Quadruple equal-strain direct shear apparatus

Abstract

The utility model discloses a quadruple equal strain direct shear apparatus, which relates to the technical field of direct shear apparatus design, and comprises a mounting plate, a horizontal adjusting unit and a quadruple direct shear adjusting unit, the four corners of the lower side surface of the mounting plate are respectively and fixedly connected with a stable supporting leg, and the upper side surface of the mounting plate is provided with the horizontal adjusting unit. A quadruple direct shear adjusting unit is arranged on the upper side surface of a fixing flat plate in the horizontal adjusting unit, the horizontal adjusting unit comprises a protective shell, a supporting vertical rod, a second universal ball, a second universal ball fixing seat and a fixing flat plate, the protective shell is fixedly connected to the upper side surface of the mounting plate, and a rectangular hole is formed in the upper side surface of the protective shell. The rectangular hole extends into the protective shell, the ground is uneven, the level of the workbench can be adjusted, the test precision is not affected, multiple samples can be detected at the same time, and the detection efficiency is not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to direct shear apparatus design technical field, concretely is a four equal strain direct shear apparatus. BACKGROUND

[0002] Equal strain direct shear apparatus is mainly used for determining the shearing strength of soil, usually adopts four soil samples, respectively under different vertical pressure (400Kpa, 300Kpa, 200Kpa, 100Kpa, 50Kpa can be selected), applies horizontal force to shear to obtain the shearing stress at failure, then determines the shearing strength parameter of soil according to Coulomb's law, internal friction angle and cohesion, direct shear test generally takes three to four identical samples, applies different vertical pressure in direct shear apparatus, then applies shear force to them respectively until failure to directly determine the shearing strength of soil on fixed shear surface. Direct shear test apparatus, also known as direct shear apparatus, is used for detecting soil, thus a four equal strain direct shear apparatus is required.

[0003] The existing four equal strain direct shear apparatus cannot adjust the level of the workbench if the ground is uneven, affects the precision of testing, cannot detect multiple samples simultaneously, and affects the detection efficiency. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem of overcoming the defects of the prior art, provides a four equal strain direct shear apparatus, which can adjust the level of the workbench even if the ground is uneven, does not affect the precision of testing, can detect multiple samples simultaneously, does not affect the detection efficiency, and can effectively solve the problems in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a four equal strain direct shear apparatus, comprising a mounting plate, a level adjustment unit and a four direct shear adjustment unit.

[0006] The lower side surface of the mounting plate is fixedly connected with four stabilizing support legs, the upper side surface of the mounting plate is provided with the level adjustment unit, and the upper side surface of the fixed plate in the level adjustment unit is provided with the four direct shear adjustment unit.

[0007] The level adjustment unit comprises a protection shell, a supporting vertical rod, a universal ball two, a universal ball fixing seat two and a fixed plate, the upper side surface of the mounting plate is fixedly connected with a protection shell, a rectangular hole is formed in the upper side surface of the protection shell, the rectangular hole extends into the protection shell, a supporting vertical rod is fixedly connected to the inner bottom end surface of the protection shell, a universal ball two is arranged on the upper side surface of the supporting vertical rod, a fixed plate is arranged in the rectangular hole of the protection shell, a universal ball fixing seat two is fixedly connected to the lower side surface of the fixed plate, and the universal ball two is movably connected in the universal ball fixing seat two.

[0008] The installation plate is used for fixing the installation device, the stable support leg is used for supporting the device, the horizontal adjusting unit is used for adjusting the level, which is convenient to use, the four straight shears adjusting unit is used for testing, the protection shell is used for protecting the inside, so as to protect the use, the support vertical rod is used for fixing the second all-around ball, the second all-around ball and the second all-around ball fixing seat are matched to make the fixed flat plate move, the fixed flat plate is used for fixing the four straight shears adjusting unit, so as to adjust the level and use conveniently.

[0009] Further, the horizontal adjusting unit further comprises a push rod fixing seat, an electric push rod, an all-around ball one and an all-around ball fixing seat one, the inner bottom surface of the protection shell is fixedly connected with a push rod fixing seat at the position of the four corners of the fixed flat plate, an electric push rod is fixedly connected with the push rod fixing seat, an all-around ball one is arranged on the extension end of the electric push rod, the lower side surface of the fixed flat plate is fixedly connected with an all-around ball fixing seat one at the position corresponding to the all-around ball one, the all-around ball one is movably connected with the all-around ball fixing seat one, and the input end of the electric push rod is electrically connected with the output end of the external power supply through the external control switch group.

[0010] The push rod fixing seat is used for fixing the electric push rod, the electric push rod is used for fixing the all-around ball one, the all-around ball one and the all-around ball fixing seat one are matched to conveniently adjust the angle of the fixed flat plate, so that the fixed flat plate is horizontal, and the leveling is convenient to use.

[0011] Further, the horizontal adjusting unit further comprises an inspection cover plate, the front side surface of the protection shell is provided with an inspection hole, the inspection hole extends into the protection shell, the inspection hole is fixedly connected with the inspection cover plate, and the front side surface of the inspection cover plate is movably connected with the pull handle through the movable pin shaft.

[0012] The inspection cover plate is used for protecting the structure in the protection shell, so as to conveniently protect the use and conveniently inspect the inside.

[0013] Further, the four straight shear adjusting unit contains installation local plate, movable ball, lower shear box, upper shear box, clamping plug post and shear pushing instrument, the upper surface of the fixed flat plate is fixedly connected with four equidistant installation local plates, one sliding groove one is formed in the upper surface of each installation local plate, a plurality of equidistant movable balls are arranged in each sliding groove one, a sliding groove two is formed in the left and right sides of the upper surface of each installation local plate, one rectangular slide is slidably connected in each sliding groove two, one lower shear box is arranged on the upper surface of each installation local plate, each lower shear box is fixedly connected with the corresponding rectangular slide, a limiting sliding groove is formed in the lower surface of each lower shear box at the position corresponding to the movable ball, the movable ball on each installation local plate is arranged in the limiting sliding groove, one shear pushing instrument is fixedly connected with the fixed flat plate at the position behind the four installation local plates, the push rod of each shear pushing instrument corresponds to the lower shear box, one insertion hole one is formed in the upper surface of each lower shear box at the four corners, one upper shear box is arranged on the upper surface of each lower shear box, one insertion hole two is arranged on the upper surface of each upper shear box at the four corners, each insertion hole two penetrates the upper and lower surfaces of the upper shear box, one clamping plug post is arranged in each insertion hole two, the lower end of each clamping plug post extends into the corresponding insertion hole one, and the input end of the shear pushing instrument is electrically connected with the output end of the external power supply through the external control switch group.

[0014] The installation local plate is used for fixing the movable ball, the movable ball is used for facilitating the sliding of the lower shear box, the lower shear box and the upper shear box are matched to fix the sample, and the clamping plug post is used for connecting the lower shear box and the upper shear box together, so that the sample can be tested by pulling out the clamping plug post when necessary, and the shear pushing instrument is used for providing power for pushing the lower shear box to move, thereby facilitating the test.

[0015] Further, the four straight shear adjusting unit further contains a U-shaped support frame, a pressing push rod, a sensing pressure plate and a display screen, one U-shaped support frame is fixedly connected with the upper surface of the fixed flat plate at the positions on the left and right sides of the installation local plate, the upper surface of the U-shaped support frame is fixedly connected with the pressing push rod through the fixing frame at the positions corresponding to the four upper shear boxes, the extension end of each pressing push rod penetrates the U-shaped support frame and is fixedly connected with the sensing pressure plate, the lower surface of each sensing pressure plate is fixedly connected with a circular pressing block, each circular pressing block corresponds to the lower shear box, one display screen is arranged on the front surface of the U-shaped support frame at the positions corresponding to the four pressing push rods, and the input end of the pressing push rod, the sensing pressure plate and the display screen is electrically connected with the output end of the external power supply through the external control switch group.

[0016] The U-shaped support frame is used for fixing the pressurizing push rod, the pressurizing push rod adopts a high-precision electric control push rod to facilitate the adjustment of pressure, the inductive pressure plate is used for displaying the pressure on the pressurizing push rod, and the display screen is used for displaying data, so that different pressures are conveniently adjusted, and detection is facilitated.

[0017] Further, the quadruplex straight shear adjusting unit further comprises fixing rectangular blocks and shear measuring instruments, the upper surfaces of the fixing plates are fixedly connected with the fixing rectangular blocks respectively at positions in front of the four mounting local plates, one round hole one is formed in each fixing rectangular block, each round hole one penetrates through the front and back sides of the fixing rectangular block, a connecting cylinder is arranged in each round hole one, the front end face of each connecting cylinder is fixedly connected with a clamping rectangular plate, a compression spring is fixedly sleeved with the connecting cylinder at a position between the fixing rectangular block and the clamping rectangular plate, a shear measuring instrument is fixedly clamped on the front end of each connecting cylinder, and a detection probe of each shear measuring instrument is in contact with a corresponding lower shear box.

[0018] The fixing rectangular blocks are used for fixing the connecting cylinders, the connecting cylinders are used for adjusting the positions of the shear measuring instruments, and the shear measuring instruments are used for detecting and measuring to display measurement data, so that the shear measuring instruments are convenient to measure.

[0019] Compared with the prior art, the quadruplex straight shear apparatus has the following advantages:

[0020] 1. The quadruplex straight shear apparatus has the following advantages: the horizontal adjusting unit is arranged, the protection shell is used for protecting the interior, thereby protecting use, the supporting vertical rod is used for fixing the omnibearing ball two, the omnibearing ball two and the omnibearing ball fixed seat two are matched to enable the fixing plate to move, the fixing plate is used for fixing the quadruplex straight shear adjusting unit, the push rod fixed seat is used for fixing the electric push rod, the electric push rod is used for fixing the omnibearing ball one, the omnibearing ball one and the omnibearing ball fixed seat one are matched to facilitate adjustment of the angle of the fixing plate, thereby enabling the fixing plate to be horizontal, and the maintenance cover plate is used for protecting the structure in the protection shell, thereby facilitating protection use and facilitating leveling use.

[0021] 2, The four straight shear strain apparatuses have the following advantages: the four straight shear adjusting units are arranged, local plates are installed to fix movable balls, the movable balls are used for conveniently sliding the lower shear box, the lower shear box and the upper shear box are matched to fix the sample, convenient for detection, the clamping insertion columns are used for connecting the lower shear box and the upper shear box together, when testing is needed, the clamping insertion columns are pulled out for detection, the U-shaped support frames are used for fixing the pressure pushing rods, the pressure pushing rods adopt high-precision electric control pushing rods to conveniently adjust pressure, the induction pressure plates are used for displaying the pressure on the pressure pushing rods, the display screens are used for displaying data, the fixed rectangular blocks are used for fixedly connecting the cylindrical columns, the cylindrical columns are used for adjusting the positions of the shear measuring instruments, the shear measuring instruments are used for detection and measurement, measurement display data are displayed, and detection is used.

[0022] 3, The four straight shear strain apparatuses have the following advantages: the ground is uneven, the level of the workbench can be adjusted, the testing precision is not affected, multiple samples can be detected at the same time, and the detection efficiency is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 It is a front structure schematic view of the utility model;

[0024] Fig. 2 It is a back sectional structure schematic view of the utility model;

[0025] Fig. 3 It is a four straight shear adjusting unit local sectional structure schematic view of the utility model.

[0026] In the drawing: 1 installation plate, 2 stable support leg, 3 horizontal adjusting unit, 31 protection shell, 32 pushing rod fixed seat, 33 electric pushing rod, 34 million image ball one, 35 million image ball fixed seat one, 36 support vertical pole, 37 million image ball two, 38 million image ball fixed seat two, 39 fixed flat plate, 310 maintenance cover plate, 4 four straight shear adjusting unit, 41 installation local plate, 42 movable ball, 43 lower shear box, 44 upper shear box, 45 clamping insertion column, 46 shear pushing instrument, 47 U-shaped support frame, 48 pressure pushing rod, 49 induction pressure plate, 410 display screen, 411 fixed rectangular block, 412 shear measuring instrument. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] See Figs. 1-3 The embodiment provides a technical scheme, which is a quadruplex equal-strain direct shear apparatus, comprising a mounting plate 1, a horizontal adjustment unit 3 and a quadruplex direct shear adjustment unit 4;

[0029] The mounting plate 1 is fixedly connected with a stable supporting leg 2 at each of four corners of the lower surface, and the upper surface of the mounting plate 1 is provided with the horizontal adjustment unit 3; the upper surface of a fixed plate 39 in the horizontal adjustment unit 3 is provided with the quadruplex direct shear adjustment unit 4.

[0030] The horizontal adjustment unit 3 comprises a protective shell 31, a supporting vertical rod 36, a universal ball 37, a universal ball fixing seat 38 and the fixed plate 39; the upper surface of the mounting plate 1 is fixedly connected with the protective shell 31, the protective shell 31 is provided with a rectangular hole extending into the protective shell 31, the bottom end surface of the protective shell 31 is fixedly connected with the supporting vertical rod 36, the upper surface of the supporting vertical rod 36 is provided with the universal ball 37, the rectangular hole in the protective shell 31 is provided with the fixed plate 39, the lower surface of the fixed plate 39 is fixedly connected with the universal ball fixing seat 38, and the universal ball 37 is movably connected in the universal ball fixing seat 38.

[0031] The mounting plate 1 is used for fixed installation, the stable supporting leg 2 is used for supporting, the horizontal adjustment unit 3 is used for horizontal adjustment, the quadruplex direct shear adjustment unit 4 is used for testing, the protective shell 31 is used for protection, the supporting vertical rod 36 is used for fixing the universal ball 37, the universal ball 37 and the universal ball fixing seat 38 are matched to make the fixed plate 39 movable, and the fixed plate 39 is used for fixing the quadruplex direct shear adjustment unit 4, so that the quadruplex direct shear adjustment unit 4 is leveled and used, and the leveling is convenient to adjust and use.

[0032] The horizontal adjustment unit 3 further comprises a push rod fixing seat 32, an electric push rod 33, a universal ball 34 and a universal ball fixing seat 35; the bottom end surface of the protective shell 31 is fixedly connected with the push rod fixing seat 32 at each of four corners of the fixed plate 39, each push rod fixing seat 32 is fixedly connected with the electric push rod 33, the extension end of each electric push rod 33 is provided with the universal ball 34, the lower surface of the fixed plate 39 is fixedly connected with the universal ball fixing seat 35 at each of four corners corresponding to the universal ball 34, each universal ball 34 is movably connected in the corresponding universal ball fixing seat 35, and the input end of the electric push rod 33 is electrically connected with the output end of an external power supply through an external control switch group.

[0033] The push rod fixing seat 32 is used for fixing the electric push rod 33, the electric push rod 33 is used for fixing the universal ball 34, the universal ball 34 and the universal ball fixing seat 35 are matched to conveniently adjust the angle of the fixed plate 39, so that the fixed plate 39 is leveled, and the leveling is convenient to use.

[0034] The horizontal adjusting unit 3 further comprises an inspection cover plate 310, an inspection hole is opened on the front side surface of the protection shell 31, the inspection hole extends into the protection shell 31, the inspection cover plate 310 is fixedly connected in the inspection hole, and the front side surface of the inspection cover plate 310 is movably connected with the pull handle through a movable pin shaft.

[0035] The inspection cover plate 310 is used for protecting the structure in the protection shell 31, thereby facilitating the protection use and the internal inspection use.

[0036] The quadruplex straight shearing adjusting unit 4 comprises a mounting local plate 41, a movable ball 42, a lower shearing box 43, an upper shearing box 44, a clamping plug column 45 and a shearing pushing instrument 46, four equidistant mounting local plates 41 are fixedly connected on the upper side surface of the fixed flat plate 39, one sliding groove one is opened on the upper side surface of each mounting local plate 41, a plurality of equidistant movable balls 42 are arranged in each sliding groove one, a sliding groove two is opened on the left and right sides of the upper side surface of each mounting local plate 41, a rectangular sliding block is slidably connected in each sliding groove two, one lower shearing box 43 is arranged on the upper side of each mounting local plate 41, the lower shearing box 43 is fixedly connected with the corresponding rectangular sliding block, a limiting sliding groove is opened on the lower side surface of each lower shearing box 43 at the position corresponding to the movable ball 42, the movable ball 42 on each mounting local plate 41 is arranged in the limiting sliding groove, one shearing pushing instrument 46 is fixedly connected on the upper side surface of the fixed flat plate 39 at the position behind the four mounting local plates 41, a push rod on each shearing pushing instrument 46 corresponds to the lower shearing box 43, an insertion hole one is opened on the upper side surface of each lower shearing box 43 at the four corners, one upper shearing box 44 is arranged on the upper side surface of each lower shearing box 43, an insertion hole two is arranged on the upper side surface of each upper shearing box 44 at the four corners, the insertion hole two penetrates through the upper and lower sides of the upper shearing box 44, a clamping plug column 45 is arranged in each insertion hole two, the lower end of each clamping plug column 45 extends into the corresponding insertion hole one, and the input end of the shearing pushing instrument 46 is electrically connected with the output end of the external power supply through an external control switch group.

[0037] The mounting local plate 41 is used for fixing the movable ball 42, the movable ball 42 is used for facilitating the sliding of the lower shearing box 43, the lower shearing box 43 and the upper shearing box 44 are matched to fix the sample, the clamping plug column 45 is used for connecting the lower shearing box 43 and the upper shearing box 44 together, when testing is needed, the clamping plug column 45 is pulled out for testing, the shearing pushing instrument 46 is used for providing power for pushing the lower shearing box 43 to move, thereby facilitating the testing use.

[0038] The quadruple straight shearing adjusting unit 4 further comprises a U-shaped support frame 47, a pressurizing push rod 48, a sensing pressure plate 49 and a display screen 410. The upper side surface of the fixed flat plate 39 is fixedly connected with a U-shaped support frame 47 at the positions on the left and right sides of the mounting local plate 41. The upper side surface of the U-shaped support frame 47 is fixedly connected with the pressurizing push rod 48 through a fixing frame at the positions corresponding to the four upper shearing boxes 44. The extended end of each pressurizing push rod 48 penetrates through the U-shaped support frame 47 and is fixedly connected with the sensing pressure plate 49. The lower side surface of each sensing pressure plate 49 is fixedly connected with a circular pressing block corresponding to the lower shearing box 43. The front side surface of the U-shaped support frame 47 is provided with a display screen 410 at the positions corresponding to the four pressurizing push rods 48. The input ends of the pressurizing push rod 48, the sensing pressure plate 49 and the display screen 410 are electrically connected with the output end of the external power source through the external control switch group.

[0039] The U-shaped support frame 47 is used for fixing the pressurizing push rod 48. The pressurizing push rod 48 is an electrically controlled push rod with high precision, which is convenient for adjusting the pressure. The sensing pressure plate 49 is used for displaying the pressure on the pressurizing push rod 48. The display screen 410 is used for displaying data, thereby facilitating the adjustment of different pressures and the detection and use.

[0040] The quadruple straight shearing adjusting unit 4 further comprises a fixed rectangular block 411 and a shearing measuring instrument 412. The upper side surface of the fixed flat plate 39 is fixedly connected with a fixed rectangular block 411 at the positions on the front side of the four mounting local plates 41. A circular hole one is formed in each fixed rectangular block 411 and penetrates through the front and back sides of the fixed rectangular block 411. A connecting cylinder is arranged in each circular hole one. The front end surface of the connecting cylinder is fixedly connected with a clamping rectangular plate. A compression spring is fixedly sleeved on the connecting cylinder between the fixed rectangular block 411 and the clamping rectangular plate. A shearing measuring instrument 412 is fixedly connected with the front end of the connecting cylinder. The detection probe of each shearing measuring instrument 412 is in contact with the corresponding lower shearing box 43. The input end of the shearing measuring instrument 412 is electrically connected with the output end of the external power source through the external control switch group.

[0041] The fixed rectangular block 411 is used for fixing the connecting cylinder. The connecting cylinder is used for adjusting the position of the shearing measuring instrument 412. The shearing measuring instrument 412 is used for detecting and measuring the use and displaying the measurement data. The shearing measuring instrument 412 is a dial indicator, which is convenient for measuring and using.

[0042] The working principle of the four-union equal-strain straight shear apparatus provided by the utility model is as follows: first, the protection shell 31 is used for protecting the inside, thereby protecting the use, the supporting vertical rod 36 is used for fixing the universal ball two 37, the universal ball two 37 and the universal ball fixed seat two 38 cooperate to make the fixed flat plate 39 move, the fixed flat plate 39 is used for fixing the four-union straight shear adjusting unit 4, the push rod fixed seat 32 is used for fixing the electric push rod 33, the electric push rod 33 is used for fixing the universal ball one 34, the universal ball one 34 and the universal ball fixed seat one 35 cooperate to conveniently adjust the angle of the fixed flat plate 39, thereby making the fixed flat plate 39 horizontal, the maintenance cover plate 310 is used for protecting the structure inside the protection shell 31, thereby conveniently protecting the use, after adjustment, the installation local plate 41 is used for fixing the movable ball 42, the movable ball 42 is used for conveniently making the lower shear box 43 slide, the lower shear box 43 and the upper shear box 44 cooperate to fix the sample, conveniently detecting the use, the clamping insertion column 45 is used for connecting the lower shear box 43 and the upper shear box 44 together, when testing is needed, the clamping insertion column 45 is pulled out to detect the use, the U-shaped support frame 47 is used for fixing the pressure push rod 48, the pressure push rod 48 adopts a high-precision electric control push rod to conveniently adjust the pressure, the induction pressure plate 49 is used for displaying the pressure on the pressure push rod 48, the display screen 410 is used for displaying data, the fixed rectangular block 411 is used for fixing the connecting cylinder, the connecting cylinder is used for adjusting the position of the shear measuring instrument 412, and the shear measuring instrument 412 is used for detecting and measuring.

[0043] It is worth noting that the external control switch group core chip selected in the above embodiment is a PLC single-chip microcomputer, the pressure push rod 48 adopts a high-precision electric control push rod, the shear measuring instrument 412 adopts a dial indicator, the induction pressure plate 49 adopts a pressure sensor, and the external control switch group controls the working of the pressure push rod 48, the shear measuring instrument 412, the induction pressure plate 49, the shear push instrument 46 and the electric push rod 33 by using the method commonly used in the prior art.

[0044] The above only describes the embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion by using the contents of the utility model specification and drawings or directly or indirectly used in other related technical fields is also included in the patent protection range of the utility model.

Claims

1. A quadruple equal strain direct shear apparatus, characterized by: It comprises a mounting plate (1), a horizontal adjustment unit (3) and a quadruple direct shear adjustment unit (4); Mounting plate (1): A stabilizing support leg (2) is fixedly connected to each of the four corners of the lower surface; a horizontal adjustment unit (3) is provided on the upper surface of the mounting plate (1); and a quadruple direct shear adjustment unit (4) is provided on the upper surface of the fixed plate (39) in the horizontal adjustment unit (3); The horizontal adjustment unit (3) comprises a protective shell (31), a supporting vertical rod (36), a universal ball (37), a universal ball fixing seat (38) and a fixed plate (39). The upper surface of the mounting plate (1) is fixedly connected to a protective shell (31). The upper surface of the protective shell (31) is provided with a rectangular hole, and the rectangular hole extends into the protective shell (31). The inner bottom surface of the protective shell (31) is fixedly connected to a supporting vertical rod (36). The upper surface of the supporting vertical rod (36) is provided with a universal ball (37). A fixed plate (39) is provided in the rectangular hole on the protective shell (31). The lower surface of the fixed plate (39) is fixedly connected to a universal ball fixing seat (38). The universal ball (37) is movably connected in the universal ball fixing seat (38).

2. A quadruple equal strain direct shear apparatus according to claim 1, characterized in that: The horizontal adjustment unit (3) further comprises a push rod fixing seat (32), an electric push rod (33), a universal ball (34) and a universal ball fixing seat (35). The inner bottom surface of the protective shell (31) is located at the four corners of the fixed plate (39) and is fixedly connected to a push rod fixing seat (32). Each push rod fixing seat (32) is fixedly connected to an electric push rod (33). An universal ball (34) is provided on the extended end of each electric push rod (33). The four corners of the lower side surface of the fixed plate (39) are located at the positions corresponding to the universal ball (34) and are fixedly connected to a universal ball fixing seat (35). Each universal ball (34) is movably connected in the corresponding universal ball fixing seat (35). The input end of the electric push rod (33) is electrically connected to the output end of the external power supply through an external control switch group.

3. The quadruple equal strain direct shear apparatus according to claim 2, characterized in that: The horizontal adjustment unit (3) further comprises an inspection cover (310), the front surface of the protective shell (31) is provided with an inspection hole, the inspection hole extends into the protective shell (31), the inspection hole is fixedly engaged with the inspection cover (310), and the front surface of the inspection cover (310) is movably connected to the pull handrail via a movable pin shaft.

4. The quadruple equal strain direct shear apparatus according to claim 1, characterized in that: The four-link direct shear adjustment unit (4) includes a mounting plate (41), a movable ball (42), a lower shear box (43), an upper shear box (44), a plug-in column (45) and a shear pusher (46). The upper surface of the fixed flat plate (39) is fixedly connected to four equally spaced mounting plates (41). Each mounting plate (41) is provided with a slide groove 1 on its upper surface. A plurality of equally spaced movable balls (42) are provided in each slide groove 1. Each mounting plate (41) is provided with a slide groove 2 on its upper surface at positions on the left and right sides of the slide groove 1. A rectangular slider is slidably connected in each slide groove 2. A lower shear box (43) is provided on the upper side of each of the four mounting plates (41). Each lower shear box (43) is fixedly connected to the corresponding rectangular slider. A limit position is provided on the lower surface of each lower shear box (43) at a position corresponding to the movable ball (42). The movable ball (42) on each mounting local plate (41) is arranged in the limiting slot, and the upper surface of the fixed flat plate (39) is located at the rear side of the four mounting local plates (41) and is fixedly connected to a shear pusher (46). The push rod on each shear pusher (46) corresponds to the lower shear box (43). The four corners of the upper surface of each lower shear box (43) are respectively provided with a plug-in hole 1, and the upper surface of each lower shear box (43) is respectively provided with an upper shear box (44). The four corners of the upper surface of each upper shear box (44) are respectively provided with a plug-in hole 2. Each plug-in hole 2 passes through the upper and lower sides of the upper shear box (44). A card plug post (45) is respectively provided in each plug-in hole 2. The lower end of each card plug post (45) extends into the corresponding plug-in hole 1. The input end of the shear pusher (46) is electrically connected to the output end of the external power supply through the external control switch group.

5. The quadruple equal strain direct shear apparatus according to claim 4, characterized in that: The quadruple direct shear adjustment unit (4) further comprises a U-shaped support frame (47), a pressure push rod (48), a sensing pressure plate (49) and a display screen (410). The upper surface of the fixed flat plate (39) is located at the positions on the left and right sides of the installation local plate (41) and is fixedly connected to a U-shaped support frame (47). The upper surface of the U-shaped support frame (47) is located at the positions corresponding to the four upper shear boxes (44) and is fixedly connected to the pressure push rod (48) through the fixing frame. The extended end of each pressure push rod (48) is respectively penetrated. The U-shaped support frame (47) is passed through and fixedly connected to the induction pressure plate (49). The lower surface of each induction pressure plate (49) is fixedly connected to a circular pressure block, and each circular pressure block corresponds to the lower shear box (43). The front surface of the U-shaped support frame (47) is respectively provided with a display screen (410) at the position corresponding to the four pressure push rods (48). The input ends of the pressure push rods (48), the induction pressure plate (49) and the display screen (410) are electrically connected to the output end of the external power supply through an external control switch group.

6. The quadruple equal strain direct shear apparatus according to claim 4, characterized in that: The quadruple direct shear adjustment unit (4) further comprises a fixed rectangular block (411) and a shear measuring instrument (412). The upper surface of the fixed flat plate (39) is located in front of the four mounting local plates (41) and is fixedly connected to a fixed rectangular block (411). Each fixed rectangular block (411) is provided with a circular hole 1, and each circular hole 1 passes through the front and rear sides of the fixed rectangular block (411). A connecting cylinder is provided in each circular hole 1. The front end face of each connecting cylinder is fixedly connected to the clamping rectangular plate. A compression spring is fixedly sleeved at a position between the fixed rectangular block (411) and the clamping rectangular plate on each connecting cylinder. A shear measuring instrument (412) is fixedly clamped on the front end of each connecting cylinder. The detection probe on each shear measuring instrument (412) contacts the corresponding lower shear box (43). The input end of the shear measuring instrument (412) is electrically connected to the output end of the external power supply through an external control switch group.

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