CN210220921U

CN210220921U - High-precision inner diameter measuring instrument

Info

Publication number: CN210220921U
Application number: CN201921424626.XU
Authority: CN
Inventors: Qiantai Qin; 秦乾泰; Jiyong Luo; 罗纪勇; Tianmiao Liu; 刘天妙
Original assignee: Precision Huanyu Hardware Shenzhen Co Ltd
Current assignee: Precision Huanyu Hardware Shenzhen Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-03-31
Anticipated expiration: 2029-08-29

Abstract

The utility model relates to a high accuracy internal diameter measuring apparatu has solved when current internal diameter measuring apparatu uses and need calculate the problem that reachs the error value and make mistakes easily. The measuring instrument comprises a base, wherein an installation block is arranged on the base, a telescopic groove is formed in the installation block, a sliding rod penetrates through the telescopic groove in a sliding mode, and one end of the sliding rod penetrates through the installation block and is provided with the measuring instrument. The one end that the measuring meter was kept away from to the slide bar is provided with the reference column, is provided with the fixed column on the installation piece, and the cover is equipped with compression spring on the slide bar, and compression spring butt has the fixed block in the inner wall in flexible groove, slidable mounting on the base. The utility model discloses an initial distance between slip fixed block adjustment reference column and the fixed column establishes the outside at reference column and fixed column with the work piece cover, if the hole size of work piece is less than standard size, compression spring can be compressed, and the reading of measuring gauge is the error value of part this moment, can directly judge the error value of part, avoids calculating to make mistakes.

Description

High-precision inner diameter measuring instrument

Technical Field

The utility model belongs to the technical field of the technique of measuring instrument and specifically relates to a high accuracy internal diameter measuring apparatu is related to.

Background

With the development and progress of the industry, the precision requirement of the industrial production on hardware parts is higher and higher, and in the production process of some ring parts and parts with open holes, in order to ensure good matching between the parts, the requirement of the size of an inner hole is more precise, but errors inevitably occur in the production process, and small errors are generally allowed to exist in the range of realizing the normal operation of the parts.

In order to avoid the problem that the parts cannot be matched, the parts are generally required to be measured after being produced, the size of the parts is ensured to be within the usable range, and the parts with unqualified sizes are reworked. Generally, an inner hole of a part is measured through an inner diameter measuring instrument, the inner diameter measuring instrument mainly comprises a base, a fixing column and a positioning column which are arranged on the base, and a measuring meter which is arranged on the base, a sliding rod penetrates through the fixing column and the positioning column in a sliding mode, a spring is sleeved on the sliding rod, the inner hole of the part is sleeved outside the fixing column and the positioning column, the spring is compressed, a pointer of the measuring meter can rotate according to the compressed distance of the spring, and the diameter of the inner hole of the part is determined according to reading.

In order to avoid looseness during installation of inner holes of some parts, the size needs to be smaller during production, in order to ensure that normal use is not affected, the smaller size is required to be within a certain range, an existing inner diameter measuring instrument generally displays actual reading of the diameter of the inner hole of the part, an operator can obtain an error value by subtracting data of a standard diameter, and unqualified parts can flow into the market due to calculation errors during long-time measurement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high accuracy internal diameter measuring apparatu, its advantage lies in: the error value of the inner hole of the part can be directly read according to the data on the measuring meter, and whether the part is qualified or not can be conveniently confirmed.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a high-precision internal diameter measuring instrument, includes the base, be provided with the installation piece on the base, flexible groove has been seted up on the installation piece, slide in the flexible groove and wear to be equipped with a slide bar, the one end of slide bar run through in the installation piece just installs along with the measurement meter that the slide bar translation changes, the slide bar is kept away from the one end of measurement meter is provided with the reference column, be provided with the fixed column on the installation piece, the cover is equipped with compression spring on the slide bar, the compression spring butt in the inner wall in flexible groove, slidable mounting has a fixed block on the base, the bottom of fixed block is provided with the slider, the spout has been seted up on the base, the slider slides to inlay and locates in the spout, the fixed block is.

By adopting the technical scheme, when the inner hole of the part is measured, the fixed block is slid, the slide rod is inserted into the measuring meter in a sliding manner, the pressure spring is compressed, the distance between the fixed column and the positioning column is adjusted to be consistent with the standard size of the inner hole of the part, the fixed block is fixed through the fixing component, and then the slide rod is fixed;

then, the measuring meter is zeroed, the positioning column is pushed to move towards the direction close to the fixing column, the pressure spring is further compressed, the part to be measured is sleeved on the outer sides of the positioning column and the fixing column, and the positioning column moves towards the direction far away from the fixing column under the action force of the pressure spring and abuts against the inner wall of the workpiece to be measured;

when the diameter of the inner hole of the workpiece is equal to that of the standard part, the pointer of the measuring gauge is positioned at the zero scale mark, and when the diameter of the inner hole of the workpiece is smaller than that of the standard part, the reading of the measuring gauge is the error value between the part and the standard part, so that the error value of the part can be directly judged, and calculation errors can be avoided; the sliding arrangement of the fixed block is convenient for adjusting the initial distance between the fixed column and the positioning column according to different types of parts.

The utility model discloses further set up to: the fixing assembly comprises a fixing plate and a fixing bolt, the fixing plate and the fixing bolt are arranged on two sides of the fixing block in a penetrating mode, the fixing bolt is arranged on the base in a penetrating mode, and the fixing bolt is arranged in the fixing groove in a penetrating mode.

Through adopting above-mentioned technical scheme, after the position of adjusting the fixed block, screw fixing bolt and make the fixed plate firmly butt in the upper surface of base, prevent that the fixed block from taking place to slide and causing the influence to the measurement among the measurement process.

The utility model discloses further set up to: the slide bar is close to the one end of reference column is connected with the ejector pad, the spacing groove has been seted up to the both sides in flexible groove, the both sides of ejector pad slide respectively to inlay and locate two the spacing inslot, the ejector pad is back to one side of slide bar is connected with a push rod, the push rod slides and wears to locate the fixed block.

Through adopting above-mentioned technical scheme, the setting of push rod is convenient for promote the reference column to the direction that is close to the fixed column when measuring, and the operation of being convenient for has avoided handheld reference column to promote and has leaded to the work piece installation inconvenient, and the spacing groove can carry on spacingly to ejector pad slip direction, makes the direction that the push rod promoted keep fixed, prevents to take place the skew.

The utility model discloses further set up to: the push rod is sleeved with a return spring, the return spring is abutted against one side, back to the push block, of the fixed block, and a limiting block is arranged at one end, far away from the push block, of the push rod.

Through adopting above-mentioned technical scheme, when making the reference column remove when promoting the push rod, because reset spring butt in fixed block, reset spring can be compressed this moment, after the work piece is installed, loosens the push rod, and reset spring can resume deformation and drive the push rod and reset, convenient to use.

The utility model discloses further set up to: the limiting block is sleeved on the outer side of the push rod and fixed through a reinforcing bolt.

Through adopting above-mentioned technical scheme, reinforcing bolt can fix the stopper, also is convenient for adjust the position of stopper according to the user demand, also conveniently changes reset spring simultaneously.

The utility model discloses further set up to: the limiting block is provided with a holding rod.

Through adopting above-mentioned technical scheme, the setting of holding rod is convenient for promote the push rod, prevents that the sharp-pointed department on push rod top from causing the injury to the hand.

The utility model discloses further set up to: the positioning column and one side, opposite to the fixing column, of the positioning column are cambered surfaces.

Through adopting above-mentioned technical scheme, the reference column sets up to the cambered surface and can protect the work piece with the fixed column one side that backs on the back, prevents that sharp-pointed department at reference column and fixed column edge from the surface scratch of work piece.

The utility model discloses further set up to: and the positioning column and the top of the fixing column are subjected to fillet treatment.

Through adopting above-mentioned technical scheme, reference column and fixed column top set up to the fillet and can further protect the work piece, prevent the work piece scratch, also can guide the installation of work piece simultaneously, facilitate the use.

To sum up, the utility model discloses a beneficial technological effect does:

1. the sliding arrangement of the fixed block is convenient for adjusting the initial distance between the fixed column and the positioning column according to different types of parts, the reading of the measuring meter is the error value between the part and the standard part during measurement, the error value of the part can be conveniently and directly judged, and calculation errors are avoided;

2. the arrangement of the push rod is convenient for pushing the positioning column during measurement, so that inconvenience in workpiece installation caused by pushing by holding the positioning column by hand is avoided, the limiting groove can limit the sliding direction of the push block, the pushing direction of the push rod is kept fixed, and deviation is prevented;

3. the arrangement of the reset spring can lead the push rod to automatically reset after the workpiece is installed, thus being convenient for use;

4. the cambered surface arrangement and chamfering treatment of the positioning columns and the fixing columns can protect the workpiece and prevent the surface of the workpiece from being scratched.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure, 1, a base; 11. a chute; 12. fixing grooves; 2. mounting blocks; 21. a telescopic groove; 22. fixing a column; 23. a limiting groove; 3. a slide bar; 31. a measuring meter; 32. a positioning column; 33. a pressure spring; 4. a fixed block; 41. a slider; 42. a fixing plate; 43. fixing the bolt; 5. a push rod; 51. a push block; 52. a return spring; 6. a limiting block; 61. reinforcing the bolt; 62. a holding rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a high-precision internal diameter measuring instrument, including base 1, the welding has an installation piece 2 on the base 1, and the flexible groove 21 of a rectangle is seted up to the upper surface of installation piece 2, and the one end in flexible groove 21 runs through in the lateral wall of installation piece 2. A sliding rod 3 penetrates through the telescopic groove 21 in a sliding mode, one end of the sliding rod 3 is located in the telescopic groove 21, the other end of the sliding rod 3 penetrates through the mounting block 2 and is provided with a measuring meter 31, the sliding rod 3 is inserted into the measuring meter 31 in a sliding mode, and a pointer of the measuring meter 31 can change along with the sliding of the sliding rod 3.

One end of the sliding rod 3, which is positioned in the telescopic groove 21, is vertically welded with a positioning column 32, the upper surface of the mounting block 2 is vertically welded with a fixing column 22, and the cross sections of the positioning column 32 and the fixing column 22 are semicircular and have the same size. One end of the sliding rod 3, which is located in the telescopic slot 21, is sleeved with a pressure spring 33, one end of the pressure spring 33 abuts against the positioning column 32, and the other end of the pressure spring 33 abuts against the inner wall of the telescopic slot 21.

The one end welding that slide bar 3 is close to reference column 32 has a ejector pad 51, and a spacing groove 23 has been seted up respectively to the both sides in flexible groove 21, and the one end that fixed column 22 was kept away from to spacing groove 23 runs through in the lateral wall of installing block 2, and the both sides of ejector pad 51 slide respectively to inlay locates two spacing grooves 23, and one side that push pad 51 is back to slide bar 3 is connected with a push rod 5, and fixed block 4 is worn to locate in the push rod 5 slides. One side of the push rod 5, which is located on the fixed block 4 and back to the push block 51, is sleeved with a return spring 52, one end of the push rod 5, which is away from the push block 51, is sleeved with a limit block 6, and when the return spring 52 is in an unstressed state, two ends of the return spring 52 abut against the fixed block 4 and the limit block 6 respectively.

Install a fixed block 4 on the base 1, the bottom welding of fixed block 4 has a slider 41, has seted up on the base 1 with slider 41 matched with spout 11, through with slider 41 slip inlay locate in spout 11, make fixed block 4 sliding connection in base 1. The both sides of fixed block 4 have welded the fixed plate 42 of a rectangle respectively, and a fixing bolt 43 is worn to be equipped with by the last screw thread of every fixed plate 42, and the fixed slot 12 that runs through in the upper and lower surface of base 1 is seted up respectively to the both sides of spout 11, and two fixed slots 12 are parallel with spout 11, and two fixing bolt 43 wear to locate in two fixed slots 12 respectively.

During measurement, the sliding fixing block 4 slides the sliding rod 3 into the measuring meter 31, the pressure spring 33 is compressed at the moment, the distance between the fixing column 22 and the positioning column 32 is adjusted to be consistent with the standard size of the inner hole of the part, the fixing bolt 43 is screwed, the fixing plate 42 is firmly abutted to the upper surface of the base 1 to fix the fixing block 4, and the sliding rod 3 is limited.

The measuring meter 31 is calibrated to zero, the push rod 5 is pushed, the push block 51 enables the slide rod 3 to slide towards the direction close to the fixed column 22, and the limiting groove 23 can limit the sliding direction of the push block 51 to prevent the push rod 5 from deviating. At this time, the return spring 52 is compressed, the pressure spring 33 is further compressed, then the part to be tested is sleeved outside the positioning column 32 and the fixing column 22, the push rod 5 is loosened, the positioning column 32 moves in the direction away from the fixing column 22 under the action of the pressure spring 33 and abuts against the inner wall of the workpiece to be tested, and the return spring 52 recovers deformation to drive the push rod 5 to reset.

The opposite sides of the positioning column 32 and the fixing column 22 are arc surfaces to protect workpieces, the sharp parts at the edges of the positioning column 32 and the fixing column 22 are prevented from scratching the surfaces of the workpieces, the cross sections of the positioning column 32 and the fixing column 22 are semicircular with the same size, two points which are farthest away from the cross sections of the positioning column 32 and the fixing column 22 can be abutted against the inner walls of the workpieces, and the measuring data are prevented from deviating due to gaps among the positioning column 32, the fixing column 22 and the inner walls of the workpieces. The tops of the positioning columns 32 and the fixing columns 22 are all subjected to fillet treatment, so that the workpieces are further prevented from being scratched.

After the workpiece is installed, when the diameter of the inner hole of the workpiece is equal to that of the standard part, the pointer of the measuring gauge 31 is still located at the zero scale mark, and when the diameter of the inner hole of the workpiece is smaller than that of the standard part, the reading of the measuring gauge 31 is the error value between the part and the standard part, so that the error value between the part and the standard part can be directly judged, and calculation errors are avoided.

The sliding arrangement of the fixing block 4 facilitates adjustment of the initial distance between the fixing column 22 and the positioning column 32 according to different types of parts, measurement of workpieces of different sizes is facilitated, and the fixing bolt 43 can prevent the fixing block 4 from sliding in the measurement process and affecting measurement.

A reinforcing bolt 61 is arranged on the limiting block 6 in a penetrating mode along the horizontal direction threads, the reinforcing bolt 61 is used for fixing the limiting block 6, and the limiting block 6 is firmly connected with the push rod 5 by screwing the fixing bolt 43 and enabling the fixing bolt 43 to abut against the push rod 5. The detachable connection mode of the limiting block 6 is convenient for adjusting the position of the limiting block 6 according to the use requirement, and meanwhile, the replacement of the reset spring 52 is also convenient. The upper surface of stopper 6 still welds perpendicularly and has been used for promoting stopper 6's holding rod 62, conveniently promotes push rod 5, prevents that the sharp-pointed department on push rod 5 top from stabbing the hand.

The implementation principle of the embodiment is as follows: by connecting the fixed block 4 to the base 1 in a sliding manner, during measurement, the fixed block 4 is slid to adjust the distance between the positioning column 32 and the fixed column 22 to be consistent with the standard size of the inner hole of the part to be measured, at the moment, the pressure spring 33 is in a compressed state, and then the workpiece is sleeved on the outer sides of the positioning column 32 and the fixed column 22; when the diameter of the inner hole of the workpiece is equal to that of the standard part, the pointer of the measuring gauge 31 is located at the zero scale mark, and when the diameter of the inner hole of the workpiece is smaller than that of the standard part, the reading of the measuring gauge 31 is the error value between the part and the standard part, so that the error value between the size of the part and the size of the standard part can be directly judged, and calculation errors are avoided.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a high-precision internal diameter measuring instrument, includes base (1), be provided with installation piece (2) on base (1), flexible groove (21) have been seted up on installation piece (2), slide in flexible groove (21) and wear to be equipped with a slide bar (3), the one end of slide bar (3) run through in installation piece (2) and install and follow measurement meter (31) that slide bar (3) translation and change, slide bar (3) are kept away from the one end of measurement meter (31) is provided with reference column (32), be provided with fixed column (22) on installation piece (2), the cover is equipped with compression spring (33) on slide bar (3), compression spring (33) butt in the inner wall of flexible groove (21), its characterized in that: slidable mounting has a fixed block (4) on base (1), the bottom of fixed block (4) is provided with slider (41), spout (11) have been seted up on base (1), slider (41) slip inlays to be located in spout (11), fixed block (4) are fixed through fixed subassembly.

2. A high-precision inside diameter measuring instrument according to claim 1, wherein: the fixing assembly comprises a fixing plate (42) and a fixing bolt (43), the fixing plate (42) and the fixing bolt (43) are arranged on two sides of the fixing block (4) in a penetrating mode, a fixing groove (12) is formed in the base (1), and the fixing bolt (43) is arranged in the fixing groove (12) in a penetrating mode.

3. A high-precision inside diameter measuring instrument according to claim 1, wherein: slide bar (3) are close to the one end of reference column (32) is connected with ejector pad (51), spacing groove (23) have been seted up to the both sides of flexible groove (21), the both sides of ejector pad (51) slide respectively to inlay and locate two in spacing groove (23), ejector pad (51) are dorsad to one side of slide bar (3) is connected with a push rod (5), push rod (5) slide and wear to locate fixed block (4).

4. A high-precision inside diameter measuring instrument according to claim 3, wherein: the push rod (5) is sleeved with a return spring (52), the return spring (52) abuts against the fixed block (4) back to one side of the push block (51), and a limiting block (6) is arranged at one end, far away from the push block (51), of the push rod (5).

5. A high-precision inside diameter measuring instrument according to claim 4, wherein: the limiting block (6) is sleeved on the outer side of the push rod (5) and fixed through a reinforcing bolt (61).

6. A high-precision inside diameter measuring instrument according to claim 4, wherein: the limiting block (6) is provided with a holding rod (62).

7. A high-precision inside diameter measuring instrument according to claim 1, wherein: the opposite sides of the positioning column (32) and the fixing column (22) are arc surfaces.

8. A high-precision inside diameter measuring instrument according to claim 1, wherein: the tops of the positioning columns (32) and the fixing columns (22) are rounded.