CN209761574U

CN209761574U - Engine timing cover

Info

Publication number: CN209761574U
Application number: CN201920389552.4U
Authority: CN
Inventors: 曹超; 尹子明; 张杏; 李天天
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2019-12-10
Anticipated expiration: 2029-03-26

Abstract

The utility model aims at providing a sealed effectual engine shroud in right time, including the shroud body, the left and right sides of shroud body is provided with the first flange limit that is used for being connected with the cylinder body, and the upper end of shroud body is provided with the second flange limit that is used for being connected with the lower bottom surface of cylinder cap, and the lower extreme of shroud body is provided with the third flange limit that is used for being connected with the top surface on the machine oil drain pan, and first flange limit is provided with the inclined plane with the junction of shroud body lateral wall, and the inclined plane constitutes the glue storage tank with the outer wall of cylinder body. The timing cover cap and the cylinder body are equal in height, the cylinder cover seals the timing cover cap and the upper top surface of the cylinder bottom together, the engine oil bottom case seals the timing cover cap and the lower bottom surface of the cylinder body together, the inclined planes between the first flange edges and the side walls on the two sides of the timing cover cap and the outer wall of the cylinder body form a glue storage groove for storing glue to seal the timing cover cap and the cylinder body, and therefore complete annular sealing is formed, and the sealing effect is good.

Description

Engine timing cover

Technical Field

The utility model relates to an automobile engine technical field, concretely relates to timing shroud structure of engine.

Background

The engine timing system transmission mode generally has three modes: belt drive, timing chain drive, and gear drive. For an engine driven by a timing chain, the timing chain needs continuous engine oil lubrication in the operation process, transmission parts are inevitably contacted, the lubricated engine oil can form oil mist to diffuse outwards, and in order to avoid pollution caused by the fact that the oil mist in the engine diffuses to the outside, a timing cover cap needs to be adopted to seal a cylinder body, a cylinder cover and an engine oil bottom shell. In the prior art, the timing cover is arranged on the periphery of the cylinder body, the cylinder cover and the engine oil bottom shell, and the timing cover is arranged on the upper portion of the cylinder cover and arranged on the lower portion of the engine oil bottom shell. Various vibrations are generated during the operation of the engine, and the temperature of the engine body components is also increased, accompanied by thermal expansion of the components, in which case the oil mist inside the engine may leak out from the gaps between the cylinder block, the cylinder head, and the timing cover. Therefore, a part capable of providing effective sealing effect is needed, but the traditional timing cover has large span of a sealing surface and great difficulty in realizing complete sealing.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an engine timing shroud that sealed effectual.

in order to realize the purpose, the utility model discloses a technical scheme be: the utility model provides an engine timing shroud, includes the shroud body, and the left and right sides of shroud body is provided with the first flange limit that is used for being connected with the cylinder body, and the upper end of shroud body is provided with the second flange limit that is used for being connected with the lower bottom surface of cylinder cap, and the lower extreme of shroud body is provided with the third flange limit that is used for being connected with the top surface on the machine oil pan, and the junction of first flange limit and shroud body lateral wall is provided with the inclined plane, and the inclined plane constitutes the glue storage tank with the outer wall of cylinder body.

In the scheme, the timing cover cap and the cylinder body are equal in height, the cylinder cover seals the timing cover cap and the upper top surface of the cylinder bottom together, the engine oil bottom shell seals the timing cover cap and the lower bottom surface of the cylinder body together, the inclined planes between the first flange edges and the side walls on the two sides of the timing cover cap and the outer wall of the cylinder body form the glue storage groove for storing glue, and the timing cover cap and the cylinder body are sealed, so that complete annular sealing is formed, and the sealing effect is good.

Drawings

Fig. 1 and 2 are schematic diagrams of the overall structure of the present invention;

Fig. 3 is a schematic view of the assembly state of the utility model;

Fig. 4 is a cross-sectional view of the first flanged side engaged with the cylinder block.

Detailed Description

As shown in fig. 1-4, an engine timing cover comprises a cover body 10, first flange edges 20 for connecting with a cylinder body B are arranged on the left side and the right side of the cover body 10, a second flange edge 30 for connecting with the lower bottom surface of a cylinder cover a is arranged at the upper end of the cover body 10, a third flange edge 40 for connecting with the upper top surface of an engine oil pan C is arranged at the lower end of the cover body 10, an inclined surface 21 is arranged at the joint of the first flange edge 20 and the side wall of the cover body 10, and the inclined surface 21 and the outer wall of the cylinder body B form a glue storage groove. The cover cap body 10 is equal to the front end of the cylinder body B in height, the first flange edges 20 on the left side and the right side of the cover cap body 10 are correspondingly matched with the mounting surface of the cylinder body B, the inclined surface 21 between the first flange edge 20 and the side wall and the outer wall of the cylinder body B form a glue storage groove for storing glue, silica gel is coated on the surface of the first flange edge 20 during mounting, the silica gel is extruded to extend to the periphery and enter the glue storage groove, the silica gel can be prevented from being extruded from the mounting surface and falling into an inner cavity of an engine, and meanwhile, the glue storage space is filled with the silica gel, so; the second flange edge 30 arranged at the top end of the timing cover cap is combined with the lower bottom surface of the cylinder cover A, and a sealing gasket is required to be arranged between the cylinder cover A and the cylinder body B in a cushioning mode, so that the sealing gasket is only required to be lengthened and extends to a position between the second flange edge 30 and the cylinder cover A to form sealing; a third flange 40 arranged at the bottom end of the timing cover cap is combined with the mounting surface of the engine oil bottom shell C, and a rubber pad is arranged in the middle of the timing cover cap to enhance the sealing effect; thereby forming complete annular seal with good sealing effect.

Further, a crank hole 50 is formed at the lower portion of the cover body 10, a step for mounting an oil seal is formed at the periphery of the crank hole 50, and a tooth jumping prevention structure 60 is formed at the inner periphery of the crank hole 50. The crankshaft hole 50 and the step jointly form an oil seal hole, the oil seal hole is formed by machining on the cover cap body 10, the oil seal hole is particularly sensitive to the roughness of the hole wall, and the requirement limit range must be met, so that the crankshaft hole 50 can meet the requirement that an oil seal is smoothly pressed in before a crankshaft, and the oil seal cannot be flushed out of the oil seal hole when an engine runs.

In order to prevent the chain from falling off, the anti-jumping tooth structure 60 is two arc-shaped baffles distributed around the center of the crankshaft sprocket, the radian of the baffles is consistent with the bending radian of the timing chain arranged at the position, and a clearance is reserved between the baffles and the timing chain.

The first flange edges 20 are provided with first mounting holes 22 at intervals, two first flange edges 20 are respectively provided with a positioning pin hole 23, one positioning pin hole 23 is arranged at the upper part of one first flange edge 20, and the other positioning pin hole 23 is arranged at the lower part of the other first flange edge 20. First mounting holes 22 are uniformly formed in the middle of the surface of the first flange edge 20, the distance between every two adjacent first mounting holes 22 is five times to ten times the diameter of the first mounting holes 22, the stress range after bolts are fastened can cover the area between every two first mounting holes 22, and the sealing effect is enhanced; because of the sealing requirement, the cover cap body 10 is very sensitive to positioning during installation, and the positioning pin hole 23 and the positioning pin arranged on the cylinder body B are in interference fit, so that the position accuracy during installation of the cover cap is enhanced.

Because silica gel has extremely strong bonding effect, the manpower is difficult to dismantle it during the dismantlement, and threaded hole 24 has been seted up with the outer wall of cylinder body B's oil duct D on the first flange limit 20 corresponding position department. Therefore, the cover cap body 10 can be separated from the mounting surface of the cylinder body B by the acting force generated by rotating the bolt against the outer wall of the oil passage D of the cylinder body B.

Further, the second flange 30 is provided with second mounting holes 31 at intervals for connecting with the lower end face of the cylinder head a, and the third flange 40 is provided with third mounting holes 41 at intervals for connecting with the upper end face of the oil pan C. The second flange edge 30 is provided with a second mounting hole 31 corresponding to the mounting hole of the cylinder cover A and used for mounting and connecting the cover cap and the cylinder cover A, and a cylinder gasket is arranged between the upper top surface of the second flange edge 30 and the lower bottom surface of the cylinder cover A to meet the sealing requirement. The third flange edge 40 is provided with a third mounting hole 41 corresponding to the mounting hole of the oil pan C and used for mounting and connecting the cover and the oil pan C, and a rubber pad is arranged between the lower bottom surface of the third flange edge 40 and the upper mounting surface of the oil pan C to meet the sealing requirement. It should be noted that the lower end face of the third flange edge 40 is higher than the lower bottom face of the cylinder B, when the oil pan C is mounted, the upper mounting face of the oil pan C is attached to the lower bottom face of the cylinder B, a mounting gap exists between the upper mounting face of the oil pan C and the lower end face of the third flange edge 40 of the cover cap, the mounting gap is about 0.1mm, and because the cover cap is expanded by heat in an engine working state, the mounting gap is reserved for a sufficient deformation allowance of the cover cap.

Claims

1. the utility model provides an engine timing shroud, includes shroud body (10), and the left and right sides of shroud body (10) is provided with first flange limit (20) that are used for being connected with cylinder body B, its characterized in that: the upper end of the cover cap body (10) is provided with a second flange edge (30) used for being connected with the lower bottom surface of the cylinder cover A, the lower end of the cover cap body (10) is provided with a third flange edge (40) used for being connected with the upper top surface of the engine oil bottom shell C, an inclined plane (21) is arranged at the joint of the first flange edge (20) and the side wall of the cover cap body (10), and the inclined plane (21) and the outer wall of the cylinder body B form a glue storage groove.

2. The engine timing cover as set forth in claim 1, wherein: a crankshaft hole (50) is formed in the lower portion of the cover cap body (10), steps for installing an oil seal are arranged on the periphery of the crankshaft hole (50), and an anti-jumping tooth structure (60) is arranged on the inner periphery of the crankshaft hole (50).

3. The engine timing cover as set forth in claim 2, wherein: the anti-jumping tooth structure (60) is two arc-shaped baffle plates distributed around the center of the crankshaft chain wheel, the radian of each baffle plate is consistent with the bending radian of the timing chain arranged at the position, and a clearance is reserved between each baffle plate and the timing chain.

4. The engine timing cover as set forth in claim 1, wherein: the first flange edges (20) are provided with first mounting holes (22) at intervals, two first flange edges (20) are respectively provided with a positioning pin hole (23), one positioning pin hole (23) is arranged at the upper part of the first flange edge (20) at one side, and the other positioning pin hole (23) is arranged at the lower part of the first flange edge (20) at the other side.

5. The engine timing cover as set forth in claim 4, wherein: and a threaded hole (24) is formed in the position, corresponding to the outer wall of the oil duct D of the cylinder body B, of the first flange edge (20).

6. The engine timing cover as set forth in claim 1, wherein: second mounting holes (31) used for being connected with the lower end face of the cylinder cover A are formed in the second flange edge (30) at intervals, and third mounting holes (41) used for being connected with the upper end face of the oil bottom shell C are formed in the third flange edge (40) at intervals.