CN216745895U

CN216745895U - Coaxiality detection tool

Info

Publication number: CN216745895U
Application number: CN202122961019.0U
Authority: CN
Inventors: 马建华; 李晓峰; 张震
Original assignee: Shaanxi Changkong Gear Co ltd
Current assignee: Shaanxi Changkong Gear Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-06-14
Anticipated expiration: 2031-11-30

Abstract

The utility model discloses a axiality detects instrument, including being equipped with the base that has two the same through-holes at least. Spaces are reserved among the through holes; the axis of the through hole is vertical to the reference surface of the base; the length of the needle roller is greater than the depth of the through hole; the lower end of the roller pin is inserted in the through hole and forms clearance fit with the through hole, and the upper end of the roller pin extends out of the through hole. The axis of the roller pin is vertical to the datum plane; one side of the base is provided with a dial indicator, and the indicator needle is contacted with an inner hole or an outer hole of the part to be measured. The needle roller is in line contact with the inner hole or the outer circle of the part to be measured, so that the damage to the inner hole or the outer circle of the part to be measured is avoided. The whole detection tool is simple in structure and convenient to operate, coaxiality of the detected part can be measured quickly and accurately by one line of workers, detection cost is reduced, and detection efficiency is improved. Because set up the through-hole into two of V-arrangement distribution, the part under test of adaptation equidimension not that can be fine. The detection adaptability is expanded.

Description

Coaxiality detection tool

Technical Field

The utility model belongs to detect the instrument, specifically be a axiality detects instrument.

Background

As shown in fig. 1, when a ring-like part is used as a part 1 to be detected and coaxiality needs to be detected, two detection means are generally adopted. One method is a three-coordinate detection method, the detection equipment is high in cost, needs professional workers to operate, and is low in detection efficiency. The other is to use a dedicated checking spindle 8 for checking. As shown in FIG. 2, when the coaxiality of the part to be measured 1 is measured by the inspection mandrel 8, the matching requirement of the outer circle of the mandrel 8 and the inner hole 2 of the part to be measured 1 is high, otherwise, the matching clearance can influence the measurement result. And different parts 1 to be detected need to select mandrels 8 with different excircle diameters for matching due to different sizes of inner holes 2, so that the adaptability of the mandrel 8 is not strong. In addition, the surface of the inner hole 2 of the part 1 to be detected is easily scratched by the checking mandrel 8 in the clamping process.

Disclosure of Invention

In view of this, the utility model provides a axiality detects instrument can avoid causing the fish tail to the hole of being surveyed the part, convenient operation, and detection efficiency is high.

The utility model adopts the technical proposal that: the utility model provides a axiality detects instrument, includes the base, its characterized in that: the upper surface of the base is a datum plane; at least two identical through holes are arranged on the base, and a space is reserved between the two through holes; the axis of the through hole is vertical to the reference surface; the length of the needle roller is greater than the depth of the through hole; the lower end of the roller pin is inserted into the through hole and forms clearance fit with the through hole, the upper end of the roller pin extends out of the through hole, and the axis of the roller pin is vertical to the reference surface; one side of the base is provided with a dial indicator, and the indicator needle of the dial indicator is in contact with the inner hole or the outer hole of the part to be measured.

Furthermore, the through holes are arranged into two rows, the two rows of through holes are symmetrically distributed in a V shape, and a space is reserved between every two adjacent rows of through holes.

Further, in two through-holes, the interval of every adjacent through-hole of row grows gradually.

Further, the through holes are 9 groups.

The utility model has the advantages that: in the detection process, the rolling needle always keeps line contact with the inner hole or the excircle of the detected part, and the damage to the inner hole or the excircle of the detected part is avoided. The detection tool is simple in structure and convenient to operate, and a line of workers can quickly and accurately measure the coaxiality of the detected part, so that the detection cost is reduced, and the detection efficiency is improved.

In the additional technical characteristics, the through holes are arranged into two rows in V-shaped distribution, so that the device can be well adapted to parts to be detected with different sizes, and the detection adaptability is improved.

Drawings

FIG. 1 is a front view and a cross-sectional view of a part to be measured.

FIG. 2 is a schematic structural diagram of a mandrel for inspecting a part under test.

Fig. 3 is a schematic structural diagram of the present invention.

Fig. 4 is a sectional view a-a of fig. 3.

Fig. 5 is a schematic structural diagram of the detecting device for detecting the detected part according to the present invention.

Fig. 6 is a sectional view B-B of fig. 5.

In the figure: 1. the part to be measured comprises 2 parts, an inner hole, 3 parts, an outer circle, 4 parts, a base, 5 parts, a through hole, 6 parts, a roller pin, 7 parts, a dial indicator, 8 parts and a mandrel.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 3 and 4, a coaxiality detection tool includes a base 4, a through hole 2, a needle roller 6, and a dial indicator 7. The base 4 is a plate-like member. The upper surface of the base 4 is used as a reference surface for placing the part 1 to be measured. At least one group of through holes 5 are arranged on the base 4. Two identical through holes 5 are in one set. The axis of the through-hole 5 is perpendicular to the reference plane. At least two needle rollers 6 are provided. The length of the needle roller 6 is larger than the depth of the through hole 5. The lower end of the roller pin 6 is inserted into the through hole 5 to form clearance fit, and the upper end of the roller pin 6 extends out of the through hole 5 to be externally used for positioning the part 1 to be measured. The axis of the needle roller 6 inserted in the through hole 5 is vertical to the reference surface. The needle roller 6 can rotate in the through hole 5. The dial indicator 7 is arranged on one side of the base 4 through the gauge stand. The pointer of the dial indicator 7 is contacted with the inner hole 2 or the outer hole of the part 1 to be measured.

In order to enlarge the utility model discloses an adaptability sets up through-hole 5 to two. Two rows of through holes 5 are symmetrically distributed in a V shape. And a space is reserved between every two adjacent through holes 5 in each column. The pitch of the adjacent through holes 5 becomes gradually larger. As shown in fig. 5, the through holes 5 may be arranged in 9 groups, i.e., 18. When the device is used, a corresponding group of through holes 5 can be selected according to the size of the appearance of the part 1 to be detected. After the roller pin 6 is inserted into the through hole 5, the inner hole 2 or the outer circle 3 of the tested part 1 is attached to the part of the roller pin 6 extending out of the base 4, so that the tested part 1 and the roller pin 6 form two line contacts.

As shown in FIG. 5 and FIG. 6, when the present invention is used, the through hole 5 at the corresponding position is selected according to the size of the outer circle 3 or the inner hole 2 of the measured part 1. The needle rollers 6 are then inserted into the selected through holes 5. The end face of the part 1 to be measured is placed on the reference surface of the base 4. The end face is attached to the reference face. If the coaxiality of the outer circle 3 is measured by taking the inner hole 2 of the measured part 1 as a reference, the inner hole 2 is attached to the two rolling needles 6 to form two line contacts. The pointer of the dial indicator 7 is contacted with the excircle 3, and the change value of the dial indicator 7 is read in the rotation process of the tested part 1, so that the coaxiality value can be obtained. If the outer circle 3 of the part 1 to be measured is taken as a reference, and the coaxiality of the inner hole 2 is measured, the outer circle 3 is attached to the two roller pins 6 to form two line contacts. The pointer of the dial indicator 7 is contacted with the inner hole 2, and the change value of the dial indicator 7 is read in the rotation process of the measured part 1, so that the coaxiality value can be obtained.

The utility model discloses when examining, need not to consider the size cooperation of mandrel 8 and hole 2, only can accomplish the location with selecting the suitable through-hole 5 of interval. The inner hole 2 and the outer circle 3 of the part 1 to be measured cannot be damaged. The coaxiality measuring device is convenient to operate, and a worker can quickly and accurately measure the coaxiality of the part 1 to be measured. The detection cost is low and the efficiency is high.

Claims

1. The utility model provides a axiality detects instrument, includes the base, its characterized in that: the upper surface of the base is a datum plane; at least two identical through holes are arranged on the base, and a space is reserved between the two through holes; the axis of the through hole is vertical to the reference surface; the needle roller is characterized by also comprising at least two needle rollers, wherein the length of each needle roller is greater than the depth of the through hole; the lower end of the roller pin is inserted into the through hole and forms clearance fit with the through hole, the upper end of the roller pin extends out of the through hole, and the axis of the roller pin is vertical to the reference surface; one side of the base is provided with a dial indicator, and an indicator needle of the dial indicator is in contact with an inner hole or an outer hole of the measured part.

2. A coaxiality inspection tool according to claim 1, wherein: the through holes are arranged in two rows, the two rows of through holes are symmetrically distributed in a V shape, and a space is reserved between every two adjacent rows of through holes.

3. A coaxiality inspection tool according to claim 2, wherein: in two through-holes, the interval between every adjacent through-hole becomes big gradually.

4. A coaxiality inspection tool according to claim 2, wherein: the through holes are 9 groups.