A kind of survey instrument
Technical field
The utility model relates to a kind of measuring technique, especially for the survey instrument detecting the dolioform parameter value of screw spiral raceway.
Background technology
The dolioform spiral rolling track of screw rod is part key characteristic, if the swelling-waist shape of spiral rolling track is undesirable, causes performance curve in steering assembly experimentation defective, causes product assembly defective.At present, still do not have special instrument to the detection of the dolioform parameter of screw rod raceway, only judge with feel by during workman's rotating screw bolt, it is qualified to be difficult to accurately to judge whether.
Summary of the invention
The utility model object is to provide a kind of simple to operate, detection numerical control a kind of survey instrument accurately.
Realizing the utility model object technical scheme is, a kind of survey instrument, comprise clock gauge, it is characterized in that: back up pad is located on base plate, the upper surface of this back up pad is provided with horizontal V-type groove, vertical column is provided with at the rear side of described base plate, sliding sleeve is fixed on the plate that is connected with described column, guide pillar is sliding to be assigned in the hole of described sliding sleeve, the upper and lower end of described guide pillar be two stepped cylinder respectively cunning be assigned in the hole of described sliding sleeve upper plate hole and bottom plate, the cylinder of topping bar of guide pillar is arranged with stage clip; Described clock gauge is fixed on the dial framework that is connected with described column, and the measurement plate guide pillar outside sliding sleeve top board being provided with level is relative with the measuring head of clock gauge; The rear side of described back up pad V-type groove is provided with backup plate, is provided with the active grab of inclination in the front side of described back up pad V-type groove.The top of described sliding sleeve is provided with fixed handle, and the vertical hole guide pillar below stage clip being provided with flexible handle and sliding sleeve top is slippery.
The utility model has measurement data accurately and conveniently advantage compared with the prior art.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present utility model; Fig. 2 is the left view of Fig. 1.
Embodiment:
In conjunction with above-mentioned accompanying drawing, the utility model is described in detail, the upper surface of base plate 1 is provided with back up pad 2, this back up pad is provided with horizontal V-type groove, this V-type groove is provided with two steel balls 12 matched with screw spiral trough, vertical cylinder 15 is provided with in one end of described base plate, sliding sleeve is fixed on the plate that is connected with column, guide pillar 5 is sliding to be assigned in sliding sleeve 6 hole, the lower end of this guide pillar is connected a steel ball 4, one stepped cylinder is arranged at the top of described guide pillar, this stepped cylinder is sliding to be assigned in the hole of described sliding sleeve top cover, stepped cylinder between sliding sleeve top cover and the annular end face of guide pillar is provided with spring 7, clock gauge 10 is arranged on the dial framework 9 that is connected with sliding sleeve, the measuring head of clock gauge contacts with the measurement plate 11 of described guide rod outer end.Install during for the ease of measuring and take out measured part (screw rod), at the arranged outside handle of sliding sleeve, guide pillar arranges flexible handle 8, this flexible handle is sliding to be fitted in the elongated hole of sliding sleeve, arrange active grab 14 in the side of described back up pad V-type groove relative with the backup plate 13 of back up pad V-type groove opposite side, active grab is standard component.
Measuring method of the present utility model, the horizontal V-shape groove of back up pad places two steel balls matched with the spiral rolling track of measured screw rod, steel ball on guide pillar termination also matches with the spiral rolling track of tested screw rod, screw rod is placed on the steel ball in back up pad, handling active grab makes pressure head by after on screw rod pressure backup plate on the supporting plate, the steel ball of guide pillar lower end is made to be placed on the spiral rolling track of screw rod the inner or outer end, rotating screw bolt makes it retreat (or advance), spring makes the steel ball on guide pillar be close to the spiral rolling track of screw rod all the time, the changing value of the spiral rolling track diameter of screw rod measured continuously by clock gauge, , thus accurately measure whether qualified.After measuring, hold on sliding handle and move, measure after steel ball departs from screw rod and unclamp quick clip clencher simultaneously, just can take out screw rod, put into another screw rod, repeat above-mentioned measurement action, second screw rod is measured.