CN108981972A - A kind of vehicle load measurement instrument that can measure shearing force and cone index simultaneously - Google Patents
A kind of vehicle load measurement instrument that can measure shearing force and cone index simultaneously Download PDFInfo
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- CN108981972A CN108981972A CN201810647662.6A CN201810647662A CN108981972A CN 108981972 A CN108981972 A CN 108981972A CN 201810647662 A CN201810647662 A CN 201810647662A CN 108981972 A CN108981972 A CN 108981972A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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Abstract
The present invention provides the vehicle load measurement instrument that one kind can measure shearing force and cone index simultaneously, are mainly made of the shear rod and conical rod that are adsorbed on the vacuum chuck of surface of vehicle, the attachment device that length and angle can be changed, control axis measurement case and entrance soil actual measurement；The injection vertical motion of conical rod and the shearing rotary motion of pawl disk realize that be independent of each other, precision is higher respectively；Electric pushrod replaces manual operation, convenient for controlling the penetrating speed of conical rod, while can also perceive depth of penetration by the linear displacement transducer moment connecting with electric pushrod lower part；Leadscrew-nut mechanism inside measurement case can realize the relative movement of cabinet and the fixed position of vehicle, and the pawl disk of cabinet lower end regular length can protrude into soil, carry out the measurement of shearing force；The connection with vehicle is realized by the vacuum chuck of measuring instrument tail end, it is easy to disassemble, and can realize the measurement of different direction, different angle.
Description
Technical field
The present invention relates to a kind of vehicle load measurement instrument, in particular to one kind can measure vehicle front region or vehicle body simultaneously
The vehicle load measurement instrument of side zone of ignorance soil shear and cone index.
Background technique
Terra mechanics are a Ge Xin branches of engineering mechanics, the main relationship studied between machine and its work ground.Root
According to different soil physical properties, ground geometrical property is existing between mechanics of tire characteristic and vehicle load and geometric dimension
Correlation establish series of theories formula, pure experience or semiempirical formula, and therefrom determine vehicle design parameter and choosing
Select best design.And one of its main contents are exactly the performance analyzed automobile in mellow soil and mellow soil performance
Analysis.So it is particularly significant to design suitable vehicle load measurement instrument.
With the development of science and technology, the vehicle in different industries field proposes eager Research Requirements, vehicle to ground passability
Passability problem in the soil becomes particularly significant.In order to judge soil travelling, U.S. army engineer watt Wei Si test thoroughly
Station recommends a kind of rapid test method, abbreviation WES method, this method to be used in the world.WES method is mainly native influencing
The engineering properties of earth enabling capabilities and soil propulsive force is combined together to form as a metric, is called " cone index "
(CI).But the instrument of current measurement soil cone index is almost independent measurement formula, does not combine with vehicle, needs work
Driving vehicle is left as personnel, holds measurement.
In addition, the maximum drawbar pull that automobile can be generated when driving on soft terrain is by the tangential shear strength of soil
Limitation, therefore, the shear property of soil are the most important properties for influencing automobile soft terrain passability.How soil is measured simultaneously
Shearing force and cone index the two soil key property, and be particularly important in conjunction with vehicle.
Summary of the invention
For the present invention for the deficiencies in the prior art, provide a kind of can measure the vehicle-mounted of shearing force and cone index simultaneously
Instrument, and the measurement of shearing force and cone index respectively independently carries out, and is independent of each other, precision is higher.
To solve the above problems, the present invention is achieved by the following technical scheme:
A kind of vehicle load measurement instrument that can measure shearing force and cone index simultaneously, which is characterized in that including one for inhaling
The vacuum chuck being attached on vehicle body, vacuum chuck is hinged by one end of No. 1 ball head universal and telescopic rod, telescopic rod it is another
End is hinged by one end of No. 2 ball head universals and connecting rod, is provided with vertical through slot in the right end face of a measurement case,
The feed screw nut that the other end of connecting rod passes through in the leadscrew-nut mechanism in the through slot and measurement case of measurement case passes through connecting plate
It being fixedly connected, the upper end of the lead screw in leadscrew-nut mechanism is fixedly connected by first shaft coupling with the output shaft of decelerating motor,
The lower end of lead screw is connected on the lower wall inner surface of measurement case by deep groove ball bearing and fixing seat, electric pushrod it is flexible
The lower end at end is threadedly coupled with the electric interfaces of a pressure sensor, the pressure interface of pressure sensor lower end and a lower end
Conical rod with circular cone probe is fixedly connected, and the measurement end of a linear displacement transducer is fixedly connected with electric pushrod, is subtracted
Speed motor, the control terminal of electric pushrod and linear displacement transducer are fixed in measurement case by upper mounted plate, and one hollow
The upper end of the shear rod of rod structure passes through measurement case lower wall and is fixedly connected with the reduction gearing being arranged in measurement case, shear rod
Lower end be fixedly installed a cylindrical pawl disk, pawl face interval of trying to get to the heart of a matter is evenly provided with four cuboid blades, conical rod
Upper end pass through shear rod central through hole and measure case lower wall after be fixedly connected with the pressure interface of pressure sensor, a servo
Motor is fixed in measurement case by a bottom plate, and the output shaft of servo motor passes through a second shaft coupling and one
The upper end of a transmission shaft connects, and the lower end of transmission shaft is fixedly connected with a transmission gear, and transmission gear is engaged with reduction gearing,
The number of teeth of reduction gearing is greater than the number of teeth of transmission gear, and a flange type torque sensor is arranged on transmission shaft to be passed for measuring
The torque of moving axis measures in case and is provided with control circuit, decelerating motor, pressure sensor, linear displacement transducer, electric pushrod
Control terminal, servo motor and flange type torque sensor connected to the control circuit by harness.
Further technical solution includes:
Vacuum chuck includes rubber suction face and sucker disk seat, and for adsorption plane for being adsorbed on vehicle body, sucker disk seat lower end has one
For the port that the exhaust tube with vacuum equipment is connect, sucker disk seat top is from threaded, No. 1 ball head universal and No. 2 bulbs ten thousand
It is the ball head universal of included retaining ring to section, the retaining ring end of No. 1 ball head universal and the sucker disk seat top of vacuum chuck
Threaded connection, one end of No. 1 ball head universal bulb end and telescopic rod connects, the retaining ring of No. 2 ball head universals and flexible
The other end of bar connects, and the bulb end of No. 2 ball head universals is connect with connecting rod.
The telescopic rod is two sections of hollow round bars of nested type, and two sections of telescopic rod are respectively outer loop bar and inner sleeve
Bar, outer loop bar and inner rod nest together, and have a clamping screw in outer loop bar and inner rod junction, the clamping screw and outer
Threaded hole on loop bar is threadedly coupled, and when tightening clamping screw, stud base contacts inner rod, prevents inside and outside loop bar is opposite from transporting
It is dynamic, play fixed function, outer loop bar and inner rod have an internal screw thread, and inner rod front end passes through screw thread and No. 1 ball head universal
The connection of bulb end, housing rod rear end are connect also by internal screw thread with the retaining ring of No. 2 ball head universals.
Electric pushrod lower end is provided with vertical threaded hole and is used to be threadedly coupled with the electric interfaces above pressure sensor, electricity
It is provided with horizontal tapped through hole above the vertical threaded hole of dynamic push rod, the measurement end bottom of linear displacement transducer is provided with screw thread
Hole, the threaded hole screw thread of the measurement end bottom of the threaded hole and linear displacement transducer of connection bolt and electric pushrod lower end level
Connection, the measurement end of electric pushrod and linear displacement transducer is fixed.
It is fixedly installed the foregrip for operator's grip on the front end face of the measurement case, measures the rear end face of case
On be provided with foregrip symmetrically after handle.
It is fixedly installed one piece of LED display in the left end face of the measurement case, is located at LED in left end face and shows
It is provided on & off switch, reset key, measurement case below screen and rises control key, measurement case decline control key, shear rod job key, circle
It bores bar and rises control key, conical rod decline control key and depth registration key, LED display, reset key, measures on case on & off switch
It rises control key, measurement case decline control key, shear rod job key, conical rod and rises control key, conical rod decline control key and depth
Degree record key passes through harness and connect with the control circuit measured in case.
The present invention compared with the existing technology, has the following beneficial effects:
1. the shearing force and cone index of soil can be measured simultaneously, the injection vertical motion of conical rod and the shearing rotation of pawl disk
Transhipment is dynamic to be realized respectively, and two kinds of measurements are independent of each other, and do not intervene mutually, precision is higher, and conical rod and pawl disk are by two motors
Respectively driving, can synchronize movement；
2. replacing manual operation using electric pushrod, convenient for controlling the penetrating speed of conical rod, it is allowed to comply fully with the world
ASAE S313.3FEB04 standard, while can also be perceived by the linear displacement transducer moment being connect with electric pushrod lower part
Depth of penetration keeps surveyed cone index more accurate；
3. measuring the nut body inside case, the relative movement of cabinet and the fixed position of vehicle may be implemented, so that
For the measuring instrument under conditions of certain fixed height, the pawl disk of cabinet lower end regular length can protrude into soil, carry out shearing force
Measurement, and there are two symmetrical handles for body side dress, it is ensured that pawl disk and the vertical injection of conical rod；
4. the connection with vehicle is realized by the vacuum chuck of measuring instrument tail end, it is easy to disassemble, it is mountable in surface of vehicle
Different location, and pass through two ball head universals realization different direction of telescopic rod and bar two sides, the measurement of different angle, such as
Vehicle front region, vehicle body side range and certain slope road surface.
Detailed description of the invention
The present invention will be further described below with reference to the drawings:
Fig. 1 is the vehicle load measurement instrument working condition that one kind of the present invention can measure shearing force and cone index simultaneously
Structural schematic diagram；
Fig. 2 is the vehicle load measurement instrument collapsed state that one kind of the present invention can measure shearing force and cone index simultaneously
Structural schematic diagram；
Fig. 3 is that one kind of the present invention can measure measurement case in the vehicle load measurement instrument of shearing force and cone index simultaneously
Positive structure schematic；
Fig. 4 is that one kind of the present invention can measure measurement case in the vehicle load measurement instrument of shearing force and cone index simultaneously
Schematic diagram of internal structure；
Fig. 5 is the vehicle load measurement instrument signal flow that one kind of the present invention can measure shearing force and cone index simultaneously
Figure；
In figure: 1. vacuum chucks, No. 2.1 ball head universals, 3. clamping screws, 4. telescopic rods, No. 5.2 ball head universals,
6. connecting rod, 7. measurement casees, 8. foregrips, handle after 9., 10. shear rods, 11. conical rods, 12.LED display screen, 13. switches
Key, 14. reset keys, 15. measurement casees rise control key, and 16. measurement casees decline control key, 17. shear rod job keys, 18. circular cones
Bar rises control key, and 19. conical rods decline control key, 20. depth registration keys, 21. decelerating motors, 22. upper mounted plates, and 23. the
One shaft coupling, 24. connecting plates, 25. feed screw nuts, 26. lead screws, 27. deep groove ball bearings, 28. fixing seats, 29. electric pushrods,
30. pressure sensor, 31. linear displacement transducers, 32. connection bolts, 33. servo motors, 34. bottom plates, 35. second
Axis device, 36. transmission shafts, 37. flange type torque sensors, 38. transmission gears, 39. reduction gearing.
Specific embodiment
Structure of the invention, the course of work and implementation step are further illustrated with reference to the accompanying drawing.
One kind provided by the invention can measure shearing force simultaneously and the vehicle load measurement instrument of cone index is as depicted in figs. 1 and 2,
The mainly measurement by being adsorbed on the variable attachment device of the vacuum chuck 1 of surface of vehicle, length and angle, playing control central action
Case 7 and the shear rod 10 and the composition of conical rod 11 for entering soil actual measurement.
Vacuum chuck 1 includes rubber suction face and sucker disk seat two parts, and the bottom end that sucker disk seat is connect with rubber suction face has
One bleeding point, sucker disk seat top is from threaded.First by the rubber suction face paste of vacuum chuck 1 before vehicle body side or vehicle body
It holds at relatively smooth plane, makes rubber suction face and be adsorbed between face not stay gap, then by the bleeding point on sucker disk seat
It is connected by adapter tube and vacuum equipment, rubber suction face to the greatest extent and the air being adsorbed between face are taken out in starting vacuum equipment suction, from
And realize absorption fixed function.When needing replacing absorption position, being inflated by bleeding point into vacuum chuck 1 be can be realized.
Attachment device mainly includes No. 1 ball head universal 2,4, No. 2 ball head universals 5 of telescopic rod and connecting rod 6.No. 1 ball
Head gimbal 2 and No. 2 ball head universal 5 is the ball head universal of included locking ring type.The retaining ring of No. 1 ball head universal 2
End is threadedly coupled with the sucker disk seat top of vacuum chuck 1.Telescopic rod 4 be one two sections of hollow round bars of nested type, including outer loop bar and
Inner rod two parts have a clamping screw 3 in outer loop bar and inner rod junction, the screw thread on the clamping screw 3 and outer loop bar
Hole is threadedly coupled, and when tightening clamping screw 3, stud base contacts inner rod, is prevented inside and outside loop bar relative motion, is played fixed work
With.Outer loop bar and inner rod have internal screw thread, and inner rod front end is connect by screw thread with the bulb end of No. 1 ball head universal 2, outside
Set rod rear end is connect also by screw thread with the retaining ring end of No. 2 ball head universals 5.No. 1 ball head universal 2 and No. 2 bulb is universal
Section 5 plays varied angle jointly, realizes comprehensive measurement.Connecting rod 6 is a solid round rod, and one end of connecting rod 6 is connected in No. 2
On the bulb end of ball head universal 5, the other end of connecting rod 6 is provided with threaded hole, and connecting rod 6 protrudes into survey with one end of threaded hole
The connection with measurement case 7 is realized in 7 right end face through slot of measuring tank.
Measurement case 7 is hollow rectangular parallelepiped structure, using 8 place end face of foregrip as front end face, in the right side of measurement case 7
It is provided with a through slot, the width of the through slot is greater than the diameter of connecting rod 6, does not occur when guaranteeing connecting rod 6 with measurement 7 relative motion of case
Interference.7 left side of case assembly LED display 12 and eight control keys are measured, LED display is for showing real time data, such as
Soil shear, cone index value, eight control keys control the execution of different function respectively.Measurement 7 front end face of case is held before being equipped with
8, the rear end face of measurement case 7 is equipped with rear handle 9, and foregrip 8 and rear handle 9 are symmetrically installed and are attached separately to front end face and rear end
Face center when connected shear rod 10 just contacts soil when measurement 7 lower end surface of case, can use two handles adjustment and survey
The posture of measuring tank 7 in the horizontal direction, to guarantee that lower end shear rod 10 vertically into soil, improves measurement accuracy.In addition,
Foregrip 8 is with the hands held when measurement and rear handle 9 may also function as stabilization, prevents shear rod 10 and conical rod 11 from encountering
The bounce of injustice caused by soil medium stone.Measurement 7 lower end surface of case is provided with a circular through hole, the aperture and 10 bar outer diameter of shear rod
Size is consistent and can guarantee 10 normal rotation of shear rod.
Measurement 7 internal structure of case fixes one above admittedly as shown in figure 4, measurement 7 tank wall inside front of case is bolted
Fixed board 22, upper mounted plate 22 are made of two pieces of mutually perpendicular rectangular slabs, wherein vertical rectangular slab upper end is opened, there are two parallel
Threaded hole, for being bolted fixed position, horizontal rectangular plate is opened there are three through-hole, for fixing decelerating motor 21, electronic pushing away
Bar 29 and linear displacement transducer 31.The fuselage of decelerating motor 21 is lived by the horizontal rectangular plate support of upper mounted plate 22, and slow down electricity
The output shaft of machine 21 passes through the through-hole of horizontal rectangular plate straight down, with the first shaft coupling for being fixed on horizontal rectangular plate lower end
23 upper end connection, the lower end of first shaft coupling 23 are fixedly connected with the upper end of lead screw 26, are subtracted by the realization of first shaft coupling 23
Speed motor 21 drives 26 common rotation of lead screw.Feed screw nut 25 moves up and down vertically when lead screw 26 rotates, feed screw nut 25
Upper surface and lower end surface are provided with threaded hole, and the fixation with connecting rod 6 is realized by bolt and connecting plate 24.Connecting plate 24, which divides, is
Upper and lower two pieces of parallel rectangular slabs, the rear and front end of every piece of rectangular slab are provided with threaded hole, and one end passes through bolt and feed screw nut 25
Side is fixed, and the other end is fixed by bolt and connecting rod 6, to realize connecting rod 6 with the common fortune up and down of feed screw nut 25
It is dynamic.26 lower end of lead screw is inserted into deep groove ball bearing 27, and deep groove ball bearing 27 is fixed in fixing seat 28.29 upper end of electric pushrod is
Control terminal is fixed on upper mounted plate 22, and the telescopic end of electric pushrod 29 passes through the through-hole on the horizontal rectangular plate of fixed plate 22,
The lower end of the telescopic end of electric pushrod 29 is provided with the threaded hole for the vertical direction being threadedly coupled with 30 electric interfaces of pressure sensor,
And the side of the telescopic end in electric pushrod 29 be provided with horizontal direction tapped through hole be used for and linear displacement transducer 31 measure
The lower end of the bolt at end connects.Pressure sensor 30 for when receiving 11 injection soil of conical rod, soil to the pressure of conical rod 11,
To be converted to cone index, pressure sensor 30 is fixed between conical rod 11 and electric pushrod 29, on pressure sensor 30
End electric interfaces are connect with the lower thread of 29 telescopic end of electric pushrod, 30 lower end pressure interface of pressure sensor and conical rod
The internal screw thread of 11 upper ends connects.Ipsilateral 31 upper end of linear displacement transducer of electric pushrod 29 is bolted on upper mounted plate
On 22,31 measurement end bottom of linear displacement transducer is provided with the threaded hole of horizontal direction, and connection bolt 32 passes through electric pushrod 29
The horizontal threaded bore of the 31 measurement end bottom of tapped through hole and linear displacement transducer of side horizontal, by the flexible of electric pushrod 29
End is fixed with 31 measurement end of linear displacement transducer, thus when electric pushrod 29 pushes 11 injection soil of conical rod, straight line position
The depth of penetration of 31 real-time measurement conical rod 11 of displacement sensor.It is solid in the case where the measurement 7 inner wall other side of case is bolted one
Fixed board 34, bottom plate 34 is similar to 22 structure of upper mounted plate, and size is different, and bottom plate 34 plays fixed servo motor 33
Effect, the through-hole that the output shaft of servo motor 33 passes through bottom plate 34 are connect with the upper end of second shaft coupling 35, the second shaft coupling
The lower end of device 35 is connect with the upper end of a transmission shaft 36, and a flange type torque sensor 37, method are housed on transmission shaft 36
Blue formula torque sensor 37 is through on transmission shaft 36, by comparing 37 top and bottom axis torque of flange type torque sensor
Difference obtains soil shear moment.36 lower end of transmission shaft is fixedly connected with transmission gear 38, is rotated synchronously with transmission gear 38.It passes
Moving gear 38 is meshed with the reduction gearing 39 for being connected in 10 upper end of shear rod, drives shear rod 10 to rotate by meshing relation,
To shear soil.In addition, 39 number of teeth of reduction gearing is greater than 38 number of teeth of transmission gear, make transmission ratio less than 1, realizes effect of slowing down
Fruit.
Shear rod 10 is a Hollow circular beam, the upper end of shear rod 10 pass through measurement 7 lower wall of case protrude into measurement case 7 and with survey
A reduction gearing 39 inside measuring tank 7 is fixedly connected, and the connected pawl disk in the lower end of shear rod 10, pawl disk is cylindrical body, pawl
The face of trying to get to the heart of a matter is set there are four equidistant cuboid blade, and when measurement, pawl disk lower end surface and soil face contact, pawl face blade of trying to get to the heart of a matter enter soil
Earth carries out shearing motion.Conical rod 11 is a solid round rod, and the upper end of conical rod 11 passes through the hollow portion and survey of shear rod 10
The lower wall of measuring tank 7, into measurement case 7 after connect with the pressure sensor 30 in measurement case 7, the lower end of conical rod 11 is one connected
Circular cone probe, circular cone probe are designed fully according to ASAE S313.3FEB04 standard, and apex angle is 30 °, and projected area is
3.2cm2.Conical rod 11 can be taken in completely in the hollow portion of shear rod 10 when not working, and when work can adjust as needed stretches
Length out.
Control circuit and several harness (not marking in figure), decelerating motor 21, pressure sensor are also equipped in measurement case 7
30, linear displacement transducer 31, the control terminal of electric pushrod 29, servo motor 33 and flange type torque sensor 37 pass through
Harness connects to the control circuit, to realize the control to entire measuring instrument.Control circuit pressure in receiving measurement process
After the signal of sensor 30, linear displacement transducer 31 and flange type torque sensor 37, by relevant calculation, by last soil
Earth cone index value, depth of penetration and soil shear are shown on LED display 12 by harness.LED display 12, switch
Key 13, reset key 14, measurement case rise control key 15, measurement case decline control key 16, shear rod job key 17, conical rod and rise
Control key 18, conical rod decline control key 19 and depth registration key 20 are connect by harness with the control circuit measured in case 7.
On & off switch 13 controls the on-off of entire measuring instrument internal circuit for switching on and off power supply.Reset key 14 is for removing
The data recorded on LED display 12, so as to carry out multiplicating measurement.After pressing measurement case rising control key 15, control
Circuit processed controls decelerating motor 21 by harness and rotates, and the output shaft of decelerating motor 21 drives lead screw 26 to rotate, feed screw nut 25
Decline, the entire case 7 that measures are moved up with respect to connecting rod 6, and the shear rod 10 connecting with measurement case 7 leaves soil.Measure case decline control
Key 16 processed then controls the reversion of decelerating motor 21, while lead screw 26 inverts, and feed screw nut 25 rises, and measurement case 7 is with respect under connecting rod 6
It moves, presses measurement case decline control key 16 again when measuring the 10 lower end pawl disk of shear rod that case 7 connects and contacting soil, make to slow down
Motor 21 stops reversion.Shear rod job key 17 drives transmission shaft 36,38 turns of transmission gear for controlling the rotation of servo motor 33
Dynamic, by meshing relation, reduction gearing 39 is rotated backward, so that 10 lower end pawl disc spins of shear rod are driven, blade shearing soil
Earth measures shearing force.Conical rod rises control key 18 and controls the rising of electric pushrod 29, and conical rod 11 is driven to rise.Under conical rod
It drops control key 19 and controls the decline of electric pushrod 29, make the circular cone probe injection soil of 11 lower end of conical rod.Depth registration key 20 is used
In record circular cone probe depth of penetration, declines in conical rod 11, when the circular cone probe of 11 lower end of conical rod will contact soil, press
Lower depth registration key 20 can reset the displacement data recorded on linear displacement transducer 31, thus measure circular cone probe 11 into
Enter the actual depth of soil.
Working principle of the present invention is as follows:
1 rubber suction face paste of vacuum chuck is made rubber suction cups and connect at the more flat and smooth surface of vehicle body first
It gapless and is come into full contact between contacting surface, guarantees that vacuum chuck 1 realizes maximum adsorption power, later lead to the bleeding point on sucker disk seat
It crosses adapter tube to connect with vacuum equipment, starts vacuum equipment, extract the air between rubber suction cups and vehicle body contact surface out, inhale vacuum
Fold absorption fixed function.
According to the adsorbed position of vacuum chuck 1, adjust the length of telescopic rod 4, make to measure case 7 far from half meter of vehicle body with
Outside, guarantee that the soil of measurement is not affected by the influence of driving factor, the fixed telescopic rod 4 of the clamping screw 3 on downward turn telescopic rod 4
Position.The ball head universal at 4 both ends of telescopic rod is adjusted later, and No. 1 ball head universal 2 and No. 2 ball head universal 5 is made simultaneously
With alloing to measure case 7 around 1 all-direction rotation of vacuum chuck, two can be locked when measuring case 7 and ground near normal
Retaining ring on ball head universal, fixation measuring angle, at this point, realizing that the installation steps of connection terminate with vehicle, into measurement
Stage.
In measuring phases, eight control keys on measurement 7 left side of case need to be only controlled.Press on & off switch 13 connect it is whole
The power supply of a instrument shows to LED display 12 and carries out next step operation after number i.e. control circuit is connected.First press circular cone
Bar declines control key 19, and control electric pushrod 29 pushes conical rod 11 to move downward, after conical rod 11 stretches out shear rod 10, then
Secondary conical rod decline control key 19 of pressing stops decline, then presses measurement case decline control key 16, starts decelerating motor 21, band
Dynamic lead screw 26 rotates, and feed screw nut 25 moves upwards, and since coupling part is connect by connecting rod 6 with feed screw nut 25, and protects
Fixation is held, so entire control cabinet 7 moves downward, when conical rod 11 will contact soil, presses measurement case decline control again
Key 16 processed stops decline, and both hands, which are held with a firm grip, measures the foregrip 8 and rear handle 9 of case 7, the circular cone probe of adjustment 11 lower end of conical rod with
The relative position of soil makes the vertical injection soil of circular cone probe energy, depth record key 20 is pressed at this time, by linear displacement transducer
31 intrinsic displacement zeros datas.Continue to press conical rod decline control key 19, makes circular cone probe injection soil, measure the control in case 7
Circuit processed receive the signal on pressure sensor 30 and pass through relevant calculation: the pressure value that pressure sensor 30 is obtained divided by
The projected area of circular cone probe, as cone index.Finally depth data and cone index value real-time display are shown in LED
On screen 12, the measurement of soil cone index is completed.
Into after soil shear measuring phases, presses conical rod and rise control key 18, electric pushrod 29 is controlled, by circular cone
In the hollow portion of income shear rod 10 completely of bar 11, then measurement case decline control key 16 is pressed, makes to measure 7 cabinet lower end of case
Shear rod 10 completely attaches to soil, can be made in shear rod 10 by foregrip 8 and the adjustment measurement of rear handle 97 position of case at this time
Pawl disk lower end surface completely attaches to soil, can press shear rod job key 17, starts servo motor 33, passes through 36 band of transmission shaft
Dynamic phase gear rotation, the shear rod 10 being connected in reduction gearing 39 rotate synchronously, and the blade of pawl disk lower end shears soil.
Control circuit calculates according to following formula and shows the shearing force of last gained soil on LED display 12:
In formula: TmThe maximum twist torque (Nm) measured for torque sensor；R is pawl dish external diameter (m)；R is in pawl disk
Diameter (m)
If you need to repeatedly measure, reset key 14 is pressed, after zeros data on LED display 12, repeats above-mentioned measuring process
?.
Claims (6)
1. the vehicle load measurement instrument that one kind can measure shearing force and cone index simultaneously, which is characterized in that including one for adsorbing
Vacuum chuck (1) on vehicle body, vacuum chuck (1) is hinged by No. 1 ball head universal (2) and one end of telescopic rod (4), stretches
The other end of contracting bar (4) is hinged by No. 2 ball head universals (5) and one end of connecting rod (6), the right side of measurement case (7)
Vertical through slot is provided on end face, the other end of connecting rod (6) passes through the lead screw in the through slot and measurement case (7) of measurement case (7)
Feed screw nut (25) in nut body is fixedly connected by connecting plate (24), the upper end of the lead screw (26) in leadscrew-nut mechanism
It is fixedly connected by first shaft coupling (23) with the output shaft of decelerating motor (21), the lower end of lead screw (26) passes through deep groove ball bearing
(27) it is connected on the lower wall inner surface of measurement case (7) with fixing seat (28), the lower end of the telescopic end of an electric pushrod (29)
It is threadedly coupled with the electric interfaces of a pressure sensor (30), the pressure interface of pressure sensor (30) lower end and a lower end
Conical rod (11) with circular cone probe is fixedly connected, the measurement end of a linear displacement transducer (31) and electric pushrod (29)
It is fixedly connected, decelerating motor (21), the control terminal of electric pushrod (29) and linear displacement transducer (31) pass through upper mounted plate
(22) it is fixed in measurement case (7), the upper end of the shear rod (10) of a Hollow circular beam structure passes through measurement case (7) lower wall and sets
The reduction gearing (39) set in measurement case (7) is fixedly connected, the lower end of shear rod (10) be fixedly installed one it is cylindrical
Pawl disk, pawl face interval of trying to get to the heart of a matter are evenly provided with four cuboid blades, and the upper end of conical rod (11) passes through shear rod (10) center
It is fixedly connected after through-hole and measurement case (7) lower wall with the pressure interface of pressure sensor (30), a servo motor (33) passes through
One bottom plate (34) is fixed in measurement case (7), and the output shaft of servo motor (33) passes through a second shaft coupling
(35) it is connect with the upper end of a transmission shaft (36), the lower end of transmission shaft (36) is fixedly connected with a transmission gear (38), is passed
Moving gear (38) is engaged with reduction gearing (39), and the number of teeth of reduction gearing (39) is greater than the number of teeth of transmission gear (38), a method
The torque for measuring transmission shaft (36), setting in measurement case (7) is arranged on transmission shaft (36) in blue formula torque sensor (37)
There are control circuit, the control of decelerating motor (21), pressure sensor (39), linear displacement transducer (31), electric pushrod (29)
End, servo motor (33) and flange type torque sensor (37) are connected to the control circuit by harness.
2. one kind according to claim 1 can measure the vehicle load measurement instrument of shearing force and cone index simultaneously, feature exists
In vacuum chuck (1) includes rubber suction face and sucker disk seat, and for adsorption plane for being adsorbed on vehicle body, there is a use in sucker disk seat lower end
In the port that the exhaust tube with vacuum equipment is connect, sucker disk seat top is from threaded, No. 1 ball head universal (2) and No. 2 bulbs ten thousand
It is the ball head universal of included retaining ring, the suction at the retaining ring end and vacuum chuck (1) of No. 1 ball head universal (2) to section (5)
The threaded connection on disk seat top, No. 1 ball head universal (2) bulb end are connect with one end of telescopic rod (4), No. 2 ball head universals
(5) retaining ring is connect with the other end of telescopic rod (4), and the bulb end of No. 2 ball head universals (5) is connect with connecting rod (6).
3. one kind according to claim 2 can measure the vehicle load measurement instrument of shearing force and cone index simultaneously, feature exists
In the telescopic rod (4) is two sections of hollow round bars of nested type, and two sections of telescopic rod (4) are respectively outer loop bar and inner sleeve
Bar, outer loop bar and inner rod nest together, and have a clamping screw (3), the clamping screw in outer loop bar and inner rod junction
(3) it is threadedly coupled with the threaded hole on outer loop bar, when tightening clamping screw (3), stud base contacts inner rod, prevents inner-outer sleeve
Fixed function is played in bar relative motion, and outer loop bar and inner rod have internal screw thread, and inner rod front end passes through screw thread and No. 1 bulb
The bulb end of universal joint (2) connects, and housing rod rear end is connect also by internal screw thread with the retaining ring of No. 2 ball head universals (5).
4. one kind according to claim 1 can measure the vehicle load measurement instrument of shearing force and cone index simultaneously, feature exists
In electric pushrod (29) lower end is provided with vertical threaded hole for connecting with the electric interfaces screw thread above pressure sensor (30)
It connects, is provided with horizontal tapped through hole, the measurement end of linear displacement transducer (31) above the vertical threaded hole of electric pushrod (29)
Bottom is provided with threaded hole, connects the threaded hole and linear displacement transducer (31) of bolt (32) and electric pushrod (29) lower end level
Measurement end bottom threaded hole be threadedly coupled, electric pushrod (29) and the measurement end of linear displacement transducer (31) are fixed.
5. one kind according to claim 1 can measure the vehicle load measurement instrument of shearing force and cone index simultaneously, feature exists
In, be fixedly installed on the front end face of the measurement case (7) for operator grip foregrip (8), measurement case (7) after
It is provided on end face and foregrip (8) symmetrical rear handle (9).
6. one kind according to claim 1 can measure the vehicle load measurement instrument of shearing force and cone index simultaneously, feature exists
In, it is fixedly installed one piece of LED display (12) in the left end face of the measurement case (7), it is aobvious positioned at LED in left end face
It is provided on & off switch (13), reset key (14), measurement case below display screen (12) and rises control key (15), measurement case decline control
Key (16), shear rod job key (17), conical rod rise control key (18), conical rod decline control key (19) and depth registration key
(20), LED display (12), on & off switch (13), reset key (14), measurement case rise control key (15), measurement case decline control
Key (16), shear rod job key (17), conical rod rise control key (18), conical rod decline control key (19) and depth registration key
(20) it is connect by harness with the control circuit measured in case (7).
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| CN201810647662.6A CN108981972B (en) | 2018-06-22 | 2018-06-22 | Vehicle-mounted measuring instrument capable of measuring shearing force and cone index simultaneously |
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| CN201810647662.6A CN108981972B (en) | 2018-06-22 | 2018-06-22 | Vehicle-mounted measuring instrument capable of measuring shearing force and cone index simultaneously |
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| CN108981972B CN108981972B (en) | 2023-09-29 |
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