CN211552699U - A tool for measuring the verticality of long bolt mounting screw holes - Google Patents

Abstract

The utility model discloses a long bolt installation screw hole verticality measuring tool, which is arranged on a part to be measured, the part to be measured is provided with a screw hole to be measured, the screw hole to be measured is connected to the lower end of a mandrel The provided threaded section is threaded, and the mandrel is sleeved with a scale tool, a spring and a watch seat from the bottom up, wherein the scale tool is arranged on the part to be measured, the watch seat and the mandrel are clearance fit and are provided with A dial indicator, the head of the dial indicator is in contact with the scale set on the scale tool. The utility model has the advantages of simple structure and low requirements on manufacturing precision, can accurately measure the verticality data of the screw holes on the specified length, and can especially meet the requirements of portable measurement of long bolt installation screw holes in engineering sites.

Description

A tool for measuring the verticality of long bolt mounting screw holes

technical field

The utility model belongs to the field of measuring tools, in particular to a measuring tool for the verticality of long bolt mounting screw holes.

Background technique

The maximum length of the wind turbine stud bolt is more than 1m, and the length-diameter ratio is 30:1. The verticality of the installation screw hole is enlarged by the increase of the length of the bolt, which affects the passability of the bolt and the connected parts during assembly and the force of the bolt. state (such as eccentric load, smaller nut contact surface, attenuation of preload, etc.), which in turn affects the safety and quality of wind turbine operation.

The prior art means cannot accurately measure the verticality data of the specified length of the screw hole axis, and cannot meet the requirements for portable measurement of long bolt installation screw holes at the engineering site.

Utility model content

The purpose of the utility model is to solve the above problems, and provide a long bolt installation screw hole verticality measuring tool, which can be simple in structure and convenient in measurement.

In order to achieve the above purpose, the technical solution adopted by the present invention is: a long bolt installation screw hole verticality measuring tool, which is arranged on the part to be measured, the part to be measured is provided with a screw hole to be measured, the The screw hole to be measured is threadedly matched with the threaded section provided at the lower end of the mandrel. The mandrel is fitted with a scale tool, a spring and a watch seat from the bottom to the top, wherein the scale tool is arranged on the part to be measured, and the watch seat and the The mandrel is clearance fit and a dial indicator is arranged thereon, and the head of the indicator is in contact with the scale set on the scale tool.

Further, the scale tool is arranged in a disk shape, the disk surface is horizontally arranged, and a scale line is arranged in the diameter direction of the disk surface; a plurality of struts are arranged at the bottom of the scale tool, and a plurality of the struts are placed on the parts to be measured. Surface contact, the head of the dial indicator is vertically arranged in contact with the scale line set on the scale tool.

Further, a rod-shaped watch frame is arranged on the outer wall of the watch seat, and the dial indicator is vertically arranged at the end of the watch frame.

Further, the scale tool is arranged in a cylindrical shape, and the top sealing surface of the scale tool is provided with a mounting hole, and the mounting hole is clearance fit with the mandrel; a scale is vertically arranged on the outer wall of the scale tool, and the dial indicator is The head level is in contact with this scale.

Further, the outer wall of the watch seat is provided with an installation rod, the end of the installation rod is provided with a vertical hole, the watch frame is arranged through the vertical hole, and the dial indicator is horizontally arranged at the end of the watch frame.

Further, the end of the mounting rod is provided with a threaded hole, the threaded hole and the vertical hole are vertically arranged and connected to each other, and a set screw is arranged in the threaded hole.

Further, the upper part of the mandrel is provided with a shaft shoulder, the watch seat is sleeved at the shaft shoulder, the upper part of the watch seat is sleeved with a retaining ring on the mandrel, and the cylindrical surface of the mandrel on the shaft shoulder A thread is arranged on the thread, a nut is arranged on the thread, and the bottom of the nut is in contact with the retaining ring.

Further, the upper and lower ends of the spring are provided with washers, the upper end of the first washer is in contact with the bottom of the watch base, and the lower end of the second washer is in contact with the top of the scale device.

Further, the top of the mandrel is provided with a handle, and the handle is rod-shaped and vertically penetrates the top of the mandrel.

The beneficial effects of the utility model are as follows: the utility model has the advantages of simple structure, low requirements on manufacturing precision, accurate measurement of the verticality data of the screw holes on the specified length, and can especially meet the requirements of portable measurement of long bolt installation screw holes in engineering sites. When measuring, adjust the position of the dial indicator on the table frame so that the head of the dial points to a certain scale on the scale tool, turn the dial to make the dial indicator rotate around the mandrel for more than one week, and read the dial indicator on the end face of the dial tool. The maximum runout value obtained is the verticality error of the screw hole of the tested part on the corresponding length of the scale value. Since the squareness error increases with the length, the squareness error of a certain length can be directly calculated according to the proportional relationship.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a top view of FIG. 1 .

FIG. 3 is a schematic structural diagram of Embodiment 2 of the present invention.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any protection scope of the present invention. restrictive effect.

Example 1

Referring to Fig. 1-Fig. 2, the specific structure of a long-bolt installation screw hole verticality measuring tool is: it is arranged on the part to be measured 1, and the part to be measured 1 is provided with a screw hole 16 to be measured , the tool includes a mandrel 14, a scale tool 2, a spring 4, and a watch seat 5. Wherein, the scale tool 2 is sleeved on the lower part of the mandrel 14, and a plurality of supports 13 are arranged under the scale tool 2. The scale tool 2 is arranged on the upper surface of the part to be measured 1 through the supports 13, and the scale needs to be guaranteed during actual measurement. The parallelism of the tool 2, the scale tool 2 is arranged in a disk shape, the disk surface is horizontally arranged, and a scale line 15 is arranged in the diameter direction of the disk surface. The spring 4 is arranged on the upper part of the scale tool 2, and the lower end of the spring 4 is provided with a washer 3, the washer 3 is in contact with the upper part of the scale tool 2, the spring is sleeved on the mandrel 14, and the upper end of the spring 4 is connected to another The washer 3 is in contact, and a watch seat 5 is sleeved on the mandrel 14 on the upper part of the washer 3, and the watch seat 5 is arranged on the shoulder of the mandrel 14 to play an axial limit; The upper end of the 5 is provided with a retaining ring 7, which is used to limit the upward movement of the watch seat 5, and a nut 8 is provided on the retaining ring 7, and the nut 8 cooperates with the threaded section provided at the mandrel 14 there. The watch seat 5 can be rotated 360° around the mandrel 14. There is a horizontally arranged watch frame 11 on the outer wall of the watch seat 5. The watch frame 11 is provided with a dial indicator 10. The head 12 is in contact with the graduation line 15 on the graduation tool 2 .

Preferably, a handle 9 is provided on the top of the mandrel 14, and the handle 9 is rod-shaped and vertically penetrates the top of the mandrel 14. By rotating the handle 9, the lower end of the mandrel 14 is screwed into the screw hole of the part to be tested 1 for fixing .

Preferably, the outer wall of the watch base 5 is further provided with a toggle lever 6 , and the watch seat 5 is rotated by toggling the toggle lever 6 .

Preferably, the inner wall of the hole at the clearance fit between the mandrel 14 and the scale tool 2 is set as a trapezoidal, triangular or arc-shaped boss to reduce the fitting width between the two.

The working principle of this embodiment is as follows: by adjusting the position of the dial indicator 10 on the watch frame 11, the dial head 12 is directed to a certain scale on the upper surface of the dial 2, and the dial indicator 10 is rotated around the mandrel 14 by turning the lever 6 For more than one week, read the maximum runout value measured by the dial indicator 10 on the end face of the dial 2, which is the verticality error of the threaded hole of the part to be tested 1 on the corresponding length of the scale value.

When this embodiment is used specifically, first install the support 13 into the lower surface of the dial 2, and check the parallelism between the upper surface of the dial 2 and the lower end surface of the support 13 to ensure that the support 13 has been installed in place; 3. The spring 4 and the washer 3 are sleeved on the mandrel 14; then the watch seat 5 is installed on the shoulder of the mandrel 14 to ensure flexible rotation. Then put the handle 9 vertically through the horizontal mounting through hole of the upper end of the mandrel 14, and rotate the handle 9 to screw the end of the mandrel 14 with the lower threaded section into the thread hole 16 to be tested of the part to be tested 1 for fixing; After the meter head 12 is installed on the dial indicator 10 and tightened, the dial indicator 10 is fixed on the watch frame 11 .

When measuring, adjust the position of the dial indicator 10 on the table frame 11 so that the head 12 points to a certain scale (such as 50) on the scale line 15, and then set the dial indicator 10 to zero after proper contact; Rotate the sub-meter 10 more than one turn around the mandrel 14, and read the maximum runout value (such as 0.05) measured by the dial indicator 10 on the end face of the dial 2, which is the value of the screw hole 16 of the part to be tested 1 on the scale line 15 Corresponds to the verticality error on the length. Since the squareness error increases with the increase of length, the squareness error of a certain length (such as 1m) can be directly calculated according to the proportional relationship, namely: 0.05×(1000/50)=1mm.

Example 2.

As shown in FIG. 3 , the difference between the second embodiment and the first embodiment is that the scale tool 2 is arranged in a cylindrical shape, the top sealing surface of the scale tool 2 is provided with a mounting hole, and the mounting hole has a gap with the mandrel 14 Matching; a scale line 15 is vertically arranged on the outer wall of the scale tool 2 , and the head 12 of the dial indicator 10 is in horizontal contact with the scale line 15 .

Preferably, a plurality of slot holes are formed on the cylindrical surface of the lower end of the calibration tool 2 to reduce the contact surface between the cylindrical bottom of the calibration tool 2 and the surface of the part to be measured 1 .

An installation rod 17 is provided on the outer wall of the watch base 5 , the end of the installation rod 17 is provided with a vertical hole, the watch frame 11 is arranged through the vertical hole, and the dial indicator 10 is horizontally arranged at the end of the watch frame 11 . The end of the installation rod 17 is provided with a threaded hole, the threaded hole and the vertical hole are vertically arranged and connected to each other. A set screw 18 is arranged in the threaded hole, and the installation rod 17 is locked by the set screw 18 .

When measuring, adjust the position of the dial indicator 10 on the table frame 11 so that the head 12 points to a certain scale on the cylinder of the scale cylinder 16, and turn the dial 6 to make the dial indicator 10 rotate around the mandrel 14 for more than one turn, and read out 100 The maximum runout value measured by the sub-meter 10 on the cylindrical surface of the scale cylinder 16 is the verticality error of the screw hole 16 to be measured on the measured part 1 on the corresponding length of the scale value.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus.

The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above examples are only used to help understand the method and the core idea of the present invention. The above are only the preferred embodiments of the present utility model. It should be pointed out that, due to the limited expression of words, there are objectively unlimited specific structures. For those of ordinary skill in the art, without departing from the principles of the present utility model. Under the premise, several improvements, modifications or changes can also be made, and the above-mentioned technical features can also be combined in an appropriate manner; these improvements, modifications or combinations, or the ideas and technical solutions of the utility model are directly applied without improvement. In other occasions, all should be regarded as the protection scope of the present invention.

Claims (9)

1. The utility model provides a long bolt installation screw straightness measuring tool that hangs down, its sets up on the part that awaits measuring, should be provided with the screw that awaits measuring on the part that awaits measuring, its characterized in that, the screw thread section screw-thread fit that the tip set up under screw and the dabber awaits measuring, the dabber from the bottom upwards registrates instrument, spring and gauge stand, and wherein the scale instrument sets up on the part that awaits measuring, gauge stand and dabber clearance fit and be provided with the percentage table on it, the gauge outfit of percentage table and the scale contact that sets up on the scale instrument.

2. The perpendicularity measuring tool for the long bolt installation screw hole as claimed in claim 1, wherein the scale tool is in a shape of a plate, a plate surface of the scale tool is horizontally arranged, and scale marks are arranged in the diameter direction of the plate surface; the bottom of the scale tool is provided with a plurality of support rods, the support rods are in surface contact with the upper surface of the part to be measured, and the gauge outfit of the dial indicator is vertically arranged to be in contact with the scale lines arranged on the scale tool.

3. The verticality measuring tool for the long bolt installation screw hole as claimed in claim 1, wherein a rod-shaped gauge stand is arranged on the outer wall of the gauge stand, and the dial indicator is vertically arranged at the end of the gauge stand.

4. The perpendicularity measuring tool for the long bolt mounting screw hole as claimed in claim 1, wherein the scale tool is arranged in a cylindrical shape, a mounting hole is formed in a top sealing surface of the scale tool, and the mounting hole is in clearance fit with the mandrel; the outer wall of the scale tool is vertically provided with scales, and the dial indicator head horizontally contacts with the scales.

5. The perpendicularity measuring tool for the long bolt installation screw hole is characterized in that an installation rod is arranged on the outer wall of the gauge stand, a vertical hole is formed in the end portion of the installation rod, a gauge stand penetrates through the vertical hole, and the dial indicator is horizontally arranged at the end portion of the gauge stand.

6. The long bolt installation screw hole verticality measuring tool according to claim 5, wherein the end of the installation rod is provided with a threaded hole, the threaded hole is perpendicular to and communicated with the vertical hole, and a set screw is arranged in the threaded hole.

7. The perpendicularity measuring tool for the long bolt installation screw hole is characterized in that a shaft shoulder is arranged on the upper portion of the mandrel, the gauge stand sleeve is arranged at the shaft shoulder, a retaining ring is sleeved on the mandrel on the upper portion of the gauge stand, threads are arranged on the cylindrical surface of the mandrel on the shaft shoulder, a nut is arranged on the threads, and the bottom of the nut is in contact with the retaining ring.

8. The verticality measuring tool for the long bolt installation screw hole as claimed in claim 1, wherein the springs are provided with washers at the upper and lower ends, the upper end of the first washer contacts with the bottom of the gauge stand, and the lower end of the second washer contacts with the top of the scale device.

9. The perpendicularity measuring tool for a long bolt installation screw hole as in claim 1, wherein a handle is arranged at the top of the mandrel, and the handle is rod-shaped and vertically penetrates through the top of the mandrel.

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