Device for detecting symmetry degree of key groove of inner hole of pipe body

Abstract

The utility model discloses a device for detecting the symmetry degree of a keyway of an inner hole of a pipe body. The device for detecting the symmetry degree of the keyway of the inner hole of the pipe body comprises a detection mechanism, a guide key, a lower locking screw and an upper adjusting bolt, the detection mechanism comprises two semi-arc-shaped plates which are symmetrically arranged, the opposite sides of the two semi-arc-shaped plates are connected with the connecting ends respectively, and a detection part is arranged between the two connecting ends; the outer side surfaces of the semi-arc-shaped plates are arc-shaped surfaces, and the inner side surfaces are inclined surfaces; the top of each semi-arc-shaped plate is provided with a fixed end, and the fixed ends are in threaded fit with upper adjusting bolts. A guide key is embedded in the bottom of the detection part, the guide key and the detection part are fixed through a plurality of lower locking screws, and the bottom of the guide key protrudes out of the bottom of the detection part. Therefore, the detection of the symmetry degree of the pipe body inner hole keyway is convenient.

Description

Technical Field

[0001] The utility model relates to an improvement of a pipe body symmetry detection technology, belongs to the field of symmetry detection, and particularly relates to a pipe body inner hole keyway symmetry detection device. Background Art

[0002] Symmetry means that the specific axis of a part must be within the specified tolerance range and should remain symmetrical relative to the auxiliary plane passing through the reference axis. In mechanical design, many motion and torque transmission components, such as motors, gearboxes, bearings, etc., rely on keyway connections between shafts and holes to transmit power. If the symmetry of these keyway connections does not meet the design requirements, it may lead to assembly difficulties, uneven operation, increased noise, and even damage to mechanical components. For inspection inside the pipe body, traditional measurement methods are limited by the shape of the measuring tool and cannot intuitively measure symmetry, resulting in inconvenient inspection and greatly affecting inspection efficiency.

[0003] The Chinese patent application with application number CN201821672553.1 and application date October 16, 2018 discloses a roller core hole symmetry detection device, wherein through hole I and through hole II are respectively provided at both ends of the roller core; the symmetry detection device includes a fixing rod, a fixing ring and a sleeve, the roller core fixing ring is provided with a claw, a hole III and a hole IV, the spacing between holes III and IV is equal to the inner diameter of the fixing ring, and the angle between the claw and hole III along the circumferential direction is 90°; the sleeve is sleeved on the outside of the roller core, and grooves I and grooves II with perpendicular axes are respectively provided at both ends of the sleeve, groove I is matched with through hole II, and the claw of the fixing ring is inserted into groove II; the fixing rod passes through groove I and through hole II to fix the sleeve. The roller core hole symmetry detection device proposed in this scheme improves the matching accuracy problem during on-site installation, but the above scheme does not solve the problem of inconvenient symmetry detection of the keyway of the inner hole of the tube body.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0005] The purpose of the utility model is to overcome the problem in the prior art of inconvenient detection of the symmetry of the keyway in the inner hole of a pipe body, and to provide a device for detecting the symmetry of the keyway in the inner hole of a pipe body, which is convenient for detecting the symmetry of the keyway in the inner hole of a pipe body.

[0006] To achieve the above objectives, the technical solution of the present invention is: a device for detecting the symmetry of a keyway in a pipe body inner hole, the device comprising a detection mechanism, a guide key, a lower locking screw and an upper adjusting bolt;

[0007] The detection mechanism includes two symmetrically arranged semi-arc plates, the opposite sides of the two semi-arc plates are respectively connected to the connection ends, and a detection part is provided between the two connection ends;

[0008] The outer side surface of the semi-arc plate is an arc surface, and the inner side surface is an inclined surface;

[0009] The top of each semi-arc plate is provided with a fixed end, and the fixed end is threadedly engaged with an upper adjusting bolt;

[0010] A guide key is embedded in the bottom of the detection part, and the guide key is fixed to the detection part by a plurality of lower locking screws, and the bottom of the guide key protrudes from the bottom of the detection part.

[0011] A propulsion end is provided in front of the detection portion, and the front end of the bottom of the propulsion end is connected to the top of the clamping portion;

[0012] The side surface of the clamping portion is connected to the side surface of the guide key.

[0013] The sum of the lengths of the clamping portion and the guide key is the same as the sum of the lengths of the propulsion end and the detection portion.

[0014] The thickness of the clamping portion is smaller than the thickness of the guide key.

[0015] The top of the propulsion end is inclined, and the height of the propulsion end away from the detection portion and the height of the propulsion end close to the detection portion are in a decreasing trend.

[0016] A fixing groove is provided at the bottom of the detection portion, and the guide key is embedded in the fixing groove.

[0017] The top of the guide key is provided with a plurality of evenly distributed threaded holes, and all the lower locking screws are threadably matched with the corresponding threaded holes.

[0018] The fixed end is rectangular, with one end extending to the outside of the semi-arc plate. The top of the fixed end is located on the outside of the semi-arc plate and is provided with a penetrating fixing screw hole. The upper adjusting bolt is threadedly engaged with the fixing screw hole.

[0019] Two symmetrically arranged empty slots are provided on the semi-arc plate.

[0020] The curvature of the curved surface of the semi-arc plate is the same as the curvature of the outer side surface of the connecting end.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. In the utility model, a device for detecting the symmetry of the keyway of a pipe body hole is provided. The opposite sides of two semi-arc plates are respectively connected to the connecting ends, and a detecting portion is provided between the two connecting ends; the outer side surface of the semi-arc plate is an arc surface, and the inner side surface is an inclined surface; the top of each semi-arc plate is provided with a fixed end, and the upper adjusting bolt is matched with the thread on the fixed end; a guide key is embedded in the bottom of the detecting portion, and the guide key and the detecting portion are fixed by a plurality of lower locking screws. The bottom of the guide key protrudes from the bottom of the detecting portion. When in use, the guide key is pushed into the pipe body along the keyway of the pipe body hole and the arc surface of the semi-arc plate is attached to the guide rail under the pipe body hole and stopped at the position to be measured; then the guide key is adjusted left and right. Adjust the position of the arcuate surface of the detection mechanism, insert a feeler gauge of the same thickness into the gap between the arcuate surface of the detection mechanism and the left and right guide rail surfaces, and ensure that the outer circle of the symmetry detection device is concentric with the inner hole surface of the lower guide rail of the pipe body; then slightly adjust the upper adjustment bolt to rotate the detection mechanism to ensure that the left side of the guide key is parallel to the side of the inner hole keyway of the pipe body, and use the feeler gauge to respectively detect the gap values ​​between the left side of the guide key and the left side of the inner hole keyway of the pipe body, and the right side of the guide key and the right side of the inner hole keyway of the pipe body. Use the feeler gauge to respectively detect the gap values ​​between the left and right sides of the guide key and the left and right sides of the inner hole keyway of the pipe body, and the symmetry deviation value can be determined. The measurement is very convenient and is not affected by the pipe body environment and the measuring tool. Therefore, the symmetry detection of the inner hole keyway of the pipe body is convenient.

[0023] 2. In this utility model, a device for detecting the symmetry of a keyway in a pipe bore has a rectangular fixed end, one end of which extends to the outside of a semi-arc plate. A fixing screw hole is provided at the top of the fixed end, located on the outside of the semi-arc plate, and threadedly engages with an upper adjusting bolt. During operation, the detection mechanism rotates by slightly adjusting the upper adjusting bolt to ensure that the side of the guide key is parallel to the side of the keyway in the pipe bore. This simplifies the adjustment process before measurement and improves operational efficiency. Therefore, this utility model is easy to adjust and highly efficient.

[0024] 3. In the present invention, a device for detecting the symmetry of a pipe inner bore keyway only requires measuring the clearance between the left and right sides of the guide key and the left and right sides of the pipe inner bore keyway to obtain the symmetry deviation value. This makes the entire solution applicable to detecting the symmetry of pipe inner bore keyways of various sizes and shapes, and has high versatility. Therefore, the present invention is easy to use and highly versatile. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the present utility model.

[0026] Figure 2 It is a side view of the present utility model.

[0027] Figure 3 It is a structural diagram of the guide key in the utility model.

[0028] Figure 4 It is a side view of the guide key in the utility model.

[0029] Figure 5 It is a detection schematic diagram of the present utility model.

[0030] Figure 6 This utility model Figure 5 side view.

[0031] In the figure: detection mechanism 1, semi-arc plate 11, arc surface 111, inclined surface 112, empty groove 113, connecting end 12, detection part 13, fixed end 14, fixing screw hole 141, fixing groove 15, guide key 2, threaded hole 21, lower locking screw 3, upper adjusting bolt 4, clamping part 5, and pushing end 6. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] See also Figures 1 to 6 A device for detecting the symmetry of a keyway in a pipe body inner hole, comprising a detection mechanism 1, a guide key 2, a lower locking screw 3 and an upper adjusting bolt 4;

[0034] The detection mechanism 1 includes two symmetrically arranged semi-arc plates 11, opposite sides of the two semi-arc plates 11 are respectively connected to connecting ends 12, and a detection portion 13 is provided between the two connecting ends 12;

[0035] The outer side surface of the semi-arc plate 11 is an arc surface 111, and the inner side surface is an inclined surface 112;

[0036] The top of each semi-arc plate 11 is provided with a fixed end 14, and the fixed end 14 is threadedly engaged with an upper adjusting bolt 4;

[0037] A guide key 2 is embedded in the bottom of the detection portion 13 . The guide key 2 is fixed to the detection portion 13 via a plurality of lower locking screws 3 . The bottom of the guide key 2 protrudes from the bottom of the detection portion 13 .

[0038] A propulsion end 6 is provided in front of the detection portion 13, and the bottom front end of the propulsion end 6 is connected to the top of the clamping portion 5;

[0039] The side surface of the clamping portion 5 is connected to the side surface of the guide key 2 .

[0040] The sum of the lengths of the clamping portion 5 and the guide key 2 is the same as the sum of the lengths of the propulsion end 6 and the detection portion 13 .

[0041] The thickness of the clamping portion 5 is smaller than the thickness of the guide key 2 .

[0042] The top of the propulsion end 6 is inclined, and the height of the propulsion end 6 away from the detection portion 13 and the height of the propulsion end 6 close to the detection portion 13 are in a decreasing trend.

[0043] A fixing groove 15 is defined at the bottom of the detection portion 13 , and the guide key 2 is embedded in the fixing groove 15 .

[0044] The top of the guide key 2 is provided with a plurality of evenly distributed threaded holes 21 , and all the lower locking screws 3 are threadably engaged with the corresponding threaded holes 21 .

[0045] The fixing end 14 is rectangular, with one end extending to the outside of the semi-arc plate 11 . The top of the fixing end 14 is located outside the semi-arc plate 11 and is provided with a penetrating fixing screw hole 141 . The upper adjusting bolt 4 is threadedly engaged with the fixing screw hole 141 .

[0046] Two symmetrically arranged slots 113 are defined on the semi-arc plate 11 .

[0047] The curvature of the arc surface 111 of the semi-arc plate 11 is the same as the curvature of the outer side surface of the connecting end 12 .

[0048] The supplementary description of this utility model is as follows:

[0049] By using the guide key to push the pipe body along the keyway of the inner hole of the pipe body and the outer arc surface of the detection mechanism, and stop at the position to be measured, the accuracy of the measurement position is ensured.

[0050] Example 1:

[0051] A device for detecting the symmetry of a keyway in a pipe body hole, the device comprising a detection mechanism 1, a guide key 2, a lower locking screw 3 and an upper adjusting bolt 4; the detection mechanism 1 comprises two symmetrically arranged semi-arc plates 11, the opposite sides of the two semi-arc plates 11 are respectively connected to connecting ends 12, and a detection portion 13 is provided between the two connecting ends 12; the outer side surface of the semi-arc plates 11 is an arc surface 111, and the inner side surface is an inclined surface 112; the top of each semi-arc plate 11 is provided with a fixed end 14, and the fixed end 14 is threadedly engaged with an upper adjusting bolt 4; the bottom of the detection portion 13 is embedded with a guide key 2, and the guide key 2 and the detection portion 13 are fixed by multiple lower locking screws 3, and the bottom of the guide key 2 protrudes from the bottom of the detection portion 13.

[0052] When in use: screw the upper adjusting bolts 4 into the fixed ends 14 of the detection mechanism 1 respectively, initially ensure that the protruding heights of the two upper adjusting bolts 4 are consistent, install the guide key 2 into the detection part 13, and fasten the guide key 2 and the detection mechanism 1 with the lower locking screw 3, and align the extended end of the guide key 2 of the symmetry detection device with the key groove 72 of the inner hole of the tube body. The guide key 2 is pushed into the tube body 7 along the key groove 2 of the inner hole of the tube body and the curved surface 111 of the semi-arc plate 11, and is attached to the lower guide rail 71 of the inner hole of the tube body and stopped at the position to be measured; then adjust the position of the curved surface 111 of the detection mechanism 1 left and right. Place the symmetry detection device 1 in the center of the hole 111 and insert a feeler gauge 74 of the same thickness into the gap between the arc surface 111 of the detection mechanism 1 and the left and right guide rail surfaces to ensure that the outer circle of the symmetry detection device is concentric with the inner hole surface of the lower guide rail 71 of the tube body 7; then slightly adjust the upper adjusting bolt 4 to rotate the detection mechanism 1 to ensure that the left side surface 22 of the guide key is parallel to the side surface of the inner hole keyway 72 of the tube body, and use the feeler gauge 74 to respectively detect the gap values ​​between the left side surface 22 of the guide key and the left side surface of the inner hole keyway of the tube body, and the right side surface 23 of the guide key and the right side surface of the inner hole keyway of the tube body. The absolute value of the difference between the two gap values ​​can be used to measure the symmetry deviation value.

[0053] Example 2:

[0054] Example 2 is basically the same as Example 1, except that:

[0055] A propulsion end 6 is provided in front of the detection part 13, and the bottom front end of the propulsion end 6 is connected to the top of the clamping part 5; the side of the clamping part 5 is connected to the side of the guide key 2; the sum of the lengths of the clamping part 5 and the guide key 2 is the same as the sum of the lengths of the propulsion end 6 and the detection part 13; the thickness of the clamping part 5 is less than the thickness of the guide key 2; the top of the propulsion end 6 is inclined, and the height of the propulsion end 6 away from the detection part 13 and the height close to the detection part 13 show a decreasing trend; the bottom of the detection part 13 is provided with a fixing groove 15, and the guide key 2 is embedded in the fixing groove 15; the top of the guide key 2 is provided with a plurality of evenly distributed threaded holes 21, and all the lower locking screws 3 are threadedly engaged with the corresponding threaded holes 21 respectively.

[0056] During application: install the guide key 2 into the fixing groove 15, and use the lower locking screw 3 to pass through the threaded hole 21 to fix the guide key 2 to the detection mechanism 1, and push the propulsion end 6 so that the protruding end of the guide key 2 is facing the key groove 72 of the inner hole of the tube body and enters into the key groove 72 of the inner hole of the tube body.

[0057] Example 3:

[0058] Example 3 is basically the same as Example 1, except that:

[0059] The fixed end 14 is rectangular, with one end extending to the outside of the semi-arc plate 11. The top of the fixed end 14 is located on the outside of the semi-arc plate 11 and is provided with a penetrating fixing screw hole 141. The upper adjusting bolt 4 is threadedly engaged with the fixing screw hole 141; two symmetrically arranged empty slots 113 are provided on the semi-arc plate 11; the curvature of the curved surface 111 of the semi-arc plate 11 is the same as the curvature of the outer side surface of the connecting end 12.

[0060] During application: screw the upper adjusting bolts 4 into the fixing screw holes 141 of the fixed end 14 respectively, so that the protruding heights of the two upper adjusting bolts 4 are consistent, and then slightly adjust the upper adjusting bolts 4 upward so that the detection mechanism 1 can rotate, ensuring that the left side 22 of the guide key is parallel to the side of the keyway 72 of the inner hole of the tube body.

[0061] The above description is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the content disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A device for detecting the symmetry of a keyway in a pipe inner hole, characterized by: The device for detecting the symmetry of the keyway in the inner hole of the pipe body comprises a detection mechanism (1), a guide key (2), a lower locking screw (3) and an upper adjusting bolt (4); The detection mechanism (1) comprises two symmetrically arranged semi-arc plates (11), opposite sides of the two semi-arc plates (11) are respectively connected to connecting ends (12), and a detection portion (13) is provided between the two connecting ends (12); The outer side surface of the semi-arc plate (11) is an arc surface (111), and the inner side surface is an inclined surface (112); The top of each semi-arc plate (11) is provided with a fixed end (14), and the upper adjusting bolt (4) is threadedly engaged with the fixed end (14); A guide key (2) is embedded in the bottom of the detection part (13), and the guide key (2) and the detection part (13) are fixed by a plurality of lower locking screws (3), and the bottom of the guide key (2) protrudes from the bottom of the detection part (13).

2. The device for detecting the symmetry of the keyway in the inner hole of a pipe according to claim 1, characterized in that: A propulsion end (6) is provided in front of the detection portion (13), and the front end of the bottom of the propulsion end (6) is connected to the top of the clamping portion (5); The side surface of the clamping portion (5) is connected to the side surface of the guide key (2).

3. The device for detecting the symmetry of the keyway in the inner hole of a pipe according to claim 2, characterized in that: The sum of the lengths of the clamping portion (5) and the guide key (2) is the same as the sum of the lengths of the propulsion end (6) and the detection portion (13).

4. The device for detecting the symmetry of the keyway in the inner hole of a pipe according to claim 3, characterized in that: The thickness of the clamping portion (5) is smaller than the thickness of the guide key (2).

5. The device for detecting the symmetry of the keyway in the inner hole of a pipe according to claim 2, characterized in that: The top of the propulsion end (6) is arranged to be inclined, and the height of the propulsion end (6) away from the detection portion (13) and the height of the propulsion end (6) close to the detection portion (13) show a decreasing trend.

6. The device for detecting the symmetry of the keyway in the inner hole of a pipe according to claim 1, characterized in that: A fixing groove (15) is provided at the bottom of the detection portion (13), and the guide key (2) is embedded in the fixing groove (15).

7. The device for detecting the symmetry of the keyway in the inner hole of a pipe according to claim 6, characterized in that: The top of the guide key (2) is provided with a plurality of evenly distributed threaded holes (21), and all the lower locking screws (3) are threadably engaged with the corresponding threaded holes (21).

8. The device for detecting the symmetry of the keyway in the inner hole of a pipe according to claim 1, characterized in that: The fixed end (14) is rectangular, with one end extending to the outside of the semi-arc plate (11). The top of the fixed end (14) is located outside the semi-arc plate (11) and is provided with a penetrating fixing screw hole (141). The upper adjusting bolt (4) is threadedly engaged with the fixing screw hole (141).

9. The device for detecting the symmetry of the keyway in the inner hole of a pipe according to claim 8, characterized in that: Two symmetrically arranged slots (113) are formed on the semi-arc plate (11).

10. The device for detecting symmetry of key grooves in inner holes of a pipe according to claim 9, characterized in that: The curvature of the curved surface (111) of the semi-arc plate (11) is the same as the curvature of the outer side surface of the connecting end (12).

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