Concentricity measuring instrument

Abstract

The utility model discloses a concentricity measuring instrument, which relates to the technical field of concentricity measuring instruments and comprises a working table, a limiting plate is fixedly connected onto the working table, a left adjusting plate is slidably connected onto the limiting plate, a left clamping column is rotatably connected onto the side surface of the left adjusting plate, and a left convex pattern block is fixedly connected onto the periphery of the left clamping column. A left adjusting plate is slidably connected to the left adjusting plate, a right adjusting plate is slidably connected to the limiting plate, a right clamping column is rotatably connected to the side face of the right adjusting plate, and a right convex pattern block is fixedly connected to the periphery of the right clamping column. A workpiece clamped by the left clamping column and the right clamping column can be finely adjusted through the arrangement of the left adjusting plate, the sliding column, the left clamping column, the left convex pattern block, the right clamping column and the right convex pattern block; and by arranging a left convex pattern block and a right convex pattern block, the friction force between the workpieces can be increased when the left clamping column and the right clamping column clamp the workpieces, the clamping effect is further improved, and the phenomenon that the workpieces are accidentally disengaged in the rotating process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of concentricity measuring instruments, and more specifically, to concentricity measuring instruments. Background Technology

[0002] The concentricity measuring instrument is used for aligning the two shafts of various rotating equipment such as centrifugal pumps, compressors, fans, and generators (also known as wheel alignment). It is widely used in industries such as petrochemicals, power generation, papermaking, textiles, and machinery. It features a reasonable structure, high precision, small error, wide applicability, and convenient use and maintenance, making it an ideal specialized measuring tool.

[0003] Chinese Patent Publication No. CN206330543U discloses a concentricity measuring instrument. Its key technical features include: a lower plate with feet installed at its four bottom corners, connected to the bottom of the lower plate by screws; support columns fixedly connected to the top of the lower plate at its four top corners by screws; an upper plate mounted on the top of the support columns, with its four bottom corners fixedly connected to the tops of four sets of support columns by screws; and external electrical probe sensor mounting brackets fixedly mounted on the left and right ends of the top of the upper plate. This concentricity measuring instrument uses the inner diameter for positioning and measures the coaxiality of the outer diameter relative to the inner diameter. High-precision electrical probe sensors are installed both inside and outside the instrument, resulting in accurate, reliable, and highly repeatable measurements. Operation is convenient and quick; when changing machine types or workpieces, only the positioning shaft needs to be replaced, and all other parts remain unchanged, facilitating operation and reducing measurement errors caused by changing machine types.

[0004] The above solution solves the problem of positioning workpieces of different diameters by replacing the positioning shaft. However, when rotating the positioning shaft for measurement, the positioning shaft is not clamped and fixed, which causes it to fall off during the rotation process. Therefore, a new solution is needed to solve this problem. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a concentricity measuring instrument.

[0006] A concentricity measuring instrument includes a worktable with a limiting plate fixedly connected to it. A left adjusting plate is slidably connected to the limiting plate, and a left clamping column is rotatably connected to the side of the left adjusting plate. A left convex block is fixedly connected to the outer periphery of the left clamping column. A right adjusting plate is slidably connected to the limiting plate, and a right clamping column is rotatably connected to the side of the right adjusting plate. A right convex block is fixedly connected to the outer periphery of the right clamping column. A protective cover is fixedly connected between the left and right adjusting plates, and the bottom of the protective cover is in contact with the limiting plate.

[0007] By adopting the above technical solution, the left clamping column and the right clamping column can clamp and fix the workpiece, and the setting of the left convex block on the left clamping column and the right convex block on the right clamping column can further enhance the clamping effect of the workpiece during the process of fixing the workpiece by the left clamping column and the right clamping column.

[0008] The present invention is further configured such that: multiple sets of adjustment holes are provided inside the limiting plate, and a measuring instrument body is provided on the side of the limiting plate, and the measuring instrument body is hinged to the worktable.

[0009] By adopting the above technical solution, the hinged design of the measuring instrument body is designed to allow the measuring instrument body to adapt to different workpieces of different sizes, and the adjustment holes on the limit plate are for easy adjustment and fixing of the right adjustment plate later.

[0010] The present invention is further configured as follows: a fixed plate is fixedly connected to one side of the limiting plate, the fixed plate is fixedly connected to the worktable, a sliding hole is opened inside the fixed plate, a sliding column is slidably connected in the sliding hole, a handle is fixedly connected to the end of the sliding column near the fixed plate, the end of the sliding column away from the handle is fixedly connected to the left adjusting plate, a sliding groove is opened at the bottom of the left adjusting plate, the left adjusting plate is slidably connected to the limiting plate through the sliding groove, a spring is fixedly connected to the side of the left adjusting plate near the fixed plate, the end of the spring away from the left adjusting plate is fixedly connected to the fixed plate, a damping rod is provided inside the spring, a left limiting groove is fixedly connected to the side of the left adjusting plate away from the fixed plate, the inside of the left limiting groove is rotatably connected to the left clamping column, and the left convex block provided on the outer periphery of the left clamping column is provided with cross convex patterns.

[0011] By adopting the above technical solution, the spring, damping rod, left adjusting plate, sliding column and handle are designed to pull the left adjusting plate to fine-tune the workpiece clamped between the left clamping column and the right clamping column, so that the clamped workpiece is more stably fixed.

[0012] The present invention is further configured such that: a belt is fixedly connected to the side of the right adjusting plate near the right convex block, the inside of the belt is rotatably connected to the right clamping column, a rotating column is rotatably connected to the side of the right adjusting plate away from the right convex block, a crank is fixedly connected to the end of the rotating column away from the right adjusting plate, a belt is drivenly connected to the rotating column, the right clamping column and the rotating column are drivenly connected by the belt, a snap-fit ​​hole is opened on the side of the right adjusting plate, the snap-fit ​​hole has the same diameter as the adjusting hole, and a snap-fit ​​column is detachably connected to the adjusting hole and the snap-fit ​​hole.

[0013] By adopting the above technical solution, the right clamping column, belt, rotating column, crank handle and locking column are configured to rotate the workpiece clamped between the left clamping column and the right clamping column, making it convenient for the measuring instrument body to measure the outer diameter of the clamped workpiece.

[0014] In summary, this utility model has the following beneficial effects: by setting up the left adjusting plate, sliding column, left clamping column, left convex block, right clamping column, and right convex block, the workpiece clamped by the left and right clamping columns can be finely adjusted, thereby adapting to different workpieces and improving the stability of the clamped workpiece. Furthermore, the setting of the left and right convex blocks can increase the friction between the workpieces when the left and right clamping columns clamp the workpieces, further improving the clamping effect and reducing the phenomenon of workpieces accidentally detaching during rotation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial schematic diagram of the structure of the fixed plate and the left adjusting plate of this utility model;

[0017] Figure 3 This is an exploded view of the fixed plate and left adjusting plate structure of this utility model;

[0018] Figure 4 This is a partial schematic diagram of the right adjustment plate and belt structure of this utility model;

[0019] Figure 5 This is a schematic diagram showing the disassembled structure of the right adjustment plate and the snap-fit ​​column of this utility model.

[0020] In the diagram: 1. Workbench; 101. Measuring instrument body; 2. Limiting plate; 3. Adjusting hole; 4. Fixing plate; 5. Spring; 6. Damping rod; 7. Left adjusting plate; 701. Sliding groove; 8. Sliding column; 801. Sliding hole; 9. Handle; 10. Left limiting groove; 11. Left clamping column; 12. Left raised block; 13. Right adjusting plate; 14. Right clamping column; 15. Belt; 16. Rotating column; 17. Crank handle; 18. Snap-fit ​​column; 19. Right raised block; 20. Snap-fit ​​hole; 21. Protective cover. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Please refer to the embodiments of this utility model. Figures 1 to 5The concentricity measuring instrument includes a worktable 1, a limiting plate 2 fixedly connected to the worktable 1, a left adjusting plate 7 slidably connected to the limiting plate 2, a left clamping column 11 rotatably connected to the side of the left adjusting plate 7, a left convex block 12 fixedly connected to the outer periphery of the left clamping column 11, a right adjusting plate 13 slidably connected to the limiting plate 2, a right clamping column 14 rotatably connected to the side of the right adjusting plate 13, a right convex block 19 fixedly connected to the outer periphery of the right clamping column 14, and a protective cover 21 fixedly connected between the left adjusting plate 7 and the right adjusting plate 13. The bottom of the protective cover 21 is in contact with the limiting plate 2. In this embodiment, the left convex block 12 and the right convex block 19 are specifically cross-shaped convex patterns, which are used to increase friction between the left and right convex blocks and the end of the workpiece more stably. The protective cover 21 is specifically made of plastic, which is used to reduce the damage when the workpiece accidentally detaches.

[0023] The following details the specific settings of workbench 1 and limit plate 2. Please refer to them. Figure 1 The limiting plate 2 has multiple sets of adjustment holes 3 inside. The measuring instrument body 101 is provided on the side of the limiting plate 2. The measuring instrument body 101 is hinged to the worktable 1. In this embodiment, the diameter of the adjustment holes 3 is smaller than the height of the limiting plate 2 in order to improve the strength of the limiting plate 2 and thus improve its service life. The hinged setting of the measuring instrument body 101 is to adapt to different workpieces of different sizes. However, the working principle of the measuring instrument body 101 is well known in the art.

[0024] The following details the structure for fine-tuning the clamped workpiece; please refer to it. Figures 1 to 3 A fixing plate 4 is fixedly connected to one side of the limiting plate 2. The fixing plate 4 is fixedly connected to the workbench 1. A sliding hole 801 is opened inside the fixing plate 4. A sliding column 8 is slidably connected in the sliding hole 801. A handle 9 is fixedly connected to the end of the sliding column 8 near the fixing plate 4. The end of the sliding column 8 away from the handle 9 is fixedly connected to the left adjusting plate 7. A sliding groove 701 is opened at the bottom of the left adjusting plate 7. The left adjusting plate 7 is slidably connected to the limiting plate 2 through the sliding groove 701. A spring 5 is fixedly connected to the side of the left adjusting plate 7 near the fixing plate 4. The end of the spring 5 away from the left adjusting plate 7 is fixedly connected to the fixed plate 4. A damping rod 6 is provided inside the spring 5. A left limiting groove 10 is fixedly connected to the side of the left adjusting plate 7 away from the fixed plate 4. The interior of the left limiting groove 10 is rotatably connected to the left clamping column 11. The left convex block 12 provided on the outer periphery of the left clamping column 11 is provided with cross convex patterns. In this embodiment, two sets of spring 5 and damping rod 6 are provided. On the one hand, it is to improve the stability of the movement of the left adjusting plate 7. On the other hand, it is to reduce the deviation of the spring 5 when it is compressed.

[0025] The following describes a method for fixing a belt 15 to the right adjusting plate 13 near the right convex block 19. The belt 15 is rotatably connected to the right clamping post 14. A rotating post 16 is rotatably connected to the right adjusting plate 13 away from the right convex block 19. A crank 17 is fixedly connected to the end of the rotating post 16 away from the right adjusting plate 13. The belt 15 is driven through the rotating post 16. The right clamping post 14 and the rotating post 16 are driven through the belt 15. A snap-fit ​​hole 20 is provided on the side of the right adjusting plate 13. The snap-fit ​​hole 20 has the same diameter as the adjusting hole 3. A snap-fit ​​post 18 is detachably connected to the adjusting hole 3 and the snap-fit ​​hole 20. In this embodiment, the snap-fit ​​post 18 is a reinforcing rib, and the diameter of the snap-fit ​​post 18 is adapted to the diameter of the snap-fit ​​hole 20 and the adjusting hole 3. This is to enable the snap-fit ​​post 18 to more stably fix the right adjusting plate 13 and the limiting plate 2.

[0026] Working principle: First, the operator measures the dimensions of the workpiece to be inspected. Then, the operator manually adjusts the right adjusting plate 13 left and right on the limiting plate 2 to the required distance. Next, the operator inserts the locking pin 18 into the locking hole 20 and the adjusting hole 3 to fix the right adjusting plate 13. Then, the operator holds the workpiece, aligning one end of the workpiece with the right clamping pin 14, while the other end of the workpiece needs to be aligned with the left clamping pin 11. At this point, if the distance between the left clamping pin 11 and the right clamping pin 14 does not match the length of the workpiece, then... The operator pulls handle 9, causing sliding column 8 to slide in sliding hole 801, and driving left adjustment plate 7 to slide on limit plate 2 and move closer to fixed plate 4. At the same time, the movement of left adjustment plate 7 will drive left clamping column 11 on left adjustment plate 7 to move synchronously, thereby fine-tuning left clamping column 11 on left adjustment plate 7 until left clamping column 11 and right adjustment plate 13 cooperate to clamp workpiece. When left adjustment plate 7 moves, it will squeeze spring 5 and damping rod 6 so that left clamping column 11 can better adapt to clamping workpieces of different lengths.

[0027] After the workpiece is clamped, the operator needs to adjust the position of the measuring instrument body 101 so that the pointed end of the measuring instrument body 101 contacts the outer ring surface of the workpiece. Then, the operator holds the crank handle 17 and rotates it, causing the rotating column 16 to rotate synchronously. The belt 15 on the rotating column 16 will then drive the right clamping column 14 to rotate. The rotation of the right clamping column 14 will cause the workpiece, which is clamped and fixed together by the right clamping column 14 and the left clamping column 11, to rotate. The measuring instrument body 101 will detect the outer diameter of the workpiece, and the dial on the measuring instrument body 101 will display the value, which is convenient for the operator to record. If the workpiece accidentally detaches while the workpiece is being rotated by the right clamping column 14 and the left clamping column 11, the protective cover 21 can catch and protect the detached workpiece, thereby reducing the damage caused by the workpiece falling.

[0028] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A concentricity measuring instrument, comprising a worktable (1), characterized in that: A limiting plate (2) is fixedly connected to the workbench (1). A left adjusting plate (7) is slidably connected to the limiting plate (2). A left clamping column (11) is rotatably connected to the side of the left adjusting plate (7). A left convex block (12) is fixedly connected to the outer periphery of the left clamping column (11). A right adjusting plate (13) is slidably connected to the limiting plate (2). A right clamping column (14) is rotatably connected to the side of the right adjusting plate (13). A right convex block (19) is fixedly connected to the outer periphery of the right clamping column (14).

2. The concentricity measuring instrument according to claim 1, characterized in that: The limiting plate (2) has multiple sets of adjustment holes (3) inside. The measuring instrument body (101) is provided on the side of the limiting plate (2). The measuring instrument body (101) is hinged to the worktable (1).

3. The concentricity measuring instrument according to claim 2, characterized in that: A fixing plate (4) is fixedly connected to one side of the limiting plate (2). The fixing plate (4) is fixedly connected to the workbench (1). A sliding hole (801) is opened inside the fixing plate (4). A sliding column (8) is slidably connected in the sliding hole (801). A handle (9) is fixedly connected to one end of the sliding column (8) near the fixing plate (4).

4. The concentricity measuring instrument according to claim 3, characterized in that: The end of the sliding column (8) away from the handle (9) is fixedly connected to the left adjusting plate (7). The bottom of the left adjusting plate (7) is provided with a sliding groove (701). The left adjusting plate (7) is slidably connected to the limiting plate (2) through the sliding groove (701). A spring (5) is fixedly connected to the side of the left adjusting plate (7) near the fixed plate (4). The end of the spring (5) away from the left adjusting plate (7) is fixedly connected to the fixed plate (4). A damping rod (6) is provided inside the spring (5).

5. The concentricity measuring instrument according to claim 4, characterized in that: The left adjusting plate (7) is fixedly connected to a left limiting groove (10) on the side away from the fixed plate (4). The interior of the left limiting groove (10) is rotatably connected to the left clamping column (11). The left convex block (12) on the outer periphery of the left clamping column (11) is provided with cross convex patterns.

6. The concentricity measuring instrument according to claim 1, characterized in that: The right adjusting plate (13) is fixedly connected to a belt (15) on the side near the right convex block (19), and the inside of the belt (15) is rotatably connected to the right clamping column (14).

7. The concentricity measuring instrument according to claim 6, characterized in that: The right adjusting plate (13) is rotatably connected to a rotating column (16) on the side away from the right convex block (19). A crank (17) is fixedly connected to the end of the rotating column (16) away from the right adjusting plate (13). A belt (15) is driven to the rotating column (16). The right clamping column (14) and the rotating column (16) are driven to each other by the belt (15).

8. The concentricity measuring instrument according to claim 7, characterized in that: The right adjustment plate (13) has a snap-fit ​​hole (20) on its side. The snap-fit ​​hole (20) has the same diameter as the adjustment hole (3). A snap-fit ​​post (18) is detachably connected to the adjustment hole (3) and the snap-fit ​​hole (20).

9. The concentricity measuring instrument according to claim 1, characterized in that: A protective cover (21) is fixedly connected between the left adjustment plate (7) and the right adjustment plate (13), and the bottom of the protective cover (21) is in contact with the limiting plate (2).

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