A device for detecting non-go thread pitch diameter

Abstract

This application provides a device for detecting the pitch diameter of non-standard external threads, including a base and a slide table that are slidably arranged relative to each other. A first lifting platform is fixedly arranged on the upper surface of the base, and a second lifting platform is arranged on the upper surface of the slide table. A double-needle measuring platform is arranged on the side of the first lifting platform near the second lifting platform, and a micrometer is arranged on the side of the second lifting platform near the first lifting platform. Based on the pitch diameter of the non-standard external thread to be measured, this application controls the base and slide table to move closer or further apart, and realizes a three-needle detection method through the first and second lifting platforms, the double-needle measuring platform, and the micrometer. This method can quickly and accurately obtain the pitch diameter of the non-standard external thread, improving the detection efficiency. Furthermore, this application, through the slidably arranged base and slide table, can detect threads with various pitch diameters. The first and second lifting platforms allow the measuring probe to quickly contact the measuring area, achieving efficient detection of the pitch diameter of non-standard external threads.

Description

Technical Field

[0001] This utility model belongs to the field of measurement technology, specifically relating to a device for detecting the mean diameter of non-standard external threads. Background Technology

[0002] The pitch diameter is an important indicator for judging whether a precision thread is qualified. Currently, thread pitch diameter is usually measured using thread micrometers, ring gauges, etc. For special threads, such as sawtooth threads and non-standard threads, projectors and three-needle methods are usually used. However, these measuring tools have disadvantages such as low inspection efficiency, large device size, and inconvenience of use, and are not suitable for the inspection needs of mass production.

[0003] In existing related technologies, Chinese patent CN217005629U discloses a device for detecting the pitch diameter of external threads, which mainly consists of a digital display gauge, a support, and a probe. It is convenient and efficient to use, but the adjustable range of the slide and support is small, and it cannot meet the testing needs of parts of all sizes. Chinese patent CN214537706U discloses a sawtooth-type device for detecting the pitch diameter of external threads, which provides a device mainly composed of an external thread micrometer and a gear micrometer probe. It is simple and convenient to operate, but the pitch diameter value is calculated from the dimensions of each line segment, which is an indirect measurement and cannot be directly measured. Therefore, this application anticipates a device that can quickly detect the pitch diameter of external threads. Utility Model Content

[0004] In order to overcome the shortcomings of low efficiency and poor accuracy in the detection of the pitch diameter of external threads in the existing technology, this utility model provides a device for detecting the pitch diameter of non-standard external threads.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A device for detecting the pitch diameter of non-standard external threads includes a base and a slide that are slidably arranged relative to each other. A first lifting platform is fixedly arranged on the upper surface of the base, and a second lifting platform is arranged on the upper surface of the slide. A double-needle measuring platform is arranged on the side of the first lifting platform near the second lifting platform, and a micrometer is arranged on the side of the second lifting platform near the first lifting platform.

[0007] Furthermore, the base and the slide are C-shaped structures that are opposite to each other and staggered. The base includes a C-shaped structure composed of a first top plate, a first side plate and a first bottom plate. The slide includes a C-shaped structure composed of a second top plate, a second side plate and a second bottom plate. The second top plate is slidably attached to the first top plate and the second bottom plate is slidably inserted into the first bottom plate.

[0008] Furthermore, the first base plate has a sliding groove on the side near the slide table and in the extension direction, and the bottom of the slide table is slidably inserted into the sliding groove;

[0009] A guide rail is provided along the extension direction of the sliding groove, and a sliding member adapted to the structure of the guide rail is provided at the bottom of the second base plate. The guide rail and the sliding member are slidably connected.

[0010] Furthermore, the dual-needle testing platform includes a fixed plate and a second probe pressure plate. The fixed plate is detachably mounted on the upper surface of the first lifting platform by bolts, and the second probe pressure plate is detachably mounted on the side of the fixed plate near the second lifting platform by bolts.

[0011] The second probe pressure plate has two second probe grooves on its side wall away from the second lifting platform. The two second probe grooves are arranged in parallel along the vertical direction of the second probe pressure plate, and the distance between the two second probe grooves on the same second probe pressure plate is equal to the distance between two adjacent thread grooves of the non-standard external thread to be tested.

[0012] Furthermore, the second probe pressure plate is provided with two relatively parallel second probes.

[0013] Furthermore, the micrometer is nested within a scale bracket, which is detachably bolted to the upper surface of the second lifting platform. The scale bracket includes a fixed thin plate and a first probe pressure plate detachably bolted to the bottom surface of the fixed thin plate. The first probe pressure plate has a first probe groove on its side wall near the fixed thin plate, and the horizontal projections of the two first probe grooves on the two fixed thin plates are located in the same straight line, for jointly engaging the same first probe.

[0014] Furthermore, the dual-needle measuring platform includes two second measuring needles, and the micrometer includes a first measuring needle. The second measuring needle and the first measuring needle are arranged in parallel, and the horizontal projection position of the first measuring needle is located between the two second measuring needles.

[0015] Furthermore, the minimum distance between the first lifting platform and the second lifting platform is less than the minimum non-standard external thread pitch diameter to be measured, and the maximum distance between the first lifting platform and the second lifting platform is greater than the maximum non-standard external thread pitch diameter to be measured.

[0016] Furthermore, the maximum lifting height of the first lifting platform is greater than or equal to the maximum lifting height of the second lifting platform.

[0017] Furthermore, a support slider is provided on the side of the bottom surface of the slide table away from the base.

[0018] The beneficial effects of this utility model are:

[0019] This application provides a device for detecting the pitch diameter of non-standard external threads, including a base and a slide table that are slidably arranged relative to each other. A first lifting platform is fixedly arranged on the upper surface of the base, and a second lifting platform is arranged on the upper surface of the slide table. A double-needle measuring platform is arranged on the side of the first lifting platform near the second lifting platform, and a micrometer is arranged on the side of the second lifting platform near the first lifting platform. Based on the pitch diameter of the non-standard external thread to be measured, this application controls the base and slide table to move closer or further apart, and realizes a three-needle detection method based on the first and second lifting platforms, the double-needle measuring platform, and the micrometer. This method can quickly and accurately obtain the pitch diameter of the non-standard external thread, greatly improving the detection efficiency of the non-standard external thread pitch diameter. At the same time, this application can detect threads with various pitch diameters by means of the slidably arranged base and slide table. The first and second lifting platforms can quickly bring the measuring probe into contact with the measurement area, achieving efficient detection of the pitch diameter of non-standard external threads. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of this utility model is shown;

[0021] Figure 2 A schematic diagram of the structure of the dual-needle measuring stage of this utility model is shown;

[0022] Figure 3 A schematic diagram of the scale support of this utility model is shown;

[0023] Figure 4 A schematic diagram of the sliding groove and sliding component of this utility model is shown;

[0024] Figure 5 A schematic diagram of the structure of the second probe pressure plate of this utility model is shown.

[0025] In the diagram, 1-base; 101-sliding groove; 2-slide table; 3-first lifting platform; 4-second lifting platform; 5-scale bracket; 6-micrometer scale; 7-double needle measuring platform; 8-second stylus pressure plate; 10-second stylus; 11-first stylus pressure plate; 12-fixing plate; 13-first stylus; 14-sliding component; 15-guide rail; 102-first top plate; 103-first side plate; 104-first bottom plate; 201-second top plate; 202-second side plate; 203-second bottom plate; 701-fixing plate; 801-second stylus groove; 1101-first stylus groove; 9-support slider. Detailed Implementation

[0026] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0027] This disclosure provides an apparatus for detecting the pitch diameter of non-standard external threads, which can greatly improve the detection efficiency of non-standard external thread pitch diameters and can also detect various non-standard external thread pitch diameters.

[0028] Figure 1 An embodiment of this disclosure illustrates an apparatus for detecting the pitch diameter of non-standard external threads, such as... Figure 1 As shown, it includes a base 1 and a slide 2 that are slidably arranged relative to each other. A first lifting platform 3 is fixedly arranged on the upper surface of the base 1, and a second lifting platform 4 is arranged on the upper surface of the slide 2. A double-needle measuring platform 7 is arranged on the side of the first lifting platform 3 near the second lifting platform 4, and a micrometer 6 is arranged on the side of the second lifting platform 4 near the first lifting platform 3.

[0029] The base 1 and the slide 2 are C-shaped structures arranged opposite to each other and staggered. The base 1 includes a C-shaped structure composed of a first top plate 102, a first side plate 103, and a first bottom plate 104. The slide 2 includes a C-shaped structure composed of a second top plate 201, a second side plate 202, and a second bottom plate 203. The second top plate 201 is slidably attached to the first top plate 102, and the second bottom plate 203 is slidably inserted into the first bottom plate 104. On the one hand, the opposite and staggered arrangement of the base 1 and the slide 2 can prevent structural interference when the base 1 and the slide 2 are close to or far apart. On the other hand, due to their sliding arrangement, the slide 2 can slide within a preset motion trajectory.

[0030] A support slider 9 is provided on the side of the bottom surface of the slide table 2 away from the base 1 to provide structural support for the slide table 2 and improve the stability of the slide table 2 during long-term sliding and testing processes.

[0031] Figure 4 A schematic diagram of the sliding groove and sliding member according to an embodiment of the present disclosure is shown, as follows: Figure 4 As shown, the first base plate 104 has a sliding groove 101 on the side near the slide table 2 and in the extension direction, and the second base plate 203 is slidably inserted into the sliding groove 101.

[0032] The sliding groove 101 is provided with a guide rail 15 along its extension direction, and the second base plate 203 is provided with a sliding member 14 that is adapted to and slidably connected to the guide rail 15. Specifically, the side wall of the guide rail 15 is provided with a concave sliding groove, and the sliding member 14 is provided with a sliding block adapted to the concave sliding groove. The concave sliding groove and the sliding block are slidably engaged to prevent the sliding member 14 and the guide rail 15 from non-moving displacement, thereby ensuring measurement accuracy.

[0033] Figure 2A schematic diagram of the structure of the dual-needle stage according to an embodiment of the present disclosure is shown, as follows: Figure 2 As shown, the dual-needle testing platform 7 includes a fixing plate 701 and a second probe pressure plate 8. The fixing plate 701 is detachably mounted on the upper surface of the first lifting platform 3 by bolts. The second probe pressure plate 8 is detachably mounted on the side of the fixing plate 701 near the second lifting platform 4 by bolts. The fixing plate 701 has an L-shaped structure, with one side detachably attached to the upper surface of the first lifting platform 3 by bolts, and the other side vertically mounted for detachably connecting the second probe pressure plate 8 by bolts. Figure 5 A schematic diagram of the structure of the second probe pressure plate 8 according to an embodiment of this disclosure is shown, as follows: Figure 5 As shown, there are two second probe pressure plates 8, respectively disposed on both sides of the fixed plate 701. Two second probe grooves 801 are provided on the side wall of the second probe pressure plate 8 away from the second lifting platform 4. The second probe grooves 801 are used to engage the second probes 10. The two second probe grooves 801 are arranged parallel to each other along the vertical direction of the second probe pressure plate 8; and the distance between the second probe grooves 801 located on the same second probe pressure plate 8 is equal to the distance between two adjacent grooves of the non-standard external thread to be tested. It should also be noted that the two second probe grooves 801 of the same height, located on the two second probe pressure plates 8 respectively, have the same groove structure and are used to place second probes 10 of the same outer diameter specification. The second probe pressure plate 8 is provided with two relatively parallel second probes 10.

[0034] Figure 3 A schematic diagram of the structure of the scale bracket according to an embodiment of this disclosure is shown, as follows: Figure 3 As shown, the micrometer 6 is nested within the micrometer bracket 5. The micrometer bracket 5 is detachably bolted to the upper surface of the second lifting platform 4. The micrometer bracket 5 includes a fixed thin plate 12 and two first probe pressure plates 11 detachably bolted to the bottom surface of the fixed thin plate 12. The two first probe pressure plates 11 are spaced apart on both sides of the fixed thin plate 12. Each of the two first probe pressure plates 11 near the fixed thin plate 12 has a first probe groove 1101. The horizontal projections of the two first probe grooves 1101 on the two fixed thin plates 12 are located in the same straight line, used to jointly engage the same first probe 13. The outer diameter of the first probe 13 is adapted to the structure of the non-standard external thread groove to be measured.

[0035] The dual-needle measuring platform 7 includes two second measuring needles 10, and the micrometer 6 includes a first measuring needle 13. The second measuring needles 10 and the first measuring needle 13 are arranged in parallel, and the horizontal projection position of the first measuring needle 13 is located between the two second measuring needles 10.

[0036] Furthermore, the maximum lifting height of the first lifting platform 3 is greater than or equal to the maximum lifting height of the second lifting platform 4, so as to ensure that the relative positions of the first probe 13 and the second probe 10 can realize the three-needle detection method.

[0037] The minimum distance between the first lifting platform 3 and the second lifting platform 4 is less than the minimum diameter of the non-standard external thread to be measured, and the maximum distance between the first lifting platform 3 and the second lifting platform 4 is greater than the maximum diameter of the non-standard external thread to be measured. Understandably, the relative sliding displacement between the base 1 and the slide 2 should also satisfy the following:

[0038] The minimum non-standard external thread pitch diameter to be measured > the relative sliding displacement of base 1 and slide 2 > the maximum non-standard external thread pitch diameter to be measured.

[0039] This embodiment discloses a process for detecting the pitch diameter of non-standard external threads. Based on the pitch diameter of the non-standard external thread to be measured, the base 1 and the slide 2 are controlled to slide to a preset position. A standard part is used to calibrate the micrometer 6. Specifically, through the first lifting platform 3 and the second lifting platform 4, the two second probes 10 of the double-needle measuring platform 7 are respectively contacted in the adjacent thread grooves of the standard part. Then, the first probe 13 of the micrometer 6 is contacted in the thread groove facing away from the adjacent thread groove. At this time, the reading of the micrometer 6 is used as the calibration zero point.

[0040] Next, the first probe 13 and the two second probes 10 are sequentially disengaged from the threads of the standard part, and the standard part is replaced with the part to be tested. Through the first lifting platform 3 and the second lifting platform 4, the two second probes 10 of the double-needle measuring platform 7 are respectively placed into the adjacent thread grooves of the non-standard external thread pitch diameter of the part to be tested. The first probe 13 of the dial gauge 6 is placed into the thread groove facing away from the adjacent thread groove. At this time, the reading of the dial gauge 6 is the detection result of the non-standard external thread pitch diameter to be tested. If the reading is 0, it is considered that the non-standard external thread pitch diameter to be tested meets the requirements. Otherwise, according to the error threshold, it is determined whether the non-standard external thread pitch diameter to be tested meets the requirements. If the reading is greater than the error threshold, it does not meet the processing requirements. If the reading is less than the error threshold, it meets the processing requirements.

[0041] This embodiment can quickly and accurately obtain the pitch diameter of the non-standard external thread by means of a three-needle detection method, which greatly improves the detection efficiency of the non-standard external thread pitch diameter. At the same time, this application can detect threads with different pitch diameters by means of a sliding base 1 and a slide 2. The first lifting platform 3 and the second lifting platform 4 can quickly bring the probe to the measurement area, so as to achieve efficient detection of the non-standard external thread pitch diameter.

Claims

1. A device for detecting the pitch diameter of non-standard external threads, characterized in that, It includes a base (1) and a slide (2) that are slidably arranged. A first lifting platform (3) is fixedly arranged on the upper surface of the base (1), and a second lifting platform (4) is arranged on the upper surface of the slide (2). A double needle measuring platform (7) is arranged on the side of the first lifting platform (3) near the second lifting platform (4), and a micrometer (6) is arranged on the side of the second lifting platform (4) near the first lifting platform (3).

2. The device for detecting the pitch diameter of non-standard external threads according to claim 1, characterized in that, The base (1) and the slide (2) are C-shaped structures arranged opposite to each other and staggered. The base (1) includes a C-shaped structure composed of a first top plate (102), a first side plate (103) and a first bottom plate (104). The slide (2) includes a C-shaped structure composed of a second top plate (201), a second side plate (202) and a second bottom plate (203). The second top plate (201) slides against the first top plate (102), and the second bottom plate (203) slides into the first bottom plate (104).

3. The device for detecting the pitch diameter of non-standard external threads according to claim 2, characterized in that, The first base plate (104) has a sliding groove (101) on the side near the slide table (2) and in the extension direction, and the bottom of the slide table (2) is slidably inserted into the sliding groove (101); The sliding groove (101) is provided with a guide rail (15) in the extension direction, and the bottom of the second base plate (203) is provided with a sliding member (14) adapted to the structure of the guide rail (15), and the guide rail (15) and the sliding member (14) are slidably connected.

4. The device for detecting the pitch diameter of non-standard external threads according to claim 1, characterized in that, The dual-needle testing platform (7) includes a fixed plate (701) and a second probe pressure plate (8). The fixed plate (701) is detachably mounted on the upper surface of the first lifting platform (3) by bolts, and the second probe pressure plate (8) is detachably mounted on the side of the fixed plate (701) near the second lifting platform (4) by bolts. The second probe pressure plate (8) has two second probe grooves (801) on its side wall away from the second lifting platform (4). The two second probe grooves (801) are arranged in parallel along the vertical direction of the second probe pressure plate (8), and the distance between the two second probe grooves (801) on the same second probe pressure plate (8) is equal to the distance between two adjacent thread grooves of the non-standard external thread to be tested.

5. The device for detecting the pitch diameter of non-standard external threads according to claim 4, characterized in that, The second probe pressure plate (8) is provided with two relatively parallel second probes (10).

6. The device for detecting the pitch diameter of non-standard external threads according to claim 1, characterized in that, The micrometer scale (6) is nested inside the scale bracket (5). The scale bracket (5) is detachably bolted to the upper surface of the second lifting platform (4). The scale bracket (5) includes a fixed thin plate (12) and a first probe pressure plate (11) detachably bolted to the bottom surface of the fixed thin plate (12). The first probe pressure plate (11) has a first probe groove (1101) on its side wall near the fixed thin plate (12). The horizontal projections of the two first probe grooves (1101) on the two fixed thin plates (12) are located in the same straight line and are used to jointly engage the same first probe (13).

7. The device for detecting the pitch diameter of non-standard external threads according to claim 1, characterized in that, The dual-needle measuring platform (7) includes two second measuring needles (10), and the micrometer (6) includes a first measuring needle (13). The second measuring needles (10) and the first measuring needle (13) are arranged in parallel, and the first measuring needle (13) is located between the two second measuring needles (10) in the horizontal projection position.

8. The device for detecting the pitch diameter of non-standard external threads according to claim 1, characterized in that, The minimum distance between the first lifting platform (3) and the second lifting platform (4) is less than the minimum non-standard external thread pitch diameter to be measured, and the maximum distance between the first lifting platform (3) and the second lifting platform (4) is greater than the maximum non-standard external thread pitch diameter to be measured.

9. The device for detecting the pitch diameter of non-standard external threads according to claim 1, characterized in that, The maximum lifting height of the first lifting platform (3) is greater than or equal to the maximum lifting height of the second lifting platform (4).

10. The device for detecting the pitch diameter of non-standard external threads according to claim 1, characterized in that, A support slider (9) is provided on the side of the bottom surface of the slide (2) away from the base (1).

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