Workpiece concentricity measuring tool

Abstract

The workpiece concentricity measuring tool comprises a measuring device and a rotating device, the rotating device comprises a rotating base and a tool shaft, a rotating channel is formed in the rotating base, and an upper bearing groove and a lower bearing groove which are distributed up and down are formed in the rotating channel; the tool shaft comprises a rotating shaft section and a station shaft, and the rotating shaft section is located in the rotating channel; the station shaft comprises at least three cylinder sections which are sequentially connected from bottom to top, and the lowermost cylinder section is connected to the top of the rotating shaft section; and in the two vertically adjacent cylinder sections, the diameter of the upper cylinder section is smaller than that of the lower cylinder section, and the peripheral surface of the upper cylinder section and the top surface of the lower cylinder section form a detection station. According to the utility model, workpieces of different types and sizes can be installed on the station shaft for concentricity detection, the compatibility of the tool is effectively improved, and the detection cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece concentricity measuring devices, in particular to a workpiece concentricity measuring tool. Background Art

[0002] When manufacturing water pumps, many circular workpieces with center holes are used, such as impellers, pump covers, etc. These workpieces need to be tested for concentricity before being assembled into water pumps to ensure the production quality of water pumps. In the prior art, the detection device is usually only equipped with a detection station suitable for a single specification of product, and the compatibility is relatively poor; when testing products of different types and sizes, it is necessary to replace the special machine detection device that is compatible with its specifications, resulting in high detection costs. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a workpiece concentricity measuring tool.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A workpiece concentricity measuring tool, comprising a measuring device and a rotating device; the measuring device comprises a measuring table for measuring concentricity and a measuring bracket for mounting the measuring table and capable of adjusting the position of the measuring table; the characteristic is that the rotating device comprises a rotating base and a tool shaft, the rotating base is provided with a rotating channel, and the rotating channel is provided with an upper bearing groove and a lower bearing groove arranged in an upper and lower distribution;

[0006] The tooling shaft comprises a rotating shaft section and a workstation shaft, wherein the rotating shaft section is located in the rotating channel, and the rotating shaft section is sleeved with a first bearing installed in an upper bearing groove and a second bearing installed in a lower bearing groove;

[0007] The workstation axis includes at least three cylindrical segments connected in sequence from bottom to top, the lowest cylindrical segment is connected to the top of the rotating shaft segment, and the rotating shaft segment and the cylindrical segment are located on the same axis; among the two cylindrical segments adjacent to each other, the diameter of the upper cylindrical segment is smaller than the diameter of the lower cylindrical segment, and the outer peripheral surface of the upper cylindrical segment and the top surface of the lower cylindrical segment form an inspection station.

[0008] In the utility model, an upper supporting convex ring supporting the bottom of the outer ring of the first bearing is provided in the upper bearing groove, and the rotating device also includes an upper limit cover plate corresponding to the upper bearing groove, and the upper limit cover plate is installed on the top of the rotating base, and an upper rotating through hole for the tooling shaft to pass through is provided on the upper limit cover plate, and an upper limit convex ring is protruded from the bottom of the upper limit cover plate, and the upper limit convex ring enters into the upper bearing groove from the opening of the upper bearing groove and rests on the top of the outer ring of the first bearing.

[0009] In the utility model, the top of the first bearing inner ring abuts against the bottom of the cylindrical section located at the bottom, and the bottom is limited by a first retaining spring sleeved on the rotating shaft section.

[0010] In the utility model, a lower matching convex ring is provided in the lower bearing groove, which abuts against the top of the outer ring of the second bearing. The rotating device also includes a lower limit cover plate corresponding to the lower bearing groove. The lower limit cover plate is installed on the rotating base. A lower rotating through hole is provided under the lower limit cover plate for the rotating shaft section to pass through. A lower limit convex ring is protruded from the top of the lower limit cover plate. The lower limit convex ring enters into the lower bearing groove from the opening of the lower bearing groove and abuts against the bottom of the outer ring of the second bearing.

[0011] In the utility model, a second retaining spring is sleeved on the rotating shaft section and abuts against the top of the inner ring of the second bearing.

[0012] In the utility model, the bottom of the rotating base is a mounting base, and a connecting through hole is provided on the outer periphery of the mounting base. The screw section of the connecting bolt passes through the connecting through hole and is threadedly matched with the connecting screw hole on the measuring base.

[0013] In the utility model, the measuring base is made of iron material, and the measuring bracket adopts a magnetic table base.

[0014] In the utility model, a turntable hand wheel is mounted on the cylindrical section located at the bottom.

[0015] In the utility model, a driven bevel gear located between the first bearing and the second bearing is mounted on the rotating shaft section, a driving shaft is rotatably mounted on the side of the rotating base through a rotating bearing, an active bevel gear meshing with the driven bevel gear in the rotating channel is fixedly mounted on one end of the driving shaft, and a driving handwheel located outside the rotating base is fixedly mounted on the other end.

[0016] Beneficial effects of the utility model: The utility model has a workstation shaft including at least three cylindrical segments, so that a plurality of inspection stations can be formed on the workstation shaft, so that workpieces of different types and sizes can be installed on the workstation shaft for concentricity inspection, effectively improving the compatibility of tooling and reducing the inspection cost. In addition, the tooling shaft of the rotating device drives the workpiece to rotate, improving the smoothness of the workpiece rotation and reducing the difficulty of workers rotating the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0018] Figure 1 It is a structural schematic diagram of Example 1;

[0019] Figure 2 is a schematic structural diagram of the rotating device in Example 1;

[0020] Figure 3 It is a schematic diagram of the structure of the rotating base in Example 1;

[0021] Figure 4 This is a schematic diagram of the assembly of the tooling shaft, the first bearing and the second bearing in Example 1;

[0022] Figure 5 It is a structural schematic diagram of Example 2;

[0023] Figure 6 This is a schematic diagram of the structure of Example 3. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Example 1

[0025] Reference Figure 1-4 The workpiece concentricity measuring tool comprises a measuring base 1, a measuring device for detecting the concentricity of a workpiece 100, and a rotating device for driving the workpiece 100 to rotate, wherein the measuring device and the rotating device are both mounted on the measuring base 1; the measuring device comprises a measuring gauge 2 for measuring concentricity, a measuring bracket 3 for mounting the measuring gauge 2 and capable of adjusting the position of the measuring gauge 2, the measuring bracket 3 is mounted on the measuring base 1, and the measuring gauge 2 is a dial gauge or a micrometer;

[0026] Furthermore, the rotating device includes a rotating base 4 and a tooling shaft 5. The rotating base 4 is provided with a rotating channel 41. The rotating channel 41 penetrates the top and bottom of the rotating base 4. The rotating channel 41 is provided with an upper bearing groove 42 and a lower bearing groove 43 which are arranged in an upper and lower distribution.

[0027] The tooling shaft 5 includes a rotating shaft section 51 and a workstation shaft. The rotating shaft section 51 is located in the rotating channel 41. A first bearing 6 installed in the upper bearing groove 42 and a second bearing 7 installed in the lower bearing groove 43 are mounted on the rotating shaft section 51. The inner ring wall surface of the first bearing 6 and the inner ring wall surface of the second bearing 7 are both in contact with the outer peripheral surface of the rotating shaft section 51. The outer ring wall surface of the first bearing 6 is in contact with the groove wall of the upper bearing groove 42. The outer ring wall surface of the second bearing 7 is in contact with the groove wall of the lower bearing groove 43. The first bearing 6 and the second bearing 7 can make the tooling shaft 5 rotate smoothly on the rotating base 4, reducing the difficulty of workers rotating the workpiece 100.

[0028] Furthermore, the workstation axis includes at least three cylindrical segments 52 integrally formed and connected in sequence from bottom to top, the cylindrical segment 52 located at the bottom is integrally connected to the top of the rotating shaft segment 51, and the rotating shaft segment 51 and the cylindrical segment 52 are located on the same axis; of the two cylindrical segments 52 adjacent to each other, the diameter of the upper cylindrical segment 52 is smaller than the diameter of the lower cylindrical segment 52, and the outer circumferential surface of the upper cylindrical segment 52 and the top surface of the lower cylindrical segment 52 form an inspection station 60, wherein the outer circumferential surface of the upper cylindrical segment 52 contacts and cooperates with the wall of the center hole of the workpiece 100, so that the workpiece 100 and the tooling axis 5 are located on the same axis, so that the workstation axis can drive the workpiece 100 to rotate coaxially; the top surface of the lower cylindrical segment 52 is used to support the workpiece 100 to prevent the workpiece 100 from sliding down to the next inspection station 60. Since the workstation shaft includes at least three cylindrical segments 52, at least two inspection stations 60 can be formed on the workstation shaft, so that workpieces of different types and sizes can be installed on the workstation shaft for concentricity inspection, effectively improving the compatibility of the tooling and reducing the inspection cost.

[0029] During measurement, the staff first installs the workpiece 100 in one of the inspection stations 60, and then uses the measuring bracket 3 to adjust the position of the measuring gauge 2 so that the pointer of the measuring gauge 2 is pressed against the outer circumference of the workpiece 100 and a reading appears on the measuring gauge 2. Then, the workpiece 100 is slowly rotated by the rotating device, and the real-time numerical change range of the measuring gauge 2 is observed at the same time. If the real-time numerical change range exceeds the allowable numerical change range, the concentricity test of the workpiece 100 fails; if the real-time numerical change range does not exceed the allowable numerical change range, the concentricity test of the workpiece 100 passes, thereby realizing the concentricity test of the workpiece 100.

[0030] As a preferred embodiment, an upper supporting convex ring 421 supporting the bottom of the outer ring of the first bearing 6 is provided in the upper bearing groove 42, and the rotating device also includes an upper limit cover plate 8 corresponding to the upper bearing groove 42, and the upper limit cover plate 8 is installed on the top of the rotating base 4 by bolt connection, and an upper rotating through hole for the tooling shaft 5 to pass through is provided on the upper limit cover plate 8, and an upper limit convex ring 81 is raised on the bottom of the upper limit cover plate 8, and the opening of the upper bearing groove 42 is opened at the top of the rotating base 4, and the upper limit convex ring 81 enters into the upper bearing groove 42 from the opening of the upper bearing groove 42 and abuts against the top of the outer ring of the first bearing 6, thereby achieving the purpose of fixing the first bearing 6 on the rotating base 4.

[0031] As a preferred embodiment, a lower matching convex ring 431 is provided in the lower bearing groove 43 to abut against the top of the outer ring of the second bearing 7, and the rotating device also includes a lower limit cover plate 9 corresponding to the lower bearing groove 43, and the lower limit cover plate 9 is installed on the rotating base 4 by bolt connection. A lower rotation through hole is provided under the lower limit cover plate 9 for the rotating shaft section 51 to pass through, and a lower limit convex ring 91 is protruded on the top of the lower limit cover plate 9. The lower limit convex ring 91 enters the lower bearing groove 43 from the opening of the lower bearing groove 43 and abuts against the bottom of the outer ring of the second bearing 7, thereby achieving the purpose of fixing the second bearing 7 on the rotating base 4. Further, the diameter of the lower rotation through hole is larger than the diameter of the rotating shaft section 51, so as to avoid the lower limit cover plate 9 interfering with the rotating shaft section 51.

[0032] As a preferred embodiment, the top of the inner ring of the first bearing 6 abuts against the bottom of the cylindrical section 52 located at the bottom, and the bottom is limited by the first retaining spring 10 sleeved on the rotating shaft section 51; the rotating shaft section 51 is sleeved with a second retaining spring 20 abutting against the top of the inner ring of the second bearing 7. The above structure allows the first bearing 6 and the second bearing 7 to be positioned and installed on the rotating shaft section 51, ensuring the quality of the first bearing 6 and the second bearing 7 cooperating with the workstation shaft to rotate.

[0033] As a preferred embodiment, the bottom of the rotating base 4 is a mounting base 44, and a connecting through hole 441 is provided on the outer periphery of the mounting base 44. The screw section of the connecting bolt passes through the connecting through hole 441 and is threadedly engaged with the connecting screw hole on the measuring base 1, thereby locking the mounting base 44 on the measuring base 1.

[0034] As a preferred embodiment, the measuring base 1 is made of iron, and the measuring bracket 3 adopts a magnetic meter base, which includes a magnetic base 31, a handle 32 located on the magnetic base 31 and rotatable to control the magnetization and demagnetization of the magnetic base 31, and a universal support arm 33 arranged on the top of the magnetic base 31, and the measuring meter 2 is installed on the universal support arm 33; during installation, the magnetic base 31 is placed on the measuring base 1, and then the handle 32 is rotated to make the bottom of the magnetic base 31 have a strong magnetism, so that it is firmly adsorbed on the measuring base 1; similarly, the handle 32 can be rotated to demagnetize the magnetic base 31, so that the measuring bracket 3 can be moved on the measuring base 1 to adjust the position. Example 2

[0035] Reference Figure 5 The structure of this embodiment is basically the same as that of Embodiment 1, except that a turntable handwheel 200 is mounted on the cylindrical section 52 at the bottom, and the turntable handwheel 200 is used to help the staff rotate the tooling shaft 5, thereby improving the convenience of the staff rotating the tooling shaft 5. Example 3

[0036] Reference Figure 6The structure of this embodiment is basically the same as that of the embodiment 1, except that: the rotating shaft section 51 is provided with a driven bevel gear 300 located between the first bearing 6 and the second bearing 7, and a driving shaft 400 is rotatably installed on the side of the rotating base 4 through a rotating bearing, and one end of the driving shaft 400 is fixedly provided with an active bevel gear 500 meshing with the driven bevel gear 300 in the rotating channel 41, and the other end is fixedly provided with a driving handwheel 600 located outside the rotating base 4, and the driving handwheel 600 is used to rotate the driving shaft 400 for the staff, and when the driving shaft 400 rotates, the active bevel gear 500 and the driven bevel gear 300 are transmitted to realize the rotation of the tooling shaft 5, thereby improving the convenience of the staff in rotating the tooling shaft 5; and because the driving handwheel 600 is located outside the side of the rotating base 4 and away from the cylindrical section 52, the probability of the staff interfering with the workpiece 100 when operating the driving handwheel 600 can be reduced, thereby ensuring the stable implementation of the concentricity measurement of the workpiece 100.

[0037] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the protection scope of the present invention.

Claims

1. A workpiece concentricity measuring tool, comprising a measuring device and a rotating device; the measuring device comprises a measuring gauge (2) for measuring concentricity, and a measuring bracket (3) for mounting the measuring gauge (2) and capable of adjusting the position of the measuring gauge (2); characterized in that: The rotating device comprises a rotating base (4) and a tooling shaft (5); the rotating base (4) is provided with a rotating channel (41); the rotating channel (41) is provided with an upper bearing groove (42) and a lower bearing groove (43) which are arranged in an upper and lower manner; The tooling shaft (5) comprises a rotating shaft section (51) and a workstation shaft, the rotating shaft section (51) being located in the rotating channel (41), and the rotating shaft section (51) being sleeved with a first bearing (6) installed in an upper bearing groove (42) and a second bearing (7) installed in a lower bearing groove (43); The workstation shaft comprises at least three cylindrical segments (52) connected in sequence from bottom to top, the cylindrical segment (52) located at the bottom is connected to the top of the rotating shaft segment (51), and the rotating shaft segment (51) and the cylindrical segment (52) are located on the same axis; of the two cylindrical segments (52) adjacent to each other, the diameter of the cylindrical segment (52) located at the top is smaller than the diameter of the cylindrical segment (52) located at the bottom, and the outer peripheral surface of the cylindrical segment (52) located at the top and the top surface of the cylindrical segment (52) located at the bottom form an inspection workstation (60).

2. The workpiece concentricity measuring tool according to claim 1, characterized in that: An upper supporting convex ring (421) for supporting the bottom of the outer ring of the first bearing (6) is provided in the upper bearing groove (42). The rotating device also includes an upper limit cover plate (8) corresponding to the upper bearing groove (42). The upper limit cover plate (8) is mounted on the top of the rotating base (4). An upper rotating through hole for the tooling shaft (5) to pass through is provided on the upper limit cover plate (8). An upper limit convex ring (81) is protruded from the bottom of the upper limit cover plate (8). The upper limit convex ring (81) enters the upper bearing groove (42) from the opening of the upper bearing groove (42) and abuts against the top of the outer ring of the first bearing (6).

3. The workpiece concentricity measuring tool according to claim 2, characterized in that: The top of the inner ring of the first bearing (6) abuts against the bottom of the cylindrical section (52) located at the bottom, and the bottom is limited by a first retaining spring (10) sleeved on the rotating shaft section (51).

4. The workpiece concentricity measuring tool according to claim 1, characterized in that: A lower matching convex ring (431) is provided in the lower bearing groove (43) and abuts against the top of the outer ring of the second bearing (7). The rotating device also includes a lower limit cover plate (9) corresponding to the lower bearing groove (43). The lower limit cover plate (9) is installed on the rotating base (4). A lower rotating through hole is provided under the lower limit cover plate (9) for the rotating shaft section (51) to pass through. A lower limit convex ring (91) is protruded from the top of the lower limit cover plate (9). The lower limit convex ring (91) enters the lower bearing groove (43) from the opening of the lower bearing groove (43) and abuts against the bottom of the outer ring of the second bearing (7).

5. The workpiece concentricity measuring tool according to claim 4, characterized in that: The rotating shaft section (51) is sleeved with a second retaining spring (20) which abuts against the top of the inner ring of the second bearing (7).

6. The workpiece concentricity measuring tool according to claim 1, characterized in that: The bottom of the rotating base (4) is a mounting base (44), and a connecting through hole (441) is provided on the outer periphery of the mounting base (44). The screw rod section of the connecting bolt passes through the connecting through hole (441) and is threadedly engaged with the connecting screw hole on the measuring base (1).

7. The workpiece concentricity measuring tool according to claim 6, characterized in that: The measuring base (1) is made of iron material, and the measuring bracket (3) is made of a magnetic base.

8. The workpiece concentricity measuring tool according to any one of claims 1 to 6, characterized in that: A turntable hand wheel (200) is mounted on the bottom cylindrical section (52).

9. The workpiece concentricity measuring tool according to any one of claims 1 to 6, characterized in that: The rotating shaft section (51) is sleeved with a driven bevel gear (300) located between a first bearing (6) and a second bearing (7); a driving shaft (400) is rotatably mounted on a side surface of the rotating base (4) via a rotating bearing; a driving bevel gear (500) meshing with the driven bevel gear (300) in the rotating channel (41) is fixedly mounted on one end of the driving shaft (400); and a driving hand wheel (600) located outside the rotating base (4) is fixedly mounted on the other end.

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