CN222617805U - Simple circular arc radius measuring instrument - Google Patents

Abstract

The utility model relates to the technical field of measuring instruments, and discloses a simple arc radius measuring instrument, including a main ruler, one end of the main ruler is connected to a circle center axis, and positioning rulers are distributed on both sides of the circle center axis, the positioning ruler includes a positioning rod, and an axis groove is opened inside the positioning rod, one end of the positioning rod is connected to a connecting rod, and both ends of the connecting rod are distributed with a screw buckle, and the bottom end of the screw buckle is connected to a positioning plate. During measurement, the utility model obtains the center position of the arc workpiece through the intersection of two groups of positioning rods 301, and obtains the measured diameter data. The overall structure is simple and light, and the intersection of the workpiece is quickly found through two groups of symmetrical positioning structures. Not only is the operation of the diameter data measurement process of the workpiece convenient, but the overall volume structure is small, and the two groups of positioning rods 301 can be arbitrarily slid and folded in conjunction with the axis groove 302 and the knob 201, which is convenient for carrying and use after storage. It can be used in the measurement of arc workpieces in various occasions, and the measurement data is accurate.

Description

Simple circular arc radius measuring instrument

Technical Field

The utility model relates to the technical field of measuring instruments, in particular to a simple circular arc radius measuring instrument.

Background

In the actual production of some round parts or round parts, the condition that the radius of the circular arc with the central angle smaller than 180 degrees needs to be measured is frequently encountered, and for the measurement of the diameter of the circular arc of the part, the existing measurement method mainly comprises an arc template measurement method, a calliper method, a bowstring method and the like, wherein the arc template measurement method mainly adopts a radius gauge to manually measure a workpiece so as to ensure that the produced workpiece meets the standard, thereby ensuring the production and the inspection quality.

In the prior art, the radius gauge is a tool for measuring the radius of an arc by using a light gap method, the measuring surface is required to be in complete and tight contact with the arc of the workpiece during measurement, and when no gap exists between the measuring surface and the arc of the workpiece, the radius of the arc of the workpiece is a number represented on the corresponding radius.

The prior art has obvious beneficial effects, but has the following defects:

in the prior art, as the radius gauge is visually detected in the measuring process, the measuring accuracy is not very high, only qualitative measurement can be performed, five measuring points are arranged on each gauge, so that the measuring limitation on the arc workpiece is large, and some measuring instruments are complex and cannot directly measure the numerical value, so that the simple arc radius measuring instrument is complex in operation and inconvenient to carry and use.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model provides a simple arc radius measuring instrument, which is suitable for measuring a plurality of groups of arc parts by combining two groups of adjustable positioning rules and ruler rods, and is characterized in that the positioning plates at two sides are attached to the edge ends of arc workpieces and are matched with the vertical relation between the positioning rods and the connecting rods, so that arc round points of the measured workpieces are rapidly judged by crossing the positioning rods, and the whole measuring mode is accurate and the operation process is convenient.

In order to achieve the purpose, the simple arc radius measuring instrument comprises a main ruler, wherein one end of the main ruler is connected with a circle center shaft, positioning rules are distributed on two sides of the circle center shaft, each positioning rule comprises a positioning rod, an axial groove is formed in each positioning rod, one end of each positioning rod is connected with a connecting rod, turnbuckles are distributed on two ends of each connecting rod, and a positioning disc is connected to the bottom end of each turnbuckle.

Preferably, the locating disc and two ends of the connecting rod form a rotary structure through a turnbuckle, and the locating disc is distributed along the centers of the two ends of the connecting rod symmetrically.

Preferably, the center of the connecting rod is connected with one end of the positioning rod in a vertical shape, and the positioning rod and the center shaft form a sliding structure through the shaft groove.

Preferably, the main ruler comprises a ruler rod, the bottom surface of the ruler rod is attached with a glue layer, the top surface of the ruler rod is provided with a scale layer, and positioning rules are distributed on two sides of the ruler rod.

Preferably, the bottom surface of the ruler rod is tightly attached to the adhesive layer, and the scale layer is fixedly connected with the surface of the ruler rod.

Preferably, the center shaft comprises a knob, a bolt is arranged at the bottom end of the knob, a shaft bracket is attached to the bottom surface of the knob, a main scale and a positioning rod are connected to the outer wall of the periphery of the shaft bracket, and a shaft seat is fixedly connected to the bottom end of the shaft bracket.

Preferably, the knob and the shaft seat form a threaded structure through bolts, and the shaft bracket is connected with two groups of positioning rods.

Compared with the prior art, the utility model has the following beneficial effects:

1. In the measurement, the intersection point can be positioned by the intersection position of the two groups of positioning rods, so that the intersection point is the arc center position of the workpiece, and then the measured diameter data is obtained by reading the scale layer.

2. According to the utility model, the ruler rod and the shaft bracket are both in the prior art, when the ruler rod is used, a user can firstly put the ruler rod on the surface of an arc-shaped workpiece, and coordinate with the adjustment of the positioning rules and the knob at two sides to enable the circle center shaft of the positioning rules and the knob to be positioned at the circle center position of the arc-shaped workpiece, so that the diameter data from the circle center shaft to the edge end of the arc-shaped workpiece, which is jointed with the ruler rod, can be obtained by observing the scale layer on the surface of the ruler rod, and the stable arrangement of the measuring process is kept by matching with the adhesive layer on the bottom surface of the ruler rod, so that the displacement is reduced.

3. During measurement, a user can rotate the knob to screw the bolt at the bottom end of the knob and the shaft seat, so that the bottom surface of the knob compresses the shaft bracket, the shaft bracket keeps a compressed state for the two groups of positioning rods and the ruler rod, and the lifting is stable, so that the measurement and observation are convenient.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

FIG. 1 is a schematic perspective view of a main body of the present utility model;

FIG. 2 is a schematic diagram of a perspective structure of a circle center axis of the present utility model;

FIG. 3 is a schematic view of a unfolded perspective structure of a circle center shaft according to the present utility model;

FIG. 4 is a schematic perspective view of the positioning rule of the present utility model;

Fig. 5 is a schematic plan view of the measurement mode of the present utility model.

The drawing shows 1, a main scale, 101, a ruler rod, 102, a glue layer, 103, a scale layer, 2, a center shaft, 201, a knob, 202, a bolt, 203, a shaft bracket, 204, a shaft seat, 3, a positioning ruler, 301, a positioning rod, 302, a shaft groove, 303, a connecting rod, 304, a turnbuckle and 305, and a positioning disc.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art without the inventive effort, are intended to be within the scope of the present utility model, based on the embodiments herein.

Referring to fig. 1-4, a simple circular arc radius measuring instrument of the present embodiment includes a main scale 1, one end of the main scale 1 is connected with a circular mandrel 2, positioning scales 3 are distributed on two sides of the circular mandrel 2, the main scale 1 includes a ruler 101, a glue layer 102 is attached to the bottom surface of the ruler 101, a scale layer 103 is disposed on the top surface of the ruler 101, and positioning scales 3 are distributed on two sides of the ruler 101.

As shown in figures 1-5, the measuring instrument is similar to the existing measuring ruler in structure, the main improvement point of the measuring instrument is that two groups of adjustable positioning rules 3 are combined with a ruler rod 101, measurement of multiple groups of arc-shaped parts can be adapted, the two sides of a positioning disc 305 are attached to the edge end of an arc-shaped workpiece, the vertical relation between the positioning rod 301 and a connecting rod 303 is matched, accordingly, the arc-shaped circular point of the measured workpiece is quickly determined through the intersection of the positioning rod 301, the whole measuring mode is accurate, the operation process is convenient, the ruler rod 101 and a shaft bracket 203 are both in the prior art, when the measuring instrument is used, a user can firstly place the ruler rod 101 on the surface of the arc-shaped workpiece, and coordinate with adjustment of the positioning rules 3 and a knob 201 on two sides, so that a circle center shaft 2 is positioned at the circle center position of the arc-shaped workpiece, namely, diameter data from the circle center shaft 2 to the edge end of the arc-shaped workpiece attached to the ruler rod 101 can be obtained by observing a scale layer 103 on the surface of the ruler rod 101, and a glue layer 102 on the bottom surface of the rod 101 keeps stable placement of the measuring process, and displacement is reduced.

As shown in fig. 2-3, the round mandrel 2 comprises a knob 201, a bolt 202 is arranged at the bottom end of the knob 201, a shaft bracket 203 is attached to the bottom surface of the knob 201, a main scale 1 and a positioning rod 301 are connected to the peripheral outer wall of the shaft bracket 203, a shaft seat 204 is fixedly connected to the bottom end of the shaft bracket 203, the knob 201 of the instrument is positioned at the zero scale position of the scale layer 103 on the surface of the ruler 101, when the adjustment of the ruler 101 and the positioning rods 3 on two sides after adapting to a workpiece is completed, a user can screw the bolt 202 at the bottom end of the knob 201 and the shaft seat 204 by rotating the knob 201, so that the shaft bracket 203 is tightly pressed by the bottom surface of the knob 201, and the shaft bracket 203 is kept in a pressed state for the two groups of positioning rods 301 and the ruler 101, so that the instrument is stable in lifting and convenient for measurement and observation.

As shown in fig. 4-5, the positioning ruler 3 comprises a positioning rod 301, a shaft groove 302 is formed in the positioning rod 301, one end of the positioning rod 301 is connected with a connecting rod 303, two ends of the connecting rod 303 are distributed with a turnbuckle 304, the bottom end of the turnbuckle 304 is connected with a positioning disc 305, when the arc radius of an arc workpiece is measured, a user attaches the symmetrical positioning discs 305 connected with the ends of two groups of connecting rods 303 of the instrument to the arc side ends of the workpiece, then the positioning rod 301 vertically connected with the middle end of the connecting rod 303 is kept fixed, the positions of a knob 201 and one end of the ruler rod 101 in the shaft groove 302 are matched with the shaft groove 302 to carry out adaptive sliding adjustment, and along with the position of the intersection of the two groups of positioning rods 301, the knob 201 is positioned at the center of the intersection, so that the intersection is the arc center position of the workpiece, after the ruler rod 101 is stably attached to the arc edge of the workpiece, the circle center point of the workpiece is obtained, and then the circle center point of the knob 201 reaches the arc side end of the workpiece through reading the scale layer 103, so that measured diameter data is obtained.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (7)

1. The utility model provides a simple and easy circular arc radius measuring apparatu, includes main scale (1), its characterized in that, the one end of main scale (1) is connected with centre of a circle axle (2), and the both sides of centre of a circle axle (2) distribute and have location chi (3), location chi (3) are including locating lever (301), and axle groove (302) have been seted up to the inside of locating lever (301), the one end of locating lever (301) is connected with linking pole (303), and the both ends of linking pole (303) are distributed there is turnbuckle (304), the bottom of turnbuckle (304) is connected with positioning disk (305).

2. The simple arc radius measuring instrument according to claim 1, wherein the positioning disc (305) and two ends of the connecting rod (303) form a rotating structure through a turnbuckle (304), and the positioning disc (305) is distributed along the centers of the two ends of the connecting rod (303) symmetrically.

3. The simple arc radius measuring instrument according to claim 1, wherein the center of the connecting rod (303) is connected with one end of the positioning rod (301) in a vertical shape, and the positioning rod (301) and the center shaft (2) form a sliding structure through the shaft groove (302).

4. The simple circular arc radius measuring instrument according to claim 1, wherein the main ruler (1) comprises a ruler rod (101), a glue layer (102) is attached to the bottom surface of the ruler rod (101), a scale layer (103) is arranged on the top surface of the ruler rod (101), and positioning rules (3) are distributed on two sides of the ruler rod (101).

5. The simple arc radius measuring instrument according to claim 4, wherein the bottom surface of the ruler rod (101) is tightly attached to the adhesive layer (102), and the scale layer (103) is fixedly connected with the surface of the ruler rod (101).

6. The simple circular arc radius measuring instrument according to claim 1, wherein the circle center shaft (2) comprises a knob (201), a bolt (202) is arranged at the bottom end of the knob (201), a shaft bracket (203) is attached to the bottom surface of the knob (201), a main scale (1) and a positioning rod (301) are connected to the peripheral outer wall of the shaft bracket (203), and a shaft seat (204) is fixedly connected to the bottom end of the shaft bracket (203).

7. The simple arc radius measuring instrument according to claim 6, wherein the knob (201) and the shaft seat (204) form a threaded structure through a bolt (202), and the shaft bracket (203) is connected with two sets of positioning rods (301).