CN216977679U

CN216977679U - Common normal line limit gauge

Info

Publication number: CN216977679U
Application number: CN202220471872.6U
Authority: CN
Inventors: 李宝森; 贺少文; 杨帆
Original assignee: Baoji Sijia Machine Tool Parts Co ltd
Current assignee: Baoji Sijia Machine Tool Parts Co ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-07-15
Anticipated expiration: 2032-03-04

Abstract

The common normal line limit gauge is provided with an upper main plate and a lower bottom plate, wherein a supporting block is arranged between two ends of the upper main plate and the lower bottom plate; the right side surface of the leftmost supporting block body is vertically arranged; a plurality of mounting holes are formed in the length direction of the upper main board body; different mounting holes are provided with fixed measuring arms, block gauges, through-stop measuring arms and adjusting blocks; a horizontal jackscrew is arranged on the adjusting block body, and a penetrating end on the left side of the jackscrew tightly pushes and fixes the measuring arm, the block gauge and the through-stop measuring arm; replacing block gauges with different sizes for adjusting and fixing the distance between the measuring arm and the on-off measuring arm; the fixed measuring arm and the open-close measuring arm are used for detecting the size of the workpiece. The utility model can quickly adjust the gauge to measure the size, is convenient and quick to adjust, and can efficiently measure whether the common normal length and the tolerance of the gear are qualified or not; the method is also suitable for detecting the outer and inner rabbets of the workpiece, the span rod distance of the straight-tooth and helical-tooth inner gears, the detection precision meets the requirement of GB/T1957, the detection efficiency can be greatly improved, the product completion progress is accelerated, and the method has a good effect.

Description

Common normal line limit gauge

Technical Field

The utility model belongs to the technical field of physical measurement and test limit gauges, and particularly relates to a common normal limit gauge.

Background

The common normal length and tolerance measurement of the external gear of the mechanical precision part is equivalent to the dimensional accuracy IT7-IT 9. When mass production is carried out, the method is particularly suitable for detecting a limit gauge, and particularly in the inspection stage, the error between the measurement precision and the target value is +/-0.003 mm. Taking the external gear common normal line length of mass production of our company as an example of ≦ 125, a common measuring tool common normal micrometer is currently used for detection. During final inspection, each gear needs to be detected by a common normal micrometer, 2000 workpieces need to be detected every day, and the problems of large measurement workload and low detection efficiency exist. The problems also exist in batch inspection of cross-rod distances of straight-tooth and helical-tooth internal gears, wherein the workpieces have outer and inner rabbets. The outer and inner rabbets of the existing workpiece are also commonly detected by a common normal micrometer and an inner measuring micrometer; detecting the distance between straight-tooth internal gears across rods, namely detecting the distance between a common round rod and a digital display caliper; detecting the cross-rod distance of the helical gear, namely detecting by using a short round rod and a digital display caliper; the problems of large detection workload and low detection efficiency exist. In view of this, the following technical solutions are proposed.

SUMMERY OF THE UTILITY MODEL

The technical problems solved by the utility model are as follows: the utility model provides a common normal limit gauge, with the help of current block gauge, combine adjustable limit gauge design, solve the gear common normal technical problem that measurement of efficiency is low.

The technical scheme adopted by the utility model is as follows: the common normal line limit gauge is provided with an upper main plate and a lower bottom plate which are horizontal and parallel at an upper-lower interval, supporting blocks with equal height are respectively arranged between two ends of the upper main plate and the lower bottom plate, and the supporting blocks are connected with the upper main plate and the lower bottom plate into a whole; the right side surface of the support block body at the leftmost side is vertical to the horizontal plate bodies of the upper main plate and the lower bottom plate; a plurality of mounting holes are formed in the length direction of the upper main board body; different mounting holes are sequentially used for mounting and fixing the measuring arm, the block gauge, the through and stop measuring arm and the adjusting block from left to right; the adjusting block is vertical to the upper main plate and the lower bottom plate body; the adjusting block body is provided with a horizontally arranged jackscrew, the jackscrew penetrates out of the left side of the adjusting block body, and the jackscrew penetrating end is used for pressing the fixed measuring arm, the block gauge and the through-and-off measuring arm to the right side of the left adjusting block and enabling the fixed measuring arm and the through-and-off measuring arm to contact the inner side of the block gauge to form a measuring surface; replacing block gauges with different sizes for adjusting the distance between the fixed measuring arm and the on-off measuring arm; the fixed measuring arm and the through-and-off measuring arm are arranged in a left-right axial symmetry mode, have the same structure and the same extension length, and the measuring surfaces of the fixed measuring arm and the through-and-off measuring arm are perpendicular to the upper main plate and the lower bottom plate at the same time; the fixed measuring arm and the through-stop measuring arm are used for detecting the size of the workpiece.

In the above technical solution, preferably: the upper main board and the lower bottom board have the same structure and are strip-shaped boards; the lower base plate is also provided with a mounting hole, and the mounting hole of the lower base plate is coaxially opposite to the mounting hole of the upper main plate.

In the above technical solution, preferably: the mounting hole is the round hole, and the round hole on last mainboard and the lower plate has two respectively, and two are listed as the round hole and extend and the parallel evenly distributed of interval along last mainboard and lower plate length direction respectively, and the centre-to-centre spacing of the adjacent round hole of extending along last mainboard and lower plate body length direction is 10 ~ 15 mm.

In the above technical solution, preferably: the supporting block and the adjusting block are the same in structure, the thicknesses of the supporting block and the adjusting block are the same and are of cuboid structures, and vertical, coaxial and opposite threaded holes I are formed in the upper end face and the lower end face of the supporting block respectively; the supporting block body at the leftmost side is provided with a vertical supporting block pin hole; the support block pin is coaxially matched with the support block pin hole so as to ensure the verticality of the leftmost support block relative to the horizontal plate bodies of the upper main plate and the lower bottom plate; the upper end surface and the lower end surface of the adjusting block are respectively provided with a vertical, coaxial and opposite threaded hole II; the upper main plate and the lower bottom plate are provided with vertical threaded holes III; the fastening screws fasten the upper main plate and the lower bottom plate with the supporting block or the adjusting block into a whole.

In the above technical solution, preferably: the two jackscrews are identical in structure, parallel at intervals and vertical to the adjusting block and are arranged horizontally, and are also arranged symmetrically relative to the horizontal central lines of the upper main plate and the lower bottom plate; the adjusting block is provided with two horizontal threaded through holes which are parallel at intervals; the jackscrew is screwed with the horizontal thread through hole, and the jackscrew penetrating end is used for vertically locking the position of the through-stop measuring arm.

In the above technical solution, further: the fixed measuring arm and the through-stop measuring arm are provided with vertical pin holes; a stop pin is coaxially arranged in the pin hole; the stop pin abuts against the outer vertical end face of the upper main plate so as to enable the fixed measuring arm and the through measuring arm to be equal in protruding length of the through measuring arm protruding out of the measuring end.

In the above technical solution, as a technical solution: the fixed measuring arm and the through-stop measuring arm are both in an isosceles trapezoid structure; the upper bottom axes of the isosceles trapezoids are symmetrically arranged at the outer sides, and the lower bottom axes of the isosceles trapezoids are symmetrically arranged at the inner sides; and the fixed measuring arm and the through-stop measuring arm are respectively and vertically intersected with the upper main board and the lower bottom board.

In the above technical solution, as another technical solution: the fixed measuring arm and the through-stop measuring arm are both plate-type cylindrical structures.

In the above technical solution, further: the end part of the plate type cylinder structure is concentrically and coaxially provided with a cylinder measuring structure or a ball head measuring structure with reduced size.

In the above technical solution, further: a cushion block with a cuboid structure is clamped between the through-stop measuring arm and the adjusting block; the cushion block padding size is smaller than the space size of the adjacent mounting holes.

Compared with the prior art, the utility model has the advantages that:

1. the limit gauge is used for production process and final inspection, and can efficiently, quickly and batch detect the length and tolerance of the common normal line of the gear, the dimensional tolerance of the outer spigot and the inner spigot, and the span of the straight gear and the helical gear.

2. The utility model adopts a modular design, realizes high-precision rapid batch detection of the common normal line by clamping the block gauge, has simple structure and high precision, meets the requirement of GB/T1957 on the detection precision, is convenient to finely adjust, has short manufacturing period and low cost, meets the requirement of field batch detection, is reliable in detection, and is economical and practical.

3. The gauge is combined with the block gauge, and the adjustable detection of the common normal lines with different sizes is realized by increasing, decreasing, combining and clamping the block gauge, so that the gauge has ideal universality.

Drawings

FIG. 1 is a front view of a first embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a front view of the measuring arm;

FIG. 4 is a perspective view of the adjustment block of the embodiment of FIG. 1;

FIG. 5 is a front view of a second embodiment of the present invention;

FIG. 6 is a top view of FIG. 5;

FIG. 7 is a front view of the embodiment of FIG. 5 with the measurement arm fixed or open-close;

FIG. 8 is a front view of a third embodiment of the present invention;

FIG. 9 is a top view of FIG. 8;

FIG. 10 is a front view of the embodiment of FIG. 8 with the measurement arm fixed or open-close;

fig. 11 is a front view of a fourth embodiment of the present invention;

FIG. 12 is a top view of FIG. 11;

FIG. 13 is a front view of the embodiment of FIG. 11 with the measurement arm fixed or open-ended;

in the figure: 1-upper main board, 101-screw hole III; 2-lower bottom plate, 3-supporting block, 301-threaded hole I and supporting block pin 302; 4-mounting hole, 5-adjusting block, 501-horizontal thread through hole, 502-thread hole II; 6-top thread, 7-fixed measuring arm, 8-block gauge and 9-through and stop measuring arm; 10-fastening screw, 11-pin hole, 12-stop pin; 13-cylinder measuring structure, 14-bulb measuring structure and 15-cushion block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 13 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

(as shown in fig. 2) the common normal line limit gauge has an upper main plate 1 and a lower base plate 2 which are horizontal and parallel with each other at intervals, and the upper main plate 1 and the lower base plate 2 are parallel with each other at intervals, so as to provide a base support for the gauge and facilitate hand holding.

Supporting blocks 3 with the same height are respectively arranged between the two ends of the upper main plate 1 and the lower bottom plate 2, and the supporting blocks 3 with the same height are equal to ensure the levelness of the upper main plate 1 and the lower bottom plate 2.

The supporting block 3 is connected with the upper main plate 1 and the lower bottom plate 2 into a whole, and the connected structure generally comprises a detachable connected structure and a welded connected structure.

The utility model preferably has a detachable and integrated structure, and compared with a welding structure, the utility model facilitates the modular combination and processing of the measuring tool, ensures the requirement of connection precision and avoids the problem of welding deformation.

In the above embodiment, preferably: the upper main plate 1 and the lower bottom plate 2 have the same structure and are strip-shaped plate bodies; the structure is the same, convenient processing, and need not to distinguish mainboard and lower plate.

Wherein, the block right flank of 3 supporting shoes on leftmost is perpendicular to the upper plate 1 and the lower plate 2 horizontal plate body to guarantee follow-up fixed measuring arm 7, block 8, lead to and end measuring arm 9, the straightness that hangs down of regulating block 5 relative upper plate 1 and lower plate 2 plate body.

A plurality of mounting holes 4 are formed in the length direction of the plate body of the upper main plate 1. Similarly, the lower base plate 2 is also provided with a mounting hole 4, and the mounting hole 4 of the lower base plate 2 is coaxially opposite to the mounting hole 4 of the upper main plate 1 up and down, so that the precision requirement of the measuring tool after assembly is ensured.

In the above embodiment, preferably: the mounting holes 4 are round holes, the round holes in the upper main plate 1 and the lower bottom plate 2 are respectively provided with two rows, the two rows of round holes are respectively arranged along the length direction of the upper main plate 1 and the lower bottom plate 2 in an extending mode, and the adjacent round holes are evenly distributed at intervals in a parallel mode.

Preferably: the center distance of adjacent round holes extending along the length direction of the upper main plate 1 and the lower bottom plate 2 is 10-15 mm.

In the two rows of mounting holes 4 of the upper main plate 1 or the lower main plate 2, as shown in fig. 1, a central line of every two adjacent and vertically opposite mounting holes 4 at the upper and lower positions is perpendicular to a horizontal central line of the upper main plate 1 or the lower main plate 2.

Different mounting holes 4 are used for mounting and fixing the measuring arm 7, the block gauge 8, the through and stop measuring arm 9 and the adjusting block 5 from left to right in sequence.

The adjusting block 5 is installed perpendicular to the upper main plate 1 and the lower plate 2.

Specifically, the mounting hole 4 is tightly mounted using a fastening screw 10 described later and is indexed to adjust the mounting position of the block 5.

In the above embodiment, preferably: (as shown in fig. 4), the supporting block 3 and the adjusting block 5 have the same structure, the same thickness and the same cuboid structure.

The upper end surface and the lower end surface of the supporting block 3 are respectively provided with a vertical, coaxial and opposite threaded hole I301; four corners of the upper main plate 1 and the lower bottom plate 2 are respectively provided with a vertical threaded hole III 101; the threaded hole III 101 is coaxially opposite to the threaded hole I301, and the supporting block 3, the upper main plate 1 and the lower base plate 2 are fastened and connected into a whole by using a fastening screw 10 so as to be quickly positioned and assembled and installed at high precision.

To ensure the perpendicularity of the leftmost support block 3: the block body of the supporting block 3 at the leftmost side is provided with a vertical supporting block pin hole; the support block pins 302 are coaxially fitted with the support block pin holes to ensure the perpendicularity of the leftmost support block 3 with respect to the horizontal plate bodies of the upper main plate 1 and the lower base plate 2.

In the same way: the upper end face and the lower end face of the adjusting block 5 are respectively provided with a vertical, coaxial and opposite threaded hole II 502; the threaded hole II 502 is coaxially opposite to the mounting holes 4 of the upper main plate 1 and the lower base plate 2, and the upper main plate 1, the lower base plate 2 and the adjusting block 5 are fastened and connected into a whole by using a fastening screw 10. And mounting holes 4 at different positions are used for adjusting the position of the adjusting block 5, so that the supporting position of a jackscrew 6 described later is adjusted.

The upper main plate 1, the lower bottom plate 2 and the supporting block 3 or the adjusting block 5 are connected by the upper fastening screw 10 and the lower fastening screw 10, so that the measuring tool is firm and reliable in combination and installation, and meets the precision requirement.

After the position of the adjusting block 5 is selected, the block body of the adjusting block 5 is vertically screwed and matched with the mounting jackscrew 6. The jackscrew 6 penetrates out of the left side of the block body of the adjusting block 5, and the penetrating end of the left side of the jackscrew 6 is used for pressing the fixed measuring arm 7, the block gauge 8 and the through-stop measuring arm 9 to the right side of the right vertical side face of the adjusting block 5 on the left side, so that the fixed measuring arm 7 and the through-stop measuring arm 9 contact the inner side face of the block gauge 8 to form a measuring surface; the distance between the fixed measuring arm 7 and the universal measuring arm 9 can be adjusted by changing different sizes of the block gauge 8.

In the above embodiment (as shown in fig. 1), preferably: the two jackscrews 6 are identical in structure, parallel at intervals and vertical to the adjusting block 5 and are horizontally arranged, and the two jackscrews 6 are also symmetrically arranged relative to the horizontal central lines of the upper main plate 1 and the lower main plate 2; so as to ensure the connection reliability and the uniformity of the jacking force application of the jackscrew 6.

Corresponding to the jackscrew: the adjusting block 5 is provided with two horizontal threaded through holes 501 which are parallel at intervals; the jackscrew 6 is matched with the horizontal thread through hole 501 in a screwing mode, and the penetrating end of the jackscrew 6 is used for vertically locking the position of the through-stop measuring arm 9.

When in use: according to the required detection size, selecting the proper number of the block gauges 8 and the lengths of the block gauges 8 to be combined randomly, clamping the plurality of combined block gauges 8 with the selected combined length between a fixed measuring arm 7 and a through-stop measuring arm 9, pressing and fixing the positions of the through-stop measuring arm 9 by using a jackscrew 6, enabling the left side of the fixed measuring arm 7 to be close to the right side of a left supporting block 3, clamping and locking the positions of the fixed measuring arm 7, the block gauges 8 and the through-stop measuring arm 9 between the left supporting block 3 and the jackscrew 6, determining the distance between the fixed measuring arm 7 and the through-stop measuring arm 9, and enabling the distance between the fixed measuring arm 7 and the through-stop measuring arm 9 to be used for efficiently detecting whether the size of the workpiece to be detected meets the requirement in batches.

It can be seen that the spacing between the fixed measuring arm 7 and the universal measuring arm 9 can be adjusted by replacing different sizes of gauge blocks 8.

In the embodiment shown in fig. 1, when the distance between the ends of the workpiece is 45mm, two blocks 8 of 40mm +5mm are selected to be placed in the gauge and then the jackscrew 6 is locked for use.

The fixed measuring arm 7 and the through-and-stop measuring arm 9 are arranged in a left-right axial symmetry mode, have the same structure and the same extending length, and have the same functions as a fixed arm and a sliding arm of a micrometer, so that the micrometer is convenient to process, assemble and detect with high precision.

On the basis, the measuring surfaces of the fixed measuring arm 7 and the through-and-off measuring arm 9 are perpendicular to the horizontal plate bodies of the upper main plate 1 and the lower main plate 2 at the same time, so that the detection precision is ensured.

Namely the fixed measuring arm 7 and the open-close measuring arm 9 are used for detecting whether the size of the workpiece meets the requirement.

It should be noted that: measuring the outer dimension according to the definition of the limit gauge, wherein the maximum entity dimension of the element to be measured is the through end of the limit gauge; the smallest physical dimension is the end stop of the limit gauge. Therefore, the block gauge size of the gauge is spliced according to the minimum entity size of the measured element: the through end is determined by the size difference between the upper part and the lower part of the right through end measuring arm 9 and is larger than the size of the through end, namely the upper part of the gauge is a through gauge, and the lower part of the gauge is a no-go gauge. The block gauge 8 with different sizes is replaced to adjust the distance between the fixed measuring arm 7 and the through-stop measuring arm 9 so as to adapt to the measurement of different common normal line sizes. And the tolerance of the measured element is determined by the size difference of the open-close ends of the open-close measuring arms 9.

In the above embodiment, further: in order to solve the problem of how to position the fixed measuring arm 7 and the on-off measuring arm 9 when being installed: the fixed measuring arm 7 and the through and stop measuring arm 9 are provided with vertical pin holes 11; the pin hole 11 is vertical to the horizontal planes of the fixed measuring arm 7 and the through and stop measuring arm 9; the pin hole 11 is coaxially and concentrically provided with a stop pin 12; the accuracy of the pin hole 11 and the stop pin 12 meets the coaxial concentricity requirement. The stop pin 12 abuts against the outer vertical end face of the upper main plate 1 so as to enable the fixed measuring arm 7 and the through measuring arm 9 to be equal in protruding length from the measuring end.

When the measuring arm is used, when the fixed measuring arm 7 and the through and stop measuring arm 9 in corresponding shapes need to be replaced and installed, the fixed measuring arm 7 and the through and stop measuring arm 9 can be quickly positioned and installed with the same extending length, so that the assembling difficulty is reduced, and the use precision is ensured.

On the basis of the above steps: regarding the specific embodiments of the fixed measuring arm 7 and the open-close measuring arm 9, in order to meet the detection requirements of different occasions, different shapes of the fixed measuring arm 7 and the open-close measuring arm 9 need to be designed, and regarding the specific embodiments of the fixed measuring arm 7 and the open-close measuring arm 9, the following are provided:

example 1:

the fixed measuring arm 7 and the through-stop measuring arm 9 (shown in fig. 1, 2 and 3) are both in an isosceles trapezoid structure; the upper bottom axes of the isosceles trapezoids are symmetrically arranged at the outer sides, and the lower bottom axes of the isosceles trapezoids are symmetrically arranged at the inner sides; and the fixed measuring arm 7 and the through-stop measuring arm 9 are respectively and vertically intersected with the upper main board 1 and the lower bottom board 2. When the rapid measuring device is used, the batch efficient rapid measurement of the workpieces can be realized as long as the combined length of the block gauges 8 is determined to be equal to the length of the workpieces to be detected.

Example 2:

(as shown in fig. 5, 6 and 7) the fixed measuring arm 7 and the through-and-off measuring arm 9 are both plate-type cylindrical structures. The plate-type cylindrical structure means that: the exposed measuring extending end is of a cylindrical structure, the part of the exposed measuring extending end clamped by the jackscrew 6 is of a plate structure, and the cylindrical structure and the plate structure are integrally formed. When the measuring device is used, the size of a workpiece to be measured can be equal to the size of the workpiece to be measured after the total diameter of the fixed measuring arm 7 and the through-stop measuring arm 9 of the cylinder structure is added to the combined length of the block gauge 8, and the batch high-efficiency rapid measurement of the workpiece can be realized.

Example 3:

(as shown in fig. 8, 9 and 10) the fixed measuring arm 7 and the through-and-out measuring arm 9 are both plate-type cylindrical structures; the two ends of the shaft end of the plate type cylinder structure are concentrically and coaxially provided with cylinder measuring structures 13 with reduced sizes. The cylinder measuring structure 13 is used for measuring the workpiece dimensions. When the measuring tool is used, the size of a workpiece to be measured can be equal to the size of the workpiece to be measured only by adding the diameter of a cylindrical structure and the diameter of a cylindrical measuring structure 13 to the combined length of the block gauge 8, and the workpiece can be measured efficiently and quickly in batches, and has a double-head detection function.

Example 4:

(as shown in fig. 11, 12 and 13) the fixed measuring arm 7 and the through-stop measuring arm 9 are both in a plate-type cylindrical structure; the ends of the plate-shaped cylindrical structure are concentrically and coaxially provided with ball head measuring structures 14 with reduced sizes. When the measuring device is used, the size of a workpiece to be measured can be equal to the size of the workpiece to be measured after the diameter of a cylindrical structure and the diameter of a ball head measuring structure 14 are added to the combined length of the block gauge 8, batch high-efficiency and quick measurement of the workpiece can be realized, and the measuring device has a double-head detection function. The embodiment is suitable for measuring the sizes of the inner spigot and the outer spigot, the round bar pitch of the inner gear and the ball span pitch of the inner bevel gear.

In the above embodiment, further: a cushion block 15 with a cuboid structure is clamped between the through-stop measuring arm 9 and the adjusting block 5; the padding size of the padding block 15 is smaller than the space size of the adjacent mounting holes 4, and the padding block 15 is added between the outer side of the stop-go measuring arm 9 and the inner side of the jackscrew 6, so that the screwing stroke of the jackscrew 6 is shortened and reduced, and the efficiency of detection and adjustment operation is further improved.

The working principle of the utility model is as follows: (as in the embodiment of fig. 1) selecting the block gauge 8 with proper size and quantity according to the size of the workpieces needing batch detection for combination. If the size of the end stop of the detected workpiece is 45 mm: selecting a block gauge 40 with the size of 40mm and a block gauge with the size of 5mm for combination, simultaneously combining the two block gauges 8 side by side and plugging the two block gauges between a fixed measuring arm 7 and a through-stop measuring arm 9, then screwing and adjusting a jackscrew 6, and abutting the end surface of the left side of the jackscrew 6 against the end surface of the outer side of the through-stop measuring arm 9; when the gauge is plugged into the spacer 15: then support tight cushion 15 outside end face with jackscrew 6 left side terminal surface, the tight outside end face that leads to only measuring arm 9 of rethread cushion 15 medial surface to locking fixed measuring arm 7 and leading to only measuring arm 9's interval, fixed measuring arm 7 this moment and the interval that leads to only measuring arm 9 equal the size of the work piece that awaits measuring just: then, using the fixed measuring arm 7 and the go-no measuring arm 9 as measuring heads, and comparing whether the size of the detected workpiece is qualified or not; the general gauge end passes through the gauge, and the rail stopping end is qualified if not. The block gauge 8 is a known existing high-precision measuring tool, so that the detection precision can be accurate to percentile and kilominute; the block gauges 8 with different numbers and lengths are added, decreased and combined, so that the detection requirements of various workpiece sizes can be met. The measuring tool can be adaptively adjusted to detect the maximum size by replacing the mounting positions of the mounting adjusting blocks 5 in different mounting holes 4, so that the detection efficiency and the assembly efficiency of the measuring tool are rapidly improved, and the detection precision requirement of the measuring tool is ensured.

Through the above description, it can be found that: the limit gauge is used for production process and final inspection, and can efficiently, quickly and batch detect the length and tolerance of the common normal line of the gear, the dimensional tolerance of the outer spigot and the inner spigot, and the span of the straight gear and the helical gear.

Moreover, the utility model adopts a modular design, realizes high-precision and rapid batch detection of the common normal line by clamping the block gauge 8, has simple structure and high precision, meets the requirement of GB/T1957 on detection precision, is convenient to fine tune, has short manufacturing period and low cost, meets the requirement of field batch detection, and is reliable in detection, economical and practical.

Finally, the gauge is combined with the existing block gauge 8 measuring tool, and adjustable assembly and detection of common normal lines of different sizes are realized by increasing, decreasing, combining and clamping block gauges 8 of different sizes and combined numbers, so that the universality is ideal.

In conclusion, the gauge can be quickly adjusted to measure the size, the adjustment is convenient and quick, and the length and the tolerance of the gear common normal line can be efficiently measured; the method is also suitable for detecting the outer and inner rabbets of the workpiece, the span rod distance of the straight-tooth and helical-tooth inner gears, the detection precision meets the requirement of GB/T1957, the detection efficiency is greatly improved, the product completion progress is accelerated, and the method has a good effect.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on differences from other embodiments.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. A common normal line limit gauge is characterized in that: the device is provided with an upper main board (1) and a lower bottom board (2) which are horizontal and parallel at an upper-lower interval, supporting blocks (3) with equal height are respectively arranged between two ends of the upper main board (1) and the lower bottom board (2), and the supporting blocks (3) are connected with the upper main board (1) and the lower bottom board (2) into a whole; the right side surface of the block body of the leftmost supporting block (3) is vertical to the horizontal plate bodies of the upper main plate (1) and the lower bottom plate (2); a plurality of mounting holes (4) are formed in the length direction of the upper main board (1); different mounting holes (4) are sequentially used for mounting and fixing the measuring arm (7), the block gauge (8), the through-stop measuring arm (9) and the adjusting block (5) from left to right; the adjusting block (5) is vertical to the plate bodies of the upper main plate (1) and the lower bottom plate (2); the adjusting block (5) is provided with a horizontally arranged jackscrew (6) in a block body, the jackscrew (6) penetrates out of the left side of the adjusting block (5) block body, and the penetrating end of the jackscrew (6) is used for pressing a fixed measuring arm (7), a block gauge (8) and a through-stop measuring arm (9) to the right side of the right vertical side of the left adjusting block (5), so that the fixed measuring arm (7) and the through-stop measuring arm (9) contact the inner side of the block gauge (8) to form a measuring surface; the block gauges (8) with different sizes are replaced to adjust the distance between the fixed measuring arm (7) and the through and stop measuring arm (9); the fixed measuring arm (7) and the through-and-off measuring arm (9) are arranged in a left-right axial symmetry mode, have the same structure and the same extension length, and the measuring surfaces of the fixed measuring arm (7) and the through-and-off measuring arm (9) are perpendicular to the upper main plate (1) and the lower base plate (2) at the same time; the fixed measuring arm (7) and the through-and-out measuring arm (9) are used for detecting the size of a workpiece.

2. The common normal limit gauge of claim 1, wherein: the upper main board (1) and the lower bottom board (2) have the same structure and are strip-shaped boards; the lower base plate (2) is also provided with a mounting hole (4), and the mounting hole (4) of the lower base plate (2) is coaxially opposite to the mounting hole (4) of the upper main plate (1) up and down.

3. The common normal limit gauge of claim 1 or 2, wherein: the mounting holes (4) are round holes, the round holes on the upper main plate (1) and the lower bottom plate (2) are respectively provided with two rows, and the two rows of round holes respectively extend along the length direction of the upper main plate (1) and the lower bottom plate (2) and are uniformly distributed at intervals in parallel; the center distance of adjacent round holes extending along the length direction of the plate bodies of the upper main plate (1) and the lower bottom plate (2) is 10-15 mm.

4. The common normal limit gauge of claim 1, wherein: the supporting block (3) and the adjusting block (5) are the same in structure, the thicknesses of the supporting block and the adjusting block are the same and are of cuboid structures, and the upper end face and the lower end face of the supporting block (3) are respectively provided with a vertical threaded hole I (301) which is coaxially opposite; the block body of the supporting block (3) at the leftmost side is provided with a vertical supporting block pin hole; the supporting block pin (302) is coaxially matched with the supporting block pin hole so as to ensure the verticality of the leftmost supporting block (3) relative to the horizontal plate bodies of the upper main plate (1) and the lower base plate (2); the upper end face and the lower end face of the adjusting block (5) are respectively provided with a vertical, coaxial and opposite threaded hole II (502); the upper main plate (1) and the lower bottom plate (2) are provided with vertical threaded holes III (101); the fastening screws (10) fasten the upper main plate (1) and the lower bottom plate (2) with the supporting block (3) or the adjusting block (5) into a whole.

5. The common normal limit gauge of claim 1, wherein: the two jackscrews (6) are of the same structure, are parallel at intervals and are simultaneously and horizontally arranged perpendicular to the adjusting block (5), and the two jackscrews (6) are also symmetrically arranged relative to the horizontal central lines of the upper main plate (1) and the lower main plate (2); the adjusting block (5) is provided with two horizontal threaded through holes (501) which are parallel at intervals; the jackscrew (6) is screwed with the horizontal thread through hole (501), and the penetrating end of the jackscrew (6) is used for vertically locking the position of the through-stop measuring arm (9).

6. The common normal limit gauge of claim 1, wherein: the fixed measuring arm (7) and the through-stop measuring arm (9) are provided with vertical pin holes (11); the pin hole (11) is coaxially provided with a stop pin (12); the stop pin (12) abuts against the outer vertical end face of the upper main plate (1) so that the fixed measuring arm (7) and the through-stop measuring arm (9) are equal in protruding length of the protruding measuring end.

7. The common normal limit gauge of claim 1 or 6, wherein: the fixed measuring arm (7) and the through-stop measuring arm (9) are both in an isosceles trapezoid structure; the upper bottom axes of the isosceles trapezoids are symmetrically arranged at the outer sides, and the lower bottom axes of the isosceles trapezoids are symmetrically arranged at the inner sides; and the fixed measuring arm (7) and the through-and-stop measuring arm (9) are respectively vertically intersected with the upper main board (1) and the lower bottom board (2).

8. The common normal limit gauge of claim 1 or 6, wherein: the fixed measuring arm (7) and the through-and-stop measuring arm (9) are both in a plate-type cylindrical structure.

9. The common normal limit gauge of claim 8, wherein: the end part of the plate-type cylindrical structure is concentrically and coaxially provided with a cylindrical measuring structure (13) or a ball head measuring structure (14) with reduced size.

10. The common normal limit gauge of claim 1, 5 or 6, wherein: a cushion block (15) with a cuboid structure is clamped between the through-stop measuring arm (9) and the adjusting block (5); the padding size of the padding block (15) is smaller than the space size of the adjacent mounting holes (4).