Displacement ruler for measuring inner diameter and outer diameter of steel ring

Abstract

The utility model discloses a steel ring internal and external diameter measuring displacement ruler, which comprises a display, a main ruler, a measuring rod, a reference head and a pair of extension claws, a through hole is horizontally and transversely formed in the display, the main ruler is arranged in the through hole of the display in a penetrating manner, and the display can display the reading of the main ruler; the measuring rod is detachably and fixedly arranged at the bottom end of the display, and the measuring rod and the main ruler are located on the same straight line; the reference head comprises a mounting part, a first reference part and a second reference part, the reference head is fixedly mounted at one end, far away from the measuring rod, of the main ruler through the mounting part of the reference head, and the first reference part and the second reference part are positioned on two sides of the mounting part and are parallel to the main ruler; and the two extension claws are vertically fixed at the ends, far away from each other, of the main ruler and the measuring rod respectively. The utility model has the advantages that the displacement ruler does not need to swing left and right to find the maximum point to confirm the diameter size of the inner diameter, the operation is convenient, the measurement result is accurate, the measuring range is larger, and the application range is large.

Description

Technical Field

[0001] This utility model relates to the field of steel ring measurement technology, and in particular to a displacement ruler for measuring the inner and outer diameters of steel rings. Background Technology

[0002] In the current market for measuring instruments, such as those used in the wheel industry, steel wheel processing has evolved to meet the changing market demands of various automotive industries. This includes an increase in products with special structures, non-standard products, and customized products. When measuring inner diameter dimensions, internal micrometers and calipers are commonly used. However, because internal micrometers are multi-section splices, measuring the inner circle requires calculating the number of splices and finding the maximum value. The depth of the caliper jaws is also subject to many factors, such as the dependence of the caliper on the user's own body, resulting in larger measurement errors that affect measurement accuracy and ultimately product performance. For large workpieces with special shapes, there are no simple tools for measuring the outer diameter.

[0003] In the current industry, for this dimensional inspection, there are two main methods: First, conventional digital or vernier calipers. Calipers have limited range and poor versatility; for example, those on the market are generally limited to 150, 200, 300, 50, 600, and 1000 calipers. When measuring inner diameters, the jaw length limits the measurement of product depth. Second, micrometers are used, but micrometers are made of multiple sections joined together, requiring manual calculation of the total length. When measuring inner diameters, especially for large workpieces, finding the maximum length takes time, and requires a certain level of skill and feel. Furthermore, for irregular workpieces with grooves or other irregular shapes, there are no simple tools available to measure the outer diameter of different parts.

[0004] The existing testing method, which uses calipers to measure the inner diameter of steel rings, requires swinging the calipers left and right to find the maximum or minimum point to confirm the inner diameter size. Any change in position affects the measurement data. Furthermore, the existing calipers have limited range, and when measuring large steel rings, multi-range tools or splicing and conversion are required. Improvements are needed in these areas. Utility Model Content

[0005] The purpose of this utility model is to provide a displacement gauge for measuring the inner and outer diameters of steel rings that is convenient to operate, provides accurate measurement results, and has a wide range of measurement applications.

[0006] This utility model proposes a displacement gauge for measuring the inner and outer diameters of a steel ring, comprising a display, a main scale, a measuring rod, a reference head, and a pair of extension claws. The display has a horizontally extending hole, through which the main scale passes, and the display shows the reading of the main scale. The measuring rod is detachably and fixedly mounted at the bottom of the display, and is aligned with the main scale. The reference head includes a mounting portion, a first reference portion, and a second reference portion. The reference head is fixedly mounted on the end of the main scale away from the measuring rod via its mounting portion. The first and second reference portions are located on either side of the mounting portion and are parallel to the main scale. The two extension claws are vertically fixed at the ends of the main scale and the measuring rod that are away from each other.

[0007] Preferably, an installation hole is formed in the installation part. The through direction of the installation hole is parallel to the first reference part and the second reference part. The main scale is inserted into the installation hole. An installation screw hole is formed on the surface of the installation part, and an installation bolt that abuts against the main scale is threadedly connected in the installation screw hole.

[0008] Preferably, a plurality of fixing holes are formed along the measuring rod. Fixing bolts are inserted into the fixing holes, and the measuring rod is locked and fixed to the display by the fixing bolts.

[0009] Preferably, the plurality of fixing holes are evenly distributed along the length direction of the measuring rod.

[0010] Preferably, the extension claw consists of an installation block, a vertical rod and a horizontal rod. The vertical rod and the horizontal rod form an "L" shape. The installation block is located at the top of the vertical rod. The installation block is fixed to the main scale, so that the horizontal rods of the two extension claws are arranged oppositely.

[0011] Preferably, the length dimension of the vertical rod is set as "T", and 200mm < T < 300mm. The length dimension of the horizontal rod is set as "D", and 200mm < T < 300mm.

[0012] Preferably, a limiting block is formed at one end of the main scale close to the measuring rod.

[0013] Preferably, the measuring range of the main scale is equal to the maximum measuring range of the measuring rod.

[0014] As can be seen from the above description of the present invention, the present invention has the following beneficial effects:

[0015] 1. A reference head is provided at one end of the main scale. When measuring the inner diameter of the steel ring, both the first reference part and the second reference part of the reference head are abutted against the inner side wall of the steel ring, so that the straight line where the displacement scale is located is the diameter of the steel ring; thus, there is no need to swing the displacement scale left and right to find the maximum point, the measurement operation is convenient, and the measurement result is more accurate.

[0016] 2. When using this displacement scale, the measuring rod is fixedly installed at the bottom end of the display. The measuring range of the main scale is equal to the maximum measuring range of the measuring rod, so that the measuring range of this displacement scale is twice the measuring range of the main scale. Therefore, this displacement scale has a larger measuring range; when not in use, the main scale and the measuring rod are slid in the direction of approaching each other, which can reduce the occupied space of this displacement scale and is convenient for carrying and storing this displacement scale.

[0017] 3. Extension claws are provided at one ends of the measuring rod and the main scale that are far away from each other. The horizontal rods of the two extension claws are arranged oppositely, thus solving the problem that the displacement scale is limited by depth during measurement when measuring the outer diameter of the steel ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a steel ring inner diameter measuring displacement ruler for measuring the inner diameter in an embodiment;

[0019] Figure 2 This is a schematic diagram of the structure of the display in the embodiment;

[0020] Figure 3 This is a schematic diagram of the structure of the fixing hole and fixing bolt in the embodiment;

[0021] Figure 4 This is a schematic diagram of the reference head structure in the embodiment;

[0022] Figure 5 This is a schematic diagram of the structure of a steel ring inner and outer diameter measuring displacement ruler for measuring the outer diameter in an embodiment;

[0023] Figure 6 This is a schematic diagram of the extended claw structure in the embodiment;

[0024] Figure 7 This is a schematic diagram showing the state when measuring the inner diameter of the steel ring in an embodiment;

[0025] Figure 8 This is a schematic diagram of the state when measuring the outer diameter of the steel ring in an embodiment.

[0026] Reference numerals: 1. Display; 11. Perforation; 2. Main scale; 21. Limiting block; 3. Measuring rod; 31. Fixing hole; 32. Fixing bolt; 4. Reference head; 41. Mounting part; 411. Mounting hole; 412. Mounting screw hole; 413. Mounting bolt; 42. First reference part; 43. Second reference part; 5. Extension claw; 51. Mounting block; 52. Vertical rod; 53. Horizontal rod. Detailed Implementation

[0027] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer and more understandable, the following description is provided in conjunction with the appendix. Figure 1-8 The present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0028] Reference Figure 1 and Figure 2A displacement gauge for measuring the inner and outer diameters of a steel ring includes a display 1, a main scale 2, a measuring rod 3, a reference head 4, and a pair of extension claws 5. The display 1 has a horizontally formed through-hole 11. The shape and dimensions of the vertical cross-section of the main scale 2 are the same as those of the through-hole 11. One end of the main scale 2 is inserted into the through-hole 11, allowing relative sliding between the main scale 2 and the display 1. The display 1 can display the value measured by the main scale 2. Furthermore, to prevent the main scale 2 from slipping off the display 1, a limiting block 21 is provided at the end of the main scale 2 near the measuring rod 3. When the displacement gauge is at its maximum range, the limiting block 21 on the main scale 2 abuts against one side of the display 1, thus limiting the complete sliding of the main scale 2 out of the through-hole 11.

[0029] Reference Figure 3 The measuring rod 3 is detachably fixed to the bottom of the display 1, ensuring that the measuring rod 3 and the main scale 2 are aligned on the same straight line. Several fixing holes 31 are formed along the length of the measuring rod 3, and these holes are evenly distributed along the length of the measuring rod 3. When fixing the measuring rod 3 to the display 1, fixing bolts 32 are inserted into the fixing holes 31 of the measuring rod 3 and locked to the bottom of the display 1. By changing the positions of the fixing bolts 32 on the measuring rod 3, different measuring ranges can be achieved.

[0030] By setting the maximum range of measuring rod 3 to be equal to that of main scale 2, and fixing the outermost end of measuring rod 3 to display 1, the maximum range of the displacement gauge can reach twice that of main scale 2, thus enabling the displacement gauge to measure the inner and outer diameters of large steel rings. The combined use of measuring rod 3 and main scale 2 provides the displacement gauge with a wider range of measurement capabilities. When the displacement gauge is not in use, main scale 2 can be slid closer to measuring rod 3, reducing the space occupied by the displacement gauge and making it easier to carry and store.

[0031] Reference Figure 1 and Figure 4, when it is necessary to use this displacement ruler to measure the inner diameter of the steel ring, the reference head 4 is fixedly installed at one end of the main ruler 2 away from the measuring rod 3. The reference head 4 consists of an installation part 41, a first reference part 42 and a second reference part 43. The first reference part 42 and the second reference part 43 are located on both sides of the installation part 41 and are parallel to each other. Therefore, an installation hole 411 is formed in the installation part 41, and the through direction of the installation part 41 is parallel to the first reference part 42 and the second reference part 43. When installing the reference head 4, one end of the main ruler 2 away from the measuring rod 3 is inserted into the installation hole 411, and an installation screw hole 412 is formed on the surface of the installation part 41. An installation bolt 413 is threadedly connected in the installation screw hole 412, and the end of the installation bolt 413 abuts against the main ruler 2. Thus, the reference head 4 is firmly installed on the main ruler 2, and after installation, both the first reference part 42 and the second reference part 43 are parallel to the main ruler 2. During measurement, both the first reference part 42 and the second reference part 43 of the reference head 4 abut against the inner side wall of the steel ring. Thus, it can be determined that the straight line where the displacement ruler is located is the diameter of the steel ring; thus, there is no need to swing the displacement ruler left and right to find the maximum diameter point of the steel ring, and it also makes the measurement of the inner diameter of the steel ring have higher accuracy.

[0032] Refer to Figure 5 and Figure 6 , when it is necessary to use this displacement ruler to measure the outer diameter of the steel ring, the reference head 4 is disassembled from the main ruler 2, and two extension claws 5 are respectively fixedly installed at the ends of the main ruler 2 and the measuring rod 3 that are far away from each other. The extension claw 5 consists of an installation block 51, a vertical rod 52 and a horizontal rod 53. One end of the vertical rod 52 and one end of the horizontal rod 53 are connected and fixed to each other, and the vertical rod 52 and the horizontal rod 53 are in an "L" shape, and the installation block 51 is fixedly arranged at the top of the vertical rod 52. When it is necessary to install the two extension claws 5 at the ends of the main ruler 2 and the measuring rod 3 that are far away from each other, one end of the two main rulers 2 and the measuring rod 3 are respectively inserted into the installation blocks 51 of the two extension claws 5, and are also screwed to the installation blocks 51 by bolts and respectively abut against and fix the main ruler 2 and the measuring rod 3.

[0033] After installation, the horizontal rods 53 on the two extension claws 5 are arranged opposite to each other, and the length dimension of the vertical rod 52 is set to "T", and 200mm < T < 300mm. The vertical rod 52 is set to an appropriate length dimension to adapt to half of the depth dimension value of the steel ring, so as to avoid being restricted by the depth of the steel ring when this displacement ruler measures the outer diameter of the steel ring. The length dimension of the horizontal rod 53 is set to "D", and 200mm < T < 300mm. When measuring the minimum outer diameter of the steel ring with this displacement ruler, the cross beam on the extension claw 5 enables it to be embedded inside the periphery of the steel ring, and the ends of the horizontal rods 53 on the two extension claws 5 respectively abut against the outer side wall of the steel ring.

[0034] Reference Figure 1 , Figure 7 and Figure 8 The specific implementation principle of this application embodiment is as follows: When it is necessary to use the displacement ruler to measure the inner diameter of the steel ring, the maximum range of the displacement ruler is adjusted by adjusting the position of the fixing bolt 32 locked on the measuring rod 3, so that the maximum range of the displacement ruler is suitable for measuring the inner diameter of the steel ring of this model. Then, one end of the main ruler 2 is inserted into the mounting hole 411 of the reference head 4, and the mounting bolt 413 is screwed into the mounting screw hole 412 of the mounting part 41, so that the end of the mounting bolt 413 abuts against the main ruler 2, thereby making the reference head 4 and the main ruler 2 not only firmly installed, but also easy to disassemble. When measuring the inner diameter, the first reference part 42 and the second reference part 43 of the reference head 4 abut against the inner wall of the steel ring, so that the straight line where the displacement ruler is located is the diameter of the steel ring. Pulling the measuring rod 3 causes the display 1 to slide along the main ruler 2, so that the end of the measuring rod 3 also abuts against the inner wall of the steel ring.

[0035] Display 1 shows the value measured by the main scale 2, from which the inner diameter of the steel ring can be determined. This inner diameter is the reading on display 1 (the value in segment "M" in the diagram) plus the range set on the measuring rod 3 (the value in segment "W" in the diagram). Measuring the inner diameter of the steel ring using this displacement gauge eliminates the need for swaying left and right to find the maximum point, making the measurement operation convenient and the results accurate. The displacement gauge, through the cooperation of the main scale 2 and the measuring rod 3, provides a larger measuring range. When not in use, sliding the main scale 2 and the measuring rod 3 closer together reduces the space occupied by the displacement gauge, making it easy to carry and store.

[0036] When the outer diameter of the steel ring needs to be measured using this displacement gauge, the reference head 4 is removed from the main scale 2. The two extension claws 5 are respectively fixed to the ends of the main scale 2 and the measuring rod 3 that are far apart from each other. The mounting blocks 51 of the two extension claws 5 are fixed to the ends of the main scale 2 and the measuring rod 3, respectively. The displacement gauge is then placed around the steel ring, and the two extension claws 5 are moved closer together, so that the ends of the crossbars 53 of the two extension claws 5 abut against the outer wall of the steel ring. The extension claws 5 solve the problem of insufficient embedding depth of the displacement gauge when measuring the outer diameter of the steel ring.

[0037] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, shall be protected by the present invention.

Claims

1. A displacement gauge for measuring the inner and outer diameters of a steel ring, characterized in that: It includes a display, a main scale, a measuring rod, a reference head and a pair of extension claws. A through hole is horizontally formed in the display. The main scale is inserted into the through hole of the display, and the display can show the reading of the main scale. The measuring rod is detachably and fixedly arranged at the bottom end of the display, and the measuring rod and the main scale are on the same straight line. The reference head includes a mounting portion, a first reference portion and a second reference portion. The reference head is fixedly mounted at one end of the main scale away from the measuring rod through its mounting portion. The first reference portion and the second reference portion are located on both sides of the mounting portion and are both parallel to the main scale. The two extension claws are respectively vertically fixed at one ends of the main scale and the measuring rod away from each other.

2. The displacement ruler for measuring the inner and outer diameters of a steel ring according to claim 1, wherein: A mounting hole is formed in the mounting portion. The through direction of the mounting hole is parallel to the first reference portion and the second reference portion. The main scale is inserted into the mounting hole. A mounting screw hole is formed on the surface of the mounting portion, and a mounting bolt that abuts against the main scale is threadedly connected in the mounting screw hole.

3. The displacement gauge for measuring the inner and outer diameters of a steel ring according to claim 1, characterized in that: A plurality of fixing holes are formed along the measuring rod. Fixing bolts are inserted into the fixing holes, and the measuring rod is locked and fixed to the display through the fixing bolts.

4. A displacement gauge for measuring the inner and outer diameters of a steel ring according to claim 3, characterized in that: The plurality of fixing holes are evenly distributed along the length direction of the measuring rod.

5. A displacement gauge for measuring the inner and outer diameters of a steel ring according to claim 1, characterized in that: The extension claw consists of a mounting block, a vertical rod and a horizontal rod. The vertical rod and the horizontal rod are in an "L" shape. The mounting block is located at the top end of the vertical rod. The mounting block is fixed to the main scale, so that the horizontal rods of the two extension claws are arranged oppositely.

6. A displacement gauge for measuring the inner and outer diameters of a steel ring according to claim 5, characterized in that: The length dimension of the vertical rod is set as "T", and 200mm < T < 300mm. The length dimension of the horizontal rod is set as "D", and 200mm < T < 300mm.

7. A displacement gauge for measuring the inner and outer diameters of a steel ring according to claim 1, characterized in that: A limiting block is formed at one end of the main scale close to the measuring rod.

8. A displacement gauge for measuring the inner and outer diameters of a steel ring according to claim 1, characterized in that: The measuring range of the main scale is equal to the maximum measuring range of the measuring rod.

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