Center distance measuring ruler

Abstract

The utility model discloses a center distance measuring ruler which comprises three board rulers, each board ruler comprises a rotating disc and a board body, the three rotating discs are distributed in a stacked mode, a groove is formed in the middle of each rotating disc, a pin shaft is arranged in each groove, a first scale mark and a second scale mark are arranged on the upper surface of each board body, and the first scale marks and the second scale marks are arranged on the lower surface of each board body. Through the above structure, the basic function of length measurement can be conveniently realized, the center distance of holes or bosses which have a common center and are uniformly or non-uniformly distributed on the circumference can be measured, and the center position can be determined. And the angle between the two board rulers can be measured, so that the board ruler can be conveniently applied to mathematics, measurement, engineering and other subjects, and has relatively high practicability.

Description

Technical Field

[0001] This utility model relates to the technical field of center distance measuring ruler, and particularly to a center distance measuring ruler. Background Technology

[0002] In daily production, we often encounter ring-shaped components with holes or bosses evenly or non-uniformly distributed around a common center. These holes or bosses may be evenly and symmetrically distributed, oddly and asymmetrically distributed, or oddly and non-uniformly distributed. Because the central part is empty, and the internal and external surfaces that can be used for measurement are not on the same plane and are far apart, using external measuring tools is inconvenient and affects measurement accuracy. Therefore, it is difficult to inspect the center distance after the parts are manufactured, especially for parts with an oddly asymmetrical and non-uniformly distributed center distance. Existing measuring tools such as vernier calipers and rulers cannot directly measure this distance. For example, a Chinese patent discloses "a measuring ruler..." The application number is "CN201820782332.3". It includes an indicator rod and a measuring rod. The measuring rod includes a measuring rod body and a base plate. The measuring rod body is cylindrical, and its circumferential side is provided with a length scale along its length direction. The end point of the length scale is located at the upper end of the measuring rod body. The base plate is fixed to the lower end of the measuring rod body, and the lower surface of the base plate is flush with the zero point of the length scale. The indicator rod is set on the measuring rod body and can move up and down along the length direction of the measuring rod body. There are two indicator rods, which are set one above the other. The indicator rod is provided with fasteners. Through the above structure, it is convenient to use, but it is not convenient to measure the center distance or the angle. Its practicality is low and its use is limited. Summary of the Invention

[0003] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a center distance measuring ruler. By setting up a ruler, a rotating disk and a plate, a pin shaft, a first scale line and a second scale line, and an annular scale line, it is easy to realize its basic function of measuring length. At the same time, it can also measure the center distance of holes or bosses with a common center that are evenly or non-evenly distributed around the circumference, and can determine the center position. It can also measure the angle between two rulers, which is convenient for application in mathematics, measurement, engineering and other disciplines, and has strong practicality.

[0004] This utility model also provides a center distance measuring ruler as described above, comprising: a ruler plate, wherein three ruler plates are provided, each ruler plate including a rotating disk and a plate body, the three rotating disks are stacked and distributed, and a groove is provided in the middle position, a pin is provided in the groove, a first scale line and a second scale line are provided on the upper surface of the plate body, and annular scale lines are provided on the rotating disks, the annular scale lines being distributed in a ring. Through the above structure, it is easy to realize its basic function of measuring length, and at the same time, it can also measure the center distance of holes or bosses with a common center that are uniformly or non-uniformly distributed around the circumference, and can determine the center position, and can measure the angle between two ruler plates, which is convenient for application in mathematics, measurement, engineering and other disciplines, and has strong practicality.

[0005] According to the center distance measuring ruler of this utility model, an upper pressure plate is provided on the upper surface of the uppermost rotating disk. The upper pressure plate is sleeved on the pin shaft. The diameter of the upper pressure plate is smaller than the diameter of the rotating disk. Through the above structure, it is convenient to limit the uppermost rotating disk and prevent it from falling off.

[0006] According to the center distance measuring ruler of this utility model, a nut is threaded onto the pin shaft, and the nut is located above the upper pressure plate. The above structure facilitates the limiting and fixing of the rotating disk.

[0007] According to the center distance measuring ruler of this utility model, a lower pressure plate is provided below the bottom rotating disk, and the lower pressure plate is sleeved on the pin shaft. Through the above structure, it is convenient to limit the bottom of the ruler.

[0008] According to the center distance measuring ruler of this utility model, a limiting block is fixedly connected to one end of the pin shaft near the lower pressure plate. The limiting block is conical. With the above structure, it can be used as a punch and can limit the lower pressure plate.

[0009] According to the center distance measuring ruler of this utility model, the starting points of the first scale line and the second scale line are not at the same end. This structure facilitates measurement work.

[0010] Beneficial effects:

[0011] Compared with existing technologies, this center distance measuring ruler, by setting up a ruler, a rotating disk and a plate, a pin shaft, a first scale line and a second scale line, and a ring scale line, can easily realize its basic function of measuring length. At the same time, it can also measure the center distance of holes or bosses with a common center that are evenly or non-uniformly distributed around the circumference, and can determine the center position. It can also measure the angle between two rulers, making it easy to apply to disciplines such as mathematics, measurement, and engineering, and has strong practicality. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0013] Figure 1 This is an overall structural diagram of a center distance measuring ruler according to the present invention;

[0014] Figure 2 This is a bottom view of the structure of a center distance measuring ruler according to the present invention;

[0015] Figure 3 This is a cross-sectional view of a center distance measuring ruler according to the present invention;

[0016] Figure 4 This is a structural diagram of a center distance measuring ruler according to the present invention.

[0017] Legend:

[0018] 1. Ruler; 2. Scale line one; 3. Scale line two; 4. Upper pressure plate; 5. Nut; 6. Lower pressure plate; 7. Limit block; 8. Pin; 9. Circular scale line; 10. Rotating disk; 11. Plate body. Detailed Implementation

[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0020] Reference Figure 1-4 This utility model provides a center distance measuring ruler, comprising: a ruler 1, of which three rulers are provided, each ruler 1 including a rotating disk 10 and a plate body 11. The three rotating disks 10 are stacked and distributed, with a groove in the middle position. A pin 8 is provided in the groove. An upper pressure plate 4 is provided on the upper surface of the uppermost rotating disk 10, and the upper pressure plate 4 is sleeved on the pin 8. The diameter of the upper pressure plate 4 is smaller than the diameter of the rotating disk 10. A lower pressure plate 6 is provided below the lower rotating disk 10, and the lower pressure plate 6 is sleeved on the pin 8. A nut 5 is threadedly connected to the pin 8, and the nut 5 is located above the upper pressure plate 4. A limit block 7 is fixedly connected to one end of the pin 8 near the lower pressure plate 6. The limit block 7 is conical. The upper surface of the plate body 11 is provided with a first scale line 2 and a second scale line 3. The starting points of the first scale line 2 and the second scale line 3 are not at the same end. The rotating disks 10 are provided with annular scale lines 9, which are distributed in a ring.

[0021] Specifically, during measurement, the three rulers 1 of the center distance measuring ruler can rotate freely around the pin 8. The rulers 1 are rotated according to the position requirements of the hole being measured, and the values ​​are read according to the measurement position to complete the measurement work. After the work is completed, the rulers 1 are rotated to the side-by-side position, and the center distance measuring ruler can be folded up. The nut 5 limits and fixes the upper pressure plate 4 to prevent it from falling off. The upper pressure plate 4 and the lower pressure plate 6 limit and fix the rulers 1 to prevent it from falling off.

[0022] Working principle: In actual use, when the center of the part being inspected is empty, a plane needs to be constructed in the middle to support the pin in the center distance measuring ruler, so that the three rulers are basically in the same plane as the plane where the hole to be inspected is located. Then, rotate the ruler to the hole to be measured. First, measure the inner dimension of the hole and adjust the position of the measuring ruler. When the values ​​of the three rulers are the same, a measurement value K is obtained. Then, the diameter D of the hole can be measured directly. The value of (2K+D) is the center distance value of the asymmetrically distributed holes in the annular structure. Alternatively, no support needs to be constructed in the middle. Two people can operate it. One person holds the middle part of the measuring ruler and adjusts the height so that the three rulers are in the same plane as the plane where the hole to be inspected is located. The other person rotates the ruler to the position of the hole to be measured and completes the measurement according to the above method. During installation, first insert the lower pressure plate into the pin, and then insert the three rulers in sequence. Note that the scale face of the ruler should be facing upwards and the three rulers should be in the same position. Then, place the upper pressure plate on top of the rulers and finally tighten the nuts. The tightening force of the nuts should be such that the three rulers can rotate. The installation is complete.

[0023] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A center distance measuring ruler, characterized in that, include: Ruler (1), three rulers (1) are provided. The ruler (1) includes a rotating disk (10) and a plate body (11). The three rotating disks (10) are stacked and distributed, and a groove is provided in the middle position. A pin (8) is provided in the groove. The upper surface of the plate body (11) is provided with scale line one (2) and scale line two (3). The rotating disk (10) is provided with annular scale lines (9). The annular scale lines (9) are distributed in annularly.

2. A center measuring scale according to claim 1, wherein The uppermost rotating disk (10) is provided with an upper pressure plate (4) on its upper surface. The upper pressure plate (4) is sleeved on the pin (8). The diameter of the upper pressure plate (4) is smaller than the diameter of the rotating disk (10).

3. A center measuring scale according to claim 1 wherein, A nut (5) is threaded onto the pin (8), and the nut (5) is located above the upper pressure plate (4).

4. A center measuring scale according to claim 1 wherein, A lower pressure plate (6) is provided below the bottom rotating disk (10), and the lower pressure plate (6) is sleeved on the pin (8).

5. A center measuring scale according to claim 1 wherein, The pin (8) is fixedly connected to a limiting block (7) near the lower pressure plate (6), and the limiting block (7) is conical.

6. A center measuring scale according to claim 1 wherein, The starting points of the first (2) and the second (3) scale lines are not at the same end.

Images