Combined shaft diameter detection ruler
By designing a combined shaft diameter measuring gauge, which uses an arc plate and connecting plate structure, and combines a fixed probe shaft, dial indicator and support shaft, the problems of cumbersome operation of traditional outside micrometers and high cost of large-size micrometers are solved, and efficient and accurate inspection of large-size shaft parts is achieved.
Patent Information
- Application Number
- CN202520603520.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-04-02
AI Technical Summary
Traditional outside micrometers are cumbersome to operate, inefficient, and large-size micrometers are expensive, heavy, and prone to errors, making them difficult to efficiently inspect large-size shaft parts.
Design a combined shaft diameter measuring gauge, which adopts an arc plate and connecting plate structure, combined with a fixed probe shaft, dial indicator and support shaft, and achieves quick adjustment by locking bolts and nuts. Use carbon fiber sheet to reduce weight and cost.
It improves detection efficiency, ensures detection accuracy, reduces operational difficulty and cost, and is suitable for measuring large-sized parts.
Smart Images
Figure CN223966009U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of inspection tools, and in particular to a combined shaft diameter measuring ruler. Background Technology
[0002] Before a product leaves the factory, its dimensions, accuracy, and other parameters must be inspected. Only products that pass the inspection can be shipped. For shaft parts, the outer diameter is one of the essential parameters that must be inspected. Traditionally, an outside micrometer is used to inspect the outer diameter of shaft parts. This traditional method is cumbersome and relatively inefficient. Furthermore, when measuring shaft parts with larger diameters, a large-size outside micrometer is required. However, large-size outside micrometers are relatively expensive, heavy, and prone to errors during operation.
[0003] Therefore, a method or apparatus is needed to solve the above problems. Summary of the Invention
[0004] This invention addresses the aforementioned shortcomings of existing technologies by proposing a combined shaft diameter measuring ruler that is simple in structure, ingeniously designed, rationally laid out, lightweight, and easy to operate, thereby improving detection efficiency while ensuring detection accuracy.
[0005] The technical solution of this utility model is: a combined shaft diameter measuring ruler, characterized in that: the measuring ruler includes an arc-shaped ruler body, the ruler body includes two parallel arc-shaped plates 1, and the two arc-shaped plates 1 are fixedly connected into an integral structure by multiple equally spaced connecting plates 2.
[0006] The ruler body has end positioning mounting plates 3 at both ends and a middle positioning mounting plate 4 in the middle. The end positioning mounting plates 3 have three equally spaced first positioning holes 5, and the middle positioning mounting plate 4 has two symmetrically distributed second positioning holes.
[0007] A fixed probe shaft 7 is inserted into the first positioning hole 5 on the end positioning mounting plate 3 at one end, and a dial indicator 8 is connected to the first positioning hole 5 on the other end positioning mounting plate 3. A support shaft 9 is threaded into the second positioning hole, and a fastening nut 10 is threaded onto the support shaft 9.
[0008] The end positioning mounting plate 3 has three locking holes 11 on its side wall. These three locking holes 11 correspond one-to-one with the three first positioning holes 5 and are perpendicular to each other. Locking bolts 12 are threaded into the locking holes 11. The ends of the locking bolts 12 are rotatably connected to the locking blocks 13. The locking blocks 13 are movably connected in the locking holes 11. At the same time, the locking blocks 13 are provided with arc-shaped locking parts 14, which correspond to the locking notches opened on the first positioning holes 5.
[0009] After the probe shaft 7 and dial indicator 8 are respectively installed and fixed on the two end positioning mounting plates 3, the axis of the probe shaft 7 is fixed so that it is coplanar with the axis of the probe of the dial indicator 8.
[0010] Both the arc-shaped plate 1 and the connecting plate 2 are carbon fiber plates.
[0011] Compared with the prior art, this utility model has the following advantages:
[0012] This modular shaft diameter measuring gauge features a simple structure, ingenious design, and rational layout. Addressing the problems of traditional external diameter measuring devices and methods, it employs a unique structure that eliminates the need for adjustments during each measurement, unlike micrometers. Operation is simple: the curved gauge body is attached to the outside of the shaft being measured. This ease of use significantly improves work efficiency. Furthermore, the use of carbon fiber for the curved plates and connecting plates makes it lightweight and cost-effective. This allows for the measurement of large-sized parts while maintaining quality control, reducing operator workload and inspection difficulty, thus ensuring accuracy and quality. Its simple manufacturing process and low production cost further enhance its advantages, making it particularly suitable for widespread application in this field, with a promising market prospect. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model.
[0014] Figure 2 This is a front view of an embodiment of the present utility model.
[0015] Figure 3 This is a top view of an embodiment of the present utility model.
[0016] Figure 4 This is a cross-sectional view of the end positioning mounting plate portion in an embodiment of this utility model. Detailed Implementation
[0017] The specific embodiments of this utility model will be described below with reference to the accompanying drawings. Figures 1 to 4 As shown: A combined shaft diameter measuring ruler, comprising an arc-shaped ruler body, the ruler body comprising two parallel arc-shaped plates 1, the two arc-shaped plates 1 being fixedly connected as a single unit by multiple equally spaced connecting plates 2.
[0018] The ruler body has end positioning mounting plates 3 at both ends and a middle positioning mounting plate 4 in the middle. The end positioning mounting plates 3 have three equally spaced first positioning holes 5, and the middle positioning mounting plate 4 has two symmetrically distributed second positioning holes.
[0019] A fixed probe shaft 7 is inserted through the first positioning hole 5 on the end positioning mounting plate 3 at one end, and a dial indicator 8 is connected to the first positioning hole 5 on the other end positioning mounting plate 3. A support shaft 9 with external threads is movably connected in the second positioning hole. Two fastening nuts 10 are threadedly connected to the support shaft 9, and the two fastening nuts 10 are located on the upper and lower sides of the middle positioning mounting plate 4, respectively.
[0020] The end positioning mounting plate 3 has three locking holes 11 on its side wall. These three locking holes 11 correspond one-to-one with the three first positioning holes 5 and are perpendicular to each other. Locking bolts 12 are threaded into the locking holes 11. The ends of the locking bolts 12 are rotatably connected to the locking blocks 13. The locking blocks 13 are movably connected in the locking holes 11. At the same time, the locking blocks 13 are provided with arc-shaped locking parts 14, which correspond to the locking notches opened on the first positioning holes 5.
[0021] After the probe shaft 7 and dial indicator 8 are respectively installed and fixed on the two end positioning mounting plates 3, the axis of the probe shaft 7 is fixed so that it is coplanar with the axis of the probe of the dial indicator 8.
[0022] Both the arc-shaped plate 1 and the connecting plate 2 are carbon fiber plates.
[0023] The working process of the combined shaft diameter measuring ruler of this utility model embodiment is as follows: When it is necessary to measure the outer diameter of a shaft part 15 of a certain specification, the measuring ruler first needs to be calibrated. Take a standard shaft part 15 and place the measuring ruler on the standard shaft part 15. When placed, the bottom end of the support shaft 9 at the top is in contact with the outer wall of the standard shaft part 15, the end of the fixed probe shaft 7 is in contact with the outer wall of the standard shaft part 15, and the probe of the dial indicator 8 is also in contact with the outer wall of the standard shaft part 15. Then, zero the dial indicator 8 and the calibration work is completed.
[0024] When measuring the shaft part 15, simply place the ruler on the shaft part 15, with the ends of the two fixed probe shafts and the two support shafts in contact with the surface of the part. Then observe the reading of the dial indicator 8. If the reading is within the allowable deviation range, it means that the outer diameter of the shaft part 15 meets the requirements; otherwise, it means that it does not meet the requirements.
[0025] In actual operation, the relative positions between the support shaft 9 and the ruler body, as well as the relative positions between the fixed side shaft 7 and the ruler body, can be adjusted as needed to accommodate different specifications of the shaft parts 15 being measured.
[0026] When it is necessary to adjust the support shaft 9, rotate the support shaft 9 to adjust the relative position between the support shaft 9 and the middle positioning mounting plate 4. After adjusting appropriately, tighten the fastening nut 10 to secure the support shaft 9 to the middle positioning mounting plate 4.
[0027] When it is necessary to adjust the fixed probe shaft 7, use a screwdriver or other tools to drive the locking bolt 12 to rotate. The locking bolt 12 will drive the locking block 13 to move in the locking hole 11, thereby moving the arc-shaped locking part 14 on the locking block 13 away from the fixed probe shaft 7 located in the first positioning hole 5. After the fixed probe shaft 7 is unrestrained, the operator can drive it to move in the first positioning hole 5. After adjusting to the appropriate position, rotate the locking bolt 12 in the opposite direction. The locking block 13 moves in the opposite direction, and the arc-shaped locking part 14 on it is pressed against the outer wall of the fixed probe shaft 7 again, thus fixing the fixed probe shaft 7.
[0028] The relative position between the dial indicator 8 and the scale body can also be adjusted in the same way.
[0029] It should be noted that in actual work, the measurement of shaft parts 15 with steps may be encountered. In this case, the fixed probe shaft 7 or dial indicator 8 can be connected to the appropriate first positioning hole 5 to make way for the step part, thereby avoiding the measurement interference point.
Claims
1. A combined shaft diameter measuring ruler, characterized in that: The measuring ruler includes an arc-shaped body, which comprises two parallel arc-shaped plates (1). The two arc-shaped plates (1) are fixedly connected as a single unit by multiple equally spaced connecting plates (2). The ruler body is provided with end positioning mounting plates (3) at both ends, and a middle positioning mounting plate (4) is provided in the middle of the ruler body. The end positioning mounting plate (3) is provided with three equally spaced first positioning holes (5), and the middle positioning mounting plate (4) is provided with two symmetrically distributed second positioning holes. A fixed probe shaft (7) is inserted through the first positioning hole (5) on the end positioning mounting plate (3) at one end, and a dial indicator (8) is connected to the first positioning hole (5) on the end positioning mounting plate (3) at the other end. A support shaft (9) is threaded into the second positioning hole, and a fastening nut (10) is threaded onto the support shaft (9). The end positioning mounting plate (3) has three locking holes (11) on its side wall. These three locking holes (11) correspond one-to-one with the three first positioning holes (5) and are perpendicular to each other. The locking holes (11) are internally threaded with locking bolts (12). The end of the locking bolts (12) is rotatably connected to the locking block (13). The locking block (13) is movably connected in the locking holes (11). At the same time, the locking block (13) is provided with an arc-shaped locking part (14). The arc-shaped locking part (14) corresponds to the locking notch opened on the first positioning hole (5). After the probe shaft (7) and dial indicator (8) are installed on the two end positioning mounting plates (3) respectively, the axis of the probe shaft (7) is coplanar with the axis of the probe of the dial indicator (8).
2. The combined shaft diameter measuring ruler according to claim 1, characterized in that: Both the arc-shaped plate (1) and the connecting plate (2) are carbon fiber plates.