Detection device and detection method for detecting sealing property of automobile standard part

Abstract

The application relates to a detection device and a detection method for detecting the sealing performance of a standard part of an automobile, which comprises a sealing sleeve, a piston and a water injection part. The sealing sleeve is sealingly covered on a first side of the automobile sheet metal and surrounds a detection area of the standard part. The piston comprises a plug arranged in the sealing sleeve and a handle connected with the plug and penetrating the wall of the sealing sleeve. The water injection part is in fluid communication with the inside of the sealing sleeve. The detection device is configured to move the plug through the handle to apply water pressure to the detection area, so as to determine whether there is water seepage at the position of the standard part on the second side opposite to the first side. The detection device can realize the detection of the sealing performance of the standard part at the part level, and is flexible and simple to operate, short in time consumption and low in cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle body manufacturing. More particularly, the present application relates to a detection device and a detection method for detecting the sealing performance of a standard part of a vehicle. BACKGROUND

[0002] When a vehicle is designed, the space is divided into two parts, one part is a dry area, and the other part is a wet area. The interior of the cab and part of the vehicle cavity are defined as the dry area, and water or dust is not allowed to enter. The exterior of the vehicle, especially the area below the vehicle floor, is defined as the wet area. The vehicle body, including sheet metal, glass, sealing strips, etc., separates the dry area from the wet area. Since the vehicle body provides mounting points for other parts such as fuel tanks, chassis, etc., and the fixing of the vehicle body and other parts is generally by bolt connection, nuts or bolts are provided on the vehicle body.

[0003] In order to ensure the strength of the standard parts (such as nuts and bolts), the vehicle body sheet metal needs to be drilled for the standard parts. After the vehicle body sheet metal is drilled, in the water road condition, especially at high speed, the water flow will have a great impact on the vehicle body, which will cause the lower floor area of the vehicle body to be prone to water leakage. In order to ensure the sealing performance of this area, manufacturers generally use pull riveting or press riveting standard parts. However, due to part manufacturing tolerances, manual operation and other factors, there may still be some pull riveting or press riveting standard parts that do not meet the sealing performance.

[0004] Currently, vehicle sealing performance is tested by whole vehicle level road test, rain test, water test, etc. However, this method has the following main defects: on the one hand, after the standard part with sealing problem is solved, whole vehicle level test is still needed, the whole process is long and costly; on the other hand, after the test is completed, due to the large number of vehicle parts, some parts block the standard part area, making it difficult to check the sealing performance of the standard part area. SUMMARY

[0005] The present application aims to overcome the defects in the prior art and provides a detection device and a detection method for detecting the sealing performance of a standard part of a vehicle. The detection device can detect the sealing performance of the standard part at the part level, and during the detection process, a certain water pressure is applied to the standard part to simulate the water flow impact on the standard part in the road condition, making it closer to the actual vehicle condition.

[0006] To this end, the first aspect of the present application provides a detection device for detecting the sealing performance of a standard part of a vehicle, the detection device comprising: a sealing sleeve, which sealingly covers a detection area surrounding the standard part on a first side of the vehicle panel; a piston, which comprises a plug arranged in the sealing sleeve and a handle connected to the plug through a wall of the sealing sleeve; and a water injection part, which is in fluid communication with the inside of the sealing sleeve; wherein the detection device is configured to move the plug through the handle to apply water pressure to the detection area, so as to determine whether there is water leakage at the position of the standard part on a second side opposite to the first side.

[0007] According to an optional embodiment of the present application, the sealing sleeve comprises: a fixed part, which is fixed to the detection area and delimits a first cavity; and a hydraulic part, which is sealingly connected to the fixed part and delimits a second cavity in communication with the first cavity; wherein the plug is arranged in the second cavity and matches the size of the second cavity, and the inner wall of the hydraulic part and the end face of the plug towards the standard part jointly delimit a detection chamber with variable volume.

[0008] According to an optional embodiment of the present application, the fixed part is provided with a connecting hole, and a connecting member matching the standard part is connected to the standard part through the connecting hole, so as to fix the fixed part to the detection area.

[0009] According to an optional embodiment of the present application, the hydraulic part is provided with at least one first through hole, so as to allow gas to enter or exit the second cavity.

[0010] According to an optional embodiment of the present application, the hydraulic part comprises a second through hole matching the size of the handle, so as to allow the handle to be connected to the plug through the second through hole and to be movable relative to the hydraulic part via the second through hole.

[0011] According to an optional embodiment of the present application, the handle is provided with a position marker, so as to estimate the water pressure value in the detection chamber according to the size of the handle extending out of the hydraulic part.

[0012] According to an optional embodiment of the present application, the hydraulic part is provided with a water inlet, the water injection part is connected to the water inlet through a water inlet pipe, and the water inlet pipe is provided with a valve suitable for allowing the water injection part to communicate with the water inlet or to be blocked.

[0013] According to an optional embodiment of the present application, the end face of the plug towards the standard part is an inclined face, and the end of the inclined face away from the standard part is towards the water inlet of the hydraulic part, so as to allow the gas in the detection chamber to exit along the water inlet.

[0014] According to an optional embodiment of the present application, the detection device further comprises a water pressure gauge connected to the hydraulic part to measure the water pressure in the detection cavity.

[0015] The second aspect of the present application provides a detection method for detecting the sealing performance of an automobile standard part, which comprises the detection device for detecting the sealing performance of an automobile standard part according to the first aspect of the present application, placing the plug in the sealing sleeve close to one side of the standard part, and making water enter the sealing sleeve through the water injection part; when the sealing sleeve is filled with water, moving the plug to the side of the sealing sleeve away from the standard part through the handle to make the water in the water injection part be sucked into the sealing sleeve, and then blocking the water injection part and the sealing sleeve; moving the plug to the side of the sealing sleeve close to the standard part to apply water pressure to the detection area, and then observing whether water leaks from the position of the standard part on the second side opposite to the first side.

[0016] Compared with the prior art, the detection device for detecting the sealing performance of an automobile standard part according to the present application has a plurality of beneficial effects, especially can realize the detection of the sealing performance of the standard part at the part level, and solves the problem that all the sealing performance of the standard part cannot be checked after the test. If there is a sealing problem in the standard part area, the part can be replaced in time for detection again, without the need for repair at the whole vehicle level, thereby saving the time and cost of sealing test. BRIEF DESCRIPTION OF DRAWINGS

[0017] Other features and advantages of the present application will be better understood through the following preferred embodiments described in detail in conjunction with the accompanying drawings, in which the same reference numerals represent the same or similar components.

[0018] Figure 1 is a schematic diagram of the overall structure of the detection device for detecting the sealing performance of an automobile standard part according to the present application;

[0019] Figure 2 is an exploded view of the detection device in Figure 1 ;

[0020] Figure 3 is a sectional view of the detection device in Figure 1 ;

[0021] Figure 4 is a schematic diagram of another embodiment of the detection device for detecting the sealing performance of an automobile standard part according to the present application;

[0022] Figure 5 is a schematic diagram of the flow of the detection method for detecting the sealing performance of an automobile standard part according to the present application.

[0023] It should be understood that the drawings are intended for purposes of illustration only and not limitation of the invention, as necessary to explain the application. DETAILED DESCRIPTION

[0024] The implementation and use of the embodiments will be discussed in detail below. It should be appreciated that the specific embodiments discussed are merely illustrative of specific ways to implement and use the application and do not limit the scope of the application.

[0025] In this specification, the directional expressions such as "upper", "lower", "top", "bottom", etc. are not absolute but relative. These directional expressions are appropriate when the components are arranged as shown in the drawings, but should be changed accordingly when the positions of the components in the drawings are changed. In addition, "inner" and "outer" are defined with reference to the radial inner and outer directions of the shown detection device.

[0026] As shown in Figure 1 and Figure 2 A standard part 61 is provided on the sheet metal 7 of the vehicle body. The detection device for detecting the sealing of the standard part of the vehicle of the present application comprises a fixed part 1, a hydraulic part 2 above the fixed part 1 and connected to the fixed part 1, a piston 3 and a water injection part 4. The fixed part 1 and the hydraulic part 2 together form a sealing sleeve which covers the first side of the sheet metal 7 of the vehicle and surrounds the detection area of the standard part 61. The fixed part 1 is provided with a connecting hole at the top, and a connecting part 62 passes through the connecting hole and is connected to the standard part 61, so as to fix the fixed part 1 on the side of the standard part 61 and make the fixed part 1 substantially concentric with the standard part 61. A sealing part 9 is provided between the fixed part 1 and the standard part 61. In this embodiment, the standard part 61 is a nut, and a bolt is used as the connecting part 62, and the specifications of the bolt are matched with the nut. When fixing the fixed part 1, the maximum torque requirement of the standard part 61 should not be exceeded, so as to avoid damaging the nut 61. It can be understood that the standard part 61 can also be other parts, for example, when the standard part 61 is a bolt, the connecting part 62 is a nut. In this embodiment, the sealing part 9 is a sealing rubber ring, but other sealing devices can also be used, which are not limited. The "first side" is the side of the sheet metal 7 of the vehicle on which the detection device is covered.

[0027] As shown in Figure 2 and Figure 3As shown, the fixed part 1 comprises a first cavity 12, and the hydraulic part 2 comprises a second cavity 21. The inner wall of the lower end of the hydraulic part 2 is provided with an internal thread, and the outer wall of the upper edge of the fixed part 1 is provided with an external thread matching the internal thread, and the pitch of the external thread is as small as possible to ensure the sealing between the threads. Thus, the hydraulic part 2 and the fixed part 1 are tightly connected through the threads. The top of the fixed part 1 is provided with at least one third through hole 11, and the first cavity 12 and the second cavity 21 are communicated through the third through hole 11. For example, the top of the fixed part 1 is provided with four arc-shaped through holes arranged uniformly in the circumferential direction. The number and shape of the through holes can be changed according to actual needs.

[0028] The piston 3 comprises a handle 31 and a plug 32, and the plug 32 is located in the second cavity 21 and can move up and down relative to the second cavity 21. The inner wall surface of the hydraulic part 2, the lower end surface of the plug and the first cavity 12 jointly form a sealed detection cavity, and the volume and shape of the detection cavity change with the movement of the piston. For example, when the piston moves to the bottom end of the second cavity 21, i.e. the upper end of the fixed part 1, the volume of the detection cavity is the smallest; when the piston moves to the top end of the second cavity, the volume of the detection cavity is the largest. The top end of the hydraulic part 2 is provided with a second through hole 23, and the size and shape of the second through hole 23 match the diameter of the handle 31, so that the handle 31 can pass through the second through hole 23 and be connected with the plug 32. The handle 31 is provided with an external thread, and the second through hole 23 is provided with an internal thread matching the external thread, so that the handle 31 can push the plug 32 into the second cavity 21 by rotating clockwise. The handle 31 is also provided with size marks, and the water pressure in the detection cavity can be calculated by the size of the handle 31 entering the hydraulic part 2. The maximum outer diameter of the plug 32 is consistent with the inner wall diameter of the second cavity 21, so that the sealing of the detection cavity can be ensured. The top end of the hydraulic part 2 is also provided with a first through hole 22 to make the gas flow out of or into the second cavity 21. Thus, during the movement of the piston 3, the pressure in the second cavity 21, except for the part of the detection cavity, can be balanced with the external pressure.

[0029] The water injection part 4 comprises a funnel 41, a water inlet pipe 42 and a valve 43. The hydraulic part 2 is provided with a water inlet 24. One end of the water inlet pipe 42 is connected to the water inlet 24, and the other end is connected to the funnel 41. The valve 43 is arranged at the position of the water inlet pipe 42 close to the water inlet 24. In addition, the funnel 41 can also be a water tank or other water storage device, and the present application does not limit this.

[0030] The lower end surface 321 of the piston head 32 is provided as an inclined surface, and the higher end is directed towards the water inlet 24 of the hydraulic part 2. If there is gas in the detection cavity, it is not convenient to estimate the water pressure in the detection cavity according to the size marks on the handle 31, because the gas is easy to be compressed. However, the lower end surface of the piston head 32 is provided as an inclined surface, so that the gas in the detection cavity can be easily discharged along the water injection port and the water can fill the entire detection cavity during the water injection process. Figure 5The dotted arrow in FIG. 7 and FIG. 8 indicates the direction, i.e. the outflow direction of the gas in the detection cavity during the water injection process.

[0031] Thus, the piston 3 can be moved to apply water pressure to the detection area of the standard part 61 to determine whether water leaks around the position of the standard part 61 on the second side opposite to the first side. If no water leaks after a period of time, it indicates that the sealing performance of the standard part 61 is good. The "second side" is the side opposite to the first side of the automobile sheet metal 7.

[0032] As shown in FIG. 9, in one embodiment, a water pressure gauge 11 can be arranged on the hydraulic part 2 to communicate with the detection cavity to accurately display the water pressure value in the detection cavity. Figure 4

[0033] As shown in FIG. 10, the installation and detection method of the detection device for detecting the sealing performance of the automobile standard part of the present application comprises: Figure 5

[0034] S1, the fixed part 1 sealing cover is arranged on the first side of the automobile sheet metal 7 and surrounds the detection area of the standard part 61, and then the fixed part 1 is fixed on the sheet metal 7 through the connecting part 62;

[0035] S3, the hydraulic part 2 is fixed with the fixed part 1 through the threads on the inner wall of the lower end of the hydraulic part 2;

[0036] S4, the handle 31 is connected to the plug 32 through the hydraulic part 2, and it is necessary to ensure that the plug 32 does not rotate with the handle 31 during installation;

[0037] S5, the plug 32 is placed at the bottom end of the second cavity 21, the funnel 41 is installed on the water inlet 24 through the water inlet pipe 42, and water is slowly injected;

[0038] S6, after the water is filled, it is still necessary to ensure that there is sufficient water in the funnel 41, the handle 31 is counterclockwise rotated to move the plug 32 upward to form a negative pressure in the detection cavity to suck the water in the funnel 41 into the detection cavity, and the valve 43 is closed when the plug 32 moves to the top end of the second cavity;

[0039] S7, the handle 31 is clockwise rotated to move the plug 32 downward to continuously compress the water in the detection cavity until the target pressure value is reached;

[0040] S8, a period of time is waited and it is observed whether water leaks around the position of the standard part 61 on the second side opposite to the first side, and if no water leaks, it is considered that the sealing performance of the standard part 61 is good;

[0041] S9, the plug 32 is moved to the top end of the second cavity to release the pressure in the detection cavity, the valve 43 is opened and the plug 32 is moved downward to discharge the water in the detection cavity to the funnel 41.​​

[0042] In step S1, when the standard part 61 is a nut, the connecting part 62 is a bolt, and the fixed part 1 is connected to the area on the side of the standard part 61 by the bolt passing through the nut. A sealing part 9 can be arranged between the fixed part 1 and the sheet metal 7, and the position of the sealing part 9 is as concentric as possible to the standard part 61, so that the standard part 61 is uniformly pressed. In addition, it should be noted that step S4 is only the installation process of the equipment, and it is not necessary to repeat the installation of the handle 31 to the plug 32 in the later test. It is ensured that the plug 32 does not rotate with the handle 31 during the installation process, so that the higher end of the lower end surface of the plug 32 after installation is inclined towards the water inlet 24 of the hydraulic part 2, and then it is ensured that when the plug 32 moves to the bottom of the second cavity 21, the higher end of the lower end surface is towards the water inlet 24 of the hydraulic part 2, so that the bubbles in the detection cavity can be smoothly discharged along the water inlet 24.

[0043] Therefore, the present application judges the sealing performance of the standard part by constructing a sealing detection cavity on the side of the automobile sheet metal in the area of the standard part, injecting water and applying pressure in the sealing detection cavity, and observing the water seepage on the other side of the automobile sheet metal at the position of the standard part. The detection method of the present application realizes the detection of the sealing performance of the standard part at the part level, and in the detection process, a certain water pressure can be applied to the standard part, so that it is closer to the situation when the water flow impacts the standard part in actual use. The operation is flexible and simple, the time consumption is short, and the cost is low.

[0044] The technical content and technical features of the present application have been disclosed above, but it is understood that under the creative idea of the present application, those skilled in the art can make various changes and improvements on the disclosed concepts, but all of them belong to the protection scope of the present application.

[0045] The above description of the embodiments is exemplary rather than limiting, and the protection scope of the present application is determined by the claims.

Claims

1. A detection device for detecting the sealing property of a standard part of an automobile, the standard part being fixed in an opening of a panel of the automobile, characterized in that, The detection device comprises: a sealing sleeve sealingly covering the detection area around the standard part on a first side of the automobile panel, the sealing sleeve comprising a fixed part and a hydraulic part, the fixed part being fixed to the detection area and delimiting a first cavity, the hydraulic part being sealingly connected with the fixed part and delimiting a second cavity in communication with the first cavity, and having a water inlet; a piston comprising a plug arranged in the sealing sleeve and a handle connected with the plug through a wall of the sealing sleeve, the plug having an inclined surface facing the end surface of the standard part, the inclined surface being away from the end of the standard part and facing the water inlet; and a water injection part in fluid communication with the inside of the sealing sleeve; wherein the detection device is configured to move the plug through the handle to apply water pressure to the detection area, so as to determine whether there is water leakage at the position of the standard part on a second side opposite to the first side.

2. The detection device of claim 1, wherein, The plug is arranged in the second cavity and matches the size of the second cavity, and the inner wall of the hydraulic part, the end surface of the plug facing the standard part and the first cavity jointly delimit a detection cavity with variable volume.

3. The detection device according to claim 2, wherein the fixed part is provided with a connecting hole, and a connecting part matching the standard part is connected with the standard part through the connecting hole, so as to fix the fixed part to the detection area.

4. The detection device according to claim 2, wherein the hydraulic part is provided with at least one first through hole, so as to allow gas to enter or exit the second cavity.

5. The detection device according to claim 2, wherein the hydraulic part comprises a second through hole matching the size of the handle, so as to allow the handle to pass through the second through hole and be connected to the plug, and the handle can be moved relative to the hydraulic part through the second through hole.

6. The detection device according to claim 5, wherein the handle is provided with a position mark, so as to calculate the water pressure value in the detection cavity according to the size of the handle extending into the hydraulic part.

7. The detection device according to claim 2, wherein the hydraulic part is provided with the water inlet, the water injection part is connected to the water inlet through a water inlet pipe, and the water inlet pipe is provided with a valve suitable for connecting or blocking the water injection part and the water inlet.

8. The detection device according to claim 2, further comprising a water pressure gauge connected with the hydraulic part to measure the water pressure in the detection cavity. comprising:

9. A method for detecting the tightness of a standard automotive part, characterized in that, providing a detection device for detecting the sealing performance of an automobile standard part according to any one of claims 1-8; arranging the plug in the sealing sleeve close to one side of the standard part, and making water enter the sealing sleeve through the water injection part; ​ When the sealing sleeve is filled with water, the plug is moved to the side of the sealing sleeve away from the standard part by the handle, so that the water in the water injection part is sucked into the sealing sleeve, and then the water injection part is blocked from the sealing sleeve; The plug is moved to the side of the sealing sleeve close to the standard part to apply water pressure to the detection area, and then it is observed whether water leaks at the position of the standard part on the second side opposite to the first side.

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