CN112098076A - Knuckle endurance test platform - Google Patents
Knuckle endurance test platform Download PDFInfo
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- CN112098076A CN112098076A CN202011000732.2A CN202011000732A CN112098076A CN 112098076 A CN112098076 A CN 112098076A CN 202011000732 A CN202011000732 A CN 202011000732A CN 112098076 A CN112098076 A CN 112098076A
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- servo actuator
- arm
- knuckle
- steering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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- General Physics & Mathematics (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Abstract
The invention relates to the technical field of knuckle detection, in particular to a knuckle endurance test bed which comprises a frame, a steering arm, a bridge body and a hub ring, one end of the steering arm is connected with a steering arm connecting hole of the steering knuckle, the other end of the steering arm is connected with a first servo actuator, a load force arm is arranged on the side surface of the hub ring, a second servo actuator and a third servo actuator are arranged above the load force arm, a fourth servo actuator is arranged on the side surface of the load force arm, the bridge body is fixedly connected with the frame through a support, the cylinder bodies of the first servo actuator, the second servo actuator, the third servo actuator and the fourth servo actuator are respectively hinged with the shaft seat, the axle seat is fixedly connected with the rack, and the dynamic load simulation device is scientific in structure, can simulate the dynamic load of the steering knuckle, and is convenient for carrying out a durability test.
Description
Technical Field
The invention relates to the technical field of knuckle detection, in particular to a knuckle durability test bed.
Background
In the development process of automobiles, automobile manufacturers often adopt a test field durability test to evaluate the quality of developed automobile models and related parts. Some fatigue problems of the product can be found only through tests, and after the problems are found and optimized and improved, a new test field durability test is needed to check. Therefore, in general, the durability test of the automobile test field needs to be carried out for a plurality of wheels, thereby prolonging the development period of the whole automobile.
The steering knuckle is one of main parts on an automobile steering axle, can enable an automobile to stably run and sensitively transmit the running direction, and has the function of bearing the front load of the automobile and supporting and driving a front wheel to rotate around a main pin so as to enable the automobile to steer. For the durability test of the steering knuckle, a test field durability test is generally adopted in the prior art, or simulation is utilized to calculate, the test is complex and long in period, and data has certain deviation.
Disclosure of Invention
The invention aims to provide a steering knuckle endurance test bed which is scientific in structure, can simulate dynamic load of a steering knuckle and conveniently performs endurance test aiming at the defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a knuckle endurance test bed comprises a frame, a steering arm, a bridge body connected with a knuckle ear part through a main pin, and a hub ring, one end of the steering arm is connected with a steering arm connecting hole of the steering knuckle, the other end of the steering arm is connected with a first servo actuator used for providing steering load for the steering knuckle, a load force arm is arranged on the side surface of the hub ring, a second servo actuator for providing longitudinal load and a third servo actuator for providing lateral load are arranged above the load force arm, a fourth servo actuator for providing steering damping is arranged on the side surface of the load force arm, the bridge body is fixedly connected with the rack through a support, the cylinder bodies of the first servo actuator, the second servo actuator, the third servo actuator and the fourth servo actuator are respectively hinged with a shaft seat, and the shaft seat is fixedly connected with the rack.
Furthermore, the load force arm comprises a connecting part, a first force arm and a second force arm, the connecting part is connected with the axial side face of the hub ring through a bolt, the first force arm extends upwards from the upper end of the connecting part and then is connected with the third servo actuator, and the second force arm extends horizontally from the side face of the connecting part and then is connected with the fourth servo actuator.
Further, the second servo actuator is located above the hub ring, and the lower end of the second servo actuator is connected with the hub ring through a bolt.
Further, first servo actuator's telescopic link pass through the bearing with the knuckle arm is connected, first servo actuator's cylinder body with the frame is articulated, second servo actuator's telescopic link pass through bearing, bolt and the wheel hub circle is connected, second servo actuator's cylinder body with the frame is articulated, third servo actuator's telescopic link passes through the bearing and is connected with first power arm, third servo actuator's cylinder body with the frame is articulated.
Further, the wheel hub ring comprises a wheel hub shaft sleeved outside the steering knuckle rod part, flange plates are arranged at two ends of the wheel hub shaft, the connecting part is a semicircular ring, and the connecting part is connected with the flange plate outside the wheel hub shaft through a bolt.
Furthermore, the telescopic rod of the fourth servo actuator is connected with the second force arm through a bearing, and the cylinder body of the fourth servo actuator is hinged to the rack.
The invention has the beneficial effects that: a knuckle endurance test bed comprises a frame, a steering arm, an axle body and a hub ring, wherein the axle body and the hub ring are connected with a steering knuckle ear through a main pin, one end of the steering arm is connected with a steering arm connecting hole of the steering knuckle, the other end of the steering arm is connected with a first servo actuator used for providing steering load for the steering knuckle, a load force arm is arranged on the side face of the hub ring, a second servo actuator used for providing longitudinal load and a third servo actuator used for providing lateral load are arranged above the load force arm, a fourth servo actuator used for providing steering damping is arranged on the side face of the load force arm, the axle body is fixedly connected with the frame actuator through a support, cylinder bodies of the first servo actuator, the second servo actuator, the third servo actuator and the fourth servo actuator are respectively hinged with an axle seat, and the axle seat is fixedly connected with the frame, the invention has scientific structure, can carry out dynamic load simulation on the steering knuckle and conveniently carry out durability test.
Drawings
Fig. 1 is a schematic structural view of a knuckle durability test stand according to the present invention.
Fig. 2 is a schematic view of the load arm and hub ring assembly of fig. 1.
Fig. 3 is a schematic view of the structure at another angle of fig. 2.
Fig. 4 is a schematic view showing the installation of a fourth servo actuator of the present invention.
Description of reference numerals:
1-frame 2-steering arm
3-bridge body 31-support
4-hub ring 5-first servo actuator
6-load arm 61-first arm
62-second moment arm 7-second servo actuator
8-third servo actuator 9-fourth servo actuator.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples, which are not intended to limit the scope of the invention.
As shown in fig. 1 to 4, the knuckle endurance test bed of this embodiment includes frame 1, and frame 1 is the bearing foundation of whole test bed, including the test bed of horizontal direction, the support of vertical direction, and the test bed all is provided with the flat board of T type groove on the support altogether to fixed other devices that can be convenient. The frame 1 also comprises fixing devices for hydraulic, electric and other systems.
A hub ring 4 is arranged on a test bed of the rack 1, the hub ring 4 is used for simulating an automobile hub in an actual working condition, a rod part of a steering knuckle is inserted into the hub ring 4 during a test, meanwhile, according to the actual working condition, an axle body 3 is used for simulating an axle body of an automobile, a steering arm 2 is used for simulating a steering system of the automobile, then a certain load is applied to the hub ring 4 and the steering arm 2, the running state of the automobile is simulated, and therefore the durability test of the steering knuckle is carried out. The bridge body 3 is fixedly connected with the rack 1 through a support 31, and the bridge body 3 is connected with a main pin hole of a steering knuckle through a main pin.
In view of the difference between the test stand and the actual working condition, the invention adopts the following mode to carry out the test. Specifically, the actual working condition of the automobile steering knuckle is simulated through a vehicle steering loading mechanism, a turning simulation loading mechanism, a load simulation loading mechanism and the like.
The vehicle steering loading mechanism is realized through a steering arm 2, one end of the steering arm 2 is connected with a steering arm connecting hole of a steering knuckle, and the other end of the steering arm 2 is connected with a first servo actuator 5 for providing steering load for the steering knuckle. The turning simulation loading mechanism is mainly realized by a third servo actuator 8 and a fourth servo actuator 9, in order to apply load to the hub ring 4, a load force arm 6 is arranged on the side surface of the hub ring 4, the third servo actuator 8 for providing lateral load is arranged above the load force arm 6, and the fourth servo actuator 9 for simulating the resistance of the tire on the ground so as to provide steering damping is arranged on the side surface of the load force arm 6. The load simulation loading mechanism is mainly realized through a second servo actuator 7, and the second servo actuator 7 is arranged above the side of the load force arm 6 and above the hub ring 4.
The cylinder bodies of the first servo actuator 5, the second servo actuator 7, the third servo actuator 8 and the fourth servo actuator 9 are hinged to a shaft seat respectively, and the shaft seat is fixedly connected with the rack 1.
As shown in fig. 4, the load arm 6 includes a connecting portion, a first arm 61, and a second arm 62, the connecting portion is connected to an axial side surface of the hub wheel 4 by a bolt, the first arm 61 extends upward from an upper end of the connecting portion and is connected to the third servo actuator 8, and the second arm 62 extends horizontally from a side surface of the connecting portion and is connected to the fourth servo actuator 9.
As shown in fig. 2, the second servo actuator 7 is located above the hub wheel 4, and the lower end of the second servo actuator 7 is connected to the hub wheel 4 by a bolt passing through the hub wheel 4 and the load arm 6.
The telescopic rod of the first servo actuator 5 is connected with the steering arm 2 through a bearing, the cylinder body of the first servo actuator 5 is hinged to the frame 1, the telescopic rod of the second servo actuator 7 is connected with the hub ring 4 through a bearing and a bolt, the cylinder body of the second servo actuator 7 is hinged to the frame 1, the telescopic rod of the third servo actuator 8 is connected with the first force arm 61 through a bearing, and the cylinder body of the third servo actuator 8 is hinged to the frame 1.
The wheel hub ring 4 comprises a wheel hub shaft sleeved outside the rod part of the steering knuckle, flanges are arranged at two ends of the wheel hub shaft, the connecting part is a semicircular ring, and the connecting part is connected with the flange on the outer side of the wheel hub shaft through a bolt.
The telescopic rod of the fourth servo actuator 9 is connected with the second force arm 62 through a bearing, and the cylinder body of the fourth servo actuator 9 is hinged with the rack 1. The fourth servo actuator 9 may also be a rod-shaped damping rod, which is not actively driven by a hydraulic cylinder, but passively provides a resistance in the opposite direction according to the swinging direction of the second force arm 62, so as to simulate the lateral resistance on the ground when the tire is turned.
In fig. 1, a device for lifting and transporting a steering knuckle is arranged above the frame 1, so that the operation is convenient.
In the invention, the servo actuators adopt electro-hydraulic servo, a servo closed loop system is composed of a servo oil cylinder, a servo valve, a servo controller, a displacement sensor, a force sensor and the like, can perform force closed loop or displacement closed loop, can provide test load, frequency and phase specified by test standards, has the function of preventing mutual interference among the actuators, and has durability and stability of long-time work.
The test data are synchronously measured in the test process, and the tension pressure sensor, the temperature sensor, the displacement sensor and the corresponding acquisition system are used, so that the control system is subjected to feedback adjustment. Specifically, after the test is started, the equipment is initialized, a motor is started, a proportional overflow valve and an electro-hydraulic servo valve are controlled, the servo actuator is driven to load, a sensor signal is collected, data are stored, and the test is finished after the test frequency requirement is met.
As shown in figures 1 and 4, each device such as the servo actuator can be conveniently adjusted in position and height, and therefore, the servo actuator can be used for steering knuckles of different models and even used for durability tests of other parts. For an automobile steering knuckle, the automobile steering knuckle has multiple working conditions, and besides a normal working condition, three typical dangerous working conditions exist: a) the working condition of crossing an uneven road surface, b) the working condition of emergency braking, c) the working condition of minimum steering radius and wheel sliding.
And for the working condition that a) crosses the uneven road surface, which is equivalent to the working condition that the wheel is subjected to impact load, the dynamic load coefficient is maximum, and at the moment, the steering knuckle is only subjected to the action of normal reaction force. The knuckle is subjected to an impulsive vertical load in this condition.
For the b) emergency braking working condition, under the working condition, the large journal of the steering knuckle is subjected to normal reaction and tangential reaction transmitted by the tire through the bearing, and the steering knuckle is not subjected to torque action during braking because the wheel hub is arranged on the bearing. During emergency braking of the vehicle, the steering knuckle is subjected to loads in both directions, a load in the vertical direction due to the weight redistribution of the front axle caused by braking, and a longitudinal load in the horizontal direction due to the inertia force of the vehicle motion.
For the c) minimum steering radius and wheel sliding working condition, when the vehicle makes a sharp turn and the wheels slide, the left and right front wheels of the automobile respectively receive lateral forces with different magnitudes and the same direction, and because the lateral forces are the forces acting on the wheels, when the lateral forces are equivalent to the steering knuckle journals, the moment generated by the lateral forces must be added, so a moment is added after the lateral forces are translated to the steering knuckles. Taking the car turning to the right as an example, when the car turns to the right, the bending moment borne by the right steering knuckle is much larger than that of the left steering knuckle.
The invention simulates the forces applied to the steering knuckle in different directions under various working conditions through the mechanisms and the combination thereof, sets the loading force, the loading frequency and the loading waveform in the X-Y-Z directions through controlling the servo actuator, thereby simulating the actual stress of the automobile steering knuckle on the whole automobile to carry out a composite fatigue life test, and having the characteristics of reasonable structure, convenient operation, stable and reliable system and the like.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. Knuckle endurance test platform, its characterized in that: including frame (1), steering arm (2), be used for axle body (3), hub circle (4) of being connected through swizzle and knuckle ear, the one end of steering arm (2) is connected with the steering arm connecting hole of knuckle, the other end of steering arm (2) is connected with first servo actuator (5) that are used for providing steering load to the knuckle, the side of hub circle (4) is provided with load arm of force (6), the top of load arm of force (6) is provided with second servo actuator (7) that are used for providing longitudinal load, is used for providing third servo actuator (8) of side direction load, the side of load arm of force (6) is provided with fourth servo actuator (9) that are used for providing steering damping, axle body (3) through support (31) with frame (1) fixed connection, first servo actuator (5) the, The cylinder bodies of the second servo actuator (7), the third servo actuator (8) and the fourth servo actuator (9) are hinged to a shaft seat respectively, and the shaft seat is fixedly connected with the rack (1).
2. The knuckle durability test stand according to claim 1, characterized in that: the load force arm (6) comprises a connecting part, a first force arm (61) and a second force arm (62), the connecting part is connected with the axial side face of the hub ring (4) through a bolt, the first force arm (61) extends upwards from the upper end of the connecting part and then is connected with the third servo actuator (8), and the second force arm (62) extends horizontally from the side face of the connecting part and then is connected with the fourth servo actuator (9).
3. The knuckle durability test stand according to claim 1, characterized in that: the second servo actuator (7) is located above the hub ring (4), and the lower end of the second servo actuator (7) is connected with the hub ring (4) through a bolt.
4. The knuckle three channel hydraulic servo endurance test stand of claim 2, further comprising: the telescopic link of first servo actuator (5) pass through the bearing with turn to arm (2) and be connected, the cylinder body of first servo actuator (5) with frame (1) is articulated, the telescopic link of second servo actuator (7) pass through bearing, bolt with hub ring (4) are connected, the cylinder body of second servo actuator (7) with frame (1) is articulated, the telescopic link of third servo actuator (8) passes through the bearing and is connected with first force arm (61), the cylinder body of third servo actuator (8) with frame (1) is articulated.
5. The knuckle durability test stand according to claim 2, characterized in that: the wheel hub ring (4) comprises a wheel hub shaft sleeved outside the rod part of the steering knuckle, flanges are arranged at two ends of the wheel hub shaft, the connecting part is a semicircular ring, and the connecting part is connected with the flange on the outer side of the wheel hub shaft through a bolt.
6. The knuckle durability test stand according to claim 1, characterized in that: the telescopic rod of the fourth servo actuator (9) is connected with the second force arm (62) through a bearing, and the cylinder body of the fourth servo actuator (9) is hinged to the rack (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011000732.2A CN112098076A (en) | 2020-09-22 | 2020-09-22 | Knuckle endurance test platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011000732.2A CN112098076A (en) | 2020-09-22 | 2020-09-22 | Knuckle endurance test platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112098076A true CN112098076A (en) | 2020-12-18 |
Family
ID=73754751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011000732.2A Pending CN112098076A (en) | 2020-09-22 | 2020-09-22 | Knuckle endurance test platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112098076A (en) |
-
2020
- 2020-09-22 CN CN202011000732.2A patent/CN112098076A/en active Pending
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