CN109297724B - Composite fatigue testing device and method for V-shaped thrust rod assembly - Google Patents
Composite fatigue testing device and method for V-shaped thrust rod assembly Download PDFInfo
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- CN109297724B CN109297724B CN201811171382.9A CN201811171382A CN109297724B CN 109297724 B CN109297724 B CN 109297724B CN 201811171382 A CN201811171382 A CN 201811171382A CN 109297724 B CN109297724 B CN 109297724B
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- 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
Abstract
The invention discloses a composite fatigue testing device and method for a V-shaped thrust rod assembly. The composite fatigue testing device comprises a testing platform, a base, a small-end ball mounting inclined block, a V-end ball fixing frame, a transverse loading ball joint, a longitudinal loading ball joint, a transverse transition disc, a longitudinal transition disc and a guide tripod. A small-end ball head mounting inclined block is connected to the upper surface of the base and is connected with a small-end ball head core shaft; the V-end ball head fixing frame is connected with the V-end ball hinge core shaft; the guide tripod is arranged on the base. The V-shaped thrust rod assembly is subjected to longitudinal and transverse combined loading through the fixing frame, so that arc line or rotary motion of the V-shaped thrust rod assembly is realized, and the real running condition of the V-shaped thrust rod assembly is simulated. The test method provided by the invention simulates the actual loading condition and the stress operation condition of the V-shaped thrust rod assembly on the frame, and the test device is simple and effective, reliable in installation and good in repeatability.
Description
Technical Field
The invention relates to the technical field of automobile thrust rods, in particular to a composite fatigue testing device and method for a V-shaped thrust rod assembly.
Background
With the wide application of various types of thrust rods to load-carrying commercial vehicles and passenger cars, people are more and more deeply researching the thrust rods, the thrust rods are used as key connecting parts of axles and frames and mainly play roles in force transmission, limiting and guiding, and rubber ball joint joints on the thrust rods also play roles in buffering vibration and impact and are one of key parts of a multi-axle automobile balance suspension, so that the strength of the thrust rods has a vital influence on the safety and stability of the whole automobile in the driving process.
The thrust rods are distinguished according to the shapes of the thrust rods and mainly divided into I-shaped straight rods and V-shaped rods; the straight rod has simple structure, wide application and mature technical research; the V-shaped thrust rod assembly (hereinafter referred to as a V-shaped rod) mainly comprises a V-shaped ball head, a V-end spherical hinge, two lateral sleeves, a small-end ball head and a small-end spherical hinge, and is complex in structure. At present, the research on the V-shaped rod mainly focuses on structural analysis, static and dynamic analysis and fatigue test analysis of a spherical hinge, and the fatigue test on the V-shaped rod system is limited by test equipment and test conditions and only stays on a single-axis test at present, and the fatigue test research on a composite working condition is not carried out. However, in the actual loading operation of the V-bar, the V-bar bears the longitudinal load (driving, braking) and the transverse load (turning, cross slope), not only needs to transmit the driving force, the braking force, the centrifugal force and the corresponding moment, but also needs to transmit the force in the vertical direction caused by the impact of part of the road surface, and under the long-term superposition effect of the force and the moment, the phenomenon of fracture or failure often occurs, so that the research on the fatigue problem of the V-bar is of practical significance. Meanwhile, a single-axis test is changed into a multi-axis test, so that the service life of the bench test of the V-shaped thrust rod assembly can reflect the actual loading service life of the V-shaped thrust rod assembly.
Among the prior art, utility model with publication number CN 201107184Y discloses a car V type distance rod assembly analogue test device, and it includes two big triangular supports and two little triangular supports, has perpendicular guiding mechanism on two big triangular supports, has side direction guiding mechanism on two little triangular supports, connect through V type distance rod assembly between perpendicular guiding mechanism and the side direction guiding mechanism, what this scheme recorded is vertical + side direction power, and the stress point is that single-end and double-end load respectively, and operating mode simple structure requires also not high to test equipment. The utility model discloses a utility model is CN 201311358Y's utility model discloses a V type distance rod transverse test frock, the support is fixed on the workstation, the fixing base passes through the bolted connection mode to be fixed on the support, the fixing base is monolithic structure, V type distance rod both ends are bolted connection with the fixing base, V type end and transverse loading frock bolted connection, transverse loading frock links to each other with linear actuator, the device has only simulated the transverse stress condition of V type distance rod in the vehicle, can not realize two-way loading simultaneously.
Disclosure of Invention
The invention provides a composite fatigue testing device and method for a V-shaped thrust rod assembly, which can simulate the working condition that a V-shaped thrust rod simultaneously bears longitudinal load and transverse load in the actual operation process and detect the composite fatigue life of the V-shaped thrust rod in the longitudinal direction, the transverse direction and the longitudinal and transverse directions.
The technical scheme of the invention is as follows: a composite fatigue testing device of a V-shaped thrust rod assembly comprises a V-end spherical hinge mandrel and two small-end ball head mandrels, and the composite fatigue testing device comprises a testing platform, a base, a small-end ball head mounting inclined block, a V-end ball head fixing frame, a transverse loading ball head joint, a longitudinal loading ball head joint, a transverse transition disc, a longitudinal transition disc and a guide triangular frame; the base is arranged on the test platform, the left part and the right part of the upper surface of the base are respectively connected with a small-end ball head mounting inclined block, and the two small-end ball head mounting inclined blocks are respectively connected with two small-end ball head core shafts of the V-shaped thrust rod assembly; the V-end ball head fixing frame is positioned above the base and connected with a V-end ball hinge core shaft of the V-shaped thrust rod assembly; the left end of the V-end ball head fixing frame is fixedly connected with a transverse loading ball head joint, and a transverse transition disc is connected with the transverse loading ball head joint; the upper end of the V-end ball head fixing frame is fixedly connected with a longitudinal loading ball head joint, and a longitudinal transition disc is connected with the longitudinal loading ball head joint; the guide tripod is installed on the base and symmetrically arranged on the front side and the rear side of the V-end ball head fixing frame.
The front side and the rear side of the V-end ball head fixing frame are respectively provided with a first mirror friction steel plate, and the upper part of the guide tripod is fixedly connected with a second mirror friction steel plate on the side surface opposite to the V-end ball head fixing frame; the first mirror friction steel plate and the second mirror friction steel plate which are positioned on the same side are in contact with each other.
The device also comprises a limit screw, a locking nut and a limit cross rod; the front side and the rear side of the V-end ball head fixing frame are respectively provided with two guide tripods; the upper portion of the guide tripod is provided with a first transverse through hole, the limiting cross rod is inserted into the first through holes in the upper portions of the two guide tripods on the same side, two ends of the limiting cross rod are exposed outside, two ends of the limiting cross rod are provided with second through holes through which the limiting screw rods can penetrate, the left ends of the two limiting cross rods are connected with the locking nuts through the limiting screw rods, and the right ends of the two limiting cross rods are also connected with the locking nuts through the limiting screw rods.
The left side and the right side of base all are equipped with and are used for carrying on spacing adjustable fagging to the base, are equipped with a plurality of T type grooves above the test platform, and adjustable fagging is installed in the T type groove above the test platform.
The transverse transition disc is connected with a transverse electro-hydraulic servo coordination loading test system; the longitudinal transition disc is connected with a longitudinal electro-hydraulic servo coordination loading test system.
The radial spherical plain bearing is assembled in the transverse loading spherical joint, and the radial spherical plain bearing is assembled in the longitudinal loading spherical joint.
A composite fatigue test method of a V-shaped thrust rod assembly is characterized in that the V-shaped thrust rod assembly is mounted on a test platform in a way of simulating the real-vehicle mounting mode of the V-shaped thrust rod assembly, two small-end ball head mandrels of the V-shaped thrust rod assembly are fixed on the test platform, and a V-end ball hinge mandrel is connected with a fixing frame; longitudinal load and transverse load are applied to the V-shaped thrust rod assembly through the fixing frame, so that longitudinal reciprocating motion and transverse reciprocating motion of the V-shaped thrust rod assembly are realized; the V-shaped thrust rod assembly is subjected to longitudinal and transverse combined loading through the fixing frame, so that arc line or rotary motion of the V-shaped thrust rod assembly is realized, and the real running condition of the V-shaped thrust rod assembly is simulated.
Testing by adopting the composite fatigue testing device of the V-shaped thrust rod assembly; the composite fatigue testing method of the V-shaped thrust rod assembly comprises the following steps:
s1: installing a base: installing a base on a test platform, installing adjustable supporting plates on the left side and the right side of the base, and limiting and fixing the base;
s2: installing a small-end ball head installation inclined block: according to a preset design position, a small-end ball head mounting inclined block is respectively mounted at the left part and the right part of the upper surface of the base through bolts;
s3: installing a V-shaped thrust rod assembly: two small-end ball head mandrels of the V-shaped thrust rod assembly are respectively connected with two small-end ball head mounting inclined blocks through bolts in a locking manner;
s4: installing a V-end ball head fixing frame: fixedly locking and connecting the V-end ball head fixing frame with a V-end ball hinge core shaft of the V-shaped thrust rod assembly;
s5: installing a mirror friction steel plate I: a mirror friction steel plate I is respectively arranged on the front side and the rear side of the V-end ball head fixing frame;
s6: installing a guide tripod: four guiding tripods are symmetrically arranged on the front side and the rear side of the V-end ball head fixing frame, and the guiding tripods are locked on the base: the front side and the rear side of the V-end ball head fixing frame are respectively provided with two guide triangular frames; before the guide tripod is installed, the upper parts of the two guide tripods on the front side are fixedly connected with a second mirror friction steel plate, the upper parts of the two guide tripods on the rear side are also fixedly connected with a second mirror friction steel plate, and when the guide tripod is installed, the first mirror friction steel plate and the second mirror friction steel plate which are positioned on the same side are in contact;
s7: locking the guide tripod: inserting a limiting cross rod into a through hole I in the upper parts of two guide tripods on the front side of a V-end ball head fixing frame, inserting a limiting cross rod into a through hole I in the upper parts of two guide tripods on the rear side of the V-end ball head fixing frame, and respectively locking the right ends and the left ends of the two limiting cross rods by using two limiting screw rods and locking nuts;
s8: installing a loading system: a transverse loading ball joint is fixedly connected to the left end of the V-end ball fixing frame, and a transverse transition disc is connected with the transverse loading ball joint; then connecting the transverse transition disc with a transverse electro-hydraulic servo coordination loading test system;
a longitudinal loading ball joint is fixedly connected to the upper end of the V-end ball fixing frame, and a longitudinal transition disc is connected with the longitudinal loading ball joint; then connecting the longitudinal transition disc with a longitudinal electro-hydraulic servo coordination loading test system;
s9: and (3) loading test: starting a longitudinal electro-hydraulic servo coordination loading test system and a transverse electro-hydraulic servo coordination loading test system, and applying longitudinal load and transverse load to the V-shaped thrust rod assembly through the V-end ball head fixing frame to enable the V-shaped thrust rod assembly to perform longitudinal reciprocating motion and transverse reciprocating motion; by simultaneously carrying out longitudinal and transverse combined loading, arc line or rotary motion of the V-shaped thrust rod assembly is realized, and the real running condition of the V-shaped thrust rod assembly is simulated;
s10: and recording test data to complete the composite fatigue test of the V-shaped thrust rod assembly.
The longitudinal reciprocating motion of the V-shaped thrust rod assembly is implemented and transmitted by connecting a longitudinal electro-hydraulic servo coordinated loading test system with a longitudinal loading ball joint; the transverse reciprocating motion is implemented and transmitted by the connection of a transverse electro-hydraulic servo coordinated loading test system and a transverse loading ball joint; longitudinal and transverse forces are applied to the V-end ball head fixing frame, so that arc line or rotation movement of the V-shaped thrust rod assembly is realized; the loads applied longitudinally and transversely are changed in different steps by different longitudinal and transverse applying frequencies, so that various road conditions of the V-shaped thrust rod assembly are simulated really.
Carrying out cyclic test of simultaneous input of modules with different loads and frequencies by using test loading systems in the longitudinal direction and the transverse direction, and simulating the stress working condition of the V-shaped thrust rod assembly in the actual road condition;
when the V-shaped thrust rod assembly is installed on a composite fatigue test device of the V-shaped thrust rod assembly, the installation mode and the size are consistent with those of an actual installation mode.
The invention is used for carrying out longitudinal and transverse fatigue tests on the V-shaped thrust rod assembly. The test method provided by the invention simulates the actual loading condition and the stress operation condition of the V-shaped thrust rod assembly on the frame, and the test device is simple and effective, reliable in installation and good in repeatability. The beneficial effects of the invention are as follows: firstly, designing a set of complete test device capable of simulating a longitudinal and transverse fatigue test of a V-shaped thrust rod assembly; secondly, the actual installation mode of the test device and the V-shaped thrust rod assembly is the same as the motion process of loaded deformation, so that the authenticity and the reliability of a fatigue test are improved; thirdly, the device can simultaneously realize the longitudinal and transverse combined loading of the V-shaped thrust rod, can carry out longitudinal or transverse fatigue tests on the V-shaped thrust rod, and can detect the longitudinal, transverse and longitudinal and transverse combined fatigue life of the V-shaped thrust rod; fourthly, the test device can move along with the deformation reciprocating change of the V-shaped thrust rod in the loading process in the test process, and the effective and efficient fatigue test is carried out on the V-shaped thrust rod; fifthly, the test loading systems in the longitudinal direction and the transverse direction can realize the cycle test of simultaneous input of modules with different loads and frequencies, can simulate the stress working condition of the V-shaped thrust rod in the actual road condition, and improve the authenticity and the effectiveness of the test.
Drawings
FIG. 1 is a schematic front view of a composite fatigue testing device of a V-shaped thrust rod assembly in the present invention;
FIG. 2 is a schematic perspective view of a composite fatigue testing device of a V-shaped thrust rod assembly according to the present invention;
in the figure: 1. a base; 2. the small end ball head is provided with an inclined block; 3. a V-shaped thrust rod assembly; 4. a V-end ball head fixing frame; 5.1, transversely loading the ball joint; 5.2, longitudinally loading the ball joint; 6.1, a transverse transition disc; 6.2, a longitudinal transition disc; 7. a guide tripod; 8. mirror surface friction steel plate I; 9. a mirror surface friction steel plate II; 10. a limit screw; 11. an adjustable supporting plate; 12. a test platform; 13. and a limiting cross rod.
Detailed Description
The V-shaped thrust rod assembly mainly comprises a V-shaped ball head, a V-shaped end ball joint (the V-shaped end ball joint comprises a V-shaped end ball joint mandrel), two lateral sleeves, a small end ball head (the small end ball head comprises a small end ball joint mandrel) and a small end ball joint, is a key connecting part of an axle and a frame, mainly plays the roles of force transmission, spacing and guiding, and meanwhile, a rubber ball joint on the thrust rod also plays the roles of vibration buffering and impact buffering and is mainly applied to single-axle or double-rear-axle heavy-duty automobiles with non-independent suspensions.
Referring to fig. 1 and 2, a composite fatigue testing device for a V-shaped thrust rod assembly includes a base 1, a small end ball mounting inclined block 2, a V end ball fixing frame 4, a transverse loading ball joint 5.1 (with an alignment center joint bearing installed therein), a longitudinal loading ball joint 5.2 (with an alignment center joint bearing installed therein), a transverse transition disc 6.1, a longitudinal transition disc 6.2, a guide tripod 7, a first mirror friction steel plate (fixedly connected with the V end ball fixing frame) 8, a second mirror friction steel plate (fixedly connected with the guide tripod) 9, a limit screw 10, an adjustable support plate 11, a test platform 12, and a limit cross rod 13. The equipment connected with the transverse transition disk 6.1 is a transverse electro-hydraulic servo coordination loading test system (the load is 0-200 kN, and the stroke is +/-200 mm); the equipment connected with the longitudinal transition disk 6.2 is a longitudinal electro-hydraulic servo coordination loading test system (load is 0-200 kN, and stroke is +/-100 mm). During testing, the V-shaped thrust rod assembly 3 is installed on the composite fatigue testing device. The base is arranged on the test platform, the left part and the right part of the upper surface of the base are respectively connected with a small-end ball head mounting inclined block, and the two small-end ball head mounting inclined blocks are respectively connected with two small-end ball head core shafts of the V-shaped thrust rod assembly; the V-end ball head fixing frame is positioned above the base and connected with a V-end ball hinge core shaft of the V-shaped thrust rod assembly.
Referring to fig. 1 and fig. 2, as a preferred embodiment, the test is performed by the following steps:
the base 1 is fixedly connected with a left small-end ball head mounting inclined block 2 and a right small-end ball head mounting inclined block 2 through bolts respectively, the two small-end ball head mounting inclined blocks 2 are locked and connected with two small-end ball head mandrels of a V-shaped thrust rod assembly 3 through bolts, and a torque wrench is used for applying a specified torque; the angle of the small-end ball head mounting inclined block 2 is determined according to the included angle of the sleeves on the two sides of the V-shaped thrust rod assembly 3.
The V-end ball head fixing frame 4 is fixedly locked and connected with a mandrel of a V-end ball hinge of the V-shaped thrust rod assembly 3, and a torque wrench is used for applying a specified torque.
As shown in FIG. 1: the left end of the V-end ball head fixing frame 4 is fixedly connected with a transverse loading ball head joint 5.1 through four bolts; the transverse loading ball joint 5.1 is connected with a transverse transition disc 6.1; the transverse transition disc 6.1 is connected with a transverse electro-hydraulic servo coordination loading test system (the tail part of the transverse transition disc is provided with a ball joint), so that transverse loading force transmission is realized.
As shown in FIG. 1: the upper end of the V-end ball head fixing frame 4 is fixedly connected with a longitudinal loading ball head joint 5.2 through four bolts; the longitudinal loading ball joint 5.2 is connected with the longitudinal transition disc 6.2; the longitudinal transition disc 6.2 is connected with a longitudinal electro-hydraulic servo coordination loading test system (the tail part of the test system is provided with a ball joint), so that the transmission of longitudinal loading force is realized.
The guide triangular brackets 7 are symmetrically positioned at two sides of the V-end ball head fixing frame 4 and locked on the base 1; meanwhile, two mirror surface friction steel plates I8 are arranged on the front side and the rear side of the V-end ball head fixing frame 4; a second mirror friction steel plate 9 is respectively arranged on the upper part of the guide tripod 7 and the surface opposite to the V-end ball head fixing frame 4; thereby playing the guiding and limiting role during the composite fatigue test of the V-shaped thrust rod assembly rack.
The front side and the rear side of the V-end ball head fixing frame are respectively provided with two guide tripods; the upper portion of the guide tripod is provided with a first transverse through hole, the limiting cross rod is inserted into the first through holes in the upper portions of the two guide tripods on the same side, two ends of the limiting cross rod are exposed outside, two ends of the limiting cross rod are provided with second through holes through which the limiting screw rods can penetrate, the left ends of the two limiting cross rods are connected with the locking nuts through the limiting screw rods, and the right ends of the two limiting cross rods are also connected with the locking nuts through the limiting screw rods. The guide tripod 7 is limited and locked by a limit screw 10, a locking nut and a limit cross rod 13, so that the V-shaped thrust rod assembly 3 and the middle V-end ball head fixing frame 4 move on the same plane; the adjustable supporting plates 11 are respectively arranged on the left side and the right side of the base 1, and the base 1 is pressed to be limited by utilizing the T-shaped groove on the test platform 12, so that the sliding of the test device caused by overlarge transverse load is avoided.
A composite fatigue test method of a V-shaped thrust rod assembly is characterized in that the V-shaped thrust rod assembly is mounted on a test platform in a way of simulating the real-vehicle mounting mode of the V-shaped thrust rod assembly, two small-end ball head mandrels of the V-shaped thrust rod assembly are fixed on the test platform, and a V-end ball hinge mandrel is connected with a fixing frame; longitudinal load and transverse load are applied to the V-shaped thrust rod assembly through the fixing frame, so that longitudinal reciprocating motion and transverse reciprocating motion of the V-shaped thrust rod assembly are realized; the V-shaped thrust rod assembly is subjected to longitudinal and transverse combined loading through the fixing frame, so that arc line or rotary motion of the V-shaped thrust rod assembly is realized, and the real running condition of the V-shaped thrust rod assembly is simulated. The composite fatigue testing device of the V-shaped thrust rod assembly can be used for testing, during testing, the device is firstly installed according to the installation method, then longitudinal and transverse composite loading is carried out, various test data are recorded, and improvement is facilitated.
The composite fatigue testing method of the V-shaped thrust rod assembly can comprise the following steps:
s1: installing a base: installing a base on a test platform, installing adjustable supporting plates on the left side and the right side of the base, and limiting and fixing the base;
s2: installing a small-end ball head installation inclined block: according to a preset design position, a small-end ball head mounting inclined block is respectively mounted at the left part and the right part of the upper surface of the base through bolts;
s3: installing a V-shaped thrust rod assembly: two small-end ball head mandrels of the V-shaped thrust rod assembly are respectively connected with two small-end ball head mounting inclined blocks through bolts in a locking manner;
s4: installing a V-end ball head fixing frame: fixedly locking and connecting the V-end ball head fixing frame with a V-end ball hinge core shaft of the V-shaped thrust rod assembly;
s5: installing a mirror friction steel plate I: a mirror friction steel plate I is respectively arranged on the front side and the rear side of the V-end ball head fixing frame;
s6: installing a guide tripod: four guiding tripods are symmetrically arranged on the front side and the rear side of the V-end ball head fixing frame, and the guiding tripods are locked on the base: the front side and the rear side of the V-end ball head fixing frame are respectively provided with two guide triangular frames; before the guide tripod is installed, the upper parts of the two guide tripods on the front side are fixedly connected with a second mirror friction steel plate, the upper parts of the two guide tripods on the rear side are also fixedly connected with a second mirror friction steel plate, and when the guide tripod is installed, the first mirror friction steel plate and the second mirror friction steel plate which are positioned on the same side are in contact;
s7: locking the guide tripod: inserting a limiting cross rod into a through hole I in the upper parts of two guide tripods on the front side of a V-end ball head fixing frame, inserting a limiting cross rod into a through hole I in the upper parts of two guide tripods on the rear side of the V-end ball head fixing frame, and respectively locking the right ends and the left ends of the two limiting cross rods by using two limiting screw rods and locking nuts;
s8: installing a loading system: a transverse loading ball joint is fixedly connected to the left end of the V-end ball fixing frame, and a transverse transition disc is connected with the transverse loading ball joint; then connecting the transverse transition disc with a transverse electro-hydraulic servo coordination loading test system;
a longitudinal loading ball joint is fixedly connected to the upper end of the V-end ball fixing frame, and a longitudinal transition disc is connected with the longitudinal loading ball joint; then connecting the longitudinal transition disc with a longitudinal electro-hydraulic servo coordination loading test system;
s9: and (3) loading test: starting a longitudinal electro-hydraulic servo coordination loading test system and a transverse electro-hydraulic servo coordination loading test system, and applying longitudinal load and transverse load to the V-shaped thrust rod assembly through the V-end ball head fixing frame to enable the V-shaped thrust rod assembly to perform longitudinal reciprocating motion and transverse reciprocating motion; by simultaneously carrying out longitudinal and transverse combined loading, arc line or rotary motion of the V-shaped thrust rod assembly is realized, and the real running condition of the V-shaped thrust rod assembly is simulated;
s10: and recording test data to complete the composite fatigue test of the V-shaped thrust rod assembly.
The invention can carry out the longitudinal and transverse composite loading fatigue test of the V-shaped thrust rod assembly, and the longitudinal reciprocating motion of the V rod is implemented and transmitted by connecting a longitudinal electro-hydraulic servo coordination loading test system with a longitudinal loading ball joint 5.2; the transverse reciprocating motion is implemented and transmitted by connecting a transverse electro-hydraulic servo coordinated loading test system with a transverse loading ball joint 5.1; longitudinal and transverse forces are applied to the V-end ball head mount 4 to achieve an arc or rotational motion of the V-shaped thrust rod assembly. The longitudinal and transverse applied frequencies are different, the loads applied in the longitudinal and transverse directions are in unequal step change, and various road conditions of the V-shaped thrust rod assembly are simulated really.
The basic characteristics of the V-shaped thrust rod assembly testing device comprise:
1. the actual installation mode of the V-shaped thrust rod is the same as the actual installation mode of the V-shaped thrust rod and the motion process of loaded deformation, the real running condition of the V-shaped thrust rod is simulated, and the authenticity of a fatigue test is higher;
2. the longitudinal and transverse combined loading of the V-shaped thrust rod can be realized, the longitudinal or transverse fatigue test can be carried out on the V-shaped thrust rod, the longitudinal, transverse and longitudinal and transverse combined fatigue life of the V-shaped thrust rod can be detected, and the reliability of the fatigue test of the V-shaped thrust rod loaded in the combined direction is improved;
3. when the V-shaped thrust rod is arranged on a composite fatigue test device of the V-shaped thrust rod assembly, the mounting mode and the size are consistent with those of an actual mounting mode, so that the reliability and the authenticity of fatigue test detection are improved;
4. the whole test device is reasonable in structural design, moves along with the deformation reciprocating change of the V-shaped thrust rod in the loading process, and performs effective and reliable composite direction loading fatigue test on the V-shaped thrust rod;
5. the test loading system in the longitudinal direction and the transverse direction can realize the cycle test of simultaneous input of modules with different loads and frequencies, can simulate the stress working condition of the V-shaped thrust rod in the actual road condition, and improves the authenticity and the effectiveness of the test.
The invention designs a composite fatigue testing device of a V-shaped thrust rod assembly, which can simulate the real-vehicle installation mode of a V rod, reproduce the working condition that the V rod simultaneously bears longitudinal load and transverse load in the actual operation process, and simultaneously apply an electro-hydraulic servo coordination loading test system to apply different loads and frequencies in the longitudinal direction and the transverse direction in the test process, thereby solving the phase and motion coupling problem in the loading process, effectively simulating the loading condition of the V rod in the actual road condition, accumulating enough fatigue life data of the V rod and the damaged and failed position data of the V rod under the composite working condition, and providing reliable test data for quality improvement designers. The test device solves the problems that the service life of the V-shaped thrust rod assembly is checked through the whole vehicle test in the prior art, the cost is high, the test period is long, the device is reliable to install and good in repeatability, and the actual vehicle loading mode of the V-shaped thrust rod assembly is met; the test method is simple and strong in practicability, and can truly simulate the actual operation condition of the test method to obtain the fatigue life and reliability performance data of the test method.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (3)
1. A composite fatigue test method of a V-shaped thrust rod assembly is characterized in that a composite fatigue test device of the V-shaped thrust rod assembly is used for testing, the V-shaped thrust rod assembly comprises a V-end spherical hinge mandrel and two small-end ball head mandrels, and the composite fatigue test device of the V-shaped thrust rod assembly comprises a test platform, a base, a small-end ball head mounting inclined block, a V-end ball head fixing frame, a transverse loading ball head joint, a longitudinal loading ball head joint, a transverse transition disc, a longitudinal transition disc and a guide triangular frame; the base is arranged on the test platform, the left part and the right part of the upper surface of the base are respectively connected with a small-end ball head mounting inclined block, and the two small-end ball head mounting inclined blocks are respectively connected with two small-end ball head core shafts of the V-shaped thrust rod assembly; the V-end ball head fixing frame is positioned above the base and connected with a V-end ball hinge core shaft of the V-shaped thrust rod assembly; the left end of the V-end ball head fixing frame is fixedly connected with a transverse loading ball head joint, and a transverse transition disc is connected with the transverse loading ball head joint; the upper end of the V-end ball head fixing frame is fixedly connected with a longitudinal loading ball head joint, and a longitudinal transition disc is connected with the longitudinal loading ball head joint; the guide tripods are arranged on the base and symmetrically arranged on the front side and the rear side of the V-end ball head fixing frame;
the front side and the rear side of the V-end ball head fixing frame are respectively provided with a first mirror friction steel plate, and the upper part of the guide tripod is fixedly connected with a second mirror friction steel plate on the side surface opposite to the V-end ball head fixing frame; the mirror surface friction steel plate I positioned on the same side is in contact with the mirror surface friction steel plate II;
the device is characterized in that a V-shaped thrust rod assembly is mounted on a test platform in a way of simulating the real-vehicle mounting of the V-shaped thrust rod assembly, two small-end ball head mandrels of the V-shaped thrust rod assembly are fixed on the test platform, and a V-end ball hinge mandrel is connected with a fixing frame; longitudinal load and transverse load are applied to the V-shaped thrust rod assembly through the fixing frame, so that longitudinal reciprocating motion and transverse reciprocating motion of the V-shaped thrust rod assembly are realized; the V-shaped thrust rod assembly is subjected to longitudinal and transverse combined loading through the fixing frame, so that arc line or rotary motion of the V-shaped thrust rod assembly is realized, and the real running condition of the V-shaped thrust rod assembly is simulated;
the composite fatigue testing method of the V-shaped thrust rod assembly comprises the following steps:
s1: installing a base: installing a base on a test platform, installing adjustable supporting plates on the left side and the right side of the base, and limiting and fixing the base;
s2: installing a small-end ball head installation inclined block: according to a preset design position, a small-end ball head mounting inclined block is respectively mounted at the left part and the right part of the upper surface of the base through bolts;
s3: installing a V-shaped thrust rod assembly: two small-end ball head mandrels of the V-shaped thrust rod assembly are respectively connected with two small-end ball head mounting inclined blocks through bolts in a locking manner;
s4: installing a V-end ball head fixing frame: fixedly locking and connecting the V-end ball head fixing frame with a V-end ball hinge core shaft of the V-shaped thrust rod assembly;
s5: installing a mirror friction steel plate I: a mirror friction steel plate I is respectively arranged on the front side and the rear side of the V-end ball head fixing frame;
s6: installing a guide tripod: four guiding tripods are symmetrically arranged on the front side and the rear side of the V-end ball head fixing frame, and the guiding tripods are locked on the base: the front side and the rear side of the V-end ball head fixing frame are respectively provided with two guide triangular frames; before the guide tripod is installed, the upper parts of the two guide tripods on the front side are fixedly connected with a second mirror friction steel plate, the upper parts of the two guide tripods on the rear side are also fixedly connected with a second mirror friction steel plate, and when the guide tripod is installed, the first mirror friction steel plate and the second mirror friction steel plate which are positioned on the same side are in contact;
s7: locking the guide tripod: inserting a limiting cross rod into a through hole I in the upper parts of two guide tripods on the front side of a V-end ball head fixing frame, inserting a limiting cross rod into a through hole I in the upper parts of two guide tripods on the rear side of the V-end ball head fixing frame, and respectively locking the right ends and the left ends of the two limiting cross rods by using two limiting screw rods and locking nuts;
s8: installing a loading system: a transverse loading ball joint is fixedly connected to the left end of the V-end ball fixing frame, and a transverse transition disc is connected with the transverse loading ball joint; then connecting the transverse transition disc with a transverse electro-hydraulic servo coordination loading test system;
a longitudinal loading ball joint is fixedly connected to the upper end of the V-end ball fixing frame, and a longitudinal transition disc is connected with the longitudinal loading ball joint; then connecting the longitudinal transition disc with a longitudinal electro-hydraulic servo coordination loading test system;
s9: and (3) loading test: starting a longitudinal electro-hydraulic servo coordination loading test system and a transverse electro-hydraulic servo coordination loading test system, and applying longitudinal load and transverse load to the V-shaped thrust rod assembly through the V-end ball head fixing frame to enable the V-shaped thrust rod assembly to perform longitudinal reciprocating motion and transverse reciprocating motion; by simultaneously carrying out longitudinal and transverse combined loading, arc line or rotary motion of the V-shaped thrust rod assembly is realized, and the real running condition of the V-shaped thrust rod assembly is simulated;
s10: and recording test data to complete the composite fatigue test of the V-shaped thrust rod assembly.
2. The composite fatigue testing method of the V-shaped thrust rod assembly according to claim 1, wherein the longitudinal reciprocating motion of the V-shaped thrust rod assembly is implemented and transmitted by a longitudinal electro-hydraulic servo coordinated loading test system and a longitudinal loading ball joint; the transverse reciprocating motion is implemented and transmitted by the connection of a transverse electro-hydraulic servo coordinated loading test system and a transverse loading ball joint; longitudinal and transverse forces are applied to the V-end ball head fixing frame, so that arc line or rotation movement of the V-shaped thrust rod assembly is realized; the loads applied longitudinally and transversely are changed in different steps by different longitudinal and transverse applying frequencies, so that various road conditions of the V-shaped thrust rod assembly are simulated really.
3. The composite fatigue testing method of the V-shaped thrust rod assembly according to claim 1, characterized in that a cyclic test of simultaneous input of modules with different loads and frequencies is performed through a test loading system in a longitudinal direction and a transverse direction, so as to simulate the stress condition of the V-shaped thrust rod assembly in an actual road condition;
when the V-shaped thrust rod assembly is installed on a composite fatigue test device of the V-shaped thrust rod assembly, the installation mode and the size are consistent with those of an actual installation mode.
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| CN109668743B (en) * | 2019-02-26 | 2021-01-12 | 北京福田戴姆勒汽车有限公司 | V-shaped thrust rod test bed |
| CN115307938B (en) * | 2022-07-13 | 2023-02-17 | 十堰精密新动力科技股份有限公司 | Fatigue test device for automobile balance suspension assembly |
| CN116105997B (en) * | 2023-04-13 | 2023-06-16 | 烟台辰宇汽车部件有限公司 | Fatigue testing machine for automobile thrust rod assembly |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201107184Y (en) * | 2007-11-15 | 2008-08-27 | 东风汽车有限公司 | Automobile V-shaped thrust rod assembly simulation test device |
| CN201672158U (en) * | 2010-04-02 | 2010-12-15 | 洛阳安德路石化设备有限公司 | Portable large-displacement synchronous movement pipeline bracket |
| CN102323154A (en) * | 2011-05-27 | 2012-01-18 | 中国科学院武汉岩土力学研究所 | High pressure true triaxial test system |
| CN105464673A (en) * | 2015-12-21 | 2016-04-06 | 武汉船用机械有限责任公司 | Early gate apparatus of screw conveyer for shield machine |
| CN206070379U (en) * | 2016-08-30 | 2017-04-05 | 中交武汉港湾工程设计研究院有限公司 | A kind of large-scale structure pose adjusts constructing device |
| CN106769038A (en) * | 2016-12-12 | 2017-05-31 | 长春机械科学研究院有限公司 | One kind combination loading movable joint bearing tester |
| CN107024353A (en) * | 2017-05-11 | 2017-08-08 | 浙江省机电设计研究院有限公司 | A kind of sealed bearings combination property simulation test machine |
| CN107091752A (en) * | 2017-05-23 | 2017-08-25 | 中国第汽车股份有限公司 | Cargo vehicle V-arrangement back reaction rod Bench Test System |
| CN206804451U (en) * | 2017-06-19 | 2017-12-26 | 武汉大学 | One kind can adjust pressing-shearing combined pilot system technology platform |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2370412Y (en) * | 1999-05-26 | 2000-03-22 | 明碁电脑股份有限公司 | Fatigue tester for index rod |
| KR20090030839A (en) * | 2007-09-21 | 2009-03-25 | 주식회사 한국센트랄 | Testing apparatus for torque rod |
-
2018
- 2018-10-09 CN CN201811171382.9A patent/CN109297724B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201107184Y (en) * | 2007-11-15 | 2008-08-27 | 东风汽车有限公司 | Automobile V-shaped thrust rod assembly simulation test device |
| CN201672158U (en) * | 2010-04-02 | 2010-12-15 | 洛阳安德路石化设备有限公司 | Portable large-displacement synchronous movement pipeline bracket |
| CN102323154A (en) * | 2011-05-27 | 2012-01-18 | 中国科学院武汉岩土力学研究所 | High pressure true triaxial test system |
| CN105464673A (en) * | 2015-12-21 | 2016-04-06 | 武汉船用机械有限责任公司 | Early gate apparatus of screw conveyer for shield machine |
| CN206070379U (en) * | 2016-08-30 | 2017-04-05 | 中交武汉港湾工程设计研究院有限公司 | A kind of large-scale structure pose adjusts constructing device |
| CN106769038A (en) * | 2016-12-12 | 2017-05-31 | 长春机械科学研究院有限公司 | One kind combination loading movable joint bearing tester |
| CN107024353A (en) * | 2017-05-11 | 2017-08-08 | 浙江省机电设计研究院有限公司 | A kind of sealed bearings combination property simulation test machine |
| CN107091752A (en) * | 2017-05-23 | 2017-08-25 | 中国第汽车股份有限公司 | Cargo vehicle V-arrangement back reaction rod Bench Test System |
| CN206804451U (en) * | 2017-06-19 | 2017-12-26 | 武汉大学 | One kind can adjust pressing-shearing combined pilot system technology platform |
Non-Patent Citations (2)
| Title |
|---|
| V型推力杆纵向刚度的预测和优化方法;柯俊;《振动、测试与诊断》;20150228;第35卷(第1期);第50-54页 * |
| 商用车推力杆性能优化与疲劳寿命预测研究;冯国雨;《中国博士学位论文全文数据库 工程科技Ⅱ辑》;20170315;论文正文第126-128页，图5.29 * |
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Effective date of registration: 20230109 Address after: No.639 Heilongjiang Road, 58 Liyu Industrial Park, Tianyuan District, Zhuzhou City, Hunan Province, 412007 Patentee after: BOGE RUBBER&PLASTICS ZHUZHOU Co.,Ltd. Address before: 412007 Haitian Road, Tianyuan District, Zhuzhou, Hunan Province, No. 18 Patentee before: ZHUZHOU TIMES NEW MATERIAL TECHNOLOGY Co.,Ltd. |