Three-point type inner caliper gauge

Abstract

The utility model discloses a three-point type internal caliper gauge, which comprises a first support leg, a second support leg and a measuring assembly, the measuring assembly comprises contact pins, a pin shaft, a dial indicator and a screw rod, the side wall of the first support leg is fixedly connected with the contact pins, the side wall of the second support leg is symmetrically and fixedly connected with two contact pins, and the pin shaft is fixedly connected with the dial indicator. The first supporting leg and the second supporting leg are rotationally connected through a pin shaft, a dial indicator is embedded in the side wall of the second supporting leg, a screw is in threaded connection with the side wall of the second supporting leg, the side wall of the screw is sleeved with a spring, one end of the spring is fixedly connected with the side wall of the second supporting leg, and the other end of the spring is fixedly connected with the side wall of the second supporting leg. And the other end of the spring is fixedly connected with the side wall of the screw rod. The three contact pins abut against a workpiece, fixation is more stable, sliding is not prone to occurring, measured data are more stable, the first supporting foot is pushed to rotate around the pin shaft by rotating the threaded rod and cooperating with the spring, then measurement is carried out, and measurement errors caused by operation of different measurement personnel are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of caliper gauges, in particular to a three-point internal caliper gauge. Background Art

[0002] A caliper gauge is a measuring tool that can be adjusted to measure thickness, diameter, caliber and distance between surfaces. It is used to check the smoothness limit gauge of the shaft. It is usually divided into two types: inside diameter caliper gauge and outside diameter caliper gauge.

[0003] The existing conventional caliper gauge is usually only provided with two contact points, which may slip when the workpiece is clamped, resulting in unstable fixation and large measurement errors. In addition, the existing caliper gauge provides measuring force by manually bending the support feet, which may result in different errors due to different measurement personnel. Based on this, we propose a three-point internal caliper gauge. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a three-point internal caliper gauge.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] Three-point internal caliper gauge, including a first leg and a second leg;

[0007] A measuring component, the measuring component includes a contact pin, a pin shaft, a dial indicator and a screw, the side wall of the first support leg is fixedly connected to the contact pin, the side wall of the second support leg is symmetrically fixedly connected to two contact pins, the first support leg and the second support leg are rotationally connected via a pin shaft, the side wall of the second support leg is embedded with a dial indicator, and the side wall of the second support leg is threadedly connected to the screw.

[0008] Preferably, the measuring assembly further comprises a spring, the side wall of the screw rod is sleeved with the spring, one end of the spring is fixedly connected to the side wall of the second support leg, and the other end of the spring is fixedly connected to the side wall of the screw rod.

[0009] Preferably, a bushing is fixedly connected to the side wall of the dial indicator, and a first screw is threadedly connected to the side wall of the bushing.

[0010] Preferably, the side wall of the second supporting leg is threadedly connected with a second screw.

[0011] Preferably, a handle is fixedly connected to the upper end of the second leg, and the side wall of the handle is engraved with anti-slip patterns.

[0012] Preferably, the three contact pins are arranged at the same height.

[0013] The utility model has the following beneficial effects:

[0014] 1. By setting up the measuring mechanism, three contact pins are used to counteract the workpiece, which makes it more stable and less likely to slide. The measurement data is more stable. By rotating the screw and cooperating with the spring, the first leg is pushed to rotate around the pin shaft to perform measurement. There will be no measurement errors caused by different measurement personnel.

[0015] 2. By setting the bushing and the first screw and rotating the first screw, the dial indicator head is clamped and fixed to avoid measurement errors caused by unstable head.

[0016] 3. By setting the second screw, the second screw abuts against the side wall of the first support leg, so as to limit the position of the first support leg and play a stabilizing role. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the three-point internal caliper gauge proposed by the utility model;

[0018] Figure 2 for Figure 1 A magnified schematic diagram of the structure at center A;

[0019] Figure 3 for Figure 1 A magnified schematic diagram of the structure at B in the figure.

[0020] In the figure: 1 first support leg, 2 second support leg, 3 contact pin, 4 pin shaft, 5 dial indicator, 6 screw rod, 7 spring, 8 bushing, 9 first screw, 10 second screw, 11 handle. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-Figure 3 , a three-point internal caliper gauge, comprising a first leg 1 and a second leg 2;

[0023] The measuring component includes a contact pin 3, a pin shaft 4, a dial indicator 5 and a screw 6. The side wall of the first leg 1 is fixedly connected with the contact pin 3, and the side wall of the second leg 2 is symmetrically fixedly connected with two contact pins 3. The three contact pins 3 are arranged at the same height. The first leg 1 and the second leg 2 are rotatably connected through the pin shaft 4. The side wall of the second leg 2 is embedded with a dial indicator 5, and the side wall of the second leg 2 is threadedly connected with a screw 6.

[0024] Furthermore, by means of three contact pins 3 abutting against the workpiece, the fixation is more stable and less likely to slip, and the measurement data is more stable. By rotating the screw rod 6 and cooperating with the spring 7, the first support leg 1 is pushed to rotate around the pin shaft 4, and measurement is then performed, and measurement errors will not be caused by operations performed by different measurement personnel.

[0025] The measuring assembly also includes a spring 7 . The side wall of the screw rod 6 is sleeved with the spring 7 . One end of the spring 7 is fixedly connected to the side wall of the second support leg 2 , and the other end of the spring 7 is fixedly connected to the side wall of the screw rod 6 .

[0026] A bushing 8 is fixedly connected to the side wall of the dial gauge 5, and a first screw 9 is threadedly connected to the side wall of the bushing 8. By rotating the first screw 9, the head of the dial gauge 5 is clamped and fixed to avoid measurement errors caused by unstable head.

[0027] The side wall of the second supporting leg 2 is threadedly connected with a second screw 10 , and the second screw 10 abuts against the side wall of the first supporting leg 1 , so as to limit the position of the first supporting leg 1 and play a stabilizing role.

[0028] A handle 11 is fixedly connected to the upper end of the second leg 2, and the side wall of the handle 11 is engraved with anti-slip patterns.

[0029] In the utility model, the first leg 1 and the second leg 2 are inserted into the workpiece, and then the screw 6 is rotated, the screw 6 will push the first leg 1 to rotate around the pin 4, and then the first leg 1 and the second leg 2 will slowly open, so that the contact pin 3 on the first leg 1 and the two contact pins 3 on the second leg 2 are respectively against the inner wall of the workpiece, at this time, the second screw 10 can be rotated, so that the second screw 10 is against the side wall of the first leg 1, and it is limited, and then the reading can be taken to measure the value of the workpiece.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Three-point internal caliper gauge, characterized in that: include: A first leg (1) and a second leg (2); A measuring assembly, the measuring assembly comprising a contact pin (3), a pin shaft (4), a dial indicator (5) and a screw (6); the contact pin (3) is fixedly connected to the side wall of the first support leg (1); two contact pins (3) are symmetrically fixedly connected to the side wall of the second support leg (2); the first support leg (1) and the second support leg (2) are rotatably connected via the pin shaft (4); a dial indicator (5) is embedded in the side wall of the second support leg (2); and the screw (6) is threadedly connected to the side wall of the second support leg (2).

2. The three-point internal caliper gauge according to claim 1, characterized in that: in: The measuring assembly also includes a spring (7), the side wall of the screw rod (6) is sleeved with the spring (7), one end of the spring (7) is fixedly connected to the side wall of the second support leg (2), and the other end of the spring (7) is fixedly connected to the side wall of the screw rod (6).

3. The three-point internal caliper gauge according to claim 2, characterized in that: in: The side wall of the dial indicator (5) is fixedly connected with a bushing (8), and the side wall of the bushing (8) is threadedly connected with a first screw (9).

4. The three-point internal caliper gauge according to claim 3, characterized in that: in: The side wall of the second supporting leg (2) is threadedly connected with a second screw (10).

5. The three-point internal caliper gauge according to claim 4, characterized in that: in: The upper end of the second support leg (2) is fixedly connected to a handle (11), and the side wall of the handle (11) is engraved with anti-slip patterns.

6. The three-point internal caliper gauge according to claim 5, characterized in that: in: The three contact pins (3) are arranged at the same height.

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