An adjustable inside diameter measuring mechanism

Abstract

The utility model provides a kind of adjustable inner diameter measuring mechanism, to solve the problem of high error and low efficiency of manual measurement of inner diameter in prior art.The utility model mainly includes measurement pedestal, part rotating mechanism, linear displacement component, adjustable measuring mechanism, part to be measured and support assembly;The adjustable inner diameter measuring mechanism provided by the utility model is driven by the symmetrical arrangement and air cylinder of adjustable measuring mechanism, realizes the automatic compatible measurement of different inner diameter sizes within a certain range, without replacing tooling, significantly improves the measurement efficiency and accuracy.At the same time, the cooperative work of part rotating mechanism and linear displacement component ensures the stability and repeatability of the measurement process, suitable for automatic working conditions of mass detection.

Description

Technical Field

[0001] This utility model relates to the field of inspection tool technology, and in particular to an adjustable inner diameter measuring mechanism. Background Technology

[0002] Shafts are a common type of component in machinery, primarily used to support transmission parts, transmit torque, and bear loads. With the continuous development of the machinery industry, the precision requirements for shafts are becoming increasingly stringent, especially in high-speed, high-precision applications, where this directly impacts the machining quality and service life of the parts.

[0003] Currently, traditional methods for measuring shaft parts are still limited to sampling surveys and small-batch inspections, relying on go gauges or inside micrometers to measure the inner diameter, followed by manual sorting. This traditional method, which depends on manual inspection tools, is inefficient, prone to errors, and costly, and can no longer meet the fast-paced production needs of modern enterprises. Utility Model Content

[0004] This application addresses the shortcomings of the prior art by providing an adjustable inner diameter measuring mechanism. Through the symmetrical arrangement of the adjustable measuring mechanism and cylinder drive, it achieves automatic and compatible measurement of different inner diameters within a certain range without the need to change tooling, significantly improving measurement efficiency and accuracy. Simultaneously, the coordinated operation of the part rotation mechanism and the linear displacement component ensures the stability and repeatability of the measurement process, making it suitable for automated high-volume inspection applications.

[0005] The technical solution adopted in this utility model is as follows: An adjustable inner diameter measuring mechanism includes a measuring base, a part rotation mechanism at the center of the measuring base, a part to be measured that can be driven to rotate mounted on the part rotation mechanism, and a linear displacement assembly mounted on the measuring base. The free end of the linear displacement assembly has two sets of opposing support assemblies, the height of each set of support assemblies matching the height of the inner hole of the part to be measured. Each set of support assemblies has an adjustable measuring mechanism on its top surface. The two sets of mutually cooperating adjustable measuring mechanisms are configured to insert their bodies into the inner hole of the part to be measured via the linear displacement assembly. When the detection end of each set of adjustable measuring mechanisms contacts the inner hole wall, the part rotation mechanism drives the part to be measured to rotate, thus achieving measurement.

[0006] Furthermore, the part rotation mechanism includes a pair of bases arranged opposite each other on the measuring base, each base being provided with a support roller capable of free rotation, and a mounting plate penetrating the measuring base is connected below the base. A servo motor is provided below the measuring base, and the drive end of the servo motor is connected to a spline transmission mechanism, which is connected to the axle of the support roller via a belt drive.

[0007] Furthermore, the linear displacement assembly includes a linear module mounted on a measuring base, a drag chain mounted on one side of the linear module, and a connecting plate mounted on the free end of the linear module. One end of the connecting plate has a limiting hole for connecting a support assembly.

[0008] Furthermore, the support component includes a support plate, two sets of opposing support columns disposed on the support plate, the support columns being provided with dovetail grooves for mounting an adjustable measuring mechanism, and a limit post being provided at one end of the support plate.

[0009] Furthermore, it also includes a guiding mechanism, which includes a set of guide rails disposed on the measuring base, and multiple sliders disposed on the guide rails, with the sliders on opposite guide rails being connected together to the support plate.

[0010] Furthermore, the adjustable measuring component includes a set of movable blocks and fixed blocks that are combined with each other. The fixed blocks are mounted on the support component. The front and rear parts of the fixed blocks and movable blocks are respectively provided with continuous cavities. A compressible spring is provided in the front cavity, and a cylinder and a striker connected to the cylinder drive end and extending into the other end are provided in the rear cavity. A clamping sleeve and a sensor are provided in the rear part of the fixed block. A probe fixing component and a block gauge probe connected to the probe fixing component are provided on the outside of the movable block.

[0011] Furthermore, two sets of ball bearing bushings are connected between the movable block and the fixed block.

[0012] The advantages of this utility model over the prior art are as follows: This invention transmits the rotational motion of a servo motor to a roller via a transmission mechanism, thereby driving the part to rotate. At the detection end, a linear motor mechanism and a support mechanism provide support and displacement of freedom, accurately sending the probe into the inner hole of the part to be measured. Through the stroke of the probe, measurements of cross-sections at different depths can be achieved. It can realize automatic measurement and adaptive compatibility of inner diameter dimensions within a certain range, which can significantly improve the online measurement speed and reduce the changeover cycle. Attached Figure Description

[0013] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3 A schematic diagram showing the installation of the rollers; Figure 4 A schematic diagram of the supporting components; Figure 5 This is a schematic diagram of the linear displacement component. Figure 6This is a schematic diagram of the adjustable measuring mechanism.

[0014] Among them: 1. Measuring base; 2. Part rotation mechanism; 21. Servo motor; 22. Spline transmission mechanism; 23. Belt transmission mechanism; 24. Base; 25. Mounting plate; 26. Support rollers; 3. Linear displacement assembly; 31. Linear module; 32. Cable carrier; 33. Connecting plate; 34. Limiting hole; 4. Adjustable measuring mechanism; 41. Gauge clamp; 42. Sensor; 43. Movable block; 44. Fixed block; 45. Probe holder; 46. Gauge probe; 47. Ball bushing; 48. Compression spring; 49. Cylinder; 50. Impact pin; 5. The part to be tested; 6. Support components; 61. Support plate; 62. Support column; 63. Limiting column; 7. Guide rail; 8. Slider. Detailed Implementation

[0015] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0016] like Figures 1 to 6 As shown, this embodiment provides an adjustable inner diameter automatic measuring mechanism, mainly including a measuring base 1, a part rotation mechanism 2, a linear displacement assembly 3, a support assembly 6, and an adjustable measuring mechanism 4. The part rotation mechanism 2 is located at the center of the measuring base 1 and is used to install and drive the part 5 to be measured to rotate; the linear displacement assembly 3 is installed on the measuring base 1, and two sets of opposing support assemblies 6 are installed on its free end. The adjustable measuring mechanisms 4 are respectively installed on the support assemblies 6 to realize the automatic measurement of the inner diameter of the part.

[0017] In one embodiment of this utility model, the part rotation mechanism 2 comprises a servo motor 21, a spline transmission mechanism 22, a belt transmission mechanism 23, and a support roller 26. A pair of bases 24 are symmetrically arranged on the measuring base 1, and each base 24 is equipped with a freely rotatable roller. The roller is in line contact with the part to be measured 5, driving the part to be measured 5 to rotate. A mounting plate 25 is connected below the base 24. The servo motor 21 is mounted below the measuring base 1, and its output end is connected to the belt transmission mechanism 23 through the spline transmission mechanism 22. The belt transmission mechanism 23 further transmits power to the axle of the roller, thereby driving the part to be measured 5 to rotate clockwise at a low speed of about 1 revolution per second. This design ensures stable rotation of the part during measurement, providing uniform contact conditions for inner diameter measurement.

[0018] In one embodiment of this utility model, the linear displacement assembly 3 includes a linear module 31, a cable carrier 32, and a connecting plate 33. The linear module 31 is fixed on the measuring base 1, and the cable carrier 32 is used to protect the cable as it moves. The connecting plate 33 is installed at the moving end of the linear module 31, and one end of the connecting plate 33 is provided with a limiting hole 34 for connecting with the limiting post 63 of the support assembly 6. Through the precise movement of the linear module 31, the support assembly 6 and its adjustable measuring mechanism 4 can be driven to move horizontally, accurately inserting or withdrawing the probe into or out of the inner hole of the part to be measured 55.

[0019] In one embodiment of this utility model, each set of support components 6 includes a support plate 61 and two sets of oppositely arranged support columns 62. The support columns 62 are provided with dovetail grooves for installing the fixing block 44 of the adjustable measuring mechanism 4. One end of the support plate 61 is provided with a limiting post 63, which cooperates with the limiting hole 34 on the linkage plate 33 to realize the transmission of force.

[0020] In one embodiment of this utility model, a guiding mechanism is also provided, including a pair of parallel guide rails 7 and four sliders 8; the guide rails 7 are fixed on the measuring base 1, and the sliders 8 are connected to the support plate 61 to ensure that the support assembly 6 is stable and does not shake during linear displacement.

[0021] In one embodiment of this utility model, the adjustable measuring mechanism 4 is mainly composed of a clamping sleeve 41, a sensor 42, a movable block 43, a fixed block 44, a probe fixing component 45, a gauge probe 46, a ball bushing 47, a compression spring 48, a cylinder 49, and a striking pin 50.

[0022] The fixed block 44 is mounted on the support column 62 via a dovetail groove. The movable block 43 is assembled with the fixed block 44, and two sets of ball bushings 47 are provided between them to ensure the accuracy and guidance of the movable block 43 in the linear direction. A compression spring 48 is provided in the front cavity, and a cylinder 49 is provided in the rear cavity. The piston rod of the cylinder 49 is connected to the movable block 43 via a striker pin 50, which pushes the movable block 43, the gauge probe 46 fixing piece 45, and the gauge probe 46 forward to realize the extension and retraction of the probe.

[0023] Sensor 42 is installed inside gauge sleeve 41 to detect the displacement of the probe in real time and transmit the signal to the control system to calculate the inner diameter.

[0024] The specific working principle of the measurement process: Step 1: The part to be tested 5 is placed on the support roller 26; Step 2: The linear displacement component 3 actuates, driving the support component 6 forward via the connecting plate 33, so that the two adjustable measuring mechanisms 4 enter the inner hole of the part to be measured 5. At this time, the gauge block probe 46 is in the retracted state.

[0025] Step 3: Probe Contact: Cylinder 49 pushes movable block 43 forward, causing the gauge probe 46 to extend and contact the inner hole wall. Sensor 42 collects displacement data in real time.

[0026] Step 4: Rotation measurement. The servo motor 21 starts and drives the support roller 26 to rotate through the spline transmission mechanism 22 and the belt transmission mechanism 23, causing the part to be measured 5 to rotate at a low speed. As the part continues to rotate, the gauge block probe 46 scans multiple sections along the inner hole wall, and the sensor 42 records the data at each point. The external system calculates the inner diameter dimension based on the signal from the sensor 42.

[0027] Step 5: Reset, or perform the next measurement.

[0028] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. An adjustable inner diameter measuring mechanism, characterized in that: The device includes a measuring base (1), a part rotation mechanism (2) is provided at the center of the measuring base (1), a part to be measured (5) is mounted on the part rotation mechanism (2) and can be driven to rotate, and a linear displacement assembly (3) is provided on the measuring base (1). The free end of the linear displacement assembly (3) is provided with two sets of opposing support assemblies (6). The height of each set of support assemblies (6) matches the height of the inner hole of the part to be measured (5). The top surface of each set of support assemblies (6) is provided with an adjustable measuring mechanism (4). The two sets of adjustable measuring mechanisms (4) are configured to send their bodies into the inner hole of the part to be measured (5) through the linear displacement assembly (3). When the detection end of each set of adjustable measuring mechanisms (4) contacts the inner hole wall, the part rotation mechanism (2) drives the part to be measured (5) to rotate to achieve measurement.

2. The adjustable inner diameter measuring mechanism as described in claim 1, characterized in that: The part rotation mechanism (2) includes a pair of bases (24) arranged opposite to each other on the measuring base (1). Each base (24) is provided with a support roller (26) that can rotate freely. A mounting plate (25) that penetrates the measuring base (1) is also connected below the base (24). A servo motor (21) is provided below the measuring base (1). The drive end of the servo motor (21) is connected to a spline transmission mechanism (22). The spline transmission mechanism (22) is connected to the axle of the support roller (26) by belt drive.

3. The adjustable inner diameter measuring mechanism as described in claim 1, characterized in that: The linear displacement assembly (3) includes a linear module (31) disposed on the measuring base (1), a drag chain (32) disposed on one side of the linear module (31), and a connecting plate (33) disposed on the free end of the linear module (31). One end of the connecting plate (33) has a limiting hole (34) for connecting the support assembly (6).

4. The adjustable inner diameter measuring mechanism as described in claim 1, characterized in that: The support assembly (6) includes a support plate (61), two sets of oppositely arranged support columns (62) on the support plate (61), the support columns (62) are provided with dovetail grooves for installing the adjustable measuring mechanism (4), and a limit post (63) is provided at one end of the support plate (61).

5. The adjustable inner diameter measuring mechanism as described in claim 4, characterized in that: It also includes a guiding mechanism, which includes a set of guide rails (7) disposed on the measuring base (1), and a plurality of sliders (8) disposed on the guide rails (7), with the sliders (8) on the opposite guide rails (7) being connected together to the support plate (61).

6. The adjustable inner diameter measuring mechanism as described in claim 1, characterized in that: The adjustable measuring mechanism includes a set of movable blocks (43) and fixed blocks (44) that are combined with each other. The fixed blocks (44) are mounted on the support assembly (6). The front and rear parts of the fixed blocks (44) and movable blocks (43) are respectively provided with continuous cavities. A compressible spring is provided in the front cavity, and a cylinder (49) and a striker (50) connected to the driving end of the cylinder (49) and extending into the other end are provided in the rear cavity. A gauge sleeve (41) and a sensor (42) are provided in the rear part of the fixed block (44). A probe fixing part (45) and a block gauge probe (46) connected to the probe fixing part (45) are provided on the outside of the movable block (43).

7. The adjustable inner diameter measuring mechanism as described in claim 6, characterized in that: Two sets of ball bushings (47) are also connected between the movable block (43) and the fixed block (44).

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