CN2300086Y

CN2300086Y - Special measuring tool for odd tooth addendum circle and dedendum circle

Info

Publication number: CN2300086Y
Application number: CN 97214181
Authority: CN
Inventors: 吴亚忠; 罗凤利; 李光煜; 张艳; 何凤梅; 王雷
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-04-20
Filing date: 1997-04-20
Publication date: 1998-12-09
Anticipated expiration: 2007-04-20

Abstract

The utility model relates to a measuring tool which is a special measuring tool for an odd tooth addendum circle and a dedendum circle, composed of a measuring rule, a measuring jaw, a measuring meter and screw nails. The measuring rule uses a middle point as a symmetrical line (i.e. '0' scale line) to carry out reading to both sides and forms a board rule shape, both sides of the measuring rule are fully symmetrical along the symmetrical line, the measuring meter is arranged in a through hole of a middle line of the measuring rule and is fixed by the screw nails, and the measuring jaw is divided into a left and a right two movable jaws and is similar to a movable jaw of a vernier caliper. The utility model has the advantages of simple structure, convenient use, high precision and large measuring range and is an ideal tool for measuring the diameters of the addendum circle and the dedendum circle.

Description

Odd number tooth point circle and root diameter are measured specific purpose tool

The utility model relates to a kind of survey instrument, exactly is that a kind of odd number tooth point circle and root diameter are measured specific purpose tool.

At present, when carrying out the gear mapping, normally measure tip diameter and root diameter, so that determine each major parameter of gear.And when measuring point circle and root diameter, must measure some relevant amounts earlier, and convert again, owing to repeatedly measuring indirectly and converting, its error is bigger.Use up, electric apparatus measures, cost is higher again.In the odd number gear is measured, still there is not method preferably at present.The patent No. is 91228796.9 " non-complete circle footpath and full diameter series measurer ", by a union body respectively with the bolt different length measuring claw that is locked, and be assembled into one with measuring head extension bar coupling, adjust its gap by gap adjusting mechanism, realize little chi survey major diameter and non-complete circle footpath, but can only survey tip diameter, and change different length measuring claw and often adjustment of gap adjusting mechanism again, its angular error is bigger, makes easily to measure to produce than mistake.

It is one simple in structure, easy to use that the present utility model purpose is to provide, and error reaches the odd number tooth point circle and the root diameter of state-set standard and measures specific purpose tool

The technical scheme of utility model is achieved in that odd number tooth point circle and root diameter measurement specific purpose tool structure comprise: gage, measuring claw, meter, screw.Gage is to be the board foot shape to the both sides reading, the symmetry assembling left and right sides, top measuring claw, and measuring claw can slide on gage, is carved with scale along the complete symmetry of gage center line, in the gage midline through hole is arranged, and threaded hole is vertical with through hole and communicate; Insert in the through hole of gage the meter lower end, screws in the threaded hole with screw meter is fixed.

Measuring the tip diameter formula is da=AD ²/ CD+CD, wherein AD by half of chord length of survey point circle, i.e. two measuring claws, one side reading value, CD by the bow height of survey point circle, i.e. data of reading from meter.

The formula of measuring root diameter is

Wherein DE by tooth root to the distance of survey point circle string, difference of reading provides in the time of can be from meter reading and mileometer adjustment.

The utility model is simple in structure, and is easy to use, and meter adopts dial gauge, and measuring accuracy reaches 0.01mm; Adopt clock gauge, measuring accuracy can reach 0.001mm, all in the state-set standard scope, and can measure even number gear point circle and root diameter, also can measure non-complete circle and major diameter circle external diameter, and measurement range is big.

Fig. 1 is that odd number tooth point circle and root diameter are measured the specific purpose tool structural representation;

1 is that gage, 2 is that measuring claw, 3 is that screw, 4 is meter among the figure

Fig. 2 is the gage structural representation;

5 is that threaded hole, 6 is through hole among the figure

Fig. 3 is that odd number tooth point circle and root diameter are measured specific purpose tool measurement tip diameter schematic diagram;

Fig. 4 is that odd number tooth point circle and root diameter are measured specific purpose tool measurement root diameter schematic diagram.

Bottom is described with reference to the accompanying drawings embodiment of the present utility model.

As shown in Figure 1 and Figure 2, gage 1 is the board foot shape, and along alignment both sides reading wherein, midline has through hole 6, threaded hole 5 and through hole 6 vertical and communicate; Insert in the through hole 6 of gage 1 the meter bottom, screws in screw 3 to make meter 4 fixing in the threaded hole 5.The symmetry assembling left and right sides, gage 1 top measuring claw 2, measuring claw 2 can slide on gage 1.

As shown in Figure 3, AD by half of chord length of survey point circle, i.e. half of 2 length of two measuring claws; CD by the bow height of survey point circle, i.e. data of reading from meter 4; Derivation formula is da=AD ²/ CD+CD.

As shown in Figure 4, AD by half of chord length of survey point circle, i.e. half of 2 length of two measuring claws; CD is the bow height of this string, DE by survey gear string AB to the distance of tooth root, can be from the difference of reading acquisition during with adjustment form of the reading of table, derivation formula is d _f

Meter 4 adopts dial gauge, and measuring accuracy reaches 0.01mm; Meter adopts clock gauge, and measuring accuracy can reach 0.001mm.

Before the measurement, need to adjust survey instrument, when surveying point circle, its number of teeth that collapses is an odd number, adjusts measuring claw 2 with symmetry and realizes, measuring claw 2 is stood up on the platform, unclamps screw 3, presses down table 4, makes big indicator rotate a little, tightens screw 3, rotates the dial plate zeroing; When measuring dedendum circle, method is the same, just need make little indicator rotate (when measuring dedendum circle, the table bar of meter 4 is to overhanging) more, and the number of teeth that collapses this moment is an even number, tightens screw 3, rotates the dial plate zeroing and gets final product.

Measuring claw 2 can grind, and vertically divides the line of measuring claw 2 equally to guarantee the meter bar.

Claims

1, a kind of odd number tooth point circle and root diameter are measured specific purpose tool, and structure comprises: gage (1), measuring claw (2), screw (3), meter (4); It is characterized in that: gage (1) is to the both sides reading, be the board foot shape, top symmetry assembling left and right sides measuring claw (2), measuring claw (2) can be gone up at gage (1) and slide, be carved with scale along the complete symmetry of gage (1) center line, gage (1) midline has through hole (5), and threaded hole (6) is vertical with through hole (5) and communicate; Insert in the through hole (5) of gage (1) meter (4) bottom, screws in screw (3) to make meter (4) fixing in the threaded hole (6).