CN210460884U

CN210460884U - Chain chamber cover

Info

Publication number: CN210460884U
Application number: CN201921181936.3U
Authority: CN
Inventors: 杨庆敖; 吴乃鹏; 姜恩伟; 韩令海; 宋建龙
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-05-05
Anticipated expiration: 2029-07-25

Abstract

The utility model discloses a chain chamber shroud belongs to engine technical field. The chain chamber cover comprises a cover body, a crankshaft mounting hole is formed in the cover body, an anti-jumping tooth part is arranged on the outer side of the crankshaft mounting hole, the anti-jumping tooth part is of an arc structure with the same axis as the crankshaft mounting hole, a crankshaft chain is arranged between a crankshaft chain wheel and the anti-jumping tooth part, and the anti-jumping tooth part covers the meshing section of the crankshaft chain and the crankshaft chain wheel; the cover cap body is of a V-shaped structure, and the crankshaft mounting hole and the anti-jumping tooth piece are arranged at the tip end of the V-shaped structure. The utility model discloses a setting up at the crankshaft mounting hole department of chain chamber shroud and preventing the tooth piece that jumps, effectively solved in the V type engine the problem of crankshaft chain taking place to jump the tooth with crankshaft sprocket meshing's in-process, ensured crankshaft chain's normal work, prolonged the life of engine.

Description

Chain chamber cover

Technical Field

The utility model relates to the technical field of engines, especially, relate to a chain chamber shroud.

Background

For a V-type engine, a chain chamber cover is usually designed to be a V-type structure, a crankshaft sprocket, a crankshaft chain, a timing sprocket and a timing chain are disposed in the chain chamber cover, the crankshaft sprocket is disposed on a crankshaft, the crankshaft chain is engaged with the crankshaft sprocket, and the timing chains on two sides of the V-type structure are driven to engage with the timing sprocket, so as to drive a camshaft to rotate. The crankshaft chain is influenced by the torsional vibration of the crankshaft, the load change is large, the phenomenon of tooth jumping is easily caused at the meshing position of the crankshaft chain wheel, the crankshaft cannot normally drive the timing chain to rotate, further, the intake and exhaust valves cannot be opened and closed at the correct phase position, the combustion of oil-gas mixture in a cylinder is influenced, the problems of engine shaking, abnormal increase of oil consumption, insufficient dynamic property and the like are caused, and the serious phase deviation can also cause the valve to prop up the cylinder, so that the engine is scrapped.

Accordingly, it is desirable to provide a chain chamber cover that solves the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a chain chamber shroud to solve among the prior art problem that the tooth phenomenon is jumped to the easy emergence of bent axle chain.

In order to realize the purpose, the following technical scheme is provided:

a chain chamber cover comprises a cover body, wherein a crankshaft mounting hole is formed in the cover body, an anti-jumping tooth part is arranged on the outer side of the crankshaft mounting hole, the anti-jumping tooth part is of an arc structure coaxial with the crankshaft mounting hole, a crankshaft chain is arranged between a crankshaft chain wheel and the anti-jumping tooth part, and the anti-jumping tooth part covers the meshing section of the crankshaft chain and the crankshaft chain wheel;

the cover cap body is of a V-shaped structure, and the crankshaft mounting hole and the anti-jumping tooth piece are arranged at the tip end of the V-shaped structure.

Preferably, the arc length of the anti-jumping tooth member is greater than or equal to the meshing length of the crankshaft sprocket and the crankshaft chain.

Preferably, the width of the anti-skip tooth piece along the axial direction of the crankshaft mounting hole is larger than the width of the crankshaft chain.

Preferably, the clearance between the crankshaft chain and the anti-jumping tooth piece ranges from 1.0 mm to 2.5 mm.

Preferably, the minimum thickness of the anti-jumping tooth piece is greater than or equal to 3 mm.

Preferably, a reinforcing rib is arranged between the anti-bouncing tooth piece and the cover body.

Preferably, the reinforcing rib is arranged on one side, away from the axis of the crankshaft mounting hole, of the anti-tripping gear piece.

Preferably, the reinforcing rib, the anti-jumping gear and the cover body are in smooth transition.

Preferably, the anti-jump tooth member is integrally formed with the cap body.

Preferably, the anti-jumping gear is fixedly connected with the cover body through a bolt.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a set up in the crankshaft mounting hole department of chain chamber shroud and prevent jumping the tooth structure, effectively solve in the V type engine crankshaft chain take place to jump the problem of tooth with crankshaft sprocket meshing's in-process, ensured crankshaft chain's normal work, prolonged the life of engine.

Drawings

FIG. 1 is a schematic view of a chain chamber cover according to an embodiment of the present invention;

fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Reference numerals:

1-a cover body; 11-crankshaft mounting holes; 12-camshaft mounting holes; 13-bolt fixings;

2-anti-jumping gear; and 3, reinforcing ribs.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 and fig. 2, the embodiment discloses a chain chamber cover, which specifically includes a cover body 1, a crankshaft mounting hole 11 is formed in the cover body 1, and a crankshaft is inserted into the crankshaft mounting hole 11; the crankshaft mounting hole 11 is a circular hole, the anti-jumping tooth part 2 is arranged on the outer side of the crankshaft mounting hole 11, the anti-jumping tooth part 2 is of an arc structure coaxial with the crankshaft mounting hole 11, a crankshaft chain is arranged between a crankshaft chain wheel and the anti-jumping tooth part 2, and the anti-jumping tooth part 2 covers the meshing section of the crankshaft chain and the crankshaft chain wheel; when the crankshaft chain is meshed with the crankshaft chain wheel to drive the timing chain to run, if the crankshaft chain has tooth jumping, the crankshaft chain can be contacted with the tooth jumping prevention piece 2, so that the crankshaft chain is prevented from jumping, and the phenomenon of tooth jumping is prevented. This embodiment sets up through crankshaft mounting hole 11 department at the chain room shroud and prevents jumping tooth spare 2, has effectively solved the problem that the crankshaft chain takes place to jump the tooth at the in-process with the meshing of crankshaft sprocket, has ensured the normal work of crankshaft chain, has prolonged the life of engine.

Further, the arc length of the anti-jumping gear 2 is larger than or equal to the meshing length of the crankshaft chain wheel and the crankshaft chain, so that once the crankshaft chain is meshed with the crankshaft chain wheel, the anti-jumping gear 2 can timely interfere and solve the problem of tooth jumping. Further, the width of the anti-jumping tooth piece 2 along the axis direction of the crankshaft mounting hole 11 is larger than that of the crankshaft chain, so that the crankshaft chain can be fully contacted with the anti-jumping tooth piece 2 when jumping out, and then the jumping out of the crankshaft chain is timely prevented. Further, when the crankshaft chain wound on the crankshaft chain wheel is in a tensioning state in normal use, the gap range between the crankshaft chain and the anti-jumping tooth piece 2 is set to be 1.0-2.5mm, the gap range can ensure that the anti-jumping tooth piece 2 does not interfere with the rotation of the crankshaft chain, the phenomenon of tooth jumping of the crankshaft chain can be prevented in time, and the continuous operation of the transmission process is kept. During concrete implementation, the radius size of the anti-jumping gear piece 2 is matched according to the radius of the crankshaft chain wheel and the thickness of the crankshaft chain, and only the gap between the crankshaft chain and the anti-jumping gear piece 2 needs to be ensured within the gap range. Further optionally, the minimum thickness of the anti-tripping gear 2 is greater than or equal to 3mm, wherein 3mm is preferred, which not only can ensure sufficient strength and anti-deformation capability, improve the structural stability of the anti-tripping gear 2, but also can reduce the weight of the anti-tripping gear 2 as much as possible, thereby reducing the weight of the whole chain chamber cover. Optionally, the thickness of the anti-jumping tooth 2 is gradually reduced along a direction away from the cover body 1, so as to increase the contact area between the anti-jumping tooth 2 and the cover body 1 and improve the connection stability.

The cover cap body 1 is of a shell structure, and the anti-jumping tooth part 2 is arranged on the inner side of the shell structure. Optionally, referring to fig. 2, a reinforcing rib 3 is disposed between the anti-trip gear 2 and the cover body 1 to provide sufficient supporting force for the anti-trip gear 2, so as to improve the stability of the anti-trip gear 2 disposed on the cover body 1 and avoid the looseness of the anti-trip gear 2 and the vibration noise that may occur in the loose condition. Further, a plurality of bolt fixing pieces 13 are arranged on the cover cap body 1, and threaded holes are formed in the bolt fixing pieces 13 so as to connect the cover cap body 1 with other structural parts of the engine through bolts; therefore, the anti-jump tooth part 2 is optionally connected with the bolt fixing part 13, and further optionally, the anti-jump tooth part 2 is also connected with the bolt fixing part 13 through the reinforcing rib 3. Further specifically, the crankshaft mounting hole 11 is disposed near the edge of the cover body 1, the bolt fixing member 13 is disposed at the edge of the cover body 1, and the reinforcing ribs 3 are disposed between the anti-jumping gear 2 and the bolt fixing member 13 and between the edges of the cover body 1. Further, the reinforcing rib 3 is arranged on one side of the anti-jumping tooth part 2 deviating from the axis of the crankshaft mounting hole 11, so that interference with a crankshaft chain is avoided. Optional strengthening rib 3 and prevent jumping one side mutually perpendicular that tooth spare 2 deviates from bent axle mounting hole 11 axle center to improve the support effect. Furthermore, smooth transition is realized between the anti-bouncing tooth part 2 and the reinforcing rib 3, between the anti-bouncing tooth part 2 and the bolt fixing part 13, and between the reinforcing rib 3 and the bolt fixing part 13 as well as between the reinforcing rib and the cover body 1, so that the stress concentration phenomenon is avoided.

As a structural member of the engine, the cover cap body 1 is integrally formed by adopting a die-casting process so as to ensure the integral strength of the cover cap body 1; in specific implementation, the optional anti-bouncing tooth part 2 is fixedly connected with the cover cap body 1 through bolt connection, welding or other connection modes, and the anti-bouncing tooth part 2 and the cover cap body 1 can also be integrally formed by adopting a die-casting process; the accuracy of preventing the tooth component 2 position on shroud body 1 can be ensured to the fashioned mode of integral type, improves simultaneously and prevents the joint strength of tooth component 2 and shroud body 1. Accordingly, the reinforcing bead 3 and the bolt mounting member 13 may be formed integrally with the bonnet body 1.

The chain chamber cover cap provided in the embodiment is mainly used in a V-type engine, and therefore, optionally, the cover cap body 1 is of a V-type structure, and the crankshaft mounting hole 11 and the anti-jumping tooth member 2 are both arranged at the tip end of the V-type structure, so that the crankshaft can simultaneously drive two pairs of timing chains on two sides of the V-type structure to rotate. Specifically, shroud body 1 is including being first shroud and the second shroud that the contained angle set up, and the crossing department of first shroud and second shroud is located to bent axle mounting hole 11 and anti-bouncing teeth spare 2, has all seted up camshaft mounting hole 12 on first shroud and the second shroud to installation camshaft is equipped with timing sprocket on the camshaft.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. The chain chamber cover is characterized by comprising a cover body (1), wherein a crankshaft mounting hole (11) is formed in the cover body (1), an anti-jumping tooth piece (2) is arranged on the outer side of the crankshaft mounting hole (11), the anti-jumping tooth piece (2) is of an arc structure coaxial with the crankshaft mounting hole (11), a crankshaft chain is arranged between the crankshaft chain wheel and the anti-jumping tooth piece (2), and the anti-jumping tooth piece (2) covers the meshing section of the crankshaft chain and the crankshaft chain wheel;

the cover cap body (1) is of a V-shaped structure, and the crankshaft mounting hole (11) and the anti-jumping tooth piece (2) are arranged at the tip of the V-shaped structure.

2. The chain chamber cover according to claim 1, wherein the arc length of the anti-skip tooth (2) is equal to or greater than the meshing length of the crankshaft sprocket and the crankshaft chain.

3. The chain chamber cover according to claim 2, wherein the width of the anti-backlash member (2) in the axial direction of the crankshaft mounting hole (11) is larger than the width of the crankshaft chain.

4. The chain chamber cover according to claim 1, characterized in that the clearance between the crankshaft chain and the anti-jump tooth element (2) ranges from 1.0 to 2.5 mm.

5. Chain chamber cover according to claim 1, characterized in that the minimum thickness of the anti-jump tooth (2) is equal to or greater than 3 mm.

6. Chain chamber cover according to claim 1, characterized in that a reinforcement rib (3) is provided between the anti-jump tooth (2) and the cover body (1).

7. The chain chamber cover according to claim 6, wherein the rib (3) is provided on the side of the anti-backlash member (2) facing away from the axial center of the crankshaft mounting hole (11).

8. Chain chamber cover according to claim 6, characterized in that the reinforcement (3) is in smooth transition with both the anti-jump tooth (2) and the cover body (1).

9. Chain chamber cover according to claim 1, characterized in that the anti-jump tooth (2) is integrally formed with the cover body (1).

10. Chain chamber cover according to claim 1, characterized in that the anti-jump tooth (2) is fixedly connected with the cover body (1) by means of bolts.