Precision part pitch measuring device

Abstract

The utility model relates to the technical field of mechanical measuring equipment, and particularly discloses a precision part pitch measuring device which is high in detection efficiency and detection result reliability and low in use and maintenance cost, the precision part pitch measuring device comprises a fixed support, a dial indicator, a switching rod and a probe, the dial indicator is installed on the fixed support, and the switching rod is installed on the probe. The dial indicator is provided with a measuring rod extending back to the center of the dial indicator. The adapter rod is fixed at the tail end of the measuring rod, the adapter rod extends along the length direction of the measuring rod, and at least one mounting position is arranged on the adapter rod; the axial direction of the probe is perpendicular to the axial direction of the adapter rod, the probe comprises a connecting part detachably mounted at the mounting position and a conical detection part fixedly connected with the connecting part and used for being inserted into a to-be-detected hole position, and the annular side surface of the conical detection part is a conical surface.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical measuring equipment, in particular to a precision parts hole distance measuring device. Background Art

[0002] After the hole processing of precision parts, it is necessary to measure the hole margin or hole center distance of the hole to detect the hole processing accuracy and meet the processing requirements of precision parts. At present, the industry mainly uses non-contact optical detection instruments such as optical projectors to detect the hole margin or hole center distance, or uses cone-head vernier calipers for detection. In the process of using optical instruments for detection, burrs, oil stains on parts, and the operating level of the detection personnel have a direct impact on the measurement results. The detection operation is subject to many interference factors, which makes the reliability of the detection results insufficient. In addition, the overall measurement of optical instrument detection takes a long time, the detection efficiency is low, and the instrument use and maintenance costs are high. When using a vernier caliper for measurement, since the accuracy of a conventional vernier caliper is 0.01mm, it is difficult to meet the high-precision measurement requirements, and the detection accuracy is low. Utility Model Content

[0003] Based on this, it is necessary to provide a precision parts hole distance measuring device with high detection efficiency and reliability of detection results and low use and maintenance costs to address the above shortcomings.

[0004] A precision parts hole distance measuring device, comprising:

[0005] Fixed bracket;

[0006] A dial gauge, the dial gauge is mounted on the fixed bracket, and the dial gauge is provided with a measuring rod extending in a direction away from the center of the dial gauge;

[0007] A transfer rod, wherein the transfer rod is fixed to the end of the measuring rod and extends along the length direction of the measuring rod, and the transfer rod is provided with at least one installation position; and

[0008] The measuring needle has an axial direction perpendicular to the axial direction of the adapter rod, and the measuring needle includes a connecting portion detachably mounted at the mounting position, and a conical detection portion fixedly connected to the connecting portion and used for inserting into the hole to be measured, wherein the annular side surface of the conical detection portion is a conical surface.

[0009] In one embodiment, a threaded mounting groove is formed at the bottom of the measuring rod, and a threaded column is formed at the top of the adapter rod, which is inserted into the threaded mounting groove and threadedly connected to the inner wall of the threaded mounting groove.

[0010] In one embodiment, a threaded through hole is opened on the adapter rod below the threaded column to form the installation position, and the connecting portion of the measuring needle has an external thread, which is inserted into the threaded through hole and threadedly connected to the inner surface of the threaded through hole.

[0011] In one embodiment, a threaded groove is provided on one side of the adapter rod adjacent to the measuring needle below the threaded column to form the mounting position, and the connecting portion of the measuring needle has an external thread, which is inserted into the threaded groove and threadedly connected to the inner surface of the threaded groove.

[0012] In one of the embodiments, a plurality of mounting positions for adapting to measuring needles of different sizes are arranged at intervals from top to bottom on the transfer rod.

[0013] In one embodiment, a gripping notch is provided on a side of the transfer rod facing away from the measuring needle, the vertical section of the gripping notch is a right-angled trapezoidal structure, and the inner side surface of the gripping notch adjacent to the bottom end of the transfer rod is an inclined surface.

[0014] In one embodiment, the measuring needle also includes a conical transition portion located between the connecting portion and the conical detection portion and fixedly connected to the connecting portion, and an annular portion connecting the conical transition portion and the conical detection portion, and the diameter of the annular portion is the same as the maximum diameter on the conical detection portion.

[0015] In one embodiment, the diameter of the annular portion is between 2.5-3.5 mm, the length of the conical detection portion is between 3-10 mm, and the cone angle of the conical detection portion is between 30°-60°.

[0016] In one embodiment, the fixed bracket includes a base, a column fixed on the base, a cantilever slidably connected to the column and capable of being raised and lowered, and a locking member for limiting the installation height of the cantilever on the column, and the micrometer is installed at the end of the cantilever.

[0017] In one of the embodiments, two arc-shaped claws are arranged opposite to each other at one end of the cantilever adjacent to the column, and a connection channel for passing the column is formed between the two arc-shaped claws. The locking member passes through the ends of the two arc-shaped claws in sequence and is threadedly connected to the nut so that the arc-shaped claws press the column.

[0018] The precision part hole distance measuring device of the utility model is implemented by installing an adapter rod on the micrometer and fixing a measuring needle on the adapter rod. The hole distance of the part can be calculated by reading the reading of the micrometer after the measuring needle is inserted into the hole to be measured and combining the size of the measuring needle. The operation is simple and can realize rapid detection of the hole distance of the precision part, thereby improving the hole distance detection efficiency. The structure is simple and involves a small number of equipment and parts, thereby reducing the cost of instrument use and maintenance. The measuring needle and the adapter rod are used in conjunction with the micrometer to perform hole position measurement, and the measurement accuracy can reach 0.001mm, which significantly improves the reliability of the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a structural schematic diagram of a precision parts hole distance measuring device in one embodiment of the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of a partially enlarged structure of part A in the illustrated embodiment;

[0021] Figure 3 It is a structural schematic diagram of the connection between the transfer rod and the measuring needle in one embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram of the cross-sectional structure when using a measuring needle for measurement in one embodiment of the utility model;

[0023] Figure 5 This is a schematic structural diagram of a transfer rod in one embodiment of the utility model;

[0024] Figure 6 Schematic diagram of the structure of different types of measuring needles in one embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0026] The utility model discloses a precision parts hole distance measuring device 10, which is mainly used for measuring the hole edge distance and hole center distance of precision parts holes, so as to solve the problem that the hole edge distance and hole center distance of precision parts production site cannot be quickly and accurately detected. It replaces the traditional optical device and vernier caliper measurement method, and has the advantages of high detection efficiency, high detection accuracy and reliability of detection results, simple structure, easy operation, and low use and maintenance costs. Figure 1The measuring device of the present embodiment comprises a fixed bracket 100, a micrometer 200, an adapter rod 300 and a measuring needle 400. The fixed bracket 100 is used to provide a mounting position for the micrometer 200 and to raise the height of the micrometer 200 so that the micrometer 200 can measure the hole position on the side of the part from above the part to be measured; the micrometer 200 is an instrument that converts linear displacement or linear motion into rotational motion of a pointer through gears or levers, and realizes length measurement by reading the reading on the dial; the adapter rod 300 and the measuring needle 400 are assembled and installed at the measuring end of the micrometer 200, wherein the measuring needle 400 can be inserted into the hole position to be measured, and is used as the measuring part of the measuring device of the present embodiment, so that the hole edge distance and hole center distance of the hole position of the precision part can be measured by the micrometer 200.

[0027] For details, please combine Figure 1-4 , the micrometer 200 is mounted on the fixed bracket 100, and the micrometer 200 is provided with a measuring rod 210 extending in the direction opposite to the center of the micrometer 200. Further, the micrometer 200 also includes a case, a dial fixed in the case, a transmission system housed in the case and fixed on the back of the dial, a pointer connected to the transmission system and housed in the case and located on one side of the main surface of the case, the graduation value of the dial is 0.001mm, the measuring rod 210 is movably mounted on the outer ring side of the case and can be raised and lowered relative to the case, and the measuring rod 210 is used to move under the action of external force and drive the pointer to rotate via the transmission system. Among them, the transmission system includes a rack fixedly connected to the measuring rod 210, a first shaft gear meshed with the rack, a gear that rotates synchronously with the first shaft gear, and a second shaft gear meshed with the gear, and the pointer is fixed on the second shaft gear and rotates driven by the second shaft gear. When the measuring rod 210 moves 1 mm along the length direction of the measuring rod 210, this movement is amplified by the rack, the first shaft gear, the gear and the second shaft gear and then transmitted to the pointer installed on the second shaft gear, so that the pointer rotates one circle. In this way, the movement distance of the measuring rod 210 can be read with an accuracy of 0.001 mm through the scale indicated by the pointer on the dial. The micrometer 200 of this embodiment is a common micrometer 200 structure on the market, and its working principle is not repeated here.

[0028] The transfer rod 300 is fixed to the end of the measuring rod 210, and the transfer rod 300 is extended along the length direction of the measuring rod 210, and at least one mounting position 310 is provided on the transfer rod 300. The axial direction of the measuring needle 400 is perpendicular to the axial direction of the transfer rod 300. The measuring needle 400 includes a connecting portion 410 that is detachably mounted at the mounting position 310, and a conical detection portion 420 that is fixedly connected to the connecting portion 410 and is used to be inserted into the hole to be measured, and the ring side surface of the conical detection portion 420 is a conical surface. In this embodiment, by limiting the axial direction of the measuring needle 400 to be perpendicular to the axial direction of the transfer rod 300, it is ensured that the moving distance of the measuring rod 210 can accurately reflect the position information of the hole to be measured. When the adapter rod 300 is installed at the end of the measuring rod 210, during the hole measurement process, when the micrometer height is determined, after the measuring needle 400 is inserted into the corresponding hole on the part to be measured, the measuring needle 400 and the adapter rod 300 will drive the measuring rod 210 to move up or down synchronously according to the size and position of the hole, thereby causing the pointer to rotate, and the hole edge distance and hole center distance of the hole are calculated through the pointer readings.

[0029] The precision part hole distance measuring device 10 is provided with a transfer rod 300 installed on a micrometer 200, and a probe 400 is fixed on the transfer rod 300. By reading the reading of the micrometer 200 after the probe 400 is inserted into the hole to be measured, and combining the size of the probe 400, the hole distance of the part can be calculated. The operation is simple, and the rapid detection of the hole distance of the precision part can be realized, thereby improving the hole distance detection efficiency. The structure is simple, and the number of equipment and parts involved is small, thereby reducing the instrument use and maintenance costs. The probe 400 and the transfer rod 300 are used together with the micrometer 200 to perform hole position measurement, and the measurement accuracy can reach 0.001mm, thereby significantly improving the reliability of the detection result. Compared with the optical instrument measurement method, the device has the advantages of small size, good portability, and no need for a dedicated measurement environment. The probe 400 and the transfer rod 300 are simple in structure, easy to process, and have excellent durability and interchangeability. They can adapt to the oily environment of the manufacturing site, are easy to install, and do not rely on the professionalism of the personnel, thereby reducing the difficulty of operation.

[0030] See also Figure 1The fixed bracket 100 includes a base 110, a column 120 fixed on the base 110, a cantilever 130 slidably sleeved on the column 120 and capable of being raised and lowered, and a locking member 140 for limiting the installation height of the cantilever 130 on the column 120. The micrometer 200 is installed at the end of the cantilever 130. Further, two arc-shaped claws 150 are oppositely arranged at one end of the cantilever 130 adjacent to the column 120, and a connecting channel for penetrating the column 120 is formed between the two arc-shaped claws 150. The locking member 140 sequentially penetrates the ends of the two arc-shaped claws 150 and is threadedly connected with a nut 160, so that the arc-shaped claws 150 press the column 120. In this embodiment, the locking member 140 is a stud or a pin with external threads on the surface. During the position adjustment process of the micrometer 200, the locking member 140 can be loosened to reduce the squeezing force of the arc-shaped claw 150 on the outer surface of the column 120 until the arc-shaped claw 150 can slide relative to the column 120; then the cantilever 130 is pulled to adjust the position of the cantilever 130 and the micrometer 200 to a specified height, and the locking member 140 is tightened again to make the two arc-shaped claws 150 press the outer surface of the column 120, thus completing the height adjustment of the micrometer 200. It should be noted that in this embodiment, the micrometer 200 can be fixed to the end of the cantilever 130 by bolts, or a mounting ring can be set at the end of the cantilever 130, and the micrometer 200 can be nested in the mounting ring to achieve fixed installation of the micrometer 200 on the cantilever 130.

[0031] The bottom of the measuring rod 210 is provided with a threaded mounting groove, and the top of the adapter rod 300 is provided with a threaded column 320 inserted into the threaded mounting groove and threadedly connected to the inner wall of the threaded mounting groove, that is, the adapter rod 300 is fixed to the measuring rod 210 by threaded connection, so as to drive the measuring rod 210 to rise and fall when the measuring needle 400 is inserted into the hole to be measured. In other embodiments, the adapter rod 300 can also be fixed to the measuring rod 210 by screw connection or welding.

[0032] In one embodiment, a threaded through hole is provided on the adapter rod 300 below the threaded column 320 to form a mounting position 310, and the connecting portion 410 of the measuring pin 400 has an external thread, and the connecting portion 410 is inserted into the threaded through hole and is threadedly connected to the inner surface of the threaded through hole. In other words, the measuring pin 400 is also fixed to the adapter rod 300 by a threaded connection. Preferably, the threaded through hole is a countersunk hole. In another embodiment, a threaded groove is provided on a side of the adapter rod 300 adjacent to the measuring pin 400 below the threaded column 320 to form a mounting position 310, and the connecting portion 410 of the measuring pin 400 has an external thread, and the connecting portion 410 is inserted into the threaded groove and is threadedly connected to the inner surface of the threaded groove. In this way, the difficulty of assembling the measuring pin 400 and the adapter rod 300 is reduced.

[0033] It should be noted that, in this embodiment, a plurality of probes 400 of different sizes and models can be designed to measure the hole positions of the part to be measured. Figure 6 The measuring needle further includes a tapered transition portion 430 located between the connecting portion 410 and the tapered detection portion 420 and fixedly connected to the connecting portion 410, and an annular portion 440 connecting the tapered transition portion 430 and the tapered detection portion 420, and the diameter of the annular portion 440 is the same as the maximum diameter on the tapered detection portion 420. Further, the diameter of the annular portion 440 is between 2.5-3.5 mm, the length of the tapered detection portion 420 is between 3-10 mm, the cone angle of the tapered detection portion 420 is between 30°-60°, and the overall length of the measuring needle is between 15-20 mm. Figure 6 The diagram shows three different types of measuring needle 400 structures, namely, the diameter of the measuring needle's annular portion 440 is 2.5 mm, the measuring needle length is 17 mm, and the cone angle of the conical detection portion 420 is 30°; the diameter of the measuring needle's annular portion 440 is 3 mm, the measuring needle length is 15 mm, and the cone angle of the conical detection portion 420 is 60°; the diameter of the measuring needle's annular portion 440 is 3 mm, the measuring needle length is 20 mm, and the cone angle of the conical detection portion 420 is 30°. The length of the connecting portion 410 of the above three measuring needles 400 is the same. In actual production, multiple measuring needles 400 of different types and sizes can be further designed according to the size of the hole to be measured. According to the change of the size of the measuring needle 400, the diameter of the connecting portion 410 can be adjusted accordingly to meet the measurement requirements of holes of different sizes. In order to prevent the end of the measuring needle 400 from scratching the part to be measured, the small diameter end of the tapered detection portion 420 is a planar structure, and the edge of the planar structure has an arc transition portion to prevent the measuring needle 400 from scratching the surface of the part to be measured when inserted into the hole to be measured.

[0034] Please combine Figure 1-2 as well as Figure 5-6 , multiple installation positions 310 for adapting to different sizes of measuring pins 400 are arranged from top to bottom at intervals on the adapter rod 300. Specifically, when the installation position 310 is a threaded through hole or a threaded groove, the inner diameters of the installation positions 310 on the adapter rod 300 are different, so that the adapter rod 300 can be assembled with measuring pins 400 of different sizes, and the hole position can be measured by the measuring pins 400 of corresponding sizes and models. In addition, in this embodiment, a gripping notch 330 is provided on the side of the adapter rod 300 facing away from the measuring pin 400, and the vertical section of the gripping notch 330 is a right-angled trapezoidal structure, and the inner side surface of the gripping notch 330 adjacent to the bottom end of the adapter rod 300 is an inclined surface, so that during the height adjustment process of the measuring pin 400, a tool or a finger can be inserted into the gripping notch 330 and the adapter rod 300 can be lifted, so that the measuring pin 400 can be accurately inserted into the hole position to be measured, so as to reduce the difficulty of height adjustment of the measuring pin 400.

[0035] In the process of measuring the hole distance of the part hole position, first install the micrometer 200 on the fixed bracket 100, assemble the adapter rod 300 and the measuring needle 400, and fix the adapter rod 300 on the measuring rod 210 of the micrometer 200. Then adjust the height of the micrometer 200 and the measuring needle 400 to return the pointer of the micrometer 200 to zero. When measuring, adjust the hole position of the measured part so that the conical surface of the measuring needle 400 fits with the measured hole to play the role of locating the center of the circle, record the reading value of the micrometer 200, and add the radius of the annular portion 440 of the measuring needle 400 to obtain the height value from the center of the side hole of the part to the bottom edge, and complete the hole distance measurement of the hole position. In actual use, the method of use can also be adjusted according to the measurement requirements, which will not be repeated here.

[0036] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A precision parts hole distance measuring device, characterized in that: include: Fixed bracket; A dial gauge, the dial gauge is mounted on the fixed bracket, and the dial gauge is provided with a measuring rod extending in a direction away from the center of the dial gauge; A transfer rod, which is fixed to the end of the measuring rod and extends along the length direction of the measuring rod, and is provided with at least one mounting position; as well as The measuring needle has an axial direction perpendicular to the axial direction of the adapter rod, and the measuring needle includes a connecting portion detachably mounted at the mounting position, and a conical detection portion fixedly connected to the connecting portion and used for inserting into the hole to be measured, wherein the annular side surface of the conical detection portion is a conical surface.

2. The precision parts hole distance measuring device according to claim 1 is characterized in that: A threaded installation groove is provided at the bottom of the measuring rod, and a threaded column is provided at the top of the transfer rod, which is inserted into the threaded installation groove and threadedly connected with the inner wall of the threaded installation groove.

3. The precision parts hole distance measuring device according to claim 2, characterized in that: A threaded through hole is provided on the adapter rod below the threaded column to form the installation position. The connecting portion of the measuring needle has an external thread. The connecting portion is inserted into the threaded through hole and is threadedly connected to the inner surface of the threaded through hole.

4. The precision parts hole distance measuring device according to claim 2, characterized in that: A threaded groove is provided on one side of the transfer rod adjacent to the measuring needle below the threaded column to form the installation position. The connecting portion of the measuring needle has an external thread, which is inserted into the threaded groove and threadedly connected to the inner surface of the threaded groove.

5. The precision parts hole distance measuring device according to claim 3 or 4, characterized in that: A plurality of mounting positions for adapting to measuring needles of different sizes are arranged at intervals from top to bottom on the transfer rod.

6. The precision parts hole distance measuring device according to claim 1, characterized in that: A gripping notch is provided on the side of the transfer rod facing away from the measuring needle. The vertical section of the gripping notch is a right-angle trapezoidal structure, and the inner side surface of the gripping notch adjacent to the bottom end of the transfer rod is an inclined surface.

7. The precision parts hole distance measuring device according to claim 1, characterized in that: The measuring needle also includes a conical transition portion located between the connecting portion and the conical detection portion and fixedly connected to the connecting portion, and an annular portion connecting the conical transition portion and the conical detection portion, wherein the diameter of the annular portion is the same as the maximum diameter on the conical detection portion.

8. The precision parts hole distance measuring device according to claim 7, characterized in that: The diameter of the annular portion is between 2.5-3.5 mm, the length of the conical detection portion is between 3-10 mm, and the cone angle of the conical detection portion is between 30°-60°.

9. The precision parts hole distance measuring device according to claim 1, characterized in that: The fixed bracket includes a base, a column fixed on the base, a cantilever slidably sleeved on the column and capable of being raised and lowered, and a locking member for limiting the installation height of the cantilever on the column. The micrometer is installed at the end of the cantilever.

10. The precision parts hole distance measuring device according to claim 9, characterized in that: Two arc-shaped claws are arranged opposite to each other at one end of the cantilever adjacent to the column, and a connection channel for penetrating the column is formed between the two arc-shaped claws. The locking member sequentially penetrates the ends of the two arc-shaped claws and is threadedly connected to the nut so that the arc-shaped claws press the column.

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