CN212054846U

CN212054846U - Thrust structure of camshaft and have its engine assembly, car

Info

Publication number: CN212054846U
Application number: CN202020806856.9U
Authority: CN
Inventors: 滕云
Original assignee: BAIC Motor Powertrain Co Ltd
Current assignee: BAIC Motor Powertrain Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-12-01
Anticipated expiration: 2030-05-15

Abstract

The utility model provides a thrust structure of camshaft and have its engine assembly, car relates to car technical field. The thrust structure of the camshaft includes: a camshaft and a camshaft bearing cap; the camshaft bearing cover is provided with a thrust groove, and the thrust shoulder is accommodated in the thrust groove. The utility model discloses a camshaft axial thrust face of scheme engine arranges on camshaft bearing cap, has solved the problem that the camshaft needs axial positioning, simple structure, and easily processing is realized.

Description

Thrust structure of camshaft and have its engine assembly, car

Technical Field

The utility model relates to the field of automotive technology, in particular to thrust structure of camshaft and have its engine assembly, car.

Background

In order to limit the axial movement of the camshaft during operation or to withstand the axial forces generated by the bevel gears during transmission, the camshaft needs to be axially positioned. The axial movement of the camshaft is too large, and the camshaft driven by the bevel gear can influence the valve timing.

As shown in fig. 1, the overhead camshaft is usually axially positioned by means of two end faces of a camshaft bearing cap 101 or a cylinder head bearing bore and shoulders on both sides of the journal of the camshaft 102. The clearance value is 0.1mm to 0.2mm, which is the maximum axial movement of the camshaft 102.

As shown in FIG. 2, axial positioning of a medium and low profile camshaft typically employs a thrust plate, with an adjustment ring 201 interposed between the first camshaft journal and the camshaft timing gears, and a thrust plate 202 sleeved over the adjustment ring. The thrust plate is fixed to the front end face of the machine body by a bolt 203. The adjusting ring 201, the camshaft timing gear hub 2.4 and the first cam journal end face are tightly abutted together. Since adjustment ring 201 is 0.08mm to 0.02mm thicker than thrust plate 202, a gap of 0.02mm to 0.08mm is formed between thrust plate 202 and camshaft timing hub 204 or between thrust plate 202 and the end face of the first camshaft journal, which is the maximum axial displacement of the camshaft. The axial movement of the camshaft can be changed by changing the thickness of the adjusting ring 201.

A third axial positioning method is thrust screw positioning, as shown in fig. 3. When the thrust screw 302 is screwed into the position of the timing cover 301 corresponding to the front end of the camshaft and the distance between the end of the thrust screw 302 and the hexagonal head end surface of the timing gear fastening bolt 303 is 0.10mm to 0.2mm, the thrust screw 302 is locked, and the axial positioning of the camshaft can be realized.

The existing gasoline engine is commonly provided with an overhead camshaft, as shown in fig. 1, a thrust end face can be arranged on a camshaft bearing cover 101 or a cylinder cover; the thrust end face is usually arranged at the first gear, but may also be arranged at the last few gears. This design requires the camshaft 102 to be arranged with two shoulders to mate; however, sometimes, for reasons of installation space, only one shoulder can be arranged on the camshaft 102, which cannot be realized by the thrust of the two end faces of the camshaft bearing cap 101 and the cylinder head.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a thrust structure of camshaft and have its engine assembly, car for solve the camshaft at axial displacement or bear the axial force that bevel gear produced when the transmission, the camshaft needs axial positioning's problem.

In order to solve the technical problem, an embodiment of the utility model provides a following technical scheme:

a thrust structure of a camshaft, comprising: a camshaft and a camshaft bearing cap;

the camshaft bearing cover is provided with a thrust groove, and the thrust shoulder is accommodated in the thrust groove.

Optionally, both ends of the thrust shoulder are respectively provided with a first thrust end face and a second thrust end face, and both sides of the thrust groove are respectively provided with a first thrust face and a second thrust face.

Optionally, the first thrust end face and the first thrust face are adjacent and the second thrust end face and the second thrust face are adjacent.

Optionally, when the first thrust end face is engaged with the first thrust face, a gap is left between the second thrust end face and the second thrust face.

Optionally, when the second thrust end face is engaged with the second thrust face, a gap is left between the first thrust end face and the first thrust face.

Optionally, the camshaft bearing cap is connected with the cylinder head by bolts.

The embodiment of the utility model provides a still provide an engine assembly, including the cylinder head, still include as above the thrust structure of camshaft.

The embodiment of the utility model provides a still provide an automobile, include as above the engine assembly.

The utility model has the advantages that:

in the above aspect, the thrust structure of the camshaft includes: a camshaft and a camshaft bearing cap; the camshaft bearing cover is provided with a thrust groove, and the thrust shoulder is accommodated in the thrust groove. The utility model discloses a thrust structure of camshaft axle arranges on camshaft bearing cap, and only needs to set up a thrust convex shoulder, reduces and arranges the space, simple structure, and easily processing realizes, and the assembly is nimble, has solved the problem that the camshaft needs axial positioning.

Drawings

FIG. 1 shows a schematic axial positioning of an overhead camshaft;

FIG. 2 is a schematic axial positioning of the under and center camshafts;

FIG. 3 shows a schematic axial positioning of a camshaft;

fig. 4 is a front view of a thrust structure of a camshaft according to an embodiment of the present invention;

fig. 5 is a plan view of a thrust structure of a camshaft according to an embodiment of the present invention.

Description of reference numerals:

101-camshaft bearing caps; 102-a camshaft; 201-an adjustment ring; 202-a thrust plate; 203-bolt; 204-timing gear hub; 301-timing cover; 302-a thrust screw; 303-timing gear fastening bolts; 401-a cylinder head; 402-camshaft bearing caps; 403-thrust grooves; 404-a camshaft; 405-a thrust shoulder; 406-a first thrust surface; 407-a second thrust surface; 408-a first thrust end face; 409-a second thrust end face; 5010-bolt; 5011-locating pin.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

The utility model discloses to among the prior art axial force that camshaft produced when axial displacement or bearing the bevel gear transmission, the camshaft needs axial positioning's problem, provides a thrust structure of camshaft and has its engine assembly, car, realizes the axial positioning of camshaft.

As shown in fig. 4 to 5, an embodiment of the present invention provides a thrust structure of a camshaft, including: a camshaft 404 and a camshaft bearing cap 402;

a thrust shoulder 405 is arranged on the camshaft 404, a thrust groove 403 is arranged on the camshaft bearing cover 402, and the thrust shoulder 405 is accommodated in the thrust groove 403.

The utility model discloses an in this embodiment, the axial thrust face of camshaft 404 is arranged on camshaft bearing cap 402, and only need set up one the axial spacing of camshaft 404 can be realized to thrust shoulder 405, simple structure, the processing technology of thrust groove 43 easily realizes.

In an alternative embodiment of the present invention, the two ends of the thrust shoulder 405 are respectively provided with a first thrust end surface 408 and a second thrust end surface 409, and the two sides of the thrust groove 403 are respectively provided with a first thrust surface 406 and a second thrust surface 407.

In the embodiment of the present invention, the thrust groove 403 is a machined groove, and the first thrust end surface 408 and the second thrust end surface 409 of the first thrust surface 406, the second thrust surface 407 and the thrust shoulder 405 are machined surfaces. After the thrust groove 403 is assembled with the thrust shoulder 405, the thrust shoulder 405 is received within the thrust groove 403. Specifically, the first thrust face 408 is adjacent to the first thrust face 406, and the second thrust face 409 is adjacent to the second thrust face 407.

It should be noted that when the thrust shoulder 405 is received in the thrust groove 403, the thrust groove 403 is also provided with a gap that allows the thrust shoulder 405 to move axially therein and limits the axial movement of the thrust shoulder 405. When the first thrust face 408 is engaged with the first thrust face 406, a gap is left between the second thrust face 409 and the second thrust face 407, the size of the gap is 0.1mm to 0.2mm, and the gap is the maximum axial movement amount of the thrust shoulder 405, that is, the maximum axial movement amount of the camshaft 404.

When the second thrust face 409 is engaged with the second thrust face 407, a gap is left between the first thrust face 408 and the first thrust face 406, the size of the gap is 0.1mm to 0.2mm, and the gap is the maximum axial movement amount of the thrust shoulder 405, that is, the maximum axial movement amount of the camshaft 404.

In an alternative embodiment of the present invention, the camshaft bearing cap 402 is connected to the cylinder head 401 by bolts 5010.

As shown in fig. 5, according to the thrust structure of the camshaft 404 of the present invention, the two ends of the camshaft bearing cap 402 are respectively provided with a threaded hole, and the bolt 5010 is inserted into the threaded hole to connect the camshaft bearing cap 402 and the cylinder head 401. And, there are locating pin holes on the corresponding position of camshaft bearing cover 402 and cylinder head 401 separately, the locating pin 5011 is inserted in the said locating pin hole, the assembly of the auxiliary camshaft bearing cover 402 and cylinder head 401, guarantee the relative position precision of the two.

It should be noted that the assembly manner of the camshaft bearing cover 402 and the cylinder head 401 is flexible, the camshaft bearing cover 402 can be assembled on the cylinder head 401, and the camshaft bearing cover 402 can also be assembled on the cylinder head 401 in a reverse manner.

The embodiment of the utility model provides an engine assembly is still provided, including cylinder head 401, still include as above the thrust structure of camshaft 404.

The utility model discloses an in this embodiment, the engine assembly of the thrust structure of adoption camshaft 404 as above, only need set up a thrust shoulder 405, reduce and arrange the space, this thrust shoulder 405 cooperates with thrust groove 403 on the camshaft bearing cap 402, can realize the axial positioning of camshaft 404, thrust groove 403 and thrust shoulder 405's simple structure, and processing technology easily realizes. Moreover, the assembly mode of the thrust structure and the cylinder cover 401 is flexible, and the optional assembly scheme is increased.

The utility model discloses an in this embodiment, adopt the car of engine assembly as above, the axial thrust face of camshaft 404 among its engine assembly is arranged on camshaft bearing cap 402, simple structure, and processing technology easily realizes to the manufacturing degree of difficulty of whole car has been reduced.

The foregoing is directed to the preferred embodiments of the present invention, and it will be understood by those skilled in the art that various changes and modifications may be made without departing from the principles of the invention, and that such changes and modifications are intended to be included within the scope of the invention.

Claims

1. A thrust structure of a camshaft, comprising: a camshaft (404) and a camshaft bearing cap (402);

the camshaft bearing cover (402) is provided with a thrust groove (403), and the thrust shoulder (405) is accommodated in the thrust groove (403).

2. The thrust structure of a camshaft according to claim 1, wherein both ends of the thrust shoulder (405) are provided with a first thrust end face (408) and a second thrust end face (409), respectively, and both sides of the thrust groove (403) are provided with a first thrust face (406) and a second thrust face (407), respectively.

3. The thrust structure of a camshaft according to claim 2, wherein the first thrust end face (408) and the first thrust face (406) are adjacent, and the second thrust end face (409) and the second thrust face (407) are adjacent.

4. The thrust structure of a camshaft according to claim 2, wherein a gap is left between the second thrust end surface (409) and the second thrust surface (407) when the first thrust end surface (408) is engaged with the first thrust surface (406).

5. The thrust structure of a camshaft according to claim 2, characterized in that a gap is left between the first thrust end face (408) and the first thrust face (406) when the second thrust end face (409) is engaged with the second thrust face (407).

6. Thrust structure of a camshaft according to claim 1, characterized in that the camshaft bearing cap (402) is connected with the cylinder head (401) by means of bolts (5010).

7. An engine assembly comprising a cylinder head (401), characterized by further comprising a thrust structure of a camshaft according to any one of claims 1 to 6.

8. An automobile comprising the engine assembly of claim 7.