension sensor 54 can detect the axial bearing force of the hub shaft tube unit 3;

[0039] The radial cylinder 65 is controlled again so that the radial slider 63 moves along the hub shaft pipe unit 3 in the radial direction, so that the hub shaft pipe unit 3 is offset in the radial direction, and the differential transformer displacement sensor 7 can detect the radial offset amount of the hub shaft pipe unit 3; the radial tension sensor 64 can detect the radial bearing force of the hub shaft pipe unit 3. The whole detection process well simulates the stress effect of the hub shaft pipe unit 3, and the test result is more real; the structure is simple, convenient to install and stable to load.

[0040] Embodiment 2:

[0041] With reference to Figs. 1-6 As another preferred embodiment of the present application, the difference from embodiment 1 is that the positioning mechanism 4 comprises a mounting sleeve 41, a plurality of positioning cylinders 42 and a plurality of pressing assemblies 43; the plurality of positioning cylinders 42 are fixedly installed on the mounting seat 1 and are equidistantly distributed around the mounting sleeve 41, the output ends of the plurality of positioning cylinders 42 are fixedly connected with the mounting sleeve 41, and the plurality of pressing assemblies 43 are installed on the inner side of the mounting sleeve 41 and correspond one-to-one with the positioning cylinders 42;

[0042] The pressing assembly 43 comprises an internal thread sleeve 431, a lead screw 432, a pressing seat 433, two guide rods 434, a connecting block 435 and a first gear 436; the internal thread sleeve 431 penetrates through the side wall of the mounting sleeve 41 and is rotatably connected with the mounting sleeve 41, the lead screw 432 penetrates through the internal thread sleeve 431 and is threadedly connected with the internal thread sleeve 431, one end of the lead screw 432 is fixedly connected with the pressing seat 433, the other end of the lead screw 432 is fixedly connected with the connecting block 435, the two guide rods 434 penetrate through the side wall of the mounting sleeve 41 and are slidably connected with the mounting sleeve 41, one end of each of the two guide rods 434 is fixedly connected with the connecting block 435, and the other end of each of the two guide rods 434 is fixedly connected with the pressing seat 433, and the first gear 436 is fixedly installed at the end of the internal thread sleeve 431.

[0043] The positioning mechanism 4 further comprises a first gear ring 44, a motor 45, a second gear 46 and a second gear ring 47; the motor 45 is fixedly installed on the mounting seat 1, the second gear 46 is fixedly installed on the output shaft of the motor 45, the first gear ring 44 is rotatably installed on the outer side of the mounting sleeve 41 and is engaged with the second gear 46, the second gear ring 47 is fixedly installed at the bottom of the first gear ring 44 and is sleeved on the outer side of the mounting sleeve 41, and each of the plurality of first gears 436 is engaged with the second gear ring 47.

[0044] Working principle: first, the supporting base 21 is fixedly installed on the mounting seat 1 through the fixing bolts 22, and then the hub shaft pipe unit 3 is stably placed on the top of the supporting top seat 25;

[0045] Then the motor 45 makes the second gear 46 rotate, so that the first gear ring 44 rotates, which makes the second gear ring 47 drive all the first gears 436 to rotate synchronously, and then all the inner threaded sleeves 431 rotate synchronously, so that all the lead screws 432 drive the corresponding pressing seats 433 to move close to the hub shaft pipe unit 3; all the pressing seats 433 are attached to the inner wall of the hub shaft pipe unit 3, at this time the motor 45 is turned off;

[0046] The positioning cylinder 42 is controlled to make the mounting sleeve 41 move downward as a whole, so that all the mounting sleeves 41 move downward and press the bottom end of the hub shaft pipe unit 3, and then the hub shaft pipe unit 3 is fixed on the support top seat 25; this fixing mode can greatly increase the acting area of the bottom of the hub shaft pipe unit 3 and the support top seat 25, so that the bottom of the hub shaft pipe unit 3 is kept stable, and then the detection work can be ensured to be carried out normally.

[0047] The axial cylinder 55 is controlled to make the axial sliding block 53 move along the hub shaft pipe unit 3 in the axial direction, so that the hub shaft pipe unit 3 is axially offset, and the differential transformer type displacement sensor 7 can detect the axial offset amount of the hub shaft pipe unit 3; the axial tension sensor 54 can detect the axial bearing force of the hub shaft pipe unit 3.

[0048] Then the radial cylinder 65 is controlled to make the radial sliding block 63 move along the hub shaft pipe unit 3 in the radial direction, so that the hub shaft pipe unit 3 is radially offset, and the differential transformer type displacement sensor 7 can detect the radial offset amount of the hub shaft pipe unit 3; the radial tension sensor 64 can detect the radial bearing force of the hub shaft pipe unit 3. The whole detection process well simulates the stress effect of the hub shaft pipe unit 3, and the test result is more real; the structure is simple, the installation is convenient, and the loading is stable.

[0049] The application also provides a torque rigidity detection method for a hub shaft pipe unit of an automobile, which comprises the following steps:

[0050] Step 1: The support base 21 is fixedly installed on the mounting seat 1 through the fixing bolts 22, and then the hub shaft pipe unit 3 is stably placed on the top of the support top seat 25;

[0051] Step 2: The hub shaft pipe unit 3 is positioned and fixed, and the specific implementation steps are as follows:

[0052] Firstly, the motor 45 is started to make the second gear 46 rotate, so that the first gear ring 44 rotates, which makes the second gear ring 47 drive all the first gears 436 to rotate synchronously, and then all the inner threaded sleeves 431 rotate synchronously, so that all the lead screws 432 drive the corresponding pressing seats 433 to move close to the hub shaft pipe unit 3;

[0053] Then, all the pressing seats 433 are in close contact with the inner wall of the hub shaft pipe unit 3, at which time the motor 45 is turned off;

[0054] Finally, the positioning cylinder 42 is controlled to move the mounting sleeve 41 downward as a whole, so that all the mounting sleeves 41 move downward and press the bottom end of the hub shaft pipe unit 3, thereby fixing the hub shaft pipe unit 3 on the support top seat 25;

[0055] Step 3: The axial cylinder 55 is controlled to move the axial slider 53 along the hub shaft pipe unit 3 in the axial direction, so that the hub shaft pipe unit 3 is axially offset, and the differential transformer displacement sensor 7 can detect the amount of axial offset of the hub shaft pipe unit 3; the axial tension sensor 54 can detect the axial bearing force of the hub shaft pipe unit 3;

[0056] Step 4: The radial cylinder 65 is controlled to move the radial slider 63 along the hub shaft pipe unit 3 in the radial direction, so that the hub shaft pipe unit 3 is radially offset, and the differential transformer displacement sensor 7 can detect the amount of radial offset of the hub shaft pipe unit 3; the radial tension sensor 64 can detect the radial bearing force of the hub shaft pipe unit 3.

[0057] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A device for detecting the torque rigidity of a unit of an automobile wheel hub axle tube, comprising a mounting seat (1), characterized in that, The top of the mounting seat (1) is fixedly provided with a supporting mechanism (2), the top end of the supporting mechanism (2) is provided with a hub shaft tube unit (3), the outer edge of the hub shaft tube unit (3) is provided with a positioning mechanism (4) for fixing the positioning mechanism (4) on the supporting mechanism (2), one end of the top of the hub shaft tube unit (3) is provided with an axial test mechanism (5) for detecting the axial torque rigidity value of the hub shaft tube unit (3), the other end of the top of the hub shaft tube unit (3) is provided with a radial test structure (6) for detecting the radial torque rigidity value of the hub shaft tube unit (3), the top of the hub shaft tube unit (3) is fixedly provided with a differential transformer displacement sensor (7) for detecting the inclination of the hub shaft tube unit (3); The supporting mechanism (2) comprises a supporting base (21), a plurality of fixed bolts (22), a supporting column (23), a plurality of reinforcing ribs (24) and a supporting top seat (25); The positioning mechanism (4) comprises a mounting sleeve (41), a plurality of positioning cylinders (42) and a plurality of pressing assemblies (43); the plurality of positioning cylinders (42) are fixedly installed on the mounting seat (1) and are equidistantly distributed around the mounting sleeve (41), the output ends of the plurality of positioning cylinders (42) are fixedly connected with the mounting sleeve (41), and the plurality of pressing assemblies (43) are installed on the inner side of the mounting sleeve (41) and correspond to the positioning cylinders (42) in one-to-one correspondence. The pressing assembly (43) comprises an internal thread sleeve (431), a lead screw (432), a pressing seat (433), two guide rods (434), a connecting block (435) and a first gear (436); the internal thread sleeve (431) penetrates through the side wall of the mounting sleeve (41) and is rotatably connected with the mounting sleeve (41), the lead screw (432) penetrates through the internal thread sleeve (431) and is threadedly connected with the internal thread sleeve (431), one end of the lead screw (432) is fixedly connected with the pressing seat (433), the other end of the lead screw (432) is fixedly connected with the connecting block (435), the two guide rods (434) penetrate through the side wall of the mounting sleeve (41) and are slidably connected with the mounting sleeve (41), one end of each of the two guide rods (434) is fixedly connected with the connecting block (435), and the other end of each of the two guide rods (434) is fixedly connected with the pressing seat (433), and the first gear (436) is fixedly installed at the end of the internal thread sleeve (431). The positioning mechanism (4) further comprises a first gear ring (44), a motor (45), a second gear (46) and a second gear ring (47); the motor (45) is fixedly installed on the mounting seat (1), the second gear (46) is fixedly installed on the output shaft of the motor (45), the first gear ring (44) is rotatably installed on the outer side of the mounting sleeve (41) and is engaged with the second gear (46), the second gear ring (47) is fixedly installed at the bottom of the first gear ring (44) and is sleeved on the outer side of the mounting sleeve (41), and the plurality of first gears (436) are engaged with the second gear ring (47).

2. The automobile hub carrier unit torque rigidity detection device according to claim 1, characterized by A plurality of the fixing bolts (22) are evenly distributed around the support base (21) and are in threaded connection with the support base (21), and the support base (21) is fixedly connected with the mounting seat (1) through the fixing bolts (22).

3. The automobile hub carrier unit torque rigidity detection device according to claim 1, characterized by The support column (23) is fixedly installed at the top of the support base (21), the support top (25) is fixedly installed at the top of the support column (23), and a plurality of the reinforcing ribs (24) are equally distributed around the support column (23) and are fixedly installed between the support column (23) and the support top (25).

4. The automobile hub pipe unit torque stiffness detection device according to claim 3, characterized by The axial test mechanism (5) comprises a first fixing block (51), a first loading rod (52), an axial sliding block (53), an axial tension sensor (54) and an axial cylinder (55); the first fixing block (51) is fixedly installed at the top of the hub shaft tube unit (3), one end of the first loading rod (52) is fixedly connected with the first fixing block (51), the other end of the first loading rod (52) is fixedly connected with the axial sliding block (53), the axial sliding block (53) is fixedly connected with the axial tension sensor (54) through a steel wire, and the output end of the axial cylinder (55) is fixedly connected with the axial tension sensor (54) through a steel wire.

5. The automobile hub pipe unit torque stiffness detection device according to claim 4, characterized by The radial test mechanism (6) comprises a second fixing block (61), a second loading rod (62), a radial sliding block (63), a radial tension sensor (64) and a radial cylinder (65); the second fixing block (61) is fixedly installed at the top of the hub shaft tube unit (3), one end of the second loading rod (62) is fixedly connected with the second fixing block (61), the other end of the second loading rod (62) is fixedly connected with the radial sliding block (63), the radial sliding block (63) is fixedly connected with the radial tension sensor (64) through a steel wire, and the output end of the radial cylinder (65) is fixedly connected with the radial tension sensor (64) through a steel wire.

6. A method of detecting the torque rigidity of an automobile hub axle tube unit according to claim 5, characterized by, The method comprises the following steps: Step 1: fixingly installing the support base (21) on the mounting seat (1) through the fixing bolts (22), and then stably placing the hub shaft tube unit (3) on the top of the support top (25); Step 2: positioning and fixing the hub shaft tube unit (3), and the specific implementation steps are as follows: Firstly, starting the motor (45) to make the second gear (46) rotate, so as to make the first gear ring (44) rotate, which makes the second gear ring (47) drive all the first gears (436) to rotate synchronously, and then makes all the internal threaded sleeves (431) rotate synchronously, so that all the lead screws (432) drive the corresponding pressing seats (433) to move close to the hub shaft tube unit (3); Then, all the pressing seats (433) are attached to the inner wall of the hub shaft tube unit (3), and at this time the motor (45) is turned off; Finally, the positioning cylinder (42) is controlled to move the mounting sleeve (41) downward as a whole, so that all the mounting sleeves (41) move downward and press the bottom end of the hub shaft tube unit (3), thereby fixing the hub shaft tube unit (3) on the support top seat (25); Step 3: The axial cylinder (55) is controlled to move the axial slider (53) along the hub shaft tube unit (3) in the axial direction, so that the hub shaft tube unit (3) is axially offset, and the differential transformer displacement sensor (7) can detect the axial offset amount of the hub shaft tube unit (3); the axial tension sensor (54) can detect the axial bearing force of the hub shaft tube unit (3); Step 4: The radial cylinder (65) is controlled to move the radial slider (63) along the hub shaft tube unit (3) in the radial direction, so that the hub shaft tube unit (3) is radially offset, and the differential transformer displacement sensor (7) can detect the radial offset amount of the hub shaft tube unit (3); the radial tension sensor (64) can detect the radial bearing force of the hub shaft tube unit (3).

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