阅读说明：本技术 一种单纵臂悬架组件的台架试验装置 (Bench test device of single trailing arm suspension assembly ) 是由 陈杰 申回春 王亚荣 何云江 贺佳鑫 石朝阳 王海庆 于 2021-05-25 设计创作，主要内容包括：本发明公开了一种单纵臂悬架组件的台架试验装置,涉及汽车悬架试验领域,包括车轮侧工装、车架侧工装和作动缸；车轮侧工装与车架侧工装间隔设置以安装单纵臂悬架组件中的轴管；车轮侧工装上设有第一安装部,车架侧工装上设有与第一安装部同轴的第二安装部,轴管的车轮侧可转动的安装在第一安装部上；轴管的车架侧安装在第二安装部上且车架侧工装可对轴管进行周向固定；作动缸的端头与导向臂前端的卷耳铰接,作动缸施力作用在导向臂前端实现对整个单纵臂悬架组件的性能测试；本方案由传统的“两端夹紧,中间施力”的方式改为“中间夹紧,单边施力”的方式,以完成对整个单纵臂悬架组件的刚强度测试和疲劳耐久测试。(The invention discloses a rack test device for a single-trailing-arm suspension assembly, which relates to the field of automobile suspension tests and comprises a wheel side tool, a frame side tool and an actuating cylinder; the wheel side tool and the frame side tool are arranged at intervals to install a shaft tube in the single-trailing-arm suspension assembly; the wheel side tool is provided with a first mounting part, the frame side tool is provided with a second mounting part coaxial with the first mounting part, and the wheel side of the shaft tube is rotatably mounted on the first mounting part; the frame side of the shaft tube is arranged on the second installation part, and a frame side tool can circumferentially fix the shaft tube; the end of the actuating cylinder is hinged with the eye at the front end of the guide arm, and the force exerted by the actuating cylinder acts on the front end of the guide arm to realize the performance test of the whole single-trailing-arm suspension assembly; the scheme is changed from a traditional mode of clamping two ends and applying force in the middle into a mode of clamping in the middle and applying force on one side, so that the rigidity strength test and the fatigue endurance test of the whole single-trailing-arm suspension assembly are completed.)

1. A bench test device of a single-trailing-arm suspension assembly is characterized by comprising a wheel side tool (10), a frame side tool (20) and an actuating cylinder (30);

the wheel side tool (10) and the frame side tool (20) are arranged at intervals to install a shaft tube (600) in the single-trailing-arm suspension assembly; a first installation part is arranged on the wheel side tool (10), a second installation part coaxial with the first installation part is arranged on the frame side tool (20), and the wheel side of the shaft tube (600) is rotatably installed on the first installation part; the frame side of the shaft tube (600) is arranged on the second installation part, and the frame side tool (20) can circumferentially fix the shaft tube (600);

a guide arm (100) in the single-trailing-arm suspension assembly is fixed on the axle tube (600) through a locking mechanism; the end of the actuating cylinder (30) is hinged with a lug at the front end of the guide arm (100), and the actuating cylinder (30) applies force to the front end of the guide arm (100) to realize performance test of the whole single-trailing-arm suspension assembly.

2. The bench test device of a single trailing arm suspension assembly according to claim 1 wherein the first mounting portion is a first shaft hole (11) provided in the wheel side tooling (10); the second mounting part is a second shaft hole (21) formed in the frame side tool (20); the wheel side of the axle tube (600) is rotatably arranged in the first axle hole (11), and the frame side of the axle tube (600) is arranged in the second axle hole (21).

3. The bench test device of the single trailing arm suspension assembly of claim 2, wherein the frame side tooling (20) comprises a base and an end cover, the end surfaces of the base opposite to the end cover are provided with arc-shaped concave cavities, and the two arc-shaped concave cavities are matched to form the second shaft hole (21); the end cap and the base are fixed by bolts, and the bolts are tightened to circumferentially fix the shaft tube (600) positioned in the second shaft hole (21).

4. The bench test device of a single trailing arm suspension assembly according to claim 3 wherein the end of the actuating cylinder (30) is hinged to the eye of the leading arm (100) by a hinge lug (31), the hinge lug (31) being movably connected to a guard for stabilizing the actuating cylinder (30).

5. The bench test device of a single trailing arm suspension assembly of claim 4 wherein, the guard includes a bearing plate (41) and a guard table (42), the guard table (42) is provided with a guard bar (43); one end of the bearing plate (41) is fixed with the hinge lug (31), and the other end of the bearing plate is sleeved with the protective rod (43).

6. The bench test device for a single trailing arm suspension assembly according to claim 5, wherein the adapting plate (41) is provided with a through hole at one end of the protection rod (43), the diameter of the through hole is larger than that of the protection rod (43), and the adapting plate (41) is sleeved with the protection rod (43) through the through hole.

7. The bench test rig of a single trailing arm suspension assembly of claim 1 or 6, characterized in that, the bench test rig further includes a reaction table (50), the reaction table (50) is provided with an abutment member (51), and the abutment member (51) abuts against an airbag mounting plate (500) mounted at the trailing end of the guide arm (100).

8. The bench test rig of a single trailing arm suspension assembly of claim 7, wherein the single trailing arm suspension assembly further comprises an upper pallet plate (200) and a lower pallet plate (201); the locking mechanism comprises a cover plate (300) and a U-shaped bolt (301); the upper supporting plate (200) and the lower supporting plate (201) are both semicircular and are welded with the shaft tube (600) in a matching way; the cover plate (300) and the U-shaped bolt (301) are connected in a matched mode, so that the middle section of the guide arm (100) is connected with the upper supporting plate (200) in a locking mode.

9. The bench test device of the single trailing arm suspension assembly of claim 8, wherein the outer arc surface of the upper supporting plate (200) is provided with a protrusion in the left-right direction, the protrusion is smoothly connected with the outer arc surface of the upper supporting plate (200), and the upper supporting plate (200) and the protrusion together form an arch structure matched with the middle section of the guide arm (100).

10. The bench test rig of a single trailing arm suspension assembly of claim 9, wherein a spacer (400) is further provided between the upper plate (200) and the leading arm (100).

Technical Field

The invention relates to the field of automotive suspension tests, in particular to a bench test device for a single-trailing-arm suspension assembly.

Background

The bench test for the single-trailing-arm suspension assembly is one of the common means for verifying the fatigue durability of the single-trailing-arm suspension assembly; the bench test method of the single trailing arm suspension assembly generally comprises the following steps: the front end of the guide arm is hinged with the ear rolling lining tool, the tail end of the guide arm fixedly connects the air bag mounting hole with the tool through a bolt, and the tool is connected with the ground through a spherical hinge sliding block pair. And then the middle section (namely the central hole position) of the guide arm is assembled and fixedly connected with the end head of the actuating cylinder, so that a test scheme (such as application number: 2021100650936; name: a bracket beam test tool; scheme adopted in the test scheme) for fixing two ends of the single-trailing-arm suspension assembly and applying force to the middle is formed. However, in practical application, we find that the following disadvantages exist when testing the single trailing arm suspension assembly by adopting a scheme of fixing two ends and applying force in the middle:

1. because the loading is carried out at the position of the central hole, the vertical force of the front action point and the rear action point of the guide arm is balanced in a lever ratio all the time, namely, the test can only simulate the working condition that the suspension is impacted vertically (namely, under the working condition of vertical impact, the actual vertical force of the front action point and the rear action point of the guide arm is balanced in a lever ratio). And there is the operating mode that heels in the in-service use, the operating mode that heels (under this kind of operating mode, the vertical power of the fore-and-aft action point of guiding arm has obviously deviated lever proportion) leads to very big additional torque to transmit to axletree department through the guiding arm interlude (being centre bore position), and at this moment, the guiding arm subassembly all receives very big additional load, including parts such as guiding arm, upper plate support, U type bolt, apron, central siphon and the upper plate support all receive very big additional load with the joint weld structure of central siphon, the operating mode that heels often is the leading cause that fatigue failure appears in the guiding arm subassembly. However, the simulation test verification of the roll condition is lacked in the conventional verification test.

2. For a common guide arm product with an offset rear end air bag mounting hole, a pair of single trailing arm suspension assemblies must be used for simultaneous test, otherwise, the vertical load loaded by the actuating cylinder deviates from a connecting line of front and rear action points of the guide arm, so that the test equipment and a tested workpiece are in an unexpected unstable state; however, due to the problems of the mounting and adjusting accuracy of the testing device arranged by the conventional scheme, and the size difference, the rigidity difference and the like of the left and right guide arms caused by the manufacturing error of the suspension assembly, the test loads borne by the left and right guide arms in the test are inconsistent (that is, theoretically, the left and right guide arms should bear the same test load, namely, the load applied by the actuator cylinder is divided equally, but the actual test loads borne by the left and right guide arms are inconsistent because the outer dimensions of the left and right guide arms are different due to factors such as the manufacturing error and the assembling error), and the fatigue life obtained by the test is distorted.

3. In addition, the load force value is large when the load is applied to the middle section, and the load force value is doubled due to the need of simultaneously applying the load to the pair of guide arms. Thus, the load capacity of the actuator cylinder is highly required.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a novel bench test device for a single-longitudinal-arm suspension assembly, which can be used for realizing the test of the single-longitudinal-arm suspension assembly under a roll working condition and independently carrying out a rigid strength bearing load test on the single-longitudinal-arm suspension assembly, so that the purposes of improving the accuracy of test data, improving the conformity of a fatigue test and an actual working condition and reducing the load force value of a test equipment actuating cylinder are achieved.

The specific scheme provided by the invention is as follows:

a bench test device for a single-trailing-arm suspension assembly comprises a wheel side tool, a frame side tool and an actuating cylinder;

the wheel side tool and the frame side tool are arranged at intervals to install an axle tube in the single-trailing-arm suspension assembly; the wheel side tool is provided with a first installation part, the frame side tool is provided with a second installation part coaxial with the first installation part, and the wheel side of the shaft tube is rotatably installed on the first installation part; the frame side of the shaft tube is arranged on the second installation part, and the frame side tool can circumferentially fix the shaft tube;

a guide arm in the single-trailing-arm suspension assembly is fixed on the axle tube through a locking mechanism; the end of the actuating cylinder is hinged with the lug at the front end of the guide arm, and the acting force of the actuating cylinder acts on the front end of the guide arm to realize the performance test of the whole single-trailing-arm suspension assembly.

Further, the first mounting portion is a first shaft hole formed in the wheel-side tooling; the second mounting part is a second shaft hole formed in the tool on the side of the frame; the wheel side of the shaft tube is rotatably arranged in the first shaft hole, and the frame side of the shaft tube is arranged in the second shaft hole.

Further, the frame side tool comprises a base and an end cover, wherein arc-shaped concave cavities are formed in the end faces, opposite to the end cover, of the base, and the two arc-shaped concave cavities are matched to form the second shaft hole; the end cover and the base are fixed through bolts, and the bolts are screwed down to enable the shaft tube in the second shaft hole to be fixed circumferentially.

Furthermore, the end of the actuating cylinder is hinged with the rolling lug of the guide arm through a hinge lug, the hinge lug is movably connected with a protection device, and the protection device is used for ensuring the stability of the actuating cylinder.

Furthermore, the protection device comprises a bearing plate and a protection platform, and a protection rod is arranged on the protection platform; one end of the bearing plate is fixed with the hinge lug, and the other end of the bearing plate is sleeved with the protective rod.

Furthermore, one end of the bearing plate, which is positioned at the protective rod, is provided with a through hole, the diameter of the through hole is larger than that of the protective rod, and the bearing plate is sleeved with the protective rod through the through hole.

Further, the bench test device further comprises a reaction table, wherein a butting part is arranged on the reaction table and is butted with an air bag mounting plate arranged at the tail end of the guide arm.

Further, the single trailing arm suspension assembly further comprises an upper supporting plate and a lower supporting plate; the locking mechanism comprises a cover plate and a U-shaped bolt; the upper supporting plate and the lower supporting plate are both semicircular and are welded with the shaft tube in a matching way; the cover plate and the U-shaped bolt are connected in a matched mode, so that the middle section of the guide arm is connected with the upper supporting plate in a locking mode.

Furthermore, the left and right direction department of the outer cambered surface of the upper supporting plate is all provided with a bulge, the bulge is smoothly connected with the outer cambered surface of the upper supporting plate, and the upper supporting plate and the bulge jointly form an arch structure matched with the middle section of the guide arm.

Furthermore, a gasket is arranged between the upper supporting plate and the guide arm.

The beneficial effect that adopts this technical scheme to reach does:

according to the scheme, the traditional mode of clamping at two ends and applying force in the middle is changed into a mode of clamping in the middle and applying force on one side by changing a clamping mode, so that the rigid strength load test of the front half section of the guide arm is completed; through adopting above device, not only can verify the first half section of guiding arm and endure fatigue strength, solve the guiding arm potential problems such as vertical load distortion of back and forth action point, can also verify the reliability that guiding arm and central siphon are connected, the tiredness isoparametric of central siphon.

Drawings

FIG. 1 is an exploded view of a single trailing arm suspension assembly.

FIG. 2 is a combined block diagram of a single trailing arm suspension assembly.

Fig. 3 is a perspective view of the bench test apparatus.

Fig. 4 is a use state diagram of the mounting of the single trailing arm suspension assembly to the bench test apparatus for testing.

Wherein: the device comprises a 10-wheel-side tool, a 11-first shaft hole, a 20-frame-side tool, a 21-second shaft hole, a 30-acting cylinder, a 31-hinge lug, a 41-bearing plate, a 42-protection platform, a 43-protection rod, a 50-reaction platform, a 51-abutting piece, a 100-guide arm, a 101 front half section, a 102 middle section, a 103 rear half section, a 200 upper supporting plate, a 201 lower supporting plate, a 300 cover plate, a 301U-shaped bolt, a 400 gasket, a 500-airbag mounting plate and a 600 shaft tube.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

This embodiment provides a rack test device of single trailing arm suspension subassembly, through utilizing this rack test device to realize being in the analogue test of the operating mode that heels to single trailing arm suspension subassembly, solve the problem that appears because of the vertical load distortion of guide arm fore-and-aft action point, verified single trailing arm subassembly simultaneously under the operating mode that heels, guide arm, upper plate support, U type bolt, lid version, parts such as central siphon and the fatigue performance of the weld structure of being connected of upper plate support and central siphon.

In this embodiment, referring to fig. 1-2, the single trailing arm suspension assembly comprises a leading arm 100, an upper supporting plate 200, a lower supporting plate 201, a cover plate 300, a U-bolt 301, a pad 400, an airbag mounting plate 500, and a shaft tube 600. for better description, the leading arm 100 is defined to have a front half section 101, a middle section 102, and a rear half section 103, a lug of the leading arm 100 is located at the front half section 101, and the airbag mounting plate 500 is mounted at the rear half section 103 of the leading arm 100.

The structure of the bench test apparatus will be described in detail below:

referring to fig. 3 to 4, the bench test apparatus includes a wheel side tooling 10, a frame side tooling 20, and an actuating cylinder 30;

the wheel side tool 10 and the frame side tool 20 are arranged at intervals to mount an axle tube 600 in the single-trailing-arm suspension assembly; the wheel side tool 10 is provided with a first mounting part, the frame side tool 20 is provided with a second mounting part coaxial with the first mounting part, and the first mounting part and the second mounting part are arranged for mounting the axle tube 600 with the wheel side tool 10 and the frame side tool 20; that is, the wheel side of the shaft tube 600 is rotatably mounted on the first mounting portion; the frame side of central tube 600 is installed on the second installation portion and frame side tool 20 can circumferentially fix central tube 600.

Circumferential fixation is understood herein to mean preventing rotation of axle tube 600, i.e., both sides (wheel side, frame side) of axle tube 600 are connected to the first and second mounting portions, respectively; when the frame side tool 20 circumferentially fixes the axle tube 600, the axle tube 600 cannot rotate; when the axle tube 600 is released from the frame side tooling 20, the axle tube 600 can rotate under the supporting action of the first mounting part and the second mounting part.

Utilize frame side frock 20 to carry out circumference to central siphon 600 and fix, its main aim at realizes fixing the pilot arm 100 on central siphon 600 and carry out the analogue test of the operating mode that inclines, and the tip that actuates jar 30 is articulated with the reel ear of pilot arm 100 front end promptly, and the effect of actuating jar 30 application of force realizes the capability test to whole single trailing arm suspension subassembly at the pilot arm 100 front end.

In order to realize the simulation test of the tilting working condition, the specific operation steps can be understood as follows;

firstly, mounting a single trailing arm suspension assembly on a wheel side tool 10 and a frame side tool 20, and respectively connecting an axle tube 600 therein with a first mounting part and a second mounting part;

secondly, the axle tube 600 is locked circumferentially by the frame side tool 20, so that the axle tube 600 cannot rotate on the second mounting part, and the whole single-trailing-arm suspension assembly is fixed;

thirdly, the actuating cylinder 30 applies force to the front end of the guide arm 100, and the performance test of the fatigue resistance of the front half section of the guide arm 100 is realized in hundreds of thousands of load tests.

In the scheme, the axle tube 600 is locked and fixed through the frame side tool 20, which is equal to the middle position (middle section) of the guide arm 100; meanwhile, the force is applied to the front end of the guide arm 100 by the movable cylinder 30 to finish the unilateral force application to the guide arm 100; compare in the tradition to leading arm 100 carry out the test mode of "both ends press from both sides tightly, middle application of force", this scheme can the problem that vertical load distortion of effectual test leading arm 100 front and back action point brought, accomplishes the effective simulation of the operating mode that heels.

And, through utilizing as the movable cylinder to carry out unilateral application of force to single guide arm, compare in the traditional mode that needs the movable cylinder to carry out the application of force to a pair of (being two) guide arms at the intermediate position, this scheme makes the load capacity requirement of movable cylinder obtain obviously reducing (the load capacity of this scheme movable cylinder only needs to satisfy about one fourth of traditional movable cylinder), has very big promotion effect to the safety of operational environment.

Meanwhile, in the scheme, when the frame side tool 20 is used for performing the rolling condition simulation test on the locking and fixing of the axle tube 600, the additional test can be performed on the other performances (such as welding fatigue, connecting piece fatigue, anti-loosening performance and axle tube bending and twisting fatigue) of the single-trailing-arm suspension assembly, and for convenience of further description, the structure of the single-trailing-arm suspension assembly is described in detail here.

In the present embodiment, referring to fig. 1-2, the upper supporting plate 200 and the lower supporting plate 201 are both semicircular and are welded to the shaft tube 600 in a matching manner; the cover plate 300 and the U-shaped bolt 301 are connected in a matching manner, so that the middle section of the guide arm 100 is locked and connected with the upper support plate 200.

The cover plate 300 and the U-shaped bolt 301 can be collectively referred to as a locking mechanism, and the guide arm 100 is fixedly connected with the shaft tube 600 under the locking action of the locking mechanism (the cover plate 300 and the U-shaped bolt 301); when the force of the actuating cylinder 30 acts on the front end of the guide arm 100, the front half section of the guide arm 100 swings up and down; in hundreds of thousands of load swing tests, the welding fatigue test of the upper supporting plate 200, the lower supporting plate 201 and the shaft tube 600, the connection fatigue test and the anti-loosening performance test of the connection of the cover plate 300 and the U-shaped bolt 301, and the torsion fatigue and the bending fatigue test of the shaft tube 600 can be simultaneously performed.

In this scheme, direction department about the outer cambered surface of upper plate 200 all is equipped with the arch, protruding and 200 outer cambered surface smooth connection of upper plate, upper plate 200 and protruding form the domes with the adaptation of guide arm 100 interlude jointly.

The interlude of guiding arm 100 is connected with the laminating of this domes to guaranteed the stability that guiding arm 100 and layer board 200 are connected, also realized the stability of being connected with central siphon 600, had very big promotion effect to the accurate nature of final test data.

Optionally, a spacer 400 is provided between the arch and the guide arm 100 to further ensure the stability of the connection of the guide arm 100 to the upper plate 200.

In the present embodiment, referring to fig. 3 to 4, the first mounting portion is a first axle hole 11 provided in the wheel-side tooling 10; the second mounting part is a second shaft hole 21 formed on the frame side tool 20; the connection between the axle tube 600 and the first and second mounting portions is substantially the rotation of the axle tube 600 at the wheel side in the first axle hole 11 and the rotation of the axle tube 600 at the frame side in the second axle hole 21.

Meanwhile, the frame side tool 20 comprises a base and an end cover, wherein arc-shaped concave cavities are formed in the end faces of the base opposite to the end cover, and the two arc-shaped concave cavities are matched to form a second shaft hole 21; the end caps are bolted to the base and tightening the bolts causes the end caps to press against the base so that the shaft tube 600 located in the second shaft hole 21 is circumferentially fixed.

After the axle tube 600 is fixed in the circumferential direction, it can be understood that the middle position of the guide arm 100 is fixed at this time, and the cylinder 30 is actuated to apply force to the front half section of the guide arm 100, so as to simulate the tilting condition.

However, in hundreds of thousands and millions of load tests, the front half section of the guide arm 100 is easily broken, and after the guide arm 100 is broken, the force-increasing ball on the actuating cylinder 30 is in an unstable shaking state, and the shaking of the force-increasing ball causes the end of the actuating cylinder 30 to also swing unstably, thereby bringing great danger to the operating environment; thus, to avoid dangerous situations. The end of the cylinder 30 is hinged to the roller of the guide arm 100 via a hinge lug 31, and the hinge lug 31 is movably connected to a guard for stabilizing the cylinder 30.

Specifically, the protection device comprises a bearing plate 41 and a protection platform 42, and a protection rod 43 is arranged on the protection platform 42; one end of the bearing plate 41 is fixed with the hinge lug 31, and the other end is sleeved with the guard rod 43.

It will be appreciated that a further guard is provided at the end of the cylinder 30 for this purpose, so that even if the first half of the guide arm 100 breaks, the end of the cylinder 30 will not be affected by the limitation of the adapter plate 41 and guard 42 to the end of the cylinder 30, even if the force-increasing ball is in an unstable sloshing condition, thereby avoiding the situation where the end swings with the broken guide arm.

In this embodiment, a through hole is formed at one end of the receiving plate 41 located on the protection rod 43, the diameter of the through hole is larger than that of the protection rod, and the receiving plate 41 is sleeved with the protection rod 43 through the through hole.

Here, a through hole is provided, and the diameter of the through hole is larger than the diameter of the protection rod 43, because when the actuating cylinder 30 applies force on the guide arm 100, the front half section of the guide arm 100 swings, and the actuating cylinder 30 needs a certain movement range to cooperate with the same; it is understood that the diameter of the through hole is larger than the diameter of the guard bar in order to form a moving space of the cylinder 30.

After the tilting working condition test of the guide arm is completed, a vertical impact working condition needs to be simulated, and the whole fatigue strength of a single guide arm is tested, so that in the embodiment, the bench test device further comprises a reaction table 50, a butt part 51 is arranged on the reaction table 50, and the butt part 51 is abutted to an air bag mounting plate 500 arranged at the tail end of the guide arm 100.

Here the abutment 51 on the reaction platform 50 can be adjusted so that the abutment 51 is easily disengaged from the airbag mounting plate mounted at the trailing end of the guide arm.

It should be noted that, when testing the overall fatigue strength of a single guide arm 100, it is necessary to ensure that the axle tube 600 is in a rotatable state, that is, at this time, the bolts on the end covers need to be loosened to release the circumferential locking of the frame side tooling 20 on the axle tube 600, that is, at this time, the frame side tooling 20 only supports the axle tube 600 (that is, the connection bolts of the frame side tooling base and the end covers are loosened to make the axle tube 600 rotatable), and the main purpose of the test is to realize the simulation test of the vertical impact working condition of the guide arm 100 fixed on the axle tube 600; at this time, the shaft tube 600 can rotate in the first and second shaft holes 11 and 21, which is equivalent to a rotation bearing function.

The specific operation steps can be summarized as follows:

firstly, mounting a single trailing arm suspension assembly on a wheel side tool 10 and a frame side tool 20, and respectively connecting an axle tube 600 therein with a first mounting part and a second mounting part;

secondly, loosening bolts on the frame side tool 20 to release circumferential locking of the axle tube 600, wherein the axle tube 600 can rotate relative to the first mounting part and the second mounting part and has the same function as a rotating bearing;

thirdly, abutting the air bag mounting plate 500 at the tail end of the guide arm 100 with the abutting part 51 on the reaction table 50, and performing matching positioning by using a positioning pin of the positioning hole abutting part 51 on the air bag mounting plate 500; used for forming a limit to the guide arm;

thirdly, the cylinder 30 applies force to the front end of the guide arm 100, and the airbag mounting plate 500 at the tail end of the guide arm 100 acts on the abutting piece 51 under the action of the counterforce; the performance test of the integral fatigue resistance of the guide arm 100 is realized in hundreds of thousands of load tests.

Of course, in the performance test of the fatigue resistance of the entire pilot arm 100, the welding fatigue, the connection fatigue, and the looseness prevention performance between the parts in the single trailing arm suspension assembly can be also completed.

According to the scheme, through the structural design of the frame side tool 20, the clamping mode is changed from the traditional test mode of clamping two ends and applying force in the middle to a mode of clamping in the middle and applying force on one side, so that the rigid strength load resistance test on the front half section of the guide arm 100 is completed, the simulation of the tilting working condition is realized, and the potential problems of vertical load distortion and the like of the front and rear action points of the guide arm are solved; meanwhile, the matching of the frame side tool 20, the reaction platform 50 and the abutting part 51 is utilized, the traditional scheme that a pair of left and right guide arms are required to be tested simultaneously is abandoned, and the accurate test of load data is realized only by testing a single guide arm.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.