CN216433521U - Transfer case no-load test transmission connecting device - Google Patents

Abstract

The utility model relates to a transfer case no-load test transmission connecting device, transmission connecting device includes the universal joint, and the one end and the transfer case of universal joint rotate to be connected, and the other end and the motor shaft of universal joint rotate to be connected. The bearing is arranged at one end, connected with the transfer case, of the universal joint, and the position deviation of the connecting end of the universal joint and the transfer case is limited by the bearing. Therefore, the vibration amplitude in the running process is controlled, the noise is reduced, and the safety in the high-speed test is ensured so as to meet the requirement of the no-load test.

Description

Transfer case no-load test transmission connecting device

Technical Field

The utility model relates to an automobile manufacturing technical field, concretely relates to transfer case no-load test transmission connecting device.

Background

When testing the transfer case, a universal joint is usually adopted to rotationally connect the motor and the transfer case. Because some transfer cases are fixed by bolt holes arranged on the side surface, the deviation between the center position of a power input end and the position of a mounting hole is overlarge and exceeds +/-0.5 mm, under the condition that the center has deviation, when the input rotating speed reaches more than 3000rpm, the noise generated in the operation process is overhigh, the no-load test and detection of the transfer case are influenced, even the rotating connecting part flies out, and the accidents of personal injury or equipment damage are caused. Therefore, in the prior art, the universal joint is adopted to realize the rotary connection of the motor and the transfer case, only low-speed tests can be carried out, and the no-load test requirement of high-speed operation cannot be met.

Through patent retrieval, with the utility model discloses there is following patent mainly to have the patent of certain relation:

1. the invention relates to a Chinese invention patent with the application number of '201310047951. X', the application date of '2013.02.06', the publication number of 'CN 103134678B', the publication date of '2016.02.10', the name of 'a vehicle comprehensive transmission system test bench and test system' and the applicant of 'Henan university of technology', and relates to a vehicle comprehensive transmission system test bench and test system. In the whole transmission system, two paths of hydraulic power and two paths of mechanical power are provided for a hydraulic mechanical stepless speed changer and a mechanical hydraulic double-flow transmission steering device by using only one transfer case, and related power equipment is greatly saved, so that the structure of the rack is greatly simplified, and the design difficulty is reduced. However, the invention does not relate to the specific structure of the transmission connecting device, and also does not relate to the vibration problem caused by high-speed rotation during the no-load test of the transfer case.

2. The invention discloses a loading detection test bed for a four-wheel drive automobile transfer case, which is a Chinese invention patent with the application number of 201511023557.8, the application date of 2015.12.29, the publication number of CN105547693B and the publication date of 2018.01.02, named as a four-wheel drive automobile transfer case loading detection test bed and the application name of Anhui agriculture university. The system adopts a direct current loading motor and a four-quadrant working Siemens rectification and inversion technology to provide certain reverse torque power, simulate loads under comprehensive conditions of different road conditions, vehicle weight, wind resistance and the like, recycle energy consumption in the test process back to a power supply network and realize electric closed loading; an output shaft torque sensor is respectively arranged between the front and rear output shafts of the transfer case and the direct current loading motor and used for measuring the rotating speed and the torque of the front and rear output shafts of the transfer case; the electric transmission device is used for installing a variable frequency speed regulation device, a rectification inversion device, a control electric appliance and the like of an alternating current and direct current motor for driving input and output, and the computer measurement and control system has the main functions of collecting experimental data, automatically controlling the experimental process, analyzing and processing the experimental data, forming and printing reports, and analyzing and judging the qualification of a tested piece. However, the invention does not relate to the specific structure of the transmission connecting device, and also does not relate to the vibration problem caused by high-speed rotation during the no-load test of the transfer case.

3. The utility model discloses a utility model patent that application number is "201220020232. X", application date is "2012.01.17", the publication number is "CN 202471415U", the publication date is "2012.10.03", the name is "car transfer case quadruplex position unloaded automatic test system", the applicant is "ten weichenpeng electromechanical technology limited company", this utility model patent relates to a car transfer case quadruplex position unloaded automatic test system, including hoist and mount machinery, quadruplex position test platform includes a rotary platform, rotary platform is equipped with four stations of ninety degrees apart in proper order, transports the transfer case assembly to through hoist and mount machinery rotary platform. The utility model discloses 4 stations of global design are fit for the batch production rhythm, always prepare and test time control beat within 5 minutes. However, the utility model does not relate to the specific structure of the transmission connecting device, and also does not relate to the vibration problem caused by high-speed rotation during the no-load test of the transfer case.

4. The utility model discloses a utility model patent that application number is "201420045723.9", application date is "2014.01.24", publication number is "CN 203719915U", publication date is "2014.07.16", the name is "well bridge transfer case assembly fatigue life rack test device", the applicant is "the first car shares limited company in china", this utility model patent relates to a well bridge transfer case assembly fatigue life rack test device, its characterized in that: driving motor passes through the transmission shaft and is connected with well bridge transfer case assembly input, well bridge transfer case assembly angular adjustment device and the special fixing device fixed connection of well bridge transfer case assembly back are connected with well bridge transfer case assembly both sides, well bridge transfer case assembly passes through the special fixing device fixed connection of well bridge transfer case assembly on the mount, well bridge transfer case assembly left side output passes through the transmission shaft and is connected with transfer case left side loading motor, the special fixing device of test bridge is accompanied after to back both sides of accompanying the test bridge, the special fixing device fixed connection of test bridge is accompanied after through to the back of accompanying the test bridge on the mount, the front axle output of well bridge transfer case assembly passes through the transmission shaft and is connected with preceding test bridge of accompanying, preceding test bridge both sides of accompanying the test bridge have preceding special fixing device of test bridge of accompanying the test bridge, preceding test bridge of accompanying the test bridge is through preceding special fixing device fixed connection of test bridge of accompanying the test bridge on the mount. The fatigue life test of the middle axle transfer case assembly rack can be carried out, and the service life of the product is really checked in the shortest time. However, the utility model does not relate to the specific structure of the transmission connecting device, and also does not relate to the vibration problem caused by high-speed rotation during the no-load test of the transfer case.

5. The utility model discloses a utility model patent with the application number of '201720171264.2', the application date of '2017.02.24', the publication number of 'CN 206515057U', the publication date of '2017.09.22', the name of 'transfer case test bench of paver', the applicant is the 'engineering machinery of xu Gong Ji Ltd', the utility model discloses a transfer case test bench of paver, including motor, shaft coupling, be used for connecting the coupling support, the base of transfer case and be used for connecting the reducing flange of transfer case; the connecting support is arranged on the left side of the base, and a hole for placing the transfer case is formed in the connecting support; the motor is arranged on the right side of the base and is connected with the reducing flange through the coupler. One end of the transfer case of the utility model is connected with the test bed connecting support, and the bottom of the transfer case is supported by an adjustable support; the other end of the transfer case of the spreading machine is connected with the reducing flange and is connected with the motor through the coupler. The motor operates to drive the transfer case to rotate, so that whether the transfer case of the spreading machine leaks oil or not can be detected, and the assembly quality of the transfer case of the spreading machine is effectively controlled. However, the utility model does not relate to the specific structure of the transmission connecting device, and also does not relate to the vibration problem caused by high-speed rotation during the no-load test of the transfer case.

6. The utility model discloses a test platform and mounting bracket are included to utility model patent that application number is "201920867136.0", application date is "2019.06.10", publication number is "CN 209878321U", publication date is "2019.12.31", the name is "transfer case testing arrangement", the applicant is "no tin city langdi measurement and control technology limited company", set up input accredited testing organization and output accredited testing organization on the test platform side by side; the testing platform is characterized in that a mounting frame is connected to one side of the testing platform, a transfer case used for testing is arranged on the mounting frame, the input end of the transfer case is connected with the input end testing mechanism, and the output end of the transfer case is connected with the output end testing mechanism. However, the utility model does not relate to the specific structure of the transmission connecting device, and also does not relate to the vibration problem caused by high-speed rotation during the no-load test of the transfer case.

7. The utility model discloses a practical utility model patent with application number "201920451845.0", application date "2019.04.04", publication number "CN 210198715U", publication number "2020.03.27", name "a transfer case unloaded offline test platform", applicant for "the neutral slightly equips no-tin limited company", the utility model discloses a transfer case unloaded offline test platform, including supporting base, the top of supporting base rotates installs the first threaded rod that the level set up, two threaded sleeves are installed to the outside screw thread of first threaded rod, threaded sleeve and the top sliding connection of supporting base, threaded sleeve's top rotates installs the bracing piece, two the elevating platform that the level set up is installed to the top of bracing piece rotation, the top sliding mounting of elevating platform has the sliding plate, the top fixed mounting of sliding plate has driving motor, the top fixed mounting of elevating platform has first fixed plate, a second threaded rod which is horizontally arranged is installed on the first fixing plate in a threaded mode, and one end of the second threaded rod is rotatably connected with the sliding plate. However, the utility model does not relate to the concrete structure of transmission connecting device, nor relates to the vibration problem caused by high-speed rotation when the transfer case is in no-load test.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to the vibration problem that causes when transfer case no-load test because of high-speed rotation, provide a transfer case no-load test transmission connecting device.

In order to solve the technical problem, the utility model discloses the technical scheme who takes does: a transfer case no-load test drive connection, the transfer case no-load test comprising: the transfer case is fixed on the mounting frame, and the motor is rotationally connected with the transfer case through the transmission connecting device; the transmission connecting device comprises a universal joint, one end of the universal joint is rotatably connected with the transfer case, and the other end of the universal joint is rotatably connected with the motor rotating shaft. One end of the universal joint connected with the transfer case is arranged in an inner ring of the bearing, and the position deviation of the connection end of the universal joint and the transfer case is limited through the bearing. Therefore, the vibration amplitude in the running process is controlled, the noise is reduced, and the safety in the high-speed test is ensured so as to meet the requirement of the no-load test.

Furthermore, the bearing adopts a radial ball bearing, and the angular deviation between the universal joint and the connecting end of the transfer case and the input shaft of the transfer case is further eliminated by utilizing the aligning performance of the radial ball bearing, so that the noise is further reduced.

Furthermore, the outer ring of the bearing is fixed in a center hole of the vertical adjusting block, and the height deviation between the universal joint and the connecting end of the transfer case and the rotating shaft of the transfer case is adjusted by adjusting the vertical height of the vertical adjusting block.

Further, vertical regulating block sets up in the horizontal regulating block, through the position of adjustment horizontal regulating block in the connecting seat horizontal direction, adjusts the horizontal position deviation between universal joint and transfer case link and the transfer case pivot.

Furthermore, a connecting sleeve, a driving plate and a rotating disc are arranged at the connecting end of the universal joint and the transfer case, and the connecting sleeve is sleeved in the inner ring of the bearing; one end of the connecting sleeve is connected with the driving plate in a rotating fit manner, and the other end of the connecting sleeve is detachably connected with the universal joint; one end of the drive plate is connected with the connecting sleeve in a rotating fit manner, and the other end of the drive plate is connected with the rotating disc in a rotating fit manner; the turntable is detachably connected with an input shaft of the transfer case. And the driving plate is used for realizing the transmission connection between the universal joint and the transfer case.

Further, the connecting sleeve is cylindrical, and an inner spline is arranged in an inner hole of the connecting sleeve.

Furthermore, the drive plate comprises a drive plate body, one side of the drive plate body is provided with an external spline along the axial direction, and the other side of the drive plate body is provided with drive teeth; the external splines are inserted into the internal splines and slide along the internal splines, so that the drive plate slides along the axial direction of the connecting sleeve. And the quick transmission connection between the universal joint and the transfer case is realized by the axial sliding of the driving plate.

Furthermore, the number of the shifting teeth is not less than two, the shifting teeth are uniformly distributed on one side of the shifting plate body, and the top end of the shifting teeth is conical. The plurality of uniformly distributed shifting teeth can eliminate eccentric moment generated by a single shifting tooth, and the conical shifting teeth can be smoothly inserted into the rotary disc shifting holes of the rotary disc.

Furthermore, a spring assembly is arranged in an inner hole of the connecting sleeve, the spring assembly adopts a compression spring, one end of the spring assembly is in contact with the universal joint, the other end of the spring assembly is in contact with the driving plate, and the driving plate slides towards the direction of the rotary disc by utilizing the spring assembly. The drive plate is always pressed on the rotary plate, and reliable rotary connection is realized.

Furthermore, the turntable is disc-shaped, a turntable shifting hole and a turntable screw hole are formed in the turntable, the turntable is mounted on the input shaft of the transfer case through the turntable screw hole, and the turntable shifting hole is matched with the shifting teeth to achieve rotary connection with the shifting plate.

The utility model has the advantages that: the bearing is arranged at one end, connected with the transfer case, of the universal joint, and the position deviation of the connecting end of the universal joint and the transfer case is limited by the bearing. Therefore, the vibration amplitude in the running process is controlled, the noise is reduced, and the safety in the high-speed test is ensured so as to meet the requirement of the no-load test.

Drawings

Figure 1 is a schematic diagram of a transfer case no-load test,

figure 2 is a schematic view of a drive connection,

FIG. 3 is a schematic sectional view taken from A-A in FIG. 2,

figure 4 is an exploded view of the drive connection of figure 2,

figure 5 is an exploded perspective view of the drive connection,

FIG. 6 is a schematic perspective view of a connecting seat,

figure 7 is a schematic perspective view of the horizontal adjusting block,

FIG. 8 is a perspective view of a vertical adjustment block,

figure 9 is a schematic view of the stereo structure of the connecting sleeve,

figure 10 is a schematic perspective view of the lock nut,

figure 11 is a schematic perspective view of the dial,

figure 12 is a schematic perspective view of the turntable,

in the figure: 1, a motor; 2-transmission connecting device, 21-connecting seat, 211-connecting seat center hole, 212-connecting seat flange, 22-universal joint, 23-horizontal adjusting block, 231-horizontal adjusting block center hole, 232-horizontal adjusting block flange, 233-horizontal adjusting spring hole, 234-horizontal adjusting spring, 24-vertical adjusting block, 241-vertical adjusting block center hole, 242-vertical adjusting spring hole, 25-bearing, 26-locking nut, 27-spring component, 28-connecting sleeve, 281-internal spline, 29-dial plate, 291-external spline, 292-dial plate body, 293-dial tooth, 30-dial plate, 301-dial plate hole, 302-dial plate screw hole; 3-transfer case; 4, mounting frame.

Detailed Description

The invention will be further described by means of specific embodiments and with reference to the accompanying drawings:

as shown in fig. 1, the transfer case no-load test includes: motor 1, transmission connecting device 2, transfer case 3 and mounting bracket 4, transfer case 3 are fixed on mounting bracket 4, and motor 1 rotates with transfer case 3 through transmission connecting device 2 to be connected, and motor 1 drives transfer case 3 through transmission connecting device 2 and rotates, carries out transfer case no-load test.

Because some transfer cases 3 adopt the bolt hole that sets up in the side to fix, lead to power input end central point to put the dish deviation too big with the mounting hole position, probably exceed more than 0.5 mm. Therefore, in the prior art, a universal joint is adopted to rotatably connect the motor and the transfer case. In the case of a deviation in the center, a large noise is generated in the rotation. When the input rotating speed reaches more than 3000rpm, the no-load test and detection of the transfer case can be influenced, even the rotating connecting part flies out, and the accidents of personal casualties or equipment damage are caused. Therefore, the existing universal joint is adopted to realize the rotary connection of the motor and the transfer case, only low-speed tests can be carried out, and the no-load test requirement of high-speed operation cannot be met.

As shown in fig. 2 to 5, the drive connection device 2 includes: the device comprises a connecting seat 21, a universal joint 22, a horizontal adjusting block 23, a vertical adjusting block 24, a bearing 25, a locking nut 26, a spring assembly 27, a connecting sleeve 28, a dial 29 and a turntable 30.

As shown in fig. 6, the connecting base 21 is a rectangular box, one end of the connecting base 21 is provided with a connecting base center hole 211 and a connecting base flange 212, the universal joint 22 is disposed in the connecting base 21, and one end of the universal joint 22 penetrates out of the connecting base center hole 211.

As shown in fig. 7, the horizontal adjustment block 23 includes: a center hole 231 of the horizontal adjusting block and a rib 232 of the horizontal adjusting block. Horizontal adjusting spring holes 233 for placing horizontal adjusting springs 234 are provided at both ends of the horizontal adjusting block rib 232.

As shown in FIG. 8, the vertical adjustment block 24 includes a vertical adjustment block center hole 241 and a vertical adjustment spring hole 242 disposed at a side thereof for mounting a vertical adjustment spring.

As shown in fig. 9, the connecting sleeve 28 is cylindrical, one end of the connecting sleeve 28 is provided with an annular rib, the outer peripheral surface of the connecting sleeve 28 is provided with an external thread which is matched with the locking nut 26, and an inner bore of the connecting sleeve 28 is provided with an inner spline 281.

As shown in fig. 10, the lock nut 26 is provided with an internal thread in a central hole thereof to be engaged with the coupling sleeve 28, and the lock nut 26 is provided with a rotation groove.

As shown in fig. 11, the dial 29 includes: the dial body 292, one side of the dial body 292 is provided with an external spline 291 along the axial direction, the external spline 291 is inserted into the internal spline 281 and slides along the internal spline 281, so that the dial 29 can slide along the axial direction of the connecting sleeve 28. The other side of dial plate 292 is provided with a plurality of equipartition and dials tooth 293, dials tooth 293 top and is conical.

As shown in fig. 12, the turntable 30 is disc-shaped, the turntable 30 is provided with a turntable dial hole 301 and a turntable screw hole 302, the turntable 30 is mounted on the input shaft of the transfer case 3 through the turntable screw hole 302, and the turntable dial hole 301 is engaged with the dial 293 to realize rotational connection with the dial 29.

As shown in fig. 2 to 3, the universal joint 22 is disposed in the connecting base 21, and one end of the universal joint 22 penetrates through the central hole 211 of the connecting base and is connected to one end of the connecting sleeve 28.

The horizontal adjusting block 23 is installed between two connecting seat ribs 212 at one end of the connecting seat 21 by bolts, and a horizontal adjusting spring 234 is inserted into the horizontal adjusting spring hole 233. The horizontal adjusting block 23 can horizontally move between the two connecting seat flanges 212 and is used for adjusting the horizontal position deviation between the connecting end of the universal joint 22 and the transfer case 3 and the rotating shaft of the transfer case 3. After the horizontal position is adjusted, the horizontal adjusting block 23 is locked at one end of the connecting seat 21 by using a bolt.

The vertical adjusting block 24 is arranged between the two horizontal adjusting block flanges 232 in the horizontal adjusting block 23, can vertically move between the two horizontal adjusting block flanges 232, and is used for adjusting the vertical position deviation between the connecting end of the universal joint 22 and the transfer case 3 and the rotating shaft of the transfer case 3. After the vertical position is adjusted, the vertical adjusting block 24 is locked on the horizontal adjusting block 23 by bolts.

The outer race of bearing 25 fits within vertical adjustment block central bore 241 of vertical adjustment block 24.

One end of the connecting sleeve 28 is connected with the universal joint 22, and the other end passes through the inner ring of the bearing 25, and then the bearing 25 is locked on the connecting sleeve 28 by the lock nut 26. A spring assembly 27 is arranged in an inner hole of the connecting sleeve 28, the spring assembly 27 adopts a compression spring, one end of the spring assembly 27 is contacted with the universal joint 22, and the other end is contacted with the dial 29.

The outer spline 291 of the dial 29 is inserted into the inner spline 281 of the joint sleeve 28 and can slide in the axial direction of the joint sleeve 28. Under the action of the spring assembly 27, the dial plate 29 slides towards the rotary plate 30, so that the shifting teeth 293 are inserted into the rotary plate shifting holes 301 on the rotary plate 30, and the rotary plate 30 is driven to rotate, and the transfer case 3 is driven to perform a no-load test.

The no-load test of the transfer case 3 comprises the following steps:

s1: mounting the transfer case 3 on the mounting frame 4, and mounting the turntable 30 on the input shaft of the transfer case 3;

s2: the horizontal direction position deviation between the universal joint 22 and the connection end of the transfer case 3 and the rotating shaft of the transfer case 3 is adjusted by adjusting the horizontal adjusting block 23, and the position of the horizontal adjusting block 23 is locked;

s3: the vertical position deviation between the connection end of the universal joint 22 and the transfer case 3 and the rotating shaft of the transfer case 3 is adjusted by adjusting the vertical adjusting block 24, and the position of the vertical adjusting block 24 is locked;

s4: by moving the mounting frame 4, the transfer case 3 is moved towards the transmission connecting device 2, the shifting teeth 293 are inserted into the turntable shifting holes 301, and the motor 1 is rotatably connected with the transfer case 3;

s5: starting the motor 1, controlling the rotating speed of the motor 1, and carrying out a no-load test on the transfer case 3;

s6: and recording the model, the number and the test data of the transfer case 3.

When proceeding to step S5, the following requirements should be satisfied:

1. the input rotating speed is adjusted to 1500r/min, and no noise exists when the input rotating speed runs in the low gear for 1 min;

2. the input rotating speed is adjusted to 2500r/min, and no noise exists when the input rotating speed runs in the low gear for 1 min;

3. the input rotating speed is adjusted to 1500r/min, and no noise exists when the high-grade running-in is carried out for 5 min;

noise is less than or equal to 91 decibels (the distance measured by a decibel meter is 300mm),

② oil pump oil pressure 0.07-0.22 Mpa;

4. the input rotating speed is adjusted to 2500r/min, and no noise exists when the high-grade running-in is carried out for 10 min;

5. adjusting the input rotating speed to 3500r/min, and running in the high-grade for 5 min:

firstly, the temperature rise is less than or equal to 90 ℃, and each part (especially a bearing cover) of the assembly has no obvious temperature abnormity and sharp rise point (an infrared thermometer);

secondly, each joint surface and the oil seal have no oil leakage phenomenon, and the position of the inner oil seal has no obvious oil mark.

In summary, the following steps: the beneficial effects of the utility model are that: the bearing is arranged at one end, connected with the transfer case, of the universal joint, and the position deviation of the connecting end of the universal joint and the transfer case is limited by the bearing. Therefore, the vibration amplitude in the running process is controlled, the noise is reduced, and the safety in the high-speed test is ensured so as to meet the requirement of the no-load test.

The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, so all equivalent technical solutions should also belong to the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims (10)

1. A transfer case no-load test drive connection, the transfer case no-load test comprising: the transfer case comprises a motor (1), a transmission connecting device (2), a transfer case (3) and a mounting frame (4), wherein the transfer case (3) is fixed on the mounting frame (4), and the motor (1) is rotatably connected with the transfer case (3) through the transmission connecting device (2); the transmission connecting device (2) comprises a universal joint (22), one end of the universal joint (22) is rotatably connected with the transfer case (3), and the other end of the universal joint (22) is rotatably connected with a rotating shaft of the motor (1); the method is characterized in that: one end of the universal joint (22) connected with the transfer case (3) is arranged in an inner ring of a bearing (25), and the position deviation of the connection end of the universal joint (22) and the transfer case (3) is limited through the bearing (25).

2. The transfer case no-load test drive connection device of claim 1, characterized in that: the bearing (25) adopts a radial ball bearing.

3. The transfer case no-load test drive connection of claim 2, characterized in that: the outer ring of the bearing (25) is fixed in a vertical adjusting block center hole (241) of a vertical adjusting block (24), and the height deviation between the connecting end of the universal joint (22) and the transfer case (3) and the rotating shaft of the transfer case (3) is adjusted by adjusting the vertical height of the vertical adjusting block (24).

4. The transfer case no-load test drive connection of claim 3, characterized in that: the vertical adjusting block (24) is arranged in the horizontal adjusting block (23), and the horizontal position deviation between the connecting end of the universal joint (22) and the transfer case (3) and the rotating shaft of the transfer case (3) is adjusted by adjusting the position of the horizontal adjusting block (23) in the horizontal direction of the connecting seat (21).

5. The transfer case no-load test transmission connection device according to any one of claims 1 to 4, characterized in that: a connecting sleeve (28), a driving plate (29) and a rotating disc (30) are arranged at the connecting end of the universal joint (22) and the transfer case (3), and the connecting sleeve (28) is sleeved in an inner ring of the bearing (25); one end of the connecting sleeve (28) is connected with the drive plate (29) in a rotating fit manner, and the other end of the connecting sleeve (28) is detachably connected with the universal joint (22); one end of the drive plate (29) is connected with the connecting sleeve (28) in a rotating fit manner, and the other end of the drive plate (29) is connected with the turntable (30) in a rotating fit manner; the rotary disc (30) is detachably connected with an input shaft of the transfer case (3).

6. The transfer case no-load test drive connection of claim 5, characterized in that: the connecting sleeve (28) is cylindrical, and an inner spline (281) is arranged in an inner hole of the connecting sleeve (28).

7. The transfer case no-load test drive connection of claim 6, characterized in that: the drive plate (29) comprises a drive plate body (292), one side of the drive plate body (292) is provided with an external spline (291) along the axial direction, and the other side of the drive plate body (292) is provided with a drive tooth (293); the external spline (291) is inserted into the internal spline (281) and slides along the internal spline (281), so that the drive plate (29) slides along the axial direction of the connecting sleeve (28).

8. The transfer case no-load test drive connection of claim 7, characterized in that: the number of the shifting teeth (293) is not less than two, the shifting teeth are uniformly distributed on one side of the shifting plate body (292), and the top end of the shifting teeth (293) is conical.

9. The transfer case no-load test drive connection of claim 8, characterized in that: a spring assembly (27) is arranged in an inner hole of the connecting sleeve (28), the spring assembly (27) adopts a compression spring, one end of the spring assembly (27) is in contact with the universal joint (22), the other end of the spring assembly (27) is in contact with the drive plate (29), and the drive plate (29) slides towards the direction of the rotary disc (30) by utilizing the spring assembly (27).

10. The transfer case no-load test drive connection of claim 9, characterized in that: the rotary disc (30) is disc-shaped, a rotary disc poking hole (301) and a rotary disc screw hole (302) are formed in the rotary disc (30), the rotary disc (30) is installed on an input shaft of the transfer case (3) through the rotary disc screw hole (302), and the rotary disc poking hole (301) is matched with the poking teeth (293) to achieve rotary connection with the drive disc (29).

Images