阅读说明：本技术 一种后桥检测设备 (Rear axle detection equipment ) 是由 朱继高 赵来成 盛港 李龙飞 于 2021-07-14 设计创作，主要内容包括：本发明涉及车辆检测技术领域,公开了一种后桥检测设备,包括机架,所述机架上设有支撑模块、检测驱动模块、刹车性能检测模块和负载模块,所述检测驱动模块包括与待检测的后桥总成连接的驱动电机,所述驱动电机固定在机架上,所述刹车性能检测模块和负载模块均安装在待检测的后桥总成的两端,本发明通过检测驱动模块来驱动后桥总成实现各工作状态的模拟：通过刹车性能检测模块来实现后桥总成在减速刹车过程中的状态模拟,通过负载模块来实现后桥总成在空载、负载或者刹车状态模拟,根据后桥总成在模拟空载、负载或者刹车时的不同工作状态下产生的噪音、异响及可能产生的各种运行状况来判断后桥总成的质量,实用性高、检测效率高,检测效果好。(The invention relates to the technical field of vehicle detection, and discloses a rear axle detection device, which comprises a rack, wherein a support module, a detection driving module, a brake performance detection module and a load module are arranged on the rack, the detection driving module comprises a driving motor connected with a rear axle assembly to be detected, the driving motor is fixed on the rack, the brake performance detection module and the load module are both arranged at two ends of the rear axle assembly to be detected, and the rear axle assembly is driven by the detection driving module to realize the simulation of each working state: the rear axle assembly is simulated in the speed reduction and braking process through the brake performance detection module, the rear axle assembly is simulated in the idle load, load or braking state through the load module, the quality of the rear axle assembly is judged according to noise, abnormal sound and various possible operation conditions generated when the rear axle assembly is simulated in the idle load, load or braking state, and the rear axle assembly is high in practicability, high in detection efficiency and good in detection effect.)

1. A rear axle check out test set which characterized in that: including frame (1), be equipped with support module (2), detection drive module (3), brake performance detection module (4) and load module (5) on frame (1), it includes driving motor (31) of being connected with rear axle assembly (6) that awaits measuring to detect drive module (3), driving motor (31) are fixed on frame (1), brake performance detection module (4) and load module (5) are all installed at the both ends of waiting the rear axle assembly (6) of measuring.

2. A rear axle detecting apparatus according to claim 1, wherein: the supporting module (2) comprises a supporting seat (21) and a positioning device, the supporting seat (21) is symmetrically arranged, the positioning device is located on the supporting seat (21), the positioning device comprises a positioning block (22), a positioning groove (23) is formed in the upper end of the positioning block (22), and the rear axle assembly (6) is matched with the positioning groove (23).

3. A rear axle detecting apparatus according to claim 2, wherein: brake performance detection module (4) are including setting up universal joint semi-axis assembly (41) at rear axle assembly (6) both ends, the one end and the rear axle assembly (6) of universal joint semi-axis assembly (41) are connected, brake assembly (42) are connected to the other end of universal joint semi-axis assembly (41).

4. A rear axle detecting apparatus according to claim 3, wherein: the load module (5) comprises a simulation counterweight module (51) and a rotating speed detection module (52) which are connected with the universal joint half shaft assembly (41).

5. A rear axle detection apparatus according to claim 4, wherein: simulation counter weight module (51) include balancing weight (511) be connected with universal joint semi-axis assembly (41), balancing weight (511) below is equipped with adjusting screw (512) and pull rod (513), the upper end of pull rod (513) is passed through spring (516) and is connected with balancing weight (511), the lower extreme of pull rod (513) passes through adjusting nut (514) and is connected with adjusting screw (512), adjusting screw (512) are fixed on frame (1) through the bearing frame, adjusting nut (514) and adjusting screw (512) threaded connection, the lower extreme of pull rod (513) is fixed on adjusting nut (514).

6. A rear axle detection apparatus according to claim 5, wherein: the rotating speed detection module (52) comprises a rotating speed detection sensor (521), the rotating speed detection sensor (521) is fixed on the rack (1), a rotating shaft of the rotating speed detection sensor (521) is provided with a first gear (522), the universal joint half shaft assembly (41) is provided with a second gear (523), and the first gear (522) is meshed with the second gear (523).

7. A rear axle detecting apparatus according to claim 6, wherein: and a third gear (515) is arranged on the adjusting screw rod (512), and the third gear (515) is connected with or separated from the first gear (522) through a manual adjusting device (7).

8. A rear axle detecting apparatus according to claim 7, wherein: manual adjusting device (7) include fixed axle (71) and slip cap (72), fixed axle (71) are fixed on frame (1) through bearing frame (73), slip cap (72) cover is established in the one end of fixed axle (71), slip cap (72) and fixed axle (71) axial sliding fit, slip cap (72) rotate along with fixed axle (71) synchronization, the fixed fourth gear (74) that is equipped with on fixed axle (71), fourth gear (74) and third gear (515) meshing, the fixed fifth gear (75) that is equipped with on slip cap (72), fifth gear (75) and first gear (522) meshing or separation.

Technical Field

The invention relates to the technical field of vehicle detection, in particular to a rear axle detection device.

Background

At present, before an electric tricycle manufacturer assembles a rear axle of an electric tricycle, problematic parts cannot be timely and accurately detected due to the fact that special detection equipment is not available, the rear axle with poor performance or faults cannot be timely found, various problems that the rear axle cannot operate, noise is high, abnormal sound and differential faults occur frequently after the electric tricycle is installed and delivered from a factory and the like occur, inconvenience is brought to users, safety accidents can be caused seriously, threats are caused to the safety of users, and meanwhile, bad influences can be caused to the reputation of the manufacturer.

The rear axle on the electric vehicle generally adopts a motor to drive a speed reducer to be connected with a differential mechanism to drive two half shafts on the rear axle to rotate, the rear axle is provided with a motor, the requirements can be basically met on the occasions of low power and low torque, but the requirements cannot be completely met on the occasions of high power and large torque, and the motor is easy to damage under the conditions of overlarge transmitted torque and power.

Disclosure of Invention

The invention aims to provide rear axle detection equipment which has the advantages of high practicability, high detection efficiency and good detection effect.

The technical purpose of the invention is realized by the following technical scheme:

the utility model provides a rear axle check out test set, includes the frame, be equipped with supporting module, detection drive module, brake performance detection module and load module in the frame, it includes the driving motor who is connected with the rear axle assembly that waits to detect drive module, driving motor fixes in the frame, brake performance detection module and load module are all installed at the both ends of waiting to detect the rear axle assembly.

By adopting the technical scheme, the rear axle assembly to be detected is positioned on the rack through the supporting module, and respectively with the detection driving module, brake performance detection module and load module are connected, the driving motor in the detection driving module is connected with the rear axle assembly, the simulation of working condition is realized for driving the rear axle assembly, the brake performance detection module is used for the state simulation of the rear axle assembly in the deceleration braking process, the load module is used for the working or brake state simulation of the rear axle assembly in hole load or load, the quality of the rear axle assembly is judged according to the noise, abnormal sound and various possible operation conditions generated by the rear axle assembly under different working conditions of simulating no-load, load or braking, the practicability is high, the detection efficiency is high, and the detection effect is good.

The invention is further provided with: the supporting module comprises a supporting seat and a positioning device, the supporting seat is symmetrically arranged, the positioning device is positioned on the supporting seat and comprises a positioning block, a positioning groove is formed in the upper end of the positioning block, and the rear axle assembly is matched with the positioning groove.

Through adopting above-mentioned technical scheme, the location is realized to the both ends of rear axle assembly lie in the constant head tank of locating piece respectively, guarantees that the rear axle assembly can not remove in the testing process, and this support module can be applicable to the support location of the rear axle assembly of different length, simple structure, and the commonality is good, simple to operate.

The invention is further provided with: the brake performance detection module comprises universal joint half shaft assemblies arranged at two ends of the rear axle assembly, one end of each universal joint half shaft assembly is connected with the rear axle assembly, and the other end of each universal joint half shaft assembly is connected with the brake assembly.

By adopting the technical scheme, the simulation of working state is realized by detecting the driving motor in the driving module to drive the rear axle assembly, the rear axle assembly drives the universal joint half axle assembly to synchronously work in the process of working state simulation, braking force is applied to the universal joint half axle assembly after the brake is started, and the universal joint half axle assembly applies the braking force to the rear axle assembly in the braking process, so that the simulation of the braking state is realized, the brake and the universal joint half axle assembly can adopt the existing components, the cost is low, the adaptability is good, the simulation process is more real, and the detection effect is good.

The invention is further provided with: the load module comprises a simulation counterweight module and a rotating speed detection module which are connected with the universal joint half shaft assembly.

By adopting the technical scheme, the simulation counterweight grinding block is used for realizing the simulation of the working state or the braking state of the rear axle assembly under the load, and the rotating speed detection module is used for realizing the simulation of the working state of the rear axle assembly under the no-load or load state and under different rotating speeds, so that the detection of the rear axle assembly under more working states is realized, and the quality detection accuracy is further improved.

The invention is further provided with: the simulation counter weight module includes the balancing weight of being connected with universal joint semi-axis assembly, the balancing weight below is equipped with adjusting screw and pull rod, the upper end of pull rod is connected with the balancing weight through the spring, the lower extreme of pull rod passes through adjusting nut and is connected with adjusting screw, adjusting screw passes through the bearing frame to be fixed in the frame, adjusting nut and adjusting screw threaded connection, the lower extreme of pull rod is fixed on adjusting nut.

Through adopting above-mentioned technical scheme, when rotating adjusting screw, adjusting nut is along adjusting screw upwards or downstream, thereby upwards push away or draw the balancing weight downwards, make the balancing weight exert the power of equidimension not to universal joint semi-axis assembly, thereby realize the operating condition's of rear axle assembly at different loads simulation, when adjusting screw positive and negative rotation in turn, adjusting nut is along adjusting screw up-and-down alternate motion, thereby realize that the pull rod pushes up and the process of pulling down goes on in turn, thereby realize the simulation of the state of jolting, accord with the actual conditions of the process of traveling more.

The invention is further provided with: the rotation speed detection module comprises a rotation speed detection sensor which is fixed on the rack, a first gear is arranged on a rotating shaft of the rotation speed detection sensor, a second gear is arranged on the universal joint half shaft assembly, and the first gear is meshed with the second gear.

Through adopting above-mentioned technical scheme, the universal joint semi-axis assembly drives the second gear rotatory at the during operation, it is rotatory to drive first gear when the second gear is rotatory, it is rotatory to drive the pivot synchronous revolution of rotational speed detection sensor when first gear is rotatory, rotational speed detection sensor can detect the rotational speed of rear axle assembly through the rotational speed that detects universal joint semi-axis assembly, and show the rotational speed information that detects, carry out the no-load to the rear axle assembly when the rotational speed of difference, the simulation of different operating condition such as load or brake, in order to realize the comprehensive detection of rear axle assembly operating condition.

The invention is further provided with: and a third gear is arranged on the adjusting screw rod and is connected with or separated from the first gear through a manual adjusting device.

By adopting the technical proposal, since the adjusting screw rod can be driven by the first gear which is driven by the second gear, the second gear is driven by a universal joint half shaft assembly which is driven by a rear axle assembly, therefore, when the third gear is connected with the first gear, the rear axle assembly can drive the adjusting screw rod to rotate, the counterweight block can apply different forces to the universal joint half shaft assembly by adjusting the rotation of the screw rod without changing the weight of the counterweight block, the detection driving module and the load module work cooperatively through the adjusting screw rod, manual adjustment is not needed, time and labor are saved, and when third gear and first gear separation, adjusting screw can't pass through the rear axle assembly drive, and the force that the balancing weight exerted to universal joint semi-axis assembly this moment is self gravity, can only simulate the operating condition of rear axle assembly when empty load this moment.

The invention is further provided with: the manual adjusting device comprises a fixed shaft and a sliding sleeve, the fixed shaft is fixed on the rack through a bearing seat, the sliding sleeve is sleeved at one end of the fixed shaft and matched with the fixed shaft in an axial sliding mode, the sliding sleeve rotates synchronously along with the fixed shaft, a fourth gear is fixedly arranged on the fixed shaft and meshed with a third gear, a fifth gear is fixedly arranged on the sliding sleeve and meshed or separated with the first gear.

By adopting the technical scheme, when the sliding sleeve axially slides along the fixed shaft, the fifth gear is meshed with or separated from the first gear along with the sliding sleeve axially sliding process, when the fifth gear is meshed with the first gear, the fifth gear is driven to rotate through the first gear, so that the sliding sleeve is driven to rotate, the fixed shaft is driven to rotate when the sliding sleeve rotates, the fourth gear is driven to rotate when the fixed shaft rotates, the third gear is driven to rotate when the fourth gear rotates, so that the third gear is connected with the first gear, when the fifth gear is separated from the first gear, the fifth gear cannot be driven to rotate through the rotation of the first gear, so that the third gear cannot be driven to rotate, so that the separation of the third gear from the first gear is realized, the whole structure is ingenious in design, and the adjusting process is simple.

The invention has the beneficial effects that:

1. the detection driving module is connected with the rear axle assembly and used for driving the rear axle assembly to realize the simulation of the working state, the braking performance detection module is used for the state simulation of the rear axle assembly in the process of deceleration and braking, the load module is used for the working or braking state simulation of the rear axle assembly in no load or load, and the quality of the rear axle assembly is judged according to the noise and abnormal sound generated by the rear axle assembly in different working states in the process of simulating no load, load or braking and various possible running conditions.

2. The invention detects that the driving motor in the driving module drives the rear axle assembly to realize the simulation of the working state, the rear axle assembly drives the universal joint half shaft assembly to synchronously work in the process of the working state simulation, the brake is started to apply the braking force to the universal joint half shaft assembly, and the universal joint half shaft assembly applies the braking force to the rear axle assembly in the braking process, thereby realizing the simulation of the braking state.

3. According to the universal joint half shaft assembly, whether the adjusting screw rod rotates or not is controlled through connection or separation of the third gear and the first gear which are arranged on the adjusting screw rod, the fact that the balancing weight exerts different forces on the universal joint half shaft assembly is achieved according to the rotation condition of the adjusting screw rod, the weight of the balancing weight does not need to be changed, the detection driving module and the load module work in a cooperative mode through the adjusting screw rod, manual adjustment is not needed, and time and labor are saved.

4. When the manual adjusting device is used for adjusting the connection or the separation of the third gear and the first gear, the sliding sleeve is pulled to slide along the axial direction of the fixed shaft, the fifth gear is meshed with or separated from the first gear in the process of sliding along with the sliding sleeve in the axial direction, when the fifth gear is meshed with the first gear, the fifth gear is driven to rotate through the first gear, thereby driving the sliding sleeve to rotate, driving the fixed shaft to rotate when the sliding sleeve rotates, driving the fourth gear to rotate when the fixed shaft rotates, driving the third gear to rotate when the fourth gear rotates, thereby realizing the connection of the third gear and the first gear, when the fifth gear is separated from the first gear, the first gear can not drive the fifth gear to rotate, so the third gear can not be driven to rotate, thereby realized the separation of third gear and first gear, whole structural design is ingenious, and accommodation process is simple.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a rear axle inspection apparatus of the present invention connected to a rear axle assembly.

Fig. 2 is a partially enlarged view of a in fig. 1.

Fig. 3 is a schematic perspective view of a rear axle inspection apparatus according to the present invention.

Fig. 4 is a schematic structural diagram of a sliding sleeve in the rear axle detection device of the present invention.

In the figure, 1, a frame; 2. a support module; 21. a supporting seat; 22. positioning blocks; 23. positioning a groove; 3. a detection driving module; 31. a drive motor; 4. a brake performance detection module; 41. a universal joint half shaft assembly; 42. a brake actuator assembly; 5. a load module; 51. simulating a counterweight module; 511. a balancing weight; 512. adjusting the screw rod; 513. a pull rod; 514. adjusting the nut; 515. a third gear; 516. a spring; 52. a rotation speed detection module; 521. a rotation speed detection sensor; 522. a first gear; 523. a second gear; 6. a rear axle assembly; 7. a manual adjustment device; 71. a fixed shaft; 72. a sliding sleeve; 73. a bearing seat; 74. a fourth gear; 75. a fifth gear; 76. positioning holes; 77. and a positioning pin.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

Referring to fig. 1 to 4, a rear axle detecting apparatus includes a frame 1, a supporting module 2, a detecting driving module 3, a braking performance detecting module 4 and a load module 5 are disposed on the frame 1, the detecting driving module 3 includes a driving motor 31 connected to a rear axle assembly 6 to be detected, the driving motor 31 is fixed on the frame 1, the braking performance detecting module 4 and the load module 5 are both mounted at two ends of the rear axle assembly 6 to be detected, the rear axle assembly 6 to be detected is positioned on the frame 1 through the supporting module 2 and is respectively connected to the detecting driving module 3, the braking performance detecting module 4 and the load module 5, the driving motor 31 in the detecting driving module 3 is connected to the rear axle assembly 6 for driving the rear axle assembly 6 to realize the simulation of the working state, and the performance of the rear axle assembly 6 is judged according to whether the rear axle assembly 6 generates abnormal sound when simulating the working state, brake performance detection module 4 is used for the state simulation of rear axle assembly 6 at the speed reduction braking in-process, whether produce the abnormal sound when simulating speed reduction braking state according to rear axle assembly 6 and judge rear axle assembly 6's performance, load module 5 is used for rear axle assembly 6 to work or the braking state simulation when no-load or load, judge the quality of rear axle assembly according to the noise that rear axle assembly 6 produced under the different operating condition when simulating no-load, load or braking, abnormal sound and the various running conditions that probably produce, the practicality is high, detection efficiency is high, detection effect is good.

Further, support module 2 including the symmetry support 21 that sets up and be located the positioner on support 21, positioner includes locating piece 22, the upper end of locating piece 22 is equipped with constant head tank 23, rear axle assembly 6 and constant head tank 23 match each other, and rear axle assembly 6's both ends are arranged in constant head tank 23 of locating piece 22 respectively and realize the location, guarantee that rear axle assembly 6 can not remove in the testing process, and this support module 2 can be applicable to the support location of the rear axle assembly of different length, simple structure, and the commonality is good, simple to operate.

Furthermore, the braking performance detection module 4 includes universal joint half shaft assemblies 41 arranged at two ends of the rear axle assembly 6, one end of the universal joint half shaft assembly 41 is connected with the rear axle assembly 6, the other end of the universal joint half shaft assembly 41 is connected with the brake assembly 42, it is detected that the driving motor 31 in the driving module 3 drives the rear axle assembly 6 to realize the simulation of the working state, the rear axle assembly 6 drives the universal joint half shaft assembly 41 to synchronously work in the process of the simulation of the working state, the brake assembly 42 applies the braking force to the universal joint half shaft assembly 41 after being started, the universal joint half shaft assembly 41 applies the braking force to the rear axle assembly 6 in the braking process, so as to realize the simulation of the braking state, the brake assembly 42 and the universal joint half shaft assembly 41 can both adopt the existing components, the cost is low, the adaptability is good, the simulation process is more real, and the detection effect is good.

Further, the load module 5 includes a simulation counterweight module 51 and a rotation speed detection module 52 connected to the universal joint half-shaft assembly 41, the simulation counterweight module 51 is used to realize the simulation of the working state or the braking state of the rear axle assembly 6 under load, and the rotation speed detection module 52 is used to realize the simulation of the working state of the rear axle assembly 6 under no-load or load state and at different rotation speeds, so as to realize the detection of the rear axle assembly 6 under more working states, and further improve the quality detection accuracy.

Further, the simulated counterweight module 51 comprises a counterweight block 511 connected with the universal joint half-shaft assembly 41, an adjusting screw 512 and a pull rod 513 are arranged below the counterweight block 511, the upper end of the pull rod 513 is connected with the counterweight block 511 through a spring 516, the lower end of the pull rod 513 is connected with the adjusting screw 512 through an adjusting nut 514, the adjusting screw 512 is fixed on the frame 1 through a bearing seat, the adjusting nut 514 is in threaded connection with the adjusting screw 512, the lower end of the pull rod 513 is fixed on the adjusting nut 514, when the adjusting screw 512 is rotated, the adjusting nut 514 moves upwards or downwards along the adjusting screw 512, so as to push or pull the counterweight block 511 upwards, so that the counterweight block 511 applies different forces to the universal joint half-shaft assembly 41, thereby realizing the simulation of the working state of the rear axle assembly 6 under different loads, when the adjusting screw 512 rotates forwards and backwards alternately, the adjusting nut 514 moves up and down alternately along the adjusting screw 512, so that the processes of pushing up and pulling down the pull rod 513 are performed alternately, and the simulation of the bumping state is realized, which is more in line with the actual situation of the driving process.

Further, the rotation speed detecting module 52 includes a rotation speed detecting sensor 521, the rotation speed detecting sensor 521 is fixed on the frame 1, a first gear 522 is arranged on a rotating shaft of the rotating speed detection sensor 521, a second gear 523 is arranged on the universal joint half shaft assembly 41, the first gear 522 is meshed with the second gear 523, the universal joint half-shaft assembly 6 drives the second gear 523 to rotate when working, the second gear 523 drives the first gear 522 to rotate when rotating, the first gear 522 drives the rotating shaft of the rotating speed detection sensor 521 to synchronously rotate when rotating, the rotating speed detection sensor 521 can detect the rotating speed of the rear axle assembly 6 by detecting the rotating speed of the universal joint half-shaft assembly 41 and display the detected rotating speed information, according to the simulation of different working states such as no load, load or brake and the like of the rear axle assembly 6 at different rotating speeds, the comprehensive detection of the working state of the rear axle assembly 6 is realized.

Furthermore, the adjusting screw 512 is provided with a third gear 515, the third gear 515 is connected with or separated from the first gear 522 through a manual adjusting device 7, since the adjusting screw 512 can be driven by the first gear 522, the first gear 522 is driven by the second gear 523, the second gear 523 is driven by the universal joint half-shaft assembly 41, and the universal joint half-shaft assembly 41 is driven by the rear axle assembly 6, when the third gear 515 is connected with the first gear 522, the rear axle assembly 6 can drive the adjusting screw 512 to rotate, by rotating the adjusting screw 512, the counterweight 511 can apply different forces to the universal joint half-shaft assembly 41, without changing the weight of the counterweight 511, and the detecting drive module 3 and the load module 5 can cooperatively work through the adjusting screw 512, without manual adjustment, time and labor are saved, and when the third gear 515 is separated from the first gear 522, the adjusting screw 512 cannot be driven by the rear axle assembly 6, at this time, the force applied by the counterweight block 511 to the universal joint half-shaft assembly 41 is the gravity of the counterweight block, and at this time, the working state of the rear axle assembly 6 in no-load can only be simulated.

Further, the manual adjusting device 7 includes a fixed shaft 71 and a sliding sleeve 72, the fixed shaft 71 is fixed on the frame 1 through a bearing seat 73, the sliding sleeve 72 is sleeved on one end of the fixed shaft 71, the sliding sleeve 72 is axially and slidably engaged with the fixed shaft 71, the sliding sleeve 72 synchronously rotates with the fixed shaft 71, a fourth gear 74 is fixedly arranged on the fixed shaft 71, the fourth gear 74 is engaged with the third gear 515, a fifth gear 75 is fixedly arranged on the sliding sleeve 72, the fifth gear 75 is engaged with or separated from the first gear 522, when the sliding sleeve 72 axially slides along the fixed shaft 71, the fifth gear 75 is engaged with or separated from the first gear 522 in the process of axially sliding along the sliding sleeve 72, and in a natural state, the sliding sleeve 72 axially moves downwards along the fixed shaft 71, at the moment, the first gear 522 is separated from the fifth gear 75, when the sliding sleeve 72 is pulled upwards, the fifth gear 75 moves upwards along with the sliding sleeve 72 until the fifth gear 75 is meshed with the first gear 522, then the positioning pin 77 is inserted into the positioning hole 76 arranged on the sliding sleeve 72, so that the position of the fifth gear 75 is fixed, and the fifth gear is kept in a state of being meshed with the first gear 522, the fifth gear 75 can be driven to rotate by the first gear 522, so as to drive the sliding sleeve 72 to rotate, the fixed shaft 71 is driven to rotate when the sliding sleeve 72 rotates, the fourth gear 74 is driven to rotate when the fixed shaft 71 rotates, the third gear 515 is driven to rotate when the fourth gear 74 rotates, so that the connection between the third gear 515 and the first gear 522 is realized, when the fifth gear 75 is separated from the first gear 522, the fifth gear 522 cannot be driven to rotate by the first gear 522, so that the third gear 515 cannot be driven to rotate, so that the third gear 515 is separated from the first gear 522, and the whole structure is skillfully designed, the adjusting process is simple.

The working principle of the invention is as follows: the driving motor 31 is started, the rear axle assembly 6 is driven to realize the simulation of the working state, the performance of the rear axle assembly 6 is judged according to whether the rear axle assembly 6 generates abnormal sound when simulating the working state, the braking performance detection module 4 is connected with the rear axle assembly 6, the braking performance detection module 4 is started to realize the state simulation of the rear axle assembly 6 in the deceleration braking process, the performance of the rear axle assembly 6 is judged according to whether the rear axle assembly 6 generates abnormal sound when simulating the deceleration braking state, the load module 5 comprises a simulation counterweight module 51 and a rotating speed detection module 52 which are connected with the universal joint half shaft assembly 41, the simulation of the working state or the braking state of the rear axle assembly 6 when being loaded is realized through the simulation counterweight module 51, the simulation of the working state of the rear axle assembly 6 at different rotating speeds under the no-load or loaded state is realized through the rotating speed detection module 52, thereby realizing the detection of the rear axle assembly 6 in more working states, further improving the accuracy of quality detection.