An inside diameter gauge

Abstract

The present invention belongs to the technical field of measuring instrument manufacturing, and specifically relates to an internal diameter gauge, which includes a basic gauge rod. A first slider and a second slider are slidably arranged between the two ends of the basic gauge rod. A basic gauge rod braking device is provided on the first slider. A first measuring head perpendicular to the basic gauge rod is also provided on the first slider. A dial indicator with a dial indicator rod parallel to the basic gauge rod is provided on the second slider. A second measuring head is radially arranged between the first slider and the second slider on the dial indicator rod. A dial indicator rod braking device is also provided on the second slider. A first measuring head length adjusting device is provided on the first slider, and a second measuring head length adjusting device is provided on the dial indicator rod, solving the problem that the existing tools for measuring the inner diameter of a hole cannot switch states between measuring deep holes and shallow holes.

Description

Technical Field

[0001] The present invention belongs to the technical field of measuring instrument manufacturing, and particularly relates to an internal diameter gauge. Background Art

[0002] Traditional gauges for measuring the internal diameter of holes are inaccurate. For example, vernier calipers have low accuracy, and the measured readings are not direct results and need to be converted, so they cannot be directly read. Also, for general mechanical gauges, when the internal diameter of the hole is relatively small, it is very difficult for their measuring claws to extend into the hole, resulting in inaccurate measurement. Ordinary dial indicators are mainly used to measure the flatness of the surface of an object, and their measuring ranges are small, so they still cannot detect the internal diameter of holes with a small diameter. Therefore, it is necessary to design an internal diameter gauge to measure the internal diameters of deep holes, shallow holes, and holes with a small internal diameter. Summary of the Invention

[0003] The purpose of the present invention is to address the drawbacks of the prior art. By providing two sliders on the basic gauge rod and installing a dial indicator on one slider, an internal diameter gauge is designed that can measure both the internal diameter of small holes and the diameter of deep holes, solving the problem that existing tools for measuring the internal diameter of holes cannot switch states between measuring deep holes and shallow holes.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] An internal diameter gauge includes a basic gauge rod. A first slider and a second slider are slidably provided between the two ends of the basic gauge rod. A basic gauge rod braking device is provided on the first slider. A first measuring head perpendicular to the basic gauge rod is also provided on the first slider. A dial indicator with a dial indicator rod parallel to the basic gauge rod is provided on the second slider. A second measuring head is radially provided between the first slider and the second slider on the dial indicator rod. A dial indicator rod braking device is also provided on the second slider. The free ends of the first measuring head and the second measuring head both face away from the basic gauge rod. The directions of the free ends of the first measuring head and the second measuring head relative to the basic gauge rod are the same. The first measuring head and the second measuring head are parallel. A first measuring head length adjusting device is provided on the first slider. A second measuring head length adjusting device is provided on the dial indicator rod. The side of the free end of the first measuring head away from the second measuring head is on the same straight line as the 0 scale line of the basic gauge rod. The side of the second measuring head away from the first measuring head is coplanar with the side wall of the second slider close to the first slider.

[0006] Preferably, a first upright post is further provided on the surface of the first slider where the first measuring head is provided. The first upright post is perpendicular to the base dial rod. A second upright post is provided on the second slider. The second upright post is parallel to the first upright post. The second upright post and the first upright post are located on the same side of the base dial rod. The connection line between the first upright post and the second upright post is parallel to the base dial rod. The distance from the end of the first upright post away from the base dial rod to the base dial rod is equal to the distance from the end of the second upright post away from the base dial rod to the base dial rod.

[0007] Preferably, the base dial rod braking device includes a first threaded hole provided on the first slider. A first through hole is provided on the first slider. The base dial rod passes through the first through hole. The included angle between the axis of the first threaded hole and the axis of the first through hole is an acute angle. The first threaded hole communicates with the first through hole. A first adjusting bolt extends into the first through hole from outside the first slider through the first threaded hole. The first adjusting bolt is matched with the first threaded hole.

[0008] Preferably, the included angle between the axis of the first threaded hole and the axis of the first through hole is a right angle.

[0009] Preferably, the surface of the base dial rod where the scale is provided is parallel to the axis of the first threaded hole.

[0010] Preferably, the dial indicator rod braking device includes a second threaded hole. A second through hole is provided on the second slider. The base dial rod passes through the second through hole. The included angle between the axis of the second threaded hole and the axis of the second through hole is an acute angle. The second threaded hole communicates with the second through hole. A second adjusting bolt extends into the second through hole from outside the second slider through the second threaded hole. The second adjusting bolt is matched with the second threaded hole.

[0011] Preferably, the first measuring head length adjusting device includes an adjusting screw hole and a first mounting hole. Both the adjusting screw hole and the first mounting hole are provided on the first slider. The axis of the adjusting screw hole is perpendicular to the axis of the first mounting hole. The axes of the adjusting screw hole and the first mounting hole are both perpendicular to the base dial rod. The adjusting screw hole communicates with the first mounting hole. One end of the first measuring head is inserted into the first mounting hole. One end of a third adjusting bolt extends into the first mounting hole from outside the first slider through the adjusting screw hole. The end of the third adjusting bolt extending into the first mounting hole abuts between the two ends of the first measuring head.

[0012] Preferably, the second measuring head length adjusting device includes a second mounting hole, an adjusting screw hole, and a fourth adjusting bolt. The dial indicator rod is radially provided with the second mounting hole between the first slider and the second slider. The dial indicator rod is further provided with the adjusting screw hole between the first slider and the second slider. The axis of the adjusting screw hole is perpendicular to the axis of the second mounting hole. The adjusting screw hole communicates with the second mounting hole. One end of the second measuring head extends into the second mounting hole. One end of the fourth adjusting bolt extends into the second mounting hole through the adjusting screw hole. One end of the fourth adjusting bolt in the second mounting hole abuts between the two ends of the second measuring head. The fourth adjusting bolt cooperates with the adjusting screw hole.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. The present invention adopts the method of providing two sliders on the base dial rod and installing a micrometer on one slider to design an internal diameter gauge that can measure both the inner diameter of a small hole and the inner diameter of a deep hole, solving the problem that the existing tools for measuring the inner diameter of a hole cannot switch states between measuring a deep hole and a shallow hole.

[0015] 2. The present invention supports the present invention on the surface of the hole through the first column and the second column, which can ensure that the free ends of the first measuring head and the second measuring head are on the same cross-section of the measured hole in the measured hole. In this way, the measured inner diameter is more accurate. At the same time, the operation skills are reduced, so that both old workers and new workers can quickly apply the operation method of the present invention, and do not rely on too much experience to judge whether the free ends of the first measuring head and the second measuring head are on the same cross-section of the measured hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is a schematic structural diagram of the bottom of the present invention.

[0018] Wherein, 1. Base dial rod; 2. First slider; 3. Second slider; 4. First measuring head; 5. Dial indicator rod; 6. Dial indicator; 7. Second measuring head; 8. First column; 9. Second column; 10. First threaded hole; 11. First through hole; 12. Second threaded hole; 13. Second through hole; 14. Adjusting screw hole; 15. First mounting hole; 16. First adjusting bolt; 17. Second adjusting bolt; 18. Third adjusting bolt; 19. Second mounting hole; 20. Adjusting screw hole; 21. Fourth adjusting bolt. DETAILED DESCRIPTION OF THE INVENTION

[0019] See Figure 1-2As shown, an inside diameter gauge includes a base gauge rod 1. A first slider 2 and a second slider 3 are slidably provided between the two ends of the base gauge rod 1. A base gauge rod braking device is provided on the first slider 2. A first measuring head 4 perpendicular to the base gauge rod 1 is also provided on the first slider 2. A dial indicator rod 5 parallel to the base gauge rod 1 and a dial indicator 6 are provided on the second slider 3. A second measuring head 7 is radially provided on the dial indicator rod 5 between the first slider 2 and the second slider 3. A dial indicator rod braking device is also provided on the second slider 3. The free ends of the first measuring head 4 and the second measuring head 7 both face away from the base gauge rod 1. The directions of the free ends of the first measuring head 4 and the second measuring head 7 relative to the base gauge rod 1 are the same. The first measuring head 4 and the second measuring head 7 are parallel. A first measuring head length adjusting device is provided on the first slider 2. A second measuring head length adjusting device is provided on the dial indicator rod 5. The side of the free end of the first measuring head 4 away from the second measuring head 7 is in the same straight line as the 0 scale line of the base gauge rod 1. The side of the second measuring head 7 away from the first measuring head 4 is coplanar with the side wall of the second slider 3 close to the first slider.

[0020] In this embodiment, during use, calibration is performed by adjusting the base gauge rod braking device so that the side of the free end of the first measuring head 4 away from the second measuring head 7 is in the same straight line as the 0 scale line of the base gauge rod 1. Then, the relative position between the first slider 2 and the base gauge rod 1 is fixed by the base gauge rod braking device. Then, both the first measuring head 4 and the second measuring head 7 are inserted into the hole to be measured, so that the side of the free end of the first measuring head 4 away from the second measuring head 7 contacts the inner wall of the measured hole. Then, the second slider 3 is slid so that the second measuring head 7 also contacts the inner wall of the measured hole. At this time, the reading on the base gauge rod 1 and the reading on the dial indicator 6 are read, and then the two readings are added together. In this way, the measurement is accurate vertically. At the same time, the settings of the first measuring head length adjusting device and the second measuring head length adjusting device enable the present invention to adapt to measured holes of different depths.

[0021] As a preferred embodiment, a first upright post 8 is further provided on the surface of the first slider 2 where the first measuring head 4 is provided. The first upright post 8 is perpendicular to the base dial rod 1. A second upright post 9 is provided on the second slider 3. The second upright post 9 is parallel to the first upright post 8. The second upright post 9 and the first upright post 8 are located on the same side of the base dial rod 1. The connection line between the first upright post 8 and the second upright post 9 is parallel to the base dial rod 1. The distance from the end of the first upright post 8 away from the base dial rod 1 to the base dial rod 1 is equal to the distance from the end of the second upright post 8 away from the base dial rod 1 to the base dial rod 1. By providing the first upright post 8 and the second upright post 9, when measuring the inner diameter of the hole, the present invention is supported on the surface of the hole through the first upright post 8 and the second upright post 9, which can ensure that the free ends of the first measuring head 4 and the second measuring head 7 are on the same cross-section of the measured hole in the measured hole. In this way, the measured inner diameter is more accurate. At the same time, the operation skill is reduced, so that both old workers and new workers can quickly adapt to the operation method of the present invention, and they no longer rely on too much experience to judge whether the free ends of the first measuring head 4 and the second measuring head 7 are on the same cross-section of the measured hole.

[0022] As a preferred embodiment, the base dial rod braking device includes a first threaded hole 10 provided on the first slider 2. A first through hole 11 is provided on the first slider 2. The base dial rod 1 passes through the first through hole 11. The included angle between the axis of the first threaded hole 10 and the axis of the first through hole 11 is an acute angle. The first threaded hole 10 communicates with the first through hole 11. A first adjusting bolt 16 extends from outside the first slider 2 into the first through hole 11 through the first threaded hole 10. The first adjusting bolt 16 is matched with the first threaded hole 10.

[0023] As a preferred embodiment, the included angle between the axis of the first threaded hole 10 and the axis of the first through hole 11 is a right angle, so that it can be ensured that after the first adjusting bolt 16 is screwed into the first threaded hole 10, a radial force can be applied to the base dial rod to prevent the base dial rod 1 from sliding relative to the first slider 2.

[0024] As a preferred embodiment, the surface of the base dial rod 1 where the scale is provided is parallel to the axis of the first threaded hole 10. With such a setting method, it is more accurate and stable in the process of controlling the base dial rod 1.

[0025] As a preferred manner, the dial indicator rod braking device includes a second threaded hole 12. A second through hole 13 is provided on the second slider 3. The base rod 1 passes through the second through hole 13. The included angle between the axis of the second threaded hole 12 and the axis of the second through hole 13 is an acute angle. The second threaded hole 12 communicates with the second through hole 13. A second adjusting bolt 17 extends into the second through hole 13 from outside the second slider 3 through the second threaded hole 12, and the second adjusting bolt 17 is matched with the second threaded hole 12.

[0026] As a preferred manner, the first measuring head length adjusting device includes an adjusting screw hole 14 and a first mounting hole 15. The adjusting screw hole 14 and the first mounting hole 15 are both provided on the first slider 2. The axis of the adjusting screw hole 14 is perpendicular to the axis of the first mounting hole 15. The axes of the adjusting screw hole 14 and the first mounting hole 15 are both perpendicular to the base rod 1. The adjusting screw hole 14 communicates with the first mounting hole 15. One end of the first measuring head 2 is inserted into the first mounting hole 15. One end of a third adjusting bolt 18 extends into the first mounting hole 15 from outside the first slider 3 through the adjusting screw hole 14. The end of the third adjusting bolt 18 extending into the first mounting hole 15 abuts between the two ends of the first measuring head 4. The first measuring head 4 mounted on the first mounting hole 15 is fixed by the adjusting screw hole 14 and the third adjusting bolt 18.

[0027] As a preferred manner, the second measuring head length adjusting device includes a second mounting hole 19, an adjusting wire hole 20, and a fourth adjusting bolt 21. The dial indicator rod 5 is radially provided with the second mounting hole 19 between the first slider 2 and the second slider 3. The dial indicator rod 5 is further provided with the adjusting wire hole 20 between the first slider 2 and the second slider 3. The axis of the adjusting wire hole 20 is perpendicular to the axis of the second mounting hole 19. The adjusting wire hole 20 communicates with the second mounting hole 19. One end of the second measuring head 7 extends into the second mounting hole 19. One end of the fourth adjusting bolt 21 extends into the second mounting hole 19 through the adjusting wire hole 20. The end of the fourth adjusting bolt 21 in the second mounting hole 19 abuts between the two ends of the second measuring head 7, and the fourth adjusting bolt 21 is matched with the adjusting wire hole 20.

Claims

1. An inside diameter gauge, characterized in that, It includes a base table rod (1), between the two ends of the base table rod (1), a first slider (2) and a second slider (3) are slidably arranged. A base table rod braking device is arranged on the first slider (2). A first measuring head (4) perpendicular to the base table rod (1) is also arranged on the first slider (2). A dial indicator rod (5) and a dial indicator (6) parallel to the base table rod (1) are arranged on the second slider (3). A second measuring head (7) is radially arranged on the dial indicator rod (5) between the first slider (2) and the second slider (3). A dial indicator rod braking device is also arranged on the second slider (3). The free ends of the first measuring head (4) and the second measuring head (7) both face away from the base table rod (1). The directions of the free ends of the first measuring head (4) and the second measuring head (7) relative to the base table rod (1) are the same. The first measuring head (4) and the second measuring head (7) are parallel. A first measuring head length adjusting device is arranged on the first slider (2). A second measuring head length adjusting device is arranged on the dial indicator rod (5). The side of the free end of the first measuring head (4) far from the second measuring head (7) is on the same straight line as the 0 scale line of the base table rod (1). The side of the second measuring head (7) far from the first measuring head (4) is coplanar with the side wall of the second slider (3) close to the first slider; A first upright column (8) is also arranged on the surface of the first slider (2) where the first measuring head (4) is arranged. The first upright column (8) is perpendicular to the base table rod (1). A second upright column (9) is arranged on the second slider (3). The second upright column (9) is parallel to the first upright column (8). The second upright column (9) and the first upright column (8) are on the same side of the base table rod (1). The connection line between the first upright column (8) and the second upright column (9) is parallel to the base table rod (1). The distance from the end of the first upright column (8) far from the base table rod (1) to the base table rod (1) is equal to the distance from the end of the second upright column (8) far from the base table rod (1) to the base table rod (1); The first measuring head length adjusting device includes an adjusting screw hole (14) and a first mounting hole (15). Both the adjusting screw hole (14) and the first mounting hole (15) are arranged on the first slider (2). The axis of the adjusting screw hole (14) is perpendicular to the axis of the first mounting hole (15). The axes of the adjusting screw hole (14) and the first mounting hole (15) are both perpendicular to the base table rod (1). The adjusting screw hole (14) is communicated with the first mounting hole (15). One end of the first measuring head (2) is inserted into the first mounting hole (15). One end of a third adjusting bolt (18) extends into the first mounting hole (15) from outside the first slider (2) through the adjusting screw hole (14). The end of the third adjusting bolt (18) extending into the first mounting hole (15) abuts between the two ends of the first measuring head (4).

2. The inside diameter gauge according to claim 1, characterized in that, The base dial rod braking device includes a first threaded hole (10) provided on the first slider (2). A first through hole (11) is provided on the first slider (2). The base dial rod (1) passes through the first through hole (11). The included angle between the axis of the first threaded hole (10) and the axis of the first through hole (11) is an acute angle. The first threaded hole (10) communicates with the first through hole (11). A first adjusting bolt (16) extends from outside the first slider (2) into the first through hole (11) through the first threaded hole (10). The first adjusting bolt (16) is engaged with the first threaded hole (10).

3. An inside diameter gauge according to claim 2, characterized in that, The surface of the base dial rod (1) where the scale is set is parallel to the axis of the first threaded hole (10).

4. An inside diameter gauge according to claim 1, characterized in that, The dial indicator rod braking device includes a second threaded hole (12). A second through hole (13) is provided on the second slider (3). The base dial rod (1) passes through the second through hole (13). The included angle between the axis of the second threaded hole (12) and the axis of the second through hole (13) is an acute angle. The second threaded hole (12) communicates with the second through hole (13). A second adjusting bolt (17) extends from outside the second slider (3) into the second through hole (13) through the second threaded hole (12). The second adjusting bolt (17) is engaged with the second threaded hole (12).

5. A bore gauge according to claim 1, characterized in that, The second measuring head length adjusting device includes a second mounting hole (19), an adjusting threaded hole (20), and a fourth adjusting bolt (21). The dial indicator rod (5) radially provides the second mounting hole (19) between the first slider (2) and the second slider (3). The dial indicator rod (5) also has the adjusting threaded hole (20) between the first slider (2) and the second slider (3). The axis of the adjusting threaded hole (20) is perpendicular to the axis of the second mounting hole (19). The adjusting threaded hole (20) communicates with the second mounting hole (19). One end of the second measuring head (7) extends into the second mounting hole (19). One end of the fourth adjusting bolt (21) extends into the second mounting hole (19) through the adjusting threaded hole (20). The end of the fourth adjusting bolt (21) inside the second mounting hole (19) abuts between the two ends of the second measuring head (7). The fourth adjusting bolt (21) is engaged with the adjusting threaded hole (20).

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