Large-scale outside micrometer error of indication testing tool
Technical field
The utility model relates to a kind of device that measurer is detected, and specifically relates to a kind of large-scale outside micrometer error of indication testing tool.
Background technology
Conventional, the error of indication of large-scale outside micrometer need be carried out the detection of the outside micrometer error of indication with large scale slip gauge or combination slip gauge when detecting; Because the slip gauge size is big more; Its foozle also increases accordingly, and its precision is on the low side, and then makes the composition error of combination slip gauge bigger; And it is very inconvenient to operate with large scale slip gauge or combination slip gauge, because size is difficult for holding level with both hands more greatly more, therefore can not measure accurately, and then produce measuring error; In addition, long detection time with large scale slip gauge or combination slip gauge, need take multiple measurements to confirm the error of indication, its work efficiency is low.
China utility model patent ZL92214122.3 discloses a kind of outside micrometer error of indication testing tool, and it is made up of positioning regulating mechanism and clamping device, and clamping device is made up of last holding frame and following holding frame; The two end is a clamp port, and the other end is hinged, has a mind to the horizontally-guided groove in the body of rod side of last holding frame; Positioning regulating mechanism is made up of the seat of honour, following and locating shaft; Following seat is connected on the gathering sill of holding frame, and can be along this fluted shaft to moving or being fixed by fixture, and the seat of honour is connected with following through the axis of guide on following; And can move up and down or fix along the axis of guide by fixture; Locating shaft is installed on the seat of honour, can axially move forward and backward or fixed by fixture along it, and the front end of locating shaft is equipped with steel ball.Adopt this scheme, though can the error of indication of milscale be detected because its coupling member is more and since the various foozles of each member cause in the engagement process connection built on the sand, certainly will reduce the precision that indicating value detects.
Summary of the invention
Be to solve the deficiency that exists in the prior art, the utility model provides a kind of large-scale outside micrometer error of indication testing tool that can realize that the error of indication to milscale accurately detects, and it is simple in structure, processing ease.
For realizing above-mentioned purpose; The large-scale outside micrometer error of indication testing tool of the utility model; Comprise clamping device and the positioning regulating mechanism that is equipped with clamping device, the test rod that described positioning regulating mechanism comprises supporting seat, spins with the supporting seat screw thread, described clamping device comprise support and locking pull bar; When accuracy detection; The support that is connected with the chi frame of milscale location, through being connected of the locking pull bar that is connected with the chi frame, the detection position that the supporting seat locking positioning can be contacted with the micrometric screw of milscale in the detection end that makes test rod.
As the qualification to aforesaid way, the screw rod that described locking pull bar comprises holder, is connected with holder is provided with first set nut on screw rod.
As further qualification, be provided with the U-shaped hole that supplies test rod to pass through on the top of support to aforesaid way.
Further qualification as to aforesaid way is connected with second set nut on test rod.
As the qualification to the utility model, holder is provided with the T shape chute that the nut to screw rod clamps.
As the qualification to the utility model, the detection end of described test rod is a semisphere.
As the qualification to aforesaid way, described support has with milscale chi frame and carries out the hook portion that hook is connected with the locking pull bar.
As further qualification to aforesaid way, the hook chamber that described hook portion has C shape.
Adopt technique scheme; Only pass through the cooperation that is connected of support and locking pull bar; In detection end that makes test rod and the detection position that the micrometric screw of milscale can contact, the position of the test rod when detecting is confirmed, unique the supporting seat locking positioning, the small variations when each web member of having avoided causing because of error connects; It is simple in structure, and is easy to use.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further to specify:
Structural representation when Fig. 1 measures state for the utility model;
Fig. 2 is the planar structure synoptic diagram of supporting seat;
Fig. 3 is the planar structure synoptic diagram of support;
Fig. 4 is the planar structure synoptic diagram of holder.
Among the figure: the 1-supporting seat; The 2-test rod; The 3-support; 4-chi frame; 5-locks pull bar; The 6-holder; The 7-screw rod; 8-first set nut; 9-U shape hole; 10-second set nut; 11-T type chute; 12-detects the end; The 13-micrometric screw; The 14-nut; 15-hook portion; The 16-through hole; 17-is inverted the U-shaped hole; The 18-threaded hole.
Embodiment
The large-scale outside micrometer error of indication testing tool of present embodiment; On overall construction design, comprise clamping device and positioning regulating mechanism; Wherein, positioning regulating mechanism is arranged on the chi frame 4 of milscale through clamping device locking, utilizes positioning regulating mechanism to detect then.
To shown in Figure 4, clamping device comprises support 3 and locking pull bar 5 by Fig. 1.The bottom of support 3 be provided with can with chi frame 4 hook portion 15 of hook mutually, connect the hook chamber of C type before and after this hook portion is provided with, be provided with a through hole 16 at the middle part of support 3, the top of support 3 is provided with a U-shaped hole; Locking pull bar 5 is made up of holder 6, screw rod 7 and two first set nuts 8; Can find out by Fig. 4; Holder 6 is provided with the hook portion 15 identical with support 3; And the T type chute 11 that before and after one end thereof is provided with, connects, this T type chute 11 can clamp cooperation mutually with the nut 14 of the screw rod 7 of perfect thread structure.
Positioning regulating mechanism comprises supporting seat 1 and test rod 2.Can be found out that by Fig. 2 the lower end of supporting seat 1 is provided with inverted u-shaped hole 17, the upper end is provided with logical threaded hole 18; The shaft of test rod 2 is provided with the screw thread that can match with the logical threaded hole of supporting seat 1, the detection end 12 of the top of its shaft for milscale is detected, and this detects end 12 is hemispherical dome structure, on test rod 2, can cooperate second set nut 10 is installed.
This large-scale outside micrometer error of indication testing tool in use; With the threaded portion of one of them first set nut, 8 screw-in screw rod 7, then screw rod 7 is passed the through hole 16 at support 3 middle parts, again another first set nut 8 is screwed in the end of screw rods 7; Second set nut 10 is screwed in test rod 2; Test rod 2 is screwed in the threaded hole 18 of supporting seat 1, and the U-shaped hole 9 of support 3 is between the supporting seat 1 and second set nut 10, screw rod 7 is passed in the inversion U-shaped hole 17 of supporting seat 1; And it is between support 3 and first first set nut 4; After with test rod 2 alignment micrometric screws 13, two first set nuts 8 of screwing lock together supporting seat 1, support 3, screw rod 7 threes.3 hook portions 15 are hooked on the chi frame 4 with support, when the installation of support 3, should make chi frame 4 that the hook portion of support 3 hangs over milscale near position intermediate.Then holder 6 is hooked on the chi frame 4, with the nut 14 of screw rod 7 slip into accomplish being connected of screw rod and holder 6 in the T shape chute after, the axis of screw rod 7 should with plumbness of support 3 maintenances.
Test rod 3 is continued to screw in supporting seats 1 contact with micrometric screw 13, and then test rod 2 is locked onto support 3 through second set nut 10 of screwing up to detecting end 12.At this moment, write down the registration of milscale, then at micrometric screw 13 with detect between the end 12 and put into gauge block, read the registration of milscale again, the difference through twice registration and the standard value of gauge block detect the error of this milscale indicating value.