A digital depth caliper for measuring small hole grooves

Abstract

A digital depth caliper for measuring grooves in small holes, used to measure dimensions X and B as shown in Figure 1; the invention consists of a point measuring head assembly, a measuring rod, a column base, a main scale assembly, and a scale frame assembly. The measuring rod is fastened to the scale frame in the scale frame assembly with screws. The scale frame assembly is fitted onto the main scale assembly, which is inserted into a rectangular groove in the column base. The measuring rod is inserted into a circular hole in the column base, and the external thread of the point measuring head is screwed into a hole in the internal thread on the measuring rod. The main scale base has a circular hole C for the measuring rod to pass through and a rectangular hole D for inserting the main scale. The main scale assembly consists of a main scale and a fixed grid. The scale frame assembly has the same structure and principle as the original digital caliper. During measurement, the measuring rod and the point measuring head assembly extend into the groove of the part being measured. The point measuring head is moved up and down so that it contacts the upper and lower parts of the groove respectively. The X and B values ​​of the groove are calculated by digital display measurement.

Description

Technical Field

[0001] This invention relates to the field of measurement technology, and particularly to the field of internal hole groove measurement technology. Background Technology

[0002] Measuring internal grooves is a challenging task, especially measuring internal grooves with an inner diameter of 6 mm, which is extremely difficult and cannot be measured by existing digital depth calipers. Summary of the Invention

[0003] This invention is a novel measuring device that can measure the position and width of an inner groove with an inner diameter of 6 mm.

[0004] A digital depth caliper for measuring small hole grooves comprises a point probe assembly, a measuring rod, a column base, a main scale assembly, and a scale frame assembly. The measuring rod is screwed to the scale frame within the scale frame assembly; the scale frame assembly is fitted onto the main scale assembly; the main scale assembly is inserted into a rectangular groove in the column base; the measuring rod is inserted into a circular hole in the column base; and the external thread of the point probe is screwed into a hole in the internal thread of the measuring rod. The point probe assembly consists of a point probe base, a point probe rod, and a point probe; the point probe is bonded to the point probe rod with adhesive, and the point probe rod is bonded to a small hole in the point probe base with adhesive. The measuring rod has a screw hole for connection to the measuring frame, and its lower part has… The main scale assembly has a screw hole for connecting to the measuring head assembly; the main scale base has a round hole C for the measuring rod to pass through and a rectangular hole D for inserting the main scale; the main scale assembly consists of a main scale and a fixed grid, the main scale has a groove to avoid the measuring rod and a groove to cooperate with the fixed grid, the fixed grid is glued to the groove of the main scale; the scale frame assembly consists of an electronic component board, a scale frame and knurled screws, the electronic component board and the scale frame are connected as one piece with screws, the knurled screws are screwed into the screw holes of the scale frame, the electronic component board consists of a plastic shell and electronic components, the electronic components consist of a moving grid, a sensor and a display part, the scale frame assembly is exactly the same in structure and principle as the original digital caliper. Attached Figure Description

[0005] Figure 1 It is a sectional view of the part being measured.

[0006] In the diagram, the inner hole of the part being measured is φ6, and dimensions X and B need to be measured.

[0007] Figure 2 This is the front view of the present invention.

[0008] In the diagram, the measuring head assembly is 1, the measuring rod is 2, the main scale base is 3, the main scale is 4, and the scale frame assembly is 5.

[0009] Figure 3 This is an enlarged view of the point probe assembly 1 in this invention.

[0010] In the diagram, there is a probe holder .1-1, a probe rod .1-2, and a probe .1-3. The probe is a spherical ruby ​​with a hole. The ruby ​​is glued to the probe rod with adhesive, and the probe rod is glued to the hole in the probe holder with adhesive. Ruby has high hardness and is wear-resistant.

[0011] Figure 4 This is the front view of the measuring rod 2 in this invention.

[0012] In the figure, the upper part has a screw hole for connecting with the ruler frame 5-2 in the ruler frame assembly 5, and the lower part has a screw hole for connecting with the point measuring head assembly 1;

[0013] Figure 5 This is a top view of the main scale base 3 in this invention.

[0014] Figure 6 yes Figure 5 AA section view

[0015] In the figure, the main scale holder .3 has a round hole C for the measuring rod to pass through and a rectangular hole D for inserting the main scale;

[0016] Figure 7 This is the front view of the main scale component 4 in this invention.

[0017] Figure 8 yes Figure 7 Top view

[0018] Figure 8 In the diagram, the main scale is .4-1 and the fixed grid is .4-2. The upper part of the main scale has a groove to avoid the measuring rod .2, and the lower part of the main scale has a groove to cooperate with the fixed grid. The fixed grid is glued to the groove of the main scale with adhesive.

[0019] Figure 9 This is the front view of the ruler frame component 5 in this invention.

[0020] Figure 10 yes Figure 9 BB cross-sectional view

[0021] In the diagram, the electronic component board .5-1 and the ruler frame .5-2 have grooves at the bottom that mate with the electronic component board. The electronic component board and the ruler frame are connected as one unit with screws. Knurled screws .5-3 are used to fix the ruler frame assembly .5. The electronic component board consists of a plastic shell and electronic components. The electronic components consist of a moving grid, a sensor, and a display part. The ruler frame assembly .5 has the same structure and principle as the original digital caliper. Detailed Implementation

[0022] This invention is used to measure, such as Figure 1 The part to be measured is shown in the figure. The inner hole of the part to be measured is φ6. The dimensions X and B need to be measured.

[0023] This invention comprises a point probe assembly, a probe rod, a column base, a main scale assembly, and a scale frame assembly. The probe rod is fastened to the scale frame in the scale frame assembly with screws. The scale frame assembly is fitted onto the main scale assembly, which is inserted into a rectangular slot in the column base. The probe rod is inserted into a circular hole in the column base, and the external thread of the point probe is screwed into a hole in the internal thread of the probe rod. The point probe assembly consists of a point probe base, a point probe rod, and a point probe. The point probe is bonded to the point probe rod with adhesive, and the point probe rod is bonded to a small hole in the point probe base with adhesive. The probe rod has a screw hole for connecting to the probe frame and a screw hole at the bottom for connecting to the point probe assembly. The main scale base... The device has a circular hole C for the measuring rod to pass through and a rectangular hole D for inserting the main scale. The main scale assembly consists of a main scale and a fixed grid. The main scale has a groove to avoid the measuring rod and a groove to mate with the fixed grid. The fixed grid is glued into the groove of the main scale. The frame assembly consists of an electronic component board, a frame, and knurled screws. The electronic component board and the frame are connected as one unit with screws. The knurled screws are screwed into the screw holes of the frame to fix the frame assembly to the main scale. The electronic component board consists of a plastic shell and electronic components. The electronic components consist of a moving grid, a sensor, and a display. The frame assembly has the same structure and principle as the original digital caliper.

[0024] During measurement, the measuring rod and the point measuring head assembly are inserted into the hole of the part being measured. The position of the point measuring head assembly is adjusted up, down, left, and right so that the point measuring head in the point measuring head assembly is located in the groove of the part being measured. The point measuring head is moved up and down so that the moving point measuring head contacts the upper and lower parts of the groove respectively. The X value and B value of the groove are calculated by digital display measurement.

Claims

1. A digital depth caliper for measuring small hole grooves, comprising a point measuring head assembly (1), a measuring rod (2), a column base (3), a main scale assembly (4), and a scale frame assembly (5), characterized in that, The measuring rod is fastened to the ruler frame (5-2) in the ruler frame assembly (5-1) with screws. The ruler frame assembly is fitted onto the main ruler assembly, which is inserted into the rectangular slot of the column base. The measuring rod is inserted into the round hole of the column base, and the external thread of the point measuring head is screwed into the hole of the internal thread on the measuring rod. The point measuring head assembly consists of a point measuring head seat (1-1), a point measuring head rod (1-2), and a point measuring head (1-3). The point measuring head is bonded to the point measuring head rod with adhesive, and the point measuring head rod is bonded to the small hole of the point measuring head seat with adhesive. The measuring rod has a screw hole for connecting to the measuring frame and a screw hole at the bottom for connecting to the point measuring head assembly. The main ruler seat has a round hole C for the measuring rod to pass through and a rectangular hole D for inserting the main ruler. The main ruler assembly consists of a main ruler (4-1) and a fixed grid. (4-2) The main scale has a groove to avoid the measuring rod and a groove to cooperate with the fixed grid. The fixed grid is glued to the groove of the main scale. The scale frame assembly consists of an electronic component board (5-1), a scale frame (5-2), and knurled screws (5-3). The electronic component board and the scale frame are connected as one unit with screws. The knurled screws are screwed into the screw holes of the scale frame to fix the scale frame assembly to the main scale. The electronic component board consists of a plastic shell and electronic components. The electronic components consist of a moving grid, a sensor, and a display part. The scale frame assembly has the same structure and principle as the original digital caliper.

Images