CN101210793A - A multifunctional caliper - Google Patents

Abstract

The invention relates to a multifunctional caliper, which includes a main scale with fixed measuring claws and sliding measuring claws, and an auxiliary scale vertically installed on the main scale and capable of sliding along its axial direction. The secondary vernier of the ruler is provided with a secondary sliding measuring claw corresponding to a fixed measuring claw on the main scale, and a chord height measuring claw is installed in the axial direction of the secondary scale. The caliper can be used to measure the chord height of the inferior arc, and can also measure the depth of the workpiece. Therefore, the caliper has multiple measurement functions and does not increase much production cost.

Description

A multifunctional caliper

Field:

The invention relates to a multifunctional caliper used for measuring the inner diameter or outer diameter and chord height of objects such as cylinders and/or round pipes.

Background technique:

A vernier caliper is a measuring tool used to measure the inner and outer diameters or thickness of machine parts or workpieces. It consists of a long ruler with a scale, a fixed measuring claw installed at one end of the long ruler, and a sliding measuring claw set on the vernier. When using this kind of measuring tool to measure machine parts or workpieces, its maximum range depends on the length of the caliper, and it is limited to measuring the inner and outer diameters or thickness of machine parts or workpieces, but cannot measure the diameter of the object corresponding to the inferior arc.

Aiming at the problems referred to above, Chinese Patent No. 155478 discloses a technology called "caliper". The caliper includes a fixed scale or scale and sliders, and electronic components. The scale includes an internal cavity extending longitudinally; the measuring element includes a wire extending in the cavity and fixed at both ends on the scale; The part of the block located on the scale includes a permanent magnet; the wire interacts with the piezoelectric crystal. Each end of the wire is electrically connected to the pulse generator to generate a short electrical pulse of a predetermined period. The detection device in the caliper cooperates with the piezoelectric crystal. , so as to measure the diameter of the tree sandwiched between the scale pillar and the slider pillar. Although the caliper can measure the outer diameter of trees with a larger diameter, the caliper has many parts, the measurement process is cumbersome, and it cannot measure The inner diameter of the larger object.

In addition, the Chinese Patent No. 2509555 Announcement titled "Caliper for Radius Measurement" is also a solution for the measurement range. The caliper is equipped with three measuring rods on an ordinary caliper with a main ruler and an auxiliary ruler. Two of the fixed rods are installed on the main ruler, and the other moving rod is installed on the auxiliary ruler and moves relative to the fixed rod with the auxiliary ruler. When two fixed rods and one moving rod are in contact with the measured arc at the same time, the coordinates of the three contact points are used together with the same electronic circuit and capacitive sensor as the electronic quantity caliper to calculate the radius corresponding to the arc, and the caliper finally The radius corresponding to the measured object can be measured through the inferior arc, but the caliper must be combined with its corresponding electronic device, the measurement procedure is cumbersome, and the production cost is high.

Invention content:

The object of the present invention is to provide a multifunctional caliper for measuring the inner and outer diameters or thicknesses of parts or workpieces, as well as chord length and depth.

The multifunctional caliper proposed by the present invention includes a main scale, one end of which is provided with two fixed measuring jaws in opposite directions and a sliding measuring jaw defined by the main vernier; and vertically installed on the main scale and The auxiliary scale that can slide along its axial direction is provided with an auxiliary sliding measuring claw corresponding to a fixed measuring claw on the main scale on the auxiliary vernier of the auxiliary scale, and a String height measuring claws.

One end of the main scale is provided with a depth measuring claw which can move along its axial direction.

The auxiliary vernier includes a sliding sleeve movable along the axial direction of the main scale, a vertical guide groove installed on the sliding sleeve, and a fastening bolt for fixing the sliding sleeve on the auxiliary scale.

The multifunctional caliper proposed by the present invention adopts a secondary scale installed on the main scale, and the chord height measuring claw is installed on the secondary scale, which can be used to measure the chord height of the inferior arc, and can be calculated by the chord height value The radius or diameter of the object to be measured is measured. At the same time, a depth measuring claw is also provided in the main scale to measure the depth of the workpiece. Therefore, this kind of caliper has multiple measurement functions and does not increase much production cost.

Description of drawings:

Accompanying drawing 1 is the appearance structure diagram of an embodiment of the multifunctional caliper proposed by the present invention.

Detailed ways:

Referring to Fig. 1, this figure provides the appearance overall structure of an embodiment of the multifunctional caliper proposed by the present invention. This kind of caliper includes a main scale 1, an auxiliary scale 2, and a depth measuring claw 3.

One end of the main scale 1 is provided with two fixed measuring claws 11 and 12 in opposite directions and in the same plane, and a main vernier 13 movable along its axial direction is installed on the main scale 1, and on the main scale 1 A sliding measuring claw 14 corresponding to the fixed measuring claw 11 is installed on the vernier 13, and the fixed measuring claw 11 and the sliding measuring claw 14 are used for measuring the diameter of a part or a workpiece. The side of the main scale 1 away from the fixed measuring claw 11 is hollow, and the depth measuring claw 3 can extend into the hollow part of the main scale 1 and move along its axial direction to measure the depth of the workpiece.

The auxiliary scale 2 includes an auxiliary vernier 21 and a chord height measuring claw 22 . The auxiliary vernier 21 has a sliding sleeve 23 movable along the axial direction of the main scale 1, a vertical guide groove 24 installed on the sliding sleeve 23, and a fastening bolt for fixing the sliding sleeve 23 on the auxiliary scale 2 25. The auxiliary scale 2 is installed vertically on the main scale 1 and can slide along its axial direction through the auxiliary vernier 21. The auxiliary scale 21 is provided with a corresponding fixed measuring claw 12 on the main scale 1. The auxiliary sliding measuring jaw 26, the fixed measuring jaw 12 and the sliding measuring jaw 26 are used to measure the inner diameter of a part or workpiece. When measuring a particularly inferior arc of a circular arc, at first use the fixed measuring claw 12 and the sliding measuring claw 26 or measure the chord length of the inferior arc with the fixed measuring claw 11 and the sliding measuring claw 14, and then measure it with the chord height measuring claw 22 The chord height of the inferior arc, according to the theorem of "three non-collinear points in the plane can determine a circle", can easily calculate the diameter of the circle where the inferior arc is located.

Claims (3)

1. A multifunctional caliper, characterized in that it comprises: a main scale provided at one end with two opposite fixed jaws and a sliding jaw defined by a main vernier; and The auxiliary scale is vertically installed on the main scale and can slide along its axial direction, and the auxiliary sliding measuring claw corresponding to a fixed measuring claw on the main scale is arranged on the auxiliary vernier of the auxiliary scale, while A chord height measuring claw is installed in the axial direction of the auxiliary scale. 2. The multi-functional caliper according to claim 1, characterized in that: a depth measuring claw that can move along its axial direction is arranged in one end of the main scale. 3. The multifunctional caliper according to claim 1, characterized in that: the auxiliary vernier includes a sliding sleeve that can move along the axial direction of the main scale and a vertical guide groove installed on the sliding sleeve, and is used to The sliding sleeve is fixed to the fastening bolt on the secondary scale.

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