CN201440064U

CN201440064U - Measuring device for measuring space between two holes

Info

Publication number: CN201440064U
Application number: CN2009201903664U
Authority: CN
Inventors: 宋栋梁
Original assignee: NINGBO UNITED TOOL Co Ltd
Current assignee: NINGBO UNITED TOOL Co Ltd
Priority date: 2009-07-31
Filing date: 2009-07-31
Publication date: 2010-04-21
Anticipated expiration: 2019-07-31

Abstract

The utility model discloses a measuring device for measuring a space between two holes, which comprises a first expansion sleeve. The outer surface of the first expansion sleeve is expanded into the first through hole of a to-be-measured workpiece, and a first core shaft passes through the inner surface of the first expansion sleeve; a taper is arranged in the position corresponding to the first expansion sleeve on the outer surface of the first core shaft; a second core shaft passes through the second through hole of the to-be-measured workpiece; a no-go-go gauge is arranged on the outer surface of the second core shaft, and the no-go gauge and the go gauge of the no-go-go gauge are positioned on a same vertical plane; the first expansion sleeve is provided with a spherical surface; and the spherical surface is in contact with the inner surface of the first through hole. During the detection, the utility model can quickly detect whether the hole spacing of the to-be-measured workpiece is within the tolerance range only through rotating the no-go-go gauge, thereby ensuring convenient detection and high detection. In addition, the utility model has the advantages of simple structure and low manufacturing cost.

Description

A kind of measurement mechanism that is used to measure two pitchs of holes

Technical field

The utility model relates to a kind of measurement mechanism that is used to measure two pitchs of holes.

Background technology

Orthogonal and disjoint hole is arranged on some mechanical component, the hole of worm gear and the hole of worm screw are installed as part, the required distance precision height between the hole, the best way is to use three-coordinates measuring machine, measurement result is accurate.But the environment for use of three-coordinates measuring machine is strict, and tested part must be taken the special-purpose place of three-coordinates measuring machine and measure measuring process complexity, measurement expense height.And three coordinate measuring machine costs an arm and a leg, under the present present situation of China, in enormous quantities use still unrealistic.

At present, a kind of measurement mechanism that is used to measure two pitchs of holes has appearred on the market, as China invention, Granted publication number " CN101403598 ", in 2009.04.08 disclosed " vertical hole pitch measuring tool ", so a kind of device is just disclosed, it is by base plate, positioning core axle, measure mandrel, dial gauge, adjustment frame and bent plate are formed, positioning core axle and bent plate all are installed on the base plate, two dial gauges are installed on the bent plate, adjustment frame is contained on the bent plate with high milled screw, the measurement mandrel that is contained in the adjustment frame hole is the theoretical correct value of tested part corresponding aperture spacing to the distance of positioning core axle, be contained in measurement mandrel in the adjustment frame hole and compress pointer that two dial gauge edge of a knife gauge heads make them zero, the measurement axial line of two dial gauges by the positioning core axle axial line and with measure the vertical plane symmetry of mandrel axial line, the measurement axis parallel of two dial gauges and with measure the mandrel axial line in a plane, this plane is vertical with the positioning core axle axial line, and the outer side bus that two dial gauge edge of a knife gauge heads contact with the measurement mandrel all measurement axial line with dial gauge is vertical vertical with measurement mandrel axial line; Part is contained on the measurer by positioning core axle, measures mandrel and is contained in the corresponding aperture of part.

The advantage of this pick-up unit is, can detect the numerical value of pitch of holes, but operation or cumbersome, and can not judge pitch of holes rapidly whether within margin tolerance.

The early stage measurement mechanism of producing of the applicant has been done improvement to the problems referred to above, its structure comprises expansion set, the outside surface swelling of expansion set is in first through hole of workpiece for measurement, the inside surface of expansion set is equipped with first mandrel, the outside surface of described first mandrel is provided with the convex shoulder that has tapering corresponding to the expansion set place, second mandrel is located in second through hole of workpiece for measurement, and the end of second mandrel is provided with only drift, and no-go gage on the described only drift and drift are on same perpendicular.Said structure is in use found, first through hole is face with first mandrel and second through hole with second mandrel and contacts, adding the error that produces man-hour makes its right alignment lower easily, this structure only is useful in the less demanding occasion of right alignment, when using the occasion of having relatively high expectations to detect in right alignment, the effect that detects is undesirable, that is to say, this structure detection ratio of precision is lower.

The utility model content

The utility model is at deficiency of the prior art, provide a kind of easy to detect, low cost of manufacture, can judge rapidly pitch of holes whether within margin tolerance and high being used to of accuracy of detection measure the measurement mechanism of two pitchs of holes, this pick-up unit first through hole is that line contacts with first mandrel.

In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:

A kind of measurement mechanism that is used to measure two pitchs of holes, comprise first expansion set, the outside surface swelling of first expansion set is in first through hole of workpiece for measurement, the inside surface of described first expansion set is equipped with first mandrel, the outside surface of described first mandrel is provided with a tapering corresponding to the first expansion set place, second mandrel is located in second through hole of workpiece for measurement, the outside surface of second mandrel is provided with only drift, no-go gage on the described only drift and drift are on same perpendicular, described first expansion set has a spherical surface, and this spherical surface contacts with the inside surface of first through hole.

In the technique scheme, also be provided with reference block on described first expansion set, the reference field of described reference block leans on the end face of workpiece for measurement.

In the technique scheme, the described second mandrel outside surface also is provided with second expansion set, and the second expansion set swelling is in second through hole of workpiece for measurement, and described second mandrel has a tapered end corresponding to the second expansion set place.

In the technique scheme, have expansion set through hole, mandrel through hole on described first expansion set, first mandrel, one bearing pin is located in expansion set through hole, the mandrel through hole, and the internal diameter of expansion set through hole is identical with the bearing pin external diameter, and the internal diameter of mandrel through hole is greater than the bearing pin external diameter.

In the technique scheme, the outside surface of described first mandrel also is provided with convex shoulder, and an end of elastic parts leans on convex shoulder, and the other end of described elastic parts leans on the sidewall of reference block.

Beneficial effect: the utility model compared with prior art has following beneficial effect:

The utility model only needs to rotate and ends pitch of holes that drift can detect workpiece for measurement rapidly whether in margin tolerance when detecting, and is easy to detect and accuracy of detection is high, and the utility model is simple in structure in addition, low cost of manufacture.

Description of drawings

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the left view of Fig. 1

Fig. 3 is an I place enlarged drawing among Fig. 1

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

Referring to Fig. 1～3, a kind of measurement mechanism that is used to measure two pitchs of holes, comprise first expansion set 7, during work, the outside surface swelling of first expansion set 7 is in first through hole 110 of workpiece for measurement, and described first expansion set 7 has a spherical surface 70, and this spherical surface 70 contacts with the inside surface of first through hole 110, in other words, the surface that contacts with first through hole 110 of first expansion set 7 is a spherical surface 70.Spherical surface 70 is arranged on the surface of first expansion set 7; can make first expansion set 7 and contacting of first through hole 110 is the line contact; that is to say; first expansion set 7 and first through hole 110 reach the zero stand-off basically; the inside surface of described first expansion set 7 is equipped with first mandrel 1; the outside surface of described first mandrel 1 processes a tapering 10 corresponding to first expansion set, 7 places; the outside surface of described first expansion set 7 is twisted by bolt and has been closed reference block 5; the reference field 50 of described reference block 5 leans on the end face of workpiece for measurement; as mentioned above; first expansion set 7 and first through hole, 110 zero stand-offs; can guarantee that the reference field 50 of reference block 5 and the end face of workpiece for measurement fit tightly, thereby guarantee the right alignment of first mandrel 1 and first through hole 110.

Have expansion set through hole 72, mandrel through hole 12 on described first expansion set 7, first mandrel 1, one bearing pin 9 is located in expansion set through hole 72, the mandrel through hole 12, and the internal diameter of expansion set through hole 72 is identical with the external diameter of bearing pin 9, it is closely cooperated, the internal diameter of mandrel through hole 12 is greater than the external diameter of bearing pin 9, and bearing pin 9 can horizontal slip in mandrel through hole 12.Be provided with bearing pin 9 and can prevent that first expansion set 7, first mandrel 1, reference block 5 are scattered mutually, break away from.

The outside surface of described first mandrel 1 is provided with convex shoulder 14, one elastic parts 3 is set in the outside surface of first mandrel 1, and an end of elastic parts 3 leans on convex shoulder 14, its other end leans on the sidewall of reference block 5, being provided with elastic parts 3 can exert all one's strength and reach balance, in other words, when first mandrel 1 inserts, when making 7 swellings of first expansion set in first through hole 110 of workpiece for measurement, first expansion set 7 and first through hole 110 closely cooperate, and when needs broke away from first through hole 110 with first expansion set 7, it was very big to operate needed power, operation is difficulty relatively, being provided with elastic parts 3 can push up first mandrel 1 outward, when first expansion set 7 is broken away from first through hole 110, uses less power, can make 1 resilience of first mandrel, operate lighter.Preferably, described elastic parts 3 is a spring, can simplify production technology, and manufacturing cost is lower.

The described measurement mechanism that is used to measure two pitchs of holes also comprises second mandrel 15, second mandrel 15 is located in second through hole 112 of workpiece for measurement, described second mandrel, 15 outside surfaces also are provided with second expansion set 17, during work, 17 swellings of second expansion set are in second through hole 112, described second mandrel 15 has a tapered end 150 corresponding to second expansion set, 17 places, the outside surface of second mandrel 15 is provided with only drift 13, no-go gage 130 on the described only drift 13 and drift 132 are on same perpendicular, and be "+" font and arrange, add man-hour, drift 132 is pressed following processing with the size of the no-go gage 130 and first mandrel 1, when drift 132 contacts with first mandrel, 1 outside surface, the outside surface of drift 132 adds that to the distance at second through hole, 112 centers the radius of first mandrel 1 is the minimum limit of size between the workpiece for measurement two through hole, when no-go gage 130 first mandrels 1 outside surface contacted, the outside surface of no-go gage 130 added that to the distance at second through hole, 112 centers the radius of first mandrel 1 is a maximum limit of size between the workpiece for measurement two through hole.

During measurement; earlier first mandrel 1 is stretched in first through hole 110 of workpiece to be detected; and make spherical surface 70 on first expansion set 7 be arranged in first through hole 110 of workpiece to be detected; first mandrel 1 continues to move afterwards; make first through hole 110 of first expansion set, 7 swelling workpieces for measurement 11; and the reference field 50 that makes reference block 5 is close on the end face of workpiece for measurement 11; because first expansion set 7 has spherical surface 70; first expansion set 7 and first through hole, 110 zero stand-offs; can guarantee that the reference field 50 of reference block 5 and the end face of workpiece for measurement fit tightly; so just make first mandrel 1 have identical central axis with first through hole 110; thereby guarantee the right alignment of first mandrel 1 and first through hole 110; afterwards second expansion set 17 is located in second through hole 112 of workpiece for measurement 11; and promote second mandrel 15; make 17 swellings of second expansion set in second through hole 112; to end drift 13 afterwards is set on second mandrel 15; rotation ends drift 13; if drift 132 passes through; no-go gage 130 can't pass then qualified; otherwise; if drift 132 can't pass or no-go gage 130 is defective by being; thereby whether the pitch of holes of judging workpiece for measurement rapidly is in margin tolerance; operation is very easy, and ratio of precision is higher.

Claims

1. measurement mechanism that is used to measure two pitchs of holes, comprise first expansion set (7), the outside surface swelling of first expansion set (7) is in first through hole (110) of workpiece for measurement (11), the inside surface of described first expansion set (7) is equipped with first mandrel (1), the outside surface of described first mandrel (1) locates to be provided with a tapering (10) corresponding to first expansion set (7), second mandrel (15) is located in second through hole (112) of workpiece for measurement, the outside surface of second mandrel (15) is provided with only drift (13), no-go gage (130) on the described only drift (13) and drift (132) are on same perpendicular, it is characterized in that, described first expansion set (7) has a spherical surface (70), and this spherical surface (70) contacts with the inside surface of first through hole (110).

2. the measurement mechanism that is used to measure two pitchs of holes as claimed in claim 1 is characterized in that, also is provided with reference block (5) on described first expansion set (7), and the reference field (50) of described reference block (5) leans on the end face of workpiece for measurement (11).

3. the measurement mechanism that is used to measure two pitchs of holes as claimed in claim 1, it is characterized in that, described second mandrel (15) outside surface also is provided with second expansion set (17), second expansion set (17) swelling is in second through hole (112) of workpiece for measurement (11), and described second mandrel (15) has been located a tapered end (150) corresponding to second expansion set (17).

4. the measurement mechanism that is used to measure two pitchs of holes as claimed in claim 1, it is characterized in that, have expansion set through hole (72), mandrel through hole (12) on described first expansion set (7), first mandrel (1), one bearing pin (9) is located in expansion set through hole (72), the mandrel through hole (12), and the internal diameter of expansion set through hole (72) is identical with bearing pin (9) external diameter, and the internal diameter of mandrel through hole (12) is greater than bearing pin (9) external diameter.

5. the measurement mechanism that is used to measure two pitchs of holes as claimed in claim 1, it is characterized in that, the outside surface of described first mandrel (1) also is provided with convex shoulder (14), one end of elastic parts (3) leans on convex shoulder (14), and the other end of described elastic parts (3) leans on the sidewall of reference block (5).