CN208223744U - A kind of engine front cover assembly leakage detection apparatus - Google Patents

Abstract

The utility model discloses a leak detection device for an engine front cover assembly, which is characterized in that: the engine front cover assembly leak detection device includes a workpiece station, a clamp body, an oil pressure system, and a pneumatic system arranged on a frame body , an oil seal detection device (10), an air tightness detection device (5), a water detection system and an electrical system; the oil seal detection device (10) has a laser ranging sensor for measuring the installation height and parallelism of the oil seal. The utility model can quickly and efficiently detect the installation size of the oil seal and the airtightness of the front cover assembly. Through the redesign of the overall structure, the leak test tool and the press-fit tool can be combined, and the operation does not interfere with each other, realizing air tightness. The integration of tightness detection and press-fitting has a simple structure and occupies a small area, which improves the utilization rate of the machine and reduces cost investment at the same time.

Description

Leak detection device for engine front cover assembly

technical field

The utility model belongs to the technical field of die-casting equipment, in particular to a leak detection device for an engine front cover assembly.

Background technique

Nowadays, with the rapid development of the automobile industry, the demand for engine front covers is also increasing. The front cover of the engine needs to be installed with an oil seal. If the oil seal is not installed correctly, the sealing performance of the front cover assembly will be poor, which will cause leakage failures during the use of the car.

The current leak detection device cannot detect the height and parallelism of the oil seal. In the first case, it is necessary to go through the entire leak detection process to determine the air tightness. There are many detection processes and time-consuming, and it is impossible to determine the cause of the unqualified air tightness. Whether it is caused by the installation height and parallelism of the oil seal; the second case is that the height and parallelism of the installed oil seal meet the safety range of the leakage value of the airtight test, which is used as the detection standard for the oil seal height and parallelism It is too loose and not precise enough. Practice has proved that small defects in the height and parallelism of the oil seal can pass the air tightness test, but it will still cause leakage accidents during subsequent use.

Moreover, the current air-tightness testing and press-fitting oil seal are carried out by one air-tightness testing machine and one press-fitting oil seal machine respectively. This method requires the production of two special machines, which increases the floor space, increases the process, and requires staffing. Also corresponding increase, equipment cost and labor cost will all increase.

Utility model content

Aiming at at least one of the above defects or improvement needs of the prior art, the utility model provides an engine front cover assembly leak detection device, which can quickly and efficiently detect the installation size of the oil seal and the airtightness of the front cover assembly. The redesign of the overall structure can further combine the leak test tooling and press-fitting tooling, so that the operation does not interfere with each other, and the integration of air-tightness testing and press-fitting is realized. The structure is simple and occupies a small area, which improves the utilization rate of the machine. At the same time, the cost input is reduced.

In order to achieve the above object, according to one aspect of the present invention, a leak detection device for an engine front cover assembly is provided, the engine front cover assembly leak detection device includes a workpiece station, a clamp body, Oil pressure system, pneumatic system, oil seal detection device, air tight detection device, water detection system and electrical system;

The workpiece station is arranged in the middle of the frame body; the clamp body is arranged at the workpiece station for positioning and clamping the engine front cover assembly for loading, and has a workpiece position detection sensor;

The hydraulic system includes an upper pressure plate and a main pressure oil cylinder, the upper pressure plate is connected below the main pressure oil cylinder and located above the workpiece station, and the main pressure oil cylinder drives the upper pressure plate to move up and down;

The pneumatic system includes an oil seal hole sealing mechanism and a side sealing mechanism. The oil seal hole sealing mechanism is connected to the lower surface of the upper platen and is driven to move up and down by the main pressure cylinder, and the oil seal hole is blocked The mechanism can also slide horizontally along the lower surface of the upper pressure plate; the side blocking mechanism is arranged on the side of the engine front cover assembly;

The oil seal detection device is arranged on the side of the engine front cover assembly and above the side blocking mechanism, and the oil seal detection device has a laser ranging sensor for measuring the installation height and parallelism of the oil seal;

The airtight detection device includes a gas pressurization mechanism and a gas leakage sensor;

The water inspection system is located below the workpiece station, including a water tank and its lifting mechanism;

The electrical system includes an audible and visual alarm mechanism.

Preferably, the pneumatic system further includes an oil seal pressing mechanism, and the oil seal pressing mechanism is fixed on the lower surface of the upper pressing plate.

Preferably, the pneumatic system further includes a plugging and press-fit switching mechanism, the plugging and press-fit switching mechanism is fixed on the lower surface of the upper platen, and the plugging and press-fit switching mechanism drives the oil seal hole seal The plugging mechanism moves in a plane along the lower surface of the upper platen, and the oil seal hole plugging mechanism, oil seal press-fitting mechanism, plugging and press-fitting switching mechanism itself can move up and down independently of the main pressure cylinder. .

Preferably, the side blocking mechanism includes a right blocking mechanism and a left blocking mechanism; the right blocking mechanism and the left blocking mechanism themselves have driving electric cylinders to move left and right, and are used to move the engine front cover The sides of the assembly are blocked.

Preferably, the electrical system further includes an electrical box, a pressure gauge, and an operation panel, the electrical box and the pressure gauge are arranged on the side of the frame body, and the airtight detection device and the operation panel are arranged on On the electrical box, the operation panel has a display for displaying the information of the whole machine.

Preferably, the engine front cover assembly leak detection device also includes a safety device, the safety device includes a two-hand switch and a safety grating, the safety grating is composed of a left safety grating and a right safety grating, respectively fixed on the frame body The two sides are oppositely arranged and connected with the sound and light alarm mechanism.

The above preferred technical features can be combined with each other as long as they do not conflict with each other.

Generally speaking, compared with the prior art, the above technical solution conceived by the utility model has the following beneficial effects:

1. The leak detection device of the engine front cover assembly of the utility model can quickly and efficiently detect the installation height and parallelism of the oil seal through the laser ranging sensor of the oil seal detection device; through the cooperation of the air tight detection device and other structures, it can Quickly and efficiently detect the airtightness of the front cover assembly;

2. Through the redesign of the overall structure, the leak test tooling and press-fitting tooling can be further merged, the operation does not interfere with each other, and the integration of air-tightness testing and press-fitting is realized. The structure is simple and occupies a small area, improving the machine. Utilization rate, while reducing cost input;

3. The utility model has high stability, is suitable for different batches and different types of workpieces, has a wide application range, strong adaptability, and low cost, which is conducive to popularization and application.

Description of drawings

Fig. 1 is the schematic diagram of the leak detection device of engine front cover assembly of the present utility model;

Fig. 2 is a schematic diagram of a certain type of engine front cover assembly of the utility model;

Fig. 3 is a schematic view illustrating the method of using the leak detection device for the engine front cover assembly of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other. The utility model will be further described in detail below in conjunction with specific embodiments.

As a preferred embodiment of the present utility model, as shown in Figure 1, the present utility model provides a leak detection device for an engine front cover assembly, the engine front cover assembly leak detection device includes a Work station, clamp body, hydraulic system, pneumatic system, oil seal detection device 10, air tight detection device 5, water detection system and electrical system, etc.

The workpiece station is arranged in the middle of the frame body; the clamp body is arranged at the workpiece station for positioning and clamping the engine front cover assembly 2 for loading, and has a workpiece position detection sensor , can be an infrared device, and detects whether the positioning is in place through the on-off situation of the optical path of the infrared emitting device and the receiving device. The design of the clamp body fully considers the convenience of workpiece clamping and reliable compression, and the hard nylon filler is used to reduce the detection volume of the workpiece. As shown in Figure 2, a certain type of engine front cover assembly 2 includes a front cover 21 and an oil seal 22. This type of engine front cover assembly 2 has an oil seal hole and no holes on the side, and can also be a plurality of oil seal holes and oil seals. The oil seal and the side have openings.

The hydraulic system includes an upper platen and a main pressure oil cylinder 8, the upper platen is connected below the main pressure oil cylinder 8 and is located above the workpiece station, the main pressure oil cylinder 8 adopts a double guide rod oil cylinder to drive the The above-mentioned upper pressing plate moves up and down without deforming the workpiece.

The pneumatic system includes an oil seal hole sealing mechanism 9 and a side sealing mechanism, which may specifically adopt a structure similar to the applicant's prior application CN201820591610.7. The oil seal hole blocking mechanism 9 is connected to the lower surface of the upper platen, and is driven to move up and down by the main pressure cylinder 8, and the oil seal hole sealing mechanism 9 can also slide horizontally along the lower surface of the upper platen; The side blocking mechanism is arranged on the side of the engine front cover assembly 2 . Preferably, the pneumatic system further includes an oil seal pressing mechanism, and the oil seal pressing mechanism is fixed on the lower surface of the upper pressing plate. Preferably, the pneumatic system further includes a plugging and press-fit switching mechanism, the plugging and press-fit switching mechanism is fixed on the lower surface of the upper platen, and the plugging and press-fit switching mechanism drives the oil seal hole seal The blocking mechanism 9 moves in a plane along the lower surface of the upper platen, and the oil seal hole blocking mechanism 9, the oil seal pressing mechanism, the blocking and pressing switching mechanism itself can move up and down independently of the main pressure cylinder 8 telescopic cylinder. The oil seal hole sealing mechanism 9 has multiple sets of cylinders and plugs to accommodate workpieces of multiple oil seal hole types. Through the redesign and structure of the overall structure, the utility model can further combine the leak test tooling and the press-fitting tool, and the operation does not interfere with each other, and realizes the integration of air-tightness detection and press-fitting. The structure is simple and occupies a small area, which improves the machine Taiwan utilization rate, while reducing cost input.

The oil seal detection device 10 is arranged on the side of the engine front cover assembly 2 and above the side blocking mechanism, and the oil seal detection device 10 has a laser distance measuring sensor for measuring the installation height and parallelism of the oil seal. Measurement. The leak detection device of the engine front cover assembly of the utility model can quickly and efficiently detect the installation height and parallelism of the oil seal through the laser ranging sensor of the added oil seal detection device, and obtain intuitive parameters. If the detection fails, the leak detection The device will record the installation height and parallelism of the oil seal, stop the action and automatically alarm, there is no need for air tightness testing.

The airtight detection device 5 includes a gas pressurization mechanism and a gas leakage sensor. The water inspection system is located below the workpiece station, including a water tank 12, and adopts a double-cylinder synchronous jacking and lifting mechanism, which is fast and reliable. In consideration of safety protection, the electrical system includes an audible and visual alarm mechanism, such as a warning lamp 7 . The engine front cover assembly leak detection device also includes a safety device, the safety device includes a two-hand switch 1 and a safety grating, and the safety grating is composed of a left safety grating 11 and a right safety grating 3, which are respectively fixed on the frame body The two sides are oppositely arranged and connected with the sound and light alarm mechanism.

For the workpiece model with openings on the side, the side blocking mechanism includes a right blocking mechanism and a left blocking mechanism; the right blocking mechanism and the left blocking mechanism themselves have driving electric cylinders to move left and right, and To block the side of the engine front cover assembly 2.

The electrical system also includes an electrical box 4, a pressure gauge 6, and an operation panel, the electrical box 4 and the pressure gauge 6 are arranged on the side of the frame body, and the airtight detection device 5 and the operation panel are arranged on On the electrical box 4, the operation panel has a display for displaying the information of the whole machine.

As shown in Figure 3, the usage method of the engine front cover assembly leak detection device of the present utility model is briefly introduced as follows, which includes the following steps:

Step 1: Put the engine front cover assembly workpiece at the workpiece station of the leak detection device, position and clamp the workpiece with the clamp body, and then activate the two-hand switch 1 with both hands.

Step 2: When the leak detection device receives the start signal, the workpiece position detection sensor on the clamp body will detect whether the workpiece is clamped in place. If the workpiece is not clamped in place or there is no workpiece, the leak detection device will stop and automatically alarm .

Step 3: When the workpiece position detection sensor detects normal, the laser ranging sensor of the oil seal detection device 10 will measure the installation height and parallelism of the oil seal. If the detection fails, the leak detection device will record the installation height and parallelism of the oil seal. It will stop the action and alarm automatically; the unqualified workpiece will be removed and sent for maintenance or scrapped, and the next workpiece will be replaced. Before the air tightness test, through the fast and efficient detection of the installation height and parallelism of the oil seal, unqualified products can be eliminated to prevent defective parts from flowing to customers and cause car leakage quality accidents, and meet the error prevention requirements without entering the next step. Tightness detection saves process and labor, reduces time-consuming and improves detection efficiency.

Step 4: When the laser distance measuring sensor of the oil seal detection device 10 detects normal, the main pressure cylinder 8 descends, the oil seal hole sealing mechanism 9 seals the workpiece, adopts linear sealing to reduce the internal volume change, and the air tightness detection device 5 pressurizes and Air leakage detection, if the detected gas leakage value of the product is less than the set threshold, it is determined that the air tightness test is qualified, and the leak detection device will record the product leakage value, mark the product as qualified, and automatically unseal and reset;

Step 5: When the gas leakage value is greater than the set threshold, it is judged that the air tightness detection is abnormal. At this time, the water tank 12 rises to cover the workpiece, and the leak detection device performs a water test to observe the position of the air bubbles, so as to determine the leak position. After leaking position, manually reset. If the leakage position is at the oil seal, the unqualified workpiece is removed and sent to the maintenance or pre-pressing process, and the next workpiece is replaced. If the leakage location is at other cracks in the front cover, the unqualified workpiece is removed and discarded, and the next workpiece is replaced.

Preferably, before the third step, an oil seal press-fitting process is preferably included, that is, the main pressure cylinder 8 drives the oil seal press-fit mechanism to move down to the oil seal hole of the workpiece to press-fit the oil seal 22, and then returns to the initial position; In the process of sealing the workpiece by the oil seal hole sealing mechanism 9 in the step 4, preferably, the oil seal hole sealing mechanism 9 is moved horizontally along the lower surface of the upper platen to the oil seal hole of the workpiece through the cylinder control of the plugging and press-fit switching mechanism Then the oil seal hole sealing mechanism 9 itself moves down through the cylinder to the precise alignment of the orifice, so as to realize the complete sealing of the workpiece for airtight testing; The press-fit switching mechanism returns to the initial position in turn. The utility model integrates the leak testing process and the press-fitting process, completes two front and rear processes in one detection, and the operation does not interfere with each other, and realizes the integration of air-tightness detection and press-fitting. The structure is simple and occupies a small area, which improves the utilization of the machine. rate, while reducing cost input.

Preferably, if there is an opening on the side of the workpiece, in the process of sealing the workpiece by the oil seal hole sealing mechanism 9 in the step 4, a side sealing process is also included; preferably, the right side sealing mechanism, the left side The blocking mechanism blocks the side of the workpiece under the control of the electric cylinder. The utility model has high stability, is suitable for different batches and different types of workpieces, has wide application range, strong adaptability, and low cost, which is favorable for popularization and application.

If the left and right safety light barriers detect the abnormal penetration of foreign objects including the human body, the current action will be stopped immediately, and the current action will continue after returning to normal, ensuring the safety of personnel and equipment.

Those skilled in the art can easily understand that the above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and modifications made within the spirit and principles of the utility model Improvements and the like should all be included within the protection scope of the present utility model.

Claims (6)

1. A front engine cover assembly leak detection device is characterized in that: the engine front cover assembly leak detection device includes a workpiece station, a clamp body, an oil pressure system, a pneumatic system, and an oil seal detection device arranged on the frame body device (10), airtight detection device (5), water detection system and electrical system; The workpiece station is arranged in the middle of the frame body; the clamp body is arranged at the workpiece station for positioning and clamping the engine front cover assembly (2) for loading, and has a workpiece position detection sensor; The hydraulic system includes an upper pressing plate and a main pressure oil cylinder (8), the upper pressing plate is connected below the main pressure oil cylinder (8) and is located above the workpiece station, and the main pressure oil cylinder (8) drives the The upper platen moves up and down; The pneumatic system includes an oil seal hole plugging mechanism (9) and a side plugging mechanism, the oil seal hole plugging mechanism (9) is connected to the lower surface of the upper platen, and is driven up and down by the main pressure cylinder (8) movement, and the oil seal hole blocking mechanism (9) can also slide horizontally along the lower surface of the upper platen; the side blocking mechanism is arranged on the side of the engine front cover assembly (2); The oil seal detection device (10) is arranged on the side of the engine front cover assembly (2) and above the side sealing mechanism, and the oil seal detection device (10) has a laser ranging sensor for checking the oil seal Measure the installation height and parallelism; The airtight detection device (5) includes a gas pressurization mechanism and a gas leakage sensor; The water inspection system is located below the workpiece station and includes a water tank (12) and its lifting mechanism; The electrical system includes an audible and visual alarm mechanism. 2 . The engine front cover assembly leak detection device according to claim 1 , wherein the pneumatic system further includes an oil seal press-fit mechanism, and the oil seal press-fit mechanism is fixed on the lower surface of the upper pressing plate. 3 . 3. The engine front cover assembly leak detection device according to claim 2, characterized in that: said pneumatic system also includes a plugging and press-fit switching mechanism, and the plugging and press-fit switching mechanism is fixed on the upper platen the lower surface of the upper platen, the plugging and press-fit switching mechanism drives the oil seal hole plugging mechanism (9) to move in a plane along the lower surface of the upper platen, and the oil seal hole plugging mechanism (9), oil seal press-fit Mechanism, plugging and press-fit switching mechanism themselves can all be independent of the main pressure oil cylinder (8) to move up and down telescopic cylinders. 4. The engine front cover assembly leak detection device according to any one of claims 1-3, characterized in that: the side sealing mechanism comprises a right blocking mechanism and a left blocking mechanism; The blocking mechanism and the left blocking mechanism themselves have driving electric cylinders to move left and right, and are used to block the side of the engine front cover assembly (2). 5. The engine front cover assembly leak detection device according to any one of claims 1-3, characterized in that: the electrical system also includes an electrical box (4), a pressure gauge (6), an operation panel, and the The electrical box (4) and the pressure gauge (6) are arranged on the side of the frame body, the airtight detection device (5) and the operation panel are arranged on the electrical box (4), the The operation panel has a display for displaying overall machine information. 6. The engine front cover assembly leak detection device according to any one of claims 1-3, characterized in that: the engine front cover assembly leak detection device also includes a safety device, and the safety device includes a two-hand switch (1 ) and a safety grating, the safety grating is composed of a left safety grating (11) and a right safety grating (3), which are respectively fixed on opposite sides of the frame body and connected to the sound and light alarm mechanism.