Improved sealing structure of engine cylinder cover

Abstract

The utility model discloses an improved sealing structure of an engine cylinder cover, which comprises a cylinder body, a sealing gasket is arranged at the top of the cylinder body, a cylinder cover main body is arranged at the top of the cylinder body and above the sealing gasket, and a locking mechanism is arranged in the cylinder cover main body. The locking mechanism comprises fixing rods, four fixing rods are fixedly connected to the top of the cylinder body, locking holes are formed in the inner sides of the fixing rods, four avoiding grooves are formed in the sealing gasket, four sliding grooves are formed in the cylinder cover body, the fixing rods are slidably connected with the sliding grooves, and the fixing rods are fixedly connected with the cylinder cover body. A sliding groove is formed in the cylinder cover body, a groove is formed in the side, close to the sliding groove, of the interior of the cylinder cover body, a spring is fixedly connected to the interior of the groove, and a locking rod is fixedly connected to the side, close to the sliding groove, of the spring. And the phenomenon that the bolt slips and the cylinder body is separated from the cylinder cover main body is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an improved sealing structure of an engine cylinder head. Background Art

[0002] An engine cylinder head is used to enclose a cylinder and form a combustion chamber. The side-valve engine cylinder head is cast with a water jacket, water inlet holes, water outlet holes, spark plug holes, bolt holes, combustion chambers, etc. The overhead-valve engine cylinder head has valve devices, intake and exhaust channels, etc. in addition to the cooling water jacket.

[0003] For example, the patent document with the application number 202120410864.6 discloses an improved sealing structure of an engine cylinder head. When connecting the cylinder block and the cylinder head, a sealing strip is placed inside the lower sealing slot, and then the cylinder head is placed on the top of the cylinder block. By rotating the bolt inside the upper nut, the bolt fixes and limits the position between the upper nut and the lower nut, so as to fix the cylinder head on the top of the cylinder block. Since there are two groups of lower sealing slots and upper sealing slots, a double-sealing effect will be formed at this time, greatly improving the sealing performance of the connection. The design is simple and practical. However, this structure only fixes the cylinder head and the cylinder block by the cooperation of bolts with upper nuts and lower nuts. Since this technology is prone to shaking during use, the bolts are prone to thread slipping, making the cylinder block and the cylinder head easy to separate.

[0004] In view of the above problems, we have developed an improved sealing structure of an engine cylinder head. Content of the Utility Model

[0005] The utility model discloses an improved sealing structure of an engine cylinder head, aiming to solve the technical problem that when the cylinder head and the cylinder block are fixed only by the cooperation of bolts with upper nuts and lower nuts, the bolts are prone to thread slipping, and then the cylinder block and the cylinder head are separated.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An improved sealing structure of an engine cylinder head, including a cylinder block, a sealing gasket is provided on the top of the cylinder block, and a cylinder head main body is installed above the sealing gasket on the top of the cylinder block. A locking mechanism is arranged inside the cylinder head main body;

[0008] The locking mechanism includes a fixed rod. Four fixed rods are fixedly connected to the top of the cylinder block. Locking holes are formed in the inner sides of the fixed rods. Four avoidance grooves are formed in the interior of the gasket. Four sliding grooves are formed in the interior of the cylinder head body. The fixed rods are slidably connected to the sliding grooves. A groove is formed in the interior of the cylinder head body and near one side of the sliding groove. A spring is fixedly connected to the interior of the groove. The side of the spring close to the sliding groove is fixedly connected to a locking rod. The locking rod is slidably connected to the locking hole. Limiting rods are fixedly connected to both the upper and lower sides of the gasket. Limiting grooves are formed in both the bottom of the cylinder head body and the top of the cylinder block. The limiting rods are slidably connected to the limiting grooves.

[0009] By arranging the locking rod inside the cylinder head body to insert into the locking hole on the fixed rod at the top of the cylinder block, the cylinder head body is made more stable above the cylinder block.

[0010] In a preferred solution, a plurality of second rectangular blocks are fixedly connected to both sides of the top of the cylinder block. Threaded holes are formed in both the first rectangular block and the second rectangular block. A bolt is threadedly connected to the interior of the threaded hole. A nut is threadedly connected to the outside of the bolt and below the second rectangular block.

[0011] By arranging a plurality of first rectangular blocks and second rectangular blocks on both sides of the top of the cylinder block and both sides of the bottom of the cylinder head body, then inserting the bolt into the threaded holes inside the first rectangular block and the second rectangular block to fix the cylinder head body and the cylinder block, and a nut is provided on the bolt for fastening.

[0012] In a preferred solution, a top cover is fixedly connected to the top of the cylinder head body. The top cover is of a hollow design.

[0013] By arranging the top cover, it is beneficial to protect the components exposed at the top of the cylinder head body.

[0014] In a preferred solution, a first through hole is formed in the interior of the cylinder head body. A second through hole is formed in the top of the cylinder head body and on one side of the top cover.

[0015] By arranging the first through hole and the second through hole to communicate with the high-temperature area inside the cylinder head body, it is beneficial to release the heat inside the cylinder head body.

[0016] In a preferred solution, the limiting grooves and the limiting rods have the same size, and the locking rods and the locking holes have the same shape and size.

[0017] By arranging the limiting grooves and the limiting rods to have the same size, the limiting rods can be placed more stably inside the limiting grooves.

[0018] In a preferred solution, the gasket is made of high-temperature resistant rubber, and the locking rod is slidably connected to the sliding groove.

[0019] By setting the material of the gasket as high-temperature resistant rubber, the gasket will not be affected by high temperature and its own characteristics will not be affected.

[0020] The improved sealing structure of the engine cylinder head provided by the utility model has the following advantages:

[0021] Place the gasket on the top of the cylinder block. At the same time, the fixing rod passes through the avoidance groove. Then place the cylinder head body downward on the top of the cylinder block and the gasket, so that the fixing rod aligns with the sliding groove and slides upward inside the sliding groove. At the same time, the top of the fixing rod pushes the locking rod to compress the spring. When the top of the fixing rod continues to move upward, the locking hole aligns with the locking rod, and the spring resets to drive the locking rod to insert into the inside of the locking hole, making the cylinder head body more stable above the cylinder block, and avoiding the phenomenon of the bolt slipping and the separation of the cylinder block and the cylinder head body. Description of the Drawings

[0022] Figure 1 It is an exploded three-dimensional schematic diagram of the improved sealing structure of the engine cylinder head proposed by the utility model.

[0023] Figure 2 It is an exploded three-dimensional schematic diagram of the improved sealing structure of the engine cylinder head proposed by the utility model.

[0024] Figure 3 It is a three-dimensional schematic diagram of the improved sealing structure of the engine cylinder head proposed by the utility model.

[0025] Figure 4 It is a partial three-dimensional schematic diagram of the improved sealing structure of the engine cylinder head proposed by the utility model.

[0026] Figure 5 It is a partial sectional three-dimensional schematic diagram of the improved sealing structure of the engine cylinder head proposed by the utility model.

[0027] Figure 6 It is of the improved sealing structure of the engine cylinder head proposed by the utility model Figure 5 Enlarged schematic diagram at A

[0028] In the drawings: 1. Cylinder block; 2. Cylinder head body; 3. Top cover; 4. Gasket; 5. Locking mechanism; 501. Fixing rod; 502. Locking hole; 503. Sliding groove; 504. Locking rod; 505. Spring; 506. Groove; 507. Limiting rod; 508. Limiting groove; 509. Avoidance groove; 6. First through hole; 7. First rectangular block; 8. Second rectangular block; 9. Bolt; 10. Nut; 11. Threaded hole; 12. Second through hole. Specific Embodiments

[0029] Next, in combination with the accompanying drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and marked in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but only represents the selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0030] The improved sealing structure of the engine cylinder head disclosed by the utility model is mainly applied to the scenario of closing the upper part of the cylinder to form a combustion chamber.

[0031] Refer to Figures 1-6 , the improved sealing structure of the engine cylinder head includes a cylinder block 1. A gasket 4 is provided at the top of the cylinder block 1. The gasket 4 is made of high-temperature resistant material. Above the gasket 4 and at the top of the cylinder block 1, a cylinder head main body 2 is installed. A locking mechanism 5 is arranged inside the cylinder head main body 2;

[0032] The locking mechanism 5 includes fixing rods 501. Four fixing rods 501 are fixedly connected to the top of the cylinder block 1. Locking holes 502 are respectively opened inside the fixing rods 501. Four avoiding grooves 509 are opened inside the gasket 4. Four sliding grooves 503 are opened inside the cylinder head main body 2. The fixing rods 501 are slidably connected with the sliding grooves 503. Inside the cylinder head main body 2 and close to one side of the sliding grooves 503, a groove 506 is opened. A spring 505 is fixedly connected inside the groove 506. The spring 505 is made of high-temperature resistant material, which is beneficial to prevent the spring 505 from losing elasticity at high temperature. One side of the spring 505 close to the sliding groove 503 is fixedly connected with a locking rod 504. The locking rod 504 is slidably connected with the locking hole 502. Limiting rods 507 are fixedly connected to both the upper and lower sides of the gasket 4. Limiting grooves 508 are respectively opened at the bottom of the cylinder head main body 2 and the top of the cylinder block 1. The limiting rods 507 are slidably connected with the limiting grooves 508.

[0033] Among them, a top cover 3 is fixedly connected to the top of the cylinder head main body 2. The top cover 3 is designed to be hollow. By providing the top cover 3, it is beneficial to protect the components exposed at the top of the cylinder head main body 2.

[0034] Among them, the limiting grooves 508 and the limiting rods 507 have the same size, and the locking rods 504 and the locking holes 502 have the same shape and size. By setting the limiting grooves 508 and the limiting rods 507 to have the same size, the limiting rods 507 can be placed more stably inside the limiting grooves 508.

[0035] Among them, the gasket 4 is made of high-temperature resistant rubber, and the locking rod 504 is slidably connected to the chute 503. By setting the gasket 4 to be made of high-temperature resistant rubber, the gasket 4 will not affect its own characteristics due to high temperature.

[0036] In this embodiment: Place the gasket 4 on the top of the cylinder block 1. At the same time, the fixing rod 501 passes through the avoidance groove 509, and then place the cylinder head body 2 downward on the top of the cylinder block 1 and the gasket 4, so that the fixing rod 501 aligns with the chute 503 and slides upward inside the chute 503. At the same time, the top of the fixing rod 501 pushes the locking rod 504 to compress the spring 505. When the top of the fixing rod 501 continues to move upward, the locking hole 502 aligns with the locking rod 504, and the spring 505 resets to drive the locking rod 504 to insert into the locking hole 502, making the cylinder head body 2 more stable above the cylinder block 1 and avoiding the phenomenon of the bolts 9 slipping and the cylinder block 1 separating from the cylinder head body 2.

[0037] In the above technical solution, considering the problem of the tight connection between the cylinder head body 2 and the cylinder block 1, to solve such problems, the specific operation is as follows:

[0038] Refer to Figure 1 and Figure 2 , in a preferred embodiment, a plurality of first rectangular blocks 7 are fixedly connected to both sides of the cylinder head body 2, a plurality of second rectangular blocks 8 are fixedly connected to both sides of the top of the cylinder block 1, threaded holes 11 are opened inside the first rectangular blocks 7 and the second rectangular blocks 8, bolts 9 are threadedly connected inside the threaded holes 11, and nuts 10 are threadedly connected to the outside of the bolts 9 and below the second rectangular blocks 8.

[0039] Among them, a first through hole 6 is opened inside the cylinder head body 2, and a second through hole 12 is opened on the top of the cylinder head body 2 and on one side of the top cover 3. The first through hole 6 and the second through hole 12 communicate with the high-temperature area inside the cylinder head body 2. By providing the first through hole 6 and the second through hole 12, it is beneficial to release the heat inside the cylinder head body 2.

[0040] In this embodiment: Insert the bolt 9 into the threaded hole 11 in the middle of the first rectangular block 7, and then rotate the bolt 9 so that the bottom of the bolt 9 passes through the threaded hole 11 inside the second rectangular block 8. Then pass the nut 10 through the bottom of the bolt 9 and rotate the nut 10 so that the nut 10 fixes the bolt 9. At the same time, the bolt 9 tightly fixes the cylinder head body 2 and the cylinder block 1, and forms a certain pressure to compress the gasket 4, so that a closed combustion chamber is formed between the cylinder head body 2 and the cylinder block 1.

[0041] Working principle: When in use, place the gasket 4 on the top of the cylinder block 1. At the same time, the fixing rod 501 passes through the avoidance groove 509. Then place the cylinder head body 2 downward on the top of the cylinder block 1 and the gasket 4, so that the fixing rod 501 aligns with the sliding groove 503 and slides upward inside the sliding groove 503. At the same time, the top of the fixing rod 501 pushes the locking rod 504 to squeeze the spring 505. When the top of the fixing rod 501 continues to move upward, the locking hole 502 aligns with the locking rod 504, and the reset of the spring 505 drives the locking rod 504 to insert into the inside of the locking hole 502, making the cylinder head body 2 more stable above the cylinder block 1. Then insert the bolt 9 into the threaded hole 11 in the middle of the first rectangular block 7, and then rotate the bolt 9 so that the bottom of the bolt 9 passes through the threaded hole 11 inside the second rectangular block 8. Then pass the nut 10 through the bottom of the bolt 9 and rotate the nut 10 so that the nut 10 fixes the bolt 9. At the same time, the bolt 9 tightly fixes the cylinder head body 2 and the cylinder block 1, and forms a certain pressure to squeeze the gasket 4, so that a closed combustion chamber is formed between the cylinder head body 2 and the cylinder block 1.

[0042] As described above, only the preferred specific implementation manner of the present invention is given, but the protection scope of the present invention is not limited thereto. The substitution may be the substitution of part of the structure, device, and method steps, or the substitution of the entire technical solution. Any equivalent substitution or change made according to the technical solution of the present invention and its inventive concept shall be covered within the protection scope of the present invention.

Claims

1. Improved sealing structure for engine cylinder head, including cylinder block (1), characterized in that A gasket (4) is provided at the top of the cylinder block (1), and a cylinder head body (2) is installed above the gasket (4) at the top of the cylinder block (1). A locking mechanism (5) is provided inside the cylinder head body (2). The locking mechanism (5) includes fixing rods (501). Four fixing rods (501) are fixedly connected to the top of the cylinder block (1). Locking holes (502) are formed inside the fixing rods (501). Four avoidance grooves (509) are formed inside the gasket (4). Four sliding grooves (503) are formed inside the cylinder head body (2). The fixing rods (501) are slidably connected to the sliding grooves (503). A groove (506) is formed inside the cylinder head body (2) near one side of the sliding grooves (503). A spring (505) is fixedly connected inside the groove (506). A locking rod (504) is fixedly connected to the side of the spring (505) near the sliding grooves (503). The locking rod (504) is slidably connected to the locking holes (502). Limiting rods (507) are fixedly connected to both the upper and lower sides of the gasket (4). Limiting grooves (508) are formed at the bottom of the cylinder head body (2) and the top of the cylinder block (1). The limiting rods (507) are slidably connected to the limiting grooves (508).

2. The improved sealing structure of the engine cylinder head according to claim 1, wherein, A plurality of first rectangular blocks (7) are fixedly connected to both sides of the cylinder head body (2). A plurality of second rectangular blocks (8) are fixedly connected to both sides of the top of the cylinder block (1). Threaded holes (11) are formed inside the first rectangular blocks (7) and the second rectangular blocks (8). Bolts (9) are threadedly connected inside the threaded holes (11). Nuts (10) are threadedly connected to the outside of the bolts (9) below the second rectangular blocks (8).

3. The improved sealing structure of the engine cylinder head according to claim 1, characterized in that, A top cover (3) is fixedly connected to the top of the cylinder head body (2). The top cover (3) is designed to be hollow.

4. The improved sealing structure of the engine cylinder head according to claim 1, characterized in that, A first through hole (6) is formed inside the cylinder head body (2). A second through hole (12) is formed at the top of the cylinder head body (2) on one side of the top cover (3).

5. The improved sealing structure of the engine cylinder head according to claim 1, characterized in that, The limiting grooves (508) and the limiting rods (507) have the same size and dimensions. The locking rods (504) and the locking holes (502) have the same shape and dimensions.

6. The improved sealing structure of the engine cylinder head according to claim 1, characterized in that, The gasket (4) is made of high-temperature resistant rubber. The locking rods (504) are slidably connected to the sliding grooves (503).

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