Complex stress simulation control arm anti-fatigue performance testing device

Abstract

The utility model relates to the technical field of anti-fatigue testing equipment, in particular to a complex stress simulation control arm anti-fatigue performance testing device which comprises a base, testing seats are arranged at the front end and the rear end of the top of the base, a control arm is clamped between the two testing seats, a movable guide rail is arranged in the middle of the top of the base, and a multi-point force application mechanism is arranged on the movable guide rail. The multi-point force application mechanism comprises a holding and clamping base and a movable lantern ring, the movable lantern ring is of an annular structure, a plurality of threaded rods are arranged on the movable lantern ring, and the inner ends of the threaded rods abut against the control arms. According to the complex stress simulation control arm anti-fatigue performance testing device, through the movable guide rail and the multi-point force application mechanism, threaded rods of different positions and numbers on the movable lantern ring can abut against different force bearing points of a control arm, complex multi-directional stress borne by the control arm in actual work can be simulated, and the test accuracy is improved. Therefore, the purpose of multi-angle, multi-direction and multi-stress state simulation test of the control arm is achieved, and more reliable data support is provided for design optimization and quality control of the control arm.

Description

Technical Field

[0001] This utility model relates to the technical field of fatigue testing equipment, specifically a fatigue performance testing device for a complex stress simulation control arm. Background Technology

[0002] The control arm plays a crucial role in vehicle operation, bearing various complex stresses from the road surface and suspension system. Research on the fatigue performance of control arms under complex stress simulation tests the durability of control arms by simulating stress changes under real-world operating conditions, providing an important guarantee for the safe and stable operation of vehicles.

[0003] Utility model patent CN217385068U discloses a testing device for an automobile control arm. This device includes two incomplete gears, one and two, fixed coaxially. The first incomplete gear has three-quarters of a tooth, and the second incomplete gear has one-quarter of a tooth, with their teeth complementing each other. The first incomplete gear meshes with a driven gear, which is connected to an eccentric rocker arm. The other end of the rocker arm is rotatably connected to a connecting mechanism. The second incomplete gear meshes with another driven gear, which has a transmission assembly. The other end of the transmission assembly has a cam pressing mechanism, located above the connecting mechanism. A stepper motor is keyed to the axial direction of the first incomplete gear. The first and second incomplete gears drive the rocker arm and the cam pressing mechanism to continuously switch actions. After reciprocating, the ball pin is subjected to downward pressure, completing a single fatigue test. Under the continuous drive of the stepper motor, fatigue testing of the ball pin is continuously performed, improving the testing efficiency of the ball pin.

[0004] The current automotive control arm testing device, through the coordination of an incomplete gear set, driven gear, rocker arm, transmission components, and cam pressing mechanism, can only achieve single-mode fatigue testing of the ball joint under specific reciprocating swing and downward movements. This testing method has limitations and cannot simulate the complex stresses that the control arm experiences under actual working conditions, such as multi-directional and multi-dimensional dynamic stresses. Therefore, we propose a complex stress simulation control arm fatigue performance testing device. Utility Model Content

[0005] The purpose of this invention is to provide a fatigue performance testing device for a complex stress simulation control arm, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A fatigue performance testing device for a complex stress simulation control arm includes a base, with test seats at both the front and rear ends of the top of the base. The control arm is clamped between the two test seats. A dovetail-shaped movable guide rail is provided on the top center of the base. A multi-point force application mechanism is slidably connected to the movable guide rail, and the control arm passes through the multi-point force application mechanism.

[0008] The multi-point force application mechanism includes a clamp seat that can slide left and right along the movable guide rail and a movable collar for applying force to the control arm;

[0009] The clamping seat has a clamping groove on its front end face. Several rollers are rotatably connected to the top and bottom sides of the clamping groove. A pressure plate is fixed to the front end face of the clamping seat by bolts. A slide is provided at the bottom end of the clamping seat. The slide slides and clamps the clamping seat on the movable guide rail.

[0010] The movable collar has a ring structure, and the bottom side of the movable collar passes through the clamping groove. The roller abuts against the surface of the movable collar. Several through screw holes are opened in a ring at equal intervals on the outer surface of the movable collar. According to the number of force points required for the control arm to bear force, a corresponding number of threaded rods are threaded into the screw holes. The inner end of the threaded rod passes through the corresponding threaded rod and abuts against the control arm.

[0011] Preferably, a plurality of guide posts are provided at the rear end face of the pressure plate, and the plurality of guide posts are inserted into the front end face of the clamping seat and slidably connected to the clamping seat.

[0012] In this setup, the guide post provides precise guidance for the installation of the pressure plate, ensuring that the pressure plate and the clamping seat are quickly and accurately aligned, while also enhancing the stability of the pressure plate after installation and preventing it from shifting during testing.

[0013] Preferably, the left end of the slide is provided with a clamping block, and the right edge of the bottom end of the slide and the bottom end of the clamping block are both provided with clamping heads, and the two clamping heads are respectively clamped on the left and right sides of the movable guide rail.

[0014] In this configuration, the clamping head and the clamping block work together to firmly hold the slide table on the movable guide rail. This ensures that the multi-point force application mechanism can flexibly slide and adjust its position along the guide rail, while also providing reliable clamping force when fixed to prevent the device from moving during testing.

[0015] Preferably, a threaded protrusion is fixed in the middle of the left end face of the slide, the left end of the threaded protrusion passes through the clamping block, a screw handle is threadedly connected to the left end of the threaded protrusion, and the right end face of the screw handle abuts against the clamping block.

[0016] In this setting, the relative position of the clamp and the slide can be adjusted by rotating the handle, so as to achieve precise locking of the clamp seat on the movable guide rail. The operation is simple and the fixing effect is reliable, and it is easy to adjust flexibly according to the testing requirements.

[0017] Preferably, the left end face of the slide is provided with two positioning posts on both sides, and the left ends of the two positioning posts pass through the clamping block and are slidably connected to the clamping block.

[0018] In this setting, the positioning column auxiliary clamp is precisely positioned on the slide table to prevent the clamp from shifting when the handle is rotated, thereby further improving the accuracy and stability of the clamp seat fixation.

[0019] Preferably, the outer end of the threaded rod is provided with a lever, which penetrates vertically through the outer end of the threaded rod and is fixedly connected to the threaded rod.

[0020] In this setting, the lever provides the operator with a point of force application, greatly reducing the difficulty of rotating the threaded rod and making the process of adjusting the contact position between the threaded rod and the control arm and the amount of force applied easier and more convenient.

[0021] Preferably, the inner end of the threaded rod is fitted with an abutment, which is rotatable at the inner end of the threaded rod. When the threaded rod is rotated so that the inner end of the threaded rod is close to the control arm, the abutment can abut against the surface of the control arm.

[0022] In this configuration, the abutment can rotate at the inner end of the threaded rod, so that when it contacts the surface of the control arm, it can protect the surface of the control arm and prevent the control arm from being damaged by the rotating threaded rod.

[0023] Preferably, the front end face of the movable collar is provided with a plurality of radially arranged positioning protrusions, and the rear end face of the pressure plate is provided with a positioning groove that matches the size of the positioning protrusions. When the bolts on the pressure plate are tightened to make the pressure plate press against the front end of the clamp seat, the positioning protrusions extend into the positioning groove.

[0024] In this setting, the positioning protrusion cooperates with the positioning groove, allowing the position of the movable collar in the clamping seat to be finely adjusted. At the same time, it can accurately position the movable collar when installing the pressure plate, preventing the movable collar from rotating or shifting in the clamping groove.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] This complex stress simulation control arm fatigue performance testing device, by setting dovetail movable guide rails and multi-point force application mechanisms on the base, allows threaded rods of different positions and numbers on the movable collar to abut against different force points of the control arm. This enables the simulation of complex multi-directional stresses borne by the control arm in actual operation, achieving the purpose of simulating and testing the control arm under multi-angle, multi-directional, and multi-stress conditions, and providing more reliable data support for the design optimization and quality control of the control arm. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the base structure in this utility model;

[0029] Figure 3 This is a schematic diagram of the multi-point force application mechanism in this utility model;

[0030] Figure 4 This is an exploded view of the clamping seat in this utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the pressure plate of this utility model;

[0032] Figure 6 This is a schematic diagram of the movable collar in this utility model;

[0033] The meanings of the labels in the diagram are as follows:

[0034] 1. Base; 11. Test mount; 12. Movable guide rail;

[0035] 2. Control arm;

[0036] 3. Multi-point force application mechanism; 31. Clamping seat; 311. Clamping groove; 3111. Roller; 312. Pressure plate; 3121. Guide post; 3122. Positioning groove; 313. Slide table; 3131. Threaded protrusion; 3132. Positioning post; 3133. Rotary handle; 314. Clamping block; 315. Clamping head; 32. Movable collar; 321. Threaded hole; 322. Threaded rod; 3221. Lever; 3222. Abutment joint; 323. Positioning protrusion. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please see Figures 1-6 A complex stress simulation control arm fatigue performance testing device includes a base 1, with test seats 11 at both the front and rear ends of the top of the base 1. The control arm 2 is clamped between the two test seats 11. A dovetail-shaped movable guide rail 12 is provided on the top center of the base 1. A multi-point force application mechanism 3 is slidably connected to the movable guide rail 12, and the control arm 2 passes through the multi-point force application mechanism 3. The multi-point force application mechanism 3 includes a clamping seat 31 that can slide left and right along the movable guide rail 12 and a movable collar 32 for applying force to the control arm 2. The control arm 2 passes through the inside of the movable collar 32.

[0039] like Figures 3-5 As shown, in this utility model, a clamping groove 311 is provided on the front end face of the clamping seat 31. The clamping groove 311 is used to accommodate the movable collar 32. The bottom side of the movable collar 32 passes through the clamping groove 311. Several rollers 3111 are rotatably connected on the top and bottom sides of the groove wall of the clamping groove 311. The rollers 3111 abut against the surface of the movable collar 32. The rollers 3111 can reduce the friction of the movable collar 32 when it moves, ensuring that it moves smoothly in the clamping seat 31.

[0040] A pressure plate 312 is bolted to the front end of the clamping seat 31. The pressure plate 312, in conjunction with the bolts, secures the movable collar 32, preventing it from detaching from the clamping seat 31. Several guide posts 3121 are located at the rear end of the pressure plate 312. These guide posts 3121 are inserted into the front end of the clamping seat 31 and slidably connected to it. The guide posts 3121 provide guidance and positioning for the installation of the pressure plate 312, ensuring accurate installation.

[0041] like Figure 3 and Figure 4 As shown, specifically, the bottom end of the clamping seat 31 is provided with a slide 313, which slides and clamps on the movable guide rail 12. The left end of the slide 313 is provided with a clamping block 314. The right edge of the bottom end of the slide 313 and the bottom end of the clamping block 314 are both provided with clamping heads 315. The two clamping heads 315 are respectively clamped on the left and right sides of the movable guide rail 12. The slide 313 and the clamping heads 315 enable the clamping seat 31 to slide stably on the movable guide rail 12, realizing the position adjustment of the multi-point force application mechanism 3.

[0042] A threaded protrusion 3131 is fixed to the middle of the left end face of the slide table 313. The left end of the threaded protrusion 3131 passes through the clamping block 314. A handle 3133 is threadedly connected to the left end of the threaded protrusion 3131. The right end face of the handle 3133 abuts against the clamping block 314. The fastening structure formed by the clamping block 314, the threaded protrusion 3131, and the handle 3133 can be adjusted to a suitable position and the handle 3133 can be tightened. This causes the clamping block 314 to be clamped to the slide table 313 on the movable guide rail 12 under the pressure of the handle 3133, preventing the multi-point force application mechanism 3 from moving during the test and ensuring test accuracy.

[0043] like Figure 4 and Figure 5 As shown, furthermore, two positioning posts 3132 are provided on both sides of the left end face of the slide table 313. The left ends of the two positioning posts 3132 pass through the clamping block 314 and are slidably connected to the clamping block 314. The positioning posts 3132 can assist the clamping block 314 in precise positioning and prevent the clamping block 314 from shifting when the handle 3133 is rotated to tighten the clamping seat 31, thereby improving the reliability of the clamping seat 31.

[0044] like Figure 3 and Figure 6 As shown, the movable collar 32 has a ring structure. The front end face of the movable collar 32 is provided with several radially arranged positioning protrusions 323. The rear end face of the pressure plate 312 is provided with a positioning groove 3122 that matches the size of the positioning protrusions 323. When the bolts fixing the pressure plate 312 are tightened so that the pressure plate 312 is pressed against the front end face of the clamping seat 31, the positioning protrusions 323 extend into the positioning groove 3122. The annular structure of the movable collar 32 facilitates the arrangement of force application points around the control arm 2. Through the cooperation of the positioning protrusion 323 and the positioning groove 3122, the movable collar 32 can be accurately positioned when the pressure plate 312 is fixed, ensuring the stability of the movable collar 32 during the test, thereby making the force application more accurate. When the bolts fixing the pressure plate 312 are loosened, the pressure plate 312 can move away from the clamp seat 31, allowing the positioning protrusion 323 to disengage from the positioning groove 3122. At this time, the movable collar 32 can rotate axially in the clamp seat 31, thereby achieving the purpose of finely adjusting the position of the threaded rod 322 on the movable collar 32 against the control arm 2, so as to meet the needs of multi-angle force application simulation.

[0045] like Figure 3 and Figure 6 As shown, it is worth noting that the outer surface of the movable collar 32 has several through screw holes 321 arranged in a ring at equal intervals. A corresponding number of threaded rods 322 are threaded into these screw holes 321 according to the number of force application points required for the control arm 2. The inner ends of the threaded rods 322 pass through the corresponding threaded rods 322 and abut against the control arm 2. The arrangement of the screw holes 321 and threaded rods 322 allows for flexible adjustment of the number and position of force application points according to actual testing requirements.

[0046] A lever 3221 is provided at the outer end of the threaded rod 322. The lever 3221 vertically passes through the outer end of the threaded rod 322 and is fixedly connected to the threaded rod 322. An abutment 3222 is sleeved at the inner end of the threaded rod 322. The abutment 3222 can rotate at the inner end of the threaded rod 322. When the threaded rod 322 is rotated so that the inner end of the threaded rod 322 is close to the control arm 2, the abutment 3222 can abut against the surface of the control arm 2, so that the inner end of the threaded rod 322 abuts against the outer wall of the control arm 2. The lever 3221 facilitates the operator to rotate the threaded rod 322 so that the abutment 3222 can abut against the surface of the control arm 2, realizing the application of force to the control arm 2 in multiple directions and dimensions, effectively simulating complex stress states. The abutment 3222 is made of silicone material and protects the control arm 2, preventing damage to the surface of the control arm 2 from the rotating end of the threaded rod 322.

[0047] When using the complex stress simulation control arm fatigue performance testing device of this embodiment, firstly, the slide table 313 of the multi-point force application mechanism 3 is installed on the dovetail movable guide rail 12, and the control arm 2 is placed between the test seats 11 at both ends of the base 1 for stable clamping, and the control arm 2 passes through the inside of the movable collar 32 to complete the basic installation preparation work of the testing device.

[0048] Then, according to the testing requirements of control arm 2, after adjusting the position of clamp seat 31 on movable guide rail 12, by rotating handle 3133, the clamp seat 31 is fixed and precisely positioned on movable guide rail 12 by the cooperation of threaded protrusion 3131 and positioning post 3132, ensuring that clamp seat 31 will not shift during testing and guaranteeing the accuracy of testing; next, by loosening the bolts fixing pressure plate 312, pressure plate 312 can be moved away from clamp seat 31, at which point positioning protrusion 323 is disengaged from positioning groove 3122, allowing the movable arm 2 to move freely. The collar 32 can rotate axially within the clamping groove 311, thereby achieving the purpose of fine-tuning the position of the threaded rod 322 on the movable collar 32 against the control arm 2, so as to meet the needs of multi-angle force simulation. Finally, according to the stress conditions that the control arm 2 needs to bear, a corresponding number of threaded rods 322 are installed in the threaded hole 321 of the movable collar 32. By rotating the threaded rod 3221 through the lever 3221, the abutment 3222 abuts against the surface of the control arm 2, and the magnitude of the applied force is adjusted according to the test requirements, thereby realizing the complex stress simulation test of the control arm 2.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fatigue performance testing device for a complex stress simulation control arm, comprising a base (1), wherein test seats (11) are provided at both the front and rear ends of the top of the base (1), and a control arm (2) is clamped between the two test seats (11), characterized in that: The base (1) is provided with a dovetail-shaped movable guide rail (12) at the top center. A multi-point force application mechanism (3) is slidably connected to the movable guide rail (12), and the control arm (2) passes through the multi-point force application mechanism (3). The multi-point force application mechanism (3) includes a clamp seat (31) that can slide left and right along the movable guide rail (12) and a movable collar (32) for applying force to the control arm (2). The clamping seat (31) has a clamping groove (311) on its front end face. Several rollers (3111) are rotatably connected to the top and bottom sides of the clamping groove (311). A pressure plate (312) is fixed to the front end face of the clamping seat (31) by bolts. A slide (313) is provided at the bottom end of the clamping seat (31). The slide (313) slides and clamps on the movable guide rail (12). The movable collar (32) has a ring structure. The bottom side of the movable collar (32) passes through the clamping groove (311). The roller (3111) abuts against the surface of the movable collar (32). The outer surface of the movable collar (32) is provided with a number of through screw holes (321) at equal intervals in a ring shape. According to the number of force points required for the control arm (2), a corresponding number of threaded rods (322) are threaded in the screw holes (321). The inner end of the threaded rod (322) passes through the corresponding threaded rod (322) and abuts against the control arm (2).

2. The fatigue performance testing device for a complex stress simulation control arm according to claim 1, characterized in that: The rear end face of the pressure plate (312) is provided with a plurality of guide posts (3121), and the plurality of guide posts (3121) are inserted into the front end face of the clamping seat (31) and slidably connected to the clamping seat (31).

3. The fatigue performance testing device for a complex stress simulation control arm according to claim 1, characterized in that: The left end of the slide (313) is provided with a clamping block (314), and the right edge of the bottom end of the slide (313) and the bottom end of the clamping block (314) are provided with clamping heads (315). The two clamping heads (315) are respectively clamped on the left and right sides of the movable guide rail (12).

4. The fatigue performance testing device for a complex stress simulation control arm according to claim 3, characterized in that: A threaded protrusion (3131) is fixed in the middle of the left end face of the slide (313). The left end of the threaded protrusion (3131) passes through the clamping block (314). A screw handle (3133) is threadedly connected to the left end of the threaded protrusion (3131). The right end face of the screw handle (3133) abuts against the clamping block (314).

5. The fatigue performance testing device for a complex stress simulation control arm according to claim 4, characterized in that: Two positioning posts (3132) are provided on both sides of the left end face of the slide (313). The left ends of the two positioning posts (3132) pass through the clamping block (314) and are slidably connected to the clamping block (314).

6. The fatigue performance testing device for a complex stress simulation control arm according to claim 1, characterized in that: The outer end of the threaded rod (322) is provided with a lever (3221), which vertically passes through the outer end of the threaded rod (322) and is fixedly connected to the threaded rod (322).

7. The fatigue performance testing device for a complex stress simulation control arm according to claim 1, characterized in that: The inner end of the threaded rod (322) is fitted with an abutment (3222), which can rotate on the inner end of the threaded rod (322). When the threaded rod (322) is rotated so that the inner end of the threaded rod (322) is close to the control arm (2), the abutment (3222) can abut against the surface of the control arm (2).

8. The fatigue performance testing device for a complex stress simulation control arm according to claim 1, characterized in that: The front end face of the movable collar (32) is provided with a plurality of radially arranged positioning protrusions (323), and the rear end face of the pressure plate (312) is provided with a positioning groove (3122) that matches the size of the positioning protrusions (323). When the bolts on the pressure plate (312) are tightened and the pressure plate (312) is pressed against the front end face of the clamping seat (31), the positioning protrusions (323) extend into the positioning groove (3122).

Images