Summary of the invention:
Purpose of the present invention is exactly for can not adapting to of existing survey instrument existence defective in enormous quantities, the super-large diameter piece test, the ultra-large diameter accurate detector that provides are provided.
To achieve these goals, the present invention has adopted following technical scheme:
A kind of ultra-large diameter accurate detector is characterized in that comprising following ingredient:
The base plate of a, a strip;
B, an instrument holder is set above the base plate, connects a measurement instrument on the instrument holder;
C, a slide block and one are set above the base plate cooperate the chute that slides with slide block;
D, slide block are provided with an endpoint location pin, the lower end of endpoint location pin pass slide block and chute to base plate beyond;
The position that the other end of e, base plate is relative with the endpoint location pin is provided with two fixed locating studs, and these two fixed locating studs and endpoint location pin constitute three reference points of measuring workpieces diameter.
On the basis of above-mentioned basic technical scheme, following further perfect technical scheme can be arranged:
Be provided with spring between slide block and instrument holder, make slide block when not contacting with workpiece for measurement, the probe with measurement instrument does not form contact matching;
The middle part of described endpoint location pin, fixed locating stud is respectively equipped with a support ring, and the one side of support ring and base plate contact matching are measured when using, and rely on support ring to contact with the workpiece for measurement end face, avoid the direct contact workpiece of base plate;
Be respectively equipped with a benchmark locating ring in endpoint location pin, fixed locating stud lower end, contact with workpiece for measurement by the benchmark locating ring, its surface of contact is little, the convenient use;
A cam holder is set on base plate, a hinged lever and the handle that links to each other in the cam holder, an end of lever is provided with cam, cam and slide block one end formation contact matching, lever and above the base plate between also be provided with back-moving spring.By lever and handle thereof, make cam promote slide block and drive the endpoint location pin to break away from workpiece for measurement, handled easily.
The invention has the advantages that: can be adapted to measurements quick and precisely in enormous quantities, the super-large diameter parts, and simple to operate, precision is high, size accommodation is big.
For more detailed explanation the present invention, following accompanying drawing provides two most preferred embodiments.
Embodiment:
Embodiment one: as shown in Figure 1 and Figure 2, the ultra-large diameter accurate detector of a kind of measuring workpieces external diameter provided by the invention is characterized in that comprising ingredient:
One, the base plate 10 of a strip, its right side is provided with wide portions 10a;
Two, left side of face is provided with an instrument holder 2 on the base plate 10, connects the sleeve part of measurement instrument 1 feeler lever 3 on the instrument holder 2 by screw, and the position by screw adjusted fixed muffle part can adapt to the workpiece calibration of measuring different-diameter;
Three, near medium position a slide block 4 and a chute 18 that cooperates slip with slide block 4 are set above the base plate 10, between slide block 4 and instrument holder 2, be provided with spring 19, the thrust of spring 19 makes the probe 3 of slide block 4 away from measurement instrument 1 all the time, make slide block when not having measuring workpieces, the probe with measurement instrument does not form contact matching;
Four, connect an endpoint location pin 16 with screw on the slide block 4, the lower end of endpoint location pin 16 is passed slide block 4 and chute 18 and is extended beyond base plate 10 following.The middle part of endpoint location pin 16 is provided with a support ring 17, and the one side of support ring can cooperate with the end face of ring standard gauge 11 (or workpiece for measurement) with base plate 10 contact matching, another side.The lower end of endpoint location pin 16 is provided with the face of cylinder contact matching of a benchmark locating ring 15 and ring standard gauge 11 (or workpiece for measurement).
Five, the other end at base plate 10 is provided with wide portions 10a, the position relative with endpoint location pin 16 is provided with two fixed locating studs 12, this two fixed locating studs 12 and endpoint location pin 16 constitute three reference points of measurement standard ring gauge 11 (or workpiece) diameters, and promptly three reference points have directly write down the diameter data of ring standard gauge 11.When measuring workpieces, contact the difference of reaction measured workpiece diameter and ring standard gauge 11 on measurement instrument 1 by the summit of slide block 4 with feeler lever 3.
Each fixed locating stud 12 middle part is provided with a support ring 13 in addition, and the one side of support ring can cooperate with the end face of ring standard gauge 11 (or workpiece for measurement) with base plate 10 contact matching, another side.Fixed locating stud 12 lower ends are respectively equipped with the face of cylinder contact matching of a benchmark locating ring 14 and ring standard gauge 11 (or workpiece for measurement).
Six, above the base plate 10, right side near slide block 4 is provided with a cam holder 6, a hinged lever 8 and continuous handle 9 in the cam holder 6, and an end of lever is provided with cam 5, cam 5 forms contact matching with slide block 4 one ends, also is provided with back-moving spring 7 between lever 8 and base plate 10 are top.When pressing down handle 9, upwards swing of cam 5 can promote slide block 4 and be moved to the left, and makes endpoint location pin 16 break away from workpiece 11 faces of cylinder, so that take off whole surveying instrument.
The course of work of the present invention is as follows:
1, prepares the ring standard gauge 11 of a super-large diameter in advance, two fixed locating studs 12 and endpoint location pin 16 are stuck in the outer radius of ring standard gauge, adjust the position of instrument in instrument holder 2 by screw, slide block 4 is contacted with the probe 3 of measurement instrument, two fixed locating studs 12 and endpoint location pin 16 constitute three reference points of ring standard gauges 11 diameters, have directly write down the diameter data of ring standard gauge 11.Regulate measurement instrument, its numerical value is shown make zero.
2, when the measuring workpieces diameter, two fixed locating studs and endpoint location pin are stuck on the workpiece for measurement, workpiece size contacts with the summit of feeler lever 3 by slide block 4, show the difference of measured workpiece diameter and ring standard gauge 11 on measurement instrument 1, being reflected at has certain fluctuation range in the measurement instrument, promptly be benchmark with the ring standard gauge, see the measurement instrument fluctuation range, fluctuation range is substandard product, otherwise is specification product if exceed setting value.
Embodiment two: be as shown in Figure 3, Figure 4, the ultra-large diameter accurate detector of a kind of measuring workpieces internal diameter provided by the invention, its chief component is identical with embodiment one, but following difference is arranged:
One, measurement instrument 1 and instrument holder 2 are arranged on the interior survey (right side) of slide block 4, and slide block 4 is arranged on the outside (left side) of base plate 10, probe 3 on the measurement instrument 1 forms contact matching from right side and slide block 4 right flanks, also is to be provided with spring 19 between this slide block 4 and the holder 2 certainly.
Two, the cam holder 6, with and go up the outside (left side) that hinged lever 8, handle 9, cam 5 degree are arranged on slide block 4.
By Fig. 3, Fig. 4 as can be seen, two fixed locating studs 12 on right side and the endpoint location pin 16 in left side are stuck on the internal diameter hole wall of ring standard gauge 11 (or workpiece for measurement), the size of internal diameter contacts with probe 3 by slide block 4, and end reaction is in measurement instrument 1, and measuring principle is identical with embodiment one.