Large-size ring groove diameter measuring device

Abstract

The utility model provides a large-size ring groove diameter measuring device which comprises a micrometer rod, one end of the micrometer rod is fixedly connected with one end of a range extending rod, the other end of the range extending rod is fixedly connected with a first positioner, the other end of the micrometer rod is in threaded connection with a micrometer cylinder, a plurality of main scale marks are arranged on the outer circumferential face of the micrometer cylinder at equal intervals in the axial direction, and the main scale marks are arranged on the outer circumferential face of the micrometer cylinder. All the main scale marks are sequentially marked according to a natural number increasing sequence starting from zero, the micrometer tube is further fixedly connected with the second positioner, and a level bubble is arranged in the range extending rod. According to the technical scheme of the utility model, when characteristic elements such as a groove and an annular groove of a part to be measured are clamped between the first positioner and the second positioner, an operator can directly read, and the range extending rod is arranged to increase the measurement range of the micrometer. In addition, the operator can observe the level bubble on the range extending rod through naked eyes to identify whether the range extending rod is in a horizontal posture or not, reading is carried out when the range extending rod is in the horizontal posture, the measurement precision is improved, and the measurement reading reliability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring devices, in particular to a large-size ring groove diameter measuring device. Background Art

[0002] In the manufacturing industry, to ensure the manufacturing quality of components, it is necessary to measure the various shape features of the components. In the existing technology, when measuring features such as grooves and annular grooves on components, the following measurement methods are generally used: First, indirect measurement using vernier calipers and contour ring gauges. Due to the low precision of ordinary vernier calipers and the unstable placement of contour ring gauges, this measurement method not only results in large measurement errors but also easily causes inaccurate measurements. Second, due to the structural characteristics of parts, the measured dimensions vary greatly, requiring a large number of common measuring tools. Third, indirect measurement using three-dimensional coordinate machine tools requires operators to possess considerable measurement technology, measurement methods, and measurement skills. Not only is the operation time too long, but the cost of three-dimensional coordinate machine tools is also high, making it unaffordable for some small and medium-sized enterprises and the hardware investment cost is high. Therefore, in order to quantitatively measure the values ​​of feature features such as grooves and annular grooves on components, it is urgent to design and develop a multifunctional measuring device.

[0003] For example, the patent document with the announcement number "CN210400246U" discloses a multifunctional measuring device, including a micrometer screw, one end of which is fixedly connected to a movable measuring arm, a cylindrical measuring head A is installed at the end of the movable measuring arm, a fixed measuring arm is mounted in the middle of the micrometer screw, a cylindrical measuring head B is installed at the end of the fixed measuring arm, and a fixed sleeve is threaded on the other end of the micrometer screw. The outer peripheral surface of the fixed sleeve is provided with m main scale lines arranged at equal intervals along its axial direction, and all main scale lines are sequentially marked in an increasing sequence of natural numbers from 0 to m. This patented technical solution increases the measuring range of the existing micrometer by setting up a fixed measuring arm and a movable measuring arm, so that it can clamp the grooves, ring grooves and other characteristic elements of the component to be measured through the measuring head A and the measuring head B, and directly read the diameter size of the grooves, ring grooves and other characteristic elements, and its measurement accuracy can reach 0.001mm. However, when measuring large-sized workpieces, the distance between the fixed measuring arm and the movable measuring arm increases significantly, and the length direction of the fixed measuring arm or the movable measuring arm is not easy to maintain in the vertical direction. It is difficult for the operator to identify the posture error of the fixed measuring arm or the movable measuring arm with the naked eye, which affects the operator's reading and causes a reduction in measurement accuracy. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a large-size ring groove diameter measuring device.

[0005] The utility model is achieved through the following technical solutions.

[0006] The utility model provides a large-size annular groove diameter measuring device, comprising a micrometer rod, one end of the micrometer rod being fixedly connected to one end of a range-extending rod, the other end of the range-extending rod being fixedly connected to a first positioner, the other end of the micrometer rod being screwed to a micrometer tube, a plurality of main scale lines arranged at equal intervals along the axial direction of the micrometer tube being provided on the outer circumference thereof, all the main scale lines being sequentially marked in an increasing sequence of natural numbers starting from zero, the micrometer tube being further fixedly connected to the second positioner, and a level bubble being built into the range-extending rod.

[0007] The first positioner or the second positioner includes a positioning arm and a probe, one end of the positioning arm is fixedly connected to the range extending rod or the micrometer cylinder, the other end of the positioning arm is screwed to one end of the probe, and the other end of the probe extends outward.

[0008] The positioning arm and the range extender rod are fixedly connected together by using a cylindrical pin or welding.

[0009] The large-size annular groove diameter measuring device further includes at least one pair of equal-height blocks, which are padded below the range-extending rod.

[0010] The main scale line is divided into 1mm divisions.

[0011] The micrometer cylinder is also threadedly connected to the differential cylinder. A plurality of secondary scale lines are arranged at equal intervals along the circumference of the differential cylinder. All secondary scale lines are marked in sequence according to an increasing sequence of natural numbers starting from zero. When the first locator and the second locator are placed together, the edge of the differential cylinder is flush with the main scale line marked with zero.

[0012] The number of the secondary scale lines is 50.

[0013] The pitch of the thread of the screw connection between the micrometer cylinder and the differential cylinder is 0.5 mm.

[0014] The micrometer cylinder is also provided with a locking device, which is used to limit the axial position of the micrometer cylinder relative to the micrometer rod.

[0015] A force measuring device is also installed at the end of the micrometer rod, and the force measuring device is used to apply a force to the micrometer cylinder along the axial direction of the micrometer rod.

[0016] The beneficial effect of the present invention is that: when the technical solution of the present invention is adopted, the groove, annular groove and other characteristic elements of the component to be measured are clamped between the first locator and the second locator, the operator can directly read the diameter size value of the groove, annular groove and other characteristic elements, and the measurement accuracy can reach 0.001mm. Compared with the existing technology, the provision of the range extender increases the measuring range of the micrometer. When measuring large-sized workpieces, the operator can observe the level bubble on the range extender with the naked eye to identify whether the range extender is in a horizontal posture, and read the reading when the range extender is in a horizontal posture, thereby improving the measurement accuracy and enhancing the reliability of the measurement readings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the main view of the present utility model.

[0018] In the figure: 1- micrometer rod, 2- range extension rod, 3- first positioner, 4- micrometer cylinder, 5- main scale line, 6- second positioner, 7- vial, 8- positioning arm, 9- probe, 10- equal height block, 11- weight reduction hole, 12- differential cylinder, 13- secondary scale line, 14- locking device, 15- force measuring device. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the described solution.

[0020] like Figure 1 As shown, the utility model provides a large-size annular groove diameter measuring device, including a micrometer rod 1, one end of the micrometer rod 1 is fixedly connected to one end of the range extending rod 2, the other end of the range extending rod 2 is fixedly connected to the first positioner 3, the other end of the micrometer rod 1 is screwed to the micrometer tube 4, and the outer circumference of the micrometer tube 4 is provided with a plurality of main scale lines 5 arranged at equal intervals along its axial direction. All main scale lines 5 are sequentially marked in an increasing sequence of natural numbers starting from zero. The micrometer tube 4 is also fixedly connected to the second positioner 6, and the range extending rod 2 is built-in with a level bubble 7.

[0021] By adopting the technical solution of the present invention, when the grooves, annular grooves and other characteristic elements of the component to be measured are clamped between the first locator and the second locator, the operator can directly read the diameter size values ​​of the grooves, annular grooves and other characteristic elements, and the measurement accuracy can reach 0.001mm. Compared with the existing technology, the provision of the range extender increases the measuring range of the micrometer. When measuring large-sized workpieces, the operator can observe the level bubble on the range extender with the naked eye to identify whether the range extender is in a horizontal posture, and read the readings when the range extender is in a horizontal posture, thereby improving the measurement accuracy and enhancing the reliability of the measurement readings.

[0022] Specifically, the first positioner 3 or the second positioner 6 includes a positioning arm 8 and a probe 9. One end of the positioning arm 8 is fixedly connected to the range extender rod 2 or the micrometer cylinder 4. The other end of the positioning arm 8 is threadedly connected to one end of the probe 9, and the other end of the probe 9 extends outward. The positioning arm 8 is fixedly connected to the range extender rod 2 using a cylindrical pin or welding. The length of the probe 9 is perpendicular to the length of the range extender rod 2.

[0023] The large-size annular groove diameter measuring device also includes at least one pair of contour blocks 10, which are inserted beneath the range extender 2. By inserting at least one pair of contour blocks between the range extender and the workpiece surface, the range extender maintains a horizontal position along its length, improving reading accuracy.

[0024] In addition, the surface of the range-extending rod 2 is provided with a plurality of weight-reducing holes 11. Thus, the utility model is easy to carry and convenient for the operator to hold.

[0025] In addition, the main scale line 5 is graduated in 1 mm. The micrometer cylinder 4 is also screwed to the differential cylinder 12. The outer peripheral surface of the differential cylinder 12 is provided with a plurality of auxiliary scale lines 13 arranged at equal intervals along its circumference. All the auxiliary scale lines 13 are sequentially marked in an increasing sequence of natural numbers starting from zero. When the first locator 3 and the second locator 6 are placed together, the edge of the differential cylinder 12 is flush with the main scale line 5 marked as zero. Preferably, the number of auxiliary scale lines 13 is 50. The pitch of the thread of the micrometer cylinder 4 screwed to the differential cylinder 12 is 0.5 mm. As a result, the measurement operation process of the present invention is consistent with the operation method of the existing micrometer, and the measurement accuracy remains consistent with the measurement accuracy of the micrometer.

[0026] Specifically, the micrometer cylinder 4 is also provided with a locking device 14, which is used to limit the axial position of the micrometer cylinder 4 relative to the micrometer rod 1. A force measuring device 15 is also mounted at the end of the micrometer rod 1, which is used to apply a force to the micrometer cylinder 4 along the axial direction of the micrometer rod 1. When the operator uses the present invention, the locking device 14 and the force measuring device 15 temporarily lock the relative positions of certain components, facilitating the operator's readings and, consequently, facilitating accurate and reliable readings.

Claims

1. A large-size ring groove diameter measuring device, characterized by: The invention comprises a micrometer rod (1), one end of the micrometer rod (1) is fixedly connected to one end of a range extending rod (2), the other end of the range extending rod (2) is fixedly connected to a first positioner (3), the other end of the micrometer rod (1) is screwed to a micrometer tube (4), a plurality of main scale lines (5) arranged at equal intervals along the axial direction of the micrometer tube (4) are provided on the outer peripheral surface of the micrometer tube (4), all the main scale lines (5) are sequentially marked in a natural number increasing sequence starting from zero, the micrometer tube (4) is also fixedly connected to a second positioner (6), and a level bubble (7) is built into the range extending rod (2).

2. The large-size ring groove diameter measuring device according to claim 1, characterized in that: The first positioner (3) or the second positioner (6) comprises a positioning arm (8) and a probe (9), one end of the positioning arm (8) is fixedly connected to the range-extending rod (2) or the micrometer cylinder (4), the other end of the positioning arm (8) is screwed to one end of the probe (9), and the other end of the probe (9) extends outward.

3. The large-size ring groove diameter measuring device according to claim 2, characterized in that: The positioning arm (8) and the range extending rod (2) are fixedly connected together by using a cylindrical pin or welding.

4. The large-size annular groove diameter measuring device according to any one of claims 1 to 3, characterized in that: The large-size annular groove diameter measuring device further comprises at least one pair of equal-height blocks (10), which are padded below the range-extending rod (2).

5. The large-size annular groove diameter measuring device according to claim 1, characterized in that: The main scale line (5) is graduated in 1 mm increments.

6. The large-size annular groove diameter measuring device according to claim 1, characterized in that: The micrometer cylinder (4) is also screwed to the differential cylinder (12). The outer peripheral surface of the differential cylinder (12) is provided with a plurality of secondary scale lines (13) arranged at equal intervals along its circumference. All the secondary scale lines (13) are marked in sequence according to an increasing sequence of natural numbers starting from zero. When the first locator (3) and the second locator (6) are placed together, the edge of the differential cylinder (12) is flush with the main scale line (5) marked as zero.

7. The large-size annular groove diameter measuring device according to claim 6, characterized in that: The number of the secondary scale lines (13) is 50.

8. The large-size annular groove diameter measuring device according to claim 6, characterized in that: The pitch of the thread of the micrometer cylinder (4) and the differential cylinder (12) is 0.5 mm.

9. The large-size annular groove diameter measuring device according to claim 1, characterized in that: The micrometer cylinder (4) is also provided with a locking device (14), and the locking device (14) is used to limit the axial position of the micrometer cylinder (4) relative to the micrometer rod (1).

10. The large-size annular groove diameter measuring device according to claim 1, characterized in that: A force measuring device (15) is also installed at the end of the micrometer rod (1), and the force measuring device (15) is used to apply a force to the micrometer cylinder (4) along the axial direction of the micrometer rod (1).

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