Device for detecting inner diameter of circular-truncated-cone-shaped cylinder

Abstract

The invention discloses a device for detecting the inner diameter of a circular-truncated-cone-shaped cylinder. Comprising a centering disc, a graduated drum, a driving rod, a positioning sleeve, a horizontal positioning shaft and a positioning rod, wherein an opening of the graduated drum is connected to the upper plate surface of the centering disc; the driving rod is inserted into the graduated drum; the positioning sleeve is fixed to the lower plate surface of the centering disc; the lower end of the driving rod is hinged with the horizontal positioning shaft through four short connecting rods; two short connecting rod receding long holes are formed in the side wall of the positioning sleeve, marking lines are carved on the driving rod, and when the driving rod moves downwards, middle hinge shafts of the four short connecting rods extend out of the two short connecting rod receding long holes. According to the detection device, whether the inner diameters of the opening part and the middle part of the circular-truncated-cone-shaped cylinder meet the tolerance requirement or not can be rapidly measured, and the precision of follow-up assembly of a workpiece is guaranteed.

Description

Technical Field

[0001] The invention relates to a device for detecting the inner diameter of a truncated cone-shaped cylinder, belonging to the technical field of workpiece quality detection. Background Art

[0002] A certain processed part is a truncated cone-shaped cylindrical structure with a closed small end and an open large end. After the product is processed, the diameter of the inner cavity of the part at a fixed height position needs to be measured. The existing detection method is to use a "steel ruler" and an "internal card" for measurement.

[0003] First, place the deep-hole cone upright on a flat surface, and use an "inner card" to insert into the inner cavity of the deep-hole cone from the opening to stretch it open, so that the two tips of the "inner card" are in contact with the inner cavity of the deep-hole cone. Use a steel ruler to make the lower end face contact with the inner bottom of the cone, measure the length of the two tips of the "inner card" from the inner bottom of the cone, and then convert it into height through angle calculation. Then, clamp the inner card by hand to take out the cone, and use a steel ruler to measure the distance between the two tips of the "inner card" to measure the inner diameter of the cone at a certain height of the inner bottom. Summary of the invention

[0004] The purpose of the present invention is to provide a truncated cone inner diameter detection device to solve the problems of complicated measuring steps and poor measuring accuracy when measuring the inner diameter of a truncated cone cylinder by traditional technology.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] The present invention discloses a truncated cone-shaped cylinder inner diameter detection device, comprising a centering plate, a graduated cylinder with a hole connected to the upper plate surface of the centering plate, a driving rod inserted in the graduated cylinder, a positioning sleeve fixed to the lower plate surface of the centering plate, a horizontal positioning shaft fixed to the lower end of the inner cavity of the positioning sleeve, and a positioning rod threadedly connected to the center of the lower end plate of the positioning sleeve;

[0007] The lower end of the driving rod is hinged to the horizontal positioning shaft through four short connecting rods; the side wall of the positioning sleeve is provided with two short connecting rod giving way long holes, and the driving rod is engraved with a marking line. When the driving rod moves downward, the middle hinge shafts of the four short connecting rods extend out of the two short connecting rod giving way long holes.

[0008] In order to prevent the workpiece from being scratched during the test, a detection wheel is installed on the middle hinged shaft where the four short connecting rods are hinged, and the detection wheel contacts the inner wall of the workpiece.

[0009] Working process

[0010] When inspecting the inner diameter of the truncated cone-shaped cylinder, first install the inspection device into the standard workpiece, and adjust the screw-in depth of the positioning rod so that when the lower end of the positioning rod is tightly against the inner bottom of the standard workpiece, the outer edge of the centering plate just contacts the inner wall of the mouth of the standard workpiece; at the same time, release the driving rod, so that the inspection wheel at the middle hinge of the four short connecting rods extends out of the long holes of the two short connecting rods to make way for the middle inner wall of the standard workpiece, and records the reading of the mark line on the driving rod at the time on the scale cylinder.

[0011] Then install the detection device into the workpiece to be measured, first detect whether the lower end of the positioning rod and the outer edge of the centering plate can contact the inner bottom and inner wall of the workpiece to be measured at the same time, so as to judge whether the diameter of the inner wall of the mouth of the workpiece to be measured meets the requirement, and then release the driving rod to make the detection wheel at the middle hinge of the four short connecting rods extend out of the long holes of the two short connecting rods to close to the middle inner wall of the standard workpiece, observe whether the reading of the marking line on the driving rod at this time on the scale cylinder is within the floating range of the recorded reading, so as to judge whether the diameter of the middle inner wall of the workpiece to be measured meets the requirement.

[0012] Beneficial Effects

[0013] The detection device of the present invention has a simple structure and is easy to use. It can quickly measure whether the inner diameters of the mouth and the middle of the truncated cone-shaped cylinder meet the tolerance requirements, thereby ensuring the accuracy of subsequent assembly of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the detection device of the present invention;

[0015] In the figure, 1-positioning rod, 2-positioning sleeve, 3-horizontal positioning shaft, 4-short connecting rod, 5-detection wheel, 6-articulated shaft, 7-centering plate, 8-driving rod, 9-scale cylinder, 10-workpiece. DETAILED DESCRIPTION

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Example

[0018] like Figure 1 As shown, a truncated cone-shaped cylinder inner diameter detection device of the present invention comprises a centering plate 7, a graduated cylinder 9 with an opening connected to the upper plate surface of the centering plate 7, a driving rod 8 inserted in the graduated cylinder 9, a positioning sleeve 2 fixed to the lower plate surface of the centering plate 7, a horizontal positioning shaft 3 fixed to the lower end of the inner cavity of the positioning sleeve 2, and a positioning rod 1 threadedly connected to the center of the lower end plate of the positioning sleeve 2;

[0019] The lower end of the driving rod 8 is hinged to the horizontal positioning shaft 3 through four short connecting rods 4; the side wall of the positioning sleeve 2 is provided with two short connecting rod giving way long holes, and the driving rod 8 is engraved with a marking line. When the driving rod 8 moves downward, the middle hinge shaft 6 of the four short connecting rods 4 extends out of the two short connecting rod giving way long holes.

[0020] In order to prevent the workpiece from being scratched during the test, a detection wheel 5 is installed on the middle hinge shaft 6 where the four short connecting rods 4 are hinged, and the detection wheel 5 contacts the inner wall of the workpiece.

[0021] Working process

[0022] When inspecting the inner diameter of the truncated cone-shaped cylinder, first install the inspection device into the standard workpiece 10, and adjust the screw-in depth of the positioning rod 1 so that when the lower end of the positioning rod 1 is tightly against the inner bottom of the standard workpiece 10, the outer edge of the centering plate 7 just contacts the inner wall of the mouth of the standard workpiece 10; at the same time, release the driving rod 8, so that the inspection wheel 6 at the middle hinge of the four short connecting rods 4 extends out of the long holes of the two short connecting rods to make way for the middle inner wall of the standard workpiece 10, and record the reading of the mark line on the driving rod 8 at the scale cylinder 9 at this time.

[0023] Then install the detection device into the workpiece 10 to be measured, first detect whether the lower end of the positioning rod 1 and the outer edge of the centering plate 7 can contact the inner bottom and inner wall of the workpiece 10 to be measured at the same time, so as to judge whether the diameter of the inner wall of the mouth of the workpiece 10 to be measured meets the requirements, and then release the driving rod 8, so that the detection wheel 6 at the middle hinge of the four short connecting rods 4 extends out of the long holes of the two short connecting rods to make way for the middle inner wall of the standard workpiece 10, and observe whether the reading of the marking line on the driving rod 8 at the scale cylinder 9 is within the floating range of the recorded reading, so as to judge whether the diameter of the middle inner wall of the workpiece 10 to be measured meets the requirements.

Claims

1. A truncated cone cylinder inner diameter detection device, characterized in that: It includes a centering plate, a graduated cylinder with a hole connected to the upper plate surface of the centering plate, a driving rod inserted in the graduated cylinder, a positioning sleeve fixed to the lower plate surface of the centering plate, a horizontal positioning shaft fixed to the lower end of the inner cavity of the positioning sleeve, and a positioning rod threadedly connected to the center of the lower end plate of the positioning sleeve; The lower end of the driving rod is hinged to the horizontal positioning shaft through four short connecting rods; the side wall of the positioning sleeve is provided with two short connecting rod giving way long holes, and the driving rod is engraved with a marking line. When the driving rod moves downward, the middle hinge shafts of the four short connecting rods extend out of the two short connecting rod giving way long holes.

2. A truncated cone cylinder inner diameter detection device as claimed in claim 1, characterized in that: A detection wheel is installed on a middle hinged shaft hinged by four short connecting rods, and the detection wheel contacts the inner wall of the workpiece.

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