Outer cylinder coaxiality detection device

Abstract

The utility model belongs to the technical field of detection tools, and particularly relates to an outer cylinder coaxiality detection device which is used for detecting the coaxiality of a workpiece to be detected, the workpiece to be detected comprises a reference cylinder and a detected cylinder, the outer cylinder coaxiality detection device comprises an obliquely arranged detection platform, and the top surface of the detection platform is a smooth surface. The top surface of the detection platform is provided with a plurality of positioning holes, the plurality of positioning holes are arranged in an arc form, at least two positioning holes are provided with positioning columns, the side surfaces of the positioning columns are contacted with the side surface of a reference cylinder of a to-be-detected workpiece, and the top surface of the detection platform is also magnetically connected with a lever dial indicator. And a floating probe in the lever dial indicator is in contact with the side surface of the detected cylinder of the to-be-detected workpiece. According to the utility model, the actual coaxiality variation of the to-be-detected workpiece can be accurately obtained, and obvious deviation between the coaxiality detection result of the to-be-detected workpiece and the actual coaxiality of the to-be-detected workpiece is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection tools, and particularly relates to an external cylinder coaxiality detection device. Background Art

[0002] For a special gear shaft of a robot, to ensure the smooth operation of the bearings at both ends, the coaxiality requirements for both ends are relatively high, and it is necessary to detect and control the actual processing process. Conventionally, a coordinate measuring machine is used to detect the coaxiality of the special gear shaft of the robot. However, the existing coordinate measuring machine has the following problems:

[0003] 1) When a coordinate measuring machine is used to detect the gear shaft of a robot, due to the short length of the reference cylinder and the long relative distance of the measuring body, the conventional use of a coordinate measuring machine will amplify the detection error, resulting in an obvious deviation between the detection result and the actual coaxiality, and the detection accuracy is not good;

[0004] 2) Conventional coordinate measuring machine detection has high requirements for equipment and extremely low detection efficiency, and it is impossible to achieve online rapid detection and overall screening.

[0005] To solve the problems of the deviation between the instrument detection result and the product physical object and the efficiency, the utility model designs a simple external cylinder coaxiality detection device that conforms to the actual application state of the product, so as to achieve rapid and accurate detection of the gear shaft. Summary of the Utility Model

[0006] The problem to be solved by the utility model is that there is an obvious deviation between the coaxiality detection result of the workpiece to be detected by the coordinate measuring machine and the actual coaxiality of the workpiece to be detected.

[0007] To solve the above technical problems, the utility model provides the following technical solutions:

[0008] An external cylinder coaxiality detection device is used to detect the coaxiality of a workpiece to be detected. The workpiece to be detected includes a reference cylinder and a measured cylinder. The external cylinder coaxiality detection device includes an inclined detection platform. The top surface of the detection platform is a smooth surface. A plurality of positioning holes are arranged on the top surface of the detection platform. The plurality of positioning holes are arranged in an arc form. At least two of the positioning holes are provided with positioning columns. The side surface of the positioning column contacts the side surface of the reference cylinder of the workpiece to be detected. A lever dial indicator is magnetically connected to the top surface of the detection platform. The floating probe in the lever dial indicator contacts the side surface of the measured cylinder of the workpiece to be detected.

[0009] Further, a platform support base is threadedly connected to the bottom of the detection platform.

[0010] Further, the platform support base is formed by enclosing a back plate, two side plates and a bottom plate. The side plates are right-angled triangles; the detection platform is threadedly connected to the two side plates.

[0011] Further, the included angle between the detection platform and the bottom plate of the platform support base is 30°.

[0012] Further, a magnetic layer is provided on the detection platform.

[0013] Further, the lever dial indicator has a mounting base and a floating probe. The mounting base is magnetically connected to the detection platform; the floating probe is in contact with the side surface of the cylindrical workpiece to be measured.

[0014] Further, the positioning hole is a threaded hole, and the positioning post is a positioning nut gasket.

[0015] Further, a plurality of positioning nut gaskets are horizontally distributed at the same height.

[0016] Further, a plurality of positioning holes are arranged at equal intervals.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) According to the size of the workpiece to be detected, the utility model selects appropriate positioning holes for two-point positioning to fix the reference cylinder of the workpiece to be detected. The floating probe of the lever dial indicator detects the measured cylindrical surface of the workpiece to be detected from the side surface of the workpiece to be detected. When the workpiece to be detected rotates a full circle, the jumping data of the floating probe is obtained, and the actual variation of the coaxiality of the workpiece to be detected can be accurately obtained, avoiding obvious deviation between the detection result of the coaxiality of the workpiece to be detected and the actual coaxiality of the workpiece to be detected.

[0019] (2) The outer cylinder coaxiality detection device of the utility model reduces the cumbersome measurement of coordinate measurement, can avoid the measurement error amplified due to the extension of theoretical data in the case of too short reference bearing shaft, improves the accuracy of detection; at the same time, due to the simplicity of the equipment, the efficiency is also improved, realizing on-line detection, and 100% full inspection of products can be carried out on-line. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the outer cylinder coaxiality detection device of the utility model;

[0021] Figure 2 is a schematic structural diagram of the smooth surface of the detection platform of the utility model;

[0022] Figure 3 is Figure 1 the right view of the platform support base in

[0023] Reference Signs:

[0024] 1 - Platform support base; 2 - Detection platform; 3 - Workpiece to be detected; 31 - Reference cylinder; 32 - Measured cylinder; 4 - First threaded hole; 5 - Lever dial indicator; 51 - Mounting base; 52 - Floating probe; 6 - Positioning nut gasket; 7 - Second threaded hole; 8 - Positioning arc line. Detailed implementation mode

[0025] The technical solution of the present utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of the present utility model.

[0026] It should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "horizontal", "left", "right", "front", "rear", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0027] Combined with Figure 1 、 Figure 2 、 Figure 3 As shown, the present utility model provides an external cylindrical coaxiality detection device, which includes a platform support base 1 and a detection platform 2 inclined and fixed on the platform support base 1.

[0028] The platform support base 1 is enclosed by a back plate, two side plates and a bottom plate, and the side plates are right-angled triangles.

[0029] The included angle between the detection platform 2 and the bottom plate of the platform support base 1 is 30°.

[0030] The detection platform 2 is the main body for carrying the workpiece 3 to be detected. The top surface of the detection platform 2 is a smooth surface, and the top surface of the detection platform 2 serves as the main body in contact with the end face of the workpiece 3 to be detected.

[0031] The workpiece 3 to be detected includes a reference cylinder 31 and a measured cylinder 32. The measured cylinder 32 is an external cylinder. In this embodiment, the workpiece 3 to be detected is a gear shaft.

[0032] A number of first threaded holes 4 are provided on the detection platform 2, and the detection platform 2 and the platform support base 1 are threadedly connected through the first threaded holes 4.

[0033] A magnetic layer is provided on the detection platform 2.

[0034] The external cylindrical coaxiality detection device further includes a movable lever micrometer 5. The lever micrometer 5 is magnetically connected to the detection platform 2. The lever micrometer 5 can move freely on the detection platform 2, and the lever micrometer 5 is used to directly read the coaxiality of the non-reference end of the workpiece 3 to be detected.

[0035] Specifically, the lever dial indicator 5 has a mounting base 51 and a floating probe 52. The lever dial indicator 5 is a prior art device, and specifically, Mitutoyo lever dial indicator 513-471-10E can be used. The structure of the lever dial indicator 5 will not be introduced in detail here. The mounting base 51 is magnetically connected to a specific position on the detection platform 2. This specific position refers to the fixed position of the mounting base 51 when the floating probe 52 is in contact with the surface of the cylindrical object 32 to be measured. The mounting base 51 can move on the detection platform 2. By the magnetic connection between the lever dial indicator 5 and the detection platform 2, the fixing method of the lever dial indicator 5 is simplified, and the test cost is reduced.

[0036] The outer cylindrical coaxiality detection device further includes a positioning nut gasket 6 arranged on the detection platform 2. A number of second threaded holes 7 are equally divided and arranged at the middle position of the detection platform 2. The second threaded holes 7 serve as positioning holes. A number of second threaded holes 7 are arranged in the form of an arc line. This arc line is the positioning arc line 8. The center of the positioning arc line 8 is located on the upper side of the detection platform 2 with a higher elevation. The second threaded holes 7 are used to install the positioning nut gasket 6. The positioning nut gasket 6 serves as a positioning column. The positioning nut gaskets 6 are distributed horizontally at the same height, that is, the top surfaces of the positioning nut gaskets 6 are located on the same inclined plane. The positioning nut gasket 6 is used to radially support the workpiece 3 to be detected.

[0037] When detecting the workpiece 3 to be detected, the workpiece 3 to be detected is located inside the positioning arc line 8, that is, the bottom of the workpiece 3 to be detected is higher than the bottom of the positioning nut gasket 6. The bottom of the workpiece 3 to be detected is magnetically connected to the detection platform 2. The side surface of the reference cylinder 31 of the workpiece 3 to be detected is in contact with at least two of the second threaded holes 7 in the positioning arc line 8. Select two of the second threaded holes 7 in contact with the reference cylinder 31 as the positioning holes for the positioning nut gasket 6, and install the positioning nut gasket 6. Then, the positioning nut gasket 6 is in contact with the side surface of the reference cylinder 31 of the workpiece 3 to be detected, realizing the positioning of the reference cylinder 31 of the workpiece 3 to be detected.

[0038] When replacing the workpiece 3 to be detected with a reference cylinder 31 of a different diameter, only after the reference cylinder 31 of the workpiece 3 to be detected is in contact with the positioning arc line 8, arbitrarily select two of the second threaded holes 7 in contact and install two positioning nut gaskets 6, then it can adapt to the workpiece 3 to be detected with a reference cylinder 31 of different diameters. Therefore, through a simple structural design, the outer cylindrical coaxiality detection device of the present utility model can adapt to workpieces 3 to be detected with a variety of reference cylinders 31 of different diameters.

[0039] Below, the workpiece 3 to be detected is taken as an example of a gear shaft for illustration. The gear shaft includes a reference bearing and a measured bearing. The reference bearing is the reference cylinder 31, and the measured bearing is the measured cylinder 32.

[0040] Working principle:

[0041] Keep the detection platform 2 and the end surface of the gear shaft to be tested clean, and the flatness of the detection platform 2 meets the required flatness;

[0042] Place one end of the gear shaft to be tested flat on the testing platform 2. Keep the side of the reference bearing cylinder of the gear shaft to be tested in full contact with the side of the positioning nut gasket 6. Because the platform support base 1 and the testing platform 2 are tilted, there is no gap between the gear shaft and the positioning nut gasket 6 due to its own weight. According to the diameter of the gear shaft to be tested, select a suitable threaded hole for positioning. Fix the reference bearing cylinder of the gear shaft to be tested by two-point positioning.

[0043] The floating probe 52 of the lever micrometer 5 detects the cylindrical surface of the bearing of the gear shaft to be tested from the side of the gear shaft to be tested; during the detection, the gear shaft to be tested is manually rotated to ensure that the gear shaft to be tested rotates at least one full circle, and the runout data of the floating probe 52 is obtained, so as to accurately obtain the coaxiality change of the gear shaft to be tested.

[0044] The external cylinder coaxiality detection device of the utility model can effectively simulate the actual operating state of the upper and lower bearing circles of the gear shaft when they are in motion. The reference bearing cylinder of the gear shaft to be tested is fixed by two-point positioning. When rotating, the reference bearing cylinder always remains relatively fixed with the positioning nut gasket 6 at two points, driving the other end of the tested bearing cylinder to rotate. By loading the floating probe 52 on the side of the tested bearing cylinder, the actual coaxial data of the tested bearing cylinder relative to the reference bearing cylinder can be effectively and quickly obtained.

[0045] Therefore, by fixing the reference end of the gear shaft and dynamically detecting the measured end, the actual coaxial data of the measured bearing cylinder relative to the reference bearing cylinder can be effectively and quickly obtained; and this device is simple and has high stability, small deviation, and fast and accurate detection.

[0046] The external cylinder coaxiality detection device of the utility model reduces the tedious measurement of three-coordinate detection, can avoid the measurement error amplified by the extension of theoretical data when the axis is too short, and improves the accuracy of detection. At the same time, due to the simplicity of the equipment, the efficiency is also improved, and online detection is realized, and 100% full inspection of the product can be performed online.

[0047] The utility model has a high degree of conformity with the actual application state of the workpiece 3 to be detected. By positioning the reference bearing cylinder at two points, the reference bearing cylinder always remains relatively fixed with the two points when the gear shaft rotates, driving the measured end to rotate to obtain a true result, thus solving the deviation problem of amplified simulation error of instrument detection data.

[0048] The utility model designs a simple device, and the lever micrometer 5 is movable, simple, fast, and highly accurate, and can realize full online inspection.

[0049] The above technical features constitute the best embodiment of the present utility model, which has strong adaptability and the best implementation effect. Non-essential technical features can be increased or decreased according to actual needs to meet the requirements of different situations.

[0050] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present utility model, rather than to limit the protection scope of the present utility model. Any simple modification or equivalent replacement made by those of ordinary skill in the art to the technical solution of the present utility model shall not depart from the essence and scope of the technical solution of the present utility model.

Claims

1. An external cylinder coaxiality detection device, used to detect the coaxiality of a workpiece to be detected, the workpiece to be detected includes a reference cylinder and a cylinder to be detected, the external cylinder coaxiality detection device includes an inclined detection platform, characterized in that: The top surface of the detection platform is a smooth surface, and a plurality of positioning holes are arranged on the top surface of the detection platform. The plurality of positioning holes are arranged in the form of an arc, and positioning columns are provided in at least two of the positioning holes. The side surfaces of the positioning columns are in contact with the side surfaces of the reference cylinders of the workpiece to be detected. A lever micrometer is also magnetically connected to the top surface of the detection platform, and the floating probe in the lever micrometer is in contact with the side surfaces of the cylinders to be detected of the workpiece to be detected.

2. The outer cylinder coaxiality detection device according to claim 1, characterized in that: The bottom of the detection platform is threadedly connected with a platform support base.

3. The outer cylinder coaxiality detection device according to claim 2, characterized in that: The platform support base is formed by a back plate, two side plates and a bottom plate, and the side plates are right-angled triangles; the detection platform is threadedly connected to the two side plates.

4. The outer cylinder coaxiality detection device according to claim 2, characterized in that: The included angle between the detection platform and the bottom plate in the platform support base is 30°.

5. The outer cylinder coaxiality detection device according to any one of claims 1 to 4, characterized in that: A magnetic layer is arranged on the detection platform.

6. The outer cylinder coaxiality detection device according to claim 5, characterized in that: The lever micrometer comprises a mounting seat and a floating probe. The mounting seat is connected to a detection platform through magnetic force; the floating probe contacts the side surface of a cylinder to be measured.

7. The outer cylinder coaxiality detection device according to any one of claims 1 to 4, characterized in that: The positioning hole is a threaded hole, and the positioning column is a positioning nut gasket.

8. The outer cylinder coaxiality detection device according to claim 7, characterized in that: A plurality of positioning nut washers are distributed at equal heights laterally.

9. The outer cylinder coaxiality detection device according to claim 7, characterized in that: A plurality of positioning holes are arranged at equal intervals.

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