Device for detecting coaxiality of cylindrical curved surface

Abstract

The utility model relates to the technical field of coaxiality detection, and discloses a cylindrical curved surface coaxiality detection device, which comprises a first detected workpiece and a second detected workpiece, the spring expansion sleeve is arranged in the first tested workpiece; the core shaft is mounted on one side of the spring expansion sleeve, and the core shaft and the spring expansion sleeve are coaxially arranged; the locking pressing plate is installed in the first tested workpiece, the locking pressing plate makes contact with the spring expansion sleeve, and the locking pressing plate and the mandrel are arranged on the same side; the dial indicator is installed at the end of the mandrel through a bearing, the bearing is installed at the end of the mandrel, the dial indicator is installed on the surface of the bearing, and a measuring head of the dial indicator makes contact with the side wall of the inner hole of the second measured workpiece. According to the utility model, through the expansion sleeve locking principle, the processing error of the inner hole can be compensated, and the fit clearance or error between the detection mandrel and the detected workpiece can be eliminated, so that the coaxiality detection precision can be improved. The device can be used for detecting the coaxiality of different cylindrical curved surfaces of a single part, and can also be used for detecting the assembly coaxiality of different parts of an assembly product.

Description

Technical Field

[0001] The utility model relates to the technical field of coaxiality detection, in particular to a detection device for the coaxiality of a cylindrical surface. Background Art

[0002] After the product parts are assembled, it is necessary to make the two holes of the parts located on the same axis after assembly. If there is an error in the assembly, problems such as large running resistance, abnormal noise, and severe wear often occur during use. However, due to the difficulty in detecting the coaxiality of each part after assembly during the part assembly process, it is very difficult to accurately determine where the problem lies when such problems occur, and at the same time, the assembly accuracy of the product cannot be guaranteed. Therefore, in the assembly process of parts and products with high coaxiality requirements, it is particularly important to accurately and quickly determine whether their assembly accuracy meets the requirements. Therefore, there is an urgent need for a detection device for the coaxiality of a cylindrical surface to realize the problem of quickly and accurately detecting the coaxiality of parts and products of a cylindrical surface, and to ensure that the assembled products or parts meet the use requirements. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a detection device for the coaxiality of a cylindrical surface to solve the problem of difficult coaxiality detection during the part assembly process.

[0004] The utility model provides a detection device for the coaxiality of a cylindrical surface, including:

[0005] A workpiece to be measured, including a first workpiece to be measured and a second workpiece to be measured, the first workpiece to be measured is connected to the second workpiece to be measured;

[0006] A spring expansion sleeve, installed inside the first workpiece to be measured;

[0007] A mandrel, installed on one side of the spring expansion sleeve, the mandrel is coaxially arranged with the spring expansion sleeve;

[0008] A locking pressure plate, installed on the mandrel, the locking pressure plate is in contact with the spring expansion sleeve, and the locking pressure plate is arranged on the same side as the mandrel;

[0009] A dial indicator, the dial indicator is installed at the end of the mandrel through a bearing, the bearing is installed at the end of the mandrel, the dial indicator is installed on the surface of the bearing, and the measuring head of the dial indicator is in contact with the inner hole side wall of the second workpiece to be measured.

[0010] Preferably, the spring expansion sleeve matches the inner hole of the first workpiece to be measured, and the spring expansion sleeve is clamped with the first workpiece to be measured.

[0011] Preferably, the locking pressure plate is threadedly connected to one end of the mandrel, and one end of the locking pressure plate is in contact with the spring expansion sleeve.

[0012] Preferably, the second workpiece to be measured is mounted on the side wall of the first workpiece to be measured through a pin.

[0013] Preferably, the locking pressing plate is an annular pressing plate, and the inner conical surface of the spring expansion sleeve matches the outer conical surface of the mandrel.

[0014] Preferably, two card slot positions are provided on the mandrel for installing axial retaining rings. The bearings are arranged between the retaining rings, and the retaining rings are used to limit and fix the bearings.

[0015] Preferably, fixing blocks are arranged on the surface of the bearings. The fixing blocks are connected to the bracket, and the dial indicator is installed on the bracket.

[0016] Preferably, the measuring head of the dial indicator is perpendicular to the axis of the second workpiece to be measured.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. There are machining errors in the inner holes of the machined parts. Through the principle of expansion sleeve locking, the machining errors of the inner holes can be compensated, and the fitting clearance or error between the measuring mandrel and the workpiece to be measured can be eliminated, thereby improving the coaxiality detection accuracy. It can be used for the coaxiality detection of different cylindrical surfaces of a single part, and can also be used for the assembly coaxiality detection of different components of an assembled product.

[0019] 2. The present utility model can accurately measure the coaxiality of the cylindrical surface by using precision measuring tools such as a spring expansion sleeve, a mandrel, and a dial indicator, avoiding the errors and inaccuracies existing in the traditional measuring methods.

[0020] 3. The device has a simple structure and is easy to operate, and can quickly complete the measurement of the coaxiality of the cylindrical surface, improving the measurement efficiency. It is applicable to the coaxiality measurement of cylindrical surfaces with various different diameters and lengths, and has strong versatility and flexibility. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model, and those of ordinary skill in the art can also obtain other drawings according to the provided drawings without creative efforts.

[0022] Figure 1 It is the front view sectional view of a detection device for the coaxiality of a cylindrical surface of the present utility model;

[0023] Figure 2It is a side view sectional view of a detection device for the coaxiality of a cylindrical curved surface of the present utility model.

[0024] Among them, 1. The first workpiece to be measured; 2. The second workpiece to be measured; 3. Spring expansion sleeve; 4. Mandrel; 5. Locking pressure plate; 6. Dial indicator; 7. Bearing; 8. Retaining ring; 9. Fixed block; 10. Bracket. Specific implementation manners

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0026] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0027] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plurality" is two or more.

[0028] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0029] As Figure 1 、 Figure 2 shown, the present utility model provides a detection device for the coaxiality of a cylindrical curved surface, including:

[0030] Workpieces to be measured, including the first workpiece to be measured 1 and the second workpiece to be measured 2, and the first workpiece to be measured 1 is connected to the second workpiece to be measured 2;

[0031] The spring expansion sleeve 3 is installed inside the first workpiece to be measured 1;

[0032] The mandrel 4 is installed on one side of the spring expansion sleeve 3, and the mandrel 4 is coaxially arranged with the spring expansion sleeve 3;

[0033] The locking pressure plate 5 is installed on the mandrel 4. The locking pressure plate 5 contacts the spring expansion sleeve 3, and the locking pressure plate 5 is arranged on the same side as the mandrel 4;

[0034] The dial indicator 6 is installed at the end of the mandrel 4 through the bearing 7. The bearing 7 is installed at the end of the mandrel 4, and the dial indicator 6 is installed on the surface of the bearing 7. Moreover, the probe of the dial indicator 6 contacts the inner hole side wall of the second workpiece to be measured 2.

[0035] The detection device for the coaxiality of cylindrical surfaces provided by the present utility model realizes the accurate detection of the coaxiality of the workpieces to be measured by designing structures such as a spring expansion sleeve, a mandrel, a locking pressure plate, and a dial indicator. Since the mandrel is coaxially arranged with the spring expansion sleeve, and the probe of the dial indicator contacts the inner hole side wall of the second workpiece to be measured, the coaxiality condition between the workpieces to be measured can be accurately reflected, improving the detection accuracy. By installing the locking pressure plate to fix the spring expansion sleeve inside the workpiece to be measured and using the dial indicator for reading, the whole detection process is simple and fast, reducing the detection difficulty and labor intensity. This detection device is not only applicable to the coaxiality detection of cylindrical surfaces, but can also be appropriately improved according to needs to adapt to the coaxiality detection of workpieces with other shapes and sizes, having high versatility and flexibility.

[0036] In some embodiments of the present application, the spring expansion sleeve 3 matches the inner hole of the first workpiece to be measured 1, and the spring expansion sleeve 3 is clamped with the first workpiece to be measured 1.

[0037] In this embodiment, by designing the precise match between the spring expansion sleeve 3 and the inner hole of the first workpiece to be measured 1, the stability and accuracy in the measurement process are ensured, effectively avoiding measurement errors caused by size mismatches. The spring expansion sleeve 3 and the first workpiece to be measured 1 adopt a clamping connection method. This connection method not only simplifies the operation steps but also improves the installation and disassembly efficiency, contributing to the improvement of the overall work efficiency.

[0038] In some embodiments of the present application, the locking pressure plate 5 is threadedly connected to one end of the mandrel 4, and one end of the locking pressure plate 5 contacts the spring expansion sleeve 3. The second workpiece to be measured 2 is installed on the side wall of the first workpiece to be measured 1 through a pin.

[0039] In this embodiment, the locking pressing plate 5 is threadedly connected to the mandrel 4. By using the threaded connection method for locking, the relative movement between the workpiece under test and the spring expansion sleeve 3 during the test is effectively prevented, improving the accuracy and reliability of the test. The inner hole conical surface design of the spring expansion sleeve 3 can be adjusted to a certain extent by cooperating with the outer conical surface of the mandrel 4 to adapt to workpieces under test of different sizes, enhancing the versatility and flexibility of the device.

[0040] In some embodiments of the present application, the locking pressing plate 5 is an annular pressing plate. One end of the mandrel 4 is provided with an external thread, and the internal thread of the locking pressing plate 5 matches the external thread of the mandrel 4. One end of the locking pressing plate 5 is in contact with one end of the spring expansion sleeve 3.

[0041] In this embodiment, a conical surface fitting locking mechanism is adopted. Combining the conical surface fitting design of the spring expansion sleeve 3 and the mandrel 4, the threaded connection design between the locking pressing plate 5 and the mandrel 4 makes the disassembly and assembly process simpler and faster, reducing the maintenance cost and time.

[0042] In some embodiments of the present application, two slot positions are provided on the mandrel 4 for installing the axial retaining rings 8. The bearing 7 is arranged between the retaining rings 8, and the retaining rings 8 are used to limit and fix the bearing 7.

[0043] In this embodiment, by setting the retaining rings 8 on the mandrel 4 and arranging the bearing 7 between the two retaining rings 8, it can ensure that the bearing 7 maintains a stable axial position during operation, reduce the vibration caused by axial movement, and improve the running smoothness of the overall equipment. The setting of the retaining rings 8 limits the axial movement of the bearing 7, reduces the wear between the bearing 7 and adjacent components, thereby effectively extending the service life of the bearing 7 and reducing the maintenance cost and replacement frequency.

[0044] In some embodiments of the present application, fixing blocks 9 are arranged on the surface of the bearing 7. The fixing blocks 9 are connected to the support 10, and the dial indicator 6 is installed on the support 10.

[0045] In this embodiment, by arranging the fixing blocks 9 on the surface of the bearing 7 and firmly connecting them to the support 10, the stability of the dial indicator 6 during installation and measurement is ensured, thereby effectively avoiding measurement errors caused by shaking or loosening and improving the measurement accuracy. Installing the dial indicator 6 directly on the support 10 that is closely connected to the surface of the bearing 7 makes the measurement operation more convenient and direct. The operator can quickly complete the measurement task without frequently adjusting the position or angle of the measuring tool, improving the work efficiency. The tight combination of the fixing blocks 9 and the support 10 provides a stable support platform for the dial indicator 6. Even in a long-term or high-load measurement environment, the stability of the measuring tool can be maintained, ensuring the reliability and consistency of the measurement results.

[0046] In some embodiments of the present application, the probe of the dial indicator 6 is perpendicular to the axis of the second workpiece to be measured 2.

[0047] In this embodiment, by keeping the probe of the dial indicator 6 perpendicular to the axis of the second workpiece to be measured 2, it is ensured that the contact surface between the probe and the workpiece during the measurement is minimized, reducing the measurement error caused by too large a contact area or angular deviation, thereby significantly improving the accuracy and precision of the measurement. The perpendicular contact method helps to maintain the stability during the measurement process, avoiding fluctuations in the measurement data caused by unstable contact between the probe and the workpiece, and providing a more reliable basis for subsequent data analysis and processing.

[0048] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A detection device for the coaxiality of a cylindrical surface, characterized in that, Including: Workpieces to be measured, including a first workpiece to be measured and a second workpiece to be measured, the first workpiece to be measured being connected to the second workpiece to be measured; A spring expansion sleeve, installed inside the first workpiece to be measured; A mandrel, installed on one side of the spring expansion sleeve, the mandrel being coaxially arranged with the spring expansion sleeve; A locking pressure plate, installed on the mandrel, the locking pressure plate being in contact with the spring expansion sleeve, and the locking pressure plate being arranged on the same side as the mandrel; A dial indicator, the dial indicator being installed at the end of the mandrel through a bearing, the bearing being installed at the end of the mandrel, the dial indicator being installed on the surface of the bearing, and the probe of the dial indicator being in contact with the inner hole side wall of the second workpiece to be measured.

2. The detecting device for the coaxiality of a cylindrical curved surface according to claim 1, characterized in that, The spring expansion sleeve matches the inner hole of the first workpiece to be measured, and the spring expansion sleeve is clamped to the first workpiece to be measured.

3. The detection device for the coaxiality of a cylindrical curved surface according to claim 1, characterized in that, The locking pressure plate is threadedly connected to one end of the mandrel, and one end of the locking pressure plate is in contact with the spring expansion sleeve.

4. The detection device for the coaxiality of a cylindrical curved surface according to claim 3, wherein, The second workpiece to be measured is installed on the side wall of the first workpiece to be measured through a pin.

5. The detection device for the coaxiality of a cylindrical surface according to claim 1, characterized in that, The locking pressure plate is an annular pressure plate, and the inner hole conical surface of the spring expansion sleeve matches the outer conical surface of the mandrel.

6. The detection device for the coaxiality of a cylindrical surface according to claim 1, characterized in that, Two card slot positions are provided on the mandrel for installing axial retaining rings, the bearing is arranged between the retaining rings, and the retaining rings are used for limiting and fixing the bearing.

7. The coaxiality detection device for cylindrical curved surfaces according to claim 1, characterized in that, A fixing block is arranged on the surface of the bearing, the fixing block is connected to a bracket, and the dial indicator is installed on the bracket.

8. The coaxiality detection device for cylindrical curved surfaces according to claim 1, wherein, The probe of the dial indicator is perpendicular to the axis of the second workpiece to be measured.

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