CN210664301U

CN210664301U - Portable long stud coaxiality measuring tool

Info

Publication number: CN210664301U
Application number: CN201922235143.1U
Authority: CN
Inventors: 李勇; 吴威
Original assignee: Xiangtan Liyuan Electric Tooling Co Ltd; XEMC Windpower Co Ltd
Current assignee: Hunan Xinglan Wind Power Co ltd; Xiangtan Electric Manufacturing Co Ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-06-02
Anticipated expiration: 2029-12-11

Abstract

The utility model discloses a portable tool for measuring coaxiality of long stud bolts, which comprises a stud bolt to be measured, wherein the stud bolt to be measured is coaxially arranged in a sleeve, one end of the sleeve is coaxially provided with a mounting hole, and a hand wheel is arranged in the mounting hole; the hand wheel comprises a rotary table, a first conical thread sleeve is coaxially arranged on the rotary table, and the first conical thread sleeve is matched with a corresponding thread part on the stud bolt; the other end of the stud bolt is arranged outside the sleeve in a hanging manner, and a second taper thread sleeve is arranged on the thread part at the other end of the stud bolt; and a dial indicator is arranged on the outer circle of the sleeve, and the gauge head of the dial indicator is in contact with the outer circle of the second taper threaded sleeve. During measurement, the turntable is rotated to enable the stud to be measured to rotate for more than one circle, and the maximum jumping value measured by the dial indicator on the excircle of the meter-side taper thread sleeve is read out, so that the coaxiality data of the pitch diameter of the stud thread can be accurately measured, the requirement of portable measurement of an engineering field can be met, and the device is simple in structure, practical and convenient.

Description

Portable long stud coaxiality measuring tool

Technical Field

The utility model belongs to the detection instrument field, in particular to portable long stud axiality measuring tool.

Background

The length of the stud bolt of the wind generating set is more than 1m at most, and the length-diameter ratio reaches 30: the coaxiality of threads at two ends of the bolt influences the passing performance of the bolt and a connected piece during assembly, and the stress state of the bolt (such as unbalance loading, small nut contact surface, pretightening force attenuation and the like), so that the running safety and the quality of the wind generating set are influenced.

The prior art means can not accurately measure the coaxiality value of the pitch diameter of the threads of the stud bolt, or can only measure the straightness of the rod part of the stud bolt, and can not meet the requirement of portable measurement of the long stud bolt in an engineering field.

SUMMERY OF THE UTILITY MODEL

The utility model aims at above problem, provide a portable long stud axiality measuring tool, its simple structure measures the convenience.

In order to realize the above purpose, the utility model adopts the technical scheme that: a portable tool for measuring coaxiality of a long stud bolt comprises a stud bolt to be measured, wherein the stud bolt to be measured is coaxially arranged in a sleeve, one end of the sleeve is coaxially provided with a mounting hole, and a hand wheel is arranged in the mounting hole; the hand wheel comprises a rotary disc, a first taper thread sleeve is coaxially arranged on the rotary disc, and the first taper thread sleeve is matched with a corresponding thread part on the stud bolt; the other end of the stud bolt is arranged outside the sleeve in a hanging manner, and a second taper thread sleeve is arranged on the thread part at the other end of the stud bolt; and a dial indicator is arranged on the excircle of the sleeve, and the gauge head of the dial indicator is in contact with the excircle of the second taper threaded sleeve.

Furthermore, an annular groove is formed in the outer cylindrical surface of the first taper thread sleeve, at least two through holes are formed in the sleeve, a stop pin is arranged in each through hole after the hand wheel is installed, and the end portion of each stop pin is arranged in the annular groove.

Further, the dial indicator is arranged on the sleeve through an installation device, the installation device comprises an indicator frame rod which is horizontally arranged, and the dial indicator is arranged perpendicular to the indicator frame rod; the meter stand is arranged on the meter base, the meter base is in a columnar block shape, a meter stand hole and a meter base fixing hole penetrate through the middle of the end face of the meter base from top to bottom, the meter stand is arranged in the meter stand hole, and the meter base fixing hole is sleeved on the sleeve.

Furthermore, the upper part and the lower part of the gauge stand are respectively provided with a first threaded hole communicated with the gauge stand hole and a second threaded hole communicated with the gauge stand fixing hole, and the first threaded hole and the second threaded hole are respectively internally provided with a first set screw and a second set screw.

Furthermore, a handle is arranged on the hand wheel.

Further, the sleeve is arranged on the base.

The utility model has the advantages that: the utility model discloses simple structure, it is lower to make the required precision, during the measurement, rotates the carousel through the handle, makes to be surveyed stud rotate more than a week, reads out the biggest run-out value that the percentage table surveyed on table side awl thread bush excircle, is stud's axiality error promptly to the axiality data of accurate measurement stud screw thread intermediate diameter can satisfy the portable measuring requirement of the long stud in the engineering scene.

Drawings

Fig. 1 is a main sectional view of the structure of the present invention.

Fig. 2 is a partial view of one end of the sleeve of the present invention.

Fig. 3 is a front view of the hand wheel of the present invention.

Fig. 4 is a side view of the watch base of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.

Referring to fig. 1-4, a portable tool for measuring coaxiality of a long stud bolt comprises a stud bolt 8 to be measured, a base 1, a sleeve 7, a hand wheel 14 and a second taper thread sleeve 13; the two supports 2 are symmetrically arranged on two sides of the base 1, and the top of each support 2 is provided with a cambered surface with the same diameter as the outer cylinder of the sleeve 7, so that two ends of the sleeve 7 can be horizontally placed on the two supports 2 conveniently; the hand wheel 14 comprises a first taper thread sleeve 5 and a rotary table 4, the first taper thread sleeve 5 is coaxially arranged on the disc surface on one side of the rotary table 4, the first taper thread sleeve 5 is arranged in a mounting hole 72 which is coaxially arranged on an inner hole at one end of the sleeve 7, the inner diameter of the mounting hole 72 is larger than that of the sleeve 7, and the first taper thread sleeve 5 is in clearance fit with the sleeve 7; the first taper thread sleeve 5 is screwed and fixed with the thread part at one end of the stud bolt 8 to be tested in a thread fit way, the other end of the stud bolt 8 to be tested extends out of the sleeve 7, and a second taper thread sleeve 13 is arranged on the thread part at the other end; a dial indicator 12 is arranged on the sleeve 7, and the outer circular surface of the second conical threaded sleeve 13 is in contact with the head of the dial indicator 12.

Preferably, in order to prevent the first taper thread bush 5 from generating axial movement after being screwed at one end of the stud bolt 8 to be tested, an annular groove 51 is formed in the outer cylindrical surface of the first taper thread bush 5, two threaded holes 71 are arranged on the outer wall of the section of the mounting hole 72 of the sleeve 7 in a penetrating manner, after the hand wheel 14 is mounted, the stop pin 6 is screwed into the threaded holes 71, and the end part of the stop pin 6 is arranged in the annular groove 51; the annular groove 51 is arranged to enable the handwheel 14 to drive the stud bolt 8 to be measured to rotate on the one hand, and to prevent the stud bolt 8 to be measured from axially moving to influence the measurement accuracy on the other hand.

Preferably, the dial indicator 12 is arranged on the sleeve 7 through an installation device, the installation device comprises an indicator support rod 9 horizontally arranged, the dial indicator 12 is arranged perpendicular to the indicator support rod 9, the indicator support rod 9 is arranged on the indicator base 10, the indicator base 10 is in a columnar block shape, an indicator support hole 101 and an indicator base fixing hole 102 are vertically arranged in the middle of the end face of the indicator support rod in a penetrating mode, the indicator support rod 9 is arranged in the indicator support hole 101, and the indicator base fixing hole 102 is sleeved on the sleeve 7.

Further, in order to fix the frame bar 9 and the base 10 and to facilitate position adjustment, a first threaded hole 103 communicating with the frame hole 101 and a second threaded hole 104 communicating with the base fixing hole 102 are respectively formed in the upper and lower portions of the base 10, a first set screw 11 and a second set screw 14 are respectively formed in the first threaded hole 101 and the second threaded hole 104, the frame bar 9 or the base 10 is fixed by tightening the first set screw 11 and the second set screw 14, and the frame bar 9 or the base 10 is detachable or position-adjusted by loosening the first set screw 11 and the second set screw 14.

Preferably, the hand wheel 14 is provided with a handle 3, the handle 3 rotates the rotary table 4, so that the stud bolt 8 to be tested rotates for more than one circle, and the maximum run-out value measured by the dial indicator 12 on the outer circle of the second taper thread sleeve 13 is read, namely the coaxiality error of the stud bolt 8 to be tested.

It should be noted that the first taper thread bush 5 and the second taper thread bush 13 which are replaceable for stud bolts 8 to be measured with different nominal diameters are applied to the utility model; for stud bolts 8 to be tested with different lengths, the lengths of the sleeve 7 and the mounting hole with corresponding specifications can be selected, and the lengths of the first taper thread bush 5 and the second taper thread bush 13 can be changed.

The utility model discloses during the specific use: before measurement, the hand wheel 14 is installed, the first taper thread sleeve 5 arranged on the hand wheel is installed into the installation hole 72 at one end of the sleeve 7, and the two stop pins 6 are screwed into the sleeve 7 from the threaded holes 71 and then arranged in the annular groove 51 arranged on the first taper thread sleeve 5 to prevent axial movement. Then, the bezel fixing hole 102 of the bezel 10 is fitted to the other end of the sleeve 7, and is locked to the sleeve 7 by the corresponding second set screw 14 after the approximate position is adjusted, and the bezel lever 9 is mounted in the bezel hole 101 and is locked by the corresponding first set screw 11 after the approximate position is adjusted. And then flatly placing the assembled sleeve 7 on the base 1, screwing the tested stud 8 into the first taper thread sleeve 5 from the other end of the sleeve 7, eliminating the positioning gap between the tested stud 8 and the taper thread sleeve 5 under the effect of the taper thread after screwing, then screwing the second taper thread sleeve 13 on the cantilever end of the stud 8 to be tested, and eliminating the positioning gap between the stud 8 to be tested and the second taper thread sleeve 13 under the effect of the taper thread after screwing. Finally, the dial indicator 12 is installed on the gauge stand 9, the position is adjusted to enable the gauge head to be approximately located in the middle position of the outer cylinder of the second taper thread sleeve 13, and the dial indicator 12 is subjected to zero alignment after proper contact; during measurement, the handle 3 is used for rotating the turntable 4, so that the stud bolt 8 to be measured rotates for more than one circle, and the maximum jumping value measured by the dial indicator 12 on the outer circle of the surface side taper thread sleeve 13 is read, namely the coaxiality error of the stud bolt 8 to be measured.

Claims

1. a portable long stud coaxiality measuring tool, comprising a stud to be measured, it is characterized in that, the stud to be measured is coaxially arranged in a casing, and one end of the casing is coaxially provided with an installation. A hand wheel is arranged in the installation hole; the hand wheel includes a turntable, and a first tapered threaded sleeve is coaxially provided on the turntable, and the first tapered threaded sleeve is matched with the corresponding threaded portion on the stud bolt; The other end of the stud bolt is suspended outside the casing, and a second tapered threaded sleeve is set on the threaded portion of the end; a dial indicator is installed on the outer circle of the casing, and the head of the dial indicator is connected to the first dial. The outer circle of the two-cone threaded sleeve contacts.

2 . A portable long stud coaxiality measuring tool according to claim 1 , wherein an annular groove is provided on the outer cylindrical surface of the first tapered threaded sleeve, and at least a Two through holes are provided with stop pins in the through holes after the handwheel is installed, and the ends of the stop pins are arranged in the annular groove.

3. A portable long stud coaxiality measuring tool according to claim 1, wherein the dial indicator is arranged on the casing by an installation device, and the installation device comprises a horizontally arranged watch frame The dial indicator is arranged vertically with the watch frame rod; the watch frame rod is arranged on the watch seat, and the watch seat is in the shape of a columnar block, and the middle part of the end face is provided with a watch frame hole and a watch seat fixing hole up and down. The watch frame is arranged in the watch frame hole, and the watch seat fixing hole is sleeved on the sleeve.

4. A portable long stud coaxiality measuring tool according to claim 3, wherein the upper and lower parts of the watch base are respectively provided with a first threaded hole communicating with the watch frame hole and a first threaded hole that is fixed with the watch base A second threaded hole communicated with each other, wherein a first set screw and a second set screw are respectively arranged in the first threaded hole and the second threaded hole.

5 . The portable long stud coaxiality measuring tool according to claim 1 , wherein a handle is provided on the hand wheel. 6 .

6 . The portable long stud coaxiality measuring tool according to claim 1 , wherein the sleeve is arranged on the base. 7 .