Three-axis loading machine

Abstract

The utility model relates to the technical field of pressing force detection, in particular to a triaxial loading machine which comprises a rack and a portal frame arranged on the rack. The rack is provided with a test board and a Y-direction driving assembly; the portal frame is provided with a lifting shaft and an X-direction driving assembly; the lifting shaft is provided with a driving shaft and a Z-direction driving assembly used for driving the driving shaft to move in the Z-axis direction. A pressure sensor is arranged at the bottom of the driving shaft; the pressure sensor is arranged at the top of the test board; the lifting shaft is provided with a stroke adjusting mechanism used for adjusting the stroke of the driving shaft. According to the utility model, the X-direction driving assembly drives the lifting shaft to move in the X-axis direction, the Y-direction driving assembly drives the test bench to move in the Y-axis direction, and the Z-direction driving assembly drives the driving shaft and the pressure sensor to descend, so that a to-be-tested area of a product is pressed, and a pressing force test is carried out on the product; in addition, by arranging the stroke adjusting mechanism, the stroke of the driving shaft and the pressure sensor can be conveniently adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to press force detection technical field, concretely relates to a three axle load machine. BACKGROUND

[0002] With the continuous improvement of production and manufacturing level, various kinds of electrical products (such as mobile phone, keyboard etc.) are constantly innovated, and the testing demand of various performances of new products is increasing day by day.In the press force test, it is usually necessary to drive the press rod and the pressure sensor to lift and lower. In order to avoid the press rod and the pressure sensor from lifting and lowering excessively, the existing technical solution is to set two upper and lower sensing switches. However, this method has the following obvious deficiencies: the sensing switch needs to be accurately aligned during installation, and the installation environment and installation technology are required to be high, and at the same time, due to the complexity of the structure of the test equipment, it is difficult to find a suitable installation position for the sensing switch, which increases the time cost and technical difficulty of installation. SUMMARY

[0003] The utility model aims at the above -mentioned insufficient of prior art, provides a three axle load machine.

[0004] The utility model discloses a three axle load machine, including frame and being located in the portal frame of frame, the frame is equipped with test table and is used for driving test table along Y axle direction Y -direction drive assembly, the portal frame is equipped with lifting shaft and is used for driving lifting shaft along X axle direction X -direction drive assembly, the lifting shaft is equipped with drive shaft and is used for driving drive shaft along Z axle direction Z -direction drive assembly, the bottom of drive shaft is equipped with pressure sensor, and the pressure sensor is located at the top of test table,

[0005] The lifting shaft is equipped with stroke adjusting mechanism for adjusting the stroke of the drive shaft.

[0006] The utility model further sets up, the stroke adjusting mechanism includes movable rod, bottom plate and top plate that are equipped with along Z axle direction in the lifting shaft, the movable rod is movably arranged between the top plate and the bottom plate;

[0007] The movable rod is detachably connected with the upper limit block and the lower limit block, the stroke adjusting mechanism further includes a knob block movably arranged between the upper limit block and the lower limit block, and the knob block is connected with the Z -direction drive assembly.

[0008] The utility model further sets up, the stroke adjusting mechanism further includes a middle plate equipped with the lifting shaft, the middle plate is arranged between the bottom plate and the top plate, the upper limit block is arranged at the bottom of the middle plate, the lower limit block is arranged at the top of the bottom plate, and the movable rod is arranged through the middle plate.

[0009] The stroke adjusting mechanism further comprises a sensing rod arranged along the Z-axis direction of the lifting shaft; the sensing rod is arranged between the top plate and the middle plate; the top of the sensing rod is provided with an upper sensing switch; the bottom of the sensing rod is provided with a lower sensing switch; the movable rod is provided with a sensing column; and the sensing column is arranged between the top plate and the middle plate.

[0010] The utility model further sets up, upper limit block, lower limit block and sensing column are respectively set in movable rod outside, the outer wall of upper limit block, the outer wall of lower limit block and the outer wall of sensing column are respectively equipped with fixed hole, the fixed hole is connected with bolt for with movable rod abutting.

[0011] The utility model further sets up, movable rod with middle plate between is equipped with friction sleeve.

[0012] The utility model further sets up, Z direction drive assembly includes the Z direction slide rail of being arranged in the lifting shaft, the Z direction sliding seat of sliding being equipped with in Z direction slide rail, the Z direction lead screw of rotation being equipped with in lifting shaft, the Z direction nut of being set in Z direction lead screw and the Z direction motor of being arranged in lifting shaft, Z direction motor's output and Z direction lead screw are connected, Z direction nut is equipped with Z direction sliding seat,

[0013] Z direction sliding seat is connected with the top of driving shaft, and the knob is connected with Z direction sliding seat.

[0014] The utility model further sets up, X direction drive assembly includes the X direction slide rail of being arranged in gantry, the X direction sliding seat of sliding being equipped with in X direction slide rail, the X direction lead screw of rotation being equipped with in gantry, the X direction nut of being set in X direction lead screw and the X direction motor of being arranged in gantry, X direction motor's output and X direction lead screw are connected, X direction nut is equipped with X direction sliding seat, and the lifting shaft is equipped with X direction sliding seat.

[0015] Y direction drive assembly includes the Y direction slide rail of being arranged in rack, the Y direction sliding seat of sliding being equipped with in Y direction slide rail, the Y direction lead screw of rotation being equipped with in rack, the Y direction nut of being set in Y direction lead screw and the Y direction motor of being arranged in rack, Y direction motor's output and Y direction lead screw are connected, Y direction nut is equipped with Y direction sliding seat, and the test bench is equipped with Y direction sliding seat.

[0016] The utility model further sets up, the lifting shaft is equipped with dust cover.

[0017] The utility model further sets up, the portal frame is equipped with X direction top cover, X direction top cover is opened with X direction slot, X direction sliding seat is equipped with X direction connecting seat, X direction sliding seat passes through X direction connecting seat and is connected with lifting shaft, X direction connecting seat is arranged in X direction slot, X direction slot is equipped with X direction dustproof steel band, one end of X direction connecting seat is equipped with first X direction magnetic piece, the other end of X direction connecting seat is equipped with second X direction magnetic piece, the middle part of X direction connecting seat is equipped with X direction arc surface.

[0018] The utility model further sets up, the rack is equipped with Y direction top cover, Y direction top cover is opened with Y direction slot, Y direction sliding seat is equipped with Y direction connecting seat, Y direction sliding seat passes through Y direction connecting seat and is connected with test bench, Y direction connecting seat is arranged in Y direction slot, Y direction slot is equipped with Y direction dustproof steel band, one end of Y direction connecting seat is equipped with first Y direction magnetic piece, the other end of Y direction connecting seat is equipped with second Y direction magnetic piece, the middle part of Y direction connecting seat is equipped with Y direction arc surface.

[0019] The utility model has the advantages that the utility model moves lifting shaft in X axle direction through X direction drive assembly, moves test bench in Y axle direction through Y direction drive assembly, drives drive shaft and pressure sensor to descend through Z direction drive assembly, thereby presses the region of product to be measured, and carries out the pressing force test to product, in addition, through setting stroke adjusting mechanism, the stroke of drive shaft and pressure sensor can be adjusted conveniently. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model is further explained by the drawings, but the embodiment in the drawings does not constitute any limitation to the utility model, and other drawings can be obtained according to the following drawings without the creative labor of the ordinary skill in the art.

[0021] Figure 1 It is the structure schematic diagram of the utility model;

[0022] Figure 2 It is the structure schematic diagram of the utility model lifting shaft hidden dust cover after;

[0023] Figure 3 It is Figure 2 The partial close -up of A part in;

[0024] Figure 4 It is the structure schematic diagram of the utility model lifting shaft and X direction drive assembly cooperation;

[0025] Figure 5 It is the structure schematic diagram of the utility model X direction drive assembly;

[0026] Figure 6 It is the structure schematic diagram of the utility model X direction drive assembly hidden X direction top cover after;

[0027] Figure 7 This is a schematic diagram of the structure of the test bench and the Y-axis drive assembly of the utility model;

[0028] Figure 8 This is a schematic structural diagram of the Y-axis drive assembly of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the utility model after the Y-direction drive assembly hides the Y-direction top cover;

[0030] Among them: 1. Frame; 11. Test bench; 12. Y-axis slide; 13. Y-axis slide; 14. Y-axis lead screw; 15. Y-axis nut; 16. Y-axis motor; 2. Gantry; 21. X-axis slide; 22. X-axis slide; 23. X-axis lead screw; 24. X-axis nut; 25. X-axis motor; 3. Lifting shaft; 31. Z-axis slide; 32. Z-axis slide; 33. Z-axis lead screw; 34. Z-axis nut; 35. Z-axis motor; 36. Dust cover; 41. Drive shaft; 42. Pressure sensor; 51. Bottom plate; 52. Top plate; 53. Middle plate; 54. Induction Rod; 55, upper sensing switch; 56, lower sensing switch; 6, movable rod; 61, upper limit block; 62, lower limit block; 63, toggle block; 64, sensing column; 65, fixing hole; 7, X-axis top cover; 71, X-axis slot; 72, X-axis connecting seat; 73, X-axis dustproof steel belt; 74, first X-axis magnetic part; 75, second X-axis magnetic part; 76, X-axis curved surface; 8, Y-axis top cover; 81, Y-axis slot; 82, Y-axis connecting seat; 83, Y-axis dustproof steel belt; 84, first Y-axis magnetic part; 85, second Y-axis magnetic part; 86, Y-axis curved surface. DETAILED DESCRIPTION

[0031] The present invention will be further described with reference to the following embodiments.

[0032] Depend on Figures 1 to 9 It can be seen that the three-axis load machine described in this embodiment includes a frame 1 and a gantry 2 provided on the frame 1; the frame 1 is provided with a test bench 11 and a Y-direction drive assembly for driving the test bench 11 to move along the Y-axis direction; the gantry 2 is provided with a lifting shaft 3 and an X-direction drive assembly for driving the lifting shaft 3 to move along the X-axis direction; the lifting shaft 3 is provided with a drive shaft 41 and a Z-direction drive assembly for driving the drive shaft 41 to move along the Z-axis direction; a pressure sensor 42 is provided at the bottom of the drive shaft 41; and the pressure sensor 42 is provided on the top of the test bench 11;

[0033] The lifting shaft 3 is provided with a stroke adjustment mechanism for adjusting the stroke of the driving shaft 41 .

[0034] Specifically, the triaxial loading machine in the embodiment is used as follows: first, the product is placed on the test table 11, then the X-direction driving assembly drives the lifting shaft 3 to move in the X-axis direction, the Y-direction driving assembly drives the test table 11 to move in the Y-axis direction, so that the driving shaft 41 is arranged directly above the region to be tested of the product, then the Z-direction driving assembly drives the driving shaft 41 and the pressure sensor 42 to descend, so as to press the region to be tested of the product and test the pressing force of the product; in addition, the stroke adjusting mechanism is arranged, so that the stroke of the driving shaft 41 and the pressure sensor 42 can be adjusted conveniently.

[0035] The triaxial loading machine in the embodiment, the stroke adjusting mechanism comprises the movable rod 6 arranged along the Z-axis direction on the lifting shaft 3, the bottom plate 51 arranged on the lifting shaft 3 and the top plate 52 arranged on the lifting shaft 3; the movable rod 6 is movably arranged between the top plate 52 and the bottom plate 51; the movable rod 6 is detachably connected with the upper limiting block 61 and the lower limiting block 62; the stroke adjusting mechanism further comprises the knob 63 movably arranged between the upper limiting block 61 and the lower limiting block 62; the knob 63 is connected with the Z-direction driving assembly. The triaxial loading machine in the embodiment, the stroke adjusting mechanism further comprises the middle plate 53 arranged on the lifting shaft 3; the middle plate 53 is arranged between the bottom plate 51 and the top plate 52; the upper limiting block 61 is arranged at the bottom of the middle plate 53; the upper limiting block 61 is arranged at the top of the bottom plate 51; the movable rod 6 is arranged through the middle plate 53; the stroke adjusting mechanism further comprises the sensing rod 54 arranged along the Z-axis direction on the lifting shaft 3; the sensing rod 54 is arranged between the top plate 52 and the middle plate 53; the top of the sensing rod 54 is provided with the upper sensing switch 55; the bottom of the sensing rod 54 is provided with the lower sensing switch 56; the movable rod 6 is provided with the sensing column 64; the sensing column 64 is arranged between the top plate 52 and the middle plate 53.

[0036] Specifically, when the stroke of the movable rod 6 needs to be adjusted, only the positions of the upper limit block 61 and the lower limit block 62 need to be changed; when the Z-direction sliding seat 32 moves upward, the driving block 63 is driven to move upward until the driving block 63 abuts against the upper limit block 61, and then the driving block 63 pushes the upper limit block 61 to move upward, i.e. drives the movable rod 6 to move upward, so that the sensing column 64 moves upward; when the Z-direction sliding seat 32 moves downward, the driving block 63 is driven to move downward until the driving block 63 abuts against the lower limit block 62, and then the driving block 63 pushes the lower limit block 62 to move downward, i.e. drives the movable rod 6 to move downward, so that the sensing column 64 moves downward; when the lower limit block 62 is sensed by the lower sensing switch 56, the Z-direction sliding seat 32 stops descending; through the above arrangement, the upper sensing switch 55 and the lower sensing switch 56 do not need to be disassembled, and only the positions of the upper limit block 61 and the lower limit block 62 need to be changed to adjust the stroke of the movable rod 6, which is convenient to use.

[0037] The three-axis load machine provided in the embodiment, the upper limit block 61, the lower limit block 62 and the sensing column 64 are respectively sleeved on the movable rod 6; the outer wall of the upper limit block 61, the outer wall of the lower limit block 62 and the outer wall of the sensing column 64 are respectively provided with a fixing hole 65; the fixing hole 65 is threadedly connected with a bolt for abutting against the movable rod 6. The bolt is not shown in the figure; through the above arrangement, the upper limit block 61, the lower limit block 62 and the sensing column 64 can be fixed on the movable rod 6 through the bolt.

[0038] The three-axis load machine provided in the embodiment, the movable rod 6 and the middle plate 53 are provided with a friction sleeve. The friction sleeve is not shown in the figure; through the above arrangement, the movable rod 6 is prevented from falling off.

[0039] The three-axis load machine provided in the embodiment, the Z-direction driving assembly comprises a Z-direction sliding rail 31 arranged on the lifting shaft 3, a Z-direction sliding seat 32 slidingly arranged on the Z-direction sliding rail 31, a Z-direction lead screw 33 rotatably arranged on the lifting shaft 3, a Z-direction nut 34 sleeved on the Z-direction lead screw 33 and a Z-direction motor 35 arranged on the lifting shaft 3; the output end of the Z-direction motor 35 is connected with the Z-direction lead screw 33; the Z-direction nut 34 is arranged on the Z-direction sliding seat 32; the Z-direction sliding seat 32 is connected with the top of the driving shaft 41; the driving block 63 is connected with the Z-direction sliding seat 32. Specifically, the Z-direction motor 35 is started to drive the Z-direction lead screw 33 to rotate, so that the Z-direction sliding seat 32 is lifted along the Z-direction sliding rail 31, thereby driving the driving shaft 41 and the pressure sensor 42 to be lifted.

[0040] The three-axis load machine provided by the embodiment comprises an X-direction driving assembly, a Y-direction driving assembly and a Z-direction driving assembly, wherein the X-direction driving assembly comprises an X-direction sliding rail 21 arranged on the portal frame 2, an X-direction sliding seat 22 slidingly arranged on the X-direction sliding rail 21, an X-direction lead screw 23 rotatably arranged on the portal frame 2, an X-direction nut 24 sleeved on the X-direction lead screw 23 and an X-direction motor 25 arranged on the portal frame 2; the output end of the X-direction motor 25 is connected with the X-direction lead screw 23; the X-direction nut 24 is arranged on the X-direction sliding seat 22; the lifting shaft 3 is arranged on the X-direction sliding seat 22; specifically, the Y-direction motor 16 is started to drive the Y-direction lead screw 14 to rotate, so that the Y-direction sliding seat 13 moves along the Y-direction sliding rail 12 in the Y-axis direction, thereby driving the lifting shaft 3 to move in the Y-axis direction.

[0041] The Y-direction driving assembly comprises a Y-direction sliding rail 12 arranged on the rack 1, a Y-direction sliding seat 13 slidingly arranged on the Y-direction sliding rail 12, a Y-direction lead screw 14 rotatably arranged on the rack 1, a Y-direction nut 15 sleeved on the Y-direction lead screw 14 and a Y-direction motor 16 arranged on the rack 1; the output end of the Y-direction motor 16 is connected with the Y-direction lead screw 14; the Y-direction nut 15 is arranged on the Y-direction sliding seat 13; the test bench 11 is arranged on the Y-direction sliding seat 13. Specifically, the X-direction motor 25 is started to drive the X-direction lead screw 23 to rotate, so that the X-direction sliding seat 22 moves along the X-direction sliding rail 21 in the X-axis direction, thereby driving the test bench 11 to move in the Y-axis direction.

[0042] The three-axis load machine provided by the embodiment comprises an X-direction driving assembly, a Y-direction driving assembly and a Z-direction driving assembly, wherein the X-direction driving assembly comprises an X-direction sliding rail 21 arranged on the portal frame 2, an X-direction sliding seat 22 slidingly arranged on the X-direction sliding rail 21, an X-direction lead screw 23 rotatably arranged on the portal frame 2, an X-direction nut 24 sleeved on the X-direction lead screw 23 and an X-direction motor 25 arranged on the portal frame 2; the output end of the X-direction motor 25 is connected with the X-direction lead screw 23; the X-direction nut 24 is arranged on the X-direction sliding seat 22; the lifting shaft 3 is arranged on the X-direction sliding seat 22; specifically, the Y-direction motor 16 is started to drive the Y-direction lead screw 14 to rotate, so that the Y-direction sliding seat 13 moves along the Y-direction sliding rail 12 in the Y-axis direction, thereby driving the lifting shaft 3 to move in the Y-axis direction.

[0043] The three-axis load machine provided by the embodiment comprises an X-direction driving assembly, a Y-direction driving assembly and a Z-direction driving assembly, wherein the X-direction driving assembly comprises an X-direction sliding rail 21 arranged on the portal frame 2, an X-direction sliding seat 22 slidingly arranged on the X-direction sliding rail 21, an X-direction lead screw 23 rotatably arranged on the portal frame 2, an X-direction nut 24 sleeved on the X-direction lead screw 23 and an X-direction motor 25 arranged on the portal frame 2; the output end of the X-direction motor 25 is connected with the X-direction lead screw 23; the X-direction nut 24 is arranged on the X-direction sliding seat 22; the lifting shaft 3 is arranged on the X-direction sliding seat 22; specifically, the Y-direction motor 16 is started to drive the Y-direction lead screw 14 to rotate, so that the Y-direction sliding seat 13 moves along the Y-direction sliding rail 12 in the Y-axis direction, thereby driving the lifting shaft 3 to move in the Y-axis direction.

[0044] The three-axle load machine has the Y-direction top cover 8, the Y-direction top cover 8 is provided with the Y-direction slot 81, the Y-direction sliding seat 13 is provided with the Y-direction connecting seat 82, the Y-direction sliding seat 13 is connected with the test table 11 through the Y-direction connecting seat 82, the Y-direction connecting seat 82 is movably arranged in the Y-direction slot 81, the Y-direction slot 81 is provided with the Y-direction dustproof steel belt 83, one end of the Y-direction connecting seat 82 is provided with the first Y-direction magnetic member 84, the other end of the Y-direction connecting seat 82 is provided with the second Y-direction magnetic member 85, and the middle part of the Y-direction connecting seat 82 is provided with the Y-direction arc surface 86. Specifically, the first Y-direction magnetic member 84 and the second Y-direction magnetic member 85 are respectively attracted to the Y-direction dustproof steel belt 83, so that the Y-direction dustproof steel belt 83 on the Y-direction connecting seat 82 is protruded upward during the movement of the Y-direction connecting seat 82 and is attached to the Y-direction arc surface 86, thereby achieving excellent dustproof effect.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited to the scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the present application.

Claims

1. A tri-axle load carrier characterised in that: The machine frame is provided with a test table and a Y-direction driving assembly for driving the test table to move along the Y-axis direction; the gantry is provided with a lifting shaft and an X-direction driving assembly for driving the lifting shaft to move along the X-axis direction; the lifting shaft is provided with a driving shaft and a Z-direction driving assembly for driving the driving shaft to move along the Z-axis direction; the bottom of the driving shaft is provided with a pressure sensor; the pressure sensor is arranged on the top of the test table; The lifting shaft is provided with a stroke adjusting mechanism for adjusting the stroke of the driving shaft.

2. The tri-axial load machine of claim 1, wherein: The stroke adjusting mechanism comprises a movable rod arranged on the lifting shaft along the Z-axis direction, a bottom plate arranged on the lifting shaft, and a top plate arranged on the lifting shaft; the movable rod is movably arranged between the top plate and the bottom plate; The movable rod is detachably connected with an upper limiting block and a lower limiting block; the stroke adjusting mechanism further comprises a push block movably arranged between the upper limiting block and the lower limiting block; the push block is connected with the Z-direction driving assembly.

3. A tri-axial load machine as claimed in claim 2, wherein: The stroke adjusting mechanism further comprises a middle plate arranged on the lifting shaft; the middle plate is arranged between the bottom plate and the top plate; the upper limiting block is arranged at the bottom of the middle plate; the lower limiting block is arranged at the top of the bottom plate; the movable rod passes through the middle plate; The stroke adjusting mechanism further comprises a sensing rod arranged on the lifting shaft along the Z-axis direction; the sensing rod is arranged between the top plate and the middle plate; the top of the sensing rod is provided with an upper sensing switch; the bottom of the sensing rod is provided with a lower sensing switch; the movable rod is provided with a sensing column; the sensing column is arranged between the top plate and the middle plate.

4. The tri-axial load machine of claim 3, wherein: The upper limiting block, the lower limiting block, and the sensing column are respectively sleeved on the outside of the movable rod; the outer wall of the upper limiting block, the outer wall of the lower limiting block, and the outer wall of the sensing column are respectively provided with fixing holes; the fixing holes are threadedly connected with bolts for abutting against the movable rod.

5. The tri-axial load machine of claim 3, wherein: A friction sleeve is arranged between the movable rod and the middle plate.

6. The tri-axial load machine of claim 3, wherein: The Z-direction driving assembly comprises a Z-direction sliding rail arranged on the lifting shaft, a Z-direction sliding seat slidingly arranged on the Z-direction sliding rail, a Z-direction lead screw rotatably arranged on the lifting shaft, a Z-direction nut sleeved on the Z-direction lead screw, and a Z-direction motor arranged on the lifting shaft; the output end of the Z-direction motor is connected with the Z-direction lead screw; the Z-direction nut is arranged on the Z-direction sliding seat; The Z-direction sliding seat is connected with the top of the driving shaft; the push block is connected with the Z-direction sliding seat.

7. The tri-axial load machine of claim 1, wherein: The X-direction driving assembly comprises an X-direction sliding rail arranged on the gantry, an X-direction sliding seat slidingly arranged on the X-direction sliding rail, an X-direction lead screw rotatably arranged on the gantry, an X-direction nut sleeved on the X-direction lead screw, and an X-direction motor arranged on the gantry; the output end of the X-direction motor is connected with the X-direction lead screw; the X-direction nut is arranged on the X-direction sliding seat; the lifting shaft is arranged on the X-direction sliding seat; The Y-direction driving assembly comprises a Y-direction sliding rail arranged on the machine frame, a Y-direction sliding seat slidingly arranged on the Y-direction sliding rail, a Y-direction lead screw rotatably arranged on the machine frame, a Y-direction nut sleeved on the Y-direction lead screw, and a Y-direction motor arranged on the machine frame; the output end of the Y-direction motor is connected with the Y-direction lead screw; the Y-direction nut is arranged on the Y-direction sliding seat; the test table is arranged on the Y-direction sliding seat.

8. The tri-axial load machine of claim 1, wherein: The lifting shaft is sleeved with a dust cover.

9. The tri-axial load machine of claim 7, wherein: The portal frame is provided with an X-direction top cover; the X-direction top cover is provided with an X-direction slot; the X-direction sliding seat is provided with an X-direction connecting seat; the X-direction sliding seat is connected with the lifting shaft through the X-direction connecting seat; the X-direction connecting seat is movably arranged in the X-direction slot; the X-direction slot is provided with an X-direction dustproof steel belt; one end of the X-direction connecting seat is provided with a first X-direction magnetic member; the other end of the X-direction connecting seat is provided with a second X-direction magnetic member; and the middle part of the X-direction connecting seat is provided with an X-direction arc surface.

10. The tri-axial load machine of claim 7, wherein: The rack is provided with a Y-direction top cover; the Y-direction top cover is provided with a Y-direction slot; the Y-direction sliding seat is provided with a Y-direction connecting seat; the Y-direction sliding seat is connected with the test table through the Y-direction connecting seat; the Y-direction connecting seat is movably arranged in the Y-direction slot; the Y-direction slot is provided with a Y-direction dustproof steel belt; one end of the Y-direction connecting seat is provided with a first Y-direction magnetic member; the other end of the Y-direction connecting seat is provided with a second Y-direction magnetic member; and the middle part of the Y-direction connecting seat is provided with a Y-direction arc surface.

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