Full-automatic direct shear apparatus

Abstract

The utility model provides a full-automatic direct shear apparatus. The full-automatic direct shear apparatus comprises a working rack; the shearing box comprises an upper shearing box and a lower shearing box which are sequentially arranged on the working rack from top to bottom; at least one part of the pressing plate can extend into the shear box; the lifting mechanism comprises a supporting plate, the supporting plate is contained in the lower shear box in a lifting mode, the pressing plate is located above the supporting plate, and a space used for containing samples is formed between the part, located in the shear box, of the pressing plate and the supporting plate; the stopping mechanism is arranged on the working rack and abuts against the upper shear box; the horizontal driving mechanism is arranged on the working rack and is in driving connection with the lower shearing box, so that the lower shearing box can horizontally move on the working rack; and the vertical driving mechanism abuts against the pressing plate, applies vertical pressure to the sample and is in sliding connection with the working rack. According to the utility model, the shear surface of a sample can be changed in the shear box, and the problems of low efficiency and poorer effect of a direct shear test in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering equipment, and particularly relates to a full-automatic direct shear apparatus. Background Art

[0002] Soil is an indispensable part of nature. Studying the properties of soil is of great significance in engineering applications. The test methods for measuring the shear strength of soil include laboratory tests and in-situ tests. Laboratory test methods include triaxial shear test, direct shear test, unconfined compression test, etc., and in-situ tests include vane shear test method, etc. Among them, the direct shear test in laboratory tests is an earlier developed test method. Its principle is to apply a horizontal shear force along a fixed shear plane to multiple specimens of the same soil sample under different vertical pressures to obtain the value of the shear force, and then obtain the shear strength according to Coulomb's law.

[0003] The direct shear test needs to be completed by a direct shear apparatus. Currently, common direct shear apparatuses include single-hand manual direct shear apparatus, electric four-link direct shear apparatus, full-automatic strain-controlled direct shear test instrument, and electric servo full-automatic direct shear apparatus. The single-hand manual direct shear apparatus depends on the proficiency of the operator, and this method has problems of time-consuming, laborious, and easy reading errors. Although the electric four-link direct shear apparatus can improve the test efficiency, it still requires manual addition of weights to provide vertical pressure, which is time-consuming and laborious. The full-automatic strain-controlled direct shear test instrument has a large volume and complex structure. The electric servo full-automatic direct shear apparatus can only measure one test data for one specimen each time, and the test efficiency is low. No matter which direct shear apparatus, at least 4 specimens are required, and the homogeneity of multiple specimens is difficult to control, resulting in large discreteness of shear values and even failure of the direct shear test. As can be seen from the above, there are problems of low efficiency and poor effect in the direct shear test in the prior art. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a full-automatic direct shear apparatus to solve the problems of low efficiency and poor effect in the direct shear test in the prior art.

[0005] To achieve the above object, the present utility model provides a full-automatic direct shear apparatus, comprising: a workbench frame; a shear box, the shear box including an upper shear box and a lower shear box which are sequentially arranged on the workbench frame from top to bottom; a pressing plate, at least a part of the pressing plate being capable of extending into the shear box; a lifting mechanism, the lifting mechanism including a supporting plate which is liftably accommodated in the lower shear box, and the pressing plate being located above the supporting plate, a space for accommodating a sample being formed between the part of the pressing plate located in the shear box and the supporting plate; a stop mechanism, the stop mechanism being arranged on the workbench frame and abutting against the upper shear box; a horizontal driving mechanism, the horizontal driving mechanism being arranged on the workbench frame and drivingly connected to the lower shear box so that the lower shear box can horizontally move on the workbench frame; a vertical driving mechanism, the vertical driving mechanism being drivingly connected to the pressing plate to apply pressure to the sample.

[0006] Further, the lifting mechanism further includes a first driving member which is drivingly connected to the bottom of the supporting plate for adjusting the position of the supporting plate in the lower shear box.

[0007] Further, the workbench frame has an avoidance opening, at least a part of the first driving member being located below the workbench frame, and the supporting plate passing through the avoidance opening and being located in the lower shear box.

[0008] Further, the direct shear apparatus lifting mechanism further includes a connecting frame which is slidably arranged below the workbench frame, and the first driving member is arranged on the connecting frame.

[0009] Further, the connecting frame includes a connecting plate and connecting members, there are a plurality of connecting members which are respectively arranged on both sides of the connecting plate, and the first driving member is arranged on the connecting plate.

[0010] Further, the vertical driving mechanism includes a second driving member which is arranged at the bottom of the workbench frame.

[0011] Further, a second slide rail is arranged at the bottom of the workbench frame, and the second driving member is slidably connected to the second slide rail.

[0012] Further, the vertical driving mechanism further includes a force transmission frame, the lower cross beam of the force transmission frame is drivingly connected to the second driving member, the upper cross beam of the force transmission frame is located above the workbench frame and is drivingly connected to the pressing plate, and the longitudinal beams of the force transmission frame longitudinally pass through the workbench frame.

[0013] Further, the vertical driving mechanism further includes a vertical pressure sensor which is arranged between the upper cross beam of the force transmission frame and the pressing plate.

[0014] Further, the full-automatic direct shear apparatus further includes a first slide rail which is arranged between the lower shear box and the workbench frame.

[0015] Applying the technical solution of the present utility model, a full-automatic direct shear apparatus includes a workbench frame, a shear box, a pressing plate, a lifting mechanism, a stop mechanism, a horizontal driving mechanism and a vertical driving mechanism. The shear box includes an upper shear box and a lower shear box which are sequentially arranged on the workbench frame from top to bottom. At least a part of the pressing plate can extend into the shear box. The lifting mechanism includes a support plate which is liftably accommodated in the lower shear box, and the pressing plate is located above the support plate. A space for accommodating a sample is formed between the part of the pressing plate located in the shear box and the support plate. The stop mechanism is arranged on the workbench frame and abuts against the upper shear box. The horizontal driving mechanism is arranged on the workbench frame and is drivingly connected to the lower shear box so that the lower shear box can move horizontally on the workbench frame. The vertical driving mechanism is drivingly connected to the pressing plate to apply pressure to the sample. By placing the sample in the shear box, using the support plate of the lifting mechanism to support the bottom of the sample, and using the vertical driving mechanism to drive the pressing plate to apply pressure to the sample, the application of vertical load to the sample is completed. Subsequently, the lower shear box is driven to move horizontally by the horizontal driving mechanism. At this time, the upper shear box is stopped by the reaction force provided by the stop mechanism, and the sample is sheared. After the horizontal driving mechanism drives the lower shear box to reset, the pressing plate and the support plate drive the sample to descend and apply vertical load to the sample again. By repeating the above operations, the shear plane of the sample in the shear box is changed, so as to realize multiple shearing of the sample, improve the number of shearings and the shearing efficiency, thereby improving the test efficiency and effect of the direct shear apparatus, and solving the problems of low efficiency and poor effect in the existing direct shear test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0017] Figure 1 FIG. 1 shows a schematic structural diagram of a full-automatic direct shear apparatus at an angle in a specific embodiment of the present utility model; and

[0018] Figure 2 FIG. 2 shows a schematic diagram of sample accommodation and sample shear plane in a specific embodiment of the present utility model;

[0019] Figure 3 FIG. 3 shows a schematic structural diagram of the full-automatic direct shear apparatus at another angle in a specific embodiment of the present utility model.

[0020] Wherein, the above-mentioned accompanying drawings include the following reference numerals:

[0021] 10. Workbench frame; 11. Second slide rail; 20. Shearing box; 21. Upper shearing box; 22. Lower shearing box; 221. Box body; 222. Base body; 223. Connecting groove; 30. Pressure plate; 40. Lifting mechanism; 41. Support plate; 42. First driving member; 43. Connecting frame; 431. Connecting plate; 432. Connecting member; 50. Stopping mechanism; 51. Adjusting member; 52. Horizontal pressure sensor; 60. Horizontal driving mechanism; 70. Vertical driving mechanism; 71. Second driving member; 72. Force transmission frame; 73. Vertical pressure sensor; 80. First slide rail; 100. Sample. Detailed implementation manners

[0022] It should be noted that, without conflict, the embodiments and features in the embodiments of this application may be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in combination with the embodiments.

[0023] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0024] In the present utility model, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" generally refer to the directions shown in the drawings, or refer to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contours of the components themselves, but the above orientation terms are not used to limit the present utility model.

[0025] Obviously, the above-described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] In order to solve the problems of low efficiency and poor effect in the direct shear test in the prior art, the present utility model provides a full-automatic direct shear apparatus.

[0027] Such as Figures 1 to 3As shown in the figure, the full-automatic direct shear apparatus includes a workbench frame 10, a shear box 20, a pressing plate 30, a lifting mechanism 40, a stop mechanism 50, a horizontal driving mechanism 60, and a vertical driving mechanism 70. The shear box 20 includes an upper shear box 21 and a lower shear box 22 which are sequentially arranged on the workbench frame 10 from top to bottom. At least a part of the pressing plate 30 can extend into the shear box 20. The lifting mechanism 40 includes a support plate 41 which is liftably accommodated in the lower shear box 22, and the pressing plate 30 is located above the support plate 41. A space for accommodating the sample 100 is formed between the part of the pressing plate 30 located in the shear box 20 and the support plate 41. The stop mechanism 50 is arranged on the workbench frame 10 and abuts against the upper shear box 21. The horizontal driving mechanism 60 is arranged on the workbench frame 10 and is drivingly connected to the lower shear box 22 so that the lower shear box 22 can move horizontally on the workbench frame 10. The vertical driving mechanism 70 is drivingly connected to the pressing plate 30 for pressing the sample 100.

[0028] By placing the sample 100 in the shear box 20, using the support plate 41 of the lifting mechanism 40 to support the bottom of the sample 100, and using the vertical driving mechanism 70 to drive the pressing plate 30 to press the sample 100, the vertical load is applied to the sample 100. Subsequently, the lower shear box 22 is driven by the horizontal driving mechanism 60 to move horizontally. At this time, the upper shear box 21 is stopped by the reaction force provided by the stop mechanism 50, and the sample 100 is sheared. After the horizontal driving mechanism 60 drives the lower shear box 22 to reset, the pressing plate 30 and the support plate 41 drive the sample 100 to descend and apply the vertical load to the sample 100 again. By repeating the above operations, the shear plane of the sample 100 is changed in the shear box, so as to realize shearing the sample 100 multiple times, improve the number of shears and the shearing efficiency, and thus improve the test effect of the direct shear apparatus.

[0029] As Figure 1 shown in the figure, the lifting mechanism 40 further includes a first driving member 42 which is drivingly connected to the bottom of the support plate 41 for adjusting the position of the support plate 41 in the lower shear box 22.

[0030] Specifically, the first driving member 42 is connected to the support plate 41 through a driving rod, and the up and down movement of the support plate 41 is driven by the telescopic movement of the driving rod to complete the movement of the sample 100 in the shear box 20. In this embodiment, the first driving member 42 is an electric cylinder, and the lifting mechanism 40 further includes a stepping motor. The driving rod is driven to move up and down in the vertical direction by driving the electric cylinder through the stepping motor. Optionally, the first driving member 42 is a cylinder or an oil cylinder.

[0031] In this embodiment, the workbench frame 10 has an avoidance opening, at least a part of the first driving member 42 is located below the workbench frame 10, and the support plate 41 passes through the avoidance opening and is located in the lower shear box 22.

[0032] Specifically, the driving rod of the first driving member 42 passes through the top of the workbench frame 10. The driving rod passes through the top of the workbench frame 10 and is connected to the pallet 41. The diameter of the driving rod is smaller than the size of the avoidance opening.

[0033] As Figure 1 shown in the figure, the lifting mechanism 40 further includes a connecting frame 43. The connecting frame 43 is slidably arranged below the workbench frame 10, and the first driving member 42 is arranged on the connecting frame 43.

[0034] Specifically, the connecting frame 43 is connected to the bottom of the lower shear box 22. A sliding channel is arranged on the workbench frame 10. The connecting frame 43 is partially accommodated in the sliding channel. When the lower shear box 22 is driven by the horizontal driving mechanism 60 to move, the connecting frame 43 slides in the sliding channel. Since the sample 100 is placed on the pallet 41 of the lifting mechanism 40 and is subjected to a vertical load, when the lower shear box 22 moves, the pallet 41 and the driving rod will also move, thereby driving the first driving member 42 to move. The sliding arrangement of the connecting frame 43 can enable the lifting mechanism 40 to move along with the movement of the lower shear box 22.

[0035] As Figure 1 shown in the figure, the vertical driving mechanism 70 includes a second driving member 71. The second driving member 71 is arranged at the bottom of the workbench frame 10.

[0036] As Figure 1 shown in the figure, a second slide rail 11 is arranged at the bottom of the workbench frame 10. The second driving member 71 is slidably connected to the second slide rail 11.

[0037] Specifically, the second driving member 71 is slidably connected to the second slide rail 11 arranged at the bottom of the workbench frame 10. The second driving member 71 moves along the second slide rail 11 as the upper shear box 21 moves. Further, during the test, since the stop mechanism 50 abuts against the upper shear box 21, the moving distance of the second driving member 71 along the second slide rail 11 is smaller than the moving distance of the lower shear box 22.

[0038] In another embodiment not shown in the present application, when the second driving member 71 is arranged above the workbench frame 10, the second driving member 71 is slidably arranged on the workbench frame 10.

[0039] As Figure 1 shown in the figure, the connecting frame 43 includes a connecting plate 431 and a plurality of connecting members 432. The plurality of connecting members 432 are respectively arranged on both sides of the connecting plate 431, and the first driving member 42 is arranged on the connecting plate 431.

[0040] Specifically, the connecting member 432 is inserted through the connecting plate 431. A threaded section is provided on the connecting member 432, and the length of the threaded section is greater than the thickness of the connecting plate 431. Two nuts are provided on the connecting member 432, and the two nuts are arranged at both ends of the connecting plate 431. The connecting plate 431 is fastened by tightening the two nuts. Optionally, a stop ring for stopping the connecting plate 431 is provided on the connecting member 432, and the nut cooperates with the stop ring to fix the connecting plate 431. The nut is a self-locking nut.

[0041] As Figures 1 to 3 shown, the vertical driving mechanism 70 further includes a force transmission frame 72. The lower cross beam of the force transmission frame 72 is drivingly connected to the second driving member 71. The upper cross beam of the force transmission frame 72 is located above the workbench frame 10 and is connected to the pressing plate 30. The longitudinal beam of the force transmission frame 72 longitudinally penetrates through the workbench frame 10.

[0042] Specifically, a strip-shaped notch is provided on the top of the workbench frame 10. The longitudinal beam of the force transmission frame 72 is accommodated in the notch and the diameter of the longitudinal beam of the force transmission frame 72 is smaller than the width of the strip-shaped notch. After the test is completed, by manually pushing the cross beam or the longitudinal beam of the force transmission frame 72 along the direction of the second slide rail 11, the longitudinal beam of the force transmission frame 72 slides in the notch to drive the second driving member 71 to slide along the second slide rail 11, so as to facilitate the loading and unloading of the sample 100.

[0043] As Figure 1 shown, the vertical driving mechanism 70 further includes a vertical pressure sensor 73. The vertical pressure sensor 73 is provided between the upper cross beam of the force transmission frame 72 and the pressing plate 30.

[0044] Specifically, one end of the vertical pressure sensor 73 is connected to the upper cross beam of the force transmission frame 72, and the other end is connected to the groove on the pressing plate 30.

[0045] In this embodiment, the direct shear apparatus further includes a water barrier plate and a permeable stone. According to whether the sample 100 is allowed to drain during the test, a water barrier plate or a permeable stone is reasonably selected to be placed between the top of the sample 100 and the pressing plate 30 and between the supporting plate 41 and the bottom of the sample 100.

[0046] As Figure 1 shown, the fully automatic direct shear apparatus further includes a first slide rail 80. The first slide rail 80 is provided between the lower shear box 22 and the workbench frame 10.

[0047] Specifically, as Figure 2The lower shear box 22 shown includes a box body 221 and a base body 222. The box body 221 is connected to the base body 222 by a pin shaft. The base body 222 has a receiving groove, and the box body 221 is accommodated in the receiving groove. The connecting member 432 extends into the connecting groove 223 at the bottom of the base body 222 to realize the connection between the connecting frame 43 and the lower shear box 22. The base body 222 is slidably connected to the first slide rail 80. While the horizontal driving mechanism 60 drives the lower shear box 22 to move along the first slide rail 80, it drives the connecting frame 43 to move.

[0048] Further, the extending direction of the second slide rail 11 provided at the bottom of the workbench frame 10 is parallel to the extending direction of the first slide rail 80 at the top of the workbench frame 10, so as to ensure that during the shear test, the vertical driving mechanism 70 remains in a vertical state as a whole, and thus the vertical load applied to the sample 100 is always vertically downward.

[0049] As shown in the Figure 3 attachment, the stop mechanism 50 includes an adjusting member 51 and a horizontal pressure sensor 52. The horizontal pressure sensor 52 abuts against the upper shear box 21, and the distance between the horizontal pressure sensor 52 and the shear box 20 is adjusted by the adjusting member 51.

[0050] In another embodiment not shown in the present application, there are multiple shear boxes 20 of the full-automatic direct shear apparatus. The multiple shear boxes 20 are arranged at intervals on the workbench frame 10. Correspondingly, the pressing plate 30, the lifting mechanism 40, the stop mechanism 50, the horizontal driving mechanism 60, and the vertical driving mechanism 70 form a supporting group. There are multiple supporting groups, and the multiple supporting groups are respectively arranged in one-to-one correspondence with the multiple shear boxes 20, so as to realize the shear test on multiple different samples 100 at the same time, and finally realize double linkage and four linkage, achieving the effect of improving the test efficiency.

[0051] The steps of using the present application for soil tests can be summarized as follows: Step 1: Adjust the position of the sample 100 in the depth direction of the shear box 20 so that a part of the sample 100 is correspondingly accommodated in the upper shear box 21 and another part of the sample 100 is correspondingly accommodated in the lower shear box 22; Step 2: Apply a preset pressure to the sample 100 placed in the shear box 20; Step 3: Move the upper shear box 21 and the lower shear box 22 in a staggered manner along the shear direction perpendicular to the depth direction of the shear box 20, and detect the data information of the shear force on the sample 100 at this time; Step 4: Move the lower shear box 22 in the reverse direction to reset; Step 5: Repeat Steps 1 to 4 until N groups of data information of the shear force are collected.

[0052] The pallet 41 of the lifting mechanism 40 is arranged inside the lower shear box 22. The sample 100 is placed on the pallet 41. The position of the sample 100 is adjusted by the lifting mechanism 40. Subsequently, a preset vertical load is applied to the sample 100 by the vertical driving mechanism 70, and the vertical load is kept stable and unchanged by the vertical pressure sensor 73 during this stage of shearing. The horizontal driving mechanism 60 drives the lower shear box 22 to move. The upper shear box 21 is blocked by the blocking mechanism 50, thereby realizing the dislocation between the upper shear box 21 and the lower shear box 22, and further realizing the shearing of the sample 100. Until after the completion of this stage of shearing test, the horizontal driving mechanism 60 drives the lower shear box 22 to reset, realizing the reset of the shear box 20. Subsequently, the lifting mechanism 40 drives the pallet 41 to move downward, and under the action of the preset vertical load at the previous stage, the sample 100 moves inside the shear box 20 to complete the replacement of the shear plane of the sample 100. By repeating the above process multiple times, multiple shearing force data are obtained, and abnormal values are screened out by using the regression equation until 4 groups of effective values are obtained, and finally the shearing test is completed.

[0053] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: By providing a full-automatic direct shear instrument including a workbench frame 10, a shear box 20, a pressing plate 30, a lifting mechanism 40, a blocking mechanism 50, a horizontal driving mechanism 60 and a vertical driving mechanism 70, the shear box 20 includes an upper shear box 21 and a lower shear box 22 which are sequentially arranged on the workbench frame 10 from top to bottom. At least a part of the pressing plate 30 can extend into the shear box 20. The lifting mechanism 40 includes a pallet 41 which is liftably accommodated inside the lower shear box 22, and the pressing plate 30 is located above the pallet 41. A space for accommodating the sample 100 is formed between the part of the pressing plate 30 located inside the shear box 20 and the pallet 41. The blocking mechanism 50 is arranged on the workbench frame 10 and abuts against the upper shear box 21. The horizontal driving mechanism 60 is arranged on the workbench frame 10 and is drivingly connected to the lower shear box 22 so that the lower shear box 22 can move horizontally on the workbench frame 10. The vertical driving mechanism 70 is drivingly connected to the pressing plate 30 for pressing the sample 100. By placing the sample 100 inside the shear box 20, using the pallet 41 of the lifting mechanism 40 to support the bottom of the sample 100, and using the vertical driving mechanism 70 to drive the pressing plate 30 to press the sample 100, the vertical load on the sample 100 is completed. Subsequently, the horizontal driving mechanism 60 drives the lower shear box 22 to move horizontally away from the upper shear box 21. At this time, the upper shear box 21 is blocked by the reaction force provided by the blocking mechanism 50, and the sample 100 is sheared. After the horizontal driving mechanism 60 drives the lower shear box 22 to reset, the pressing plate 30 and the pallet 41 drive the sample 100 to descend and apply a vertical load to the sample 100 again. By repeating the above operations, the shear plane of the sample 100 is changed inside the shear box, thereby realizing multiple shearing of the sample 100, improving the number of shearing times and the shearing efficiency, and thus improving the test effect of the direct shear instrument.

[0054] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] It should be noted that the terms "upper", "lower", etc. in the specification, claims and above-mentioned drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein.

[0056] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A fully automatic direct shear apparatus, characterized in that: include: Workbench (10); A shear box (20), the shear box (20) comprising an upper shear box (21) and a lower shear box (22) which are sequentially arranged on the workbench (10) from top to bottom; a pressing plate (30), at least a portion of which is capable of extending into the shear box (20); A lifting mechanism (40), the lifting mechanism (40) comprising a support plate (41), the support plate (41) being movably accommodated in the lower shear box (22), and the pressing plate (30) being located above the support plate (41), and a space for accommodating the sample (100) is formed between a portion of the pressing plate (30) located in the shear box (20) and the support plate (41); A stop mechanism (50), the stop mechanism (50) being arranged on the workbench (10) and abutting against the upper shear box (21); a horizontal driving mechanism (60), the horizontal driving mechanism (60) being arranged on the working platform (10) and being drivingly connected to the lower shear box (22) so as to enable the lower shear box (22) to move horizontally on the working platform (10); A vertical driving mechanism (70), the vertical driving mechanism (70) is drivingly connected to the pressing plate (30) to apply pressure to the sample (100).

2. The fully automatic direct shear apparatus according to claim 1, characterized in that: The lifting mechanism (40) further comprises a first driving member (42), wherein the first driving member (42) is drivingly connected to the bottom of the support plate (41) and is used to adjust the position of the support plate (41) in the lower shear box (22).

3. The fully automatic direct shear apparatus according to claim 2, characterized in that: The workbench (10) has an avoidance opening, at least a portion of the first driving member (42) is located below the workbench (10), and the support plate (41) passes through the avoidance opening and is located in the lower shear box (22).

4. The fully automatic direct shear apparatus according to claim 3, characterized in that: The lifting mechanism (40) further comprises a connecting frame (43), wherein the connecting frame (43) is slidably arranged below the working platform (10), and the first driving member (42) is arranged on the connecting frame (43).

5. The fully automatic direct shear apparatus according to claim 4, characterized in that: The connecting frame (43) comprises a connecting plate (431) and a connecting member (432), wherein the connecting members (432) are multiple and the multiple connecting members (432) are respectively arranged on both sides of the connecting plate (431), and the first driving member (42) is arranged on the connecting plate (431).

6. The fully automatic direct shear apparatus according to claim 1, characterized in that: The vertical driving mechanism (70) comprises a second driving member (71), and the second driving member (71) is arranged at the bottom of the working platform (10).

7. The fully automatic direct shear apparatus according to claim 6, characterized in that: A second slide rail (11) is provided at the bottom of the workbench (10), and the second driving member (71) is slidably connected to the second slide rail (11).

8. The fully automatic direct shear apparatus according to claim 6, characterized in that: The vertical driving mechanism (70) also includes a force transmission frame (72), the lower crossbeam of the force transmission frame (72) is drivingly connected to the second driving member (71), the upper crossbeam of the force transmission frame (72) is located above the working platform (10) and is drivingly connected to the pressure plate (30), and the longitudinal beam of the force transmission frame (72) passes through the working platform (10) longitudinally.

9. The fully automatic direct shear apparatus according to claim 8, characterized in that: The vertical driving mechanism (70) further comprises a vertical pressure sensor (73), wherein the vertical pressure sensor (73) is arranged between the upper crossbeam of the force transmission frame (72) and the pressure plate (30).

10. The fully automatic direct shear apparatus according to any one of claims 1 to 9, characterized in that: The fully automatic direct shear apparatus further comprises a first slide rail (80), wherein the first slide rail (80) is arranged between the lower shear box (22) and the workbench (10).

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