CN102305706B - Working condition experimental device of automotive front driving shaft - Google Patents

Abstract

The invention discloses a working condition experimental device of an automotive front driving shaft. The working condition experimental device comprises a drive system, a resistance system, a base and a friction block, wherein the drive system comprises a drive device and a spline connection end connecting the drive device with the mounting end of a drive semi-shaft inner ball cage; and the resistance system is fixed on the base and is provided with a first spline connection end connected with the mounting end of the drive semi-shaft outer ball cage, and the friction block is contacted with a spindle of a second spline connection end. A model automobile eight-shaped curve road experiment of the device can be used for effectively detecting whether the problems of quality and design exist in the semi-shaft; and the whole device is simple in structure, convenient in assembly and fast and efficient in checking process, quality and efficiency of check on the drive semi-shaft are improved, and checking cost and working intensity and difficulty of checking operation are reduced.

Description

An experimental device for the working condition of the front drive shaft of an automobile

technical field

The invention relates to an experimental device for a front drive shaft of an automobile; more specifically, it relates to an experimental device for simulating the working condition of the front drive shaft in a "8" curve road experiment.

Background technique

The front drive shaft of a car is a safety component on a car. If there is a serious quality problem, it may cause serious consequences of car crash. In order to avoid production quality defects, the quality of the half shaft must be checked during the design and manufacturing process. Carry out preventive verification, find out in advance the quality hidden dangers in the design or manufacturing process of the half shaft, and reduce the risk to the final consumer. Verify the quality defect, find out the problem and change it in time to minimize the risk; at the same time, it can also reproduce the fault of the drive shaft returned from the main engine factory to the half shaft manufacturer, so as to better find the root of the quality problem, and thus more quickly , Solve quality problems conveniently.

At present, there is no professional inspection equipment for the experiment of the front drive axle shaft. Usually, the half axle is assembled on the car for "8" curve road test, which can detect the work of the front drive axle under various normal and limit states. The situation has played a preventive role in the quality problems that may exist in the design verification, manufacturing and assembly of the half shaft. According to the original method of dismantling, analyzing, and discussing to make a judgment, not only the efficiency is low, but the work skills and experience of the analysis staff are high, and it can only be processed and corrected after the event, and cannot be prevented and verified in advance. , will bring more troubles and consequences such as quality improvement lag to the axle shaft manufacturers.

Contents of the invention

The technical problem to be solved by the present invention is to realize a working condition inspection device for the front drive shaft of an automobile, which can effectively reflect the problems existing in the design of the drive shaft.

In order to achieve the above object, the technical solution adopted by the present invention is: an experimental device for the working condition of the front drive shaft of an automobile, including a drive system, a resistance system and a base, and the drive system includes a drive device and a drive device connected to the drive half shaft The first spline connection end of the installation end of the inner ball cage, the resistance system is fixed on the base, and the resistance system is provided with a second spline connection end connected with the installation end of the outer ball cage of the driving half shaft, and connected with the second The friction block that contacts the rotating shaft at the end of the splined connection.

The base includes a vertical adjustment base, a turntable, a horizontal base, and a wheelbase base. The wheelbase base is fixed on the wheelbase guide rail extending from the drive system, and the wheelbase base is provided There is a horizontal guide rail perpendicular to the wheelbase guide rail, the horizontal base is fixed on the horizontal guide rail, the turntable is fixed on the horizontal base through a pin shaft in the center, and the vertical adjustment base includes a fixed part, a sliding part and locking device, the fixed part is fixed on the horizontal base and is vertically provided with a guide rail, the sliding part is provided with a chute matching the guide rail of the fixed part, and the resistance system is fixed on the sliding part .

The turntable is provided with an arc-shaped central angle scale. When the base, the center of the turntable, and the drive system are vertically adjusted on a straight line, the point where the central angle scale crosses the straight line is 0°, and the angle scales increase toward both sides. .

The turntable, the horizontal base, and the wheelbase base are all provided with locking devices for fixing.

The turntable is provided with an arc-shaped rotation slot, and a turntable locking device is inserted in the rotation slot, one end of which is provided with an external thread and fixed in the screw hole of the horizontal base through the rotation slot, and the other end is provided with a rotation For the handle, the outer diameter of the handle end is greater than the width of the rotating groove.

The driving device includes a motor, a speed reducer connected with the circuit, and a coupling connecting the speed reducer and the first spline connection end.

The resistance system includes a cylinder, a second spline connection end and a friction block, one end of the cylinder piston rod is connected to the friction block, and the friction block clamps the rotating shaft connected to the second spline connection end and The shaft applies pressure.

The experimental device is set on a test bench, the test bench is provided with a control panel, and the control module of the control panel is connected with the motor and the cylinder.

The advantage of the present invention is that the device can effectively detect whether there are quality and design problems of the half-shaft as a model car "8" curved road test, so as to guide the design of the half-shaft and the hidden dangers of various quality problems existing on the half-shaft on the car. Expose it so that design defects can be found in the early stage of half shaft design and the root cause of half shaft quality hidden dangers can be found more quickly. Moreover, the whole experimental device has a simple structure, convenient assembly, fast and efficient inspection process, improves the inspection quality and efficiency of the driving half shaft, and reduces the inspection cost and the work intensity and difficulty of the inspection personnel.

Description of drawings

The following is a brief description of the content expressed in each drawing in the description of the present invention and the marks in the figure:

Fig. 1 is the schematic diagram of experimental device structure;

Fig. 2 is a top view of the experimental device shown in Fig. 1;

Fig. 3 is the front drive shaft driving device of the experimental device shown in Fig. 1;

Fig. 4 is the front drive shaft resistance device of experimental device shown in Fig. 1;

Fig. 5 is the base locking system of the experimental device shown in Fig. 1;

The marks in the above figures are: 1. Motor; 2. Reducer; 3. Coupling; 4. First spline connection end; 5. Driving half shaft; 6. Second spline connection end; 7. Vertical Adjusting base; 8. Friction block; 9. Cylinder; 10. Turntable; 11. Horizontal base; 12. Wheelbase base; 13. Wheelbase guide rail; 14. Locking device for horizontal base; 15. Wheelbase base Seat locking device; 16. Turntable locking device; 17. Rotary slot.

Detailed ways

Referring to Figures 1 and 2, it can be seen that this experimental device is a device installed on the test bench to simulate the "8" curve experiment of the car. It is mainly composed of a drive system, a resistance system and a base. end, the resistance system is fixed on the base, and during inspection, one end of the front drive half shaft 5 of the automobile is fixed on the drive system, and the other end is fixed on the resistance system. Specifically, referring to Fig. 3, the drive system includes a motor 1, a reducer 2, a coupling 3 and a first spline connection end 4, and one end of the reducer 2 is connected to the motor 1 and the other end is connected to the first spline through a coupling The connection end 4 is connected, and the first spline connection end 4 is a connection port similar to the internal spline connection of the bevel gear, which is used to connect with the inner ball cage installation end of the driving half shaft 5, thereby completely imitating the connection between the automobile differential and the half shaft The assembly method provides rotational power for the drive half shaft 5 . Referring to Fig. 4, the resistance system mainly includes a cylinder 9, a second spline connection end 6 and a friction block 8, and the second spline connection end 6 is a spline connection port similar to an inner hub, and is used for connecting with the outer spherical cage of the driving half shaft 5 The installation end is connected, so as to completely imitate the assembly method of the automobile wheel hub and the half shaft, and ensure the consistency with the installation of the automobile. A friction block 8 is arranged around the rotating shaft extending from the second spline connection end 6 to the inside of the resistance system. The friction block 8 is connected to the piston rod of the cylinder 9, and the output pressure of the cylinder 9 drives the friction block 8 to clamp the rotating shaft, so as to simulate the resistance caused by the weight of the vehicle body or other reasons during the starting or running of the vehicle, so as to verify the performance of the half shaft under load. Working conditions. Among these components, the output torque of the reducer is 97N.m, the air source pressure of cylinder 9 is 0.7MPa, the output force of the cylinder is 860KG, and the frictional resistance is 8600x0.2=1720N. A control panel for controlling the cylinder 9 and the motor 1 is also provided on the test bench, and the control modules of the panel are connected with the motor 1 and the cylinder 9 respectively. There is a key-activated power switch on the control panel, connect the air source, press the start button, and the device will start to operate. The control panel also has an emergency stop button. When the device is abnormal, you can press the button to stop the device from working or automatically stop working.

The base is used to provide the adjustment of the 4 degrees of freedom of the resistance system, to simulate conditions such as steering and bumping after the driving half shaft 5 is assembled on the car, and at the same time enhance the versatility of the device, so that the experimental device can test different types of driving half shafts 5, The 4 degrees of freedom include the distance adjustment between the resistance system and the drive system, the lateral adjustment of the resistance system, the height adjustment of the resistance system, and the horizontal rotation index adjustment of the simulated steering.

Specifically, the base includes a vertical adjustment base 7, a turntable 10, a horizontal base 11 and a wheelbase base 12. Two parallel wheelbase guide rails 13 are arranged between the drive system and the base, and the Extending outward, the distance scale is also marked on the wheelbase guide rail 13, thereby marking the distance between the drive system and the resistance system. The wheelbase base 12 of the base is provided with a chute that matches the wheelbase guide rail 13 and placed On the guide rail 13, the distance between the resistance system and the drive system installed on the base can be adjusted to adapt to the length of the driving half shaft 5 of different models and models. The wheelbase base 12 is provided with a wheelbase base locking device 15, as can be seen from Figure 5, the wheelbase base locking device 15 is a straight rod, one end is a handle, and one end is vertically provided with a locking block, The outer end of the deadlock block is in contact or not in contact with the tabletop of the test bench as the handle moves up and down. The middle of the straight bar is hinged on a protrusion of the axle base 12. There is also a The connecting rod, the two ends of the connecting rod are respectively hinged with the protrusion and the straight rod, and the locking block is made of a material with a large friction coefficient with the table top of the test bench. After adjusting the position of the wheelbase base 12 on the distance guide rail 13, press down the handle end of the straight bar of the wheelbase base locking device 15 so that the locking block fits closely with the table top of the test bench, then the locking axis can be achieved. The effect of being 12 away from the base, when readjusting, just lift the handle end of the straight rod.

The wheelbase base 12 is horizontally provided with a horizontal guide rail perpendicular to the wheelbase guide rail 13, the horizontal base 11 is provided with a chute matching with the horizontal guide rail and the horizontal base 11 is fixed on the wheelbase base 12, 11 Move laterally along the horizontal guide rail to realize the lateral adjustment of the resistance system, imitating the installation position of the automobile half shaft, the projection of the installation position of the inner and outer ball cages on the horizontal plane of different models is different, so the lateral adjustment of the testing machine workbench meets the needs of different models need. The horizontal base 11 is provided with a horizontal base locking device 14, the structure of which is the same as that of the wheelbase base locking device 15, and the base is fixed by horizontal friction with the table top of the test bench.

The turntable 10 is circular, and its center position is fixed on the horizontal base 11 through the pin shaft in the center, so that the turntable 10 can rotate 360° on the horizontal base 11, and the vertical adjustment base 7 is fixed on the horizontal base 11. Fixed at the position between the pin shaft and the edge of the horizontal base 11, the rotation of the horizontal base 11 can realize the horizontal rotation indexing adjustment of the simulated steering, and an arc-shaped central angle scale is provided at the edge of the turntable 10, when When vertically adjusting the base 7, the center pin shaft of the turntable 10, and the drive system are on a straight line, that is, the axis of the entire device, the point where the central angle scale crosses this axis is marked as 0°, and the angle scale increases toward both sides. Each can be extended to 45°. A pointer extending upward to the surface of the horizontal base 11 is provided at the center of the side of the horizontal base 11 facing the drive system, thereby accurately indicating the degree of rotation of the turntable 10. On the turntable 10 The inner side of the central angle scale is provided with an arc-shaped rotating groove 17, and a turntable locking device 16 is inserted in the rotating groove 17. One end of the rotating disk locking device 16 is an external thread and is fixed to the horizontal base 11 through the rotating groove 17. In the screw hole, the other end is provided with a rotating handle, and the outer diameter of the handle end is larger than the width of the rotating groove 17. When the rotating disk locking device 16 is tightened, the rotating groove 17 will be locked, thereby fixing the movement of the rotating disk 10, and loosening the locking of the rotating disk. The device 16 can adjust the rotation of the turntable 10 to the required degree. When the device is arranged, the line connecting the 0° position of the center angle scale and the center position of the vertical adjustment base 7 passes through the center of the turntable 10, and it is usually rotated to the 40° position during the experiment. Simulate the state of the steering wheel being killed.

The vertical adjustment base 7 includes a fixed part, a sliding part and a locking device, wherein the fixed part is fixed on the horizontal base 11, the sliding part is fixed on the fixed part and can slide vertically along the fixed part, and the resistance system is fixed In the sliding part, the resistance system is adjusted in the vertical direction, imitating the state of the semi-axis of the car wheel in bumpy road conditions. The fixed part is provided with a guide rail, and the sliding part is provided with a matching chute to realize the vertical sliding of the device. A locking device is provided between the fixed part and the sliding part. The structure of the device can be similar to that of a turntable Locking device 16.

To sum up, the adjustable base with 4 degrees of freedom, after assembling the driving half shaft 5 on the vehicle, it can be used on various uneven road surfaces, the state of the left or right front wheel bouncing up and down, the swing angle in the horizontal direction, and the swing angle in the vertical direction. The spatial movement on the surface and the various limit states of the above-mentioned combination are clearly presented on the test bench, so as to quickly check whether the abnormal noise, jitter, center distance is reasonable, whether the inner and outer rubber sleeves are connected to the shaft or itself. interference etc.

Claims (7)

1. An automobile front drive shaft operating condition experimental device, characterized in that: it includes a drive system, a resistance system and a base, and the drive system includes a drive device and is connected to the drive device and the inner spherical cage of the drive half shaft (5). The first spline connection end (4) at the end, the resistance system is fixed on the base, and the resistance system is provided with a second spline connection end (6) connected to the installation end of the outer ball cage of the driving half shaft (5) , and the friction block (8) in contact with the rotating shaft of the second spline connection end (6); The base includes a vertical adjustment base (7), a turntable (10), a horizontal base (11), and a wheelbase base (12), and the wheelbase base (12) is fixed on the drive system On the extended wheelbase guide rail (13), and the wheelbase base (12) is provided with a horizontal guide rail perpendicular to the wheelbase guide rail (13), the horizontal base (11) is fixed on the horizontal guide rail, the The above-mentioned turntable (10) is fixed on the horizontal base (11) through the pin shaft in the center, and the above-mentioned vertical adjustment base (7) includes a fixed part, a sliding part and a locking device, and the above-mentioned fixed part is fixed on the horizontal base (11). Guide rails are arranged vertically on the base (11), the sliding part is provided with a slide groove matching the guide rail of the fixed part, and the resistance system is fixed on the sliding part. 2. The vehicle front drive shaft working condition experimental device according to claim 1, characterized in that: the turntable (10) is provided with an arc-shaped central angle scale, when vertically adjusting the base (7), turntable ( 10) When the center and the drive system are on a straight line, the point where the center angle scale passes the line is 0°, and the angle scale increases toward both sides. 3. The vehicle front drive shaft operating condition experimental device according to claim 1, characterized in that: the turntable (10), the horizontal base (11), and the wheelbase base (12) are all equipped with locking device. 4. The experimental device for the working condition of the front drive shaft of the automobile according to claim 2 or 3, characterized in that: the turntable (10) is provided with an arc-shaped rotating groove (17), and the inside of the rotating groove (17) A turntable locking device (16) is inserted, one end of which is provided with an external thread and is fixed in the screw hole of the horizontal base (11) through the rotating groove (17), and the other end is provided with a rotating handle, and the outer end of the handle is The diameter is greater than the width of the rotary groove (17). 5. The vehicle front drive shaft operating condition experimental device according to claim 1, characterized in that: the drive equipment includes a motor (1), a reducer (2) connected to the circuit, and a reducer (2) connected to Coupling (3) for first splined end (4). 6. The vehicle front drive shaft working condition experimental device according to claim 1, characterized in that: the resistance system includes a cylinder (9), a second spline connection end (6) and a friction block (8), the One end of the piston rod of the cylinder (9) is connected to the friction block (8), and the friction block (8) clamps the rotating shaft connected to the second spline connection end (6) and exerts pressure on the rotating shaft. 7. The vehicle front drive shaft operating condition experimental device according to claim 5, characterized in that: the experimental device is arranged on a test bench, and the described test bench is provided with a control panel, and the control module of the control panel Connect with motor (1) and cylinder (9).

Images