An outer diameter detection fixture

Abstract

The present application belongs to the field of mechanical processing technology and provides an outer diameter detection jig for detecting the outer diameter of a rod-shaped workpiece; the outer diameter detection jig includes a base plate, a movable seat, a first screw assembly, an outer diameter measuring device and a height adjustment mechanism, and a guide rail is provided on the base plate; the movable seat is used to fix the workpiece, and the movable seat is set on the guide rail; the first screw assembly is connected to the movable seat and drives the movable seat to move on the guide rail; the outer diameter measuring device is set on the base plate, and the outer diameter measuring device has an irradiation end and a receiving end relatively set on both sides of the guide rail, and the area between the irradiation end and the receiving end on the guide rail is configured as a measurement area; the height adjustment mechanism is connected to the outer diameter measuring device, and the height adjustment mechanism is used to move the outer diameter measuring device up and down to adjust the height position of the measurement area on the guide rail. The present application solves the technical problems of the existing detection device in that multi-point outer diameter detection is cumbersome and the detection efficiency is low.

Description

Technical Field

[0001] The present application belongs to the field of mechanical processing technology, and particularly relates to a jig for detecting the outer diameter of a rod-shaped workpiece. Background Art

[0002] With the rapid development of technology, market demand for mechanical products is increasing, and quality requirements are also becoming increasingly stringent. Therefore, dimensional measurement of workpieces during the production process is particularly important, as precise control of product dimensions ensures the quality of the finished product. Currently, many products, especially those with multi-stage machining on the outer surface of a rod, require multi-point outer diameter inspection to meet customer requirements.

[0003] The existing technology uses a single-point fixed measurement method. Specifically, a bracket for fixing the product is provided on the measuring equipment, and the product is fixed on the bracket for single-point measurement. When the outer diameter of the product needs to be inspected at multiple points, multiple sets of inspection equipment are required to perform measurements in an orderly manner. This method requires the product to be clamped on multiple inspection devices; after measurement is completed on one inspection device, it must be removed and transferred to another inspection device for further measurement. It can be seen that this operation needs to be repeated on the product multiple times to complete the entire inspection process, which is very cumbersome and time-consuming, and the inspection efficiency is extremely low. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide an outer diameter detection jig to solve the technical problems of the prior art detection device in that the multi-point outer diameter detection operation is cumbersome and the detection efficiency is low.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in this application is to provide an outer diameter detection jig for detecting the outer diameter of a rod-shaped workpiece, the outer diameter detection jig comprising:

[0006] A bottom plate, wherein a guide rail is provided on the bottom plate;

[0007] A movable seat, used for fixing a workpiece, wherein the movable seat is arranged on the guide rail;

[0008] a first screw rod assembly connected to the movable seat and driving the movable seat to move on the guide rail;

[0009] an outer diameter measuring device disposed on the bottom plate, the outer diameter measuring device having an irradiation end and a receiving end disposed opposite to each other on both sides of the guide rail, wherein an area between the irradiation end and the receiving end on the guide rail is configured as a measurement area;

[0010] A height adjustment mechanism is connected to the outer diameter measuring device, and is used to move the outer diameter measuring device up and down to adjust the height position of the measuring area on the guide rail.

[0011] The beneficial effect of the outer diameter detection jig provided by the present application is that, compared with the prior art, the outer diameter detection jig of the present application can complete the detection of multiple points of the rod-shaped workpiece product with a single clamping. The movable seat of the outer diameter detection jig is set on the guide rail, and the first screw assembly is manually operated to drive the movable seat to move on the guide rail, thereby realizing loading and moving the detection point on the workpiece to the measurement area of ​​the outer diameter measuring device. The detection point on the workpiece can be changed without repeated disassembly and assembly of the workpiece, and continuous operation of multiple detection points on the workpiece can be achieved. It is easy to use and effectively improves the detection efficiency. Since there is no need for repeated disassembly and assembly operations, and the switching and detection of multiple detection points can be completed on the same equipment, the detection personnel can independently complete the entire multi-point detection process, effectively reducing the personnel input cost.

[0012] In addition, in order to address the versatility issue of workpieces of different specifications, the outer diameter detection fixture of the present application also has a height adjustment mechanism that can move the outer diameter measurer up and down. The height adjustment mechanism can adjust the height of the measuring area on the outer diameter measurer, thereby adapting to workpieces of different specifications or the shapes of different detection points on the workpiece, so that all detection points can be completely measured within the measuring area of ​​the outer diameter measurer, thereby improving the adaptability to the workpiece and the detection points on the workpiece.

[0013] The structure of the movable seat is improved. The movable seat is provided with a plurality of shelves for positioning the workpiece, and each of the shelves has a fixing groove for the workpiece to be embedded; the plurality of shelves are arranged on the movable seat in an orderly manner along the length direction of the guide rail, and the shelves are spaced apart to form a gap for the measurement light to irradiate. In this way, the structure for fixing the workpiece on the movable seat is very simple, and the workpiece can be fixed at the same time by using a plurality of shelves and the fixing grooves on the shelves. There is no need to set a clamping structure on the movable seat to fix the workpiece, which effectively avoids damage to the workpiece caused by the clamping structure. The workpiece can be easily placed on the shelf and embedded in the fixing groove on the shelf, so that the workpiece can be fixed and positioned. In addition, the gaps are formed by the spacing between the shelves, and the gaps can allow the detection irradiation line between the irradiation end and the receiving end of the outer diameter measuring instrument to pass through, so that the detection points on the workpiece can be completely within the range of the detection irradiation line, effectively ensuring the accuracy of the measurement results.

[0014] An improvement has been made to the shelf mounting structure of the movable seat. The movable seat has multiple sockets for mounting the shelves, which are arranged in an orderly manner along the length of the guide rail. The shelves selectively plug into the sockets. This allows the position and spacing between the shelves to be adjusted according to the location of the inspection points on the workpiece, thereby accommodating the differences in the location of the inspection points on different workpieces and effectively improving the adaptability to workpieces of different specifications.

[0015] Another improvement to the shelf mounting structure of the movable base is that the movable base is provided with mounting slots for inserting the multiple shelves. The movable base has symmetrically arranged ribs on the inner walls of the mounting slots on opposite sides. Adjacent ribs are spaced apart to form slots for selectively inserting the shelves. This allows shelves to be selectively installed in the slots on either side at corresponding locations, thereby adjusting the gap position and spacing between adjacent shelves and effectively accommodating the differences in inspection points on different workpieces.

[0016] The fixing groove structure on the shelf is improved. The fixing groove on the shelf is a tapered groove that gradually shrinks towards the depth of the groove body, and the fixing grooves on each shelf are coaxially aligned. In this way, the fixing grooves on the shelf are arranged in a tapered groove, which is conducive to fixing and positioning the workpiece, effectively preventing the product from rolling, shifting or falling, thereby improving the fixing effect of the workpiece, avoiding the use of a clamping structure, and preventing damage to the workpiece. Among them, the fixing grooves on each shelf are coaxially aligned, thereby limiting the placement posture of the workpiece. The rod-shaped workpiece is arranged parallel to the guide rail, and at the same time, the workpiece and the irradiation line in the measuring area of ​​the outer diameter measuring instrument are perpendicular to each other, effectively ensuring the accuracy of the measurement results.

[0017] The structure of the movable seat has been further improved. Each end of the movable seat is provided with a limit plate for abutting the end of the workpiece. The limit plates have connecting arms extending toward either side of the movable seat, each with an elongated hole. Both sides of the movable seat are provided with slots for the connecting arms to slide into and out of, and fixing bolts located within the slots. The fixing bolts penetrate the elongated holes in the connecting arms and are used to lock the connecting arms. In this way, the limit plates are displaced on the movable seat via the connecting arms, thereby adjusting the distance between the limit plates at both ends of the movable seat, effectively adapting to different workpiece lengths and improving adaptability to workpieces of varying specifications.

[0018] The structure of the first screw rod assembly is improved. The first screw rod assembly includes a first screw rod, a first knob, and a first base located at both ends of the first screw rod. The first base is provided with a first bearing, and the first screw rod is connected to the first bearing; the movable seat is provided with a connecting ear, and the connecting ear is sleeved on the first screw rod; the first knob is provided at one end of the first screw rod for manual rotation of the first screw rod to move the connecting ear on the first screw rod, thereby driving the movable seat to translate along the guide rail. In this way, the screw rod structure is used to adjust the position of the movable seat, thereby improving the positioning accuracy of the detection point when changing the detection point of the workpiece. Multiple detection points of the workpiece can be changed without repeated clamping and transfer operations on the workpiece, effectively reducing personnel input costs and improving operational efficiency.

[0019] Optionally, the outer diameter inspection jig further includes a distance measuring device and a digital display mounted on the base plate, the distance measuring device being electrically connected to the digital display. A reflector is mounted on the movable base, positioned opposite the distance measuring transmitter on the distance measuring device. The inspection results generated by the distance measuring device are displayed on the digital display, allowing the operator to determine the position of the movable base, thereby enabling better translation of the movable base to locate the inspection point on the workpiece, effectively improving operational efficiency.

[0020] The structure of the height adjustment mechanism has been improved. The height adjustment mechanism includes a second screw assembly and a bracket mounted on the base plate. The second screw assembly includes a connecting plate, a second screw, a second knob, and second bases mounted at the upper and lower ends of the bracket. The connecting plate is connected to the outer diameter measuring device and has a screw hole for receiving the second screw. The second bases are each provided with a second bearing, and the ends of the second screw are respectively connected to the second bearings. The second knob is mounted on the upper end of the second screw to allow manual rotation of the second screw, so that the connecting plate moves on the second screw and drives the outer diameter measuring device up and down, thereby adjusting the height position of the measuring area on the outer diameter measuring device on the guide rail. In this way, the use of a screw structure for position adjustment is conducive to improving the accuracy of adjusting the height position of the measuring area, effectively adapting to the differences in the inspection points of workpieces of different specifications, and ensuring that the workpieces and the inspection points on them fall completely within the inspection radiation range, thereby improving the adaptability of the fixture.

[0021] Optionally, the bracket is provided with a slide rail disposed perpendicularly to the base plate, the outer diameter measuring device is mounted with a lining plate, and the lining plate is provided with a slider connected to the slide rail, so that the outer diameter measuring device moves up and down along the slide rail via the slider on the lining plate. In this manner, the connecting plate drives the outer diameter measuring device to move along the slide rail as it moves up and down, effectively maintaining the outer diameter measuring device's verticality on the base plate, thereby improving the accuracy of the vertical displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 A schematic diagram of the three-dimensional structure of a rod-shaped workpiece provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the three-dimensional structure of the outer diameter detection fixture provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the top view of the outer diameter detection fixture provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of the structure of an outer diameter measuring device provided in an embodiment of the present application located on a guide rail;

[0027] Figure 5 A schematic diagram of the three-dimensional structure of the movable seat provided in an embodiment of the present application;

[0028] Figure 6 A schematic diagram of a shelf installation structure on a movable seat provided in an embodiment of the present application;

[0029] Figure 7 A schematic diagram of another shelf installation structure on a movable seat provided in an embodiment of the present application;

[0030] Figure 8 A top view of a movable seat of another shelf mounting structure provided in an embodiment of the present application;

[0031] Figure 9 for Figure 7 A partial enlarged view of part A;

[0032] Figure 10 A schematic diagram of another three-dimensional structure of a shelf on a movable seat provided in an embodiment of the present application;

[0033] Figure 11 An exploded structural diagram of the movable seat and the first screw rod assembly on the base plate provided in an embodiment of the present application;

[0034] Figure 12 A schematic cross-sectional view of the outer diameter detection fixture provided in an embodiment of the present application;

[0035] Figure 13The explosion structure of the height adjustment mechanism and outer diameter measuring device on the bottom plate provided in the embodiment of the present application Figure 1 ;

[0036] Figure 14 The explosion structure of the height adjustment mechanism and outer diameter measuring device on the bottom plate provided in the embodiment of the present application Figure 2 .

[0037] Among them, the reference numerals in the figures are:

[0038] 100-workpiece;

[0039] 1-base plate; 11-guide rail; 12-distance measuring device; 13-digital display;

[0040] 2 - movable seat; 21 - shelf; 211 - fixing slot; 212 - gap; 213 - buckle angle; 214 - buckle slot; 22 - socket; 23 - mounting slot; 231 - rib; 232 - slot; 233 - buckle joint; 24 - limit plate; 241 - connecting arm; 242 - long hole; 25 - slide slot; 251 - fixing bolt; 26 - connecting ear; 27 - reflector;

[0041] 3-first screw assembly; 31-first screw; 32-first knob; 33-first base; 34-first bearing;

[0042] 4-outer diameter measuring device; 41-illuminating end; 42-receiving end; 43-lining plate; 431-slider; 432-groove;

[0043] 5-height adjustment mechanism; 51-bracket; 511-support plate; 52-slide rail;

[0044] 6 - second screw rod assembly; 61 - connecting plate; 611 - screw hole; 62 - second screw rod; 63 - second knob; 64 - second base; 641 - second bearing; DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0046] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0047] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0049] like Figure 1 As shown, a rod-shaped workpiece has areas with different outer diameters. After processing, these areas need to be inspected to ensure processing quality and accuracy. In this embodiment, the rod-shaped workpiece is a cylindrical rod with multiple concave and convex rings P of different shapes on its outer circumference. After processing, the outer diameter of each concave and convex ring P on the workpiece needs to be measured.

[0050] In related technologies, when performing multi-point inspection on the outer diameter of the aforementioned workpiece, multiple sets of inspection equipment are required to perform measurements sequentially. This method requires the workpiece to be clamped on the fixed brackets of multiple inspection devices; after the measurement is completed, it is removed and transferred to another inspection device for further inspection. During the aforementioned inspection process, the workpiece needs to be repeatedly clamped and transferred to complete the entire inspection process. This makes the entire inspection process very cumbersome and time-consuming, and the inspection efficiency is extremely low.

[0051] Furthermore, the workpiece mounting brackets on testing equipment are typically custom-made, meaning the fixtures can only accommodate workpieces of a specific model. This limits the versatility of testing across different product models. Workpieces of varying specifications require dedicated testing equipment and mounting brackets, increasing equipment costs.

[0052] Here, the embodiment of the present application provides a new type of outer diameter detection fixture, which is now described in detail. Please refer to Figure 2 、 Figure 3 and Figure 4 The outer diameter detection fixture is used to detect the outer diameter of a rod-shaped workpiece 100, and includes a base plate 1, a movable seat 2, a first screw assembly 3, an outer diameter measuring device 4 and a height adjustment mechanism 5.

[0053] The base plate 1 is provided with a guide rail 11, the movable seat 2 is arranged on the guide rail 11, and the workpiece 100 to be inspected is mounted and fixed on the movable seat 2. In this embodiment, when the workpiece 100 is fixed on the movable seat 2, the workpiece 100 is arranged parallel to the guide rail 11.

[0054] The first screw assembly 3 is connected to the movable seat 2 and can drive the movable seat 2 to move on the guide rail 11, thereby realizing material loading and moving the detection point on the workpiece 100 to the measurement area.

[0055] The outer diameter measuring device 4 is set on the bottom plate 1. The outer diameter measuring device 4 can adopt a common outer diameter measuring instrument. Its working principle is to emit detection light to the detection point of the detected part through the irradiation end on one side, and the receiving end on the other side collects the light range blocked by the detection point of the detected part, thereby obtaining the outer diameter of the detection point. In this embodiment, Figure 4 As shown, the outer diameter measuring device 4 has the above-mentioned irradiation end 41 and receiving end 42, and the irradiation end 41 and the receiving end 42 are arranged on both sides of the guide rail 11 opposite to each other, and the area between the irradiation end 41 and the receiving end 42 on the guide rail 11 is configured as the measurement area M.

[0056] The height adjustment mechanism 5 is connected to the outer diameter measuring device 4 , and is used to move the outer diameter measuring device 4 up and down to adjust the height position of the measuring area M on the guide rail 11 .

[0057] Compared to existing technologies, the outer diameter inspection jig provided in the present embodiment of the present invention can perform multi-point inspections on rod-shaped workpieces with a single clamping operation. The movable base 2 of the outer diameter inspection jig is mounted on a guide rail 11, and a first screw assembly 3 is manually operated to drive the movable base 2 along the guide rail 11, thereby enabling loading and moving the inspection points on the workpiece 100 to the measurement area M of the outer diameter measuring device 4.

[0058] In actual operation, the workpiece 100 is first fixed to the movable base 2. The first screw assembly 3 is then operated to drive the movable base 2 to move along the guide rail 11, thereby moving the workpiece 100 onto the outer diameter measuring device 4 and moving the inspection point on the workpiece 100 to the measurement area M of the outer diameter measuring device 4. When it is necessary to switch inspection points, the first screw assembly 3 is used to drive the movable base 2 to translate on the guide rail 11 to move the next inspection point on the workpiece 100 to the measurement area M of the outer diameter measuring device 4. This translation operation is repeated until the measurement of each inspection point is completed.

[0059] It can be seen that the detection points on the workpiece 100 can be changed without re-disassembling the workpiece 100, so that multiple detection points on the workpiece 100 can be operated continuously, which is easy to use and effectively improves the detection efficiency.

[0060] Since there is no need for repeated disassembly and assembly operations, and switching and testing of multiple detection points can be completed on the same device, the inspectors can independently complete the entire multi-point detection process, effectively reducing personnel input costs.

[0061] In addition, in order to address the versatility issue of workpieces 100 of different specifications, the outer diameter detection fixture of the present application also has a height adjustment mechanism 5 that can move the outer diameter measurer 4 up and down. The height adjustment mechanism 5 can adjust the height of the measuring area M on the outer diameter measurer 4, thereby adapting to workpieces 100 of different specifications or the shapes of different detection points on the workpiece 100, so that all detection points can be completely measured within the measurement area M of the outer diameter measurer 4, thereby improving the adaptability to detecting workpieces 100 and detection points on the workpiece.

[0062] It should be noted that when the rod-shaped workpiece 100 is fixed on the movable seat 2, the workpiece 100 is parallel to the guide rail 11. As described above, according to the working principle of the outer diameter measuring device 4, the irradiation end 41 on the outer diameter measuring device 4 emits a detection irradiation light from one side of the guide rail 11 to the receiving end 42 on the other side opposite thereto. Utilizing the optical shielding principle, the receiving end 42 obtains the outer diameter of the detection point according to the range of the irradiation light blocked by the detection point on the workpiece 100. It can be seen that during the detection process, the entire thickness cross-section of the workpiece 100 needs to be placed within the above-mentioned detection irradiation light range in order to obtain the outer diameter of the detection point of the workpiece 100. However, when the workpiece 100 is placed on the movable seat 2, it is necessary to fix the workpiece 100 from both sides without blocking the detection irradiation line, which makes the structure for fixing the workpiece 100 on the movable seat 2 particularly difficult.

[0063] Here, in one embodiment of the present application, please refer to Figure 5 , the movable seat 2 is provided with a plurality of shelves 21 for positioning the workpiece 100, and each shelf 21 has a fixing groove 211 for the workpiece 100 to be embedded. In this way, the structure for fixing the workpiece 100 on the movable seat 2 is very simple, and the workpiece 100 can be fixed at the same time by using a plurality of shelves 21 and the fixing grooves 211 on the shelves 21. There is no need to set a clamping structure on the movable seat 2 to fix the workpiece 100, which effectively prevents the clamping structure from causing damage to the workpiece 100. The workpiece 100 can be easily placed on the shelf 21 and embedded in the fixing groove 211 on the shelf 21, so that the workpiece 100 can be fixed and positioned. In particular, for the cylindrical rod-shaped workpiece 100 of this embodiment, it can effectively prevent the workpiece 100 from rolling and falling.

[0064] The plurality of shelves 21 are arranged in an orderly fashion along the length of the guide rail 11 on the movable base 2. The shelves 21 are spaced apart to form gaps 212 for the measurement light. These gaps 212 allow the detection beam between the illuminating end 41 and the receiving end 42 of the outer diameter measuring device 4 to pass through. This ensures that the detection points (thickness cross-sections) on the workpiece 100 are completely within the detection beam, effectively ensuring the accuracy of the measurement results.

[0065] In practical applications, since different specifications of workpieces 100 require different locations to be inspected, the position of the irradiation gap 212 between the shelves 21 on the movable seat 2 needs to be adjusted to accommodate the differences in inspection positioning.

[0066] Here, in one embodiment of the present application, please refer to Figure 6 The movable base 2 has a plurality of insertion holes 22 for mounting the shelf 21. The plurality of insertion holes 22 are arranged in an orderly manner along the length of the guide rail 11. The shelf 21 can be selectively inserted into the insertion holes 22. The insertion holes 22 can be configured as elongated holes that match the overall shape of the bottom of the shelf 21, or as short holes that only allow the bottom protrusion of the shelf 21 to be inserted.

[0067] In this way, the position and spacing of the gap 212 between the shelves 21 can be adjusted according to the position of the detection points on the workpiece 100, thereby cooperating with the position differences of the detection points on different workpieces 100 and effectively improving the adaptability to workpieces 100 of different specifications.

[0068] In another embodiment of this application, please refer to Figure 7 and Figure 8 The movable seat 2 is provided with a mounting groove 23 for embedding the plurality of shelves 21. The movable seat 2 is provided with a plurality of symmetrically arranged ribs 231 on the inner walls on opposite sides of the mounting groove 23. Adjacent ribs 231 are spaced apart to form slots 232 for selective insertion of the shelves 21. Figure 9 As shown, the upper end surface of the rib 231 can be preferably an arc-shaped surface to facilitate the insertion of the shelf 21 into the slot 232. In this way, the shelf 21 can be selectively placed on the two side slots 232 at corresponding positions, thereby adjusting the position and spacing of the gap 212 between adjacent shelves 21 to effectively accommodate the differences in the detection points on different workpieces 100.

[0069] In this embodiment, if Figure 9 and Figure 10As shown, a buckle joint 233 is provided on the extended end of the rib 231. Correspondingly, the buckle portion on the shelf 21 for buckling the card slot 232 is provided with a buckle angle 213 and a buckle groove 214. After the buckle angle 213 is buckled into the card slot 232, the lower corners of the shelf 21 on both sides are placed on the edge of the installation groove 23, thereby improving the positioning effect. The buckle groove 214 and the buckle joint 233 on the rib 231 are matched in shape and buckled with each other, thereby improving the fixing effect. Among them, since the buckle joint 233 is provided on the extended end of the rib 231, a card slot 232 structure with a narrow entrance and a deep and wide groove is formed between adjacent ribs 231, which is conducive to improving the clamping effect. As shown Figure 9 As shown, the snap joint 233 can preferably be a cylinder on the extended end of the rib 231, and its upper end is preferably a spherical structure, which is conducive to the snap connection part on the shelf 21 being easily snapped into the slot 232, thereby improving installation efficiency.

[0070] Regarding the structure of the fixing groove 211 on the shelf 21, in one embodiment of the present application, please refer to Figure 5 The fixing grooves 211 on the shelves 21 are tapered grooves that gradually taper toward the depth of the groove body. The fixing grooves 211 on each shelf 21 are coaxially aligned. Thus, the tapered shape of the fixing grooves 211 on the shelves facilitates the fixing and positioning of the workpiece 100, effectively preventing the product from rolling, shifting, or falling, thereby improving the fixing effect of the workpiece 100 and avoiding the use of a clamping structure to prevent damage to the workpiece 100.

[0071] The fixing slots 211 on each shelf 21 are coaxially aligned to define the placement of the workpiece 100. This positions the rod-shaped workpiece 100 parallel to the guide rail 11 and aligns the workpiece 100 with the illumination line of the measuring area M of the outer diameter measuring device 4 perpendicularly, effectively ensuring the accuracy of the measurement results.

[0072] For the structure on the movable seat 2, in another embodiment of the present application, please refer to Figure 5 , each end of the movable seat 2 is provided with a limit plate 24 for stopping the end of the workpiece 100. The limit plate 24 has a connecting arm 241 extending to both sides of the movable seat 2, and the connecting arm 241 is provided with a long hole 242. On both sides of the movable seat 2 are provided a slide groove 25 for the connecting arm 241 to slide into and a fixing bolt 251 located in the slide groove 25. The fixing bolt 251 passes through the long hole 242 on the connecting arm 241 and is used to lock the connecting arm 241. In this way, the limit plate 24 can be displaced on the movable seat 2 with the connecting arm 241, thereby adjusting the distance between the limit plates 24 on both ends of the movable seat 2, effectively adapting to different lengths of the workpiece 100, and improving the adaptability to workpieces 100 of different specifications.

[0073] For the structure of the movable seat 2, as Figure 11As shown, the movable seat 2 can preferably be composed of a detachably connected upper seat, a middle seat, and a base. The upper seat is used to mount the workpiece and provide related structures for fixing the workpiece. The middle seat serves as a connector for the upper seat to be mounted on the base. The base has a through slot for mounting on the guide rail. In this way, the upper seat of the movable seat 2 can be configured according to workpieces of different specifications. By replacing different upper seats, different workpiece mounting requirements can be adapted, thereby improving the adaptability of the movable seat 2.

[0074] For the structure of the first screw assembly 3, please refer to the embodiment of the present application. Figure 11 and Figure 12 The first screw assembly 3 includes a first screw 31, a first knob 32 and a first base 33 located at both ends of the first screw 31. The first base 33 is provided with a first bearing 34, and the first screw 31 is connected to the first bearing 34. A connecting ear 26 is provided on the movable seat 2, and the connecting ear 26 has a screw hole for being sleeved on the first screw 31. The first knob 32 is set at one end of the first screw 31 for manual rotation of the first screw 31 to move the connecting ear 26 on the first screw 31, thereby driving the movable seat 2 to translate along the guide rail 11. In this way, the screw structure is used to adjust the position of the movable seat 2, thereby improving the positioning accuracy of the detection point when changing the detection point of the workpiece 100. Multiple detection points of the workpiece 100 can be changed without repeatedly clamping and transferring the workpiece 100, effectively reducing the personnel input cost and improving the operating efficiency.

[0075] In one embodiment of the present application, see Figure 11 The outer diameter detection fixture also includes a distance measuring device 12 and a digital display 13 disposed on the base plate 1. The distance measuring device 12 is electrically connected to the digital display 13. A reflector 27 is provided on the movable base 2. The reflector 27 is positioned opposite the distance measuring transmitter on the distance measuring device 12, so that the distance measuring light emitted from the distance measuring transmitter on the distance measuring device 12 can be irradiated by the reflector 27, thereby obtaining distance data. The distance measuring device 12 can be a common infrared rangefinder, with the infrared rangefinder's distance measuring transmitter positioned opposite the reflector 27.

[0076] In this way, the detection results generated by the distance measuring device 12 are displayed through the digital display 13, so that the operator can know the position information of the movable seat 2 and then better operate the movable seat 2 to translate to locate the detection point of the workpiece 100, effectively improving the operation efficiency.

[0077] Regarding the structure of the height adjustment mechanism 5, please refer to the embodiment of the present application. Figure 12 、 Figure 13 and Figure 14The height adjustment mechanism 5 includes a second screw assembly 6 and a bracket 51 provided on the base plate 1. Figure 11 As shown, a support plate 511 is preferably provided on the back of the bracket 51 , one side of the support plate 511 is connected to the bracket 51 , and the bottom side of the support plate 511 is connected to the bottom plate 1 , thereby improving the structural strength of the bracket 51 .

[0078] like Figure 12 and Figure 13 As shown, the second screw assembly 6 includes a connecting plate 61, a second screw 62, a second knob 63, and second bases 64 respectively provided at the upper and lower ends of the bracket 51. The connecting plate 61 is connected to the outer diameter measuring device 4, and the connecting plate 61 has a screw hole 611 for receiving the second screw 62. The second bases 64 at the upper and lower ends of the bracket 51 are both provided with second bearings 641, and the two ends of the second screw 62 are respectively connected to the aforementioned second bearings 641. The second knob 63 is provided at the upper end of the second screw 62 for manual rotation of the second screw 62, so that the connecting plate 61 moves on the second screw 62 and drives the outer diameter measuring device 4 to move up and down, thereby adjusting the height position of the measuring area M on the outer diameter measuring device 4 on the guide rail 11. In this way, the use of a screw structure for position adjustment is conducive to improving the accuracy of adjusting the height position of the measurement area M, effectively adapting to the differences in the workpieces 100 of different specifications and the detection points thereon, so that the workpiece 100 and the detection points thereon can all fall completely within the detection irradiation line range, thereby improving the adaptability of the fixture.

[0079] In this embodiment, please refer to Figure 13 and Figure 14 The bracket 51 is also equipped with a slide rail 52, which is arranged perpendicular to the base plate 1. The outer diameter measuring device 4 is mounted on a liner 43, which is equipped with a slider 431 that is connected to the slide rail. The slider 431 has a groove 432 and is connected to the slide rail 52 via the groove 432. The outer diameter measuring device 4 moves up and down along the slide rail 52 via the slider 431 on the liner 43. Thus, the connecting plate 61 drives the outer diameter measuring device 4 along the slide rail 52 during its vertical movement, effectively maintaining the vertical position of the outer diameter measuring device 4 on the base plate 1 and improving the accuracy of its vertical movement.

[0080] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An outer diameter detection jig for detecting the outer diameter of a rod-shaped workpiece, characterized in that: The outer diameter detection fixture includes: A bottom plate, wherein a guide rail is provided on the bottom plate; A movable seat, used for fixing a workpiece, wherein the movable seat is arranged on the guide rail; a first screw assembly connected to the movable seat and driving the movable seat to move on the guide rail; an outer diameter measuring device disposed on the bottom plate, the outer diameter measuring device having an irradiation end and a receiving end disposed opposite to each other on both sides of the guide rail, wherein an area between the irradiation end and the receiving end on the guide rail is configured as a measurement area; a height adjustment mechanism connected to the outer diameter measuring device, the height adjustment mechanism being used to move the outer diameter measuring device up and down to adjust the height position of the measuring area on the guide rail; The movable seat is provided with a plurality of shelves for positioning the workpiece, each of the shelves having a fixing groove for embedding the workpiece; the plurality of shelves are arranged in an orderly manner on the movable seat along the length direction of the guide rail, and the shelves are spaced apart to form gaps for the measurement light to irradiate; The movable seat has a plurality of sockets for mounting the shelves, and the plurality of sockets are sequentially arranged on the movable seat along the length direction of the guide rail; the shelves are selectively plugged into the sockets; The movable seat is provided with a mounting groove for embedding the plurality of shelves, and the movable seat is provided with a plurality of symmetrically arranged ribs on the inner walls on opposite sides of the mounting groove, and adjacent ribs are spaced apart to form slots for selective insertion of the shelves; The fixing grooves on the shelves are tapered grooves that gradually shrink toward the depth of the groove body, and the fixing grooves on the shelves are coaxially aligned. The height adjustment mechanism includes a second screw rod assembly and a bracket arranged on the base plate. The second screw rod assembly includes a connecting plate, a second screw rod, a second knob and second bases respectively arranged at the upper and lower ends of the bracket. The connecting plate is connected to the outer diameter measuring device. The connecting plate has a screw hole for sleeved with the second screw rod; the second base is provided with a second bearing, and the two ends of the second screw rod are respectively connected to the second bearing; the second knob is arranged at the upper end of the second screw rod.

2. The outer diameter detection jig according to claim 1, characterized in that: The two ends of the movable seat are respectively provided with a limit plate for stopping the end of the workpiece, and the limit plate has a connecting arm extending to both sides of the movable seat, and the connecting arm is provided with a long hole; the two sides of the movable seat are provided with a sliding groove for the connecting arm to be embedded and slid, and a fixing bolt located in the sliding groove, the fixing bolt passes through the long hole of the connecting arm and is used to lock the connecting arm.

3. The outer diameter detection jig according to claim 1, characterized in that: The first screw rod assembly includes a first screw rod, a first knob and a first base located at both ends of the first screw rod. The first base is provided with a first bearing, and the first screw rod is connected to the first bearing; the movable seat is provided with a connecting ear, and the connecting ear is sleeved on the first screw rod; the first knob is set at one end of the first screw rod.

4. The outer diameter detection jig according to claim 1, characterized in that: The outer diameter detection fixture also includes a distance measuring device and a digital display arranged on the base plate, and the distance measuring device is electrically connected to the digital display; a reflective plate is provided on the movable seat, and the reflective plate is arranged opposite to the distance measuring transmitting end on the distance measuring device.

5. The outer diameter detection jig according to any one of claims 1 to 4, characterized in that: The bracket is provided with a slide rail vertically arranged with respect to the base plate, the outer diameter measuring device is provided with a lining plate, the lining plate is provided with a slider connected with the slide rail, and the outer diameter measuring device moves up and down along the slide rail via the slider on the lining plate.

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