CN206515166U - Electronic tetrad strain controlling formula direct shear apparatus - Google Patents

Abstract

The utility model discloses an electric quadruple strain control type direct shearing instrument, aiming to provide an electric quadruple strain control type direct shearing instrument with the advantage of being convenient for operators to carry and transport the instrument. The key points of the technical scheme are as follows: The two adjacent legs are slidably connected with universal wheels. The universal wheels are driven by the adjustment unit and slide on the legs in a direction perpendicular to the horizontal plane. The adjustment unit includes a servo motor and a driving screw, and the driving screw There are two fixed blocks threaded on the bar, on which the ejector rod is hinged, and the end of the ejector rod far away from the fixed block is hinged with the universal wheel, and the driving screw drives the ejector rod and the fixed block to slide relative or opposite to each other, and the operator can push The frame slides in all directions, which is convenient for operators to carry and transport the electric quadruple strain control direct shear instrument. The test components are all controlled by electric motors, which is convenient for operators to operate, improves the degree of automation, and improves work efficiency.

Description

Electric Quadruple Strain Control Direct Shearer

technical field

The utility model relates to the field of soil detection instruments, in particular to an electric quadruple strain control type direct shear instrument.

Background technique

The shear meter is a soil testing instrument widely used in the analysis of construction soil quality. It is mainly used to measure the shear strength of the soil. Usually, four soil samples are used to shear the soil by applying horizontal forces under different vertical pressures. In order to obtain the shear stress at the time of failure, and then determine the shear strength parameters, friction angle and cohesion of the soil through Coulomb's law.

Now generally use the quadruple strain control type direct shear instrument to test the soil shear strength, which can measure four groups of soil samples at the same time, and then calculate the average value to improve the accuracy of the measurement, and at the same time reduce the measurement the time it takes to consume.

At present, the Chinese patent with the publication number CN204789182U discloses a quadruple direct shear instrument, which includes a workbench, a motor on the workbench and four groups of test components, each group of test components comprising a worm gear box, a shear box, The force measuring ring and the pressing piece, the motor is connected with a worm gear box, and the worm gear boxes of the four groups of test components are sequentially connected by transmission, and each worm gear box is provided with a retractable top relative to the side of the shear box. shaft, it also includes four strip-shaped test assembly substrates, on which the test assembly substrate is sequentially provided with a force-measuring ring top platform, a force-measuring ring installation platform, a shear box installation groove, and a worm gear box, and the force-measuring ring is set Between the force measuring ring top platform and the force measuring ring installation platform, the shear box is arranged in the shear box installation groove.

Although this quadruple direct shear instrument can improve measurement accuracy and measurement efficiency to a certain extent, since the detection of soil samples is generally carried out on site, it is necessary to move the quadruple direct shear instrument to the site, while the quadruple direct shear instrument The weight is relatively large, and it is not convenient for the operator to carry it.

Utility model content

The purpose of the utility model is to provide an electric quadruple strain control type direct shear instrument, which has the advantage of being convenient for operators to carry and transport it.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions:

An electric quadruple strain control type direct shear instrument, comprising a frame, legs fixed on the frame, a driving motor and a test assembly driven by the driving motor, two adjacent legs are slidably connected with universal wheels , the universal wheel is driven by the adjustment unit, and slides on the leg along the direction perpendicular to the horizontal plane. The adjustment unit includes a servo motor and a drive screw. The drive screw is screwed with two fixed blocks, and the fixed block is hinged. The ejector rod, the end of the ejector rod away from the fixed block is hinged with the universal wheel, and the driving screw drives the ejector rod and the fixed block to slide relative or oppositely.

By adopting the above technical scheme, when the direct shearing instrument needs to be moved, the operator can place the universal wheel on the ground through the adjustment unit and use it as a support, that is, turn on the servo motor to drive the driving screw to rotate, so that the fixed block and the ejector rod Relative movement, so that the universal wheels can slide down and serve as the support of the frame as a whole, so that the operator can push the frame to slide, and the universal wheels can slide in any direction, so that the operator can push the frame toward Sliding in all directions is convenient for operators to carry and transport the electric quadruple strain control direct shear instrument.

Further configuration: the driving screw is provided with two sections of driving threads in opposite directions, the driving threads are arranged symmetrically to the center line of the driving screw, and the fixing blocks are respectively connected with the two sections of driving threads.

By adopting the above technical solution, when the servo motor drives the driving screw to rotate, since the directions of the two driving threads are opposite, when the driving screw rotates, the two fixing blocks will rotate relative to or opposite to the direction of the screw threads, thereby Drive the angle between the ejector rods to increase or decrease, so as to achieve the purpose of raising or lowering the universal wheel.

Further setting: both ends of the driving screw are provided with driven bevel gears, which are rotatably connected to the legs, the servo motor is located on a leg of the frame, and its output shaft is fixed on a driving screw It is used to drive its rotation, and the driven bevel gears on the remaining legs mesh with each other.

By adopting the above technical solution, the output shaft of the driving motor is fixed on a driving screw to drive its rotation, so that the driving motor is arranged on a leg, which can drive the two driving screw on the leg to rotate , and the other driving screws are linked with the two driving screws through the driven bevel gear, and all the universal wheels can be driven up and down by a servo motor.

Further setting: the test assembly includes four sets of worm gear boxes, a shear box, a force measuring ring and a pressing piece, and a drive shaft is pierced inside the four sets of worm gear boxes, and the drive shaft is driven to rotate by a drive motor.

By adopting the above technical solution, since the drive motor has several gears, and the test components need to apply different shear forces through different rotational speeds, the operator can drive the drive shaft to rotate through the drive motor, and the drive shaft drives four groups at the same time. Simultaneous movement of the test components allows for the same applied shear force.

Further setting: the driving motor is provided with a driving wheel, and the driving shaft is provided with a driven wheel, and the driving wheel and the driven wheel are driven through a synchronous belt.

By adopting the above-mentioned technical scheme, when the synchronous belt is driven, the transmission ratio is accurate, the force on the shaft is small, the structure is compact, the oil resistance is good, the wear resistance is good, the anti-aging performance is good, and the cooperation between the driving motor, the driving wheel and the driven wheel can be smoothly The transmission shaft is used for transmission, so that the applied shear force is more stable.

Further setting: the shear box includes an upper box and a lower box that are slidably connected, and several balls are arranged between the lower box and the frame.

By adopting the above technical scheme, soil samples can be stored in the space formed by the upper box and the lower box, and then compacted by the pressure exerted from above. Due to the need to apply shear force to it, the lower box and the frame are slidingly connected , The setting of the ball can reduce the friction between the lower box and the frame, so as to achieve a better use effect.

Preferably, several connecting plates are arranged between the legs, and the driving motor is fixed on the connecting plates.

By adopting the above technical solution, the drive motor is fixed on the connecting plate and connected and fixed between the four legs, so that the drive motor can be fixed on the bracket relatively smoothly, and the stability of the entire rack can be maintained, so that the overall frame can be It is more stable in use.

In summary, the utility model has the following beneficial effects:

The operator can push the frame to slide, and the universal wheels can slide in any direction, so that the operator can push the frame to slide in all directions, which is convenient for the operator to carry and transport the electric quadruple strain control direct shear instrument , The test components are all controlled by electric motors, which is convenient for operators to operate, improves the degree of automation, and improves work efficiency.

Description of drawings

Fig. 1 is the structural representation of embodiment 1;

Fig. 2 is the structural representation of shear box in embodiment 1;

Fig. 3 is the structural representation of regulating unit in embodiment 1;

Fig. 4 is the structural representation of embodiment 2;

Fig. 5 is an enlarged schematic view of A in Example 2.

Among the figure, 1, frame; 11, outrigger; 12, driving motor; 13, universal wheel; 14, driving wheel; 15, driven wheel; 16, synchronous belt; 17, connecting plate; 18, connecting rod; 2 , test component; 21, worm gear box; 22, shear box; 221, upper box; 222, lower box; 223, ball; 23, force measuring ring; 24, top pressure piece; 241, lever; 25. Drive shaft; 3. Adjustment unit; 31. Servo motor; 32. Drive screw; 321. Drive thread; 322. Driven bevel gear; 33. Fixed block; 331. Telescopic tube; 34. Push rod; 35. 351, auxiliary rod; 352, active rod; 353, hinged rod; 354, transmission rod; 355, positioning rod; 356, fixed rod; 36, movable rod; 361, sliding rod; 37, adjustment cylinder.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Embodiment 1: a kind of electric quadruple strain control type direct shear instrument, as shown in Figure 1, it comprises rectangular frame 1, and the lower surface of frame 1 is provided with four supporting legs 11, is respectively positioned at frame 1 On the four corners, the upper surface of the frame 1 is provided with a test assembly 2. The test assembly 2 includes four groups of worm gear boxes 21, shear boxes 22, force measuring rings 23 and top pressure pieces 24. A The drive shaft 25 is provided with a connecting plate 17 between the four legs 11 below the frame 1, and the connecting plate 17 is provided with a driving motor 12. The driving motor 12 drives the driving shaft 25 to rotate, thereby simultaneously driving four worm gear boxes 21 to move .

As shown in Figure 1, the output shaft of the driving motor 12 is provided with a driving wheel 14, the driving shaft 25 is fixed with a driven wheel 15, and a synchronous belt 16 is wound between the driving wheel 14 and the driven wheel 15. When the driving motor 12 rotates It can drive the drive shaft 25 to rotate synchronously. Referring to Fig. 2, the shear box 22 is divided into an upper box 221 and a lower box 222 which are slidably connected. It is slidingly connected with the frame 1 and provided with several balls 223, which can reduce the friction between the frame 1 and the lower case 222, thereby increasing the accuracy of measurement.

As shown in Figure 1, the right side of the shear box 22 is a force-measuring ring 23, the force-measuring ring 23 can measure the size of the shear force suffered by the soil sample, and the bottom of the shear box 22 is a top pressure piece 24, the top pressure piece 24 includes a lever 241 and a weight 242. The weight 242 applies pressure to the lever 241, thereby driving the lever 241 to apply pressure to the soil sample in the shear box 22.

During detection, the operator places the soil sample in the shear box 22, and then applies pressure to the lever 241 through the weight 242, and the lever 241 applies pressure to the soil sample in the shear box 22, and simultaneously starts the driving motor 12, and drives the motor 12 drives the drive shaft 25 to rotate, then the worm gear box 21 applies shear force to the upper box 221 of the shear box 22, and it is measured by the shear force ring, and then the shear strength of the soil sample is obtained by Coulomb's law.

As shown in Figures 1 and 3, four universal wheels 13 are arranged between the legs 11, and the universal wheels 13 are driven to slide up and down by the adjustment unit 3, and four driving wheels 11 are arranged between each pair of four legs 11. Lead screw 32, the two ends of driving screw 32 are all provided with driven bevel gear 322, and the two ends of driving screw 32 are all connected with support leg 11 rotationally, see Fig. 3, wherein a support leg 11 is fixed with servo motor 31. The output shaft of the servo motor 31 is set to the right, and its end is fixed to the driving screw 32 on the right side, and the driven bevel gear 322 of the other driving screw 32 is connected to the driven bevel gear 322 on the adjacent driving screw 32 Engagement is set, and when servomotor 31 rotates like this, its output shaft can drive a driving screw 32 to rotate, and then drive other driving screw 32 to rotate by this driving screw 32.

As shown in Figures 1 and 3, the driving screw 32 is symmetrical to its midpoint, and is provided with two sections of driving threads 321. The directions of the two sections of driving threads 321 are opposite. The direction of the driving screw thread 321 is opposite, and each segment of the driving screw thread 321 is provided with a fixed block 33 threadedly connected with it. The fixed block 33 is fixed with a telescopic tube 331, and the telescopic tube 331 sets the driving screw 32 inside, and One end is fixed with the supporting leg 11, and a push rod 34 is hinged on the fixed block 33, and the push rod 34 on the same driving screw 32 is hinged on the same universal wheel 13.

When the servo motor 31 drives the driving screw 32 to rotate, since the direction of the driving thread 321 is opposite, the fixed block 33 can rotate and move to both sides under the action of the thread, and at the same time, under the limit of the telescopic tube 331, the fixed block 33 The circumferential rotation is limited, so it can only move linearly, and it can drive the push rod 34 to move, and the angle between the two tops and the universal wheel 13 changes, thereby changing the height of the universal wheel 13. Carry out lifting or descending, thereby can put up or put down the universal wheel 13, reach the purpose of supporting the whole direct shearing instrument, be convenient for the operator to carry it.

Embodiment 2: An electric quadruple strain control type direct shear instrument, the difference from Embodiment 1 is that, as shown in Figure 4 and Figure 5, several connecting rods 18 are arranged between the legs 11, and the connecting rods 18 are parallel to each other to form a rectangular shape. The adjustment unit 3 includes a movable rod 36, an adjustment cylinder 37 and an adjustment mechanism 35. A universal wheel 13 is fixed below the movable rod 36. The adjustment mechanism 35 is hinged on the leg 11, and the adjustment cylinder 37 is hinged on the connection The rod 18 is positioned between the two supporting legs 11, and the output shaft of the adjustment cylinder 37 is hinged with an active rod 352. One end of the active rod 352 is hinged with the adjustment cylinder 37, the middle position is hinged with the legs 11, and the other end is hinged. There is an auxiliary rod 351, the upper end of the auxiliary rod 351 is hinged with a transmission rod 354, and the lower end is hinged with a hinged rod 353.

As shown in Figures 4 and 5, the transmission rod 354 is arranged in a "V" shape, one end of which is hinged with the movable rod 36, and the other end is hinged with a positioning rod 355, which is hinged with the transmission rod 354 and the supporting leg 11 respectively. One end of hinged rod 353 is hinged with auxiliary rod 351, and the other end is hinged with supporting leg 11. A fixed rod 356 for auxiliary connection is also hinged between auxiliary rod 351 and movable rod 36, active rod 352, transmission rod 354, hinged rod 353, Both the fixed rod 356 and the positioning rod 355 are arranged symmetrically with respect to the movable rod 36 .

When the output shaft of the oil cylinder 37 is adjusted in this way, the active rod 352 is driven to rotate around the hinge point in the middle, and the auxiliary rod 351 is pulled to rise or fall. Or down, and the function of positioning rod 355 is to provide supporting force for transmission rod 354, so that it can drive the movable rod 36 to rise. Also be provided with slide bar 361 on bar 36, slide bar 361 is connected with frame 1 slidingly, can limit the lateral movement of movable bar 36 like this, makes it only can slide up and down, thereby reaches the purpose of elevating universal wheel 13.

The above-mentioned embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution according to needs after reading this description, but as long as it is within the utility model All new claims are protected by patent law.

Claims (7)

1. a kind of electronic tetrad strain controlling formula direct shear apparatus, including frame（1）, be fixed on frame（1）On supporting leg（11）, driving Motor（12）With by motor（12）The test suite of drive（2）, it is characterised in that：Adjacent two supporting legs（11）Slide It is connected with universal wheel（13）, universal wheel（13）Pass through adjustment unit（3）Driving, in supporting leg（11）On along perpendicular to horizontal plane Direction slides, adjustment unit（3）Including servomotor（31）With driving leading screw（32）, drive leading screw（32）On be threaded with two Block fixed block（33）, fixed block（33）On be hinged with push rod（34）, push rod（34）Away from fixed block（33）One end and universal wheel （13）It is hinged, drives leading screw（32）Drive push rod（34）And fixed block（33）Relative or opposite slip.

2. electronic tetrad strain controlling formula direct shear apparatus according to claim 1, it is characterised in that：The driving leading screw（32） Provided with two sections of driving screw threads in opposite direction（321）, drive screw thread（321）To drive leading screw（32）Center line symmetrically set Put, fixed block（33）Respectively with two sections of driving screw threads（321）Connection.

3. electronic tetrad strain controlling formula direct shear apparatus according to claim 2, it is characterised in that：The driving leading screw（32） Two ends be equipped with driven wheel of differential（322）, and it is rotatably connected on supporting leg（11）On, servomotor（31）Positioned at frame（1） A supporting leg（11）On, its output shaft is fixed on a driving leading screw（32）On to drive it to rotate, remaining supporting leg（11） On driven wheel of differential（322）Intermeshing.

4. electronic tetrad strain controlling formula direct shear apparatus according to claim 1, it is characterised in that：The test suite（2） Including four groups of worm gear cases（21）, shear box（22）, proving ring（23）And top-pressure part（24）, four groups of worm gear cases（21）Inside it is equipped with one Root drive shaft（25）, drive shaft（25）Pass through motor（12）Drive rotation.

5. electronic tetrad strain controlling formula direct shear apparatus according to claim 4, it is characterised in that：The motor（12） It is provided with driving wheel（14）, drive shaft（25）It is provided with driven pulley（15）, driving wheel（14）And driven pulley（15）Pass through timing belt （16）Transmission.

6. electronic tetrad strain controlling formula direct shear apparatus according to claim 4, it is characterised in that：The shear box（22）Bag Include the upper box being slidably connected（221）With lower box（222）, lower box（222）With frame（1）Between be provided with several balls（223）.

7. electronic tetrad strain controlling formula direct shear apparatus according to claim 1, it is characterised in that：The supporting leg（11）Between Provided with some pieces of connecting plates（17）, motor（12）It is fixed on connecting plate（17）On.