CN2628990Y

CN2628990Y - Screening gauge

Info

Publication number: CN2628990Y
Application number: CN 03254488
Authority: CN
Inventors: 杨良明; 熊雯萱
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2003-06-14
Filing date: 2003-06-14
Publication date: 2004-07-28
Anticipated expiration: 2013-06-14

Abstract

The utility model relates to a scan gauge used to measure the hole position, consists mainly of a measuring head, a measuring bar, a guide rod and a dial indicator, and is characterized in that a measuring head of the dial indicator is positioned in a central hole of the guide rod; the measuring bar is penetrated through the central hole of the guide rod and be axially moved along the central hole; the sides of the measuring bar are respectively connected with the measuring head and the dial indicator; a surface contacted with the measuring head is an inclined plane; the measuring head is eccentric wheel type, equipped on the guide rod through a pin and can freely revolve along the pin; a surface contacted with the measuring bar is an eccentric cambered surface taking the axis of the pin as a movement axis, and always is tangent to the inclined surface of the measuring bar. The scan gauge can read out the offset relative to a datum position quickly and accurately; not only reads the measured hole position conveniently, but also adjusts the lathe at any time according to the measured data to ensure the product quality; can measure the hole position of the little holes of the measured workpieces conveniently; also, is convenient for the operator to read.

Description

Scanning rule

Technical field: the utility model relates to a kind of mechanical hook-up that is used to detect hole location---scanning rule.

Background technology: at present, it is to utilize the method for position, hole cubing conjunction measuring plug to judge that qualitatively the position, hole of workpiece is qualified and defective that traditional hole location detects.It can not detect the size relationship of the mutual alignment of workpiece actual apertures position and position, theoretical hole, and reliable adjustment data can not be provided for the process of workpiece.

Summary of the invention: the utility model can only qualitatively can not detect the position, hole quantitatively in order to overcome present production mesopore position cubing, the deficiency long with the three-dimensional metering cycle, that cost is high, a kind of scanning rule that is used to detect hole location is provided, mainly be made up of gauge head, measuring staff, guide pole, dial gauge, it is characterized in that: described dial gauge gauge head is positioned at described guide pole interstitial hole; Described measuring staff passes described guide pole interstitial hole, and can do axially-movable along the hole, and two ends link with described gauge head and dial gauge respectively, and the face that contacts with described gauge head is the inclined-plane; Described gauge head is an eccentric wheel type, is installed on the guide pole by bearing pin, and can rotates freely along bearing pin; The face that described gauge head contacts with measuring staff is to be the eccentric cambered surface in motion axle center with the bearing pin, remains tangent with the inclined-plane of described measuring staff.

Sensing hole is with respect to the side-play amount of reference position accurately and rapidly for this scanning rule, and the measured hole position is convenient reading not only, and can adjust lathe according to its data of measuring at any time, guarantees the quality of product.Can be convenient for measuring the position degree of measured workpiece aperture, simultaneously handled easily person reading.

Description of drawings: Fig. 1 is the structural representation of the utility model scanning rule;

Fig. 2 is the schematic diagram of the utility model scanning rule.

Embodiment: as shown in Figure 1, the utility model scanning rule mainly is made up of eccentric wheel type gauge head 17, measuring staff 16, guide pole 3, dial gauge 10, and wherein the gauge head of dial gauge 10 is positioned at guide pole 3 interstitial holes; Measuring staff 14 passes guide pole 3 interstitial holes, and can do axially-movable along the hole, and two ends link with eccentric wheel type gauge head 15 and dial gauge 10 respectively, and the end face that contacts with eccentric wheel type gauge head 17 is the inclined-plane; Eccentric wheel type gauge head 17 is installed on the guide pole 3 by bearing pin 1, and can rotate freely along bearing pin 1; The face that eccentric wheel type gauge head 17 contacts with measuring staff 16 is to be the eccentric cambered surface in axle center with bearing pin 1, remains tangent with the inclined-plane of measuring staff 16.For guaranteeing measuring staff 16 moving axially in guide pole 3 holes, copper sheathing 2, back copper sheathing 13 before the two ends in guide pole 3 holes have respectively; For guaranteeing that measuring staff 16 contact with the curved surface of eccentric wheel type gauge head 17 all the time, the built-in holddown spring 14 in guide pole 3 holes, holddown spring 14 are positioned at copper sheathing 13 inboards afterwards, and with clamping sleeve 5 it are compressed.

Because this scanning rule is mainly used in the position degree that detects the hole, therefore for convenient reading, increase gauge stand 6 and solid of revolution 7 thereon, reach and do not change observation visual angle, only rotate solid of revolution 7 and just can realize the purpose of 360 degree survey measurementss, as shown in Figure 1, solid of revolution 7 is connected and fixed with front end end cover 4, rear end cap 12 and guide pole 3 respectively by screw 15, gauge stand 6 is positioned at solid of revolution 7 inboards, is connected with solid of revolution 7 by surface bearing 8.The hole that dial gauge 10 gauge heads pass gauge stand 6 is connected with measuring staff 16, and is simultaneously in order to overcome artificial error, at dial gauge 10 peripheral hardwares one watch glasses 9, fastening by bolt 11 between watch glasses 9 and the gauge stand 6.The effect of surface bearing 8 is that solid of revolution 7 rotates flexibly by guide pole 3 drive measuring staffs 16 and eccentric wheel type gauge head 17 when guaranteeing the scanning rule measurement; The effect of gauge stand 6 is that watch glasses 9 and dial gauge 10 are motionless when guaranteeing solid of revolution 7 motions.Relative motionless mechanism when constituting 7 rotations of a solid of revolution by surface bearing 8, gauge stand 6 and watch glasses 9.Can think that also gauge stand 6 and surface bearing 8 have constituted a surface bearing group, it makes solid of revolution 7 go slick on the one hand, makes dial gauge 10 invariant position when solid of revolution 7 motions on the one hand.

The principle of this scanning rule is to utilize 45 ° of inclined-planes and the tangent principle of quafric curve, by the eccentric mechanism of optimal design, guarantees to be converted into according to a certain percentage in the motion of Y direction the motion of directions X.As shown in Figure 2: eccentric wheel gauge head 17 is the center rotation with the O point, is Δ Y at Y direction variable quantity, and measuring staff 16 is Δ X at the directions X variable quantity, by optimal design A, B, R value, making has certain proportionate relationship in a certain scope between Δ Y and the Δ X, i.e. Δ Y=K * Δ X, and wherein K is a scale-up factor.

In this scanning rule, gauge head 17 is around bearing pin 1 rotation, the Kong Zhongzuo axially-movable that measuring staff 16 is being made up of two copper sheathings, spring 14 guarantees that measuring staff 16 contacts with the curved surface of gauge head 17 all the time, the gauge head of dial gauge 10 keeps contacting with measuring staff 16 all the time under the effect of self spring force, the variable quantity radially of gauge head 17 is converted into the amount of axial movement of measuring staff 16 like this, thereby is reflected on the dial gauge 10.In the embodiment shown in fig. 1, when gauge head (A=4.94 ± 0.02, B=10.06 ± 0.02, R=14.22 ± 0.04, L=15 ± 0.02) rotates around bearing pin, promptly move radially Δ Y, measuring staff is moving axially Δ X, and the amount of movement of dial gauge also is Δ X, Δ X=Δ Y.In measuring process, pivoting part drives measurement component rotation, the axial movement value of pivoting part≤3 μ m.

Claims

1, a kind of scanning rule that is used to detect hole location mainly is made up of gauge head, measuring staff, guide pole, dial gauge, it is characterized in that: described dial gauge gauge head is positioned at described guide pole interstitial hole; Described measuring staff passes described guide pole interstitial hole, and can do axially-movable along the hole, and two ends link with described gauge head and dial gauge respectively, and the face that contacts with described gauge head is the inclined-plane; Described gauge head is an eccentric wheel type, is installed on the guide pole by bearing pin, and can rotates freely along bearing pin; The face that described gauge head contacts with measuring staff is to be the eccentric cambered surface in motion axle center with the bearing pin, remains tangent with the inclined-plane of described measuring staff.

2, scanning rule as claimed in claim 1 is characterized in that: the built-in holddown spring in described guide pole hole is pressed in the described hole by the outer end clamping sleeve.

3, scanning rule as claimed in claim 1 or 2 is characterized in that: the two ends in described guide pole hole have preceding copper sheathing, back copper sheathing respectively.

4, scanning rule as claimed in claim 1, it is characterized in that: described scanning rule also includes gauge stand and solid of revolution, described gauge stand is positioned at described solid of revolution inboard, be connected with described solid of revolution by surface bearing, described solid of revolution is connected and fixed by screw and described front end end cover, rear end cap and guide pole.

5, scanning rule as claimed in claim 1 is characterized in that: described dial gauge peripheral hardware one watch glasses.