Special auxiliary adjusting device for high-frequency fatigue testing machine

Abstract

The utility model belongs to the technical field of auxiliary devices of fatigue testing machines, and particularly relates to a special auxiliary adjusting device for a high-frequency fatigue testing machine. The bottom plate and the top plate are connected together through supporting columns, hydraulic machines are fixed to the bottom plate and the top plate respectively, a carrier plate is fixed to the upper pressing machines, and a sliding positioning connecting rod is arranged on the carrier plate and arranged outside the supporting columns in a sleeving mode. The limiting rod is provided with a scale groove and an auxiliary adjusting mechanism. A mounting seat is arranged on the carrier plate, and a mounting groove is formed in the mounting seat; according to the utility model, the situation that the output end of the hydraulic machine is excessively shrunk to cause instant pull-apart of a workpiece during shrinkage can be avoided, and meanwhile, the movable lengths of the four groups of limiting rods are kept consistent, so that the situation of non-uniform stress is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of auxiliary devices for fatigue testing machines, and in particular relates to a special auxiliary regulating device for high-frequency fatigue testing machines. Background Art

[0002] High-frequency fatigue testing machine is used to measure the fatigue characteristics, fatigue life, pre-crack and crack propagation tests of metals, alloy materials and their components (such as operating joints, fasteners, spiral moving parts, etc.) under tension, compression or tension-compression alternating loads at room temperature. When in use, the two ends of the workpiece to be tested are generally fixed between the upper and lower plates of the testing machine, and then the workpiece is subjected to extrusion and tension tests through the hydraulic press on the top.

[0003] At the same time, in the actual testing process, there are not only static load tests but also dynamic load tests. The dynamic load test is to keep the expansion and contraction frequency of the hydraulic press unchanged while changing the force to simulate the actual stress condition of the workpiece in the actual use scenario, so as to reflect the strength and toughness of the workpiece. Therefore, in order to avoid the workpiece from breaking directly under the instantaneous action of a certain pulling force during the fatigue test, limit screws are usually installed between the upper and lower plates of the testing machine to avoid excessive stretching. In actual installation, four sets of screws are generally installed at the four corners, but the installation process is visually inspected by the operator, and the effective active lengths of the four sets of screws cannot be guaranteed to be the same. This causes uneven force on the four screws during actual stretching, which affects the test results. Long-term use can also easily cause the output end of the hydraulic press to bend and deform. Summary of the invention

[0004] In order to overcome the above problems, the utility model provides a special auxiliary adjustment device for a high-frequency fatigue testing machine, which prevents the output end of the hydraulic press from contracting excessively during contraction, causing the workpiece to be instantly torn off. At the same time, the movable lengths of the four groups of limit rods remain consistent, avoiding uneven force.

[0005] A special auxiliary adjustment device for a high-frequency fatigue testing machine comprises a bottom plate 1, a support column 2, a top plate 3, an upper hydraulic press 4, a lower hydraulic press 5, an upper loading plate 7, a downloading plate 6, a limit rod 8 and an auxiliary adjustment mechanism 18, wherein the left and right sides between the bottom plate 1 and the top plate 3 are respectively connected together through the support column 2, and the upper hydraulic press 4 is fixed to the bottom of the top plate 3, the upper loading plate 7 is fixed to the output end of the upper hydraulic press 4, and the left and right sides of the upper loading plate 7 are respectively provided with sliding positioning connecting rods 9, and the outer side of the sliding positioning connecting rod 9 is sleeved outside the corresponding support column 2; the bottom plate 1 is fixed with a lower hydraulic press 5, wherein the downloading plate 6 is fixed to the output end of the lower hydraulic press 5, the limit rod 8 passes through the upper loading plate 7 and the downloading plate 6 in sequence, and the bottom thereof is matched with the bottom of the downloading plate 6, and the outer wall of the limit rod 8 located above the upper loading plate 7 is provided with a scale groove 21;

[0006] The auxiliary adjustment mechanism 18 includes a fixed plate 181, an adjusting screw 182, a connecting turntable 183, a sliding plug rod 184 and a sliding baffle 185, wherein the fixed plate 181 is fixed to the top of the limiting rod 8, the sliding baffle 185 is sleeved on the outside of the limiting rod 8 located above the upper loading plate 7, and is located below the fixed plate 181, the bottom of the adjusting screw 182 is rotatably connected to the top of the fixed plate 181, the connecting turntable 183 is threadedly connected to the outside of the adjusting screw 182, the bottom of the sliding plug rod 184 is fixedly connected to the sliding baffle 185, and the top passes through the fixed plate 181 and is connected to the connecting turntable 183, and the outer part of the adjusting screw 182 above the connecting turntable 183 is threadedly connected with a positioning nut 22;

[0007] The upper loading plate 7 and the lower loading plate 6 are provided with a threaded groove 24 in the middle, each threaded groove 24 is threadedly connected with a mounting seat 25, a mounting groove 26 is provided above the mounting seat 25, and positioning bolt holes are provided on the mounting seat 25 on both sides of the mounting groove 26;

[0008] A connecting groove 10 is provided on the inner side of the sliding positioning connecting rod 9, and a sliding cover plate 13 is movably inserted into the inner wall of the connecting groove 10, and a rotating screw 14 is rotatably connected to the bottom of the connecting groove 10, and a connecting strip 15 is sleeved and threadedly connected to the outer side of the rotating screw 14, and positioning rods 16 are fixedly connected to the upper ends of both ends of the connecting strip 15; a connecting plate 17 is fixed to the side of the upper loading plate 7, and the connecting plate 17 is fitted in the connecting groove 10, and the positioning rod 16 passes through the connecting groove 10, the connecting plate 17 and the sliding cover plate 13 in sequence to connect the three together.

[0009] The four corners of the upper loading plate 7 and the downloading plate 6 are respectively provided with assembly grooves 23 for connecting the limiting rod 8. The limiting rod 8 passes through the assembly grooves 23 on the upper loading plate 7 and the downloading plate 6 in sequence, and the bottom is clamped on the downloading plate 6 through a positioning retaining ring 19 located at the bottom of the downloading plate 6.

[0010] A threaded through hole is provided at the bottom of the limit rod 8, a round hole for installing the limit rod 8 is provided in the positioning retaining ring 19, and a threaded through hole penetrating the positioning retaining ring 19 is provided in the positioning retaining ring 19, wherein the locking screw 20 passes through and is threadedly connected in the threaded through holes of the positioning retaining ring 19 and the limit rod 8 in sequence, thereby fixing the positioning retaining ring 19 and the limit rod 8.

[0011] A sliding groove 11 is provided in the sliding positioning connecting rod 9 outside the connecting groove 10 , and a sliding block 12 is slidably connected inside the sliding groove 11 . One end of a sliding cover plate 13 is inserted into the sliding groove 11 and fixed to the bottom of the sliding block 12 .

[0012] An opening is provided above the sliding positioning link 9 inside the connecting groove 10 , and the opening is communicated with the sliding groove 11 , so that the sliding block 12 is located in the opening.

[0013] Beneficial effects of the utility model:

[0014] The utility model can prevent the output end of the hydraulic press from contracting excessively during contraction, thereby preventing the workpiece from being instantly torn off. Meanwhile, the movable lengths of the four groups of limit rods are kept consistent, thereby preventing uneven force. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the inclination angle of the utility model.

[0018] Figure 3 It is a schematic diagram of the structure between the upload board and the download board of the utility model.

[0019] Figure 4 It is a schematic diagram of the auxiliary adjustment mechanism structure of the utility model.

[0020] Figure 5 It is a schematic diagram of the sliding positioning connecting rod structure of the utility model.

[0021] Figure 6 It is a schematic diagram of the structure of the download board of the utility model.

[0022] Among them: bottom plate 1, support column 2, top plate 3, upper hydraulic press 4, lower hydraulic press 5, download plate 6, upper loading plate 7, limit rod 8, sliding positioning connecting rod 9, connecting groove 10, slide groove 11, slider 12, sliding cover plate 13, rotating screw 14, connecting strip 15, positioning plug rod 16, connecting plate 17, auxiliary adjustment mechanism 18, fixed plate 181, adjusting screw 182, connecting turntable 183, sliding plug rod 184, sliding baffle 185, positioning baffle ring 19, locking screw 20. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0024] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0027] Example 1

[0028] A special auxiliary adjustment device for a high-frequency fatigue testing machine includes a bottom plate 1, a support column 2, a top plate 3, an upper hydraulic press 4, a lower hydraulic press 5, an upper loading plate 7, a lower loading plate 6, a limit rod 8, a sliding positioning connecting rod 9 and an auxiliary adjustment mechanism 18, wherein:

[0029] The left and right sides between the bottom plate 1 and the top plate 3 are connected together by support columns 2 (the top and bottom of the support columns 2 are fixed on the top plate 3 and the bottom plate 1 respectively), and an upper hydraulic press 4 is fixed to the bottom of the top plate 3, and an upper loading plate 7 is fixed to the output end of the upper hydraulic press 4, and sliding positioning connecting rods 9 are respectively provided on the left and right sides of the upper loading plate 7, and the outer sides of the sliding positioning connecting rods 9 are sleeved outside the corresponding support columns 2; a lower hydraulic press 5 is fixed to the bottom plate 1, wherein a downloading plate 6 is fixed to the output end of the lower hydraulic press 5, and the limit rod 8 passes through the upper loading plate 7 and the downloading plate 6 in sequence, and its bottom is matched with the bottom of the downloading plate 6, and the outer wall of the limit rod 8 located above the upper loading plate 7 is provided with a scale groove 21;

[0030] The auxiliary adjustment mechanism 18 includes a fixed plate 181, an adjusting screw 182, a connecting turntable 183, a sliding plug rod 184 and a sliding baffle 185, wherein the fixed plate 181 is fixed to the top of the limiting rod 8, the sliding baffle 185 is sleeved on the outside of the limiting rod 8 located above the upper loading plate 7, and is located below the fixed plate 181, the bottom of the adjusting screw 182 is rotatably connected to the top of the fixed plate 181, the connecting turntable 183 is threadedly connected to the outside of the adjusting screw 182, the bottom of the sliding plug rod 184 is fixedly connected to the sliding baffle 185, and the top passes through the fixed plate 181 and is fixed to the connecting turntable 183, and the outer part of the adjusting screw 182 above the connecting turntable 183 is threadedly connected with a positioning nut 22;

[0031] The upper loading plate 7 and the lower loading plate 6 are provided with a threaded groove 24 in the middle, each threaded groove 24 is threadedly connected with a mounting seat 25, a mounting groove 26 is provided above the mounting seat 25, and positioning bolt holes are provided on the mounting seat 25 on both sides of the mounting groove 26;

[0032] A connecting groove 10 is provided on the inner side of the sliding positioning connecting rod 9, and a sliding cover plate 13 is movably inserted into the inner wall of the connecting groove 10, and a rotating screw 14 is rotatably connected to the bottom of the connecting groove 10, and a connecting strip 15 is sleeved and threadedly connected to the outer side of the rotating screw 14, and positioning rods 16 are fixedly connected to the upper ends of both ends of the connecting strip 15; a connecting plate 17 is fixed to the side of the upper loading plate 7, and the connecting plate 17 is fitted in the connecting groove 10, and the positioning rod 16 passes through the connecting groove 10, the connecting plate 17 and the sliding cover plate 13 in sequence to connect the three together.

[0033] The sliding cover plate 13 has a limit stop inside, and the connecting plate 17 is inserted between the sliding cover plate 13 and the connecting groove 10. The positioning rod 16 is adjusted by rotating the screw 14 to connect the sliding cover plate 13 and the connecting plate 17 to prevent deflection; one form of movement is converted into another form of movement, and the mechanism is indirectly protected.

[0034] The four corners of the upper loading plate 7 and the downloading plate 6 are respectively provided with assembly grooves 23 for connecting the limiting rod 8. The limiting rod 8 passes through the assembly grooves 23 on the upper loading plate 7 and the downloading plate 6 in sequence, and the bottom is clamped on the downloading plate 6 through a positioning retaining ring 19 located at the bottom of the downloading plate 6.

[0035] A threaded through hole is provided at the bottom of the limit rod 8, a round hole for installing the limit rod 8 is provided in the positioning retaining ring 19, and a threaded through hole penetrating the positioning retaining ring 19 is provided in the positioning retaining ring 19, wherein the locking screw 20 passes through and is threadedly connected in the threaded through holes of the positioning retaining ring 19 and the limit rod 8 in sequence, thereby fixing the positioning retaining ring 19 and the limit rod 8.

[0036] A sliding groove 11 is provided in the sliding positioning connecting rod 9 outside the connecting groove 10 , and a sliding block 12 is slidably connected inside the sliding groove 11 . One end of a sliding cover plate 13 is inserted into the sliding groove 11 and fixed to the bottom of the sliding block 12 .

[0037] An opening is provided above the sliding positioning link 9 inside the connecting groove 10 , and the opening is communicated with the sliding groove 11 , so that the sliding block 12 is located in the opening.

[0038] When in use, firstly, two sets of mounting seats 25 are respectively threadedly connected to the opposite sides of the upper loading plate 7 and the downloading plate 6 (i.e., below the upper loading plate 7 and above the downloading plate 6), and then the upper and lower ends of the workpiece to be tested are respectively inserted into the mounting grooves 26 on the upper loading plate 7 and the downloading plate 6, and fixed by positioning bolts 27 respectively, and then the limiting rod 8 is inserted into the inside of the assembly groove 23 from the top of the upper loading plate 7, and the bottom end of the limiting rod 8 passes through the downloading plate 6, and then the positioning retaining ring 19 is movably sleeved on the outer surface of the bottom end of the limiting rod 8, and at this time, the locking screw 20 is threadedly connected to the side of the positioning retaining ring 19 to fix the limiting rod 8 and the downloading plate 6;

[0039] Then, by rotating the adjusting screw 182, the adjusting screw 182 is rotated on the top of the fixing plate 181, and the connecting turntable 183 moves downward on the outer surface of the adjusting screw 182. At this time, the connecting turntable 183 drives the sliding baffle 185 to slide downward on the outer surface of the scale groove 21 through the sliding plug rod 184, so that the sliding baffle 185 slides to the desired appropriate position. At this time, the positioning nut 22 is screwed downward so that the positioning nut 22 is against the upper surface of the connecting turntable 183. At this time, according to the corresponding scale position of the sliding baffle 185 The height displayed on the outer surface of the groove 21 is used to adjust the other three groups of auxiliary adjustment mechanisms 18, and finally the movable lengths of the four groups of limit rods 8 are kept consistent. At this time, the fatigue test is carried out by starting the upper hydraulic press 4. In this process, as the output end of the upper hydraulic press 4 moves up and down, the workpiece to be tested is repeatedly bent for fatigue testing. At the same time, the four groups of limit rods 8 effectively prevent the output end of the upper hydraulic press 4 from contracting excessively during contraction, causing the workpiece to be instantly torn apart. At the same time, the movable lengths of the four groups of limit rods 8 are kept consistent to avoid uneven force.

[0040] At the beginning of this process, the slider 12 is moved outward along the slide groove 11 through the opening above the sliding positioning link 9, so that the sliding cover plate 13 moves into the slide groove 11, and then the sliding positioning link 9 is pushed upward to make the connecting plate 17 enter the connecting groove 10. At this time, the slider 12 is pushed inward along the slide groove 11 to move the sliding cover plate 13 to the upper surface of the connecting plate 17, and then the rotating screw 14 is rotated to make the positioning rod 16 move upward and insert into the connecting plate 17 and the sliding cover plate 13 for limiting. At this time, as the output end of the upper hydraulic press 4 moves back and forth up and down, the sliding positioning links 9 on both sides of the upper loading plate 7 slide up and down along the support column 2 to limit the upper loading plate 7 to prevent it from deflecting.

[0041] Example 2

[0042] 1 main body component, including a bottom plate 1, a download plate 6 is fixedly installed in the middle of the upper surface of the bottom plate 1, support columns 2 are fixedly connected to both sides of the upper surface of the bottom plate 1, an upper hydraulic press 4 is fixedly installed on the top of the support column 2, and an upper loading plate 7 is fixedly installed at the output end of the upper hydraulic press 4;

[0043] 2 Limit rod and auxiliary adjustment mechanism:

[0044] The limit rod 8 is movably inserted between the download plate 6 and the upload plate 7, a positioning ring 19 is installed at the bottom end of the limit rod 8, a scale groove 21 is opened on the outer surface of the upper end of the limit rod 8, and an auxiliary adjustment mechanism 18 is fixedly connected to the top of the limit rod 8;

[0045] The auxiliary adjustment mechanism 18 includes a fixed plate 181, an adjusting screw 182, a connecting turntable 183, a sliding plug rod 184 and a sliding baffle 185. The adjusting screw 182 is rotatably connected to the top of the fixed plate 181, the connecting turntable 183 is threadedly connected to the outer surface of the adjusting screw 182, and the two ends of the sliding plug rod 184 are respectively fixedly connected between the connecting turntable 183 and the sliding baffle 185, the sliding plug rod 184 is movably inserted into the interior of the fixed plate 181, the fixed plate 181 is fixedly connected to the top of the limiting rod 8, the sliding baffle 185 is movably sleeved on the outer surface of the limiting rod 8, the outer surface of the adjusting screw 182 and located above the connecting turntable 183 is threadedly connected with a positioning nut 22, the internal thread of the positioning baffle ring 19 is threadedly connected with a locking screw 20, and the locking screw 20 passes through the bottom end of the limiting rod 8.

[0046] 3 Sliding positioning link:

[0047] Sliding positioning links 9 are installed on both sides of the upper loading plate 7, and the other end of the sliding positioning links 9 is movably sleeved on the outer surface of the supporting column 2. A connecting groove 10 is provided on the upper surface of the end of the sliding positioning links 9, and a connecting plate 17 is fixedly welded to the side of the upper loading plate 7. The connecting plate 17 is fixedly installed inside the connecting groove 10, and a sliding cover plate 13 is movably inserted on the inner side wall of the connecting groove 10. A sliding groove 11 is provided on the upper surface of the sliding positioning links 9, and a slider 12 is slidably connected to the inside of the sliding groove 11. The bottom end of the slider 12 is fixedly connected to the sliding cover plate 13, and a rotating screw 14 is rotatably connected to the lower surface of the connecting groove 10. A connecting strip 15 is threadedly connected to the outer surface of the rotating screw 14, and a positioning plug rod 16 is fixedly connected to the upper surfaces of both ends of the connecting strip 15, and the positioning plug rod 16 passes through the connecting groove 10, the connecting plate 17 and the sliding cover plate 13 in sequence.

[0048] 4 Download Board:

[0049] The outer surfaces of the download plate 6 and the upper loading plate 7 are provided with assembly grooves 23, and the two ends of the limit rod 8 are respectively inserted into the two groups of assembly grooves 23. The middle parts of the opposite sides of the download plate 6 and the upper loading plate 7 are provided with threaded grooves 24. The internal threads of the threaded grooves 24 are connected with mounting seats 25. The interior of the mounting seats 25 is provided with mounting grooves 26. The inner side walls of the mounting grooves 26 are installed with positioning bolts 27, which facilitate the installation of the workpiece to be tested between the upper loading plate 7 and the download plate 6.

[0050] By passing the limit rod 7 through the upper loading plate 7 and the downloading plate 6, and then movably sleeve the positioning retaining ring 19 on the outer surface of the bottom end of the limit rod 8, the locking screw 20 is threadedly connected to the side of the positioning retaining ring 19, and then the adjusting screw 182 is rotated to make the sliding baffle 185 slide downward on the outer surface of the scale groove 21, and the positioning nut 22 is screwed down. At this time, the other three groups of auxiliary adjustment mechanisms 18 are adjusted according to the height displayed by the sliding baffle 185 on the outer surface of the scale groove 21, and finally the movable lengths of the four groups of limit rods 8 are kept consistent.

[0051] The auxiliary adjustment mechanism 18 is used to accurately adjust the movable length of the middle portion of the limiting rod 8, so that the movable lengths of the four groups of limiting rods 8 remain consistent, thereby avoiding uneven force.

[0052] The sliding positioning connecting rods 9 on both sides of the upper loading plate 7 slide up and down along the supporting column 2 to limit the upper loading plate 7 to prevent it from deflecting.

[0053] By inserting the two ends of the workpiece to be tested into the interior of the mounting groove 26 and fixing it by the positioning bolts 27 , it is convenient to install and fix the workpiece to be tested.

[0054] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the protection scope of the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, any technician familiar with the technical field can make equivalent replacements or changes based on the technical scheme and the utility model concept of the present invention within the technical scope disclosed by the present invention. These simple variations all belong to the protection scope of the present invention.

[0055] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

[0056] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A special auxiliary adjustment device for a high-frequency fatigue testing machine, characterized in that: The invention comprises a bottom plate (1), a support column (2), a top plate (3), an upper hydraulic press (4), a lower hydraulic press (5), an upper loading plate (7), a lower loading plate (6), a limit rod (8) and an auxiliary adjustment mechanism (18), wherein the left and right sides between the bottom plate (1) and the top plate (3) are respectively connected together through the support column (2), and the top plate (3) is fixed with the upper hydraulic press (4) at the bottom, and the upper loading plate (7) is fixed on the output end of the upper hydraulic press (4), and the left side of the upper loading plate (7) is connected with the upper loading plate (7). The right two sides are respectively provided with sliding positioning connecting rods (9), and the outer sides of the sliding positioning connecting rods (9) are sleeved outside the corresponding supporting columns (2); a lower hydraulic press (5) is fixed on the bottom plate (1), wherein a download plate (6) is fixed on the output end of the lower hydraulic press (5); the limiting rod (8) passes through the upper loading plate (7) and the download plate (6) in sequence, and its bottom is matched with the bottom of the download plate (6); the outer wall of the limiting rod (8) located above the upper loading plate (7) is provided with a scale groove (21); The auxiliary adjustment mechanism (18) comprises a fixed plate (181), an adjustment screw (182), a connecting turntable (183), a sliding plug rod (184) and a sliding baffle (185), wherein the fixed plate (181) is fixed to the top of the limit rod (8), the sliding baffle (185) is sleeved on the outside of the limit rod (8) located above the upper loading plate (7) and is located below the fixed plate (181), the bottom of the adjustment screw (182) is rotatably connected to the top of the fixed plate (181), the connecting turntable (183) is threadedly connected to the outside of the adjustment screw (182), the bottom of the sliding plug rod (184) is fixedly connected to the sliding baffle (185), and the top passes through the fixed plate (181) and is connected to the connecting turntable (183), and the outside of the adjustment screw (182) above the connecting turntable (183) is threadedly connected to a positioning nut (22); The upper loading plate (7) and the lower loading plate (6) are both provided with a threaded groove (24) in the middle, each threaded groove (24) is threadedly connected with a mounting seat (25), a mounting groove (26) is provided above the mounting seat (25), and positioning bolt holes are respectively provided on the mounting seat (25) on both sides of the mounting groove (26); A connecting groove (10) is provided on the inner side of the sliding positioning connecting rod (9), a sliding cover plate (13) is movably inserted into the inner wall of the connecting groove (10), a rotating screw rod (14) is rotatably connected to the bottom of the connecting groove (10), a connecting strip (15) is sleeved on the outside of the rotating screw rod (14) and is threadedly connected, and positioning plug rods (16) are fixedly connected to the upper ends of both ends of the connecting strip (15); a connecting plate (17) is fixed to the side of the upper loading plate (7), the connecting plate (17) is fitted in the connecting groove (10), and the positioning plug rod (16) passes through the connecting groove (10), the connecting plate (17) and the sliding cover plate (13) in sequence to connect the three together.

2. The auxiliary adjustment device for high-frequency fatigue testing machine according to claim 1 is characterized in that: The four corners of the upper loading plate (7) and the downloading plate (6) are respectively provided with assembly grooves (23) for connecting the limiting rod (8); the limiting rod (8) passes through the assembly grooves (23) on the upper loading plate (7) and the downloading plate (6) in sequence, and the bottom is clamped on the downloading plate (6) through a positioning retaining ring (19) located at the bottom of the downloading plate (6).

3. The auxiliary adjustment device for high-frequency fatigue testing machine according to claim 1 is characterized in that: A threaded through hole is provided at the bottom of the limiting rod (8), a circular hole for installing the limiting rod (8) is provided in the positioning retaining ring (19), and a threaded through hole penetrating the positioning retaining ring (19) is provided in the positioning retaining ring (19), wherein a locking screw (20) passes through and is threadedly connected to the threaded through holes of the positioning retaining ring (19) and the limiting rod (8) in sequence, thereby fixing the positioning retaining ring (19) and the limiting rod (8).

4. The auxiliary adjustment device for high-frequency fatigue testing machine according to claim 1, characterized in that: A sliding groove (11) is provided in the sliding positioning connecting rod (9) outside the connecting groove (10), a sliding block (12) is slidably connected inside the sliding groove (11), and one end of the sliding cover plate (13) is inserted into the sliding groove (11) and fixed at the bottom of the sliding block (12).

5. The auxiliary adjustment device for high-frequency fatigue testing machine according to claim 4 is characterized in that: An opening is provided above the sliding positioning connecting rod (9) inside the connecting groove (10), and the opening is communicated with the sliding groove (11), so that the sliding block (12) is located in the opening.

Images