Annular workpiece inner diameter detection device

Abstract

The utility model discloses a device for detecting the inner diameter of an annular workpiece, which comprises a base and is characterized in that the base is provided with a lower supporting block which is obliquely distributed, the lower supporting block is internally provided with a dovetail groove which is also obliquely distributed, the dovetail groove is internally connected with a lower sliding block in a sliding manner, and the top end surface of the lower sliding block is provided with a lower measuring rod; the bottom end face of the lower supporting block is in threaded connection with a jackscrew matched with the lower sliding block, the base is further in sliding connection with an upper sliding block, the axis of the upper sliding block coincides with the axis of the lower sliding block, an upper measuring rod is arranged on the top end face of the upper sliding block, and a trigger block is arranged on the bottom end face of the upper sliding block. A supporting frame is arranged on the top of the base, a dial indicator is connected to the supporting frame, and a probe of the dial indicator is matched with the trigger block in position.

Description

Technical Field

[0001] The utility model relates to the field of dimensional accuracy detection of workpieces, in particular to a device for detecting the inner diameter of an annular workpiece. Background Art

[0002] Before any workpiece leaves the factory, it needs to be inspected for dimensional accuracy. If the dimensional accuracy is not up to standard, it cannot leave the factory. For annular workpieces, the outer diameter and inner diameter are both parameters that must be inspected. When inspecting the inner diameter of annular workpieces, operators traditionally use calipers to perform manual inspections. This inspection method is time-consuming and labor-intensive, not only requiring more manpower, but also relatively low inspection efficiency and prone to errors, affecting yield.

[0003] Therefore, a method or device capable of solving the above problems is now needed. Summary of the invention

[0004] The utility model aims to solve the above-mentioned deficiencies in the prior art and proposes a device with simple structure, ingenious design, reasonable layout and the ability to quickly, conveniently and accurately detect the inner diameter size of an annular workpiece.

[0005] The technical solution of the utility model is: a ring workpiece inner diameter detection device, including a base 1, characterized in that: the base 1 is provided with an inclined lower support block 2, the lower support block 2 is provided with a dovetail groove 3 with the same inclined distribution, a lower slider 4 is slidably connected in the dovetail groove 3, a lower measuring rod 5 is provided on the top surface of the lower slider 4, and a top screw 6 matching the lower slider 4 is threadedly connected on the bottom surface of the lower support block 2.

[0006] The base 1 is also slidably connected with an upper slider 7, the axis of which coincides with the axis of the lower slider 4, an upper measuring rod 8 is arranged on the top end surface of the upper slider 7, and a trigger block 9 is arranged on the bottom end surface of the upper slider 7.

[0007] A support frame 10 is provided on the top of the base 1, and a micrometer 11 is connected to the support frame 10. The positions of the probe of the micrometer 11 and the trigger block 9 match each other.

[0008] The base 1 is also rotatably connected to a swing member 12 via a rotating shaft. The swing member 12 is fixedly connected to one end of a handle 13. The free end of the swing member 12 is rotatably connected to one end of a Z-shaped connecting rod 14. The other end of the Z-shaped connecting rod 14 is connected to the bottom end of the upper slider 7 via a support rod 15. The two ends of the support rod 15 are respectively hinged to the Z-shaped connecting rod 14 and the upper slider 7.

[0009] The top ends of the lower measuring rod 5 and the upper measuring rod 8 are both provided with limiting ends 16 , and the outer diameter of the limiting ends 16 is greater than the outer diameter of the lower measuring rod 5 and the upper measuring rod 8 .

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] This type of annular workpiece inner diameter detection device has a simple structure, ingenious design, and reasonable layout. It is designed to address the various problems existing in the traditional manual detection method using calipers and other tools. It uses two measuring rods to support the inner wall of the annular workpiece, one of which is fixed, and the other can move toward the outer circumference of the annular workpiece under the action of a driving mechanism. After being tightened, the annular workpiece is automatically centered. At this time, the two measuring rods must be at the two end points on a certain diameter. At this time, you only need to observe the micrometer to directly determine whether the inner diameter size accuracy of the measured workpiece meets the requirements. The operation process of this inner diameter detection device is simple, and the detection results are reliable and accurate. At the same time, its manufacturing process is simple and the manufacturing cost is low. Therefore, it can be said that it has many advantages and is particularly suitable for promotion and application in this field. Its market prospects are very broad. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of an embodiment of the utility model (angle one).

[0013] Figure 2 It is a schematic structural diagram of an embodiment of the utility model (angle two).

[0014] Figure 3 It is a schematic structural diagram of an embodiment of the utility model (angle three). DETAILED DESCRIPTION

[0015] The specific implementation of the present utility model will be described below in conjunction with the accompanying drawings. Figures 1 to 3 As shown: a ring workpiece inner diameter detection device, including a base 1 as a basis, a lower support block 2 with an inclined distribution is arranged on the base 1, a dovetail groove 3 with the same inclined distribution is opened in the lower support block 2, a lower slider 4 is slidably connected in the dovetail groove 3, a lower measuring rod 5 is arranged on the top surface of the lower slider 4, and a top screw 6 matching the lower slider 4 is threadedly connected on the bottom surface of the lower support block 2.

[0016] The base 1 is also slidably connected with an upper slider 7, the axis of which coincides with the axis of the lower slider 4, an upper measuring rod 8 is arranged on the top end surface of the upper slider 7, and a trigger block 9 is arranged on the bottom end surface of the upper slider 7.

[0017] A support frame 10 is provided on the top of the base 1, and a micrometer 11 is connected to the support frame 10. The positions of the probe of the micrometer 11 and the trigger block 9 match each other.

[0018] The base 1 is also rotatably connected to a swing member 12 via a rotating shaft. The swing member 12 is fixedly connected to one end of a handle 13. The free end of the swing member 12 is rotatably connected to one end of a Z-shaped connecting rod 14. The other end of the Z-shaped connecting rod 14 is connected to the bottom end of the upper slider 7 via a support rod 15. The two ends of the support rod 15 are respectively hinged to the Z-shaped connecting rod 14 and the upper slider 7.

[0019] The top ends of the lower measuring rod 5 and the upper measuring rod 8 are both provided with limiting ends 16 , and the outer diameter of the limiting ends 16 is greater than the outer diameter of the lower measuring rod 5 and the upper measuring rod 8 .

[0020] The working process of the annular workpiece inner diameter detection device of the embodiment of the utility model is as follows: in the initial state, under the action of gravity, the handle 13 naturally droops, and the upper slider 7 is in a low position. At this time, the distance between the lower measuring rod 5 and the upper measuring rod 8 is the shortest. Take an annular workpiece 17 to be detected and put it on the lower measuring rod 5 and the upper measuring rod 8. At this time, the lower measuring rod 5 and the upper measuring rod 8 are both located in the inner circle of the annular workpiece.

[0021] In this state, the handle 13 is lifted up, and the handle 13 drives the swinging member 12 to rotate clockwise. The swinging member 12 pulls the Z-shaped connecting rod 14 to move obliquely upward, and then pulls the support rod 15 to move. The top end of the support rod 15 will push the upper slider 7 to slide upward, so that the upper measuring rod 8 moves in the direction away from the lower measuring rod 5. At this time, the upper measuring rod 8 and the lower measuring rod 5 are supported in the inner circle of the annular workpiece 17. When the upper slider 7 moves, it will drive the trigger block 9 set at its bottom to move. The trigger block 9 contacts the probe at the bottom of the micrometer 11. The staff only needs to observe the micrometer 11 to determine whether the inner diameter size of the currently measured annular workpiece 17 meets the requirements;

[0022] Before the formal test, you need to take a ring-shaped workpiece 17 (calibration piece) that meets the dimensional accuracy requirements, follow the above steps, and adjust the micrometer 11 to zero based on the calibration piece. After zeroing, you can carry out the formal test;

[0023] After the test is completed, the handle 13 is released, the handle 13 naturally droops, and the various mechanisms in the device reversely move, the upper slider 7 falls back to the initial height, and the annular workpiece 17 to be measured is removed from the lower measuring rod 5 and the upper measuring rod 8;

[0024] In the above working process, when the annular workpiece 17 is placed in place, the limit ends 16 at the top of the lower measuring rod 5 and the upper measuring rod 8 are both located above the top surface of the annular workpiece 17. This structure can ensure that the annular workpiece 17 will not fall off the lower measuring rod 5 and the upper measuring rod 8.

[0025] In order to make the device more versatile, the lower slider 4 where the lower measuring rod 5 is located can be adjusted within a certain range. During adjustment, the lower slider 4 is pushed to slide in the dovetail groove 3. After moving into place, the top screw 6 is tightened to lock the lower slider 4 on the lower support block 2.

Claims

1. A device for detecting the inner diameter of an annular workpiece, comprising a base (1), characterized in that: The base (1) is provided with an inclined lower support block (2), the lower support block (2) is provided with a dovetail groove (3) which is also inclined, a lower slider (4) is slidably connected in the dovetail groove (3), a lower measuring rod (5) is provided on the top surface of the lower slider (4), and a top screw (6) matching the lower slider (4) is threadedly connected on the bottom surface of the lower support block (2). The base (1) is also slidably connected to an upper slider (7), the axis of the upper slider (7) coincides with the axis of the lower slider (4), an upper measuring rod (8) is provided on the top end surface of the upper slider (7), and a trigger block (9) is provided on the bottom end surface of the upper slider (7). A support frame (10) is provided on the top of the base (1), a micrometer (11) is connected to the support frame (10), and the positions of the probe of the micrometer (11) and the trigger block (9) match each other. The base (1) is also rotatably connected to a swing member (12) via a rotating shaft. The swing member (12) is fixedly connected to one end of a handle (13). The free end of the swing member (12) is rotatably connected to one end of a Z-shaped connecting rod (14). The other end of the Z-shaped connecting rod (14) is connected to the bottom end of the upper slider (7) via a support rod (15). The two ends of the support rod (15) are respectively hinged to the Z-shaped connecting rod (14) and the upper slider (7). The top ends of the lower measuring rod (5) and the upper measuring rod (8) are both provided with limit ends (16), and the outer diameter of the limit ends (16) is greater than the outer diameters of the lower measuring rod (5) and the upper measuring rod (8).

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