A ring inner diameter measuring device

Abstract

The present invention discloses a ring inner diameter measuring device, comprising: a chassis, three slideways and a scale are arranged on the chassis, the three slideways are arranged at an angle of 120 degrees to each other, a slide bar is arranged in each slideway, a slide bar driving device is also arranged on the chassis, the scale bar is located on the side of a slide bar, and a pointer pointing to the scale bar is arranged on the slide bar, a telescopic rod is arranged on the outer end of each slide bar, the telescopic rod has at least two sections, the outermost section on the telescopic rod is the first section, the inner end of the telescopic rod is connected to the outer end of the slide bar, and the telescopic rod is provided with a scale, and the outer end surface of each section except the first section can be used to align with the scale reading on the outer adjacent section to read the reading, and the structure of the telescopic rod also includes a fixing mechanism arranged between each adjacent section that can fix the two adjacent sections together. The above-mentioned ring inner diameter measuring device can greatly improve the accuracy of the measured ring inner diameter.

Description

Technical Field

[0001] The invention relates to the field of ring quality inspection tooling, and in particular to a ring inner diameter measuring device. Background Art

[0002] After the ring is manufactured, its inner diameter needs to be measured to see if it meets the size requirements. Currently, two workers usually hold a tape measure at both ends to measure the inner diameter of the ring. When measuring with a tape measure, it cannot be ensured that the tape measure passes through the center of the ring, so the inner diameter of the ring measured with a tape measure is prone to large errors. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a ring inner diameter measuring device which can accurately measure the inner diameter of the ring.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is: a ring inner diameter measuring device, comprising: a chassis, characterized in that: three horizontally arranged slides and a scale are arranged on the chassis, the three slides are arranged at an angle of 120 degrees to each other, and the axes of the three slides pass through the center of the chassis, and a slide bar that can slide along the slide bar is arranged in each slide bar, and the distances between the outer ends of the three slide bars and the center of the chassis are equal. A slide bar driving device that can drive the three slide bars to extend outwards equidistantly at the same time or to retract inwards equidistantly at the same time is also arranged on the chassis, the scale is located on the side of a slide bar, and a pointer pointing to the scale is arranged on the slide bar, the sliding distance of the slide bar can be read on the scale by the pointer, and on each slide bar A horizontally arranged telescopic rod is provided on the outer end of each of the three telescopic rods, the axes of the three telescopic rods pass through the center of the chassis, the telescopic rod has at least two sections, the outermost section on the telescopic rod is the first section, the inner end of the telescopic rod is connected to the outer end of the slider, the telescopic rod is provided with scales distributed on the sections, the scale readings gradually increase from the outside to the inside, and the outer end surfaces of the remaining sections except the first section can be used to align with the scale readings on the outer adjacent section to read the readings. When the slider does not slide outward and the telescopic rod does not extend except the first section, the scale reading on the first section aligned with the outer end surface of the second section is equal to the distance from the outermost end of the telescopic rod to the center of the chassis, and the structure of the telescopic rod also includes a fixing mechanism arranged between each adjacent section that can fix the two adjacent sections together.

[0005] Furthermore, in the aforementioned device for measuring the inner diameter of a ring, the structure of the slide bar driving device is as follows: a turntable and a turntable driving mechanism that can drive the turntable to rotate are arranged on the chassis, the turntable is located below the three slide bars, and three slide grooves are arranged on the surface of the turntable, the three slide grooves are evenly arranged around the center of the chassis, the three slide grooves are respectively located one-to-one below the three slide bars, the bottom of the three slides are hollowed out, and a boss is arranged on the lower surface of the three slide bars that passes through the slide and is inserted into the corresponding slide groove, the boss will be restricted to the overlapping part of the top projection of the slide groove and the slide, when the turntable rotates forward, the inner sides of the three slide grooves will push the corresponding bosses outward respectively with the rotation, and the overlapping part of the top projection of the slide groove and the slide will also move outward together, so that the three slide bars can respectively extend outward equidistantly along their respective slides at the same time, and then when the turntable rotates reversely, the three slide bars can respectively contract inward equidistantly along their respective slides at the same time.

[0006] Furthermore, the aforementioned device for measuring the inner diameter of a ring, wherein: the structure of the turntable driving mechanism is: a first pulley is arranged on the lower surface of the turntable, a second pulley which can be driven to rotate by a handle is arranged on the chassis, and a belt is wound around the second pulley and the first pulley, so that after the second pulley rotates, it can drive the first pulley to rotate with the turntable.

[0007] Furthermore, in the aforementioned device for measuring the inner diameter of a ring, the structure of the fixing mechanism is as follows: a notch is provided on the side wall of the port of the inner section of two adjacent sections, and a clamp is mounted on the outer side of the notch. After tightening the clamp, the port of the inner section can clamp the outer section, thereby fixing the two adjacent sections together.

[0008] Furthermore, in the aforementioned ring inner diameter measuring device, the three telescopic rods have the same structure and each has four sections.

[0009] Furthermore, the aforementioned device for measuring the inner diameter of a ring, wherein: the structure of the chassis includes: an inverted disc box, three slides are arranged on the top surface of the disc box, the turntable is located in the disc box, and a removable cover for closing the disc box is covered on the lower disc opening of the disc box.

[0010] Furthermore, in the aforementioned ring inner diameter measuring device, the inner end of the telescopic rod and the outer end of the slide bar are hinged.

[0011] Furthermore, in the aforementioned ring inner diameter measuring device, a mounting plate is detachably mounted on the outer end of the slide bar, and the inner end of the telescopic rod is hinged to the mounting plate.

[0012] Furthermore, the aforementioned device for measuring the inner diameter of a ring, wherein: a limit groove running inwards and outwards is provided on both side walls of the slide, and a limit strip running inwards and outwards is provided on both sides of the slide bar, and the limit strips on both sides of the slide bar can prevent the slide bar from detaching from the slide bar in the vertical direction after being inserted into the limit grooves on the corresponding sides respectively.

[0013] The advantages of the present invention are as follows: when measuring the inner diameter of a ring, the center of the chassis of the ring can be automatically focused and moved to the center of the ring, and the inner diameter of the ring can be obtained by quickly adding the scale reading on the telescopic rod and the reading on the scale, thereby greatly improving the accuracy of the measured inner diameter of the ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a ring inner diameter measuring device according to the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of the ring inner diameter measuring device from one perspective after the explosion.

[0016] Figure 3 This is a schematic diagram of the structure of the ring inner diameter measuring device from another perspective after the explosion. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with specific embodiments and drawings.

[0018] like Figure 1 , Figure 2 , Figure 3As shown, a ring inner diameter measuring device comprises: a chassis 1, on which are arranged three horizontally arranged slideways 11 and a scale 12, the three slideways 11 are arranged at an angle of 120 degrees to each other, and the axes of the three slideways 11 pass through the center of the chassis 1, each slideway 11 is provided with a slide bar 2 that can slide along the slideway 11, and the distances between the outer ends of the three slide bars 2 and the center of the chassis 1 are equal, and the chassis 1 is also provided with a slide bar driving device that can drive the three slide bars 2 to extend outwardly equidistantly at the same time or to retract inwardly equidistantly at the same time, the scale 12 is located on the side of a slide bar 2, and a pointer 13 pointing to the scale 12 is provided on the slide bar 2, and the sliding distance of the slide bar 2 can be read on the scale 12 through the pointer 13, and a horizontally arranged telescopic rod 3 is provided on the outer end of each slide bar 2, and the three The axes of the telescopic rods 3 all pass through the center of the chassis 1. The three telescopic rods 3 have the same structure and all have four sections. The outermost section on the telescopic rod 3 is the first section 31, and then the second section 32, the third section 33, and the fourth section 34 are arranged in sequence inwardly. The inner end of the telescopic rod 3 is connected to the outer end of the slide bar 2. The telescopic rod 3 is provided with scales distributed on the sections, and the scale readings gradually increase from the outside to the inside. Except for the first section 31, the outer end surfaces of the remaining sections can be used to align with the scale readings on the outer adjacent section to read the readings. When the slide bar 2 does not slide outward and the telescopic rod 3 does not extend except the first section 31, the scale reading on the first section 31 aligned with the outer end surface of the second section 32 is equal to the distance from the outermost end of the telescopic rod 3 to the center of the chassis 1. The structure of the telescopic rod 3 also includes a fixing mechanism arranged between each adjacent section that can fix the two adjacent sections together.

[0019] When the second section 32 is not extended, the scale reading on the second section 32 aligned with the outer end surface of the third section 33 is equal to the maximum scale reading on the first section 31; when the third section 33 is not extended, the scale reading on the third section 33 aligned with the outer end surface of the fourth section 34 is equal to the maximum scale reading on the second section 32; there is no scale on the fourth section 34.

[0020] In this embodiment, the structure of the slide driving device is as follows: a turntable 5 and a turntable driving mechanism capable of driving the turntable 5 to rotate are arranged on the chassis 1, the turntable 5 is located below the three slide bars 2, three slide grooves 51 are arranged on the surface of the turntable 5, the three slide grooves 51 are evenly arranged around the center of the chassis 1, the three slide grooves 51 are respectively located one by one below the three slide bars 2, the bottom of the three slideways 11 are hollowed out, and a slide 11 is inserted into the corresponding slide groove 5 through the slideway 11 on the lower surface of the three slide bars 2. 1, the boss 52 will be restricted to the overlapping part of the top projection of the slide groove 51 and the slideway 11. When the turntable 5 rotates counterclockwise, the inner sides of the three slide grooves 51 will respectively push the corresponding bosses 52 outwards with the rotation, and the overlapping part of the top projection of the slide groove 51 and the slideway 11 will also move outwards together, so that the three slide bars 2 can extend outwards equidistantly along their respective slideways 11 at the same time, and then when the turntable 5 rotates clockwise, the three slide bars 2 can retract inwards equidistantly along their respective slideways 11 at the same time. The hollowing out of the bottom of the three slideways 11 is to avoid the boss 52.

[0021] In this embodiment, the structure of the turntable driving mechanism is as follows: a first pulley 6 is provided on the lower surface of the turntable 5, a second pulley 61 which can be driven to rotate by a handle 62 is provided on the chassis 1, and a belt 63 is wound around the second pulley 61 and the first pulley 6, so that the second pulley 61 can drive the first pulley 6 to rotate with the turntable 5 after rotating. In actual production, the turntable 5 can also be manually turned by a lever fixed thereto and extending out of the chassis 1.

[0022] The structure of the fixing mechanism is as follows: a notch is provided on the side wall of the port of the inner section of the two adjacent sections, and a clamp 4 is mounted on the outer side of the notch. After tightening the clamp 4, the port of the inner section can be clamped tightly against the outer section, so that the two adjacent sections are fixedly connected together. In this embodiment, the clamp 4 is tightened with a hexagon socket bolt. For ease of use, a wrench 41 for turning the hexagon socket bolt is also inserted on the chassis 1.

[0023] The structure of the chassis 1 includes: an inverted disc box 7, three slides 11 are arranged on the top surface of the disc box 7, the turntable 5 is located in the disc box 7, and a detachable cover plate 71 for closing the disc box 7 is covered on the lower disc opening of the disc box 7.

[0024] The inner end of the telescopic rod 3 is hinged to the outer end of the slide bar 2. A mounting plate 8 is detachably mounted on the outer end of the slide bar 2, and the inner end of the telescopic rod 3 is hinged to the mounting plate 8. This arrangement makes it convenient to remove the telescopic rod 3 when not in use, and can also reduce the floor space by turning the telescopic rod 3 upward.

[0025] A limit groove running inward and outward is provided on both side walls of the slide 11, and a limit strip running inward and outward is provided on both sides of the slide bar 2. When the limit strips on both sides of the slide bar 2 are respectively inserted into the limit grooves on the corresponding sides, the slide bar 2 can be prevented from detaching from the slide 11 in the vertical direction.

[0026] Before measurement, the three telescopic rods 3 on the ring inner diameter measuring device are not extended, and each adjacent two sections on the telescopic rod 3 are fixedly connected together by a fixing mechanism, and the three slide bars 2 do not slide outward but are located in the initial position. At this time, the scale reading on the first section 31 aligned with the outer end surface of the second section 32 is equal to the distance from the outermost end of the telescopic rod 3 to the center of the chassis 1.

[0027] During measurement, the ring inner diameter measuring device is placed in the ring 9, and then the fixing mechanism is loosened to extend the three telescopic rods 3 outwards respectively, so that the outer ends of the three telescopic rods 3 are close to the inner ring side wall of the ring 9, but a small distance is left, and the three telescopic rods 3 are extended at equal distances. When extending the telescopic rods 3, the following requirements are followed: they can only be extended from the outside to the inside, section by section, that is, only when a section is extended to the maximum scale reading on the section and is aligned with the outer end face of the inner adjacent section and fixed together with the inner adjacent section by the fixing mechanism, can the next section be extended, and after the last section is extended, it needs to be fixed to its inner adjacent section by the fixing mechanism; Then drive the turntable 5 to rotate so that the three slide bars 2 slide outward at equal distances at the same time until the outer ends of the three telescopic rods 3 are in contact with the inner ring side wall of the ring 9. During this process, the center of the chassis 1 will automatically move to the center of the ring. Then add the scale reading read from the last extended section of the telescopic rod 3 + the distance the slide bar 2 slides outward read on the scale 12 by the pointer 13, and then multiply the added value by 2 to obtain the measured value of the inner diameter of the ring.

Claims

1. A ring inner diameter measuring device, comprising: The chassis is characterized in that: three horizontally arranged slideways and a scale are arranged on the chassis, the three slideways are arranged at an angle of 120 degrees to each other, and the axes of the three slideways pass through the center of the chassis, each slideway is provided with a slide bar that can slide along the slide bar, and the distances between the outer ends of the three slide bars and the center of the chassis are equal. The chassis is also provided with a slide bar driving device that can drive the three slide bars to extend outwards equidistantly at the same time or to retract inwards equidistantly at the same time, the scale is located on the side of a slide bar, and a pointer pointing to the scale is arranged on the slide bar, and the sliding distance of the slide bar can be read on the scale by the pointer, and a horizontally arranged telescopic rod is arranged on the outer end of each slide bar, and the axes of the three telescopic rods pass through the center of the chassis. The rod has at least two sections, the outermost section on the telescopic rod is the first section, the inner end of the telescopic rod is connected to the outer end of the slider, and the telescopic rod is provided with scales distributed on the sections, and the scale readings gradually increase from the outside to the inside. The outer end surfaces of the remaining sections except the first section can be used to align with the scale readings on the outer adjacent section to read the readings. When the slider does not slide outward and the telescopic rod does not extend except the first section, the scale reading on the first section aligned with the outer end surface of the second section is equal to the distance from the outermost end of the telescopic rod to the center of the chassis. The structure of the telescopic rod also includes a fixing mechanism arranged between each adjacent section that can fix the adjacent sections together; the structure of the slider driving device is: a turntable and a turntable driving mechanism that can drive the turntable to rotate are arranged on the chassis. The three slides are arranged evenly around the center of the chassis, and the three slides are respectively arranged one by one under the three slides. The bottoms of the three slides are hollowed out, and a boss is arranged on the lower surface of the three slides, which passes through the slide and is inserted into the corresponding slide. The boss will be restricted to the overlapping part of the top projection of the slide and the slide. When the turntable rotates forward, the inner sides of the three slides will push the corresponding boss outwards respectively with the rotation, and the overlapping part of the top projection of the slide and the slide will also move outwards together, so that the three slides can be extended outwards equidistantly along their respective slides at the same time, and then when the turntable rotates in the opposite direction, the three slides can be retracted inwards equidistantly along their respective slides at the same time; at the bottom of the turntable A first pulley is arranged on the surface, and a second pulley which can be driven to rotate by a rotating handle is arranged on the chassis. A belt is wound around the second pulley and the first pulley, so that the second pulley can drive the first pulley to rotate with the turntable after rotating; the structure of the fixing mechanism is as follows: a notch is opened on the side wall of the port of the inner section of the two adjacent sections, and a clamp is mounted on the outer side of the notch. After tightening the clamp, the port of the inner section can clamp the outer section, so that the two adjacent sections are fixedly connected together; an inward-outward limiting groove is arranged on both side walls of the slideway, and an inward-outward limiting strip is arranged on both sides of the slide bar. After the limiting strips on both sides of the slide bar are respectively inserted into the limiting grooves on the corresponding sides, the slide bar can be prevented from separating from the slideway in the vertical direction.

2. A ring inner diameter measuring device according to claim 1, characterized in that: The three telescopic rods have the same structure and all have four sections.

3. A ring inner diameter measuring device according to claim 1, characterized in that: The structure of the chassis includes: an inverted disc box, three slideways are arranged on the top surface of the disc box, the turntable is located in the disc box, and a detachable cover plate for closing the disc box is covered on the lower disc opening of the disc box.

4. A ring inner diameter measuring device according to claim 1, characterized in that: The inner end of the telescopic rod and the outer end of the slide bar are hinged.

5. A ring inner diameter measuring device according to claim 4, characterized in that: A mounting plate is detachably mounted on the outer end of the slide bar, and the inner end of the telescopic rod is hinged to the mounting plate.

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