Automatic inner diameter measuring device

Abstract

An automatic inner diameter measuring device comprises a support, an electric telescopic cylinder is arranged on the support, an electric telescopic rod of the electric telescopic cylinder penetrates through the support, and the bottom of the electric telescopic rod is fixedly connected with an inner diameter gauge. The inner diameter gauge comprises a rotating cylinder, a cylinder body of the rotating cylinder is fixed at the tail end of the electric telescopic rod, a measuring support is installed on a rotating shaft of the rotating cylinder, a through hole is formed in the bottom of the measuring support, a sleeve is arranged in the through hole, and the sleeve is fixed in the through hole of the measuring support through a spherical self-aligning bearing. And a chord diameter measuring dial gauge is arranged in the sleeve. The beneficial effects of the utility model are that the measuring device is an automatic inner diameter measuring mechanism, adopts a chord diameter measuring method, has self-calibration capability, and is accurate and reliable in measuring result.

Description

Technical Field

[0001] The utility model belongs to the technical field of precision measurement, in particular to a method and equipment for measuring inner diameter dimensions. Background Art

[0002] Internal diameter measurement is an important branch of precision measurement. Currently, there are two ways to measure internal diameter: manual measurement and automatic measurement, each with its own advantages and disadvantages. Manual measurement is inefficient, and the measurement results of different people vary greatly. Automatic measurement often uses a two-point measurement method, which has high requirements for the coaxiality between the measuring mechanism and the center line of the hole, resulting in high processing costs, high costs, and difficult to ensure measurement accuracy. Utility Model Content

[0003] The technical problem to be solved by the utility model is: how to improve the self-calibration capability and the measurement accuracy, and to provide an automatic inner diameter measuring device.

[0004] The technical solution of the utility model is specifically as follows:

[0005] An automatic inner diameter measuring device comprises a support, an electric telescopic cylinder is arranged on the support, an electric telescopic rod of the electric telescopic cylinder passes through the support, and an inner diameter gauge is fixedly connected to the bottom of the electric telescopic rod;

[0006] The inner diameter gauge includes a rotating cylinder, the cylinder body of the rotating cylinder is fixed at the end of the electric telescopic rod, a measuring bracket is installed on the rotating axis of the rotating cylinder, a through hole is provided at the bottom of the measuring bracket, a sleeve is provided in the through hole, the sleeve is fixed in the through hole of the measuring bracket through a spherical self-aligning bearing, and a chord diameter measuring micrometer is provided in the sleeve.

[0007] A cylinder body of a telescopic cylinder is hinged on the measuring bracket, an output rod of the telescopic cylinder is connected with a sleeve, and the telescopic cylinder and a chord diameter measuring micrometer are located on both sides of the measuring bracket.

[0008] The output rod of the telescopic cylinder is fixedly connected to the sleeve through an L-shaped bracket.

[0009] The chord diameter measuring micrometer comprises a horizontal table base at the bottom, a vertical table head is connected to the horizontal table base via a connecting rod, and a spring is arranged between the connecting rod and the measuring bracket.

[0010] Two tripods are arranged on the measuring bracket, and a connecting rod of the chord diameter measuring micrometer is located between the two tripods.

[0011] The beneficial effects of the utility model are as follows: the measuring device is an automatic inner diameter measuring mechanism, adopts a chord diameter measuring method, has a self-calibration capability, and the measuring result is accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the structure of the inner diameter gauge. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] like Figure 1 As shown, an automatic inner diameter measuring device includes a support 4, the support 4 includes a top plate and a vertical support rod, an electric telescopic cylinder 1 is arranged on the support 4, the electric telescopic rod 2 of the electric telescopic cylinder 1 passes through the top plate of the support 4, and the bottom of the electric telescopic rod 2 is fixedly connected with an inner diameter gauge 3.

[0016] The inner diameter gauge 3 includes a rotating cylinder 5, the cylinder body of the rotating cylinder 5 is fixed at the end of the electric telescopic rod 2, a measuring bracket 6 is installed on the rotating axis of the rotating cylinder 5, a through hole is provided at the bottom of the measuring bracket 6, a sleeve 8 is provided in the through hole, the sleeve 8 is fixed in the through hole of the measuring bracket 6 through a spherical self-aligning bearing 10, and a chord diameter measuring micrometer 9 is provided in the sleeve 8.

[0017] Furthermore, the cylinder body of the telescopic cylinder 7 is hinged on the measuring bracket 6, the output rod of the telescopic cylinder 7 is connected to the sleeve 8, and the telescopic cylinder 7 and the chord diameter measuring micrometer 9 are located on both sides of the measuring bracket 6. Specifically, the output rod of the telescopic cylinder 7 is fixedly connected to the sleeve 8 through an L-shaped bracket. It should be noted that when the output rod of the telescopic cylinder 7 is extended, one end of the sleeve 8 moves downward, and the other end of the sleeve 8 moves upward, so that the chord diameter measuring micrometer 9 also moves upward.

[0018] It should be noted that the chord diameter measuring micrometer 9 includes a horizontal base 91 at the bottom, a vertical gauge head 93 is connected to the horizontal base 91 via a connecting rod 92, and a spring 11 is provided between the connecting rod 92 and the measuring bracket 6.

[0019] Furthermore, two tripods 94 are provided on the measuring bracket 6 , and the connecting rod 92 of the chord diameter measuring micrometer 9 is located between the two tripods 94 .

[0020] The working principle of the utility model is:

[0021] The electric telescopic cylinder 1 moves up and down with the inner diameter gauge 3 through the electric telescopic rod 2, so that the chord diameter measuring micrometer 9 located at the bottom of the measuring bracket 6 also moves up and down to measure different sections. The rotating cylinder 5 rotates with the chord diameter measuring micrometer 9 through the measuring bracket 6 to measure the diameters of multiple points. The chord diameter measuring micrometer 9 is inserted into the sleeve 8, and the sleeve 8 is fixed in the hole of the measuring bracket 6 through the spherical self-aligning bearing 10. The telescopic cylinder 7 swings up and down with the spherical self-aligning bearing 10 as the center of the circle with the chord diameter measuring micrometer 9, so that the chord length arm of the chord diameter measuring micrometer 9 presses the inner diameter section, and the minimum value measured by the diameter arm is the diameter of the measured inner diameter section. The chord diameter measuring micrometer 9 is clamped between the two tripods of the measuring bracket 6 and installed non-fixedly. Under the action of the spring 11, the telescopic cylinder 7 and the spherical self-aligning bearing 10, the chord diameter measuring micrometer 9 has an adaptive adjustment function to ensure the accuracy of the measured diameter. The chord diameter measuring micrometer 9 has a communication module, which can realize the automatic collection of the measured diameter value. And when measuring different diameters, the spring can be removed to easily replace the micrometers of different specifications.

[0022] After the measurement is completed, the telescopic cylinder 1 lifts the measuring bracket 6 so that the measuring arm of the chord diameter measuring micrometer 9 is inside the inner diameter gauge 3, and the chord diameter measuring micrometer 9 is calibrated to prepare for the next measurement.

[0023] The advantages of this device are: 1) It can automatically measure the inner diameter with the chord diameter method with the help of the inner diameter micrometer. 2) It has an adaptive adjustment function to ensure the accuracy of the measured diameter. 3) The micrometer can be calibrated for each measurement to ensure the reliability of the diameter measurement.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. An automatic inner diameter measuring device, characterized in that: It comprises a support (4), an electric telescopic cylinder (1) is arranged on the support (4), an electric telescopic rod (2) of the electric telescopic cylinder (1) passes through the support (4), and an inner diameter gauge (3) is fixedly connected to the bottom of the electric telescopic rod (2); The inner diameter gauge (3) comprises a rotary cylinder (5), the cylinder body of the rotary cylinder (5) is fixed to the end of the electric telescopic rod (2), a measuring bracket (6) is installed on the rotating shaft of the rotary cylinder (5), a through hole is provided at the bottom of the measuring bracket (6), a sleeve (8) is provided in the through hole, the sleeve (8) is fixed in the through hole of the measuring bracket (6) through a spherical self-aligning bearing (10), and a chord diameter measuring micrometer (9) is provided in the sleeve (8).

2. The automatic inner diameter measuring device according to claim 1, characterized in that: The cylinder body of a telescopic cylinder (7) is hingedly connected to the measuring bracket (6), the output rod of the telescopic cylinder (7) is connected to the sleeve (8), and the telescopic cylinder (7) and the chord diameter measuring micrometer (9) are located on both sides of the measuring bracket (6).

3. The automatic inner diameter measuring device according to claim 2, characterized in that: The output rod of the telescopic cylinder (7) is fixedly connected to the sleeve (8) via an L-shaped bracket.

4. The automatic inner diameter measuring device according to claim 1, characterized in that: The chord diameter measuring micrometer (9) comprises a transverse gauge seat (91) at the bottom, a vertical gauge head (93) is connected to the transverse gauge seat (91) via a connecting rod (92), and a spring (11) is provided between the connecting rod (92) and the measuring bracket (6).

5. The automatic inner diameter measuring device according to claim 4, characterized in that: Two tripods (94) are arranged on the measuring bracket (6), and a connecting rod (92) of the chord diameter measuring micrometer (9) is located between the two tripods (94).

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