An on-line outside diameter measuring device

Abstract

This utility model relates to an online outer diameter measuring device, including a detection mounting base and an outer diameter measuring pen. Two material support frames are fixedly mounted on the detection mounting base, arranged along the length of the base, and each frame has a bearing groove adapted to the workpiece shape. A first guide rail is fixed on the detection mounting base between the two material support frames, and a second guide rail is slidably mounted on the first guide rail via a first slider. This utility model utilizes the V-shaped bearing grooves on the material support frames to adapt to the workpiece shape, combined with an anti-slip and wear-resistant pad adhered to the groove walls. Through the V-shaped positioning principle, the workpiece is stably supported. The anti-slip and wear-resistant pad increases the friction between the workpiece and the pad, effectively suppressing workpiece offset or tilting caused by placement deviation or rolling, ensuring that the workpiece axis remains consistent with the detection reference, and fundamentally reducing errors caused by detection position deviation.

Description

Technical Field

[0001] This utility model relates to the field of mechanical workpiece inspection technology, specifically to an online outer diameter measuring device. Background Technology

[0002] In automated production lines for machining, the outer diameter of workpieces needs to be monitored in real time to quickly screen out defective products and ensure production efficiency and product quality. Existing outer diameter measuring devices are prone to displacement or tilting when the workpiece is placed at the inspection station due to factors such as gripper placement deviation or workpiece rolling. This causes the outer diameter measuring pen to deviate from the workpiece axis, resulting in inspection errors and affecting the accuracy of the judgment. Furthermore, the loading, inspection, and unloading actions of existing devices are not smoothly coordinated and cannot keep pace with the high speed of the production line. Utility Model Content

[0003] The purpose of this invention is to provide an online outer diameter measuring device that effectively solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution.

[0005] An online outer diameter measuring device includes a detection mounting base and an outer diameter probe. Two support frames are fixedly mounted on the detection mounting base, arranged along the length of the base, and each support frame has a bearing groove adapted to the shape of the workpiece. A first guide rail is fixed on the detection mounting base between the two support frames, and a second guide rail is slidably mounted on the first guide rail via a first slider. A mounting plate is fixed on one side of the first guide rail on the detection mounting base, and a second guide rail is fixed on the mounting plate. A second measuring bracket is slidably mounted on the second guide rail via a second slider. A mounting seat is fixed on the mounting plate, and the outer diameter probe is fixedly clamped on the mounting seat, with a spherical probe engaging with the second measuring bracket. A linkage mechanism is provided within the mounting plate for synchronously moving the first and second measuring brackets in opposite directions.

[0006] Furthermore, the second slider and the mounting base are elastically connected by an elastic module; the elastic module is used to push the second slider back to slide and reset towards the first measuring bracket side.

[0007] Furthermore, the elastic module includes a guide rod and a spring; the side surface of the mounting base is provided with a horizontally extending mounting hole; one end of the guide rod is fixed to the side of the second slider, and the other end is slidably inserted into the mounting hole; the spring is horizontally arranged in the mounting hole, with one end fixed to the end of the guide rod and the other end fixed to the end wall inside the mounting hole.

[0008] Furthermore, the first slider is slidably mounted on the first guide rail, and the first measuring bracket is fixed on the first slider; the second slider is slidably mounted on the second guide rail, and the second measuring bracket is fixed on the second slider; both the first slider and the second slider are ball linear sliders.

[0009] Furthermore, the linkage mechanism includes a gear, a rack, a first connecting rod, and a second connecting rod; the mounting plate has an inner cavity, and the upper surface of the mounting plate has a guide groove communicating with the inner cavity, and the side end of the mounting plate has a guide hole communicating with the inner cavity; the gear is rotatably mounted in the inner cavity via a shaft, and racks are slidably mounted on both sides of the gear in the inner cavity, with the two racks meshing with the sides of the gear respectively; one end of the first connecting rod is fixed to the end of one rack, and the other end passes through the guide hole and is fixed to the first slider; one end of the second connecting rod is fixed above the rack on the other side, and the other end passes through the guide groove and is fixed to the lower surface of the second slider.

[0010] Furthermore, the bearing groove is a V-shaped groove, and its groove wall is covered with an anti-slip and wear-resistant pad layer.

[0011] Furthermore, a limit block is installed on one side of the first guide rail on the testing mounting base, and the limit block cooperates with the first slider to block.

[0012] Furthermore, the limiting block has an L-shaped structure, with one side parallel to the length direction of the detection mounting base to limit the sliding stroke of the first slider along the first guide rail, and the other side parallel to the width direction of the detection mounting base to limit the offset of the first slider in the length direction of the detection mounting base.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0014] The support groove on the material rack is a V-shaped groove adapted to the shape of the workpiece. With the anti-slip and wear-resistant pad layer pasted on the groove wall, it can form a stable support for the workpiece through the V-shaped positioning principle. The anti-slip and wear-resistant pad layer can increase the friction between the workpiece and the workpiece, effectively suppressing the offset and tilt caused by the workpiece due to placement deviation or its own rolling, ensuring that the workpiece axis is consistent with the detection benchmark, and reducing the error caused by the deviation of the detection position from the root.

[0015] Through the meshing transmission of gears and racks on both sides, and the connection of the first and second connecting rods to the first and second sliders respectively, the first and second measuring brackets can move synchronously in opposite directions. This ensures that the relative positions of the contact points between the two and the workpiece always correspond to the workpiece axis, avoiding the offset of the detection point caused by asynchronous movement on one side, and significantly improving the synchronization and accuracy of outer diameter measurement.

[0016] The elastic module between the second slider and the mounting base, through the sliding of the guide rod in the mounting hole and the elastic extension and contraction of the spring, can drive the second slider and the second measuring bracket to reset after the workpiece is removed. Combined with the linkage mechanism, it can synchronously drive the first slider and the first measuring bracket to return to their original positions, ensuring that the first and second measuring brackets are in the preset initial positions before each inspection, improving the continuity of loading, inspection and unloading actions, and adapting to the high-speed rhythm of the production line. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model; Figure 2 A three-dimensional schematic diagram of a partial structure on the mounting base for inspection; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 5 This is a schematic diagram of the elastic module structure in this utility model; Figure 6 This is a schematic diagram of the surface structure of the mounting plate in this utility model; Figure 7 This is a schematic diagram of the linkage mechanism in this utility model.

[0018] In the diagram: 1. Testing mounting base; 2. Material support frame; 21. Bearing groove; 22. Anti-slip and wear-resistant pad; 3. First guide rail; 31. First slider; 32. First measuring bracket; 4. Mounting plate; 41. Inner cavity; 42. Guide hole; 43. Guide groove; 5. Second guide rail; 51. Second slider; 52. Second measuring bracket; 53. Mounting seat; 6. Outer diameter side pen; 7. Elastic module; 71. Mounting hole; 72. Guide rod; 73. Spring; 8. Linkage mechanism; 81. Gear; 82. Rack; 83. First connecting rod; 84. Second connecting rod; 9. Limit block. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0021] In this embodiment of the invention, 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 indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Example 1

[0022] Please see Figures 1-7 This utility model provides an online outer diameter measuring device, including a detection mounting base 1 and an outer diameter measuring pen 6. The outer diameter measuring pen 6 adopts a contact displacement sensor in the prior art, including a probe, a sensor body and a signal output line. The probe is spherical or conical and made of hard alloy to ensure sufficient surface hardness. The signal output line transmits the displacement signal of the probe to an external control system to realize real-time detection and qualification judgment of the outer diameter, so as to meet the automation requirements of online detection.

[0023] The testing and mounting base 1 is equipped with two material support frames 2, which are fixed on it. The two material support frames 2 are arranged along the length of the testing and mounting base 1, and each of the two material support frames 2 is provided with a bearing groove 21 that is adapted to the shape of the workpiece. When the workpiece is loaded for testing, the two ends of the workpiece are placed in the bearing groove 21 on the two material support frames 2 by using the mechanical arm. The bearing groove 21 is adapted to the shape of the two ends of the workpiece, so that the workpiece can be stably supported.

[0024] A first guide rail 3 is fixed on the mounting base 1 between the two material support frames 2. A second guide rail 5 is slidably mounted on the first guide rail 3 via a first slider 31. Specifically, the first slider 31 is slidably mounted on the first guide rail 3, and the first measuring bracket 32 ​​is fixed on the first slider 31.

[0025] A mounting plate 4 is fixed on one side of the first guide rail 3 on the mounting base 1. A second guide rail 5 is fixed on the mounting plate 4. A second measuring bracket 52 is slidably mounted on the second guide rail 5 via a second slider 51. Specifically, the second slider 51 is slidably mounted on the second guide rail 5, and the second measuring bracket 52 is fixed on the second slider 51.

[0026] In addition, a mounting base 53 is fixed on the mounting plate 4, and the outer diameter side pen 6 is fixedly clamped on the mounting base 53, and the probe is in contact with the second measuring bracket 52.

[0027] During the process of the workpiece falling into the bearing groove 21, the workpiece contacts the first measuring bracket 32 ​​and the second measuring bracket 52, and pushes the first measuring bracket 32 ​​and the second measuring bracket 52 away from each other. The probe of the outer diameter side pen 6 gradually contacts the outer wall of the second measuring bracket 52, and the probe gradually moves under pressure. The displacement change of the probe is converted into an electrical signal by the sensor and transmitted to the control system for data analysis and processing. If the displacement value corresponds to the outer diameter within the tolerance range, it is judged to be qualified and the workpiece enters the subsequent processing steps. If it exceeds the tolerance, an alarm is triggered and the workpiece enters the sorting process. Example 2

[0028] Please see Figure 6 and Figure 7 The difference between this embodiment and Embodiment 1 is that: The mounting plate 4 has an inner cavity 41, and a linkage mechanism 8 is provided in the inner cavity 41 for linkage between the first measuring bracket 32 ​​and the second measuring bracket 52 to move synchronously in opposite directions.

[0029] Specifically, the linkage mechanism 8 includes a gear 81, a rack 82, a first connecting rod 83, and a second connecting rod 84. The upper surface of the mounting plate 4 has a guide groove 43 communicating with the inner cavity 41, and the side end of the mounting plate 4 has a guide hole 42 communicating with the inner cavity 41. The gear 81 is rotatably mounted in the inner cavity 41 via a shaft. Racks 82 are slidably mounted on both sides of the gear 81 in the inner cavity 41, and the two racks 82 mesh with the two sides of the gear 81 respectively. One end of the first connecting rod 83 is fixed to the end of one of the racks 82, and the other end passes through the guide hole 42 and is fixed to the first slider 31. One end of the second connecting rod 84 is fixed above the rack 82 on the other side, and the other end passes through the guide groove 43 and is fixed to the lower surface of the second slider 51.

[0030] When the workpiece is placed in the bearing groove 21 and comes into contact with the first measuring bracket 32 ​​and the second measuring bracket 52, the workpiece exerts a thrust on the first measuring bracket 32. Since the first measuring bracket 32 ​​is fixed on the first slider 31, the thrust causes the first slider 31 to slide along the first guide rail 3. The sliding of the first slider 31 is transmitted to the rack 82 fixed to it through the first connecting rod 83, causing the rack 82 to slide in the limiting direction in the inner cavity 41. Since the two racks 82 are respectively meshed with the two sides of the gear 81, the sliding of one rack 82 will drive the gear 81 to rotate around the shaft in the inner cavity 41. The rotation of the gear 81 will then drive the other rack 82 to slide in the opposite direction. The sliding of the other rack 82 is transmitted to the second slider 51 through the second connecting rod 84. Since the second measuring bracket 52 is fixed on the second slider 51, the first measuring bracket 32 ​​and the second measuring bracket 52 finally achieve synchronous reverse movement under the action of the workpiece.

[0031] This linkage mechanism ensures that the displacement of the first measuring bracket 32 ​​and the second measuring bracket 52 always corresponds when they are in contact with the workpiece, ensuring that the probe of the outer diameter side pen 6 can accurately capture the displacement change of the second measuring bracket 52. Combined with the process of the outer diameter side pen 6 converting the displacement signal into an electrical signal and transmitting it to the control system, the synchronization and accuracy of the outer diameter measurement are further improved, and the detection deviation caused by the asynchronous movement of the two is reduced. Example 3

[0032] Please see Figure 2 and Figure 5 The difference between this embodiment and Embodiment 3 is as follows: The second slider 51 and the mounting base 53 are elastically connected by the elastic module 7.

[0033] Specifically, the elastic module 7 includes a guide rod 72 and a spring 73. The side surface of the mounting base 53 is provided with a horizontally extending mounting hole 71. One end of the guide rod 72 is fixed to the side of the second slider 51, and the other end is slidably inserted into the mounting hole 71. The spring 73 is horizontally arranged in the mounting hole 71, with one end fixed to the end of the guide rod 72 and the other end fixed to the inner end wall of the mounting hole 71.

[0034] The core function of the elastic module 7 is to drive the second slider 51 and the second measuring bracket 52 to reset towards the first measuring bracket 32 ​​after the workpiece inspection is completed and it is removed. The specific working principle is as follows: When the workpiece is placed in the bearing groove 21 and comes into contact with the first measuring bracket 32 ​​and the second measuring bracket 52, the first measuring bracket 32 ​​and the second measuring bracket 52 move synchronously in opposite directions. At this time, the second slider 51 slides away from the first measuring bracket 32 ​​along with the second measuring bracket 52. Since one end of the guide rod 72 is fixed to the second slider 51 and the other end is slidably inserted into the mounting hole 71 of the mounting base 53, the sliding of the second slider 51 will drive the guide rod 72 to move synchronously in the mounting hole 71, thereby compressing the spring 73 located in the mounting hole 71, so that the spring 73 stores elastic potential energy. After the workpiece inspection is completed and the workpiece is removed, the external force on the first measuring bracket 32 ​​and the second measuring bracket 52 disappears, the spring 73 releases its stored elastic potential energy, and pushes the guide rod 72 back to its original position in the mounting hole 71. The resetting of the guide rod 72 causes the second slider 51 to slide closer to the first measuring bracket 32. In conjunction with the linkage structure of Embodiment 2, the sliding of the second slider 51 is transmitted to the corresponding rack 82 through the second connecting rod 84, driving the gear 81 to rotate in the opposite direction. This, in turn, drives the first slider 31 and the first measuring bracket 32 ​​to reset through the rack 82 on the other side and the first connecting rod 83, restoring the first measuring bracket 32 ​​and the second measuring bracket 52 to their initial relative positions, preparing them for the next workpiece inspection.

[0035] This elastic reset mechanism ensures that the first measuring bracket 32 ​​and the second measuring bracket 52 can accurately return to their original positions after each test, avoiding the impact of positional deviation on the accuracy of subsequent tests. At the same time, it improves the continuity of loading, testing, and unloading actions, adapting to the high-speed rhythm of the production line. Example 4

[0036] Please see Figure 4 The difference between this embodiment and Embodiment 3 is as follows: A limiting block 9 is installed on one side of the first guide rail 3 on the detection mounting base 1. The limiting block 9 cooperates with the first slider 31. The limiting block 9 has an L-shaped structure. One side of it is parallel to the length direction of the detection mounting base 1 and is used to limit the sliding stroke of the first slider 31 along the first guide rail 3. The other side is parallel to the width direction of the detection mounting base 1 and is used to limit the offset of the first slider 31 in the length direction of the detection mounting base 1.

[0037] On the one hand, the side of the limiting block 9 that is parallel to the length direction of the detection mounting base 1 directly acts on the sliding path of the first slider 31 along the first guide rail 3. When the workpiece pushes the first measuring bracket 32 ​​to make the first slider 31 slide along the first guide rail 3, this side will block the first slider 31 from moving excessively and strictly limit its sliding stroke. This limitation ensures that the sliding range of the first slider 31 is always within the preset detection range, and avoids the first measuring bracket 32 ​​from colliding with the material support 2 or mounting plate 4 due to excessive sliding. At the same time, it ensures that the relative position of the first measuring bracket 32 ​​and the second measuring bracket 52 always matches the workpiece detection requirements, and prevents the detection point from deviating from the effective detection area of ​​the workpiece due to excessive stroke. On the other hand, the side of the limiting block 9 that is parallel to the width direction of the detection mounting base 1 constrains the offset of the first slider 31, ensuring that the first slider 31 is stable along the straight sliding trajectory of the first guide rail 3, and preventing the first measuring bracket 32 ​​from deviating from the workpiece axis due to offset, thereby ensuring the accuracy of the contact point between the first measuring bracket 32 ​​and the workpiece.

[0038] Specifically, the limiting block 9 is fixed to the detection mounting base 1 by countersunk bolts. A buffer pad is provided on the contact surface between the limiting block 9 and the first slider 31. The buffer pad is made of polyurethane material with a thickness of 2-3.5mm. When the first slider 31 slides to contact the limiting block 9, the buffer pad can absorb the impact energy, reduce vibration, prevent the material support frame from sliding excessively due to inertia, and avoid wear caused by direct metal collision, thus extending the service life of the device.

[0039] Secondly, a certain distance is reserved between the installation position of the limit block 9 and the initial position of the first slider 31 to ensure that the material support has enough sliding space to accommodate the fine-tuning of the position when the workpiece is placed.

[0040] The constraint of the limiting block 9 on the first slider 31 ensures the linkage accuracy between the first slider 31 and the second slider 51, so that the second measuring bracket 52 and the first measuring bracket 32 ​​always maintain a preset relative position relationship. This ensures that the spherical probe of the outer diameter side pen 6 can stably contact the second measuring bracket 52, reducing the detection point deviation caused by the offset or overtravel of the first slider 31, and improving the accuracy and stability of the outer diameter measurement. Example 5

[0041] This embodiment proposes a preferred solution in which both the first slider 31 and the second slider 51 are ball linear sliders. The ball linear sliders have a circulating ball structure inside, so that the coefficient of friction when the first slider 31 slides along the first guide rail 3 and the second slider 51 slides along the second guide rail 5 is less than 0.01. Example 6

[0042] This embodiment proposes a preferred solution where the bearing groove 21 is a V-shaped groove with a V-angle of 90°-120° to accommodate workpieces of various sizes. In addition, an anti-slip and wear-resistant pad 22 is attached to the groove wall of the V-shaped groove, and the thickness of the anti-slip and wear-resistant pad 22 is 2mm to prevent scratches on the workpiece and increase the friction between the workpiece and the pad.

[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An online outer diameter measuring device, comprising a detection mounting base (1) and an outer diameter measuring pen (6), characterized in that: The detection mounting base (1) is fixed with two material support frames (2), which are arranged along the length of the detection mounting base (1), and each of the two material support frames (2) is provided with a bearing groove (21) adapted to the shape of the workpiece. The detection mounting base (1) is fixed with a first guide rail (3) located between two material support frames (2), and a second guide rail (5) is slidably mounted on the first guide rail (3) via a first slider (31). The detection mounting base (1) is fixed with a mounting plate (4) on one side of the first guide rail (3), and a second guide rail (5) is fixed on the mounting plate (4). A second measuring bracket (52) is slidably mounted on the second guide rail (5) via a second slider (51). A mounting base (53) is fixed on the mounting plate (4), and the outer diameter side pen (6) is fixedly clamped on the mounting base (53), and the spherical probe abuts against the second measuring bracket (52); The mounting plate (4) is equipped with a linkage mechanism (8) for linking the first measuring bracket (32) and the second measuring bracket (52) to move synchronously in opposite directions.

2. The online outer diameter measuring device according to claim 1, characterized in that: The second slider (51) and the mounting base (53) are elastically connected by an elastic module (7); The elastic module (7) is used to push the second slider (51) back to slide and reset towards the side of the first measuring bracket (32).

3. The online outer diameter measuring device according to claim 2, characterized in that: The elastic module (7) includes a guide rod (72) and a spring (73); The mounting base (53) has a horizontally extending mounting hole (71) on its side surface; One end of the guide rod (72) is fixed to the side of the second slider (51), and the other end is slidably inserted into the mounting hole (71); The spring (73) is horizontally arranged in the mounting hole (71), with one end fixed to the end of the guide rod (72) and the other end fixed to the inner end wall of the mounting hole (71).

4. The online outer diameter measuring device according to claim 1, characterized in that: The first slider (31) is slidably mounted on the first guide rail (3), and the first measuring bracket (32) is fixed on the first slider (31); The second slider (51) is slidably mounted on the second guide rail (5), and the second measuring bracket (52) is fixed on the second slider (51); Both the first slider (31) and the second slider (51) are ball linear sliders.

5. The online outer diameter measuring device according to claim 1, characterized in that: The linkage mechanism (8) includes a gear (81), a rack (82), a first connecting rod (83), and a second connecting rod (84). The mounting plate (4) has an inner cavity (41), the upper surface of the mounting plate (4) has a guide groove (43) communicating with the inner cavity (41), and the side end of the mounting plate (4) has a guide hole (42) communicating with the inner cavity (41). The gear (81) is rotatably mounted in the inner cavity (41) via a shaft. The racks (82) are slidably mounted on both sides of the gear (81) in the inner cavity (41), and the two racks (82) mesh with the two sides of the gear (81) respectively. One end of the first connecting rod (83) is fixed to the end of one side of the rack (82), and the other end passes through the guide hole (42) and is fixed to the first slider (31); One end of the second connecting rod (84) is fixed above the rack (82) on the other side, and the other end passes through the guide groove (43) and is fixed to the lower surface of the second slider (51).

6. The online outer diameter measuring device according to claim 1, characterized in that: The bearing groove (21) is a V-shaped groove, and its groove wall is covered with an anti-slip and wear-resistant pad (22).

7. The online outer diameter measuring device according to claim 1, characterized in that: A limiting block (9) is installed on one side of the first guide rail (3) on the detection mounting base (1), and the limiting block (9) cooperates with the first slider (31) to block.

8. The online outer diameter measuring device according to claim 7, characterized in that: The limiting block (9) has an L-shaped structure. One side is parallel to the length direction of the detection mounting base (1) and is used to limit the sliding stroke of the first slider (31) along the first guide rail (3). The other side is parallel to the width direction of the detection mounting base (1) and is used to limit the offset of the first slider (31) in the length direction of the detection mounting base (1).

Images