Improved sealing structure for valve chamber cover

Abstract

The utility model relates to the technical field of valve chamber cover sealing, in particular to an improved sealing structure for a valve chamber cover, a circle of sealing gasket is fixedly installed at the top end of a cylinder cover, a plurality of butt joint blocks are fixedly installed at the top end of the sealing gasket, and expansion particles are fixedly installed on the inner sides of the butt joint blocks. Expansion balls are arranged on the inner sides of the expansion particles, spring pieces are movably connected to the bottoms of the multiple expansion balls, limiting plates are fixedly installed at the lower ends of the multiple spring pieces, and the multiple limiting plates are fixedly connected to the top end of a sealing gasket. According to the improved sealing structure for the valve chamber cover, the spring piece can push and extrude the expansion ball to jack up, then the expansion ball can extrude the expansion particles to expand, extrude and enlarge the butt joint block to be connected with the texture groove, and the valve chamber cover is sealed and fixed through extrusion of the fixed expansion particles; the situation that the air bag cannot be sealed due to aging and breakage is avoided, and the sealing effect of the improved sealing structure for the valve chamber cover is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve cover sealing technology, specifically an improved sealing structure for valve cover. Background Technology

[0002] The valve cover, installed above the cylinder head, primarily prevents lubricating oil leakage from the valve rocker arm mechanism and prevents external dust from entering the cylinder and engine block. It also plays a significant role in ensuring the normal operation and service life of the crankshaft. While valve cover sealing strips currently on the market are inexpensive to use, their sealing performance is not guaranteed.

[0003] For example, the authorization notice number "CN215333164U" is titled "A Valve Cover Sealing Structure." Although this valve cover sealing structure uses an air inflator to inflate the expansion bladder, causing it to expand upwards and resist the deformation strip to raise its height, ensuring that both sides of the sealing gasket fully contact the cylinder head and valve cover, and maintaining a sealing effect even when the connection between the cylinder head and valve cover is loose and there are large gaps, there are still some issues. While the existing valve cover sealing structure uses an inflatable structure to fill the gaps in the valve cover to ensure sealing performance, the sealing structure's stability relies entirely on the inflation of the air bladder. Because the air bladder is a soft rubber structure, it will gradually age and crack over time. A cracked air bladder cannot inflate to seal the valve cover, and a leaking air bladder will contract and open the connection between the valve cover and the sealing structure, making the valve cover more prone to leakage. Ultimately, this results in a poor sealing effect for the valve cover sealing structure. Utility Model Content

[0004] The purpose of this invention is to solve the problem of poor sealing effect in the existing valve cover sealing structure, and to propose an improved sealing structure for valve covers.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an improved sealing structure for a valve cover, comprising a valve cover, a cylinder head, and a connecting ring. A sealing gasket is fixedly installed on the top of the cylinder head, and multiple mating blocks are fixedly installed on the top of the sealing gasket. Expansion particles are fixedly installed on the inner side of the multiple mating blocks, and expansion balls are provided on the inner side of the expansion particles. Spring plates are movably connected to the bottom of the multiple expansion balls, and limiting plates are fixedly installed on the lower ends of the multiple spring plates. The multiple limiting plates are fixedly connected to the top of the sealing gasket.

[0006] Preferably, the valve cover has a sealing plate on its inner side, and the sealing plate has multiple textured grooves fixedly formed on its inner side. The inner side of the multiple textured grooves is movably connected to the docking block. The lower end of the expansion ball is fixedly connected to a pull ring, which is movably connected to the lower end of the docking block.

[0007] Preferably, fixing blocks are fixedly installed on both sides of the valve cover, and multiple sealing gaskets are fixedly installed on the upper outer side of the cylinder head. The top ends of two of the sealing gaskets are movably connected to the fixing blocks, and bolts are threadedly connected to the top ends of the fixing blocks. The lower ends of the two bolts are threadedly connected to the sealing gaskets.

[0008] Preferably, the outer sides of the plurality of docking blocks are fixedly connected by an annular plate, and the top of the valve cover is fixedly connected with a plurality of positioning pins, the bottom ends of the plurality of positioning pins being fixedly connected to the top of the sealing plate.

[0009] Preferably, the connecting ring is fixedly sleeved on the outside of the cylinder head, the top of the cylinder head is movably connected to the valve cover, and vertical plates are provided on both sides of the valve cover, with the inner sides of the two vertical plates movably connected to the outer side of the cylinder head.

[0010] The improved sealing structure for valve cover proposed in this utility model has the following advantages: the spring plate pushes the expansion ball to lift it up, and then the expansion ball squeezes the expansion particles to expand and compress the mating block to form a connection with the textured groove. The fixed expansion particles are used to squeeze and fix the valve cover, avoiding the situation where the airbag cannot be sealed due to aging and rupture, thereby improving the sealing effect of the improved sealing structure for valve cover. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0012] Figure 2 for Figure 1 A frontal sectional view;

[0013] Figure 3 for Figure 2 Front view;

[0014] Figure 4 for Figure 2 Enlarged sectional view of section A in the middle;

[0015] Figure 5 for Figure 2 Enlarged sectional view of section B.

[0016] In the diagram: 1. Valve cover, 2. Cylinder head, 3. Connecting ring, 4. Sealing gasket, 5. Bolt, 6. Fixing block, 7. Vertical plate, 8. Textured groove, 9. Sealing plate, 10. Annular plate, 11. Spring plate, 12. Connecting block, 13. Expansion ball, 14. Pull ring, 15. Limiting plate, 16. Positioning pin, 17. Expansion particles. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Please see Figure 1-5 An improved sealing structure for a valve cover includes a valve cover 1, a cylinder head 2, and a connecting ring 3. A sealing gasket 4 is fixedly installed on the top of the cylinder head 2. The sealing ring 4 is supported by rubber and fixed around the top of the cylinder head 2. Multiple mating blocks 12 are fixedly installed on the top of the sealing gasket 4. Expansion particles 17, made of fine sand, are fixedly installed on the inner side of the multiple mating blocks 12. Expansion balls 13, made of iron metal spheres, are provided on the inner side of the expansion particles 17. Spring plates 11 are movably connected to the bottom of the multiple expansion balls 13. Limiting plates 15 are fixedly installed on the lower end of the multiple spring plates 11. The limiting plates 15 align the mating blocks 12 with the top of the cylinder head 2. After the valve cover 1 is fastened on top of the cylinder head 2, the mating blocks 12 and the upper textured grooves are aligned. 8. The spring plate 11 pushes the expansion ball 13 to rise and occupy more space inside the docking block 12. Then the expansion ball 13 will squeeze the expansion particle 13 to expand and compress the docking block 12 to form a connection with the textured groove 8. At this time, the sealing plate 9 will form a seal with the sealing gasket 4. Multiple limiting plates 15 are fixedly connected to the top of the sealing gasket 4. The valve cover 1 has a sealing plate 9 on the inside. Multiple textured grooves 8 are fixedly opened on the inside of the sealing plate 9. The inside of the multiple textured grooves 8 is movably connected to the docking block 12. Pulling the pull ring 14 can drive the expansion ball 13 to compress the spring plate 11 and squeeze downward to release the compression space of the expansion particle 17. The docking block 12 can be taken out inside the textured groove 8. The lower end of the expansion ball 13 is fixedly connected to the pull ring 14, and the pull ring 14 is movably connected to the lower end of the docking block 12.

[0019] The sealing ring 4 is fixed to the top of the cylinder head 2 with rubber support. The expansion particles 17 are made of fine sand, and the expansion ball 13 is made of iron metal spheres. The limiting plate 15 aligns the docking block 12 with the top of the cylinder head 2. After the valve cover 1 is placed on top of the cylinder head 2, the docking block 12 aligns with the textured groove 8 above. Then, the spring plate 11 pushes and squeezes the expansion ball 13 to lift up and occupy more space inside the docking block 12. Then, the expansion ball 13 squeezes the expansion particles 13 to expand and squeeze the docking block 12 to form a connection with the textured groove 8. At this time, the sealing plate 9 forms a seal with the sealing gasket 4. Pulling the pull ring 14 can drive the expansion ball 13 to compress the spring plate 11 and squeeze downward to release the compression space of the expansion particles 17. The docking block 12 can be removed from inside the textured groove 8. The fixed expansion particles squeeze and seal the valve cover 1, avoiding the situation where the airbag cannot be sealed due to aging and rupture, thereby improving the sealing effect of the valve cover with the improved sealing structure.

[0020] Please see Figure 1-5Fixed blocks 6 are fixedly installed on both sides of the valve cover 1. Multiple sealing gaskets 4 are fixedly installed on the upper outer side of the cylinder head 2. The tops of the two sealing gaskets 4 are movably connected to the fixed blocks 6. After the valve cover 1 and the cylinder head 2 are connected, the fixed blocks 6 are connected to the sealing gaskets 4. Tighten the bolts 5 to connect the sealing gaskets 4 and the fixed blocks 6. The top of the fixed blocks 6 is threaded with bolts 5, and the lower ends of the two bolts 5 are threadedly connected to the sealing gaskets 4.

[0021] Please see Figure 1-5 Multiple docking blocks 12 are fixedly connected to each other on the outside by annular plates 10. The annular plates 10 are made of highly elastic rubber, which can form a connection between multiple docking blocks 12 to enhance the firmness. Multiple positioning pins 16 are fixedly connected to the top of the valve cover 1. The positioning pins 16 can be manually pulled out and then drive the sealing plate 9 to move upward to change the height of the sealing plate 9. The bottom ends of the multiple positioning pins 16 are fixedly connected to the top of the sealing plate 9. The connecting ring 3 is fixedly sleeved on the outside of the cylinder head 2. The top of the cylinder head 2 is movably connected to the valve cover 1. Vertical plates 7 are provided on both sides of the valve cover 1. The vertical plates 7 can cover the gaps on both sides of the valve cover 1 and the cylinder head 2 to enhance the sealing effect. The inner sides of the two vertical plates 7 are movably connected to the outer sides of the cylinder head 2.

[0022] Working principle:

[0023] First, the sealing ring 4 is fixed to the top of the cylinder head 2 with rubber support. The expansion particles 17 are made of fine sand. The expansion ball 13 is made of iron metal spheres. The limiting plate 15 aligns the docking block 12 with the top of the cylinder head 2. After the valve cover 1 is fastened on the cylinder head 2, the docking block 12 aligns with the textured groove 8 above.

[0024] Then the spring plate 11 will push the extrusion ball 13 to rise and occupy more space inside the docking block 12. Then the extrusion ball 13 will squeeze the extrusion particle 13 to expand and enlarge the docking block 12 and form a connection with the texture groove 8. At this time, the sealing plate 9 will form a seal with the sealing gasket 4. Pulling the pull ring 14 can drive the extrusion ball 13 to compress the spring plate 11 and squeeze downward to release the extrusion space of the extrusion particle 17. The docking block 12 can be taken out from inside the texture groove 8.

[0025] Finally, after the valve cover 1 and cylinder head 2 are connected, the fixing block 6 is connected to the sealing gasket 4. Tighten the bolt 5 to connect the sealing gasket 4 and the fixing block 6. The annular piece 10 is made of highly elastic rubber, which can connect multiple mating blocks 12 to strengthen the firmness. The positioning pin 16 can be manually pulled out and then drive the sealing plate 9 to move upward to change the height of the sealing plate 9. The vertical plate 7 can cover the gaps on both sides of the valve cover 1 and cylinder head 2 to enhance the sealing effect.

[0026] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. An improved sealing structure for a valve cover, comprising a valve cover (1), a cylinder head (2) and a connecting ring (3), characterized in that: A sealing gasket (4) is fixedly installed on the top of the cylinder head (2). Multiple mating blocks (12) are fixedly installed on the top of the sealing gasket (4). Expansion particles (17) are fixedly installed on the inner side of the multiple mating blocks (12). Expansion balls (13) are provided on the inner side of the expansion particles (17). Spring plates (11) are movably connected to the bottom of the multiple expansion balls (13). Limiting plates (15) are fixedly installed at the lower end of the multiple spring plates (11). The multiple limiting plates (15) are fixedly connected to the top of the sealing gasket (4).

2. The improved seal structure for a valve cover as set forth in claim 1, wherein: The valve cover (1) has a sealing plate (9) on its inner side. The sealing plate (9) has multiple textured grooves (8) fixedly opened on its inner side. The inner side of the multiple textured grooves (8) is movably connected to the docking block (12). The lower end of the expansion ball (13) is fixedly connected to a pull ring (14), which is movably connected to the lower end of the docking block (12).

3. The improved seal structure for a valve cover as set forth in claim 1, wherein: Fixed blocks (6) are fixedly installed on both sides of the valve cover (1), and multiple sealing gaskets (4) are fixedly installed on the upper outer side of the cylinder head (2). The top ends of the two sealing gaskets (4) are movably connected to the fixed blocks (6), and the top ends of the fixed blocks (6) are threadedly connected to bolts (5). The lower ends of the two bolts (5) are threadedly connected to the sealing gaskets (4).

4. The improved seal structure for a valve cover as set forth in claim 1, wherein: The outer sides of the plurality of docking blocks (12) are fixedly connected by annular pieces (10), and the top of the valve cover (1) is fixedly connected with a plurality of positioning pins (16), and the bottom ends of the plurality of positioning pins (16) are fixedly connected to the top of the sealing plate (9).

5. The improved seal structure for a valve cover as set forth in claim 1, wherein: The connecting ring (3) is fixedly sleeved on the outside of the cylinder head (2). The top of the cylinder head (2) is movably connected to the valve cover (1). The valve cover (1) has vertical plates (7) on both sides. The inner sides of the two vertical plates (7) are movably connected to the outer side of the cylinder head (2).

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