Sealing device for air tightness test of aluminum flywheel casing

Abstract

The utility model provides a sealing device for an air tightness test of an aluminum flywheel casing, which relates to the field of sealing equipment for the air tightness test of flywheel casings and comprises a fixing assembly, a placing groove, a pressing rod, a mounting plate, a mounting roller, a pressing block, a spring, a rubber gasket, a heightening circular ring table, a limiting ring and a matching groove. According to the device, the defect that stress cannot be uniformly distributed on a shaft hole sealing surface due to excessive dependence on high-precision pressing point sealing before air tightness detection of the aluminum flywheel casing at present can be overcome, positive pressure can be generated in the shaft hole of the aluminum flywheel casing through mutual cooperation of all the components in the device, and the pressure direction is consistent with the axial direction of the hole; pressure is applied to the rubber gasket in the structure, so that the rubber gasket expands towards the outer side and extrudes the side wall of the shaft hole to achieve the sealing effect, the shaft hole can be stressed uniformly in the sealing process, pressure points are not fixed, and the sealing effect before airtightness detection of the aluminum flywheel shell is better.

Description

Technical Field

[0001] This utility model relates to the field of sealing equipment for testing the air tightness of flywheel housings, and more specifically, to a sealing device for testing the air tightness of aluminum flywheel housings. Background Technology

[0002] Currently, when using pressure testing equipment (specifically a differential pressure leak detector) to test the airtightness of aluminum flywheel housings, the flow of gas under the internal and external pressure difference is used to indicate whether there is a leak (the diaphragm of the differential pressure leak detector will fluctuate when there is a leak). However, before the airtightness test, a sealing device is needed to seal the two shaft holes of the aluminum flywheel housing.

[0003] Most existing sealing devices use compression sealing, but this has drawbacks: the traditional compression sealing method requires precise positioning of the compression point. Therefore, if the position of the compression point is deviated, the sealing surface of the shaft hole of the aluminum flywheel housing cannot be evenly stressed, which limits its use.

[0004] In conclusion, the sealing performance of aluminum flywheel housings before airtightness testing needs to be improved. Utility Model Content

[0005] The purpose of this invention is to solve the problems mentioned in the background art, and to propose a sealing device for testing the airtightness of aluminum flywheel housing.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A sealing device for testing the airtightness of an aluminum flywheel housing includes a fixing assembly, a placement groove, a clamping rod, a mounting plate, a mounting roller, a clamping block, a spring, a rubber washer, a raised annular platform, a limiting ring, and a mating groove.

[0008] The placement slot is provided on the fixed component, and the shape of the placement slot is adapted to the bottom cylinder mating surface of the aluminum flywheel housing;

[0009] Multiple clamping rods of different lengths are fixed on the fixing assembly, and two of the clamping rods are respectively located above the two shaft holes of the aluminum flywheel housing and connected to the mounting plate;

[0010] The mounting roller is fixed on the mounting plate and a spring is sleeved on the outside of the mounting roller. One end of the spring is connected to the mounting plate, and the other end of the spring is connected to a clamping block that slides with the mounting roller. A rubber gasket is provided on the clamping block.

[0011] Two raised circular platforms are fixed on the fixed assembly, and the two raised circular platforms pass through the two shaft holes of the aluminum flywheel housing respectively and are lower than the shaft holes;

[0012] The limiting ring is fixed on the raised circular platform, and the limiting ring is in contact with the inner wall of the rubber washer;

[0013] The groove is circumferentially formed on the clamping block and mates with the limiting ring.

[0014] Furthermore, the outer diameter of the rubber gasket is less than or equal to the diameter of the clamping block, and the diameter of the clamping block is less than the diameter of the aluminum flywheel housing shaft hole.

[0015] In the above scheme, when no force is initially applied to the rubber washer, there is a gap between the rubber washer and the inner wall of the shaft hole of the aluminum flywheel housing, which makes it convenient to put in and take out parts.

[0016] Furthermore, the fixing component includes a fixed plate, a hydraulic cylinder, and a movable plate. The fixed plate is provided with a placement groove and two raised circular platforms. The movable plate is connected to a hydraulic cylinder fixed on the frame, and several clamping rods of different lengths are fixed at the bottom of the movable plate. The fixed plate and the movable plate are distributed facing each other.

[0017] The above solution can quickly limit the orientation of the aluminum flywheel housing when it is placed by using a placement groove and a fixing component. At the same time, the pressure point is not fixed during the sealing process, so as long as it is subjected to downward pressure, the rubber gasket can be tightened to seal the side wall of the shaft hole of the aluminum flywheel housing.

[0018] Furthermore, a sealing rubber strip is provided in the placement groove to contact the bottom cylinder mating surface of the aluminum flywheel housing.

[0019] The above solution, by using a sealing rubber strip in the placement groove, can reduce wear between the fixed plate and the aluminum flywheel housing during placement.

[0020] Furthermore, the clamping block is made of nylon material.

[0021] In the above solution, the clamping block is made of nylon material, which makes it lighter and reduces wear between it and the aluminum flywheel housing shaft hole.

[0022] Furthermore, the two clamping blocks have different diameters, and the outer and inner diameters of the two raised annular platforms are different. The clamping blocks and raised annular platforms correspond one-to-one and are sized to seal the shaft holes of the two aluminum flywheel housings with different diameters.

[0023] Furthermore, a distance sensor is provided on the moving plate.

[0024] The above solution can detect the height difference between the moving plate and the fixed plate in real time during the sealing process using a distance sensor. When the height difference between the two reaches a preset value, the distance sensor sends a signal to the controller, which then controls the hydraulic cylinder to stop working, thereby preventing other clamping rods in contact with the surface of the aluminum flywheel housing from being excessively squeezed and causing deformation of the aluminum flywheel housing.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] Compared to existing technologies, this device solves the problem of over-reliance on high-precision pressure point sealing before airtightness testing of aluminum flywheel housings, which easily leads to uneven force distribution on the shaft hole sealing surface. Through the cooperation of various components in this device, positive pressure can be generated in the shaft hole of the aluminum flywheel housing. The pressure direction is consistent with the axis of the hole, applying pressure to the rubber gasket in this structure, causing it to expand outward and squeeze the side wall of the shaft hole to achieve a sealing effect. In this way, the shaft hole can be evenly stressed during the sealing process and the pressure point is not fixed, resulting in a better sealing effect before airtightness testing of the aluminum flywheel housing. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a schematic diagram of spring installation;

[0029] Figure 3 This is a schematic diagram of the placement slot;

[0030] Figure 4 A schematic diagram illustrating the working principle of an existing differential pressure leak detector;

[0031] Figure label:

[0032] 1. Fixed plate; 101. Placement groove; 2. Hydraulic cylinder; 3. Moving plate; 4. Pressing rod; 5. Mounting plate; 6. Mounting roller; 7. Pressing block; 8. Spring; 9. Rubber washer; 10. Elevating ring platform; 11. Limiting ring; 12. Mating groove. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0034] like Figures 1 to 3 As shown, a sealing device for testing the airtightness of an aluminum flywheel housing includes a fixing assembly, a placement groove 101, a clamping rod 4, a mounting plate 5, a mounting roller 6, a clamping block 7, a spring 8, a rubber washer 9, a raised annular platform 10, a limiting ring 11, and a mating groove 12.

[0035] The placement groove 101 is formed on the fixed component, and the shape of the placement groove 101 is adapted to the bottom cylinder joint surface of the aluminum flywheel housing (a further optimization of the solution is that a sealing rubber strip that contacts the bottom cylinder joint surface of the aluminum flywheel housing is provided in the placement groove 101).

[0036] Multiple clamping rods 4 of different lengths are fixed on the fixing assembly, and two of the clamping rods 4 are respectively located above the two shaft holes of the aluminum flywheel housing and connected to the mounting plate 5;

[0037] The mounting roller 6 is fixed on the mounting plate 5 and a spring 8 is sleeved on the outside of the mounting roller 6. One end of the spring 8 is connected to the mounting plate 5, and the other end of the spring 8 is connected to a pressing block 7 that slides with the mounting roller 6. A rubber gasket 9 is provided on the pressing block 7 (specifically, the pressing block 7 is made of nylon material).

[0038] Two raised circular platforms 10 are fixed on the fixed assembly, and the two raised circular platforms 10 pass through the two shaft holes of the aluminum flywheel housing respectively and are lower than the shaft holes;

[0039] The limiting ring 11 is fixed on the raised circular platform 10, and the limiting ring 11 is in contact with the inner wall of the rubber washer 9.

[0040] The groove 12 is circumferentially formed on the clamping block 7 and mates with the limiting ring 11.

[0041] Further refinements of the embodiments of this utility model, such as... Figure 1 As shown, the fixing assembly includes a fixed plate 1, a hydraulic cylinder 2, and a movable plate 3. The fixed plate 1 is provided with a placement groove 101 and two raised circular platforms 10. The movable plate 3 is connected to the hydraulic cylinder 2 fixed on the frame, and several clamping rods 4 of different lengths are fixed at the bottom of the movable plate 3 (the frame is not shown in the figure). The fixed plate 1 and the movable plate 3 are distributed facing each other.

[0042] In a further refinement of the embodiment of this utility model, the outer diameter of the rubber washer 9 is less than or equal to the diameter of the clamping block 7, and the diameter of the clamping block 7 is less than the diameter of the aluminum flywheel housing shaft hole.

[0043] In a further refinement of the embodiment of this utility model, the two clamping blocks 7 have different diameters, and the outer and inner diameters of the two raised annular platforms 10 are different. The clamping blocks 7 and the raised annular platforms 10 correspond one-to-one and are sized to seal the shaft holes of the two aluminum flywheel housings with different diameters respectively.

[0044] It should be noted that the hydraulic cylinder 2 is electrically connected to the controller, which is not shown in the figure, but can be installed on the frame on which the hydraulic cylinder 2 is mounted.

[0045] The working process of this utility model:

[0046] First, align the bottom of the aluminum flywheel housing with the cylinder mating surface and place it into the placement groove 101 to accurately define the placement position of the aluminum flywheel housing (the aluminum flywheel housing is shown in the figure but not labeled). Then, control the hydraulic cylinder 2 through the controller to make the moving plate 3 approach the fixed plate 1. At this time, the two rubber washers 9 will contact the two raised annular platforms 10 respectively, and the inner wall of the rubber washers 9 will contact the limiting ring 11 at the same time. The purpose of setting the raised annular platforms 10 is to make the rubber washers 9 move to the sealing height of the aluminum flywheel housing shaft hole. The limiting ring 11 can prevent the rubber washers 9 from expanding inward during the subsequent compression of the rubber washers 9.

[0047] As the moving plate 3 moves downward, the spring 8 is compressed and the mounting roller 6 moves downward. The mounting roller 6 slides with the clamping block 7 to provide guidance and prevent the clamping block 7 from shifting in the horizontal direction. At this time, the rubber washer 9 will expand outward (i.e. be flattened) and then completely fit with the shaft hole of the aluminum flywheel housing to effectively seal the shaft hole. It should be noted that initially, the rubber washer 9 and the shaft hole of the aluminum flywheel housing maintain a certain gap and do not contact each other.

[0048] After the rubber gasket 9 completes the sealing of the shaft hole, the hydraulic cylinder 2 stops working. At this time, the remaining clamping rods 4 contact other parts of the aluminum flywheel housing. Compressed air can then be introduced into the sealing cavity of the aluminum flywheel housing for airtightness testing. The procedure of using a differential pressure leak detector to test the airtightness of the aluminum flywheel housing is existing technology and this application does not make any improvements. Therefore, the working principle will not be elaborated. For details, please refer to the attached instruction manual. Figure 4 ;

[0049] After the air tightness test is completed, the hydraulic cylinder 2 drives the moving plate 3 to move upward. Then the device can be separated from the shaft hole and surface of the aluminum flywheel housing. At this time, the rubber gasket 9 returns to its initial size when it is not under force and its diameter becomes smaller. Finally, the aluminum flywheel housing is taken out from the placement groove 101 to complete one round of testing. Repeating the above process can carry out the subsequent production line sealing and air tightness testing process of the aluminum flywheel housing.

[0050] Compared to existing technologies, this device solves the problem of over-reliance on high-precision clamping point sealing before airtightness testing of aluminum flywheel housings, which easily leads to uneven force distribution on the shaft hole sealing surface. Through the cooperation of various components in this device, positive pressure can be generated in the shaft hole of the aluminum flywheel housing. The pressure direction is consistent with the axis of the hole, applying pressure to the rubber gasket 9 in this structure, causing it to expand outward and squeeze the side wall of the shaft hole, thereby achieving a sealing effect. The specific improvements are as follows:

[0051] (1) Before the compression, the rubber gasket 9 is not expanded, and the gap is large, making it convenient to put in and take out parts.

[0052] (2) The placement and positioning process of the aluminum flywheel housing is convenient through the placement groove 101. In addition, the sealing rubber strip reduces the wear between the fixed plate 1 and the aluminum flywheel housing during the placement process.

[0053] (3) The expansion sealing method is simple, and the pressure point position is not fixed and restricted, thus avoiding technical redundancy and waste. As long as it is subjected to downward pressure, the rubber gasket 9 can expand and seal the side wall of the shaft hole of the aluminum flywheel housing, thus achieving better sealing effect for the sealing process before the airtightness test of the aluminum flywheel housing.

[0054] In some embodiments, a distance sensor is provided on the moving plate 3, which is not shown in the figure. In this embodiment, the distance sensor can detect the height difference between the moving plate 3 and the fixed plate 1 in real time during the sealing process. When the height difference between the two reaches a preset value, the distance sensor feeds back a signal to the controller, and the controller controls the hydraulic cylinder 2 to stop working, thereby avoiding the situation where the other clamping rods 4 in contact with the surface of the aluminum flywheel housing are excessively squeezed, causing the aluminum flywheel housing to deform.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An air tightness test sealing device for an aluminum flywheel housing, characterized by, The fixed assembly, the placing groove (101), the pressing rod (4), the mounting plate (5), the mounting roller (6), the pressing block (7), the spring (8), the rubber ring (9), the high pad ring (10), the limiting ring (11) and the matching groove (12) are provided. The placing groove (101) is arranged on the fixed assembly and is matched with the shape of the bottom cylinder combined surface of the aluminum flywheel shell. The fixed assembly is provided with a plurality of pressing rods (4) of different lengths, and two of the pressing rods (4) are arranged above two shaft holes of the aluminum flywheel shell and are connected with the mounting plate (5). The mounting roller (6) is arranged on the mounting plate (5) and is sleeved with the spring (8) on the outside, one end of the spring (8) is connected with the mounting plate (5), the other end of the spring (8) is connected with the pressing block (7) which is in sliding fit with the mounting roller (6), and the rubber ring (9) is arranged on the pressing block (7). The fixed assembly is provided with two high pad rings (10), and the two high pad rings (10) pass through the two shaft holes of the aluminum flywheel shell and are lower than the shaft holes. The limiting ring (11) is arranged on the high pad ring (10) and is in contact with the inner wall of the rubber ring (9). The matching groove (12) is circumferentially arranged on the pressing block (7) and is matched with the limiting ring (11).

2. The air tightness test sealing device for an aluminum flywheel housing according to claim 1, characterized in that, The outer diameter of the rubber ring (9) is less than or equal to the diameter of the pressing block (7), and the diameter of the pressing block (7) is less than the diameter of the shaft hole of the aluminum flywheel shell.

3. The air tight test seal for an aluminum flywheel housing of claim 1 wherein, The fixed assembly includes a fixed plate (1), a hydraulic cylinder (2) and a movable plate (3), the fixed plate (1) is provided with the placing groove (101) and the two high pad rings (10), the movable plate (3) is connected with the hydraulic cylinder (2) arranged on the frame body, the bottom of the movable plate (3) is provided with a plurality of pressing rods (4) of different lengths, and the fixed plate (1) and the movable plate (3) are oppositely distributed.

4. The hermetic test seal for an aluminum flywheel housing of claim 1, wherein, The placing groove (101) is provided with a sealing rubber strip in contact with the bottom cylinder combined surface of the aluminum flywheel shell.

5. The hermetic test seal for an aluminum flywheel housing of claim 1, wherein, The pressing block (7) is made of nylon material.

6. The air tight test seal for an aluminum flywheel housing of claim 2, wherein, The diameters of the two pressing blocks (7) are different, the outer diameters and the inner diameters of the two high pad rings (10) are different, the pressing block (7) and the high pad ring (10) are one-to-one corresponding and size-matched to seal the two aluminum flywheel shell shaft holes with different diameters.

7. The air tight test seal for an aluminum flywheel housing of claim 3, wherein, The movable plate (3) is provided with a distance sensor.

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