Summary of the invention
Technical matters to be solved by this invention is to overcome the shortcoming of above-mentioned several test bituminous pavement or bridge floor interlayer tensiometer, bituminous pavement or bridge floor interlayer shear power instrument, provide a kind of reasonable in design, simple in structure, in light weight, test data accurately and reliably, easy to carry, can test the pulling force of bituminous pavement or bridge floor interlayer and the interlaminar bonding strength tester for pavement of shearing force at the scene.
Solving the problems of the technologies described above the technical scheme that is adopted is: the left side on frame is provided with motor, the right side is provided with the speed reduction unit that links by gear train and motor, speed reduction unit is provided with photoelectric encoder and Programmable Logic Controller, Programmable Logic Controller links to each other with computing machine with photoelectric encoder by cable, being arranged with equalising torque bar and upper end and speed reduction unit in frame links, lower end and the joining control gear of eccentric throw-over gear, the torque sensor that the lower end of eccentric throw-over gear is provided with pulling force sensor or connects with shaft coupling is provided with clamping device in the lower end of pulling force sensor or torque sensor.
Speed reduction unit of the present invention is: casing is provided with the Box Cover that connects with bearing cap, bearing cap is provided with the scrambler support, in bearing cap, be provided with the worm gear that connects with the scrambler axle with worm mesh, scrambler axle and scrambler link, worm screw and gear train link, bottom at casing is provided with axle sleeve, is provided with bearing between worm gear and the bearing cap and between worm gear and the axle sleeve, is provided with backing plate in the bottom of casing.Control gear of the present invention is: be provided with the screw mandrel that upper and lower side is interspersed with feed screw nut's fixed mount in the feed screw nut's fixed mount that connects with backing plate, the upper end of screw mandrel connects with worm gear, the lower end connects with eccentric throw-over gear, be provided with the feed screw nut that bearing is installed up and down who links with screw mandrel in feed screw nut's fixed mount, the feed screw nut radially is provided with friction disc or friction block and processes porose or groove, feed screw nut's fixed mount is provided with the latch guide pin bushing, outer cover is set in the latch guide pin bushing spring and the movable latch of pegging graft of feed screw nut are housed, the end of latch guide pin bushing is provided with plug.Eccentric throw-over gear of the present invention is: the ring flange that connects with screw mandrel is arranged with eccentric mounting, in eccentric mounting, be provided with eccentric body, be provided with the lower end in the eccentric mounting lower end and shear the lower bolster that interface connects, eccentric body is provided with pearl frame and upper padding plate, the center of lower bolster is processed with the center pit of 22~36mm, the lower end of shearing interface is processed with hook, be provided with dust cap shearing the interface center, external diameter is that the upper end of the pull bar of 12~18mm passes that dust cap connects with eccentric body, the lower end is provided with swivel nut.Shaft coupling of the present invention is: radially be provided with pin on last half a coupler, last half a coupler is arranged with the cross shaft coupling body that connects with following half a coupler, and following half a coupler connects with torque sensor.
The feed screw nut of control gear of the present invention radially is processed with radially screw, radially is provided with friction disc or friction block in the screw, and circumferencial direction is processed with groove or radial hole between every adjacent two friction discs of feed screw nut or friction block.
Friction disc of the present invention or friction block are organic non-metal material piece or piece, or for mixing non-metallic material tablet or piece.
The lower surface of the last half a coupler of shaft coupling of saying of the present invention radially is processed with rectangular channel one, the upper surface of cross shaft coupling body radially is processed with the length and the wide rectangle projection that equates of the rectangular channel of wide and long and a last half a coupler, the lower surface of cross shaft coupling body radially becomes 90 ° position to be processed with a rectangle projection with the upper surface projection, the upper surface of following half a coupler is processed with a wide and long rectangular channel identical with the rectangle projection of cross shaft coupling body lower surface.
It is power that the present invention adopts motor, slow down through speed reduction unit, convert spiral lifting to through control gear again and move axially, can test the pulling force of bituminous pavement or bridge floor interlaminar bonding, another kind of for rotatablely moving, can test the torsional shear power of bituminous pavement or bridge floor interlayer.The present invention compares with bridge surface waterproof layer drawing instrument, the electronic boxshear apparatus of bridge surface waterproof layer, have reasonable in design, simple in structure, in light weight, test data accurately and reliably, easy to carry, can test advantages such as bituminous pavement or bridge floor interlaminar bonding intensity at the scene, can the newly-built of bituminous concrete road with the maintenance in be used to test different contact interfaces interlaminar bonding intensity, the cohesive strength that also can test other two kinds of different materials contact interfaces.
Embodiment
The present invention is described in more detail below in conjunction with drawings and Examples, but the invention is not restricted to these embodiment.
Embodiment 1
In Fig. 1,2,3, the interlaminar bonding strength tester for pavement of present embodiment is by photoelectric encoder 1, speed reduction unit 2, control gear 3, eccentric throw-over gear 4, equalising torque bar 5, pulling force sensor 6, frame 7, clamping device 8, computing machine 9, driven sprocket 10, chain 11, drive sprocket 12, Programmable Logic Controller 13, motor 14, pin 15, go up half a coupler 16, cross shaft coupling body 17, half a coupler 18, torque sensor 19 connect and constitute down, wherein sells 15, goes up half a coupler 16, cross shaft coupling body 17, half a coupler 18 is connected into shaft coupling down.
Left side on frame 7 is installed with motor 14 with the screw threads for fastening connector, motor 14 is for the invention provides power, right side on frame 7 is with the screw threads for fastening connector speed reduction unit 2 that has been fixedly connected, with the connector key connecting drive sprocket 12 is installed on the output shaft of motor 14, driven sprocket 10 and Programmable Logic Controller 13 and photoelectric encoder 1 are installed on the speed reduction unit 2, the model of Programmable Logic Controller 13 is DVP14SST2, be the market sale commodity, drive sprocket 12 links with driven sprocket 10 usefulness chains 11.This sprocket wheel chain drive also can be adopted the gear train of Machine Design routine, as belt gear, gear drive, worm and gear transmission.Photoelectric encoder 1 is used to write down the angular velocity displacement of the elongation displacement of tested bitumen mixture specimen and rotation and converts electric signal to and outputs to Programmable Logic Controller 13, the electric signal of 13 pairs of inputs of Programmable Logic Controller is handled, the digital signal of handling is outputed to computing machine 9, demonstrate the result by computing machine 9.7 times equalising torque bar 5 is installed in frame, 7 times control gear 3 is installed also in frame, the upper end of control gear 3 and speed reduction unit 2 link, the lower end links by screw thread and eccentric throw-over gear 4, the lower end of eccentric throw-over gear 4 links by screw thread and pulling force sensor 6, the pulling force sensor 6 of present embodiment is a static sensor, and model is that JN338F is the commodity of selling on the market, also can adopt the force transducer of other model, adopt the force transducer of different ranges, can survey the power of different sizes.The lower end of pulling force sensor 6 is by the screw threads for fastening connector clamping device 8 that has been fixedly connected, and tested bitumen mixture specimen is installed in the clamping device 8 during test.When motor 14 rotation, through the worm and gear transmission, speed reduction unit 2 slows down, and will the rotatablely move straight line that converts vertical direction to of control gear 3 moves and rotatablely moves, or only rotates, and eccentric throw-over gear 4 is used to adjust the right alignment when surveying pulling force.Take down pulling force sensor 6, torque sensor 19 is installed in eccentric throw-over gear 4 lower ends by shaft coupling, the present invention can test the torsional shear power of bitumen mixture specimen.
Fig. 3 has provided the connect synoptic diagram of torque sensor 19 with shaft coupling.In Fig. 3, the shaft coupling of present embodiment is made of pin 15, last half a coupler 16, cross shaft coupling body 17,18 connections of following half a coupler.The upper end of last half a coupler 16 radially is equipped with pin 15, when testing the torsional shear power of bitumen mixture specimen, pin 15 is hung over the lower end of eccentric throw-over gear 4.The lower surface center of last half a coupler 16 radially is processed with rectangular channel one, the upper surface center of cross shaft coupling body 17 radially is processed with a rectangle projection, the length of the rectangular channel of wide and the long and last half a coupler 16 of rectangle projection and wide equating, the rectangle projection is installed in the rectangular channel of half a coupler 16, radially become 90 ° position to be processed with a rectangle projection in the lower surface center of cross shaft coupling body 17 with the upper surface projection, the upper surface of following half a coupler 18 is processed with rectangular channel one, rectangular channel wide and long identical with the rectangle projection of cross shaft coupling body 17 lower surfaces, the rectangle projection of the lower surface of cross shaft coupling body 17 is installed in down in the rectangular channel of half a coupler 18 upper surfaces, and the upper end of torque sensor 19 is installed in down on the half a coupler 18.During the torsional shear power of test bitumen mixture specimen, the lower end of torque sensor 19 is linked with screw threads for fastening connector and clamping device 8.
In Fig. 4, the speed reduction unit 2 of present embodiment is to be connected by scrambler support 2-1, scrambler axle 2-2, bearing cap 2-3, Box Cover 2-4, worm gear 2-5, worm screw 2-6, casing 2-7, axle sleeve 2-8, backing plate 2-9 to constitute.In casing 2-7 upper end with the screw threads for fastening connector Box Cover 2-4 that has been fixedly connected, Box Cover 2-4 goes up with the screw threads for fastening connector bearing cap 2-3 that has been fixedly connected, bearing cap 2-3 goes up with the screw threads for fastening connector scrambler support 2-1 that has been fixedly connected, scrambler support 2-1 is used to install photoelectric encoder 1, worm gear 2-5 is installed in casing 2-7, worm gear 2-5 goes up with the screw threads for fastening connector scrambler axle 2-2 that has been fixedly connected, scrambler axle 2-2 and photoelectric encoder 1 link, worm gear 2-5 rotation, driving scrambler axle 2-2 rotates, between worm gear 2-5 and the bearing cap 2-3 head bearing is installed, worm screw 2-6 links with connector key and driven sprocket 10, in the bottom of casing 2-7 axle sleeve 2-8 is installed, lower bearing is installed between axle sleeve 2-8 and the worm gear 2-5, with the screw threads for fastening connector backing plate 2-9 that has been fixedly connected, backing plate 2-9 is used for linking with control gear 3 in the bottom of casing 2-7.
The control gear 3 of present embodiment is to be connected by feed screw nut 3-1, jackscrew 3-2, rubber blanket 3-3, feed screw nut's fixed mount 3-4, screw mandrel 3-5, latch guide pin bushing 3-6, spring 3-7, plug 3-8, latch 3-9 to constitute.Feed screw nut's fixed mount 3-4 is fixedly connected with screw threads for fastening connector and backing plate 2-9, the upper and lower side of screw mandrel 3-5 is interspersed with feed screw nut's fixed mount 3-4, the upper end of screw mandrel 3-5 links with connector key and worm gear 2-5, the lower end connects with eccentric throw-over gear 4, in feed screw nut's fixed mount 3-4 feed screw nut 3-1 is installed, feed screw nut 3-1 connects with screw mandrel 3-5 by screw thread, feed screw nut 3-1 is equipped with bearing up and down in feed screw nut's fixed mount 3-4, the radial equipartition of feed screw nut 3-1 is processed with 4 radially screws, 4 radially are equipped with rubber blanket 3-3 in the screw, rubber blanket 3-3 is an embodiment of friction disc or friction block, also can adopt bakelite sheet or piece, organic non-metal material piece or piece, mix non-metallic material tablet or piece.Radially by thread connection jackscrew 3-2 is installed in the screw, adjust jackscrew 3-2, rubber blanket 3-3 can be contacted with screw mandrel 3-5, be used to increase the friction force between screw mandrel 3-5 and the feed screw nut 3-1, radially be processed with 1 road groove between the screw every adjacent two of feed screw nut 3-1 circumferencial direction, the left radial of feed screw nut's fixed mount 3-4 is processed with screw.By thread connection latch guide pin bushing 3-6 is arranged in the screw on feed screw nut's fixed mount 3-4, in latch guide pin bushing 3-6, latch 3-9 is installed, the outer cover of latch 3-9 is equipped with spring 3-7, the left end of latch guide pin bushing 3-6 is equipped with plug 3-8 by thread connection, the screw that the right-hand member of latch 3-9 stretches out the right-hand member of latch guide pin bushing 3-6 and passes feed screw nut's fixed mount 3-4 inserts in the circumference slotted eye of feed screw nut 3-1, when worm gear 2-5 drove screw mandrel 3-5 rotation, screw mandrel 3-5 moved up and down and rotates.When the right-hand member of latch 3-9 was pulled out in the circumference slotted eye of feed screw nut 3-1, screw mandrel 3-5 and feed screw nut 3-1 rotated together, realized the control of changing mutually with translation motion rotatablely moving.
In Fig. 5, the eccentric throw-over gear 4 of present embodiment is made of eccentric mounting 4-1, eccentric body 4-2, shearing interface 4-3, pull bar 4-4, swivel nut 4-5, dust cap 4-6, lower bolster 4-7, pearl frame 4-8, upper padding plate 4-9, ring flange 4-10 connection.Ring flange 4-10 connects with screw mandrel 3-5 by screw thread, ring flange 4-10 goes up and links with screw threads for fastening connector and eccentric mounting 4-1, eccentric body 4-2 is installed in eccentric mounting 4-1, eccentric body 4-2 is shaped as disc-shaped structure, lower end at eccentric mounting 4-1 is connected with lower bolster 4-7 with the screw threads for fastening connector, pearl frame 4-8 is installed between eccentric body 4-2 and the lower bolster 4-7, the upper surface of pearl frame 4-8 is equipped with upper padding plate 4-9, the center of eccentric body 4-2 is processed with screw, the center of lower bolster 4-7 is processed with the center pit of 30mm, the lower end of lower bolster 4-7 is connected with the screw threads for fastening connector and shears interface 4-3, the lower end of shearing interface 4-3 is processed with the flute profile hook, during torsional shear power that flute profile hook is used to test bitumen mixture specimen shaft coupling being installed uses, in shearing interface 4-3 center dust cap 4-6 is installed also, dust cap 4-6 is a cavernous body, the upper end of pull bar 4-4 is passed dust cap 4-6 and is installed in the center screw of eccentric body 4-2 by screw thread, the lower end is hung with swivel nut 4-5, and swivel nut 4-5 is used for passing through thread connection with pulling force sensor 6.The pull bar 4-4 external diameter of present embodiment is 15mm, and pull bar 4-4 and eccentric body 4-2 can all around move in the center pit of lower bolster 4-7, are used to eliminate the bending stress of malalignment.
In Fig. 6, the clamping device 8 of present embodiment is made of column 8-1, set nut 8-2, elastic chuck cover 8-3, locking screw mandrel 8-4, elastic chuck 8-5 connection.The upper end usefulness screw threads for fastening connector of column 8-1 connects with the lower end of pulling force sensor 6, the lower end connects by screw thread and elastic chuck cover 8-3, be set with elastic chuck 8-5 in elastic chuck cover 8-3, elastic chuck 8-5 is used for clamping at the scene pulling force and the torsional shear power that bitumen mixture specimen is tested bitumen mixture specimen.In the center pit of elastic chuck 8-5 upper end, be set with locking screw mandrel 8-4, between the lower end of locking screw mandrel 8-4 and the elastic chuck 8-5 upper end inside surface bearing is installed, the upper end of locking screw mandrel 8-4 is interspersed with elastic chuck cover 8-3 upper surface and connects with set nut 8-2 by screw thread, between the upper surface of the lower surface of set nut 8-2 and elastic chuck cover 8-3, be set with bearing outside the locking screw mandrel 8-4, clockwise set nut 8-2, elastic chuck cover 8-3 is risen and the generation elastic deformation, bitumen mixture specimen is clamped.
Embodiment 2
The lower bolster 4-7 center of the eccentric throw-over gear 4 of present embodiment is processed with the 22mm center pit, and the external diameter of pull bar 4-4 is 12mm.The connecting relation of other parts and parts is identical with embodiment 1.
Embodiment 3
The lower bolster 4-7 center of the eccentric throw-over gear 4 of present embodiment is processed with the 36mm center pit, and the external diameter of pull bar 4-4 is 18mm.The connecting relation of other parts and parts is identical with embodiment 1.