Flywheel shell air tightness detection device

Abstract

The application discloses a flywheel shell airtightness detection device and relates to the technical field of flywheel shell detection. The flywheel shell is blocked by the pressing plate of the plug mechanism and the large plug head at the bottom of the pressing plate, and the flywheel shell is pressed tightly by the pressing rod and the pressing head. When the detection is completed, the pressing rod and the pressing head continue to press the flywheel shell tightly, at which time the pressing plate and the large plug head are separated from the center hole of the flywheel shell. When the trigger plate on the pressing plate is in contact with the moving plate, the pressing rod and the pressing head are unlocked, and the pressing rod releases the flywheel shell, so that the problem that the flywheel shell is lifted and falls down to cause damage of the flywheel shell when the blocking piece is separated from the hole of the flywheel shell is avoided.

Description

Technical Field

[0001] This invention relates to the technical field of flywheel housing testing, and specifically to a flywheel housing airtightness testing device. Background Technology

[0002] The flywheel housing in a car connects the engine and transmission, bears part of the transmission's weight, and protects the clutch and flywheel. It is a crucial basic component. After production, the flywheel housing needs to undergo an airtightness test. During this test, a plug is used to seal the holes in the flywheel housing, ensuring a sealed state. Generally, the plug and the holes in the flywheel housing are interference fit. After the test, the plug needs to be separated from the holes. However, this process can cause the plug to lift the flywheel housing a certain distance and drop it, resulting in damage. Therefore, this problem needs to be addressed. Summary of the Invention

[0003] The purpose of this invention is to provide a flywheel housing airtightness testing device to overcome the above-mentioned defects in the prior art.

[0004] A flywheel housing airtightness testing device includes a workbench and a plugging mechanism. The workbench is provided with a circular positioning block that mates with the flywheel housing. The bottom of the workbench is provided with an inflation pipe that communicates with an inflation hole on the positioning block. The bottom of the workbench is also provided with a pressure gauge that communicates with a measuring hole on the positioning block. Each of the four corners of the workbench is provided with a column. The top of all the columns is fixed with the same top plate. The plugging mechanism is provided on the top plate and is used to seal the flywheel housing so that the flywheel housing is in a sealed state.

[0005] Preferably, the plugging mechanism includes a cylinder, a pressure plate, a spring, and a trigger assembly. The cylinder is mounted on the top plate, and the pressure plate is fixed to the end of its piston rod. A large plug head that mates with the center hole on the flywheel housing is provided at the center of the bottom of the pressure plate. A pressure rod is slidably connected to the top plate and the pressure plate. Two pressure rods on the same side are connected by a connecting plate. The spring is fitted onto the pressure rod and located between the top plate and the connecting plate. A pressure head is provided at the lower end of the pressure rod. A bottom groove that mates with the pressure head is provided on the pressure plate. Two trigger assemblies are provided and symmetrically arranged on the top plate for unlocking the pressure rod.

[0006] Preferably, the triggering assembly includes a limiting plate, a moving plate, and a second spring. The limiting plate is fixed to the bottom of the connecting plate and has a second driving inclined surface at one end. The moving plate is slidably connected to a guide rod at the bottom of the top plate. The second spring is sleeved on the guide rod. The top of the moving plate has a first driving inclined surface that cooperates with the second driving inclined surface. The middle of the moving plate has a slot that cooperates with the end of the limiting plate. The bottom of the moving plate has a first triggering inclined surface. The side of the pressure plate has a triggering plate, and one end of the triggering plate has a second triggering inclined surface that cooperates with the first triggering inclined surface.

[0007] Preferably, the large plug head is interference-fitted with the center hole on the flywheel housing.

[0008] Preferably, the inflation tube is equipped with a solenoid valve.

[0009] The present invention has the following advantages:

[0010] In use, this invention seals the flywheel housing using the pressure plate and the large plug at its bottom of the plugging mechanism, and presses the flywheel housing firmly using the pressure rod and pressure head. After the test is completed, the pressure rod and pressure head continue to press the flywheel housing firmly. At this time, the pressure plate and the large plug disengage from the center hole of the flywheel housing. When the trigger plate on the pressure plate contacts the moving plate, the pressure rod and pressure head are unlocked, and the pressure rod releases the flywheel housing. This prevents the flywheel housing from being lifted up and falling when the plug disengages from the hole of the flywheel housing, thus avoiding damage to the flywheel housing. Attached Figure Description

[0011] Figure 1 and Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention from different angles.

[0012] Figure 3 This is a schematic diagram of the structure of the present invention without the workbench installed.

[0013] Figure 4 This is a schematic diagram of the triggering component of the present invention.

[0014] Figure 5 This is a schematic diagram of the limiting plate of the present invention.

[0015] Figure 6 This is a schematic diagram of the pressure bar and pressure head of the present invention.

[0016] Figure 7 This is a schematic diagram of the structure of the pressure plate of the present invention.

[0017] Figure 8 This is a schematic diagram of the structure when the flywheel housing is installed according to the present invention.

[0018] The components are as follows: 1. Workbench; 2. Positioning block; 21. Inflation hole; 22. Inflation pipe; 23. Measuring hole; 24. Solenoid valve; 3. Pressure gauge; 4. Column; 5. Top plate; 6. Plug mechanism; 61. Cylinder; 62. Pressure plate; 63. Bottom groove; 64. Large plug; 65. Pressure rod; 66. Connecting plate; 67. Spring 1; 68. Pressure head; 69. Trigger assembly; 691. Limiting plate; 692. Drive ramp 1; 693. Moving plate; 694. Guide rod; 695. Spring 2; 696. Drive ramp 2; 697. Slot; 698. Trigger ramp 1; 699. Trigger plate; 6991. Trigger ramp 2; 7. Flywheel housing; 71. Center hole. Detailed Implementation

[0019] The following detailed description of the embodiments, with reference to the accompanying drawings, will further illustrate the specific implementation of the present invention, in order to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the concept and technical solutions of the present invention.

[0020] like Figure 1-8 As shown, the present invention provides a flywheel housing airtightness testing device, including a workbench 1 and a plugging mechanism 6. The workbench 1 is provided with a circular positioning block 2 that cooperates with the flywheel housing 7. The bottom of the workbench 1 is provided with an inflation pipe 22 that communicates with an inflation hole 21 on the positioning block 2. An electromagnetic valve 24 is provided on the inflation pipe 22. The bottom of the workbench 1 is also provided with a pressure gauge 3 that communicates with a measuring hole 23 on the positioning block 2. The four corners of the workbench 1 are respectively provided with columns 4. The top of all columns 4 is fixed with the same top plate 5. The plugging mechanism 6 is provided on the top plate 5 and is used to seal the flywheel housing 7 so that the flywheel housing 7 is in a sealed state.

[0021] It should be noted that the plugging mechanism 6 includes a cylinder 61, a pressure plate 62, a spring 67, and a trigger assembly 69. The cylinder 61 is mounted on the top plate 5, and the pressure plate 62 is fixed to the end of its piston rod. A large plug head 64 is provided at the center of the bottom of the pressure plate 62, which mates with the center hole 71 on the flywheel housing 7. The large plug head 64 is interference-fitted with the center hole 71 on the flywheel housing 7. A pressure rod 65 is slidably connected to the top plate 5 and the pressure plate 62. Two pressure rods 65 on the same side are connected by a connecting plate 66. The spring 67 is sleeved on the pressure rod 65 and located between the top plate 5 and the connecting plate 66. A pressure head 68 is provided at the lower end of the pressure rod 65. A bottom groove 63 that mates with the pressure head 68 is provided on the pressure plate 62. Two trigger assemblies 69 are provided and symmetrically arranged on the top plate 5 and are used to unlock the pressure rods 65.

[0022] Furthermore, the trigger assembly 69 includes a limiting plate 691, a moving plate 693, and a second spring 695. The limiting plate 691 is fixed to the bottom of the connecting plate 66 and has a second driving slope 696 at one end. The moving plate 693 is slidably connected to the guide rod 694 at the bottom of the top plate 5. The second spring 695 is sleeved on the guide rod 694. The top of the moving plate 693 has a first driving slope 692 that cooperates with the second driving slope 696. The middle of the moving plate 693 has a slot 697 that cooperates with the end of the limiting plate 691. The bottom of the moving plate 693 has a first trigger slope 698. The side of the pressure plate 62 has a trigger plate 699, and one end of the trigger plate 699 has a second trigger slope 6991 that cooperates with the first trigger slope 698.

[0023] Detailed implementation methods and principles:

[0024] In practical application, the flywheel housing 7 is placed on the workbench 1, and the positioning block 2 is positioned in the center hole 71 of the flywheel housing 7. The cylinder 61 is activated, and the piston rod of the cylinder 61 drives the pressure plate 62 and the pressure rod 65 to move downward. The spring 67 on the pressure rod 65 is compressed, and the driving inclined surface 696 of the limiting plate 691 presses the moving plate 693 through the driving inclined surface 692 on the moving plate 693. The moving plate 693 moves outward along the guide rod 694, and the spring 67 on the guide rod 694... When 695 is compressed, the large plug 64 below the pressure plate 62 is inserted into the center hole 71 of the flywheel housing 7 to seal it. At this time, the slot 697 on the moving plate 693 is aligned with the end of the limiting plate 691. Under the action of the spring force of the second spring 695, the moving plate 693 moves inward along the guide rod 694. The end of the limiting plate 691 is located in the slot 697 on the moving plate 693, which limits and fixes the pressure rod 65. The pressure head 68 at the lower end of the pressure rod 65 presses the flywheel housing 7 tightly. Next, the solenoid valve 24 on the inflation pipe 22 is opened to inflate the sealed space of the flywheel housing 7 to the set air pressure threshold. The air pressure gauge 3 detects the air pressure in the sealed space of the flywheel housing 7. When the air pressure gauge changes, it indicates that the flywheel housing 7 is leaking and fails the test. After the test is completed, the piston rod of the control cylinder 61 moves upward, driving the pressure plate 62 to move upward. The pressure head 68 of the pressure rod 65 continues to press the flywheel housing 7 tightly. The large plug 64 below the pressure plate 62 disengages from the center hole 71 of the flywheel housing 7, and the trigger plate on the pressure plate 62... The trigger ramp 6991 of 699 presses the moving plate 693 through the trigger ramp 698 on the moving plate 693. The spring 695 on the guide rod 694 is compressed, and the end of the limiting plate 691 disengages from the slot 697 on the moving plate 693. Under the action of the spring 67 on the pressure rod 65, the pressure rod 65 and the pressure head 68 move upward and reset, and the flywheel housing 7 is released. Then the flywheel housing 7 is removed from the positioning block 2 of the worktable 1, and the next flywheel housing 7 is replaced for air tightness testing.

[0025] In summary, the present invention uses the pressure plate 62 and the large plug 64 at the bottom of the plugging mechanism 6 to seal the flywheel housing 7, and uses the pressure rod 65 and the pressure head 68 to press the flywheel housing 7. After the test is completed, the pressure rod 65 and the pressure head 68 continue to press the flywheel housing 7. At this time, the pressure plate 62 and the large plug 64 disengage from the center hole 71 of the flywheel housing 7. When the trigger plate 699 on the pressure plate 62 contacts the moving plate 693, the pressure rod 65 and the pressure head 68 are unlocked, and the pressure rod 65 releases the flywheel housing 7. This avoids the problem that the flywheel housing 7 will be lifted up and fall when the plug disengages from the hole of the flywheel housing 7, causing damage to the flywheel housing 7.

[0026] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the present invention and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A flywheel housing airtightness testing device, characterized in that: The system includes a workbench (1) and a plugging mechanism (6). The workbench (1) is provided with a circular positioning block (2) that cooperates with the flywheel housing (7). The bottom of the workbench (1) is provided with an inflation pipe (22) that communicates with the inflation hole (21) on the positioning block (2). The bottom of the workbench (1) is also provided with a pressure gauge (3) that communicates with the measuring hole (23) on the positioning block (2). The four corners of the workbench (1) are respectively provided with columns (4). The top of all columns (4) is fixed with the same top plate (5). The plugging mechanism (6) is provided on the top plate (5) and is used to seal the flywheel housing (7) so that the flywheel housing (7) is in a sealed state. The plugging mechanism (6) includes a cylinder (61), a pressure plate (62), a spring (67), and a trigger assembly (69). The cylinder (61) is mounted on the top plate (5) and the pressure plate (62) is fixed to the end of its piston rod. A large plug (64) is provided at the center of the bottom of the pressure plate (62) to cooperate with the center hole (71) on the flywheel housing (7). A pressure rod (65) is slidably connected to the top plate (5) and the pressure plate (62). Two pressure rods (65) on the same side are connected by a connecting plate (66). The spring (67) is sleeved on the pressure rod (65) and located between the top plate (5) and the connecting plate (66). A pressure head (68) is provided at the lower end of the pressure rod (65). A bottom groove (63) is provided on the pressure plate (62) to cooperate with the pressure head (68). Two trigger assemblies (69) are provided and symmetrically arranged on the top plate (5) for unlocking the pressure rod (65). The trigger assembly (69) includes a limiting plate (691), a moving plate (693), and a second spring (695). The limiting plate (691) is fixed to the bottom of the connecting plate (66) and has a second driving slope (696) at one end. The moving plate (693) is slidably connected to the guide rod (694) at the bottom of the top plate (5). The second spring (695) is sleeved on the guide rod (694). The top of the moving plate (693) has a first driving slope (692) that cooperates with the second driving slope (696). The middle of the moving plate (693) has a slot (697) that cooperates with the end of the limiting plate (691). The bottom of the moving plate (693) has a first triggering slope (698). The side of the pressure plate (62) has a trigger plate (699). One end of the trigger plate (699) has a second triggering slope (6991) that cooperates with the first triggering slope (698). Place the flywheel housing (7) on the workbench (1) and position the positioning block (2) in the center hole (71) of the flywheel housing (7). Start the cylinder (61). The piston rod of the cylinder (61) drives the pressure plate (62) and the pressure rod (65) to move downward. The spring 1 (67) on the pressure rod (65) is compressed. The driving inclined surface 2 (696) of the limiting plate (691) presses the moving plate (693) through the driving inclined surface 1 (692) on the moving plate (693). The moving plate (693) moves outward along the guide rod (694). The spring 2 (695) on the guide rod (694) is compressed. When the large plug (64) under the pressure plate (62) is inserted into the center hole (71) of the flywheel housing (7) to seal the flywheel housing (7), the slot (697) on the moving plate (693) is aligned with the end of the limiting plate (691). Under the action of the spring force of the second spring (695), the moving plate (693) moves inward along the guide rod (694), and the end of the limiting plate (691) is located in the slot (697) on the moving plate (693), which limits and fixes the pressure rod (65). The pressure head (68) at the lower end of the pressure rod (65) presses the flywheel housing (7) tightly. Open the solenoid valve (24) on the air inlet pipe (22) to inflate the sealed space of the flywheel housing (7) to the set air pressure threshold. The air pressure gauge (3) detects the air pressure in the sealed space of the flywheel housing (7). When the air pressure gauge changes, it indicates that the flywheel housing (7) is leaking and unqualified. After the test is completed, the piston rod of the control cylinder (61) moves upward, driving the pressure plate (62) to move upward. The pressure head (68) of the pressure rod (65) continues to press the flywheel housing (7). The large plug (64) under the pressure plate (62) disengages from the center hole (71) of the flywheel housing (7). The trigger plate (699) on the pressure plate (62) The trigger ramp 2 (6991) of the moving plate (693) is pressed by the trigger ramp 1 (698) on the moving plate (693). The spring 2 (695) on the guide rod (694) is compressed, and the end of the limiting plate (691) is disengaged from the slot (697) on the moving plate (693). Under the action of the elastic force of the spring 1 (67) on the pressure rod (65), the pressure rod (65) and the pressure head (68) move upward and reset. The flywheel housing (7) is released. Then the flywheel housing (7) is removed from the positioning block (2) on the worktable (1), and the next flywheel housing (7) is replaced for air tightness testing.

2. The flywheel housing airtightness testing device according to claim 1, characterized in that: The large plug (64) is interference-fitted with the center hole (71) on the flywheel housing (7).

3. The flywheel housing airtightness testing device according to claim 1, characterized in that: The inflation tube (22) is equipped with a solenoid valve (24).

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