Gear inside and outside diameter detection device

Abstract

The utility model provides a gear inside and outside diameter detection device, including base, detection mould, detection subassembly and linear movement mechanism, and the detection mould is positioned to gear through the positioning structure of the card slot formed by the convex rib interval on its ring cloth, and detection subassembly is movably arranged on the base through linear movement mechanism, and can be horizontally moved to its directly above from behind upper side of detection mould, and detection subassembly includes positioning cover, telescopic mechanism and detection probe group, and the bottom end of positioning cover is equipped with the notch of avoiding wheel hub, and telescopic mechanism is used for driving the lifting of fixed base with probe, and detection probe group includes two symmetrical laser displacement sensor for measuring outside diameter and telescopic probe type inside diameter gauge for measuring inside diameter. The utility model realizes the automatic, on -line, fast detection of gear inside and outside diameter, and positioning is accurate, and the measuring efficiency is high, and is easy to integrate in the automatic production line.

Description

Technical Field

[0001] This utility model relates to the field of gear processing equipment technology, specifically to a gear inner and outer diameter detection device. Background Technology

[0002] In gear machining, the inner diameter and outer diameter of the gear blank are crucial reference dimensions, as their machining accuracy directly affects the positioning accuracy of subsequent gear machining and the quality of the final product. Currently, the industry generally relies on traditional manual measurement methods for inspecting these dimensions. Operators use measuring tools such as calipers, micrometers, or dial indicators to manually measure each machined workpiece offline. This traditional method is not only inefficient and labor-intensive, increasing labor costs, but also prone to inconsistencies, omissions, or distortions in measurement results due to operator fatigue, operational differences, or reading errors, making real-time data acquisition and traceability difficult. Furthermore, because the measurement is performed offline after machining, by the time dimensional deviations are discovered, multiple defective products have often already been produced, resulting in wasted materials and time, and hindering real-time monitoring and timely adjustments to the machining process.

[0003] To address these issues, enterprises urgently need a solution that can be integrated into production lines to achieve automated online inspection. However, existing automated monitoring equipment is often complex in structure, expensive, or requires significant modifications to existing production lines, lacking adaptability and flexibility, and difficult to deploy and apply quickly in small-batch, multi-variety production environments. Therefore, developing an automated inspection device that is compact, highly integrated, efficient in measurement, and can provide real-time data feedback to guide production is of great significance for improving the quality control level of gear processing, reducing production costs, and achieving flexible production. Utility Model Content

[0004] The purpose of this utility model is to provide a gear inner and outer diameter detection device, which has a compact structure and high detection efficiency, and can realize online, real-time and automatic measurement of the inner and outer diameter dimensions of gears or gear blanks.

[0005] To achieve the above objectives, the present invention proposes the following technical solution:

[0006] A gear inner and outer diameter testing device includes a testing mold and testing components;

[0007] The testing mold is provided with at least two sets of positioning structures for positioning and placing gears;

[0008] The detection component is movably disposed above the detection mold and includes a positioning cover, a detection probe group, and a telescopic mechanism;

[0009] The bottom of the positioning cover has an open structure;

[0010] The detection probe assembly is housed within the positioning cover via a telescopic mechanism and is used to detect the inner and outer diameters of the gear.

[0011] The telescopic mechanism is used to drive the detection probe group to extend vertically downwards.

[0012] As a preferred technical solution of this utility model, the telescopic mechanism includes a mounting base and a second drive cylinder;

[0013] The mounting base is an inverted L-shaped structure consisting of a horizontal plate and a vertical plate connected vertically. The bottom end of the vertical plate is connected to the top end of the positioning cover, and its top end is connected to the horizontal plate.

[0014] The second drive cylinder is located at the top of the horizontal plate, and its second piston rod extends through the horizontal plate into the interior of the positioning cover;

[0015] The detection probe assembly is mounted on the bottom end of the second piston rod via a mounting bracket.

[0016] As a preferred technical solution of this utility model, it also includes a linear movement mechanism;

[0017] The testing mold is mounted on a base;

[0018] The detection component is movably mounted on the base via the linear moving mechanism and is located above and behind the detection mold;

[0019] The linear movement mechanism is used to drive the detection component to move horizontally to directly above the detection mold.

[0020] As a preferred technical solution of this utility model, the linear moving mechanism includes a linear guide rail, a slider, and a first driving cylinder;

[0021] The linear guide rail is fixedly installed on the base;

[0022] The slider is slidably connected to the linear guide rail;

[0023] The top of the positioning cover is connected to the slider via the mounting base;

[0024] The first drive cylinder is mounted on the base, and its first piston rod is connected to the mounting base or the slider.

[0025] As a preferred technical solution of this utility model, each group of positioning structures is composed of at least two ribs spaced apart, and adjacent ribs of the same group of positioning structures form a groove for engaging gear teeth.

[0026] As a preferred embodiment of this utility model, the bottom edge of the positioning cover is provided with a pair of symmetrically arranged notches, which are used to avoid the hub of the gear when the detection component moves horizontally.

[0027] As a preferred technical solution of this utility model, the detection probe group includes an outer diameter detection probe and an inner diameter detection probe;

[0028] The outer diameter detection probe and the inner diameter detection probe are three-probe measuring devices, and both are mounted on the bottom end of the second piston rod via the fixing base.

[0029] As can be seen from the above technical solutions, the present invention provides a gear inner and outer diameter detection device, which has the following advantages compared with the prior art:

[0030] 1. Through the cooperation of linear movement mechanism and telescopic mechanism, the automatic positioning and measurement of the detection probe group is realized, which completely replaces the traditional manual hand-held measuring tool operation, greatly shortens the single-piece inspection time, and is especially suitable for online full inspection on the production line.

[0031] 2. The positioning structure consisting of ribs and slots is used to position the gear, which has high repeatability and effectively avoids measurement errors caused by manual placement deviations, thus ensuring the accuracy and consistency of the test data.

[0032] 3. The detection function module is integrated into a horizontally movable component. The overall structure is reasonable, the footprint is small, and it is easy to embed into existing automated processing production lines without the need for large-scale modifications.

[0033] It should be understood that all combinations of the foregoing concepts and the additional concepts described in more detail below can be considered as part of the utility model subject matter of this disclosure, provided that such concepts do not contradict each other.

[0034] The foregoing and other aspects, embodiments, and features of the present invention will be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as features and / or beneficial effects of exemplary embodiments, will become apparent from the following description or may be learned through practice of specific embodiments according to the teachings of the present invention. Attached Figure Description

[0035] The accompanying drawings are not drawn to scale according to a true reference numeral. In the drawings, each identical or nearly identical component shown in the various figures can be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein:

[0036] Figure 1This is a schematic diagram of the gear inner and outer diameter detection device of this utility model;

[0037] Figure 2 This is a schematic diagram of the gear inner and outer diameter detection probe of this utility model during measurement;

[0038] Figure 3 This is a side view of the detection mold structure of the gear inner and outer diameter detection device of this utility model;

[0039] Figure 4 This is a top view of the testing mold structure of the gear inner and outer diameter testing device of this utility model.

[0040] The meanings of the reference numerals in the figure are as follows:

[0041] 1. Inspection mold; 101. Positioning structure; 1011. Rib; 1012. Slot; 2. Gear; 3. Positioning cover; 301. Notch; 401. Inner diameter detection probe; 402. Outer diameter detection probe; 403. Fixing base; 5. Mounting base; 6. Second drive cylinder; 7. Second piston rod; 8. Fixing hole. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains.

[0043] The terms "first," "second," and similar words used in this utility model patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the features, integrals, steps, operations, elements, and / or components listed following "comprising" or "including," and do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] A gear inner and outer diameter testing device includes a base, a testing mold 1, a testing component, and a linear moving mechanism. The base is a rigid platform supporting the entire device. The testing mold 1 is bolted to the center of the working area of ​​the base. The testing component is movably positioned above the testing mold 1 via the linear moving mechanism, with its standby position located above and behind the testing mold 1, and its testing position located directly above the testing mold 1. During testing, the testing component is horizontally moved by the linear moving mechanism until it is directly above the testing mold 1.

[0045] The detection mold 1 is used to receive and position the gear 2 (e.g., gear 2) transported by the robotic arm. Figure 1 , Figure 2 (blue illustration in the image) or tooth blank, such as Figure 3 , Figure 4 As shown, in the detection mold 1 (for Figure 4 Around the green area (shown in the diagram), at least two sets of positioning structures 101 are evenly distributed. The testing mold 1 is installed on the base through fixing holes 8 using screws, bolts, etc.

[0046] In some embodiments of this utility model, each positioning structure 101 consists of multiple positioning grooves. Preferably, at least two positioning grooves are spaced apart to form a positioning structure. The positioning groove is formed by the indentation of the top edge of the detection mold 1. The width and depth of the positioning groove are adapted to the width and thickness of the teeth of the gear 2, so that when the gear 2 is placed on the detection mold, multiple teeth of the gear 2 are located in the positioning groove, thereby positioning the gear 2 on the detection mold 1.

[0047] In other embodiments of this utility model, such as Figure 1 , Figure 4 As shown, three sets of positioning structures 101 are arranged at 120° intervals around the edge of the testing mold 1. Each set of positioning structures 101 consists of at least two ribs 1011 spaced apart. The ribs 1011 are made of high-strength alloy steel. Adjacent ribs 1011 in the same set of positioning structures form a groove 1012. Preferably, at least two ribs 1011 are spaced apart to form two grooves. The ribs 1011 protrude from the top surface of the edge of the testing mold. The depth and width of the groove 1012 are adapted to the width and thickness of the teeth of the gear 2, so that when the gear 2 is placed on the testing mold 1, multiple teeth of the gear 2 naturally fall into the groove 1012, thereby achieving fast and accurate circumferential and radial positioning.

[0048] The detection components include a positioning cover 3, a detection probe group, and a telescopic mechanism.

[0049] like Figure 1As shown, the positioning cover 3 is movably positioned above the detection mold 1 via a linear moving mechanism. Its bottom end has an open structure, which can cover the top of the detection mold 1 to form accurate positioning. A pair of symmetrically arranged rectangular notches 301 are provided in the middle of the bottom end. The depth of the notches 301 is adapted to the height of the hub located at the center of the gear 2, and the width of the notches 301 is adapted to the outer diameter of the hub of the gear 2. This is used to avoid the hub of the gear 2 when the positioning cover 3 moves horizontally, ensuring that the positioning cover 3 will not interfere with the gear 2 during horizontal movement.

[0050] During measurement, the positioning cover 3 moves horizontally from the rear upper part of the detection mold 1 to the direct upper part of the detection mold 1 via a linear moving mechanism. During the movement, the bottom edge of the positioning cover 3 does not contact the wheel surface of the gear 2, and a gap of 0.5-1.5cm is reserved between them. The notch 301 serves as a channel for the hub to pass through, so that the positioning cover 3 can completely cover the gear 2.

[0051] like Figure 2 As shown, the detection probe assembly includes an inner diameter detection probe 401 and an outer diameter detection probe 402. The inner diameter detection probe 401 and the outer diameter detection probe 402 are mounted inside the positioning cover 3 via a telescopic mechanism. When the positioning cover 3 moves directly above the detection mold 1, they extend downwards to detect the inner and outer diameters of the gear 2 hub, respectively. Therefore, the positioning cover 3 not only serves a positioning function but also protects the detection probe assembly.

[0052] In some specific embodiments of this utility model, both the inner diameter detection probe 401 and the outer diameter detection probe 402 employ a three-probe measuring device. This device is based on the principle of three-point circle determination, calculating the diameter of the inner hole or outer circle of the gear 2 hub through the radial displacement of the three probes. Each probe has a contact head, such as a tungsten carbide probe, at its end. When the probe moves radially and contacts the inner diameter or outer circle surface of the gear 2 hub, the displacement sensor monitors the extension of each probe in real time, and calculates the actual diameter value through a controller such as a PLC or embedded system.

[0053] The three-probe measuring device includes a fixed base 403, three measuring probes, three displacement sensors (such as LVDT or grating size sensors), and a miniature drive mechanism such as a drive motor or cylinder. The three measuring probes are distributed at equal angles of 120° on the same circumference and are mounted on the fixed base 403 via hinged or sliding structures, and can move synchronously or independently in the radial direction. The fixed base 403 is mounted inside the positioning cover 3 via a telescopic mechanism and can rise and fall with it. The initial position of the three measuring probes is in a retracted state to facilitate entry into the inner hole or outer circumference area of ​​the gear 2 hub.

[0054] In this invention, the three-probe measuring device is only applied and no improvement is involved. Such three-probe measuring devices have been widely used in the field of precision mechanical measurement, such as the internal diameter measuring instrument of MARPOS in Germany. Its structure usually includes: a central drive mechanism, three radially distributed measuring arms, a high-precision displacement sensor, and automatic calibration and temperature compensation functions. The three-probe measuring device in this invention can draw on such mature structures and integrate them into an automated detection system to achieve online measurement without manual intervention.

[0055] The linear moving mechanism is used to move the entire detection assembly toward or away from the fixed gear 2. Specifically, it is used to push the detection assembly horizontally from the rear upper part of the detection mold 1 until it is directly above the detection mold 1; or to move it in the opposite direction away from the detection mold 1.

[0056] In some specific embodiments of this utility model, the linear movement mechanism includes a linear guide rail, a slider, and a first drive cylinder. The linear guide rail is fixedly mounted on a base, and the slider is slidably connected to the linear guide rail. The first drive cylinder is mounted on the base via mounting components, and its first piston rod is connected to the slider. A mounting base 5 is provided at the top of the positioning cover 3. This mounting base 5 is an inverted L-shaped structure formed by a horizontal plate and a vertical plate vertically connected. The bottom end of the vertical plate is connected to the top end of the positioning cover 3, and the horizontal plate is connected to the top end of the vertical plate. The positioning cover 3 is movably connected to the linear guide rail through the connection between the slider and the vertical plate. In embodiments where the vertical plate area is large, the first piston rod can also be directly connected to the vertical plate.

[0057] In some specific embodiments of this utility model, the telescopic mechanism includes a mounting base 5 and a second drive cylinder 6, with the second drive cylinder 6 serving as the driving source. The second drive cylinder 6 is located at the top of the horizontal plate, and its second piston rod 7 extends through the horizontal plate into the interior of the positioning cover 3. The detection probe assembly is mounted on the bottom end of the second piston rod 7 via a fixing base 403. When the second drive cylinder 6 receives a measurement command, it pushes the fixing base 403 and all the detection probe assemblies on it to move downwards together, measuring the outer diameter and inner diameter of the hub of the gear 2, respectively.

[0058] The testing device also includes a signal processing and display unit, comprising a controller (such as a PLC) and a local touchscreen. Analog or digital signals collected by all testing probes are transmitted via cables to the controller for processing and calculation, resulting in a real-time diameter value. The calculation results are transmitted to a host computer (such as the EasySPC software system) via a data interface (such as RS485 or Ethernet), and simultaneously displayed in real-time on the local touchscreen as "inner diameter value," "outer diameter value," and "pass / fail" judgment results.

[0059] During operation, the robotic arm positions gear 2 in the slot 1012 of the inspection mold 1. The first drive cylinder actuates, pushing the inspection component forward along the linear guide rail, precisely positioning the positioning cover 3 above gear 2, at which point the hub of gear 2 is aligned with the notch. Subsequently, the second drive cylinder 6 actuates, lowering the fixed base 403 and all inspection probes, allowing the three-probe device to enter the inner or outer diameter area of ​​gear 2. The drive mechanism pushes the three probes synchronously radially outward (when measuring the inner diameter) or inward (when measuring the outer diameter) until they contact the gear surface. The displacement sensors of each probe collect displacement data in real time and transmit it to the controller. The controller calculates the actual diameter based on the three-point coordinates and compares it with the preset tolerance range, outputting the measurement result. After measurement, the probes retract, the inspection component returns to the standby position, and the robotic arm removes gear 2, completing one inspection cycle.

[0060] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A gear inside and outside diameter detecting device characterized by comprising: Including testing molds and testing components; The testing mold (1) is provided with at least two sets of positioning structures (101) for positioning and placing gears (2). The detection component is movably disposed above the detection mold (1) and includes a positioning cover (3), a detection probe group and a telescopic mechanism; The bottom of the positioning cover (3) has an open structure; The detection probe group is set inside the positioning cover (3) through a telescopic mechanism and is used to detect the inner and outer diameters of the gear (2); The telescopic mechanism is used to drive the detection probe group to extend vertically downwards.

2. The gear inside / outside diameter measuring device according to claim 1, characterized by The telescopic mechanism includes a mounting base (5) and a second drive cylinder (6); The mounting base (5) is an inverted L-shaped structure consisting of a horizontal plate and a vertical plate connected vertically. The bottom end of the vertical plate is connected to the top end of the positioning cover (3), and its top end is connected to the horizontal plate. The second drive cylinder (6) is located at the top of the horizontal plate, and its second piston rod (7) extends through the horizontal plate into the interior of the positioning cover (3); The detection probe assembly is mounted on the bottom end of the second piston rod (7) via a mounting base (403).

3. The gear inside / outside diameter measuring device according to claim 2, wherein It also includes linear movement mechanisms; The testing mold (1) is mounted on a base; The detection component is movably mounted on the base via the linear moving mechanism and is located above and behind the detection mold (1); The linear movement mechanism is used to drive the detection component to move horizontally to directly above the detection mold (1).

4. The gear inside / outside diameter measuring device according to claim 3, wherein The linear movement mechanism includes a linear guide rail, a slider, and a first drive cylinder; The linear guide rail is fixedly installed on the base; The slider is slidably connected to the linear guide rail; The top of the positioning cover (3) is connected to the slider via the mounting base (5); The first drive cylinder is mounted on the base, and its first piston rod is connected to the mounting base (5) or the slider.

5. The gear inside and outside diameter measuring apparatus according to claim 1, wherein Each group of positioning structures (101) is formed by at least two ribs (1011) spaced apart, and a slot (1012) for engaging the teeth of the gear (2) is formed between adjacent ribs (1011) of the same group of positioning structures (101).

6. The gear inside / outside diameter measuring device according to claim 3, wherein The bottom edge of the positioning cover (3) is provided with a pair of symmetrically arranged notches (301), which are used to avoid the hub of the gear (2) when the detection component moves horizontally.

7. The gear inside and outside diameter measuring apparatus according to claim 2, wherein The detection probe group includes an outer diameter detection probe (402) and an inner diameter detection probe (401). The outer diameter detection probe (402) and the inner diameter detection probe (401) are three-probe measuring devices, which are mounted on the bottom end of the second piston rod via the fixing seat.

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