Multidirectional stress hardness testing structure for automobile trial-manufactured part

Abstract

The invention relates to the technical field of automobile trial-manufactured part testing, in particular to a multidirectional stress hardness testing structure for automobile trial-manufactured parts, which comprises a rack and a machine base fixedly connected to the bottom of the rack, a hydraulic device is fixedly connected to the top of the rack, and a loading disc is mounted at the bottom of the telescopic end of the hydraulic device. And a test piece seat is arranged at the top of the machine base. The multidirectional stress hardness testing structure for the automobile trial-manufactured part has the advantages that the hydraulic device is arranged to provide pressure, the loading disc is used for loading the pressure on the part, and the part can be firstly placed at the top of the test piece part of the test piece seat when the multidirectional stress hardness testing structure is used; then, the tested part can be clamped through the clamp parts until the main clamp shafts of the two clamp parts are in contact with the surface of the part, and the part can be placed at any position of the top of the test piece part because the moving action of the slip sheet can be stopped after the slip sheet is pushed to the main clamp shafts by the liquid.

Description

Technical Field

[0001] This invention relates to the field of automotive prototype parts testing technology, specifically a multi-directional stress hardness testing structure for automotive prototype parts. Background Technology

[0002] As is well known, automotive prototype parts refer to non-mass-produced standard parts manufactured during the automotive R&D and small-batch trial production stages to verify design schemes, process feasibility, and vehicle compatibility. They are a core link connecting automotive design and mass production and are widely used in prototype manufacturing, bench testing, road testing, and other scenarios. The pressure strength test of automotive prototype parts is a core test to verify the structural reliability, material mechanical properties, and design rationality of the parts under pressure loads. It directly determines whether the prototype parts meet the requirements of vehicle assembly, performance testing, and mass production conversion. It mainly targets key load-bearing prototype parts such as body structural parts, chassis load-bearing parts, and powertrain components.

[0003] In existing technologies, hydraulic universal testing machines are often used to apply pressure and record the stress and deformation of automotive prototype parts. However, many parts are not standard parts and their outer contours are usually not flat, making it difficult to fix them in a conventional way during testing. The rigid clamps that apply large pressure affect the deformation trend of the parts when they are under pressure. In addition, such testing machines usually only allow changing the pressure application position or multiple stress points by changing the loading head when applying pressure, which is not very flexible. It is difficult to adjust the pressure application point as needed, and it is also difficult to stably adjust the angle of the parts to simulate the tilting stress, making it inconvenient to use. Based on the above-mentioned situation, we found that it is difficult to avoid the above problems in the existing technology for stress hardness testing of automotive prototype parts. Therefore, we propose a multi-directional stress hardness testing structure for automotive prototype parts that can flexibly change the pressure loading position, can flexibly adapt to different part shapes for temporary fixation, reduce the pressure required for fixation to ensure test accuracy, and can allow parts to be subjected to pressure testing at multiple angles. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a multi-directional stress hardness testing structure for automotive prototype parts. It has the advantages of flexibly changing the pressure loading position, adapting to different part shapes for temporary fixation, reducing the required fixation pressure to ensure testing accuracy, and allowing parts to be subjected to pressure testing at multiple angles.

[0005] (II) Technical Solution The above-mentioned technical objective of the present invention is achieved through the following technical solution: a multi-directional stress hardness testing structure for automotive prototype parts, comprising a frame and a base fixedly connected to the bottom of the frame, a hydraulic device fixedly connected to the top of the frame, a loading plate installed at the bottom of the telescopic end of the hydraulic device, a specimen seat provided on the top of the base, and two sets of clamping parts provided on the top of the specimen seat. The specimen holder includes a support, a force-bearing arc plate is fixedly connected to the top of the support, a limiting slide frame is fixedly connected to both sides of the top of the support, an arc frame is slidably connected to the top of the force-bearing arc plate, a side frame is fixedly connected to both ends of the arc frame, the outer side of the side frame is slidably connected to the inner side of the limiting slide frame, and a specimen part is fixedly connected to the top of the arc frame. The fixture includes an empty frame, with two sets of empty frames located on both sides of the specimen holder. A sliding plate is slidably connected to the inner side of the empty frame. A clamping rod is slidably connected to the side of the empty frame near the support. The side of the clamping rod near the sliding plate is fixedly connected to the sliding plate. A rotating seat is fixedly connected to the side of the clamping rod away from the sliding plate. A clamping frame is rotatably connected to the side of the rotating seat away from the clamping rod. An electric cylinder is fixedly connected to the inner side of the clamping frame. A main clamping shaft is rotatably connected to the side of the clamping frame away from the rotating seat. Two side frames are rotatably connected to the side of the clamping frame away from the rotating seat. A secondary clamping shaft is rotatably connected to the inner side of the side frames. A torsion spring is fixedly connected between the clamping frame and the rotating seat.

[0006] Using the above technical solution, pressure is provided by a hydraulic device and applied to the part by a loading plate. In use, the part can be placed on top of the test piece section of the test piece holder. Then, the clamping unit can clamp the test part. First, liquid is injected into the empty frame. At this time, the sliding plate is pushed by the liquid inside the empty frame, and the connecting rod moves towards the part until the main clamping shafts of both sets of clamping units contact the surface of the part. Since the sliding plate can stop moving after being pushed to the main clamping shaft by the liquid, the part can be placed at any position on top of the test piece section, instead of using traditional clamps to fix the part. At one end of the position, the side frame can then be rotated along the clamping frame by an electric cylinder, and contacted on the surface of the part through two secondary clamping shafts, so as to contact the irregular external contour of the non-standard part through three-point contact. When it is difficult to make complete contact, the clamping frame can be rotated along the rotating base so that the clamping point can fit the secondary clamping shaft and the main clamping shaft. At this time, the torsion spring will also store force, and after the test, it will be reset by the rebound of the torsion spring, thus completing the fixation of the part. Then, according to the required pressure angle of the part, the arc frame can be rotated along the support and the force arc plate until the required angle is reached. During the rotation, the side slides on the inside of the limiting slide frame to assist in support and play a limiting role.

[0007] The present invention is further configured such that: the top of the base is provided with two sets of electric guide rails, the bottom of the bottom electric guide rail is fixedly connected to the top of the base, the slide of the bottom electric guide rail is fixedly connected to the bottom of the top electric guide rail, the slide of the top electric guide rail is fixedly connected to a flat frame, and the top of the flat frame is fixedly connected to a support.

[0008] By adopting the above technical solution, an electric guide rail can be set up to drive the flat frame to move horizontally or vertically at the top of the machine base, so as to adjust the horizontal position of the entire specimen base and achieve the effect of adjusting the different pressure positions of the parts.

[0009] The present invention is further configured such that: a secondary seat is fixedly connected to the left side of the support, a servo motor is fixedly connected to the top of the secondary seat, an external gear is fixedly connected to the output end of the servo motor, an internal gear is fixedly connected to the left side of the left side frame, and the outer side of the external gear and the internal gear are meshed together.

[0010] By adopting the above technical solution, and by setting up a secondary seat in conjunction with a servo motor, it is possible to drive the internal gear and the side frame connected to it to tilt forward or backward by driving the external gear to rotate forward or backward, thereby driving and controlling the tilt angle of the parts during clamping.

[0011] The invention is further configured such that: a fork frame is connected at the height of the telescopic end of the electric cylinder, and two transmission pins are fixedly connected to the side of the fork frame away from the electric cylinder, with the top and bottom of the two transmission pins slidably connected to the inner sides of the two side frames respectively.

[0012] By adopting the above technical solution, by setting a fork frame and a transmission pin, when the electric cylinder pushes and pulls the fork frame, the transmission pin connected to it will slide on the inside of the side frame, and the side frame will be controlled to rotate along the clamp frame to open and close, thereby controlling the opening and closing angle of the side frame to fit the surface of the part.

[0013] The invention is further configured such that: a connecting frame is fixedly connected to the outer side of each of the two side frames, and the two connecting frames are fixedly connected to the two empty frames respectively on the side of the empty frame closer to the empty frame.

[0014] By adopting the above technical solution, a connecting frame is set up to fix and support the positions of the two empty frames, so that they are stably located on both sides of the specimen holder.

[0015] The invention is further configured such that: a metal pipe is fixedly connected to the bottom of the empty frame by a sealing element, and a water tank and a pump device are fixedly connected to the inner side of the arc-shaped frame, with the pump device communicating with the water tank and the metal pipe respectively.

[0016] By adopting the above technical solution, a water tank is set up to store liquid, and a pump device is used to pump the liquid into a metal pipe to input the liquid into the inside of the empty frame and push the sliding plate. The same metal pipe can input liquid into the inside of two empty frames, so that after one sliding plate stops moving, the other sliding plate can still move into the clamping position.

[0017] The present invention is further configured such that: the loading disk includes a force-bearing inner ring, a sub-bracket is slidably connected to the outer side of the force-bearing inner ring, a loading module is slidably connected to the outer side of the sub-bracket, a loading rod is fixedly connected to the bottom of the loading module, and a pressure sensor is fixedly connected to the bottom of the loading rod.

[0018] By adopting the above technical solution, multiple positions for loading modules can be formed by setting up a force-bearing inner ring and sub-supports. The required number of loading modules can be selected as needed and installed in different positions on different sub-supports. At the same time, the position of the sub-supports can be adjusted along the force-bearing inner ring to flexibly adjust the number and position of the loading pressure points, and the pressure is applied through the loading rod.

[0019] The present invention is further configured such that: a friction pad is fixedly connected to the inner side of the loading module, the friction pad is in contact with the bracket, a mounting bolt is threadedly connected to the top of the loading module, and the bottom of the mounting bolt penetrates the friction pad and the bottom of the loading module and is threadedly connected to the loading rod.

[0020] By adopting the above technical solution, friction pads are set up to prevent displacement of the loading module when it is manually fixed on the outside of the sub-bracket through high friction. Furthermore, the loading module is stably installed on the outside of the sub-bracket by mounting bolts to prevent it from loosening.

[0021] The present invention is further configured such that: the top of the sub-bracket is threadedly connected to a fastening screw, and the bottom of the fastening screw is fixedly connected to the inner ring under force.

[0022] By adopting the above technical solution, after the sub-bracket slides along the inner ring of the force-bearing ring to the required position, it can be tightened by setting a fastening screw, so that it presses against the top of the inner ring of the force-bearing ring to fix the position of the sub-bracket.

[0023] The present invention is further configured such that: a pressure plate is fixedly connected to the inner side of the inner ring of the force-bearing device; the top of the pressure plate is connected to the telescopic end of the hydraulic device; an auxiliary frame is fixedly connected to the top of the pressure plate; the bottom of the auxiliary frame is connected to the auxiliary outer ring; and the bottom of the auxiliary outer ring is slidably connected to the top of the sub-support.

[0024] By adopting the above technical solution, a pressure plate is set up to connect to the pressure output end of the hydraulic device and provide pressure to the entire loading plate. The auxiliary ring set up works in conjunction with the auxiliary outer ring to provide auxiliary support to the bracket.

[0025] (III) Beneficial Effects Compared with the prior art, the present invention provides a multi-directional stress hardness testing structure for automotive prototype parts, which has the following beneficial effects: This multi-directional stress and hardness testing structure for automotive prototype parts uses a hydraulic device to provide pressure and a loading plate to apply pressure to the part. In use, the part is first placed on top of the test piece section of the test piece holder. Then, the clamping section holds the part in place. First, liquid is injected into the empty frame. The sliding vane is pushed by the liquid inside the empty frame, and the connecting rod moves towards the part until the main clamping shafts of both sets of clamping sections contact the surface of the part. Since the sliding vane's movement stops after being pushed to the main clamping shafts by the liquid, the part can be placed at any position on top of the test piece section, unlike traditional methods. The fixture fixes one end of the part, and then the side frame can be rotated along the clamping frame by the electric cylinder. It contacts the surface of the part through two auxiliary clamping shafts, so as to contact the irregular external contour of the non-standard part through three-point contact. When it is difficult to make complete contact, the clamping frame can be rotated along the rotating base so that the clamping point can fit the auxiliary clamping shaft and the main clamping shaft. At this time, the torsion spring will also store force, and after the test, it will be reset by the rebound of the torsion spring, thus completing the fixation of the part. Then, according to the required pressure angle of the part, the arc frame can be rotated along the support and the force arc plate until the required angle is reached. During the rotation, the side slides on the inside of the limiting slide frame to assist in support and play a limiting role. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the connection of the flat frame in this invention; Figure 3 This is a schematic diagram of the bottom of the specimen holder in this invention; Figure 4 This is a schematic diagram of the specimen holder in this invention; Figure 5 This is a schematic diagram of the fixture part in this invention; Figure 6 This is a schematic diagram of the fork frame connection in this invention; Figure 7 This is a schematic diagram of the bottom of the loading disk in this invention; Figure 8 This is a schematic diagram of the loading disk structure in this invention; Figure 9 This is a schematic diagram of the frame structure in this invention; Figure 10 In this invention Figure 8 A magnified view of a portion of point A in the middle.

[0027] In the diagram: 1. Frame; 2. Base; 3. Hydraulic device; 4. Loading plate; 41. Inner ring under stress; 42. Sub-support; 43. Loading module; 44. Loading rod; 5. Specimen holder; 51. Support; 52. Stress-bearing arc plate; 53. Limiting slide frame; 54. Arc frame; 55. Side frame; 56. Specimen section; 6. Fixture section; 61. Empty frame; 62. Sliding plate; 63. Clamping rod; 64. Rotary seat; 65. Clamping frame; 66. Electric... 67. Cylinder; 68. Main clamping shaft; 69. Side frame; 60. Secondary clamping shaft; 7. Electric guide rail; 8. Flat frame; 9. Sub-seat; 10. Servo motor; 11. External gear; 12. Internal gear; 13. Fork frame; 14. Transmission pin; 15. Connecting frame; 16. Metal pipe; 17. Water tank; 18. Pump device; 19. Friction pad; 20. Mounting bolt; 21. Fastening screw; 22. Pressure plate; 23. Auxiliary frame; 24. Auxiliary outer ring. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] Please see Figure 1-9 A multi-directional stress hardness testing structure for automotive prototype parts includes a frame 1 and a base 2 fixedly connected to the bottom of the frame 1. A hydraulic device 3 is fixedly connected to the top of the frame 1. A loading plate 4 is installed at the bottom of the telescopic end of the hydraulic device 3. A specimen seat 5 is provided on the top of the base 2. Two sets of clamping parts 6 are provided on the top of the specimen seat 5. The specimen holder 5 includes a support 51, a force-bearing arc plate 52 is fixedly connected to the top of the support 51, a limiting slide frame 53 is fixedly connected to both sides of the top of the support 51, an arc frame 54 is slidably connected to the top of the force-bearing arc plate 52, a side frame 55 is fixedly connected to both ends of the arc frame 54, the outer side of the side frame 55 is slidably connected to the inner side of the limiting slide frame 53, and a specimen part 56 is fixedly connected to the top of the arc frame 54. The fixture part 6 includes an empty frame 61. Two sets of empty frames 61 are located on both sides of the specimen holder 5. A sliding plate 62 is slidably connected to the inner side of the empty frame 61. A clamping rod 63 is slidably connected to the side of the empty frame 61 near the support 51. The side of the clamping rod 63 near the sliding plate 62 is fixedly connected to the sliding plate 62. A rotating seat 64 is fixedly connected to the side of the clamping rod 63 away from the sliding plate 62. A clamping frame 65 is rotatably connected to the side of the rotating seat 64 away from the clamping rod 63. An electric cylinder 66 is fixedly connected to the inner side of the clamping frame 65. A main clamping shaft 67 is rotatably connected to the side of the clamping frame 65 away from the rotating seat 64. Two side frames 68 are rotatably connected to the side of the clamping frame 65 away from the rotating seat 64. A secondary clamping shaft 69 is rotatably connected to the inner side of the side frames 68. A torsion spring is fixedly connected between the clamping frame 65 and the rotating seat 64. By providing pressure through a hydraulic device 3 and applying pressure to the part through a loading plate 4, the part can be placed on top of the test piece section 56 of the test piece holder 5 during use. Then, the clamping part can be clamped by the fixture section 6. First, liquid is injected into the interior of the empty frame 61. At this time, the slider 62 is pushed by the liquid inside the empty frame 61, and the connecting clamping rod 63 moves towards the part until the main clamping shafts 67 of both sets of fixture sections 6 contact the surface of the part. Since the movement of the slider 62 can be stopped after the liquid pushes it to the main clamping shaft 67, the part can be placed at any position on top of the test piece section 56, instead of the traditional method of fixing the part's position with a single clamp. Then, the electric cylinder 66 can push the side frame 68 to rotate along the clamping frame 65, and the two auxiliary clamping shafts 69 contact the surface of the part to make contact with the irregular outer contour of the non-standard part through three-point contact. When it is difficult to make complete contact, the clamping frame 65 can be rotated along the rotating seat 64 so that the clamping point can fit the auxiliary clamping shaft 69 and the main clamping shaft 67. At this time, the torsion spring will also store force, and after the test is completed, it will be reset by the rebound of the torsion spring, thus completing the fixation of the part. Then, according to the required pressure angle of the part, the arc frame 54 can be rotated along the support 51 and the force arc plate 52 until the required angle is reached. During the rotation, the side slides on the inner side of the limiting slide frame 53 to assist in support and play a limiting role.

[0031] The base 2 has two sets of electric guide rails 7 on its top. The bottom of the bottom electric guide rail 7 is fixedly connected to the top of the base 2, and the slide of the bottom electric guide rail 7 is fixedly connected to the bottom of the top electric guide rail 7. The slide of the top electric guide rail 7 is fixedly connected to a flat frame 8, and the top of the flat frame 8 is fixedly connected to a support 51. By setting the electric guide rails 7, the flat frame 8 can be driven to move horizontally or vertically on the top of the base 2 to adjust the horizontal position of the entire specimen seat 5, thereby achieving the effect of adjusting the different pressure positions of the part. A secondary seat 9 is fixedly connected to the left side of the support 51, and a servo motor 1 is fixedly connected to the top of the secondary seat 9. 0. An external gear 11 is fixedly connected to the output end of the servo motor 10. An internal gear 12 is fixedly connected to the left side of the left side frame 55. The outer side of the external gear 11 and the internal gear 12 are meshed. By setting a sub-base 9 in conjunction with the servo motor 10, it is easy to drive the internal gear 12 and the connected side frame 55 to tilt forward or backward by driving the external gear 11 to rotate forward or backward. This is used to drive and control the tilt angle of the part during clamping. A fork frame 13 is connected to the telescopic end of the electric cylinder 66. Two transmission pins 14 are fixedly connected to the side of the fork frame 13 away from the electric cylinder 66. The tops of the two transmission pins 14 The bottom and the two sides of the frame 68 are slidably connected to the inner sides of the two side frames 68, respectively. By setting the fork frame 13 in conjunction with the transmission pin 14, when the electric cylinder 66 pushes or pulls the fork frame 13, the transmission pin 14 will slide on the inner side of the side frame 68, and the side frame 68 will be controlled to rotate along the clamping frame 65 to open and close, thus controlling the opening and closing angle of the side frame 68 to fit the surface of the part. Connecting brackets 15 are fixedly connected to the outer sides of both side frames 55. The two connecting brackets 15 are fixedly connected to the two empty frames 61 on the side closest to the empty frame 61, respectively. By setting the connecting brackets 15, the position of the two empty frames 61 is fixed and supported, so that... It is stably located on both sides of the specimen holder 5. The bottom of the empty frame 61 is fixedly connected to the metal pipe 16 through a sealing element. The inner side of the arc frame 54 is fixedly connected to the water tank 17 and the pump device 18. The pump device 18 is connected to the water tank 17 and the metal pipe 16 respectively. The water tank 17 is used to store liquid and pump it into the metal pipe 16 through the pump device 18 to input the liquid into the inner side of the empty frame 61 and push the sliding plate 62. The same metal pipe 16 inputs liquid into the inner side of the two empty frames 61 so that after one sliding plate 62 stops moving, the other sliding plate 62 can still move to the clamping position.

[0032] The working principle of this embodiment is as follows: First, the part to be tested is placed on top of the test part 56 of the test piece holder 5. The pump device 18 inside the arc frame 54 is activated, and the liquid in the water tank 17 is transported through the metal pipe 16 to the empty frame 61 of the two sets of clamp parts 6. The liquid pushes the sliding plate 62 to move the clamping rod 63, so that the main clamping shaft 67 on the clamping frame 65 is in contact with the surface of the part to achieve initial positioning. Then, the electric cylinder 66 is activated to drive the side frame 68 to rotate through the fork frame 13 and the transmission pin 14, so that the auxiliary clamping shaft 69 is in contact with the part to form a three-point clamping. If the fit is insufficient, the clamping frame 65 can be rotated and The torsion spring is charged and ready to reset. To meet the multi-angle force requirements, the servo motor 10 on the auxiliary seat 9 is started. Through the meshing of the external gear 11 and the internal gear 12, the side frame 55 is driven to slide along the limiting slide frame 53, so that the arc frame 54 rotates along the force-bearing arc plate 52 to adjust the tilt angle of the part. The limiting slide frame 53 simultaneously plays a supporting and limiting role. Meanwhile, the two sets of vertically stacked electric guide rails 7 on the top of the base 2 can work together to drive the flat frame 8 and the support 51 to achieve horizontal and vertical displacement, thereby adjusting the relative position of the specimen seat 5 and the loading plate 4 to meet the force testing requirements of different parts of the part.

[0033] Example 2

[0034] refer to Figure 7-10 A multi-directional stress hardness testing structure for automotive prototype parts also includes a loading disk 4, wherein the loading disk 4 includes a stress inner ring 41, a sub-support 42 is slidably connected to the outer side of the stress inner ring 41, a loading module 43 is slidably connected to the outer side of the sub-support 42, a loading rod 44 is fixedly connected to the bottom of the loading module 43, and a pressure sensor is fixedly connected to the bottom of the loading rod 44. By setting the inner force ring 41 in conjunction with the sub-brackets 42, multiple positions for the loading modules 43 can be formed. The required number of loading modules 43 can be selected as needed and installed in different positions on different sub-brackets 42. At the same time, the position of the sub-brackets 42 can be adjusted along the inner force ring 41 to flexibly adjust the number and position of the loading pressure points, and the pressure is applied through the loading rod 44.

[0035] The loading module 43 has a friction pad 19 fixedly connected to its inner side, which contacts the sub-bracket 42. A mounting bolt 20 is threadedly connected to the top of the loading module 43. The bottom of the mounting bolt 20 passes through the friction pad 19 and the bottom of the loading module 43 and is threadedly connected to the loading rod 44. By using the friction pad 19, high friction prevents displacement of the loading module 43 when it is manually fixed to the outside of the sub-bracket 42. The mounting bolt 20 stably installs the loading module 43 on the outside of the sub-bracket 42, preventing it from loosening. A fastening screw 21 is threadedly connected to the top of the sub-bracket 42. The bottom of the fastening screw 21 is fixedly connected to the inner force-bearing ring 41. After the sub-support 42 slides along the inner force ring 41 to the desired position, the screw 21 can be tightened to press against the top of the inner force ring 41 to fix the position of the sub-support 42. The inner side of the inner force ring 41 is fixedly connected to the pressure plate 22. The top of the pressure plate 22 is connected to the telescopic end of the hydraulic device 3. The top of the pressure plate 22 is fixedly connected to the auxiliary frame 23. The bottom of the auxiliary frame 23 is connected to the auxiliary outer ring 24. The bottom of the auxiliary outer ring 24 is slidably connected to the top of the sub-support 42. The pressure plate 22 is used to connect to the pressure output end of the hydraulic device 3 and provide pressure to the entire loading plate 4. The auxiliary frame 23, together with the auxiliary outer ring 24, provides auxiliary support for the sub-support 42.

[0036] The working principle of this embodiment is as follows: The hydraulic device 3 transmits pressure to the entire loading plate 4 through the pressure plate 22. The auxiliary frame 23 and the auxiliary outer ring 24 cooperate to provide auxiliary support for the sub-support 42 to ensure stable pressure transmission. In use, the sub-support 42 can be slid along the inner ring 41 to the required position. Then, the sub-support 42 is fixed on the inner ring 41 by tightening the fastening screw 21. Then, according to the test requirements, an appropriate number of loading modules 43 are selected and installed in the corresponding positions of the sub-support 42. The friction pad 19 on the inner side of the loading module 43 can prevent displacement after installation through high friction. Then, the mounting bolt 20 passes through the friction pad 19 and the loading module 43 and is threadedly connected to the loading rod 44 to achieve a stable installation of the loading module 43. Finally, pressure is applied to the part through the loading rod 44. The pressure sensor at its bottom can monitor the pressure data in real time. The number and position of the loading pressure points can be changed as needed through the flexible adjustment of the sub-support 42 and the loading module 43.

[0037] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. Those skilled in the art can make modifications to this embodiment without contributing any inventive step after reading this specification. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-directional stress hardness testing structure for automotive prototype parts, comprising a frame (1) and a base (2) fixedly connected to the bottom of the frame (1), characterized in that: A hydraulic device (3) is fixedly connected to the top of the frame (1). A loading plate (4) is installed at the bottom of the telescopic end of the hydraulic device (3). A specimen seat (5) is provided on the top of the base (2). Two sets of clamping parts (6) are provided on the top of the specimen seat (5). The specimen holder (5) includes a support (51), a force-bearing arc plate (52) is fixedly connected to the top of the support (51), a limiting slide frame (53) is fixedly connected to both sides of the top of the support (51), an arc frame (54) is slidably connected to the top of the force-bearing arc plate (52), a side frame (55) is fixedly connected to both ends of the arc frame (54), the outer side of the side frame (55) is slidably connected to the inner side of the limiting slide frame (53), and a specimen part (56) is fixedly connected to the top of the arc frame (54). The clamping part (6) includes an empty frame (61), with two sets of empty frames (61) located on both sides of the specimen holder (5). A sliding plate (62) is slidably connected to the inner side of the empty frame (61). A clamping rod (63) is slidably connected to the side of the empty frame (61) near the support (51). The side of the clamping rod (63) near the sliding plate (62) is fixedly connected to the sliding plate (62). A rotating seat (64) is fixedly connected to the side of the clamping rod (63) away from the sliding plate (62). (64) A clamping frame (65) is rotatably connected to the side away from the clamping rod (63). An electric cylinder (66) is fixedly connected to the inner side of the clamping frame (65). A main clamping shaft (67) is rotatably connected to the side of the clamping frame (65) away from the rotating seat (64). Two side frames (68) are rotatably connected to the side of the clamping frame (65) away from the rotating seat (64). A secondary clamping shaft (69) is rotatably connected to the inner side of the side frames (68). A torsion spring is fixedly connected between the clamping frame (65) and the rotating seat (64).

2. The multi-directional stress hardness testing structure for automotive prototype parts according to claim 1, characterized in that: The top of the base (2) is provided with two sets of electric guide rails (7). The bottom of the bottom electric guide rail (7) is fixedly connected to the top of the base (2). The slide of the bottom electric guide rail (7) is fixedly connected to the bottom of the top electric guide rail (7). The slide of the top electric guide rail (7) is fixedly connected to a flat frame (8). The top of the flat frame (8) is fixedly connected to a support (51).

3. The multi-directional stress hardness testing structure for automotive prototype parts according to claim 1, characterized in that: A sub-seat (9) is fixedly connected to the left side of the support (51), a servo motor (10) is fixedly connected to the top of the sub-seat (9), an external gear (11) is fixedly connected to the output end of the servo motor (10), an internal gear (12) is fixedly connected to the left side of the left side frame (55), and the outer side of the external gear (11) and the internal gear (12) are meshed together.

4. The multi-directional stress hardness testing structure for automotive prototype parts according to claim 1, characterized in that: The telescopic end of the electric cylinder (66) is connected to a fork frame (13). Two transmission pins (14) are fixedly connected to the side of the fork frame (13) away from the electric cylinder (66). The top and bottom of the two transmission pins (14) are slidably connected to the inner side of the two side frames (68).

5. The multi-directional stress hardness testing structure for automotive prototype parts according to claim 1, characterized in that: Two side frames (55) are fixedly connected to connecting frames (15) on their outer sides. The two connecting frames (15) are fixedly connected to the two empty frames (61) on the side closest to the empty frame (61).

6. The multi-directional stress hardness testing structure for automotive prototype parts according to claim 1, characterized in that: The bottom of the empty frame (61) is fixedly connected to a metal pipe (16) by a sealing element. The inner side of the arc frame (54) is fixedly connected to a water tank (17) and a pump device (18). The pump device (18) is connected to the water tank (17) and the metal pipe (16) respectively.

7. The multi-directional stress hardness testing structure for automotive prototype parts according to claim 1, characterized in that: The loading disk (4) includes a force-bearing inner ring (41), a sub-branch (42) is slidably connected to the outer side of the force-bearing inner ring (41), a loading module (43) is slidably connected to the outer side of the sub-branch (42), a loading rod (44) is fixedly connected to the bottom of the loading module (43), and a pressure sensor is fixedly connected to the bottom of the loading rod (44).

8. The multi-directional stress hardness testing structure for automotive prototype parts according to claim 7, characterized in that: The inner side of the loading module (43) is fixedly connected to a friction pad (19), which is in contact with the sub-bracket (42). The top of the loading module (43) is threadedly connected to a mounting bolt (20), the bottom of which penetrates the friction pad (19) and the bottom of the loading module (43) and is threadedly connected to the loading rod (44).

9. A multi-directional stress hardness testing structure for automotive prototype parts according to claim 7, characterized in that: The top of the sub-bracket (42) is threaded with a fastening screw (21), and the bottom of the fastening screw (21) is fixedly connected to the inner ring (41) under force.

10. A multi-directional stress hardness testing structure for automotive prototype parts according to claim 7, characterized in that: The inner side of the inner ring (41) is fixedly connected to a pressure plate (22). The top of the pressure plate (22) is connected to the telescopic end of the hydraulic device (3). The top of the pressure plate (22) is fixedly connected to an auxiliary frame (23). The bottom of the auxiliary frame (23) is connected to an auxiliary outer ring (24). The bottom of the auxiliary outer ring (24) is slidably connected to the top of the sub-support (42).

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