Dial indicator detection tool

Abstract

The utility model discloses a dial indicator detection tool, comprising a micrometer head and a dial indicator which are arranged on the same horizontal plane, and the dial indicator and the micrometer head which are opposite to each other are arranged in a front-and-back staggered manner; the alignment dial indicator is provided with a support which is installed on the front vertical spring piece I and the rear vertical spring piece I. Levers which are horizontal in the left direction and the right direction are arranged in the support. One end of the lever is hinged, and the front side of the other end of the lever is provided with an elastic element I so that the lever backwards abuts against a micrometer lead screw of the micrometer head; an elastic element II is arranged on the rear side of the support so that the support can abut against the measuring rod of the dial indicator forwards. The bracket is forwards propped against the lever through a point support; the length of a driving arm of the lever is the distance from the abutting end of the micrometer lead screw to the hinging point, and the length of a driven arm of the lever is the distance from the point support to the hinging point. According to the utility model, the lever ratio is adjusted by using the eccentric steel ball, so that the displacement output to the measuring rod of the dial indicator is 0.0005 mm every time the micrometer screw rod of the micrometer head moves 0.01 mm, and the detection of the micrometer indication error is realized.

Description

Technical Field

[0001] The utility model relates to a geometric measuring tool detection technology, in particular to a micrometer detection tool. Background Art

[0002] Differential head measuring instruments are a type of general measuring instrument that is commonly used in geometric measuring instruments.

[0003] With the extensive use of micrometer head products in the market, some shortcomings have also been exposed. For example, when using a micrometer head to detect the error of the thousandth indication value, the graduation value of an ordinary micrometer head is 0.01mm, and it is impossible to directly measure the micrometer with a graduation value of 0.001mm. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model aims to solve the prior art problem by proposing a micrometer detection fixture which adopts a differential head to detect the error of the micrometer indication value.

[0005] The micrometer test fixture that can solve the above technical problems includes a micrometer head and a micrometer. The difference is:

[0006] 1. On the same horizontal plane, the micrometer and differential head facing each other are installed in a front and rear offset manner.

[0007] 2. The micrometer is provided with a bracket mounted on the front and rear vertical spring pieces I, and the bracket is provided with a left and right horizontal lever.

[0008] 3. One end of the lever is hinged, and the front side of the other end of the lever is provided with an elastic element I to press the lever backward onto the micrometer screw of the micrometer head.

[0009] 4. An elastic element II is provided on the rear side of the bracket to press the bracket forward onto the measuring rod of the dial indicator.

[0010] 5. The bracket is pressed forward on the lever through point support.

[0011] 6. The length of the active arm of the lever is the distance from the pressing end of the micrometer screw to the hinge point, and the length of the driven arm of the lever is the distance from the point support to the hinge point.

[0012] Furthermore, in order to improve the wear resistance, the bracket is inlaid with an alloy block that contacts the (telescopic) measuring rod of the dial indicator.

[0013] Furthermore, in order to improve the sensitivity, a steel ball is embedded on the lever and contacts the micrometer screw of the micrometer head.

[0014] Furthermore, in order to fine-tune the length of the driven arm, a structure of the point support includes a knob installed on the lever, and an eccentric steel ball is provided on the knob.

[0015] Furthermore, to simplify the structure, the hinge structure at one end of the lever includes a spring leaf II obliquely mounted on the lever via a spring seat I.

[0016] Beneficial effects of the utility model:

[0017] In the structure of the micrometer detection fixture of the utility model, the lever ratio is adjusted by utilizing the different height positions of the eccentric steel ball, so that when the micrometer screw of the micrometer head moves 0.01mm, the output displacement to the micrometer measuring rod is 0.0005mm, thereby realizing the detection of the error of the micrometer indication value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of an embodiment of the utility model.

[0019] Figure 2 for Figure 1 AA section view in.

[0020] Figure 3 for Figure 1 A partial enlarged view of point B in the middle.

[0021] Figure number identification: 1. Differential head; 1-1. Micrometer screw; 2. Micrometer; 2-1. Measuring rod; 3. Frame; 4. Spring sheet I; 5. Bracket; 6. Lever; 7. Elastic element I; 8. Elastic element II; 9. Knob; 10. Steel ball; 11. Alloy block; 12. Steel ball; 13. Spring sheet II; 14. Spring seat I; 15. Spring seat II; 16. Locking mechanism. DETAILED DESCRIPTION

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

[0023] The utility model of the micrometer detection fixture includes a differential head 1 and a micrometer 2 arranged on a frame 3 and a lever mechanism arranged in the frame 3, such as Figure 1 、 Figure 2 shown.

[0024] The frame 3 is a square frame plate, including front, rear, left, right plates and a middle partition. A clamp-type locking mechanism 16 is provided in the mounting hole I on the upper right side of the front plate, and a mounting hole II is provided on the upper left side of the rear plate on the same horizontal plane as the mounting hole I; a bracket 5 is provided between the front and rear plates above the partition for aligning the mounting hole I, and the bracket 5 is mounted on the front and rear spring sheets I4, which are vertically arranged on the partition; an alloy block 11 is inlaid on the front end surface of the bracket 5, and an elastic element II8 (a spring II is sleeved on the bolt II) is provided on the rear end surface of the aligning bracket 5 on the rear plate. Figure 1 、 Figure 2 shown.

[0025] The dial gauge 2 is mounted on the front plate through a locking mechanism 16. The measuring rod 2-1 of the dial gauge 2 passes through the front plate backward and contacts the alloy block 11 on the front end surface of the bracket 5. The spring II of the elastic element II8 is pre-tightened between the rear end surface of the bracket 5 and the rear plate. Figure 1 、 Figure 2 shown.

[0026] The micrometer head 1 is installed in the mounting hole II of the rear plate. The micrometer screw 1-1 of the micrometer head 1 passes through the rear plate forward. An elastic element I7 (a spring I is sleeved on the bolt I) is provided on the front plate in correspondence with the micrometer screw 1-1. Figure 1 、 Figure 2 shown.

[0027] The lever mechanism includes a lever 6 horizontally arranged between the front and rear plates in the left and right directions, the rod body of the lever 6 is at the rear side of the bracket 5, and the right end of the lever 6 is hinged to the right plate, and its hinge structure includes a vertical spring piece II13 (obliquely placed to the rear left), one end of the spring piece II13 is installed on the right plate through a spring seat II15, and the other end of the spring piece II13 is installed on the rear side of the right end of the lever 6 through a spring seat I14; the left end of the lever 6 is placed between the micrometer screw rod 1-1 and the elastic element I7, and the spring I of the elastic element I7 is pre-tightened between the front plate and the lever 6, and the micrometer screw rod 1-1 is in contact with the steel ball 12 embedded in the rear side of the lever 6, as shown Figure 1 、 Figure 2 shown.

[0028] A knob 9 is coaxially mounted on the rear end surface of the lever 6 and the measuring rod 2-1. An eccentric steel ball 10 is provided on the knob 9. The lever 6 forms a point support contact with the bracket 5 through the steel ball 10. Figure 3 shown.

[0029] The lever ratio of the lever 6 = L / l, where L is the length of the active arm of the lever 6, i.e., the distance from the pressing end of the micrometer screw 1-1 to the hinge point, and l is the length of the driven arm of the lever 6, i.e., the distance from the point support (steel ball 10) to the hinge point.

[0030] The operation mode of the utility model is:

[0031] Turn the micrometer head 1 to screw in the micrometer screw 1-1, and adjust the lever ratio (turn the knob 9 to adjust the position height of the steel ball 10) to realize the indication detection of the micrometer 2 (the compression amount of the measuring rod 2-1 is obtained by reading)

[0032] Specifically: by adjusting the lever ratio, when the micrometer screw 1-1 of the micrometer head 1 moves 0.01mm, an output displacement of 0.0005mm can be generated on the measuring rod 2-1 of the micrometer 2, thereby realizing accurate detection of the indication error of the micrometer 2.

Claims

1. A micrometer inspection fixture, comprising a micrometer head (1) and a micrometer (2), characterized in that: On the same horizontal plane, the micrometer (2) and the micrometer head (1) facing each other are installed in a front-to-back staggered manner; The micrometer (2) is provided with a bracket (5) mounted on the front and rear vertical spring pieces I (4), and the bracket (5) is provided with a left and right horizontal lever (6); One end of the lever (6) is hinged, and the front side of the other end of the lever (6) is provided with an elastic element I (7) to press the lever (6) backward onto the micrometer screw (1-1) of the micrometer head (1); The rear side of the bracket (5) is provided with an elastic element II (8) to press the bracket (5) forward onto the measuring rod (2-1) of the dial gauge (2); The bracket (5) is pressed forward on the lever (6) through point support; The active arm length of the lever (6) is the distance from the pressing end of the micrometer screw (1-1) to the hinge point, and the driven arm length of the lever (6) is the distance from the point support to the hinge point.

2. The micrometer inspection fixture according to claim 1, characterized in that: An alloy block (11) in contact with a measuring rod (2-1) of a micrometer (2) is embedded on the bracket.

3. The micrometer inspection fixture according to claim 1, characterized in that: A steel ball (12) in contact with the micrometer screw (1-1) of the micrometer head (1) is embedded in the lever (6).

4. The dial gauge detection fixture according to any one of claims 1 to 3, characterized in that: The point support comprises a knob (9) mounted on a lever (6), and an eccentric steel ball (10) is provided on the knob (9).

5. The dial gauge detection fixture according to any one of claims 1 to 3, characterized in that: The hinge structure at one end of the lever (6) comprises a spring sheet II (13) obliquely mounted on the lever (6) via a spring seat I (14).

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