Six-axis durability test equipment for automobile chassis parts

Abstract

According to the six-axis durability test equipment for the automobile chassis parts, an auxiliary frame and a suspension bearing frame do not need to be disassembled during a durability test, the auxiliary frame and the suspension bearing frame are integrally and synchronously stressed, and the end face of the side, away from the auxiliary frame, of the suspension bearing frame is connected with a test actuation plate; through the back-and-forth linear motion output by the test actuating mechanisms in three directions, the motion load in any direction in the whole space range can be accurately simulated, and the accuracy of the durability test is ensured. In addition, the front edge beam body and the rear edge beam body of the auxiliary frame are fixed through the torsion frame, and the torsion frame is driven by the torsion actuating mechanism to perform front-and-back torsion motion, so that torsion stress borne by the auxiliary frame in the actual working process can be effectively simulated. The six-axis durability test equipment for the automobile chassis parts can test a chassis auxiliary frame and a suspension with more complete structures, and is matched with an actuation structure with comprehensive directions, so that the test condition is closer to the actual working condition of a vehicle chassis.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle detection, in particular to a six-axis durability test device for automobile chassis parts. Background Art

[0002] The vehicle chassis suspension will receive excitation from multiple directions in actual stress, and the bench test should reproduce its stress conditions as much as possible. In addition to the load determination, the design of the bench itself is crucial, and the decoupling of multiple directions, strength, durability and installation issues must all be carefully considered.

[0003] However, most of the current durability test bench designs have more or less differences between the stress conditions of the stress test and the actual working conditions of the chassis. This is especially true because the structure of the chassis itself is complex, consisting of a main frame, a subframe, a suspension, and some other auxiliary support structures. In order to simplify the stress conditions and improve the data accuracy of the specimens, the durability test can often only conduct test analysis on one of the support structures, further exacerbating the difference between the test and the actual working conditions.

[0004] In summary, the existing vehicle chassis durability test equipment design has a technical problem that the test conditions are greatly different from the actual working conditions of the chassis, resulting in poor reference value of the test data. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing vehicle chassis durability test equipment design has a large difference between the test conditions and the actual working conditions of the chassis, resulting in poor referenceability of the test data.

[0006] In order to solve the above problems, the present invention provides a six-axis durability test equipment for automobile chassis parts, comprising: The sub-frame support frame group includes two side fixing frames respectively fixed with two ends of the sub-frame to be tested by pins, the side fixing frames are door-shaped, and the two side frames are respectively used to be connected with two outer pin-connecting platforms at one end of the sub-frame to be tested; The suspension test assembly includes a test actuation plate, the test actuation plate corresponds to the position of the suspension bearing frame connected to one side of the subframe to be tested, and a plate surface on one side of the test actuation plate is used to fit and install with the outer end surface of the suspension bearing frame; the suspension test assembly also includes an X-axis test actuation mechanism, a Y-axis test actuation mechanism and a Z-axis test actuation mechanism, which are pinned to different positions of the test actuation plate and are used to drive the test actuation plate to perform reciprocating test motions from three mutually perpendicular directions; The sub-frame torsion test assembly comprises a torsion frame, which is an I-shaped frame structure. The four end corners of the torsion frame are respectively installed and fixed to the inner sides of the front edge beam body and the rear edge beam body of the sub-frame to be tested, and the middle part of the torsion frame is integrally fixedly connected with pin-connecting platforms on the upper and lower sides along the Z-axis direction; the sub-frame torsion test assembly also includes a torsion actuating mechanism pin-connected to the pin-connecting platforms on both sides, and the torsion frame is driven to perform a torsion action through the reverse motion output of the two torsion actuating mechanisms.

[0007] The present invention provides a novel six-axis durability test equipment, which fixes the two ends of the subframe to be tested by a side fixing frame. When performing the durability test, there is no need to split the subframe and the suspension bearing frame, and the two can be subjected to force synchronously as a whole. A test actuation plate is connected to the end face of the suspension bearing frame away from the subframe, and the test actuation plate is respectively connected to three mutually perpendicular directions of test actuation mechanisms in three directions in a three-dimensional space. The reciprocating linear motion output by the test actuation mechanisms in three directions can accurately simulate the motion load in any direction within the entire space, thereby ensuring the accuracy of the durability test. This method can synchronously test the subframe and the suspension bearing frame. The stress condition at the outer end of the suspension is simulated; the front edge beam and the rear edge beam of the subframe are fixed by the torsion frame, and the torsion actuation mechanism drives the torsion frame to torsion forward and backward, which can effectively simulate the torsional stress that the subframe is borne in the actual working process. This six-axis durability test equipment for automobile chassis parts can test chassis subframes and suspensions with more complete structures, and with the actuation structure with comprehensive directions, the test conditions are closer to the actual working conditions of the vehicle chassis, which effectively solves the technical problem that the test conditions in the existing vehicle chassis durability test equipment design are greatly different from the actual working conditions of the chassis, resulting in poor reference of the test data.

[0008] As a preferred solution, the suspension test assembly also includes a positioning and fine-tuning mechanism, which includes a standard positioning rod, wherein both ends of the standard positioning rod are pinned to the outer connection points of the sub-frame end and the connection points of the suspension bearing frame respectively to replace the suspension connecting rod at the position to be tested, and a vertical connecting rod with adjustable length is pinned to the middle area of ​​the standard positioning rod, and the other end of the vertical connecting rod is connected to the side fixed frame at the corresponding position.

[0009] The design is set to ensure the test effect on the chassis workpiece, especially when it is necessary to conduct a separate test on a certain local bracket position or a higher intensity test action on a local area, the suspension link between the subframe and the suspension bearing frame is replaced by a positioning and fine-tuning mechanism, and the two ends of the standard positioning rod of the positioning and fine-tuning mechanism are respectively connected to a group of relative connection points between the end of the subframe and the suspension bearing frame. The positioning and fine-tuning mechanism is connected to the side fixing frame which has a good fixing effect through a vertical connecting rod, and the vertical connecting rod itself can adjust the length. By adjusting the length of the vertical connecting rod, the initial stress between the subframe and the suspension bearing frame can be adjusted to simulate special working conditions.

[0010] As a preferred solution, the X-axis test actuator mechanism includes two groups of hydraulic actuators that are parallelly distributed up and down along the Z-axis direction. Both groups of hydraulic actuators are parallel to the X-axis, and their respective output ends are used to connect to different positions on both sides of the test actuator plate. This design provides a preferred X-axis test actuator mechanism design, which is provided with driving power for the test by two groups of hydraulic actuators arranged in parallel, and the two are respectively connected to different positions of the test actuator plate along the Z-axis direction. Therefore, the X-axis test actuator mechanism can not only provide a single-direction push and pull of the test actuator plate along the X-axis direction through the synchronous output feed of the two hydraulic actuators, but also output torsional motion to the test actuator plate and the bearing seat connected thereto through the differential output or reverse output of the two hydraulic actuators.

[0011] As a preferred solution, the X-axis test actuation mechanism further includes a linear guide sliding seat pinned to the output ends of the two hydraulic actuators, and the end of the linear guide sliding seat is pinned to the test actuation plate through a linear pull rod. In order to ensure the parallelism of the two hydraulic actuators of the X-axis test actuation mechanism and the linearity of the output motion, a linear guide sliding seat is provided and pinned to the test actuation plate through a linear pull rod.

[0012] As a preferred solution, the Y-axis test actuator mechanism includes a right-angle commutator and a hydraulic actuator arranged along the X-axis direction. The right-angle commutator includes a rotating shaft along the Z-axis direction and a rotating plate rotatably connected to the top of the rotating shaft. The two ends of the rotating plate are connected to the output end of the hydraulic actuator and the test actuator plate through linear pull rods. This design optimizes the design of the Y-axis test actuator mechanism, in which the hydraulic actuator is also arranged along the X-axis direction and converted into a driving force along the Y direction through the right-angle commutator. This design can set the test power structure in one direction to the maximum extent, so as to minimize the space occupied by the equipment. The right-angle commutator consists of two parts: a rotating shaft and a rotating plate. The directions of the connecting rods at both ends of the rotating plate are perpendicular to each other.

[0013] As a preferred solution, the Z-axis test actuation mechanism includes a hydraulic actuator arranged along the Z-axis direction and a gantry connected to the fixed end of the hydraulic actuator, the output end of the hydraulic actuator is connected to a transverse transmission frame arranged along the X-axis direction, and the two ends of the transverse transmission frame are respectively pinned to different positions of the test actuation plate through linear pull rods. This design provides a simple and effective Z-axis test actuation mechanism design, which provides fixation for the hydraulic actuator through the structure of the gantry, and the gantry is suspended above the sub-frame to be tested, wherein the hydraulic actuator is arranged along the Z-axis, and its output end is pinned to the test actuation plate through the transverse transmission frame and the linear pull rod.

[0014] As a preferred solution, the torsion actuation mechanism includes two groups of hydraulic actuators parallelly distributed up and down along the Z-axis direction, and the output ends of the hydraulic actuators are pin-connected to the two pin-connecting platforms of the torsion frame through linear connecting rods. This design optimizes the torsion actuation mechanism. The setting method of the torsion actuation mechanism is similar to the design of the X-axis test actuation mechanism. It is also pin-connected to the two different positions of the torsion frame up and down through two parallel hydraulic actuators, and the two hydraulic actuators output differential or reverse feed, thereby realizing the output torsion drive action of the torsion frame. The design has a simple structure and good controllability.

[0015] As a preferred solution, a base plate assembly is also included, and the base of the side fixing frame is fixed to the top surface of the base plate assembly. This design improves the stability of the device and the fixation of the subframe to be tested. The base plate assembly is set to fix the side fixing frame, the gantry and the fixed ends of each hydraulic actuator. The base plate assembly preferably adopts a design that can be assembled and expanded and has an array of mounting slots, which is convenient for the installation and fixation of each structure and is easy to adjust adaptively.

[0016] As a preferred solution, a plurality of positioning columns are fixedly mounted on the base plate assembly, and each positioning column is respectively positioned and connected with the fixed end of each hydraulic actuator of the X-axis test actuation mechanism, the Y-axis test actuation mechanism, and the torsion actuation mechanism. This design provides a preferred solution for fixing the hydraulic actuator. The positioning column can be relatively conveniently adjusted on the base plate assembly. The positioning column is perpendicular to the base plate surface, and the axial direction of the hydraulic actuator is perpendicular to the positioning column. Depending on the specific structural distribution, multiple hydraulic actuators can also be positioned and installed on the same positioning column.

[0017] As a preferred solution, the guide sliding seat includes two sets of parallel fixed sliding seats and two slide rails that slide with the fixed sliding seats, respectively. The two ends of the two slide rails are respectively hinged with the corresponding hydraulic actuator and the linear connecting rod through the connector, and the fixed sliding seat is positioned and matched with the base plate assembly through the positioning column. This design provides a preferred guide sliding seat design, which is mainly composed of a fixed sliding seat and a slide rail. The fixed sliding seat is preferably positioned and matched with the base plate assembly through the positioning column, and the slide rail is connected to the hydraulic actuator. The design of the two sets of fixed sliding seats and the two slide rails can ensure the straightness of the guide. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structural diagram of a six-axis durability test equipment for automobile chassis parts provided by the present invention; Figure 2 for Figure 1 Schematic diagram of the partial structure on the other side of the six-axis endurance test equipment for automobile chassis parts; Figure 3 for Figure 1 A partial structural diagram of the subframe torsion test assembly location of the six-axis endurance test equipment for automobile chassis parts; Figure 4 for Figure 1 A partial structural diagram of the position of the linear guide slide seat of the six-axis endurance test equipment for automobile chassis parts; Figure 5 for Figure 1 Schematic diagram of the partial structure of the test actuator plate of the six-axis endurance test equipment for automobile chassis parts; Figure 6 for Figure 1 A schematic diagram of the local structure at another angle near the test actuation plate of the six-axis endurance test equipment for automobile chassis parts; Figure 7 for Figure 1 Schematic diagram of the partial structure of the subframe and suspension bearing frame to be tested by the six-axis durability test equipment for automobile chassis parts.

[0019] in, Figure 1-Figure 7 middle: 1. Subframe; 2. Side fixed frame; 3. Test actuator plate; 4. Gantry; 5. Right-angle commutator; 6. Base plate assembly; 7. Linear pull rod; 8. Positioning column; 9. Hydraulic actuator; 10. Linear guide sliding seat; 11. Torsion frame; 12. Pin-jointed table; 13. Vertical connecting rod; 14. Rotating plate; 15. Rotating shaft; 16. Transverse transmission frame; 17. Suspension bearing frame; 18. Fixed slider seat; 19. Slide rail; 20. Standard positioning rod; 21. Suspension connecting rod. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0021] Before explaining the working principle of the present invention in detail, the description of the present invention needs to be further explained: In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a welding connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] refer to Figure 1-Figure 7 The following embodiments are described, Figure 1 The overall structural diagram of a six-axis durability test equipment for automobile chassis parts provided by the present invention; Figure 2 for Figure 1 Schematic diagram of the partial structure on the other side of the six-axis endurance test equipment for automobile chassis parts; Figure 3 for Figure 1 A partial structural diagram of the subframe torsion test assembly location of the six-axis endurance test equipment for automobile chassis parts; Figure 4 for Figure 1 A partial structural diagram of the position of the linear guide slide seat of the six-axis endurance test equipment for automobile chassis parts; Figure 5 for Figure 1 Schematic diagram of the partial structure of the test actuator plate of the six-axis endurance test equipment for automobile chassis parts; Figure 6 for Figure 1 A schematic diagram of the local structure at another angle near the test actuation plate of the six-axis endurance test equipment for automobile chassis parts; Figure 7 for Figure 1 Schematic diagram of the partial structure of the subframe and suspension bearing frame to be tested by the six-axis durability test equipment for automobile chassis parts.

[0024] An embodiment of the present invention provides a six-axis durability test device for automobile chassis parts, comprising: The sub-frame support frame group includes two side fixing frames 2 which are respectively pinned and fixed to the two ends of the sub-frame 1 to be tested, and the side fixing frames 2 are door-shaped, and the two side frames thereof are respectively used to be connected to the two outer pin-connecting platforms 12 at one end of the sub-frame 1 to be tested; The suspension test assembly includes a test actuation plate 3, the test actuation plate 3 corresponds to the position of the suspension bearing frame 17 connected to one side of the subframe 1 to be tested, and a plate surface on one side of the test actuation plate 3 is used to fit and install with the outer end surface of the suspension bearing frame 17; the suspension test assembly also includes an X-axis test actuation mechanism, a Y-axis test actuation mechanism and a Z-axis test actuation mechanism, which are pin-connected to the test actuation plate 3 at different positions, and are used to drive the test actuation plate 3 to perform reciprocating test motions from three mutually perpendicular directions; The sub-frame torsion test assembly comprises a torsion frame 11, which is an I-shaped frame structure. The four end corners of the torsion frame 11 are respectively installed and fixed to the inner sides of the front edge beam body and the rear edge beam body of the sub-frame 1 to be tested. The middle part of the torsion frame 11 is integrally fixedly connected with pin-connecting platforms 12 on both sides along the Z-axis direction. The sub-frame torsion test assembly also includes a torsion actuating mechanism pin-connected to the pin-connecting platforms 12 on both sides, and the torsion frame 11 is driven to perform a torsion action through the reverse motion output of the two torsion actuating mechanisms.

[0025] The present invention provides a novel six-axis durability test equipment, which fixes the two ends of the sub-frame 1 to be tested by a side fixing frame 2. When performing the durability test, there is no need to separate the sub-frame 1 and the suspension bearing frame 17, and the two can be subjected to force synchronously in one body. The end face of the suspension bearing frame 17 facing away from the sub-frame 1 is connected to the test actuation plate 3, and the test actuation mechanism in three mutually perpendicular directions in the three-dimensional space is respectively connected to the test actuation plate 3. The reciprocating linear motion output by the test actuation mechanism in three directions can accurately simulate the motion load in any direction within the entire space range, thereby ensuring the accuracy of the durability test. This method can synchronously test the sub-frame 1 and the suspension shaft. The support frame 17 simulates the stress condition of the outer end of the suspension; the front edge beam and the rear edge beam of the sub-frame 1 are fixed by the torsion frame 11, and the torsion actuating mechanism drives the torsion frame 11 to torsion forward and backward, which can effectively simulate the torsion stress that the sub-frame 1 is borne in the actual working process. This six-axis durability test equipment for automobile chassis parts can test chassis subframes and suspensions with more complete structures, and with the actuating structure with comprehensive directions, the test conditions are closer to the actual working conditions of the vehicle chassis, which effectively solves the technical problem that the test conditions in the existing vehicle chassis durability test equipment design are greatly different from the actual working conditions of the chassis, resulting in poor reference of the test data.

[0026] In the technical solution provided in this embodiment, the suspension test assembly also includes a positioning and fine-tuning mechanism, which includes a standard positioning rod 20, and both ends of the standard positioning rod 20 are pinned to the outer connection points of the sub-frame end and the connection points of the suspension bearing frame 17 respectively to replace the suspension connecting rod 21 at the position to be tested. The middle area of ​​the standard positioning rod 20 is pinned with a vertical connecting rod 13 with an adjustable length, and the other end of the vertical connecting rod 13 is connected to the side fixed frame 2 at the corresponding position.

[0027] This design is set to ensure the test effect on the chassis workpiece, especially when it is necessary to conduct a separate test on a certain local bracket position or a higher intensity test action on a local area, the suspension link 21 between the subframe and the suspension bearing frame 17 is replaced by a positioning and fine-tuning mechanism, and the two ends of the standard positioning rod 20 of the positioning and fine-tuning mechanism are respectively connected to a group of relative connection points between the end of the subframe and the suspension bearing frame 17. The positioning and fine-tuning mechanism is connected to the side fixing frame 2 which has a good fixing effect through the vertical connecting rod 13, and the vertical connecting rod 13 itself can adjust the length. By adjusting the length of the vertical connecting rod 13, the initial stress between the subframe and the suspension bearing frame 17 can be adjusted to simulate special working conditions.

[0028] In the technical solution provided in this embodiment, the X-axis test actuation mechanism includes two groups of hydraulic actuators 9 that are parallelly distributed up and down along the Z-axis direction. Both groups of hydraulic actuators 9 are parallel to the X-axis, and their respective output ends are respectively used to connect with different positions on both sides of the test actuation plate 3. This design provides a preferred X-axis test actuation mechanism design, which provides the driving power for the test by two groups of hydraulic actuators 9 arranged in parallel, and the two are respectively at different positions along the Z-axis direction of the test actuation plate 3. Therefore, the X-axis test actuation mechanism can not only provide a single-direction push and pull of the test actuation plate 3 along the X-axis direction through the synchronous output feed of the two hydraulic actuators 9, but also output a torsional motion to the test actuation plate 3 and the bearing seat connected thereto through the differential output or reverse output of the two hydraulic actuators 9.

[0029] In the technical solution provided in this embodiment, the X-axis test actuation mechanism further includes a linear guide sliding seat 10 pinned to the output ends of the two hydraulic actuators 9, respectively, and the end of the linear guide sliding seat 10 is pinned to the test actuation plate 3 through a linear pull rod 7. In order to ensure the parallelism of the two hydraulic actuators 9 of the X-axis test actuation mechanism and the linearity of the output motion, the linear guide sliding seat 10 is provided and pinned to the test actuation plate 3 through a linear pull rod 7.

[0030] In the technical solution provided in this embodiment, the Y-axis test actuation mechanism includes a right-angle commutator 5 and a hydraulic actuator 9 arranged along the X-axis direction. The right-angle commutator 5 includes a rotating shaft 15 along the Z-axis direction and a rotating plate 14 rotatably connected to the top of the rotating shaft 15. The two end corners of the rotating plate 14 are respectively connected to the output end of the hydraulic actuator 9 and the test actuation plate 3 through linear pull rods 7. This design optimizes the design of the Y-axis test actuation mechanism, wherein the hydraulic actuator 9 is also arranged along the X-axis direction and converted into a driving force along the Y direction by the right-angle commutator 5. This design can set the test power structure in one direction to the maximum extent, so as to minimize the space occupied by the equipment. The right-angle commutator 5 includes two parts, the rotating shaft 15 and the rotating plate 14. The directions of the connecting rods at both ends of the rotating plate 14 are perpendicular to each other.

[0031] In the technical solution provided in this embodiment, the Z-axis test actuation mechanism includes a hydraulic actuator 9 arranged along the Z-axis direction and a gantry 4 connected to the fixed end of the hydraulic actuator 9, the output end of the hydraulic actuator 9 is connected to a transverse transmission frame 16 arranged along the X-axis direction, and the two ends of the transverse transmission frame 16 are respectively pinned to different positions of the test actuation plate 3 through linear pull rods 7. This design provides a simple and effective Z-axis test actuation mechanism design, which provides fixation for the hydraulic actuator 9 through the structure of the gantry 4, and the gantry 4 is suspended above the sub-frame to be tested, wherein the hydraulic actuator 9 is arranged along the Z-axis, and its output end is pinned to the test actuation plate 3 through the transverse transmission frame 16 and the linear pull rod 7.

[0032] In the technical solution provided in this embodiment, the torsion actuation mechanism includes two groups of hydraulic actuators 9 distributed in parallel up and down along the Z-axis direction, and the output ends of the hydraulic actuators 9 are pin-connected to the two pin-connecting platforms 12 of the torsion frame 11 through linear connecting rods. This design optimizes the torsion actuation mechanism, and the setting method of the torsion actuation mechanism is similar to the design of the X-axis test actuation mechanism. It also pins the two hydraulic actuators 9 arranged in parallel with the torsion frame 11 at two different positions up and down, and outputs differential or reverse feed through the two hydraulic actuators 9, thereby realizing the output of torsion drive action to the torsion frame 11. This design has a simple structure and good controllability.

[0033] The technical solution provided in this embodiment also includes a base plate assembly 6, and the base of the side fixed frame 2 is installed and fixed to the top surface of the base plate assembly 6. This design improves the stability of the device and the fixation of the subframe to be tested. The base plate assembly 6 is set to fix the side fixed frame 2, the gantry 4 and the fixed ends of each hydraulic actuator 9. The base plate assembly 6 preferably adopts a design that can be assembled and expanded and has an array of mounting slots, which is convenient for the installation and fixation of each structure and is easy to adjust adaptively.

[0034] In the technical solution provided in this embodiment, a plurality of positioning columns 8 are fixedly mounted on the base plate assembly 6, and each positioning column 8 is respectively positioned and connected with the fixed end of each hydraulic actuator 9 of the X-axis test actuation mechanism, the Y-axis test actuation mechanism and the torsion actuation mechanism. This design provides a preferred solution for fixing the hydraulic actuator 9, and the positioning column 8 can be relatively conveniently adjusted on the base plate assembly 6. The positioning column 8 is perpendicular to the base plate surface, and the axial direction of the hydraulic actuator 9 is perpendicular to the positioning column 8. Depending on the specific structural distribution, multiple hydraulic actuators 9 can also be positioned and installed on the same positioning column 8.

[0035] In the technical solution provided in this embodiment, the guide sliding seat includes two sets of parallel fixed slider seats 18 and two slide rails 19 respectively slidingly matched with the fixed slider seats 18, the two ends of the two slide rails 19 are respectively hinged with the corresponding hydraulic actuator 9 and the linear connecting rod through the connector, and the fixed slider seat 18 is positioned and matched with the base plate assembly 6 through the positioning column 8. This design provides a preferred guide sliding seat design, which is mainly composed of the fixed slider seat 18 and the slide rail 19, the fixed slider seat 18 is preferably positioned and matched with the base plate assembly 6 through the positioning column 8, and the slide rail 19 is connected to the hydraulic actuator 9, and the design of the two sets of fixed slider seats 18 and the two slide rails 19 can ensure the straightness of the guide.

[0036] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A six-axis durability test equipment for automobile chassis parts, characterized in that: include: The sub-frame support frame group comprises two side fixing frames (2) respectively fixed with pins at two ends of the sub-frame (1) to be tested, the side fixing frames (2) being door-shaped, and two side frames thereof being respectively connected with two outer side pin-connecting platforms (12) at one end of the sub-frame (1) to be tested; A suspension test assembly comprises a test actuation plate (3), the test actuation plate (3) corresponding to the position of a suspension bearing frame (17) connected to one side of a subframe (1) to be tested, and a plate surface on one side of the test actuation plate (3) being used for being fitted and fixed with the outer end surface of the suspension bearing frame (17); the suspension test assembly further comprises an X-axis test actuation mechanism, a Y-axis test actuation mechanism and a Z-axis test actuation mechanism, the three being pin-connected to the test actuation plate (3) at different positions, and respectively used for driving the test actuation plate (3) to perform reciprocating test motion in three mutually perpendicular directions; A sub-frame torsion test assembly comprises a torsion frame (11), the torsion frame (11) being an I-shaped frame structure, the four corners of the torsion frame (11) being respectively fixedly mounted on the inner sides of the front edge beam body and the rear edge beam body of the sub-frame (1) to be tested, and the middle part of the torsion frame (11) being respectively integrally fixedly connected with pin-connecting platforms (12) on the upper and lower sides along the Z-axis direction; the sub-frame torsion test assembly further comprises torsion actuating mechanisms pin-connected to the pin-connecting platforms (12) on both sides, and the torsion frame (11) is driven to perform a torsion action through the reverse motion output of the two torsion actuating mechanisms.

2. The six-axis durability test equipment for automobile chassis parts according to claim 1 is characterized in that: The suspension test assembly also includes a positioning and fine-tuning mechanism, which includes a standard positioning rod (20), the two ends of which are pin-connected to the outer connection points of the end of the subframe (1) and the connection points of the suspension bearing frame (17) respectively, so as to replace the suspension connecting rod (21) at the position to be tested, and the middle area of ​​the standard positioning rod (20) is pin-connected to a vertical connecting rod (13) with adjustable length, and the other end of the vertical connecting rod (13) is connected to the side fixing frame (2) at the corresponding position.

3. The six-axis durability test equipment for automobile chassis parts according to claim 2 is characterized in that: The X-axis test actuation mechanism comprises two groups of hydraulic actuators (9) which are distributed in parallel up and down along the Z-axis direction, the two groups of hydraulic actuators (9) are parallel to the X-axis direction, and the output ends of the hydraulic actuators (9) are respectively used to connect to different positions on both sides of the test actuation plate (3).

4. The six-axis durability test equipment for automobile chassis parts according to claim 3 is characterized in that: The X-axis test actuation mechanism further comprises a linear guide sliding seat (10) respectively pin-connected to the output ends of the two hydraulic actuators (9), and the end of the linear guide sliding seat (10) is pin-connected to the test actuation plate (3) via a linear pull rod (7).

5. The six-axis durability test equipment for automobile chassis parts according to claim 4, characterized in that: The Y-axis test actuation mechanism comprises a right-angle commutator (5) and a hydraulic actuator (9) arranged along the X-axis direction, the right-angle commutator (5) comprises a rotating shaft (15) along the Z-axis direction and a rotating plate (14) rotatably connected to the top end of the rotating shaft (15), and the two end corners of the rotating plate (14) are respectively connected to the output end of the hydraulic actuator (9) and the test actuation plate (3) through linear pull rods (7).

6. The six-axis durability test equipment for automobile chassis parts according to claim 5, characterized in that: The Z-axis test actuation mechanism comprises a hydraulic actuator (9) arranged along the Z-axis direction and a gantry (4) connected to a fixed end of the hydraulic actuator (9); the output end of the hydraulic actuator (9) is connected to a transverse transmission frame (16) arranged along the X-axis direction; and both ends of the transverse transmission frame (16) are pin-connected to different positions of the test actuation plate (3) via linear pull rods (7).

7. The six-axis durability test equipment for automobile chassis parts according to claim 5, characterized in that: The torsion actuation mechanism comprises two groups of hydraulic actuators (9) which are distributed in parallel up and down along the Z-axis direction, and the output ends of the hydraulic actuators (9) are pin-connected to the two pin-connecting platforms (12) of the torsion frame (11) through linear connecting rods.

8. The six-axis durability test equipment for automobile chassis parts according to claim 7, characterized in that: It also comprises a base plate assembly (6), and the base of the side fixing frame (2) is mounted and fixed to the top surface of the base plate assembly (6).

9. The six-axis durability test equipment for automobile chassis parts according to claim 8, characterized in that: A plurality of positioning columns (8) are mounted and fixed on the base plate assembly (6), and each positioning column (8) is respectively positioned and connected to a fixed end of each hydraulic actuator (9) of the X-axis test actuation mechanism, the Y-axis test actuation mechanism and the torsion actuation mechanism.

10. The six-axis durability test equipment for automobile chassis parts according to claim 8, characterized in that: The guide sliding seat comprises two sets of fixed sliding seat (18) distributed in parallel and two sliding rail members (19) respectively slidably matched with the fixed sliding seat (18), the two ends of the two sliding rail members (19) being respectively hinged to the corresponding hydraulic actuator (9) and the linear connecting rod through the connecting head, and the fixed sliding seat (18) is positioned and matched with the base plate assembly (6) through the positioning column (8).

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