CN2646658Y

CN2646658Y - Diameter survey meter for annular slot inside hole

Info

Publication number: CN2646658Y
Application number: CN 03269473
Authority: CN
Inventors: 刘士生; 刘建华; 王敏
Original assignee: 刘建华
Priority date: 2003-08-14
Filing date: 2003-08-14
Publication date: 2004-10-06
Anticipated expiration: 2013-08-14

Abstract

The utility model discloses a hole inner ring shaped groove diameter measuring instrument, comprising a body, changeable measuring heads, a fixed measuring foot, a movable measuring foot, a measuring lever and a dial indicator. The changeable measuring heads are respectively arranged on the outsides of the fixing measuring foot and the movable measuring foot; the movable measuring foot and the measuring lever are hinged with the body by a movable hinge; the tip of the long arm and the tip of the short arm of the measuring level are respectively provided with flat a contact terminal; the transmission pole of the dial indicator gets through a cover on the measuring lever and corresponds to the flat contact terminal on the long arm of the measuring leer; a stretching spring is arranged between the shot arm of the measuring lever and the short arm of the movable measuring foot; the tip of the short arm of the movable measuring foot is provided with a round contact terminal to correspond to the flat contact terminal on the tip of the short arm of the measuring lever; a concave pit inner embedded compressed spring is arranged between the movable measuring foot and the long arm of the fixing measuring foot. The utility model has the advantages of simple structure, easy manufacturing and high measuring precision; the error is smaller than 0.015mm; the measuring scope is big; the utility model can satisfy the measuring of the hole inner ring shaped grooves of different sizes and the numerical value can be directly read out.

Description

Hole inner groove measuring apparatus of diameter

Technical field: the utility model belongs to the surveying instrument technical field, relates to a kind of hole inner groove measuring apparatus of diameter.

Background technology: present hole inner groove mechanical component of producing, because its processing dimension tolerance is tighter, and groove depth is bigger apart from part end face, can't accurately measure the diameter of its hole inner groove with the internal diameter scale, the precision that adds of part is difficult to guarantee.

Summary of the invention: the technical problems to be solved in the utility model is, the accurate measuring technique problem of hole inner groove diameter, thus a kind of hole inner groove measuring apparatus of diameter is provided.

For solving the problems of the technologies described above, the utility model comprise body, interchangeable gauge head, fixedly foot-measuring, movable foot-measuring, measure lever and dial gauge; Interchangeable gauge head is separately positioned on the fixedly outside of foot-measuring and movable foot-measuring; Movable foot-measuring and measure lever and connects with this body and function hinges is measured long-armed end and the galianconism end of lever and is respectively equipped with flat contact, and it is corresponding that the drive link of dial gauge passes the flat contact of the cover on body top and the long-armed end of measurement lever; Be provided with extension spring between the galianconism of measurement lever and the galianconism of movable foot-measuring, it is corresponding with the flat contact of the galianconism end of measuring lever that the galianconism end of movable foot-measuring is provided with round contact; Movable foot-measuring and fixedly be provided with the embedded compression spring of pit between foot-measuring long-armed.

The measurement range of dial gauge is 0-15mm.

Principle of work of the present utility model: measure lever and movable foot-measuring and under the elastic force effect of extension spring, keep excellent contact,, reduce hysterisis error to eliminate the gap with the circle contact; The ergometry of interchangeable gauge head is produced by compression spring, and its ergometry should be not more than 2N, to reduce the influence of juxtaposition metamorphose to measuring accuracy.The utility model measuring instrument is the second lever gear train, first order lever enlargement factor K ₁For:

K_{1} = \frac{a}{b} = \frac{30}{120} = \frac{1}{4}

In the formula: the length of the movable foot-measuring galianconism of a-, get 30mm;

The long-armed length of the movable foot-measuring of b-is got 120mm.

Second level lever enlargement factor K ₂For:

K_{2} = \frac{c}{d} = \frac{40}{10} = 4

In the formula: c-measures the long-armed length of lever, gets 40mm;

D-measures the length of lever short arm, gets 10mm.

It is long-pending that this measuring instrument total magnification K equals the two-stage enlargement factor, promptly

K = K_{1} \cdot K_{2} = \frac{1}{4} \times 4 = 1

So the micrometric displacement amount of interchangeable gauge head, will pass to dial gauge in 1: 1 ratio by the two-stage lever.

Should select corresponding interchangeable gauge head for use according to the size of tested annular groove during use, adjust the zero-bit of dial gauge again with milscale or ring gauge.Dial gauge should have the decrement of 0.3-0.5mm, makes it certain initial ergometry, has excellent contact to guarantee interchangeable gauge head and tested ring groove surface.During measurement, pinch fixedly foot-measuring and movable foot-measuring gently, put it in the tested part annular groove, slowly unclamp again.Swing the measuring instrument body then gently, read dial gauge numerical value.

The utility model is simple in structure, is easy to make, and measuring accuracy is higher, and error is not more than 0.015mm, and measurement range is bigger, can satisfy the hole inner groove of different size and measure, and can directly read numerical value.

Description of drawings: accompanying drawing is the utility model structural representation.

Among the figure: 1, interchangeable gauge head 2, nut 3, fixedly foot-measuring 4, movable foot-measuring 5, compression spring 6, top 7, extension spring 8, measure lever 9, flat contact 10, screw 11, cover 12, dial gauge 13, cover plate 14, screw 15, support column 16, circle contact 17, body 18, pin

Embodiment: with reference to the accompanying drawings, the utility model comprise body 17, interchangeable gauge head 1, fixedly foot-measuring 3, movable foot-measuring 4, measure lever 8 and dial gauge 12; Interchangeable gauge head 1 is separately positioned on the fixedly outside of foot-measuring 3 and movable foot-measuring 4; Movable foot-measuring 4 and measure lever 8 and connects with body 17 usefulness hinges, the end that measurement lever 8 is long-armed and the end of galianconism are respectively equipped with flat contact, and the cover 11 that the drive link of dial gauge 12 passes body 17 tops is corresponding with flat contact 9; Be provided with extension spring 7 between the galianconism of measurement lever 8 and the galianconism of movable foot-measuring 4, the galianconism end of movable foot-measuring 4 is provided with round contact 16, and is corresponding with the flat contact of the galianconism end of measuring lever 8; Movable foot-measuring 4 and fixedly be provided with the embedded compression spring 5 of pit between foot-measuring 3 long-armed; The measurement range of dial gauge is 0-15mm; The length of movable foot-measuring 4 galianconism is 30mm, and long-armed length is 120mm; The long-armed length that 0-measures lever 8 is 40mm, and the length of galianconism is 10mm.

Claims

1, a kind of hole inner groove measuring apparatus of diameter, it is characterized in that it comprise body (17), interchangeable gauge head (1), fixedly foot-measuring (3), movable foot-measuring (4), measure lever (8) and dial gauge (12); Interchangeable gauge head (1) is separately positioned on the fixedly outside of foot-measuring (3) and movable foot-measuring (4); Movable foot-measuring (4) is connected with hinges with body (17) with measurement lever (8), measure the long-armed end of lever (8) and the end of galianconism and be respectively equipped with flat contact, it is corresponding with flat contact (9) that the drive link of dial gauge (12) passes the cover (11) on body (17) top; Be provided with extension spring (7) between the galianconism of measurement lever (8) and the galianconism end of movable foot-measuring (4), it is corresponding with the flat contact of the galianconism end of measuring lever (8) that the galianconism end of movable foot-measuring (4) is provided with round contact (16); Movable foot-measuring (4) and fixedly be provided with the embedded compression spring of pit (5) between foot-measuring (3) long-armed.

2, hole according to claim 1 inner groove measuring apparatus of diameter, the measurement range that it is characterized in that said dial gauge (12) is 0-15mm.

3, hole according to claim 1 inner groove measuring apparatus of diameter is characterized in that the length of said movable foot-measuring (4) galianconism is 30mm, and long-armed length is 120mm; The long-armed length of measuring lever (8) is 40mm, and galianconism length is 10mm.