Vernier straight rod ruler measuring device for wide-range inner hole

Abstract

The utility model relates to a vernier straight rod ruler measuring device for a wide-range inner hole, and belongs to the technical field of object dimension measurement. According to the technical scheme, one end of a ruler frame (1) is provided with a ruler frame cover plate (2) and a vernier scale (8), and the other end is provided with a second measuring head (9); one end of the main ruler body (5) is provided with a measuring head I (6), and the other end of the main ruler body (5) is slidably arranged in a space formed by the ruler frame (1), the ruler frame cover plate (2) and the vernier (8); a spring shaping rod (10) is arranged in the ruler frame (1), and a spring (11) is sleeved on the spring shaping rod (10); the main ruler body (5) is provided with a cavity (21), the spring shaping rod (10) and the spring (11) are both arranged in the cavity of the main ruler body (5), and the spring (11) moves through stretching and retracting of the main ruler body (5). The beneficial effects of the utility model are that the device is high in measurement precision, is wide in measurement range, can rapidly deal with the switching of measurement of different sizes, and improves the measurement work efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vernier straight ruler measuring device of a large range inner hole, especially hot rolling large rolling mill frame size ranging and large coupling inner diameter measurement, is applicable to the precision measurement of data measurement in production and manufacturing process and the wear size of cooperation surface in operation of hot rolling large rolling mill parts, belongs to object size measurement technical field. BACKGROUND

[0002] In the equipment operation, hot rolling large rolling mill frame and coupling flat hole equipment part are impacted and assembled by friction, leading to the size wear change of rolling mill cooperation part, according to equipment management, the size change trend is accurately tracked, and the preparation work of size precision repair is well done, the equipment precision size deterioration tendency is mastered, and the size change needs to be measured regularly.

[0003] Generally, the precision size measuring tool is: vernier caliper, inner diameter dial gauge, inner diameter micrometer, caliper and straight ruler. In the conventional measuring tool, the measuring range of inner diameter dial gauge and inner diameter micrometer is limited, the measuring precision is greatly influenced by environmental factors, the operation is complex, and the maintenance cost is higher, the vernier caliper is limited by the length of measuring claw, cannot flexibly cover the size measurement, is suitable for smaller size parts, and the measuring precision of caliper and straight ruler is millimeter level, relative to the machining precision requirement 0.02mm of the measured object, the measuring precision of caliper is 1mm, and the precision requirement of the measured object cannot be met. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a vernier straight ruler measuring device of a large range inner hole, which can realize high measuring precision, wide measuring range and quick switching of different size measurements, and improve the measuring efficiency, thereby solving the problems in the background technology.

[0005] The technical scheme of the utility model is:

[0006] A vernier straight ruler measuring device of a large range inner hole, comprising a ruler frame, a ruler frame cover plate, a main ruler body, a vernier ruler, a spring shaping rod and a spring, one end of the ruler frame is provided with the ruler frame cover plate and the vernier ruler, and the other end is provided with two measuring heads; one end of the main ruler body is provided with a measuring head, and the other end is slidably arranged in the space formed by the ruler frame, the ruler frame cover plate and the vernier ruler; the spring shaping rod is arranged in the ruler frame, and the spring is arranged on the spring shaping rod; the main ruler body is provided with a cavity, and the spring shaping rod and the spring are arranged in the cavity of the main ruler body, and the spring is moved by the extension and contraction of the main ruler body.

[0007] The top of the main ruler body is provided with a limiting screw sliding groove, one end of the ruler frame is provided with a limiting hole, a limiting screw is arranged in the limiting hole, and the limiting screw is slidably arranged in the limiting screw sliding groove.

[0008] The standard gauge is arranged between the frame and the measuring head, and the size of the standard gauge is different, so that the measuring range can be enlarged or reduced by switching and combination.

[0009] Screw holes and studs are arranged at two ends of the standard gauge, and the standard gauge is connected with the measuring head and the frame through the screw holes and the studs.

[0010] The main ruler body is provided with a push block, and the push block is pressed to the frame side by the staff.

[0011] The spring shaping rod is provided with a positioning rod taper head at one end and is fixedly connected with the other end of the frame.

[0012] The other end of the main ruler body is provided with a spring groove, the spring groove is communicated with the cavity, the cross section of the spring groove is trapezoidal, and the inner diameter of the end of the spring groove away from the cavity is larger than the inner diameter of the cavity.

[0013] The other end of the spring shaping rod is provided with a threaded hole, and the other end of the frame is threadedly connected with the stud of the measuring head or the standard gauge through the threaded hole of the spring shaping rod.

[0014] One end of the spring is connected with the inner wall of one end of the main ruler body, and the other end is connected with the other end of the frame.

[0015] The main ruler body and the frame are fixedly connected through a fixing screw, and the vane cover plate and the vernier are fastened on the frame through a screw.

[0016] In use, the utility model is inserted into the inner hole of the measured object, the measuring head one and the measuring head two of the utility model are shaken up and down, the relative change of the scale line on the main ruler body and the scale line two (0 scale line) of the vernier is observed, the scale line on the main ruler body changes to a large value to the left, and the scale line on the main ruler body changes to the minimum value to the right; when the minimum value is measured, the fixing screw is screwed to lock the main ruler body, the utility model is taken out from the inner hole of the measured object, and the value is read according to the position of the scale line.

[0017] The utility model has the advantages of high measuring precision, wide measuring range, quick response to the switching of different size measurements, and improved measuring work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structural schematic view of the utility model;

[0019] Figure 2 It is a structural schematic view of the utility model; Figure 1

[0020] Figure 3 It is a structural schematic view of the utility model; ​

[0021] Figure 4 Figure 2 is a use state schematic view of the utility model;

[0022] Figure 5 Figure 1 is a schematic view of the utility model; Figure 4 Figure 2 is a use state schematic view of the utility model;

[0023] In the figure: ruler frame 1, ruler frame cover plate 2, screw 3, fixed screw 4, main ruler body 5, measuring head one 6, push block 7, vernier 8, measuring head two 9, spring shaping rod 10, spring 11, standard gauge block 12, limiting screw 13, limiting screw sliding slot 14, positioning rod taper head 15, spring groove 16, threaded connection 17, screw hole 18, stud 19, measured object 20, cavity 21, limiting hole 22, scale line one 23, scale line two 24. DETAILED DESCRIPTION

[0024] The utility model is further described below by examples in connection with the drawings.

[0025] A large range inner hole vernier straight ruler measuring device, contain ruler frame 1, ruler frame cover plate 2, main ruler body 5, vernier 8, spring shaping rod 10 and spring 11, the ruler frame 1 one end installs ruler frame cover plate 2 and vernier 8, the other end installs measuring head two 9, main ruler body 5 one end installs measuring head one 6, the other end is slidably arranged in the space formed by ruler frame 1 and ruler frame cover plate 2 and vernier 8, the inside of the ruler frame 1 is equipped with spring shaping rod 10, and spring 11 is sleeved on spring shaping rod 10, and main ruler body 5 is equipped with cavity 21, and spring shaping rod 10 and spring 11 are all arranged in the cavity of main ruler body 5, and spring 11 is moved by the extension of main ruler body 5.

[0026] The top of main ruler body 5 is equipped with limiting screw sliding slot 14, one end of ruler frame 1 is equipped with limiting hole 22, limiting screw 13 is arranged in limiting hole, and limiting screw 13 is slidably arranged in limiting screw sliding slot 14.

[0027] Standard gauge block 12 is arranged between ruler frame 1 and measuring head two 9, the size of standard gauge block 12 is different, and the increase and reduction of the measurement range can be realized by switching and combination.

[0028] Screw hole 18 and stud 19 are respectively arranged at the two ends of standard gauge block 12, and standard gauge block 12 is connected with measuring head two 9 and ruler frame 1 through screw hole 18 and stud 19 respectively.

[0029] Push block 7 is arranged on main ruler body 5, and staff press main ruler body 5 to ruler frame 1 side through push block 7.

[0030] The one end of spring shaping rod 10 is equipped with positioning rod taper head 15, and the other end is fixedly connected with the other end of ruler frame 1.

[0031] The other end of the main ruler body 5 is provided with a spring groove 16, the spring groove 16 is communicated with the cavity, the cross section of the spring groove 16 is trapezoidal, and the inner diameter of the other end of the spring groove 16 is greater than the inner diameter of the cavity.

[0032] The other end of the spring shaping rod 10 is provided with a threaded hole, and the other end of the ruler frame 1 is screwed with the threaded hole of the spring shaping rod 10 and the threaded connection of the screw rod 19 of the measuring head two 9.

[0033] One end of the spring 11 is connected with the inner wall of one end of the main ruler body 5, and the other end is connected with the other end of the ruler frame 1.

[0034] The main ruler body 5 and the ruler frame 1 are fixedly connected through the fixing screw 4, and the ruler frame cover plate 2 and the vernier 8 are fastened on the ruler frame 1 through the screw 3.

[0035] The installation process of the utility model is as follows:

[0036] The spring shaping rod 10 is screwed on the ruler frame 1, after screwing, the threaded connection 17 is spot welded with the ruler frame 1 and is loosened, and the welding spot is polished flat; the spring 11 is installed on the spring shaping rod 10, the ruler frame cover plate 2 and the vernier 8 are installed on the ruler frame 1, and the ruler frame cover plate 2 and the vernier 8 are fastened on the ruler frame 1 through the screw 3; the main ruler body 5 is put into the spring 11 and is inserted into the ruler frame 1 with force, when the end of the limiting screw sliding groove 14 passes through the limiting hole, the limiting screw 13 is screwed in, and the stop position of the outward sliding of the main ruler body 5 is formed; the measuring head one 6 is screwed at one end of the main ruler body 5, and the measuring head two 9 is screwed on the spring shaping rod 10, and the assembly of the utility model is completed.

[0037] One end of the standard gauge block 12 is a screw rod 19, and the other end is a threaded hole 18; by screwing the measuring head two 9 in the Figure 1 down, the screw rod 19 of the standard gauge block 12 is screwed on the spring shaping rod 10 in the Figure 1 , and then the measuring head two 9 is screwed on the threaded hole 18 of the standard gauge block 12; through the above operation, the standard gauge block 12 in the Figure 3 L=100mm, L=200mm, L=300mm, L=500mm can be switched and combined to realize the increase and reduction of the measurement range, and finally the measurement range of 150-1000mm is realized.

[0038] Before use, first, the utility model is calibrated, a 150mm outer diameter micrometer is selected as a calibration rule, the main ruler body 5 is pressed to the ruler frame 1 side through the push block 7, the utility model is put into the 150mm outer diameter micrometer, the scale line one 23 on the main ruler body 5 is aligned with the scale line two 24 (0 scale line) of the vernier 8, and the calibration error is 0; when the calibration error value appears, the calibration is carried out in time by replacing the measuring head one and the measuring head two 9.

[0039] In this embodiment, referring to the accompanying Figure 4 After assembling with the standard gauge block 12 of L=100mm, the utility model is inserted into the inner hole of the measured object 20, the minimum size of the inner hole of the measured object 20 is measured, the measuring head one 6 and the measuring head two 9 of the utility model are shaken up and down, the relative change of the scale line on the main ruler body 5 and the scale line two 24 (0 scale line) of the vernier 8 is visually observed, the scale line on the main ruler body 5 changes to a large value to the left, and the scale line on the main ruler body 5 changes to the minimum value to the right; when the minimum value is measured by shaking the utility model up and down, the fixed screw 4 is screwed to lock the main ruler body 5, the utility model is taken out from the inner hole of the measured object 20, and the value is read according to the position of the scale line alignment; the precision method of reading the value and the manufacturing precision of the utility model are both the national standard vernier caliper GB1214-85.

[0040] The elastic telescopic structure of the utility model can also be applied to other verniers, and can realize more accurate reading mode of the pointer dial and digital display.

[0041] The utility model adopts the change principle structure of the depth ruler reference 0 position, is used for measuring the inner hole size object of >150mm, the range is 100mm, through increasing and decreasing 100mm, 200mm, 300mm, 500mm standard gauge block, the measurement range of the utility model is 150-1000mm;The range is 100mm, the range is 150-1000mm, the precision is 0.02mm vernier straight bar straight bar structure, can realize high measurement accuracy, wide measurement range, and can quickly respond to the switching of different size measurements;It provides convenience for data measurement in the production and manufacturing process and accuracy re-measurement in operation.

[0042] The utility model adopts the working principle of vernier caliper, realizes the ruler structure through design and manufacture, realizes measurement value reading through the main ruler body telescoping, adjusts the measurement range of the utility model through standard gauge block replacement, and is used for the measurement operation of the inner hole article;Can reach high measurement accuracy, wide measurement range;Can quickly respond to the switching of different size measurements;It provides convenience for data measurement in the production and manufacturing process and accuracy re-measurement in operation;Solve the problem of low measurement efficiency, solve the problem that the vernier caliper is limited by the length of the measurement claw, cannot flexibly fully cover the measurement size and the low measurement accuracy of the caliper and the straight ruler.

Claims

1. A vernier straight bar gauge for measuring a large range of bores, characterized in that: The utility model provides a kind of vernier caliper, including ruler frame (1), ruler frame cover plate (2), main ruler body (5), vernier (8), spring shaping rod (10) and spring (11), the ruler frame (1) one end installs ruler frame cover plate (2) and vernier (8), the other end installs measuring head two (9);Main ruler body (5) one end installs measuring head one (6), the other end is slidably arranged in the space formed by ruler frame (1) with ruler frame cover plate (2) and vernier (8);The ruler frame (1) is internally provided with spring shaping rod (10), spring (11) is sleeved on spring shaping rod (10);Main ruler body (5) is provided with cavity (21), and spring shaping rod (10) and spring (11) are all arranged in the cavity of main ruler body (5), and spring (11) is moved by the expansion of main ruler body (5).

2. A vernier straight bar gauge for measuring the length of an internal bore of a workpiece according to claim 1, wherein: The main ruler body (5) top is equipped with limit screw sliding slot (14), and the ruler frame (1) one end is equipped with limit hole (22), and the limit hole is equipped with limit screw (13), and the limit screw (13) is slidably arranged in the limit screw sliding slot (14).

3. A Vernier straight bar gauge for measuring the internal diameter of a bore of a large range according to claim 1 or 2, characterised in that: The standard gauge block (12) is arranged between the ruler frame (1) and the measuring head two (9).

4. A Vernier straight bar gauge for measuring the length of an internal bore of a workpiece according to claim 3, wherein: The standard gauge block (12) both ends are equipped with screw hole (18) and stud (19) respectively, and the standard gauge block (12) is connected with the measuring head two (9) and the ruler frame (1) through screw hole (18) and stud (19) respectively.

5. A vernier straight bar gauge for measuring the internal diameter of a bore of a large range according to claim 1 or 2, characterised in that: The main ruler body (5) is equipped with push block (7).

6. A vernier straight bar gauge for measuring the internal diameter of a bore of a large range according to claim 1 or 2, characterised in that: The spring shaping rod (10) one end is equipped with positioning rod taper head (15), and the other end is fixedly connected with the other end of the ruler frame (1).

7. A vernier straight bar gauge for measuring the internal diameter of a bore of a large range according to claim 1 or 2, characterised in that: The other end of the main ruler body (5) is equipped with spring groove (16), and the spring groove (16) is communicated with the cavity, the cross section of the spring groove (16) is trapezoidal, and the inner diameter of the end of the spring groove (16) away from the cavity is greater than the inner diameter of the cavity.

8. A Vernier straight bar gauge for measuring the length of an internal bore of a workpiece according to claim 4, wherein: The other end of the spring shaping rod (10) is equipped with screw hole, and the other end of the ruler frame (1) is threadedly connected with the stud (19) of the measuring head two (9) or the standard gauge block (12) through the screw hole of the spring shaping rod (10).

9. A Vernier straight bar gauge for measuring the internal diameter of a bore of a wide range of sizes according to claim 1 or 2, characterised in that: The spring (11) one end is connected with the inner wall of the one end of the main ruler body (5), and the other end is connected with the other end of the ruler frame (1).

10. A vernier straight bar gauge for measuring the internal diameter of a bore of a large range according to claim 1 or 2, characterised in that: The main ruler body (5) and the ruler frame (1) are fixedly connected through fixed screw (4), and the ruler frame cover plate (2) and the vernier (8) are fastened on the ruler frame (1) through screw (3).

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