CN202814300U - Inter-hole center distance measuring instrument - Google Patents

Abstract

The utility model discloses a measuring instrument and especially provides an inter-hole center distance measuring instrument. The utility model provides an inter-hole center distance measuring instrument capable of measuring the center distance between holes once. The measuring instrument comprises a main ruler rod and a vernier. The vernier is arranged on the main ruler rod in a sliding way. The end part of the main ruler rod is provided with a fixing card. A screwing nut is arranged on the vernier. The vernier and the fixing card are respectively provided with a measuring claw with a tapered contour. By arranging the measuring claws with tapered contours, the measuring instrument is enabled to measure the center distance between two holes by directly making the measuring claws placed inside the two holes to be measured and then displaying the readings of the vernier on the main ruler rod. In this way, multiple measuring operations are no longer necessary. Meanwhile, the measuring instrument reduces the measuring errors and further increases the efficiency.

Description

Hole Center Distance Measuring Instrument

technical field

The utility model relates to a measuring tool, in particular to a measuring instrument for the center distance between holes.

Background technique

In mechanical production and processing, sometimes it is necessary to accurately obtain the center distance of different apertures, but vernier calipers are often easier for linear dimensions, but for positions that cannot be measured, multiple conversions are required to obtain the final size, which is prone to errors. . When measuring the hole spacing, it is necessary to use a vernier caliper to measure the distance between the two holes, and then measure the diameter of the two holes, and then calculate the center distance between the two holes. Such multiple measurements will inevitably lead to an increase in error.

Utility model content

The technical problem to be solved by the utility model is to provide a measuring instrument for measuring the center distance between holes at one time.

The utility model solves its technical problem and adopts the measuring instrument for the center distance between holes, which includes a main ruler rod and a vernier, and the vernier is slidably arranged on the main ruler rod, and the end of the main ruler rod is provided with a fixing card. The vernier is provided with a tightening nut, and both the vernier and the fixed card are provided with measuring claws with a tapered outline.

Further, the measuring claw includes at least two claws and a spring, and installation grooves are provided on the vernier and the fixed card, and the measuring claw is installed on the installation groove, and the claw is slidably matched with the installation groove, so that The spring is installed between the jaws of the measuring jaws.

Further, the measuring jaw includes two claws.

The beneficial effects of the utility model are: since the measuring jaws with tapered contours are provided, the measuring jaws are directly inserted into the two holes to be measured when measuring the center distance of the two holes, and then the position of the cursor on the main scale is read out. The reading of the rod is enough, so that it is not necessary to take multiple measurements, which reduces the measurement error and improves the efficiency at the same time. The measuring claw includes at least two claws and a spring. At this time, when the measuring jaw is placed into the hole to be measured, the jaw will move adaptively, so that the overall diameter of the measuring jaw matches the diameter of the hole to be measured. Even if the diameters of the two holes to be measured are inconsistent, the measuring jaw will not The diameters of the respective holes to be measured can be matched by the self-adaptive movement of the jaws.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is the front view of the utility model;

Parts, parts and numbers in the figure: main ruler rod 1, vernier 2, measuring claw 3, mounting groove 4, fixed card 11, tightening nut 21, claw 31, spring 32.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figures 1 and 2, the utility model includes a main ruler 1 and a vernier 2, the vernier 2 is slidably arranged on the main ruler 1, and the end of the main ruler 1 is provided with a fixed card 11, so The vernier 2 is provided with a tightening nut 21, and the vernier 2 and the fixed card 11 are provided with a measuring jaw 3 with a tapered outline. The measuring jaw 3 with a tapered outline is mainly to ensure that the measuring jaw 3 can coincide with the center line of the hole to be measured after being placed in the hole to be measured, so that the measuring jaw 3 on the fixed card 11 and the measuring jaw 3 on the vernier 2 The center-to-center distance is the center-to-center distance of the two holes to be measured. In use, select two holes that need to measure the center distance, place the measuring claw 3 on the fixed card 11 in one of the holes, then place the measuring claw 3 on the vernier 2 in the other hole, and press down to fix it The card 11 and the vernier 2 make the respective measuring claws 3 coincide with the centerlines of the respective corresponding holes, that is, the measuring claws 3 only need to be attached to the inner wall of the hole. Since the distance reading between the measuring claw 3 on the fixed card 11 and the measuring claw 3 on the vernier 2 is preset on the main scale rod 1, the measuring claw 3 on the fixed card 11 and the measuring claw 3 on the vernier 2 can be read out at this time. The center-to-center distance between the measuring jaws 3, that is, the center-to-center distance between the two holes. The above method does not need to perform multiple measurements, avoids errors caused by multiple measurements, and does not need to perform calculations, which facilitates the operation.

In order to adapt to holes of various sizes, as shown in Figure 2, the measuring jaw 3 includes at least two claws 31 and a spring 32, the vernier 2 and the fixed card 11 are provided with installation grooves 4, the measuring jaw 3 is installed on the mounting groove 4, the claw 31 is slidingly fitted with the mounting groove 4, and the spring 32 is mounted between the claws 31 of the measuring claw 3. The jaws 31 can be combined to form a conical measuring jaw 3. When not in use, the jaws 31 are separated under the action of the spring 32. The jaws 31 themselves have a slope. When it is in the hole, the claws 31 are displaced from the center of the vector claw 3 until each claw 31 is attached to each other. Generally, two claws 31 can be provided. After adopting the self-adaptive measuring jaw 3, the measuring jaw 3 can automatically adjust the size according to the size of the hole, and even two holes with different sizes can measure the center distance at one time.

Claims (3)

1. Measuring instrument for the center distance between holes, including the main ruler (1) and the vernier (2), the vernier (2) is slidably set on the main ruler (1), and the end of the main ruler (1) A fixed card (11) is provided, and a tightening nut (21) is provided on the vernier (2). Claws (3). 2. The measuring instrument for center distance between holes according to claim 1, characterized in that: the measuring claw (3) includes at least two claws (31) and a spring (32), and the vernier (2) and the fixed Mounting grooves (4) are provided on the cards (11), the measuring jaws (3) are installed on the mounting grooves (4), the claws (31) slide and fit with the mounting grooves (4), and the springs (32 ) between the jaws (31) of the measuring jaw (3). 3. The measuring instrument for center distance between holes according to claim 2, characterized in that: the measuring jaw (3) comprises two claws (31).

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