CN116558430A

CN116558430A - Outer diameter detection jig

Info

Publication number: CN116558430A
Application number: CN202310481686.XA
Authority: CN
Inventors: 朱龙; 杨军成; 杨松林
Original assignee: Guotai Daming Precision Technology Group Co ltd
Current assignee: Guotai Daming Precision Technology Group Co ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-08-08

Abstract

The application belongs to the technical field of machining, and provides an outer diameter detection jig for detecting the outer diameter of a rod-shaped workpiece; the outer diameter detection jig comprises a bottom plate, a movable seat, a first screw rod assembly, an outer diameter measurer and a height adjusting mechanism, wherein a guide rail is arranged on the bottom plate; the movable seat is used for fixing a workpiece and is arranged on the guide rail; the first screw rod assembly is connected with the movable seat and drives the movable seat to move on the guide rail; the outer diameter measurer is arranged on the bottom plate, and is provided with an irradiation end and a receiving end which are oppositely arranged at two sides of the guide rail, and a region between the irradiation end and the receiving end on the guide rail is configured as a measurement region; the height adjusting mechanism is connected with the outer diameter measurer and is used for moving the outer diameter measurer up and down to adjust the height position of the measuring area on the guide rail. The utility model provides a detection device carries out multiple spot position external diameter detection loaded down with trivial details, technical problem that detection efficiency is low with solving prior art.

Description

Outer diameter detection jig

Technical Field

The application belongs to the technical field of machining, and particularly relates to an outer diameter detection jig for detecting rod-shaped workpieces.

Background

With the rapid development of technology, the market demand for mechanical products is increasing, and the quality requirement is also increasing. Therefore, the dimension measurement of the workpiece product is particularly important in the production process, and the quality of the finished product is ensured by precisely controlling the dimension of the product. At present, after the processing of many products, especially the products of the multistage processing of shaft-like outer peripheral face, need to carry out external diameter multiposition detection to the product to satisfy customer's requirement to the product.

The detection mode adopted in the prior art is single-point fixed measurement, and particularly, a bracket for fixing a product is arranged on measuring equipment, so that the product is fixed on the bracket to carry out single-point measurement. When the outer diameter of the product needs to be detected in a multi-point mode, a plurality of sets of detection equipment need to be arranged for orderly measurement. This approach can result in the product requiring clamping operations on multiple inspection devices; after the measurement on one detection device is finished, the detection device is removed and transferred to the other detection device for continuous measurement. Therefore, the whole detection process can be completed only by repeating the operation for a plurality of times, which is very tedious and time-consuming and has extremely low detection efficiency.

Disclosure of Invention

An aim of the embodiment of the application is to provide an external diameter detection tool to solve prior art's detection device and carry out multiple spot external diameter detection complex operation, the technical problem that detection efficiency is low.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows: an outer diameter detection jig for detecting an outer diameter of a rod-shaped workpiece is provided, the outer diameter detection jig comprising:

the bottom plate is provided with a guide rail;

the movable seat is used for fixing a workpiece and is arranged on the guide rail;

the first screw rod assembly is connected with the movable seat and drives the movable seat to move on the guide rail;

an outer diameter measurer arranged on the bottom plate, wherein the outer diameter measurer is provided with an irradiation end and a receiving end which are oppositely arranged at two sides of the guide rail, and a region between the irradiation end and the receiving end on the guide rail is configured as a measurement region;

and the height adjusting mechanism is connected with the outer diameter measurer and is used for moving the outer diameter measurer up and down to adjust the height position of the measuring area on the guide rail.

The application provides an external diameter detects tool's beneficial effect lies in: compared with the prior art, the outer diameter detection jig can realize single clamping of rod-shaped workpiece products and can finish detection of multiple points. The movable seat of the outer diameter detection jig is arranged on the guide rail, and the first screw rod assembly is operated by a human hand to drive the movable seat to move on the guide rail, so that feeding and moving of the detection point position on the workpiece to the measurement area of the outer diameter measurer are realized. The detection points on the workpiece can be changed without repeated disassembly and assembly operations on the workpiece, so that the operation on a plurality of detection points on the workpiece is realized continuously, the use is convenient, and the detection efficiency is effectively improved. Because repeated disassembly and assembly operations are not needed, and the switching and detection of a plurality of detection points can be completed on the same equipment, detection personnel can independently complete the whole multi-point detection process, and the personnel input cost is effectively reduced.

In addition, to the commonality problem of different specification work pieces, still have on the external diameter detection tool of this application and can reciprocate the high adjustment mechanism of external diameter caliber, this high adjustment mechanism can carry out the altitude mixture control to the measuring region on the external diameter caliber to the shape of the different testing point positions on the work piece of adaptation different specifications or the work piece, make the testing point position homoenergetic be in the measuring region of external diameter caliber completely and measure, and then improve the adaptability to the testing point position on work piece and the work piece.

The structure of the movable seat is improved, a plurality of shelves for positioning the workpiece are arranged on the movable seat, and each shelf is provided with a fixing groove for embedding the workpiece; the shelves are orderly arranged on the movable seat along the length direction of the guide rail, and gaps for measuring light irradiation are formed between the shelves at intervals. Therefore, the structure for fixing the workpiece on the movable seat is very simple, and the workpiece can be fixed simultaneously by utilizing a plurality of shelves and the fixing grooves on the shelves. The movable seat is not required to be provided with a clamping structure for fixing the workpiece, so that the workpiece is effectively prevented from being damaged by the clamping structure. The workpiece can be easily placed on the shelf and is embedded into the fixing groove on the shelf, so that the workpiece can be fixed and positioned. In addition, gaps are formed between the shelves at intervals, and can allow detection irradiation rays existing between the irradiation end and the receiving end of the outer diameter measurer to pass through, so that detection points on the workpiece can be completely located in the range of the detection irradiation rays, and the accuracy of measurement results is effectively ensured.

The shelf mounting structure of the movable seat is improved, the movable seat is provided with a plurality of jacks for mounting the shelf, and the jacks are orderly arranged on the movable seat along the length direction of the guide rail; the shelf is selectively plugged into the jack. Therefore, the gap between the shelves can be adjusted in position and interval according to the positions of the detection points on the workpieces, so that the adaptability to workpieces with different specifications is effectively improved in cooperation with the position difference of the detection points on different workpieces.

The shelf mounting structure of the movable seat is improved, the movable seat is provided with mounting grooves for embedding the plurality of shelves, the inner walls of the two opposite sides of the mounting grooves of the movable seat are respectively provided with a plurality of symmetrically arranged convex ribs, and adjacent convex ribs are arranged at intervals to form clamping grooves for selectively inserting the shelves. Therefore, the shelves can be selectively arranged on the clamping grooves at two sides of the corresponding positions, so that the gap positions and the gaps between the adjacent shelves are adjusted, and the difference of detection points on different workpieces is effectively matched.

The structure of the fixing groove on the shelf is improved, the fixing groove on the shelf is a tapered groove gradually shrinking towards the deep part of the groove body, and the fixing grooves on the shelves are coaxially aligned. Therefore, the fixing groove on the shelf is arranged in the conical groove, so that the workpiece is fixed and positioned, the product is effectively prevented from rolling and shifting or falling, the fixing effect on the workpiece is improved, the clamping structure is avoided, and the workpiece is prevented from being damaged. Wherein the fixing grooves on each shelf are coaxially aligned, thereby defining the placement posture of the workpiece. The rod-shaped workpiece is arranged in parallel with the guide rail, and the irradiation lines existing in the measuring areas of the workpiece and the outer diameter measurer are mutually perpendicular, so that the accuracy of the measuring result is effectively ensured.

The structure on the movable seat is improved, limiting plates for propping against the end parts of the workpieces are respectively arranged at the two ends of the movable seat, connecting arms extending towards the two sides of the movable seat are arranged on the limiting plates, and strip holes are formed in the connecting arms; the movable seat is characterized in that sliding grooves for embedding and sliding the connecting arms and fixing bolts located in the sliding grooves are formed in two sides of the movable seat, and the fixing bolts penetrate through strip holes of the connecting arms and are used for locking the connecting arms. Therefore, the limiting plates are displaced on the movable seat through the connecting arms, so that the distance between the limiting plates at the two ends of the movable seat is adjusted, the lengths of different workpieces are effectively adapted, and the suitability of the workpieces with different specifications is improved.

The structure of a first screw rod assembly is improved, the first screw rod assembly comprises a first screw rod, a first knob and first bases positioned at two ends of the first screw rod, first bearings are arranged on the first bases, and the first screw rod is connected to the first bearings in a penetrating mode; the movable seat is provided with a connecting lug which is sleeved on the first screw rod; the first knob is arranged at one end of the first screw rod, so that the first screw rod is driven by a human hand to rotate, the connecting lug moves on the first screw rod, and the movable seat is driven to translate along the guide rail. Therefore, the movable seat is adjusted in position by adopting the screw rod structure, and the positioning accuracy of the detection point position when the detection point position of the workpiece is changed is improved. The workpiece can be changed from multiple detection points without repeated clamping and transferring operations, so that the personnel input cost is effectively reduced, and the operation efficiency is improved.

Optionally, the outer diameter detection fixture further comprises a distance measuring device and a digital display, which are arranged on the bottom plate, and the distance measuring device is electrically connected with the digital display; the movable seat is provided with a reflecting plate, and the reflecting plate is arranged opposite to a ranging transmitting end on the ranging device. Therefore, the detection result generated on the distance measuring device is displayed through the digital display, so that an operator can acquire the position information of the movable seat, and further, the movable seat is operated to translate well to position the detection point of the workpiece, and the operation efficiency is effectively improved.

The structure of the height adjusting mechanism is improved, the height adjusting mechanism comprises a second screw rod assembly and a bracket arranged on the bottom plate, the second screw rod assembly comprises a connecting plate, a second screw rod, a second knob and second bases respectively arranged at the upper end and the lower end of the bracket, the connecting plate is connected with the outer diameter measurer, and the connecting plate is provided with a screw hole sleeved with the second screw rod; the second bases are respectively provided with a second bearing, and two ends of the second screw rod are respectively connected to the second bearings in a penetrating way; the second knob is arranged at the upper end of the second screw rod, so that a human hand drives the second screw rod to rotate, the connecting plate moves on the second screw rod and drives the outer diameter measurer to move up and down, and the height position of a measuring area on the outer diameter measurer on the guide rail is adjusted. Therefore, the screw rod structure is adopted for position adjustment, the accuracy of the height position of the adjustment measurement area is improved, the difference of the detection points of the workpieces with different specifications and the workpieces with different specifications is effectively adapted, the workpieces and the detection points on the workpieces can fall into the detection irradiation line range completely, and the adaptability of the jig is improved.

Optionally, be equipped with on the support with the perpendicular slide rail that sets up of bottom plate, install the welt on the external diameter caliber, be equipped with on the welt with slide rail installation connection's slider, the external diameter caliber passes through the slider on the welt is followed the slide rail reciprocates. Therefore, the connecting plate can move along the sliding rail when driving the outer diameter measurer to move up and down, so that the verticality of the outer diameter measurer moving on the bottom plate is effectively maintained, and the accuracy of up-and-down displacement is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a rod-shaped workpiece according to an embodiment of the present application;

fig. 2 is a schematic perspective view of an external diameter detection tool according to an embodiment of the present application;

fig. 3 is a schematic top view of an outer diameter detection tool according to an embodiment of the present disclosure;

fig. 4 is a schematic structural view of an outer diameter measurer provided in an embodiment of the present application on a guide rail;

fig. 5 is a schematic perspective view of a movable seat according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of a shelf mounting structure on a movable base according to an embodiment of the present disclosure;

FIG. 7 is a schematic view of another shelf mounting structure on a movable seat according to an embodiment of the present disclosure;

FIG. 8 is a top view of a movable seat of another shelf mounting structure provided in an embodiment of the present application;

FIG. 9 is an enlarged partial view of portion A of FIG. 7;

FIG. 10 is a schematic view of another shelf perspective on a movable base according to an embodiment of the present disclosure;

FIG. 11 is an exploded view of a movable mount and a first lead screw assembly on a base plate provided in an embodiment of the present application;

fig. 12 is a schematic cross-sectional structure diagram of an outer diameter detection tool according to an embodiment of the present disclosure;

FIG. 13 is an exploded view of a first embodiment of a height adjustment mechanism and an outside diameter gauge on a base plate provided in accordance with an embodiment of the present application;

fig. 14 is a second exploded view of the height adjusting mechanism and the outer diameter measuring device on the base plate according to the embodiment of the present application.

Wherein, each reference sign in the figure:

100-workpiece;

1-a bottom plate; 11-a guide rail; 12-a distance measuring device; 13-a digital display;

2-a movable seat; 21-a shelf; 211-a fixed groove; 212-gap; 213-buckling angle; 214-a buckling groove; 22-jack; 23-mounting slots; 231-ribs; 232-a clamping groove; 233-a clasp joint; 24-limiting plates; 241-a connecting arm; 242-elongated holes; 25-sliding grooves; 251-fixing bolts; 26-connecting lugs; 27-a reflecting plate;

3-a first screw assembly; 31-a first screw rod; 32-a first knob; 33-a first base; 34-a first bearing;

4-an outer diameter measurer; 41-an irradiation end; 42-receiving end; 43-lining board; 431-slide block; 432-grooves;

5-a height adjustment mechanism; 51-a bracket; 511-a support plate; 52-sliding rails;

6-a second screw assembly; 61-connecting plates; 611-screw holes; 62-a second screw rod; 63-a second knob; 64-a second base; 641-a second bearing;

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present 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 for purposes of illustration only and are not intended to limit the present application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

As shown in fig. 1, on a rod-shaped workpiece product, there are different outer diameters, and after the production and processing, the outer diameters of the different outer diameters need to be detected, so as to ensure the processing quality and accuracy. In this embodiment, the rod-shaped workpiece product is a rod-shaped workpiece like a cylinder, and has a plurality of concave-convex rings P of different shapes on the outer periphery thereof, and it is necessary to measure the outer diameter of each concave-convex ring P on the workpiece after the processing is completed.

In the related art, when the outer diameter of the workpiece is detected in multiple points, multiple sets of detection equipment are required to be arranged for measurement in sequence. This approach can result in the workpiece requiring clamping operations on the mounting brackets of multiple inspection devices; and after the measurement is finished, the device is removed and transferred to another detection device for continuous detection. In the detection process, the workpiece is required to be clamped and transferred repeatedly for a plurality of times, so that the whole detection process can be completed. It can be seen that the whole detection process is very tedious and time-consuming, and the detection efficiency is extremely low.

In addition, the workpiece fixing bracket on the detecting equipment is generally customized, namely, the part for fixing the workpiece on the detecting equipment can only be a workpiece with a set model. Therefore, the universality of detection of products of different types and different specifications is limited, and corresponding detection equipment and corresponding special fixing parts are required to be arranged, so that the input cost of the detection equipment is increased.

In this regard, the embodiment of the present application provides a novel outer diameter detection jig, which will now be described in detail. Referring to fig. 2, 3 and 4, the outer diameter detecting jig is used for detecting an 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 measurer 4 and a height adjusting mechanism 5.

The bottom plate 1 is provided with a guide rail 11, the movable seat 2 is arranged on the guide rail 11, and a workpiece 100 to be detected is fixedly arranged on the movable seat 2. In the present embodiment, when the workpiece 100 is fixed to the movable base 2, the workpiece 100 is arranged in parallel with the guide rail 11.

The first screw rod assembly 3 is connected with the movable seat 2 and can drive the movable seat 2 to move on the guide rail 11, so that feeding is realized and a detection point on the workpiece 100 can be moved to a measurement area.

The outer diameter measurer 4 is arranged on the bottom plate 1, and the outer diameter measurer 4 can adopt a common outer diameter measurer, and the working principle is that one side of the outer diameter measurer emits detection light to a detection point position of a detected piece through an irradiation end, and the receiving end on the other side collects a light range shielded by the detection point position of the detected piece, so that the outer diameter of the detection point position is obtained. In the present embodiment, as shown in fig. 4, the outer diameter measuring instrument 4 has the above-described irradiation end 41 and receiving end 42, and the irradiation end 41 and receiving end 42 are disposed on both sides of the guide rail 11 opposite to each other, and the area on the guide rail 11 between the irradiation end 41 and receiving end 42 is configured as the measurement area M.

The height adjusting mechanism 5 is connected to the outer diameter measuring instrument 4, and the height adjusting mechanism 5 is used for moving the outer diameter measuring instrument 4 up and down to adjust the height position of the measuring area M on the guide rail 11.

Compared with the prior art, the outer diameter detection jig provided by the embodiment of the application can realize single clamping of a rod-shaped workpiece product to finish detection of multiple points. The movable seat 2 of the outer diameter detection jig is arranged on the guide rail 11, and the first screw rod assembly 3 is operated by a human hand to drive the movable seat 2 to move on the guide rail 11, so that feeding and moving of the detection point position on the workpiece 100 to the measurement area M of the outer diameter measurer 4 are realized.

In actual operation, the workpiece 100 may be fixed on the movable seat 2, and then the first screw assembly 3 is operated to drive the movable seat 2 to move along the guide rail 11, so as to move the workpiece 100 onto the outer diameter measurer 4, and move the detection point on the workpiece 100 to the measurement area M of the outer diameter measurer 4. When the detection point position needs to be switched, the first screw rod assembly 3 can be utilized to drive the movable seat 2 to translate on the guide rail 11 so as to move the next detection point position on the workpiece 100 to the measurement area M of the outer diameter measurer 4. Repeating the translation operation until the measurement of each detection point is completed.

Therefore, the detection points on the workpiece 100 can be changed without re-assembling and disassembling the workpiece 100, so that the operation on a plurality of detection points on the workpiece 100 is realized continuously, the use is convenient, and the detection efficiency is effectively improved.

Because repeated disassembly and assembly operations are not needed, and the switching and detection of a plurality of detection points can be completed on the same equipment, detection personnel can independently complete the whole multi-point detection process, and the personnel input cost is effectively reduced.

In addition, to the commonality problem of different specification work pieces 100, still have the altitude mixture control mechanism 5 that can reciprocate external diameter caliber 4 on this application on the external diameter detection tool, this altitude mixture control mechanism 5 can carry out altitude mixture control to the measuring region M on external diameter caliber 4 to the shape of the different testing point positions on the work piece 100 of adaptation different specifications or work piece 100, make the testing point position homoenergetic be in measuring region M of external diameter caliber 4 completely, and then improve the adaptability to testing the testing point position on work piece 100 and the work piece.

When the rod-shaped workpiece 100 is fixed to the movable base 2, the workpiece 100 is parallel to the guide rail 11. As described above, the principle of operation of the outer diameter measuring device 4 is that the irradiation end 41 of the outer diameter measuring device 4 emits the detection irradiation light from one side of the guide rail 11 to the receiving end 42 of the opposite side thereof. By using the optical shielding principle, the receiving end 42 shields the irradiation light range according to the detection point position on the workpiece 100, and obtains the outer diameter of the detection point position. It can be seen that, in the inspection process, the entire thickness section of the workpiece 100 needs to be placed in the above-mentioned irradiation light range for inspection, so as to obtain the outer diameter of the inspection point of the workpiece 100. However, when the workpiece 100 is placed on the movable base 2, the workpiece 100 needs to be fixed from both sides, and the detection radiation is not blocked, which makes it difficult to fix the workpiece 100 on the movable base 2.

In this regard, in one embodiment of the present application, referring to fig. 5, a plurality of shelves 21 for positioning the workpiece 100 are provided on the movable base 2, and each of the shelves 21 has a fixing groove 211 into which the workpiece 100 is inserted. In this way, the structure of the movable base 2 for fixing the workpiece 100 is very simple, and the workpiece 100 can be fixed simultaneously by the plurality of shelves 21 and the fixing grooves 211 on the shelves 21. The movable seat 2 is not required to be provided with a clamping structure to fix the workpiece 100, so that the workpiece 100 is effectively prevented from being damaged by the clamping structure. The workpiece 100 can be easily placed on the shelf 21 and is embedded into the fixing groove 211 on the shelf 21, so that the workpiece 100 can be fixed and positioned. Particularly, with the cylindrical rod-shaped workpiece 100 of the present embodiment, the workpiece 100 can be effectively prevented from being easily fallen down while tumbling.

The plurality of shelves 21 are orderly arranged on the movable seat 2 along the length direction of the guide rail 11, and gaps 212 for the irradiation of measuring light are formed between the shelves 21 at intervals. The gap 212 allows the detection irradiation line existing between the irradiation end 41 and the receiving end 42 of the outer diameter measuring instrument 4 to pass through, and allows the detection point (thickness section) on the workpiece 100 to be entirely within the detection irradiation line range, thereby effectively ensuring the accuracy of the measurement result.

In practical applications, since the parts to be detected on the workpieces 100 of different specifications are different, the positions of the irradiation gaps 212 between the shelves 21 on the movable base 2 need to be adjusted to adapt to the difference in detection positioning.

In this regard, in one embodiment of the present application, referring to fig. 6, the movable base 2 has a plurality of insertion holes 22 for installing the shelf 21, and the plurality of insertion holes 22 are sequentially opened on the movable base 2 along the length direction of the guide rail 11. The shelf 21 is selectively insertable into the receptacle 22. The insertion hole 22 may be a long hole integrally formed with the bottom of the shelf 21, or a short hole into which only the bottom protrusion of the shelf 21 is inserted.

In this way, the gap 212 between the shelves 21 can be adjusted in position and interval according to the positions of the detection points on the workpieces 100, so that the adaptability to workpieces 100 with different specifications is effectively improved according to the difference of the positions of the detection points on different workpieces 100.

In another embodiment of the present application, referring to fig. 7 and 8, the movable seat 2 is provided with a mounting groove 23 for embedding the plurality of shelves 21, the movable seat 2 is respectively provided with a plurality of symmetrically arranged ribs 231 on two opposite side inner walls of the mounting groove 23, and a clamping groove 232 for selectively inserting the shelves 21 is formed between adjacent ribs 231 at intervals. As shown in fig. 9, the upper end surface of the rib 231 may preferably be an arc surface to facilitate insertion of the shelf 21 into the card slot 232. In this way, the shelves 21 can be selectively arranged on the clamping grooves 232 on two sides of the corresponding positions, so that the positions and the distances of the gaps 212 between the adjacent shelves 21 can be adjusted, and the difference of detection points on different workpieces 100 can be effectively matched.

In the present embodiment, as shown in fig. 9 and 10, a snap fitting 233 is provided at the extending end of the bead 231. Correspondingly, the buckling part on the shelf 21 for buckling the clamping groove 232 is provided with buckling angles 213 and buckling grooves 214, and after the buckling angles 213 are buckled into the clamping groove 232, the lower corners on two sides of the shelf 21 are placed on the periphery of the mounting groove 23, so that the positioning effect is improved. The fastening groove 214 is matched with the fastening joint 233 on the rib 231 in shape and fastened with each other, thereby improving the fixing effect. Wherein, the extended ends of the ribs 231 are provided with the buckling joints 233, so that a clamping groove 232 structure with narrow inlet and wide groove depth is formed between the adjacent ribs 231, which is beneficial to improving the clamping effect. As shown in fig. 9, the fastening piece 233 may be preferably a cylinder on the extending end of the rib 231, and the upper end thereof is preferably a spherical structure, so that the fastening portion of the shelf 21 is easy to be fastened into the fastening groove 232, thereby improving the installation efficiency.

For the structure of the fixing groove 211 on the shelf 21, in an embodiment of the present application, referring to fig. 5, the fixing groove 211 on the shelf 21 is a tapered groove gradually shrinking toward the deep part of the groove body, and the fixing grooves 211 on the respective shelves 21 are coaxially aligned. Accordingly, the tapered groove of the fixing groove 211 on the shelf is beneficial to fixing and positioning the workpiece 100, and effectively prevents products from rolling and shifting or falling, so that the fixing effect on the workpiece 100 is improved, the clamping structure is avoided, and damage to the workpiece 100 is prevented.

Wherein the fixing grooves 211 on the respective shelves 21 are disposed in coaxial alignment to define the placement posture of the workpiece 100. The rod-shaped workpiece 100 is arranged in parallel with the guide rail 11, and the irradiation lines existing in the measuring areas M of the workpiece 100 and the outer diameter measurer 4 are mutually perpendicular, so that the accuracy of the measuring result is effectively ensured.

For the structure on the movable seat 2, in another embodiment of the present application, referring to fig. 5, two ends of the movable seat 2 are respectively provided with a limiting plate 24 for abutting against the end of the workpiece 100, the limiting plate 24 is provided with a connecting arm 241 extending to two sides of the movable seat 2, and the connecting arm 241 is provided with a strip hole 242. On both sides of the movable seat 2, a sliding slot 25 for the connecting arm 241 to slide is provided, and a fixing bolt 251 is located in the sliding slot 25. The fixing bolt 251 passes through the elongated hole 242 of the connecting arm 241 and is used to lock the connecting arm 241. Therefore, the limiting plates 24 can be displaced on the movable seat 2 by the connecting arms 241, so that the distance between the limiting plates 24 on two ends of the movable seat 2 is adjusted, the lengths of different workpieces 100 are effectively adapted, and the adaptability to the workpieces 100 with different specifications is improved.

For the structure of the movable seat 2, as shown in fig. 11, the movable seat 2 may preferably be composed of an upper seat, a middle seat and a base, wherein the upper seat is used for installing a workpiece and setting related structures for fixing the workpiece, the middle seat is used as a connecting piece for installing the upper seat on the base, and the base is provided with a through groove for installing on a guide rail. Therefore, the upper seat of the movable seat 2 can be arranged according to workpieces with different specifications, so that different workpiece installation requirements can be adapted by changing different upper seats, and the adaptability of the movable seat 2 is improved.

For the structure of the first screw rod assembly 3, in the embodiment of the present application, please refer to fig. 11 and 12 together, the first screw rod assembly 3 includes a first screw rod 31, a first knob 32, and first bases 33 located at two ends of the first screw rod 31, wherein the first bases 33 are respectively provided with a first bearing 34, and the first screw rod 31 is connected to the first bearings 34 in a penetrating manner. The movable seat 2 is provided with a connecting lug 26, and the connecting lug 26 is provided with a screw hole for sleeving on the first screw rod 31. The first knob 32 is disposed at one end of the first screw rod 31, so that the first screw rod 31 is driven to rotate by a human hand, and the connecting lug 26 moves on the first screw rod 31, so as to drive the movable seat 2 to translate along the guide rail 11. Thus, the movable seat 2 is adjusted in position by adopting the screw rod structure, and the positioning accuracy of the detection point position when the detection point position of the workpiece 100 is changed is improved. The workpiece 100 can be changed from multiple detection points without repeated clamping and transferring operations, so that the personnel input cost is effectively reduced, and the operation efficiency is improved.

In an embodiment of the present application, referring to fig. 11, the outer diameter detection fixture further includes a ranging device 12 and a digital display 13 disposed on the base plate 1, where the ranging device 12 is electrically connected to the digital display 13. The movable seat 2 is provided with a reflecting plate 27, and the reflecting plate 27 is arranged opposite to the ranging transmitting end on the ranging device 12, so that ranging light emitted from the ranging transmitting end on the ranging device 12 can be irradiated onto the reflecting plate 27, and distance data are obtained. The distance measuring device 12 may be a conventional infrared distance measuring device, and the distance measuring transmitting end of the distance measuring device capable of emitting infrared rays is disposed opposite to the reflecting plate 27.

Therefore, the detection result generated on the distance measuring device 12 is displayed through the digital display 13, so that an operator can know the position information of the movable seat 2, and further, the movable seat 2 is better operated to translate to position the detection point of the workpiece 100, and the operation efficiency is effectively improved.

As for the structure of the height adjusting mechanism 5, in the embodiment of the present application, please refer to fig. 12, 13 and 14 together, the height adjusting mechanism 5 includes a second screw assembly 6 and a bracket 51 provided on the base plate 1. In the present embodiment, as shown in fig. 11, it is preferable that a support plate 511 is provided at the back of the support plate 51, one side of the support plate 511 is connected to the support plate 51, and the bottom side of the support plate 511 is connected to the base plate 1, thereby improving the structural strength of the support plate 51.

As shown in fig. 12 and 13, the second screw assembly 6 includes a connection plate 61, a second screw 62, a second knob 63, and second bases 64 respectively provided at upper and lower ends of the bracket 51, the connection plate 61 being connected to the outer diameter measuring instrument 4, and the connection plate 61 having a screw hole 611 in which the second screw 62 is sleeved. Second bases 64 at the upper and lower ends of the bracket 51 are respectively provided with a second bearing 641, and both ends of the second screw 62 are respectively connected to the second bearings 641 in a penetrating manner. The second knob 63 is disposed at the upper end of the second screw rod 62, so that the second screw rod 62 is driven to rotate by a human hand, and the connecting plate 61 moves on the second screw rod 62 and drives the outer diameter measurer 4 to move up and down, thereby adjusting the height position of the measuring region M on the outer diameter measurer 4 on the guide rail 11. Therefore, the screw rod structure is adopted for position adjustment, the accuracy of the height position of the adjustment measurement area M is improved, the difference of the detection points of the workpieces 100 with different specifications and the detection points on the workpieces 100 is effectively adapted, the workpieces 100 and the detection points on the workpieces can fall into the detection irradiation line range completely, and the adaptability of the jig is improved.

In this embodiment, referring to fig. 13 and 14, a slide rail 52 perpendicular to the bottom plate 1 is further provided on the bracket 51, a lining board 43 is mounted on the outer diameter measurer 4, a slide block 431 is provided on the lining board 43 and connected with the slide rail, a groove 432 is provided on the slide block 431, and the groove 432 is connected with the slide rail 52. The outside diameter measuring instrument 4 moves up and down along the slide rail 52 by the slider 431 on the lining plate 43. Accordingly, the connecting plate 61 can move along the slide rail 52 when driving the outer diameter measuring device 4 to move up and down, so that the verticality of the outer diameter measuring device 4 moving on the bottom plate 1 is effectively maintained, and the accuracy of up and down displacement is improved.

The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.

Claims

1. An external diameter detection tool for detect the external diameter of rod-like work piece, its characterized in that, external diameter detection tool includes:

the bottom plate is provided with a guide rail;

2. The outer diameter detection jig according to claim 1, wherein: the movable seat is provided with a plurality of shelves for positioning the workpiece, and each shelf is provided with a fixed groove for embedding the workpiece; the shelves are orderly arranged on the movable seat along the length direction of the guide rail, and gaps for measuring light irradiation are formed between the shelves at intervals.

3. The outer diameter detection jig according to claim 2, wherein: the movable seat is provided with a plurality of jacks for installing the shelf, and the jacks are orderly arranged on the movable seat along the length direction of the guide rail; the shelf is selectively plugged into the jack.

4. The outer diameter detection jig according to claim 2, wherein: the movable seat is provided with mounting grooves for embedding the plurality of shelves, the movable seat is provided with a plurality of convex ribs which are symmetrically arranged on the inner walls of the two opposite sides of the mounting grooves respectively, and adjacent convex ribs are arranged at intervals to form clamping grooves for selectively inserting the shelves.

5. The outer diameter detection jig according to claim 2, wherein: the fixing grooves on the shelves are conical grooves gradually shrinking towards the deep part of the groove body, and the fixing grooves on the shelves are coaxially aligned.

6. The outer diameter detection jig according to any one of claims 1 to 5, wherein: limiting plates for propping against the end parts of the workpieces are respectively arranged at the two ends of the movable seat, connecting arms extending towards the two sides of the movable seat are arranged on the limiting plates, and strip holes are formed in the connecting arms; the movable seat is characterized in that sliding grooves for embedding and sliding the connecting arms and fixing bolts located in the sliding grooves are formed in two sides of the movable seat, and the fixing bolts penetrate through strip holes of the connecting arms and are used for locking the connecting arms.

7. The outer diameter detection jig according to claim 1, wherein: the first screw rod assembly comprises a first screw rod, a first knob and first bases positioned at two ends of the first screw rod, first bearings are arranged on the first bases, and the first screw rod is connected to the first bearings in a penetrating mode; the movable seat is provided with a connecting lug which is sleeved on the first screw rod; the first knob is arranged at one end of the first screw rod.

8. The outer diameter detection jig according to claim 1, wherein: the outer diameter detection jig further comprises a distance measuring device and a digital display, wherein the distance measuring device and the digital display are arranged on the bottom plate, and the distance measuring device is electrically connected with the digital display; the movable seat is provided with a reflecting plate, and the reflecting plate is arranged opposite to a ranging transmitting end on the ranging device.

9. The outer diameter detection jig according to claim 1, wherein: the height adjusting mechanism comprises a second screw rod assembly and a bracket arranged on the bottom plate, the second screw rod assembly comprises a connecting plate, a second screw rod, a second knob and second bases respectively arranged at the upper end and the lower end of the bracket, the connecting plate is connected with the outer diameter measurer, and the connecting plate is provided with a screw hole sleeved with the second screw rod; the second bases are respectively provided with a second bearing, and two ends of the second screw rod are respectively connected to the second bearings in a penetrating way; the second knob is arranged at the upper end of the second screw rod.

10. The outer diameter detection jig according to claim 9, wherein: the support is provided with a sliding rail perpendicular to the bottom plate, the outer diameter measurer is provided with a lining plate, the lining plate is provided with a sliding block connected with the sliding rail in an installation mode, and the outer diameter measurer moves up and down along the sliding rail through the sliding block on the lining plate.