CN106595438A - Angle measuring tool - Google Patents

Abstract

The invention relates to an angle measurement tool, comprising a base for placing a conductive tube, a dial structure, a first reference structure for positioning and matching with the first straight part of the conductive tube, and a base for positioning with the conductive tube. The second straight pipe part of the positioning fits the second reference structure. The dial structure includes a dial with scales and a vernier that can swing around the central axis of the dial. The reference line of the second reference structure passes through the center of the dial. , the second reference structure can swing around the central axis of the dial and is connected synchronously with the vernier. The vernier is located at the starting point when the reference line of the second reference structure is parallel to the reference line of the first reference structure. The end point is when the reference line of is parallel to the second straight pipe section of the conductive pipe. The bending angle of the conductive pipe can be read out by using the angle measuring tool of the present invention. Compared with the light-ray scanning and other angle measuring machines in the prior art, the manufacturing cost is low and the operation is easy.

Description

An Angle Measuring Tool

technical field

The invention relates to an angle measuring tool.

Background technique

The conductive tube is a component of high-voltage electrical products. As shown in Figure 1, the middle part of the conductive tube is bent, and the entire conductive tube is divided into the first straight tube part and the second straight tube part, and the first straight tube part and the second straight tube part. The straight pipe part forms a bending angle a, and the accuracy of the bending angle a is required to meet ±10′ in the actual production process. In order to detect whether the bending angle of the conductive tube is qualified, the angle template is usually used in the prior art to compare the bending angle of the conductive tube, but this method cannot read the angle; or use an angle measuring machine to measure, although it can Accurate reading of the angle, but the cost is higher. In view of the above problems, an angle measurement tool is now provided.

Contents of the invention

The object of the present invention is to provide an angle measuring tool capable of measuring the bending angle of a conductive tube and having a low cost.

For realizing the above object, technical scheme of the present invention is:

An angle measurement tool, comprising a base for placing a conductive tube, a dial structure, a first reference structure for positioning and matching with the first straight part of the conductive tube, and a second reference structure for positioning with the conductive tube. The second datum structure for positioning and matching of the straight pipe part. The dial structure includes a dial with an angular scale and a vernier that can swing around the central axis of the dial. The datum line of the second datum structure passes through the center of the dial. The two reference structures can swing around the central axis of the dial and are synchronously connected with the vernier; the vernier is located at the starting point when the reference line of the second reference structure is parallel to the reference line of the first reference structure. The line ends when it is parallel to the second straight section of conduit.

The vernier is a vernier plate coaxially rotatable with the dial, and the vernier plate is provided with an equal angle scale line, and the vernier plate and the dial form a vernier angle scale.

The center of the dial has a circular hole for the cursor to be embedded in, and a flange is provided on the side wall of the circular hole, and a fixed disk is connected to the cursor through a detachable connection structure. A groove into which the flange enters, and the flange is located in the groove.

Balls are arranged between the fixed plate and the dial and between the vernier plate and the dial, and R dimples are arranged on the upper side of the fixed disc and the lower side of the vernier disc, and the balls are located in the R dimples.

A guide rail extending along a direction perpendicular to the reference line of the first reference structure is provided on the base, and the dial structure is movably assembled on the guide rail.

The base is provided with two parallel guide posts, which constitute the guide rail, and the underside of the dial is provided with two sets of rollers with ring grooves corresponding to the two guide posts one by one. The rollers are located on the inner side of the two guide posts and the rolling axis Parallel to the central axis of the dial, the two guide posts are respectively clamped in the ring grooves of the corresponding rollers.

The first reference structure includes two positioning pins fixed on the base at left and right intervals, and the line connecting the centers of the two positioning pins is the reference line of the first reference structure.

The second reference structure includes a swing rod and two stop pins arranged at intervals along the length direction of the swing rod. The swing rod is fixed on the upper side of the cursor, and the axis of one of the two stop pins coincides with the central axis of the cursor.

The beneficial effects of the present invention are: the angle measuring tool of the present invention is provided with a vernier that can swing around the central axis of the dial on the dial, and the scale pointed by the vernier can be read, and the second reference structure can rotate around the central axis of the dial. Swing, and synchronously connected with the vernier, the angle that the vernier swings is the angle that the second reference structure turns. During use, the first reference structure is positioned and matched with the first straight pipe part of the conductive pipe, so that the reference line of the first reference structure is parallel to the first straight pipe part, and the second reference structure is rotated to make it align with the second straight pipe of the conductive pipe. Part positioning fit, that is, the reference line of the second reference structure is parallel to the second straight pipe part. When the reference line of the second reference structure is parallel to the reference line of the first reference structure, the cursor is at the starting position; The angle from the position to the end position is the angle through which the reference line of the second reference structure is turned, that is, the bending angle of the conductive tube. The bending angle of the conductive tube can be read by using the angle measuring tool of the present invention, and compared with the light-ray scanning and other angle measuring machines in the prior art, the manufacturing cost is low and the operation is easy.

Further, the vernier of the present invention is a vernier disc with an equal angle scale, and the vernier disc and the dial form a vernier angle scale structure. When reading, read the integer part according to the angle scale on the dial, and then read the decimal part according to the equal angle scale on the vernier disc. The actual rotation angle of the vernier disc is the sum of the integer part and the decimal part, and the measurement accuracy is high.

Furthermore, the dial structure is guided and assembled on the base, and can guide and move along the direction perpendicular to the reference line of the first reference structure. By adjusting the position of the dial structure, conductive tubes with different specifications can be measured.

Description of drawings

Fig. 1 is the structural representation of conductive tube;

Fig. 2 is a schematic structural view of Embodiment 1 of the angle measuring tool of the present invention;

Fig. 3 is a top view of Fig. 2 (the vernier disc is at zero position);

Fig. 4 is a schematic structural diagram of Embodiment 1 of the angle measuring tool of the present invention (the second reference structure is positioned and coordinated with the conductive tube);

Figure 5 is an enlarged view of C in Figure 2;

Figure 6 is an enlarged view of A in Figure 3;

7 is a schematic diagram of the assembly of the roller and the dial in Embodiment 1 of the angle measuring tool of the present invention;

Fig. 8 is a schematic structural view of the base in Embodiment 1 of the angle measuring tool of the present invention;

Figure 9 is a top view of Figure 8;

10 is a schematic diagram of the dial and the vernier in Embodiment 1 of the angle measuring tool of the present invention;

Fig. 11 is a sectional view along A-A in Fig. 10;

Fig. 12 is a schematic structural diagram of the second reference structure in Embodiment 1 of the angle measuring tool of the present invention;

Figure 13 is a top view of Figure 12;

Fig. 14 is a schematic structural view of the roller component in Embodiment 1 of the angle measuring tool of the present invention;

Fig. 15 is a left side view of Fig. 14 .

detailed description

Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

A specific embodiment 1 of an angle measuring tool of the present invention, as shown in Figures 2 to 15, the angle measuring tool includes a base 1 and a dial structure 5 arranged on the base 1, and the upper surface of the base 1 constitutes a On the measurement plane where the conductive tube is placed, the base 1 has an L-shaped structure. The upper plate surface of the base 1 includes a transverse plate portion 1a extending in the left-right direction and a longitudinal plate portion 1b extending in the front-rear direction. The transverse plate portion 1a and the longitudinal The upper surface of the plate portion 1b is at the same height, and there is a groove 1c extending in the front-rear direction between the transverse plate portion and the longitudinal plate portion. Two positioning pins 2 on the left and right are fixed on the transverse plate part 1a. The two positioning pins 2 constitute the first reference structure for positioning and matching with the first straight pipe part of the conductive tube. The reference line of the first reference structure is The center line 20 of the two positioning pins 2.

The dial structure 5 comprises a dial 14 with an angular scale and a vernier that can swing around the central axis of the dial 14, the vernier is a vernier 15 coaxially arranged with the dial 14, and the angular scale on the dial 14 The lines are distributed in an arc shape, and the minimum scale is 1°; the edge of the vernier plate 15 is provided with an equal angle scale line, and the sum of the n minimum angle scale values of the vernier plate 15 is equal to the n-1 minimum angle scales on the scale plate 14 The sum of the values, the vernier disc 15 and the dial 14 form a vernier angle scale. In the present embodiment, the vernier disc 15 has a 30-degree scale, that is, 30 divisions of the vernier disc are equal to 29°. The angular scales on the dial 14 are arranged symmetrically with respect to the zero scale line, and the bisected angular scales on the vernier plate 15 are distributed symmetrically about the zero scale line, so that readings can be measured in a forward or reverse direction. Since the zero scale line on the dial 14 is perpendicular to the reference line of the first reference structure, no matter the forward measurement or the reverse measurement, the angle number read out is the angle between the first and second straight tube parts of the conductive tube , without angle conversion.

The vernier disc 15 is rotatably mounted on the dial 14, and the lower side of the vernier disc 15 is connected with a fixed disc 16 through a detachable connection structure. The center of the dial 14 has a round hole for the embedment of the vernier disc 15, and the scale on the dial 14 is distributed along the opening of the round hole; There is a boss on the lower side, and threaded holes are provided on the boss, and perforations are correspondingly provided on the fixed plate 16. When assembling, the vernier disc 15 is embedded in the round hole by the upper side of the dial 14, and the upper side of the flange is in contact with the vernier disc. The lower side of 15 stops and fits, and the fixed plate 16 is embedded in the round hole by the lower side of the dial 14, and the lower side of the flange is matched with the upper side of the fixed plate, and there is a concave hole between the fixed plate 16 and the vernier plate 15. Groove, flange is positioned at described groove, screw is installed in perforation and vernier disc 15 and fixed disc 16 are connected together, and perforation, threaded hole and screw have constituted the detachable connection structure that is used to connect fixed disc and vernier disc. After assembly, the upper side of the vernier plate 15 is flat with the upper side of the dial 14 , and the lower side of the fixed plate 16 is flat with the lower side of the dial 14 . In order to reduce the frictional resistance when the vernier disc rotates, in this embodiment, balls 21 are provided between the vernier disc and the dial, between the fixed disc and the dial, and the lower edge of the vernier disc and the upper edge of the fixed disc are both There is an R nest, and the ball is located in the R nest.

The upper side of the vernier disc 15 is connected with a fork 4, and the upper side of the vernier disc 15 is provided with two installation holes, and the center line of the two installation holes passes through the center of the vernier disc 15, and the fork bar passes through the The screw is connected with the vernier plate 15; the swing rod 4 is provided with two stop pins 3 at intervals along its axis direction, and the swing rod 4 and the two stop pins 3 constitute the first part for positioning and matching with the second straight tube part of the conductive tube. Two reference structures, the reference line of the second reference structure is the center line 30 of the two stop pins 3, one of the two stop pins 3 is located at the center of the vernier disc 15, and the center line of the two stop pins 3 30 through the center of the vernier disc. The second reference structure is synchronously connected with the vernier disc 15, and the angle through which the vernier disc 15 turns is the angle through which the swing rod swings. When the zero scale line on the vernier plate 15 points to the zero scale line on the scale plate 14, at this moment, the vernier plate 15 is in the starting position, and the line connecting the centers of the two retaining pins 3 is parallel to the line connecting the centers of the two positioning pins 2 . When the fork 4 and the vernier disc 15 rotate an angle together relative to the dial 14, there is an included angle between the center line of the two stop pins 3 and the center line of the two positioning pins 2, and the zero point of the vernier disc The scale line points to an angle scale on the dial 14, which is the integer part of the rotation angle of the vernier 15, and then reads the precise angle through the equal angle scale on the vernier 15, which is the 15 rotation angle of the vernier. The decimal part, the integer part plus the decimal part is the rotation angle of the vernier disc 15, and is also the included angle between the center line of the two stop pins 3 and the center line of the two positioning pins 2.

The dial structure 5 is guided and installed in the groove 1c of the base 1 , and the upper sides of the dial 14 and the vernier disc 15 are flush with the upper surface of the base 1 . The groove is provided with a guide rail extending along the front-to-back direction, that is, along the datum line direction perpendicular to the first reference structure. The guide rail is two guide posts 13 arranged in parallel, and the front and rear ends of the guide post 13 are provided with supporting seats. The supporting seats include The base block 7 and the pressing block 6, the base block 7 and the pressing block 6 are correspondingly provided with semicircular grooves, the pressing block 6 is fixed on the base block 7 through the fixing pin 60, and the guide post 13 is clamped between the pressing block 6 and the base block 7 in the circular groove between them. The lower side of the dial 14 is provided with two groups of rollers 8 on the left and right. The rolling axis of the rollers 8 extends along the up and down direction. The outer surface of the roller is provided with an annular groove 9, and the guide posts 13 are respectively stuck in the annular grooves of the corresponding side rollers. In this embodiment, the roller 8 is equipped with a rotating shaft 10 whose axis extends up and down. The upper part of the rotating shaft 10 has a shaft shoulder, and the top of the rotating shaft is provided with an internal thread hole. Internally threaded hole fit. The lower part of the rotating shaft is provided with an external thread, and a ball is provided between the shoulder of the rotating shaft 10 and the roller 8; an R nut 11 is connected to the rotating shaft 10 through an external thread, and a ball 21 is arranged between the R nut and the roller. Adjust the R nut to make the roller rotate It is flexible and tightened with the back cap to prevent the R nut from falling off.

When the angle measuring tool of the present invention is in use, the conductive tube 12 to be detected is placed on the base 1, and the first straight part of the conductive tube 12 is positioned and matched with the two positioning pins 2. At this time, the two positioning pins 2 The central line 20 is parallel to the axis of the first straight pipe section. Adjust the dial structure 5 back and forth, so that the second straight pipe part of the conductive tube is positioned and matched with the stop pin 3 positioned at the center of the vernier disc 15. After the position of the dial structure is determined, turn the swing lever 4 to make the position deviated from the center of the vernier disc 15. The stop pin 3 is also positioned and matched with the second straight tube part of the conductive tube. At this time, the center line 30 of the two stop pins 3 is parallel to the axis of the second straight tube part of the conductive tube, as shown in FIG. 4 . When the central connection of the two retaining pins 3 is parallel to the central connection of the two positioning pins 2, the zero scale line on the vernier plate 15 is aligned with the zero scale line on the dial 14, and both the swing rod and the vernier plate 15 are at the starting point position, the state shown in Figure 3; when the central line 30 of the two stop pins 3 was parallel to the axis of the second straight pipe part of the conductive tube, the state shown in Figure 4, the swing bar and the vernier disc 15 were all at the end Position, the vernier disc is rotated by an angle from the starting point, the angle is the angle between the two straight pipe parts of the conductive tube, read the integer part according to the scale on the dial, and then read out according to the scale on the vernier disc The decimal part, the sum of the integer part and the decimal part is the angle between the two straight pipe parts of the conductive pipe.

In other embodiments, the dial structure can be fixed on the base, and the position of the conductive pipe is adjusted along the left and right directions during measurement, so that the second straight tube part of the conductive pipe is positioned and matched with the stopper pin located at the center of the dial. In addition, the first reference structure can also be guided and installed on the base along the front-to-back direction. The first reference structure can also be in other structural forms, such as a vertical plate extending along the left and right directions, and the side of the vertical plate is positioned and matched with the first straight tube portion of the conductive tube during use. The two stop pins 3 of the second datum structure can also be directly fixed on the vernier disc, and the connecting line between the centers of the two stop pins passes through the center of the circle all the time. There is no need to set a round hole on the dial, but a column can be set in the center of the dial. The vernier plate is coaxially mounted on the column. Two benchmark structures. In other embodiments, the vernier disc can also be of a 10-degree scale, that is, 10 divisions of the vernier disc are equal to 9°. Can also not be provided with vernier disk, vernier can be pendulum needle, and pendulum needle is fixedly connected with pendulum bar, and pendulum bar and pendulum pin synchronously swing, and now can only read according to the scale on the dial plate. It is also possible to fix a column at the center of the dial, rotate the fork to be installed on the column, and set the zero scale line on the fork. At this moment, the fork constitutes a vernier.

Claims (8)

1. An angle measurement tool, characterized in that: it includes a base for placing the conductive tube, the base is provided with a dial structure, a first reference structure for positioning and matching with the first straight part of the conductive tube, and a base for A second reference structure that is positioned and matched with the second straight pipe part of the conductive tube. The dial structure includes a dial with an angle scale and a vernier that can swing around the central axis of the dial. The reference line of the second reference structure passes through In the center of the dial, the second datum structure can swing around the central axis of the dial and is connected synchronously with the vernier; the vernier is located at the starting point when the datum line of the second datum structure is parallel to the datum line of the first datum structure. The datum line of the second datum structure is at an end point when it is parallel to the second straight pipe portion of the conductive pipe. 2. The angle measuring tool according to claim 1, characterized in that: the vernier is a vernier disc coaxially rotatable with the dial, and the vernier disc is provided with a scale line of equal angles, and the vernier disc Composed of a vernier angle ruler with a dial. 3. The angle measuring tool according to claim 2, characterized in that: the center of the dial has a circular hole for the cursor to be embedded in, a flange is provided on the side wall of the circular hole, and the cursor is connected by a detachable connection structure. There is a fixed plate, and a groove for the flange to enter is arranged between the vernier plate and the fixed plate, and the flange is located in the groove. 4. The angle measuring tool according to claim 3, characterized in that: balls are arranged between the fixed disc and the dial and between the vernier disc and the dial, and the upper side of the fixed disc and the lower side of the vernier disc are all provided with balls. There is an R nest, and the ball is located in the R nest. 5. The angle measuring tool according to any one of claims 1-4, characterized in that: the base is provided with a guide rail extending along the direction perpendicular to the reference line of the first reference structure, and the guide of the dial structure is movably assembled on the rails. 6. The angle measuring tool according to claim 5, characterized in that: the base is provided with two parallel guide posts, the guide posts constitute the guide rail, and the lower side of the dial is provided with two guide posts one-to-one corresponding to the two guide posts. Roller wheels with ring grooves are assembled, the rollers are located inside the two guide posts and the rolling axis is parallel to the central axis of the dial, and the two guide posts are respectively stuck in the ring grooves of the corresponding rollers. 7. The angle measuring tool according to any one of claims 1-4, characterized in that: the first reference structure includes two positioning pins fixed on the base at left and right intervals, and the connecting line between the centers of the two positioning pins is The datum line of the first datum structure. 8. The angle measuring tool according to any one of claims 2-4, characterized in that: the second reference structure includes a swing rod and two stop pins arranged at intervals along the length direction of the swing rod, and the swing rod is fixed on the vernier disc. On the upper side, the axis of one of the two stop pins coincides with the central axis of the vernier disc.