Dial indicator measuring force detection device

Abstract

The utility model discloses a dial indicator measuring force detection device, which comprises a torsion spring comparator arranged on a measuring frame bedplate, a micrometer head arranged on the measuring frame bedplate at one side of the torsion spring comparator, a dial indicator to be detected arranged on an indicator clamp above the measuring frame bedplate at the other side of the torsion spring comparator, the indicator clamp is arranged on a vertical rod, and the vertical rod is arranged on the measuring frame bedplate. A spring plate and a lever plate at the upper and lower positions are arranged below the testing frame bedplate; one end of the spring plate is fixed on one side of the micrometer head, one end of the lever plate is installed on one side of the micrometer head through the vertical spring piece, and the other end of the lever plate is connected to the elastic piece frame. The vertical rod passes through the measuring frame bedplate and is installed on the elastic sheet frame, the measuring rod I of the detected dial indicator abuts against the bearing pin, and the bearing pin passes through the measuring frame bedplate and is installed on the other end of the spring plate. A measuring rod II of the torsion spring comparator penetrates through the measuring frame bedplate and abuts against the spring plate; a micrometer lead screw of the micrometer head penetrates through the measuring frame bedplate and the spring plate to abut against a hemispherical steel ball arranged on the lever plate.

Description

Technical Field

[0001] This utility model relates to geometric measurement instruments, specifically a dial indicator for measuring force. Background Technology

[0002] According to the national standard GB / T 1219-2008, the measuring force of a dial indicator should be:

[0003] 1. Measuring force: 0.4N~1.5N.

[0004] 2. Force change measured: 0.5N.

[0005] 3. Measuring force drop: 0.5N.

[0006] When testing the force measured by a dial indicator, the conventional method is to use a weight, which involves inverting the dial indicator so that the measuring rod is vertical and suspending a weight on the measuring rod to measure the force. This method is relatively cumbersome, has a large measurement error, and the force measurement is inaccurate. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model proposes a dial gauge force measuring instrument that provides accurate detection.

[0008] The technical solutions for dial indicator force measurement instruments that can solve the problems of existing technologies include:

[0009] 1. A torsion spring comparator is mounted on the test frame platform via support I. A differential head is mounted on the test frame platform on one side of the torsion spring comparator via support II. The dial indicator under test is mounted on the gauge clamp above the test frame platform on the other side of the torsion spring comparator. The gauge clamp is mounted on the upright. The test frame platform is provided with upper and lower spring plates and lever plates.

[0010] 2. One end of the spring plate is fixed to one side of the micrometer head, one end of the lever plate is installed on one side of the micrometer head through a vertical spring sheet, and the other end of the lever plate is connected to a spring sheet frame that can be elastically returned up and down.

[0011] 3. The upright rod passes through the measuring frame platform and is installed on the spring plate. The measuring rod I of the dial indicator under test abuts downward against the bearing pin. The bearing pin passes through the measuring frame platform and is installed on the other end of the spring plate.

[0012] 4. The measuring rod II of the torsion spring comparator passes through the measuring frame platform and abuts against the spring plate.

[0013] 5. The micrometer screw of the micrometer head passes through the measuring frame plate and the spring plate and abuts against the hemispherical steel ball set on the lever plate.

[0014] Furthermore, the frame of the spring clip is mounted on a compression spring, and the compression spring has a guide rod connected to the frame inside. The frame is mounted on a spring seat by a horizontal spring sheet.

[0015] Furthermore, the measuring range of the dial gauge under test is less than 12.7 mm.

[0016] The beneficial effects of this utility model are:

[0017] This utility model relates to a dial indicator force measurement instrument, which is a technical solution for detecting the force measured by a dial indicator. The solution uses a lever plate connected to a spring holder. The rotation of the micrometer screw causes the upright rod to move the measuring rod I of the dial indicator under test up and down via the indicator clamp. The measuring rod I of the dial indicator presses against the bearing pin, causing the bearing pin to act on a spring plate. The spring plate then moves the measuring rod II of the torsion spring comparator, causing the pointer to swing (each swing of the pointer corresponds to one unit of measuring force), thus achieving accurate detection of the dial indicator's force. Attached Figure Description

[0018] Figure 1 This is a front view of one embodiment of the present invention.

[0019] Figure 2 for Figure 1 Side view of the implementation method.

[0020] Figure 3 for Figure 1 A magnified view of a portion of point A in the middle.

[0021] Drawing number markings: 1. Support I; 2. Measuring frame platform; 3. Torsion spring comparator; 4. Differential head; 5. Support II; 6. Dial indicator under test; 7. Indicator clamp; 8. Spring plate; 9. Lever plate; 10. Vertical spring plate; 11. Spring plate holder; 11-1. Frame; 11-2. Compression spring; 11-3. Guide rod; 11-4. Horizontal spring plate; 11-5. Spring seat; 12. Upright pole; 13. Bearing pin; 14. Hemispherical steel ball; 15. Base frame. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the embodiments shown in the accompanying drawings.

[0023] This utility model relates to a dial indicator force measuring instrument, comprising a measuring frame 2 supported by a frame-shaped base 15. A torsion spring comparator 3 is mounted on the measuring frame 2 via a support I1, and the measuring rod II of the torsion spring comparator 3 passes downward through the measuring frame 2. A micrometer head 4 is mounted on the measuring frame 2 to the right of the torsion spring comparator 3 via a support II5, and the micrometer screw of the micrometer head 4 passes downward through the measuring frame 2. A dial indicator 6 (with a measuring range less than 12.7 mm) is mounted above the measuring frame 2 to the left of the torsion spring comparator 3. The dial indicator 6 is mounted on the front end of a clamp 7, and the rear end of the clamp 7 is mounted on a vertical rod 12, which penetrates the measuring frame 2. The measuring rod I of the dial indicator 6, the measuring rod II of the torsion spring comparator 3, and the micrometer screw of the micrometer head 4 are on the same vertical plane in the left and right directions, respectively. Figure 1 , Figure 2 As shown.

[0024] The base 15 below the measuring platform 2 is equipped with upper and lower spring plates 8 and lever plates 9. The right end of the spring plate 8 is fixed to the bottom of the measuring platform 2 on the right side of the micrometer head 4, and the left end of the spring plate 8 corresponds to the measuring rod I of the dial indicator 6 under test. The measuring rod II of the torsion spring comparator 3 abuts against the plate body of the spring plate 8. The right end of the lever plate 9 is installed at the bottom of the measuring platform 2 on the right side of the right end of the spring plate 8 through a vertical spring plate 10. The left end of the lever plate 9 is connected to the spring plate holder 11 located below the upright 12. Figure 1 , Figure 2 As shown.

[0025] The spring clip holder 11 includes a front-rear frame 11-1. A thinned portion in the middle of the frame 11-1 is press-fitted onto a vertical compression spring 11-2. The compression spring 11-2 is located at the bottom of the base 15. A guide rod 11-3 connected to the bottom of the frame 11-1 is provided inside the compression spring 11-2. The top and bottom of the front and rear of the frame 11-1 are mounted on the left ends of upper and lower horizontal spring plates 11-4, respectively. The right ends of the upper and lower horizontal spring plates 11-4 are respectively mounted on the top and bottom of corresponding spring seats 11-5. A pin hole is provided on the frame 11-1 corresponding to the upright 12. The lower end of the upright 12 is tightly fitted into the pin hole of the frame 11-1. Figure 2 , Figure 3 As shown.

[0026] The measuring rod I of the dial indicator 6 under test is provided with a bearing pin 13 that passes through the measuring frame plate 2. The measuring rod I of the dial indicator 6 under test abuts downward against the bearing pin 13, and the bearing pin 13 abuts downward against the left end of the spring plate 8. Figure 1 , Figure 2 As shown.

[0027] The micrometer screw of the differential head 4 passes downward through the measuring frame plate 2 and the spring plate 8 and abuts against the hemispherical steel ball 14 set on the lever plate 9, such as Figure 1 As shown.

[0028] The working principle of this utility model dial indicator force measuring instrument is as follows:

[0029] Rotating the micrometer head 4 causes the micrometer screw to move the lever plate 9 up and down. The lever plate 9 drives the spring holder 11 and the upright rod 12 to move up and down. The upright rod 12 drives the measuring rod I of the dial indicator 6 under test to move up and down through the clamp 7. The measuring rod I drives the spring plate 8 to move up and down through the bearing pin 13. The spring plate 8 drives the measuring rod II of the torsion spring comparator 3 to move up and down. The up and down movement of the measuring rod II causes the pointer of the torsion spring comparator 3 to swing forward and backward. The measuring force (N) on the bearing pin 13 corresponding to each swing of the pointer of the torsion spring comparator 3 is measured and the actual number of swings of the pointer is recorded. This allows the detection of the measuring force of the dial indicator 6 under test.

[0030] The steps of this utility model's dial indicator force measurement method are as follows:

[0031] 1. Before calibration, adjust the pointer of the torsion spring comparator 3 to zero (the measuring rod II lightly touches the spring plate 8).

[0032] 2. Place a weight on the bearing pin 13 and press down the spring plate 8. The pointer of the torsion spring comparator 3 swings in the opposite direction. When the pointer swings by 1 division, record the weight in grams and convert it into a force value (0.049N).

[0033] 3. During the inspection, the dial indicator 6 to be inspected is installed on the clamp 7, and the measuring rod I of the dial indicator 6 to be inspected is pressed downward against the bearing pin 13.

[0034] 4. Rotate the micrometer head 4 to extend or retract the micrometer screw, so that the dial indicator 6 under test is at the beginning, middle and end of the working stroke. Record the number of pointer swings for the corresponding stroke to measure the force value.

[0035] 5. Continue to rotate the differential head 4 until the pointer of the dial indicator 6 under test exceeds half a turn of the end working stroke, then reverse the differential head 4 and record the force measurement data of the end point, midpoint and start point working strokes. The six force values ​​obtained are all within the required range.

[0036] 6. The difference between the maximum and minimum measuring force during the forward stroke is the force change, and the difference between the forward and reverse strokes at the same point is the force drop.

Claims

1. A dial indicator for measuring force, characterized in that: The instrument includes a torsion spring comparator (3) mounted on the test frame plate (2) via support I (1), a differential head (4) mounted on the test frame plate (2) on one side of the torsion spring comparator (3) via support II (5), a dial indicator (6) to be tested mounted on a clamp (7) above the test frame plate (2) on the other side of the torsion spring comparator (3), the clamp (7) being mounted on a pole (12), and a spring plate (8) and a lever plate (9) in upper and lower positions located below the test frame plate (2). One end of the spring plate (8) is fixed to one side of the micrometer head (4), one end of the lever plate (9) is installed on one side of the micrometer head (4) through a vertical spring sheet (10), and the other end of the lever plate (9) is connected to the spring sheet frame (11) that can be elastically returned up and down. The upright (12) passes through the measuring frame plate (2) and is installed on the spring plate frame (11). The measuring rod I of the dial indicator (6) under test touches downward on the bearing pin (13). The bearing pin (13) passes through the measuring frame plate (2) and is installed on the other end of the spring plate (8). The measuring rod II of the torsion spring comparator (3) passes through the measuring frame plate (2) and abuts against the spring plate (8); The micrometer screw of the micrometer head (4) passes through the measuring platform (2) and the spring plate (8) and abuts against the hemispherical steel ball (14) set on the lever plate (9).

2. The dial indicator force measuring instrument according to claim 1, characterized in that: The frame (11-1) of the spring clip holder (11) is mounted on a compression spring (11-2). The compression spring (11-2) has a guide rod (11-3) inside that is connected to the frame (11-1). The frame (11-1) is mounted on a spring seat (11-5) via a horizontal spring sheet (11-4).

3. The dial gauge measuring force detection device according to claim 2, characterized by: The range of the dial gauge (6) under test is less than 12.7 mm.

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