Crankshaft center hole sand hole detection device

Abstract

The utility model provides a crankshaft center hole sand hole detection device, which comprises a support frame, the support frame is vacant on a conveying line for a crankshaft to pass through, and side plates of the support frame, which are positioned at two end parts of the crankshaft, are inwards provided with axial positioning and clamping devices along the horizontal direction. When the crankshaft passes through, the axial positioning and clamping devices located at the two ends of the crankshaft drive the leakage test sealing seats to axially move to clamp the two ends of the crankshaft, the leakage test sealing seats are arranged on center holes in the two ends of the crankshaft in a sleeving mode, and then a pressure air source is communicated with the leakage test sealing seats to conduct sealing detection on the center holes of the crankshaft.

Description

Technical Field

[0001] The utility model belongs to the technical field of engine crankshaft center hole sand hole detection equipment, in particular to a crankshaft center hole sand hole detection device. Background Art

[0002] As we all know, the engine is the heart of the car, and the production and processing quality of engine parts will seriously affect the overall quality of the engine, so the control of engine parts processing quality is particularly important. The engine crankshaft is one of the three major parts of the engine and the most critical part. When the engine is working, the lubricating oil from the oil pump will first enter the oil channel at the end of the crankshaft under the action of pressure, and then enter the crankshaft oil channel hole from the oil channel at the end of the crankshaft. Under the action of the rapid rotation of the crankshaft, the lubricating oil splashes from the big end of the connecting rod to the cylinder wall, the small end of the connecting rod, etc., and lubricates the big end of the connecting rod, the small end of the connecting rod, the cylinder wall, the piston and the piston ring.

[0003] If there are sand holes on the wall of the crankshaft center oil channel, which is the same as the outside, the pressure of the lubricating oil cannot be established, resulting in a significant reduction in the amount of lubricating oil ejected from the connecting rod big end, or the lubricating oil cannot be ejected to the parts to be lubricated, which will cause abnormal wear of the cylinder wall, piston and ring, connecting rod big end, and connecting rod small end due to poor lubrication. In mild cases, the cylinder wall and piston will be strained, and in severe cases, the connecting rod big end and small end will be burned, causing the cylinder body piston ring, piston, and crankshaft to be scrapped, and even the engine to be scrapped. The absence of sand holes in the crankshaft center hole is the key to ensuring that the front and rear ends of the crankshaft do not leak oil during engine operation. Utility Model Content

[0004] The utility model provides a device for detecting sand holes in a crankshaft center hole, which is intended to perform leak testing on sand holes in the crankshaft center hole of an engine.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for detecting sand holes in the center hole of a crankshaft comprises a support frame, wherein the support frame is placed idle on a conveyor line through which the crankshaft passes, and the side plates of the support frame located at both ends of the crankshaft are provided with axial positioning clamping devices inwardly in the horizontal direction, and the axial positioning clamping devices axially displace and clamp the two ends of the crankshaft, and the inner end of the axial positioning clamping device is provided with a leak test sealing seat, and the leak test sealing seat is in sealing cooperation with the end center hole of the crankshaft, and the leak test sealing seat is connected to a pressure gas source to perform a sealing detection on the center hole of the crankshaft.

[0007] In the above scheme, the support frame is placed on the conveyor line. When the crankshaft passes through, the axial positioning clamping devices at both ends of the crankshaft will cause the leak test sealing seat to axially displace and clamp the two ends of the crankshaft. The leak test sealing seat sleeve is arranged on the center holes at both ends of the crankshaft, and then a pressure air source is connected to the leak test sealing seat to perform a sealing test on the center hole of the crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the assembly state of the utility model;

[0009] Figure 2 , 3 It is a three-dimensional structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0010] like Figures 1 to 3 The crankshaft center hole sand hole detection device shown includes a support frame 1, and the support frame 1 is vacant on the conveyor line B for the crankshaft A to pass through. The side plates 2 of the support frame 1 located at the two ends of the crankshaft A are provided with axial positioning clamping devices 10 inwardly in the horizontal direction. The axial positioning clamping device 10 axially displaces and clamps the two ends of the crankshaft A. The inner end of the axial positioning clamping device 10 is provided with a leak test sealing seat 20, and the leak test sealing seat 20 is sealed with the end center hole of the crankshaft A. The leak test sealing seat 20 is connected to a pressure gas source to perform a sealing test on the center hole of the crankshaft A.

[0011] First of all, it should be explained that the processing object in this scheme is the crankshaft A that needs to be transported to the next step of assembly after preliminary processing. Therefore, it is necessary to conduct a leak test on the center hole of the crankshaft to ensure that the center holes at the front and rear ends of the crankshaft A do not leak oil during the operation of the engine. In the above scheme, the support frame 1 is vacant on the conveyor line B for the crankshaft A to pass through. After the crankshaft A is transported to the specified position, the axial positioning clamping device 10 located at both ends of the crankshaft A axially displaces and clamps the two ends of the crankshaft A with the leak test seal seat 20, so that the leak test seal seat 20 is sealed with the end center hole of the crankshaft A. Then the pressure air source vents the leak test seal seat 20 for sealing detection. The pressure air source in the above scheme is usually a leak tester. The air intake pipe of the leak test seal seat 20 is connected to the leak tester. The leak tester performs pressure and flow detection on the end center hole of the crankshaft A.

[0012] Preferably, the leak test sealing seat 20 is in the shape of a hollow tube seat as a whole, the bottom of the leak test sealing seat 20 is fixedly connected to the axial positioning clamping device 10, the tube wall of the leak test sealing seat 20 is connected to the pressure gas source through an air pipe, and the leak tester injects pressure gas into the tube wall of the leak test sealing seat 20, and the inner end of the leak test sealing seat 20 is sealed with the end center hole of the crankshaft A to perform pressure and flow detection on the end center hole of the crankshaft A.

[0013] A sealing gasket 40 is provided on the inner end of the leak test seal seat 20, and a through hole is provided in the middle of the sealing gasket 40 for airflow to pass through. In the above scheme, the sealing gasket 40 with a through hole in the middle is arranged between the leak test seal seat 20 and the end of the crankshaft A, and the through hole in the middle of the sealing gasket 40 allows the pressure airflow to pass through the center hole at the end of the crankshaft A to detect the pressure and flow.

[0014] Furthermore, a marking device 50 is provided horizontally inwardly on a side plate 2 of the support frame 1 at the end of the crankshaft A. During the leak test, if the pressure and flow of the crankshaft A are within the qualified range, the leak test is determined to be qualified, and the marking device 50 marks the crankshaft A.

[0015] Furthermore, a workpiece detection probe 60 is provided on the side plate 2, and a stop device 70 is provided downstream of the conveyor line B. When the workpiece detection probe 60 detects the crankshaft A, the stop head 71 on the stop device 70 extends to stop the conveyor line B. In the above scheme, a workpiece detection probe 60 is provided on the side plate 2 of the support frame 1. When the workpiece detection probe 60 detects that the crankshaft A passes, the stop device 70 located downstream of the conveyor line B will extend the stop head 71 to stop the conveyor line B, thereby stopping the crankshaft A. Furthermore, an angular positioning block 4 is provided on the upper plate 3 of the support frame 1, extending downward from the upper plate 3. The angular positioning block 4 is a tiger's mouth type with an open lower end. The bayonet on the angular positioning block 4 with the opening facing downward is clamped on the connecting rod neck A1 to perform circumferential positioning of the crankshaft A. In the above scheme, when the crankshaft A to be inspected is transported to the designated position via the conveyor line B, the axial positioning clamping device 10 clamps the crankshaft A at both ends in the horizontal direction, and the bayonet with the opening facing downward on the angular positioning block 4 is clamped on the connecting rod neck A1 to perform circumferential positioning of the crankshaft A. The angular positioning block 4 is a tiger's mouth type with an open lower end, which can facilitate the angular positioning block 4 to clamp the connecting rod neck A1 and complete the circumferential positioning of the crankshaft A. The angular positioning block 4 uses its mouth side wall to constrain the shaft body side of the connecting rod neck A1 to drive it to swing to the best positioning position, and the position of the crankshaft is determined at this time.

Claims

1. A device for detecting sand holes in the center hole of a crankshaft, comprising a support frame (1), wherein the support frame (1) is placed vacantly on a conveyor line (B) through which a crankshaft (A) passes, and wherein side plates (2) of the support frame (1) located at both ends of the crankshaft (A) are provided with axial positioning clamping devices (10) inwardly in the horizontal direction, wherein the axial positioning clamping devices (10) are axially displaced to clamp both ends of the crankshaft (A), and wherein: A leak test seal seat (20) is provided at the inner end of the axial positioning clamping device (10). The leak test seal seat (20) is in sealing cooperation with the end center hole of the crankshaft (A). The leak test seal seat (20) is connected to a pressure gas source to perform a sealing test on the end center hole of the crankshaft (A).

2. The crankshaft center hole sand hole detection device according to claim 1, characterized in that: The leak test seal seat (20) is in the shape of a hollow tube seat as a whole. The tube wall of the leak test seal seat (20) is connected to the pressure gas source through an air pipe. The bottom of the leak test seal seat (20) is fixedly connected to the axial positioning clamping device (10). The inner end of the leak test seal seat (20) is sealed and matched with the center hole of the end of the crankshaft (A).

3. The crankshaft center hole sand hole detection device according to claim 2, characterized in that: A sealing gasket (40) is provided on the inner end of the leak test sealing seat (20), and a through hole is provided in the middle of the sealing gasket (40) for air flow to pass through.

4. The crankshaft center hole sand hole detection device according to claim 1, characterized in that: The support frame (1) is provided with a marking device (50) on a side plate (2) located at the end of the crankshaft (A) inwardly along the horizontal direction.

5. The crankshaft center hole sand hole detection device according to claim 1, characterized in that: A workpiece detection probe (60) is provided on the side plate (2), and a stop device (70) is provided downstream of the conveyor line (B). When the workpiece detection probe (60) detects the crankshaft (A), a stop head (71) on the stop device (70) extends to stop the conveyor line (B).

6. The crankshaft center hole sand hole detection device according to claim 1, characterized in that: An angular positioning block (4) is provided on the upper plate (3) of the support frame (1) and extends downward from the upper plate (3). The angular positioning block (4) is a tiger's mouth type with an open lower end. The angular positioning block (4) has a bayonet with an opening facing downward and is clamped on the connecting rod neck (A1) to perform circumferential positioning of the crankshaft (A).

Images