Engine bearing cap bore on-line measuring device

Abstract

The utility model relates to motor shell detection technical field, and specifically is a kind of engine bearing cover aperture on-line measuring device, including measuring table, its characterized in that, the measuring table includes support and the tooling female board fixed on the support, at least one set of locating pin is fixed on the tooling female board, and laser sensor is installed between each set of locating pin.This detection device compact structure, adapt to detect multiple products, and automatic detection improves efficiency.The device adapts to automatic operation, and is newly added in original production line, only needs to increase truss fixed-point workpiece taking and placing action, and the transformation is simple.Signal only needs to detect workpiece in place and send unqualified telecommunication signal after detection, and two kinds of signal output to general control.

Description

Technical Field

[0001] This utility model relates to the field of aperture detection technology, specifically an online measuring device for the aperture of an engine bearing cover. Background Technology

[0002] The engine bearing cap has a semi-circular hole. To ensure a proper fit when the bearing cap is fitted to the bearing, the diameter of the hole in the bearing cap needs to be measured. Currently, the common measurement method is to use a micrometer. However, this method requires high consistency in measurement from the operator, is relatively slow, and has low efficiency.

[0003] A coordinate measuring machine (CMM) uses a precision probe to collect the coordinates of points on the surface of a workpiece's inner hole in three-dimensional space, either through contact or non-contact methods. Software then calculates all relevant geometric tolerances, such as hole diameter, roundness, cylindricity, and position. However, CMMs are expensive, require specialized operators and programmers, and have stringent environmental requirements. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to design an online measuring device for the bore diameter of an engine bearing cover. This device, by setting up a pressure test and timing device, facilitates the monitoring of inflation time and changes in internal pressure of the motor housing.

[0005] To solve the above-mentioned technical problems, the online measuring device for the bore diameter of the engine bearing cover of this utility model includes a measuring table. The measuring table includes a bracket and a tooling mother plate fixed on the bracket. At least one set of positioning pins is fixed on the tooling mother plate, and a laser sensor is installed between each set of positioning pins.

[0006] Preferably, the tooling mother plate has multiple elongated holes, each of which is located between each set of positioning pins, and the laser sensor is located below the elongated holes.

[0007] Preferably, the laser sensor is fixedly connected to the tooling mother plate via a positioning block.

[0008] Preferably, a sensing sensor is fixed on the tooling mother plate.

[0009] Preferably, the bracket includes a base plate, a support column is fixed on the base plate, a reinforcing plate is fixed on the support column, and the reinforcing plate is fixedly connected to the base plate.

[0010] Preferably, the positioning block is fixed to the lower surface of the tooling mother plate by bolts. Preferably, the laser sensor is connected in series with the first delay contact and then connected to the main circuit power supply. The main circuit power supply is also connected to an intermediate relay. The intermediate relay is connected to the laser sensor through a second delay contact. The first delay contact is the delay contact of the first time relay, and the second delay contact is the delay contact of the second time relay. The first time relay and the second time relay are connected in parallel and then connected to the main circuit power supply. The first time relay and the second time relay are electrically connected to the sensing sensor, and the sensing sensor is connected to the main circuit power supply.

[0011] Preferably, the intermediate relay is also electrically connected to a second control contact, which is connected in series with a buzzer and then connected to the main circuit power supply.

[0012] In summary, the beneficial effects of this utility model are as follows: ① This testing device has a compact structure, is suitable for testing multiple products at once, and improves efficiency through automatic testing. The device is designed for automated operation; when added to an existing production line, only the gantry-based workpiece placement and removal mechanism needs to be added, making the modification simple. The signals only need to detect workpiece arrival and issue a non-conforming electrical signal after testing; both signals are output to the central control system. Attached Figure Description

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a schematic diagram of the structure of an online measuring device for the bore diameter of an engine bearing cap according to the present invention; Figure 2 This is a schematic diagram of the structure of this novel industrial motherboard; Figure 3 This is the electrical schematic diagram of this novel invention; In the diagram: 1-Measuring platform; 2-Bracket; 20-Base plate; 21-Support column; 22-Reinforcing plate; 3-Tooling mother plate; 4-Positioning pin; 5-Laser sensor; 50-First delay contact; 51-Main circuit power supply; 52-Intermediate relay; 53-Second delay contact; 54-First time relay; 55-Second time relay; 6-Elongated hole; 60-Second control contact; 61-Buzzer; 7-Positioning block; 8-Induction sensor. Detailed Implementation

[0014] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0015] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0016] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0017] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0018] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0019] Example 1 See attached document Figure 1-3 This utility model discloses an online measuring device for the bore diameter of an engine bearing cover, including a measuring platform 1. The measuring platform 1 includes two vertically arranged supports 2, which serve as the rigid foundation and supporting frame of the entire device. Each support 2 includes a base plate 20, on which a support column 21 is fixed. A reinforcing plate 22 is fixed on the support column 21, and the reinforcing plate 22 is fixedly connected to the base plate 20.

[0020] Two horizontally arranged tooling mother plates 3 are fixed above the two brackets 2. At least one set of positioning pins 4 are fixed on the tooling mother plates 3. Each set of positioning pins 4 consists of two pins. Their layout is designed to accurately match and reliably position the key reference holes or shapes of the bearing cover under test, ensuring that the bearing cover under test is fixed in position and has the correct posture during the measurement process. A laser sensor 5 is installed between the two positioning pins 4 in each set.

[0021] The emission and reception optical paths of these laser sensors 5 are precisely calibrated so that they can directly align with and scan the inner wall of the bore to be measured on the bearing cap. Once the bearing cap is accurately positioned by the locating pin 4, the laser sensor 5 can acquire the bore size data in real time without contact.

[0022] As a further explanation of this embodiment, the tooling mother plate 3 has multiple elongated holes 6, each of which is located between each set of positioning pins 4, and the laser sensor 5 is located below each elongated hole 6. The laser beam emitted by the laser sensor 5 can pass through the elongated holes 6 and reach the inner wall of the bore diameter to be measured on the bearing cover.

[0023] As a further explanation of this embodiment, As a further explanation of this embodiment, a sensing sensor 8 is fixed on the upper surface of the tooling mother plate 3. The sensing sensor 8 is a magnetic sensing sensor or a photoelectric sensor.

[0024] As a further explanation of this embodiment, the present invention also includes a control circuit. The laser sensor 5 and the first delay contact 50 are connected in series and connected to the main circuit power supply 51. The main circuit power supply 51 is a 220V power supply connected to an air switch and then connected to a transformer to step down to a 24V power supply. The air switch can provide short circuit or overload protection.

[0025] The main circuit power supply 51 is also connected to an intermediate relay 52. ​​The intermediate relay 52 is connected to the laser sensor 5 through a second delay contact 53. The first delay contact 50 is the delay contact of the first time relay 54, and the second delay contact 53 is the delay contact of the second time relay 55. The first time relay 54 and the second time relay 55 are connected in parallel and then connected to the main circuit power supply 51. The first time relay 54 and the second time relay 55 are electrically connected to the sensing sensor 8, and the sensing sensor 8 is connected to the main circuit power supply 51.

[0026] After the sensing sensor 8 detects that the workpiece has been placed on the tooling mother plate 3, the first time relay 54 and the second time relay 55 send signals. After receiving the signal, the first time relay 54 starts the delay program. After a delay of 3 seconds, the first delay contact 50 closes, the laser sensor 5 is energized, and the inner hole size of the workpiece is detected. After 10 seconds of detection, the second time relay 55 starts the delay program, the second delay contact 53 closes, the laser sensor 5 detects the inner diameter of the workpiece, and compares it with the standard size. If the size error is within 0.2 mm after comparison, the workpiece size is determined to be qualified, and an electrical signal is sent to the intermediate relay 52. ​​After the intermediate relay 52 is energized, it converts the weak current signal into a strong current signal and starts the gripper on the gantry to transfer the workpiece.

[0027] As a further explanation of this embodiment, the intermediate relay 52 is also electrically connected to the second control contact 60, which is connected in series with the buzzer 61 and then connected to the main circuit power supply 51.

[0028] When the laser sensor 5 detects an aperture error greater than 0.2mm, the workpiece is deemed dimensionally unqualified. A signal is sent to the intermediate relay 52, which converts the weak current signal into a strong current signal, triggering the buzzer 61 to sound an alarm. The gantry and gripper then stop operating, awaiting manual intervention. This inspection device has a compact structure, is suitable for inspecting multiple products simultaneously, and its automated inspection improves efficiency. This device is designed for automatic operation; adding it to an existing production line only requires adding a gantry for fixed-point workpiece placement and removal, making the modification simple. The signals only need to detect workpiece arrival and issue a non-conforming electrical signal after inspection; both signals are output to the central control system.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, multiple improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An online measuring device for the bore diameter of an engine bearing cap, comprising a measuring table (1), characterized in that, The measuring platform (1) includes a bracket (2) and a tooling mother plate (3) fixed on the bracket (2). At least one set of positioning pins (4) are fixed on the tooling mother plate (3), and a laser sensor (5) is installed between each set of positioning pins (4).

2. The online measuring device for the bore diameter of the engine bearing cap as described in claim 1, characterized in that, The tooling mother plate (3) has multiple elongated holes (6), each of the elongated holes (6) is located between each set of positioning pins (4), and the laser sensor (5) is located below the elongated holes (6).

3. The online measuring device for the bore diameter of the engine bearing cap as described in claim 2, characterized in that, The laser sensor (5) is fixedly connected to the tooling mother plate (3) via the positioning block (7).

4. The online measuring device for the bore diameter of the engine bearing cap as described in claim 3, characterized in that, A sensing sensor (8) is fixed on the tooling mother plate (3).

5. The online measuring device for the bore diameter of the engine bearing cap as described in claim 4, characterized in that, The bracket (2) includes a base plate (20), a support column (21) is fixed on the base plate (20), a reinforcing plate (22) is fixed on the support column (21), and the reinforcing plate (22) is fixedly connected to the base plate (20).

6. The online measuring device for the bore diameter of the engine bearing cap as described in claim 5, characterized in that, The positioning block (7) is fixed to the lower surface of the tooling mother plate (3) by bolts.

7. The online measuring device for the bore diameter of the engine bearing cap as described in claim 6, characterized in that, The laser sensor (5) is connected in series with the first delay contact (50) and then connected to the main circuit power supply (51). The main circuit power supply (51) is also connected to an intermediate relay (52). The intermediate relay (52) is connected to the laser sensor (5) through the second delay contact (53). The first delay contact (50) is the delay contact of the first time relay (54), and the second delay contact (53) is the delay contact of the second time relay (55). The first time relay (54) and the second time relay (55) are connected in parallel and then connected to the main circuit power supply (51). The first time relay (54) and the second time relay (55) are electrically connected to the sensing sensor (8). The sensing sensor (8) is connected to the main circuit power supply (51).

8. The online measuring device for the bore diameter of the engine bearing cap as described in claim 7, characterized in that, The intermediate relay (52) is also electrically connected to the second control contact (60), which is connected in series with the buzzer (61) and then connected to the main circuit power supply (51).

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