CN211235485U - Multi-jaw clamp and drawing instrument - Google Patents
Multi-jaw clamp and drawing instrument Download PDFInfo
- Publication number
- CN211235485U CN211235485U CN201922273620.3U CN201922273620U CN211235485U CN 211235485 U CN211235485 U CN 211235485U CN 201922273620 U CN201922273620 U CN 201922273620U CN 211235485 U CN211235485 U CN 211235485U
- Authority
- CN
- China
- Prior art keywords
- clamping
- plate
- disc
- connecting block
- lifting rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a multi-jaw clamp and a drawing instrument, which comprises a lifting rod, a drawing disc, a supporting disc and a plurality of jaw heads; the bottom of the lifting rod is fixed at the center of the top of the drawing plate; the drawing disc is positioned at the top of the supporting disc; the claw head comprises connecting blocks, the connecting blocks are uniformly arranged on the side face of the supporting disc, the connecting blocks are hinged with the supporting disc, and the hinged shaft is parallel to the top face of the drawing disc; the top of the connecting block is positioned above the drawing disc, and the connecting block inclines towards the center of the drawing disc; the bottom of the connecting block is connected with a clamping plate. The clamping speed is high, the clamping is firm, the test piece cannot be damaged, and the measured data is more real and reliable.
Description
Technical Field
The utility model belongs to the road surface test field relates to a multi-jaw anchor clamps and draw appearance.
Background
In recent years, with the increase of traffic volume and the increase of heavy-duty vehicles in China, diseases caused by poor interlayer bonding performance of asphalt pavement structural layers are increased gradually, for example: push, hug, and cracking of semi-rigid substrates and composite pavements, and the like. The interlayer bonding effect between the asphalt layer and the asphalt layer, between the semi-rigid base layer and the asphalt surface layer and between the cement concrete pavement and the asphalt layer has great influence on the pavement function. Therefore, the key for ensuring the interlayer bonding quality of the asphalt pavement is to detect the interlayer bonding effect by using a reasonable method and select reasonable indexes for evaluation.
The drawing strength index is an important index for evaluating the interlayer bonding performance of the asphalt pavement by detecting the drawing force between two structural layers, and a commonly used detection device is a drawing instrument.
When the traditional drawing instrument is used for drawing tests, AB glue or epoxy resin is needed to be adopted to connect the upper part of the test piece with the bonding disc, and the drawing tests are started after the bonding agent is completely hardened and solidified. On one hand, the cementing quality is difficult to control by a cementing mode, so that the test piece is wasted, and the drawing effect is not ideal. The surface of the test piece is rough usually, the cementation firmness of each test piece and the bonding disc is difficult to guarantee, the cementation interface is firstly pulled open and damaged compared with the interface to be tested due to the insecure cementation, and the data discreteness obtained by seriously damaging the test piece is large due to repeated bonding again. On the other hand, cementing the test piece takes a long time. Before the AB glue is used, the glue is uniformly mixed in proportion and then is smeared on a test piece and a bonding disc, and after the glue is well bonded, the test can be carried out until the glue is firmly bonded.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a multi-jaw anchor clamps and draw the appearance, the centre gripping is fast, and the centre gripping is firm, can not cause destruction to the test piece, makes the data that record more true and reliable.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a multi-claw-head clamp comprises a lifting rod, a drawing disc, a supporting disc and a plurality of claw heads;
the bottom of the lifting rod is fixed at the center of the top of the drawing plate; the drawing disc is positioned at the top of the supporting disc;
the claw head comprises connecting blocks, the connecting blocks are uniformly arranged on the side face of the supporting disc, the connecting blocks are hinged with the supporting disc, and the hinged shaft is parallel to the top face of the drawing disc; the top of the connecting block is positioned above the drawing disc, and the connecting block inclines towards the center of the drawing disc; the bottom of the connecting block is connected with a clamping plate.
Preferably, the clamping plate comprises an inner layer plate and an outer layer plate, the inner layer plate and the outer layer plate are arranged in a clearance mode to form a double-layer structure, the number of the outer layer plates is two, the outer side edges of the two outer layer plates are respectively connected with the two side edges of the inner layer plate, the inner side edges of the two outer layer plates are arranged in a clearance mode, a plurality of clamping grooves facing the outer side plates are formed in the inner side edges of the outer layer plates, the clamping grooves are arranged in parallel along the inner side edges of the outer layer plates, and the clamping grooves in the inner side edges of the; clamping pieces are arranged in the double layers, through holes are formed in the positions, close to the tops, of the clamping pieces, and the through holes are located between gaps of the inner side edges of the two outer layer plates; the clamping piece passes through the through hole through the T-shaped piece and is buckled on the clamping groove.
Further, the distance between adjacent clamping grooves on the inner side edge of the outer plate is 5 mm.
Preferably, the clamping plate is an arc-shaped plate.
Preferably, a rubber pad is arranged on the clamping surface of the clamping plate.
Preferably, the top of the lifting rod is provided with a threaded hole.
Preferably, the top of the connecting block is provided with a limiting block, the limiting block is partially positioned outside the connecting block, and the bottom of the limiting block is parallel to the drawing disc.
A drawing instrument comprises a tension sensor, wherein one tension end of the tension sensor is connected with the top of a lifting rod of a multi-jaw clamp.
Preferably, one of the tension ends of the tension sensor is connected with the front end of a pull rod, the rear end of the pull rod is a threaded end, and the rear end of the pull rod is in threaded connection with a threaded hole in the top of the lifting rod.
Compared with the prior art, the utility model discloses following beneficial effect has:
anchor clamps are provided with a plurality of claw heads, and the connecting block is articulated with the supporting disk, draws the dish to be located between a plurality of connecting blocks, because the connecting block orientation draws a central slope of dish, when making to draw the dish promoted, the connecting block top moves to the outside, and the grip block of connecting block bottom presss from both sides tight test piece gradually, has realized the automatic centre gripping of test piece, and the centre gripping is fast, and the centre gripping is firm, can not cause destruction to the test piece, makes the data of surveying many times more true and reliable.
Furthermore, a clamping piece is arranged in the interlayer of the clamping plate, the through hole for the T-shaped piece to penetrate through the clamping piece is buckled on the clamping groove of the outer plate, the clamping piece is fixed in the clamping plate, the clamping piece is matched with the clamping grooves in different positions through the T-shaped piece, the clamping piece is extended out of and retracted back from the clamping plate, the length of a clamping part is prolonged, and the clamping device is suitable for high test pieces.
Furthermore, the clamping plate is an arc-shaped plate, so that the contact area between the clamping surface and the test piece is increased, and the clamping effect is improved.
Furthermore, the rubber pad is arranged on the clamping surface, so that the friction force between the clamping surface and the test piece during clamping is improved, the clamping effect is improved, and the flexible buffer exists between the clamping piece and the test piece, so that the test piece is prevented from being damaged by the overlarge rigidity.
Further, the connecting block top is provided with the stopper, can promote to the highest time drawing the dish, and the stopper is spacing drawing the dish, prevents to draw the dish and breaks away from.
Drawings
FIG. 1 is a schematic structural view of the multi-jaw clamp of the present invention;
FIG. 2 is a schematic diagram of the structure of the clamping plate of the present invention;
fig. 3 is the drawing instrument with multi-jaw testing clamp of the utility model.
Wherein: 1-lifting a pull rod; 2-drawing the disc; 3-a support disk; 4, connecting blocks; 5-clamping the plate; 6-a limiting block; 7-inner layer plate; 8-outer laminates; 9-a clip; 10-a card slot; 11-a through hole; 12-a T-piece; 13-a tension sensor; 14-a pull rod.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
as shown in figure 1, for the multi-jaw clamp of the present invention, it comprises a lifting rod 1, a drawing plate 2, a supporting plate 3 and a plurality of jaws. This embodiment employs three claw heads.
The bottom of the lifting rod 1 is fixed at the center of the top of the drawing disc 2, and the top of the lifting rod 1 is provided with a threaded hole. The drawing plate 2 is placed on top of the support plate 3.
The claw head includes connecting block 4, and 3 sides of supporting disk all need be provided with three extension piece, and three connecting block 4 evenly sets up by three extension piece, encloses into circularly, and connecting block 4 is articulated with the extension piece, and drawing dish 2 is located between three connecting block 4, and the articulated shaft is parallel with 2 top surfaces of drawing dish, forms lever mechanism. The top of the connecting block 4 is positioned above the drawing disc 2, and the connecting block 4 inclines towards the center of the drawing disc 2; the bottom of the connecting block 4 is connected with a clamping plate 5.
The top of the connecting block 4 is provided with a limiting block 6, the part of the limiting block 6 is positioned outside the connecting block 4, and the bottom of the limiting block 6 is parallel to the drawing disc 2.
As shown in fig. 2, the clamping plate 5 comprises an inner plate 7 and an outer plate 8, the inner plate 7 and the outer plate 8 are arranged in a clearance manner to form a double-layer structure, the number of the outer plates 8 is two, the outer sides of the two outer plates 8 are respectively connected with the two sides of the inner plate 7, the inner sides of the two outer plates 8 are arranged in a clearance manner, the inner side of the outer plate 8 is provided with a plurality of clamping grooves 10 facing the outer side plate, the plurality of clamping grooves 10 are arranged in parallel along the inner side of the outer plate 8, the distance between adjacent clamping grooves 10 on the inner side of the outer plate 8 is 5mm, and the positions of the clamping grooves 10 on the inner sides of the two; a clamping piece 9 is arranged in the double layer, a through hole 11 is arranged at the position, close to the top, of the clamping piece 9, and the through hole 11 is positioned between the gaps of the inner side edges of the two outer layer plates 8; the clip 9 is fastened to the clip groove 10 by the T-shaped part 12 passing through the through hole 11.
The clamping piece 9 can extend out or retract from the bottom of the clamping plate 5, so that the clamp can be suitable for drawing tests of core samples with different thicknesses, and the drawing effect when the pavement structure layer is thick in the field test process is ensured.
The clamping plate 5 and the clamping piece 9 are both arc-shaped plates, and the part of the T-shaped part 12 matched with the clamping groove 10 is arc-shaped. The clamping surface of the clamping piece 9 is provided with a rubber pad which is positioned at the position of the clamping piece 9 close to the bottom and is parallel to the bottom edge of the clamping piece 9.
As shown in FIG. 3, for the drawing instrument, be provided with force sensor 13 in the drawing instrument, force sensor 13 one of them pulling force end is connected with the front end of pull rod 14, and pull rod 14 rear end is the screw thread end, the screw hole threaded connection at pull rod 14 rear end and lifting rod 1 top.
After the clamping piece 9 clamps the test piece, when the lifting rod 1 and the drawing disc 2 move upwards, according to the lever principle, the larger the angle of the top of the three upper connecting blocks 4 is, the tighter the contact between the clamping piece 9 on the lower part and the surface of the test piece is, the stress balance of the test piece is enabled not to fall through the friction force between the clamping piece 9 and the surface of the test piece, the larger the upward pulling force of the pull rod 14 is, the tighter the fit between the clamping piece 9 and the test piece is, and the larger the lateral pressure is. Consequently, lean on increase lateral pressure to increase frictional force on the one hand, on the other hand leans on the rubber pad increase coefficient of friction of clamping piece 9 inner wall to increase frictional force, just so can guarantee drawing the great and even of in-process test piece atress, compare in glued accuracy nature of having guaranteed test data, simplified experimental operation, set up the core appearance that clamping piece 9 also can be applicable to multiple structural layer thickness, both satisfied the less core appearance of indoor self-control thickness, also can satisfy the core appearance of the different road surface structural layer thickness of scene.
The specific indoor drawing test process is as follows.
(1) Manufacturing: according to the composition of the material of the test piece to be tested, the test piece with the diameter of 100mm or 150mm is formed in a laboratory, and after curing and cooling, the two test pieces are bonded by spraying a bonding material.
(2) Fixing a test piece: and selecting one end with a smoother surface of the test piece, and adhering the test piece on the base by using AB glue or epoxy resin to ensure that the gluing is firm.
(3) Installing an instrument: firstly, adjusting the length of a clamping piece 9 according to the thickness of a core sample to be measured, so that the clamping piece 9 is clamped at a position 2-3cm higher than an interface to be measured; secondly, the three limiting blocks 6 are held by hands to enable the limiting blocks 6 to be close to the lifting rod 1 to be folded, the clamping pieces 9 at the lower part are opened accordingly, the clamping pieces 9 are vertically placed on the upper part of the to-be-tested piece and are 2-3cm higher than the to-be-tested interface, the limiting blocks 6 are loosened by hands, the lifting rod 1 is lifted upwards, and the clamping pieces 9 clamp the to-be-tested piece.
(4) Drawing: and starting an indoor drawing test after the lifting rod 1 is connected with a tension sensor 13 of the drawing instrument.
The specific field drawing test process is as follows.
(1) Selecting points: selecting a test point on a traffic lane, and arranging a closed area around the test point;
(2) drilling a core: drilling a core sample with the diameter of 100mm or 150mm at the point selection position, drilling the core sample with the depth of 0.5cm-1cm deeper than the position to be detected, and blowing the water on the surface of the core sample by using a high-pressure blower without taking out the core sample;
(3) installing an instrument: firstly, adjusting the length of a clamping piece 9 according to the thickness of a core sample to be measured, so that the clamping piece 9 is clamped at a position 2-3cm higher than an interface to be measured; secondly, the three limiting blocks 6 are held by hands to enable the limiting blocks 6 to be close to the lifting rod 1 to be folded, the clamping pieces 9 at the lower part are opened accordingly, the clamping pieces 9 are vertically placed on the upper part of the to-be-tested piece and are 2-3cm higher than the to-be-tested interface, the limiting blocks 6 are loosened by hands, the lifting rod 1 is lifted upwards, and the clamping pieces 9 clamp the to-be-tested piece.
(4) Drawing: and starting a field drawing test after the lifting rod 1 is connected with a tension sensor 13 of the drawing instrument.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (9)
1. The multi-claw-head clamp is characterized by comprising a lifting rod (1), a drawing disc (2), a supporting disc (3) and a plurality of claw heads;
the bottom of the lifting rod (1) is fixed at the center of the top of the drawing disc (2); the drawing plate (2) is positioned at the top of the supporting plate (3);
the claw head comprises connecting blocks (4), the connecting blocks (4) are uniformly arranged on the side face of the supporting disc (3), the connecting blocks (4) are hinged with the supporting disc (3), and a hinge shaft is parallel to the top face of the drawing disc (2); the top of the connecting block (4) is positioned above the drawing disc (2), and the connecting block (4) inclines towards the center of the drawing disc (2); the bottom of the connecting block (4) is connected with a clamping plate (5).
2. The multi-jaw clamp according to claim 1, characterized in that the clamping plate (5) comprises an inner plate (7) and an outer plate (8), the inner plate (7) and the outer plate (8) are arranged in a clearance manner to form a double-layer structure, the number of the outer plates (8) is two, the outer sides of the two outer plates (8) are respectively connected with two sides of the inner plate (7), the inner sides of the two outer plates (8) are arranged in a clearance manner, the inner side of the outer plate (8) is provided with a plurality of clamping grooves (10) facing the outer plate, the clamping grooves (10) are arranged in parallel along the inner sides of the outer plates (8), and the positions of the clamping grooves (10) on the inner sides of the two outer plates (8) correspond; a clamping piece (9) is arranged in the double layer, a through hole (11) is arranged at the position, close to the top, of the clamping piece (9), and the through hole (11) is positioned between the gaps of the inner sides of the two outer layer plates (8); the clamping piece (9) passes through the through hole (11) through the T-shaped piece (12) and is buckled on the clamping groove (10).
3. A multi-jaw clamp according to claim 2 wherein the spacing between adjacent slots (10) on the inner side of the outer plates (8) is 5 mm.
4. A multi-jaw clamp according to claim 1, characterized in that the clamping plate (5) is an arc-shaped plate.
5. A multi-jaw clamp according to claim 1, characterized in that the clamping surfaces of the clamping plates (5) are provided with rubber pads.
6. The multi-jaw clamp according to claim 1, characterized in that the top of the lifting rod (1) is provided with a threaded hole.
7. The multi-jaw clamp according to claim 1, wherein a limiting block (6) is arranged at the top of the connecting block (4), the limiting block (6) is partially positioned at the outer side of the connecting block (4), and the bottom of the limiting block (6) is parallel to the drawing disc (2).
8. A drawing instrument, characterized by comprising a tension sensor (13), wherein one tension end of the tension sensor (13) is connected with the top of the lifting rod (1) of the multi-jaw clamp according to any one of claims 1-7.
9. The drawing instrument according to claim 8, characterized in that one of the pulling force ends of the pulling force sensor (13) is connected with the front end of the pulling rod (14), the rear end of the pulling rod (14) is a threaded end, and the rear end of the pulling rod (14) is in threaded connection with a threaded hole at the top of the lifting rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922273620.3U CN211235485U (en) | 2019-12-17 | 2019-12-17 | Multi-jaw clamp and drawing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922273620.3U CN211235485U (en) | 2019-12-17 | 2019-12-17 | Multi-jaw clamp and drawing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211235485U true CN211235485U (en) | 2020-08-11 |
Family
ID=71921468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922273620.3U Expired - Fee Related CN211235485U (en) | 2019-12-17 | 2019-12-17 | Multi-jaw clamp and drawing instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211235485U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113620204A (en) * | 2021-08-23 | 2021-11-09 | 鞍钢集团矿业有限公司 | Special tool for disassembling and assembling wet disc brake assembly of mining truck and using method |
-
2019
- 2019-12-17 CN CN201922273620.3U patent/CN211235485U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113620204A (en) * | 2021-08-23 | 2021-11-09 | 鞍钢集团矿业有限公司 | Special tool for disassembling and assembling wet disc brake assembly of mining truck and using method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211235485U (en) | Multi-jaw clamp and drawing instrument | |
| CN203101381U (en) | Novel concrete early-age shrinkage deformation tester | |
| CN207923557U (en) | Measure the sample preparation device of adhesive tensile shear strength | |
| CN110873691A (en) | Multi-jaw clamp and drawing instrument | |
| CN110108567B (en) | Ceramic matrix composite interlaminar tensile test piece, and preparation method and test method thereof | |
| CN111060604B (en) | Acoustic emission sensor fixing device and use method thereof | |
| CN107246995A (en) | A kind of multi-functional clamp determined for concrete splitting tensile strength | |
| CN105973801A (en) | Test method for stretching and peeling of plastic-metal composite material | |
| CN102221523A (en) | Method for testing bonding force of glass clad edge | |
| CN102539320B (en) | Method for detecting tensile bond strength of masonry mortar and wall material | |
| CN201464348U (en) | Adhesive force testing device for casting binder of molding sand | |
| CN209589670U (en) | A kind of fixture for testing insulating board interfacial bonding strength | |
| CN206362686U (en) | Drawing type adhesion testing device | |
| CN208621446U (en) | A kind of and matching used fiber Push out test device of nano-hardness tester | |
| CN215727601U (en) | Standard forging die installation auxiliary device for coating adhesion detection | |
| AU2010201993A1 (en) | Apparatus and method for determining the tensile bond strength of a dental material | |
| CN211505165U (en) | Viscose performance test frock | |
| CN210221662U (en) | Shearing mechanism and shearing clamp for universal material testing machine | |
| CN212621837U (en) | Concrete slab intensity detection device for building | |
| CN114371126A (en) | Asphalt and aggregate interface adhesion damage and cohesiveness testing device and method | |
| CN206546286U (en) | A kind of adhesive tensile shear test piece mould | |
| CN206804422U (en) | A kind of fixture for fragile material tiny sample extension test | |
| CN208888045U (en) | A kind of reference block protective device of pull-out test | |
| CN209132063U (en) | A kind of mold tested for adhesive, finishing mucilage tensile bond strength | |
| KR20130028254A (en) | Test piece |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200811 Termination date: 20201217 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |