CN220353912U - Engine and automobile - Google Patents

Abstract

The utility model relates to the technical field of power machinery, and provides an engine and an automobile, wherein a camshaft cover is provided with a shaft hole which is a stepped hole; the bearing is arranged on the large-diameter section and comprises an outer ring and an inner ring, the outer ring is in interference fit with the large-diameter section, and one side end surface of the outer ring is abutted with the flange; the camshaft is rotationally connected with the camshaft cover, one end of the camshaft is provided with a shaft neck and a shaft shoulder, the shaft neck is in clearance fit with the inner ring, and the shaft shoulder is in abutting joint with one side end face of the inner ring along the axial direction; the phaser comprises an end cover, a stator and a rotor, wherein the stator is fixed with the end cover, the rotor is rotationally connected with the end cover and is coaxially fixed with the cam shaft, an abutting block is convexly arranged on the end face of the rotor, and the abutting block is axially abutted against the end face of the other side of the inner ring. The inner ring of the bearing is in clearance fit with the cam shaft, so that damage to the inner ring of the cam shaft in the inserting process of the cam shaft and the bearing can be reduced, the play of the ball bearing can not be influenced, and the service life of the ball bearing can not be further influenced.

Description

Engine and automobile

Technical Field

The utility model relates to the technical field of power machinery, in particular to an engine and an automobile.

Background

Conventionally, sliding friction is generated between the shaft journal of the camshaft and the shaft hole of the camshaft cover, and the friction work is large. In particular, the front end of the camshaft is subjected to a greater tension by the timing chain system than the other journals.

Therefore, the existing engine is provided with the ball bearing at the first journal of the camshaft, the friction mode at the first journal is changed from sliding friction to rolling friction, and the friction work of the camshaft can be obviously reduced, so that the oil consumption of the engine is reduced, and the thermal efficiency of the engine is improved.

In a common bearing installed on a camshaft cover, an outer ring of the bearing is in interference fit with the camshaft cover, an inner ring of the bearing is in interference fit with the shaft diameter of the camshaft, and the bearing is fixed by being subjected to radial clamping force.

However, in the mounting process, if a freezing assembly method is adopted, the cost is higher, if a pressure assembly method is adopted, the matching surfaces of the cam shaft and the inner ring are easy to damage in the inserting process of the cam shaft and the inner ring, and the inner ring and the outer ring are respectively subjected to opposite forces during assembly, so that the inner ring and the outer ring are dislocated, the play of the bearing is influenced, and the vibration, noise, temperature rise and fatigue life of the bearing are further influenced.

Therefore, an engine and an automobile are needed to solve the above technical problems.

Disclosure of Invention

The utility model aims to provide an engine, which can reduce damage to an inner ring of a bearing and influence on play in the process of splicing a cam shaft and the bearing.

To achieve the purpose, the utility model adopts the following technical scheme:

an engine, comprising:

the cam shaft cover is provided with a shaft hole, the shaft hole is a stepped hole, and a large-diameter section, a flange and a small-diameter section are sequentially arranged along the axial direction of the shaft hole;

the bearing is arranged on the large-diameter section, the bearing comprises an outer ring and an inner ring, the outer ring is in interference fit with the large-diameter section, and one side end surface of the outer ring is abutted against the flange;

the cam shaft is rotationally connected with the cam shaft cover, one end of the cam shaft is provided with a shaft neck and a shaft shoulder, the shaft neck is in clearance fit with the inner ring, and the shaft shoulder is in abutting joint with one side end face of the inner ring along the axial direction;

the phaser, the aforesaid phaser includes end cover, stator and rotor, the aforesaid stator is fixed with the aforesaid end cover, the aforesaid rotor rotates with the aforesaid end cover to be connected and with the coaxial fixedly of aforesaid camshaft, the terminal surface of the aforesaid rotor is protruding to be equipped with the butt piece, the aforesaid butt piece is in the opposite side terminal surface of the aforesaid inner circle along axial butt.

As a preferable embodiment of the engine, the contact block is annular and is provided coaxially with the rotor.

As a preferable embodiment of the engine, the rotor is provided with a plurality of abutment blocks, and the plurality of abutment blocks are arranged at intervals and uniformly around the axis of the rotor.

As a preferable mode of the engine, the rotor and the camshaft are fixed by a fastener, the camshaft is provided with a threaded hole along an axis, and the fastener is inserted into the threaded hole after passing through the end cover and the rotor in an axial direction, and is screwed with the camshaft.

As a preferable technical scheme of the engine, the fastening piece is an engine oil control valve bolt and comprises an oil inlet cavity and an adjusting cavity, the cam shaft is provided with an oil inlet channel, the oil inlet channel is communicated with the oil inlet cavity, a one-way valve is arranged between the oil inlet cavity and the adjusting cavity, and the one-way valve is configured to allow oil to flow unidirectionally from the oil inlet cavity to the adjusting cavity.

As a preferable embodiment of the engine, the bearing is a ball bearing, a sliding groove is formed between the inner ring and the outer ring, a plurality of balls are provided in the sliding groove, and the plurality of balls are rotated relative to the inner ring and/or the outer ring.

As a preferable technical scheme of the engine, the bearing further comprises a retainer, a plurality of mounting holes are formed in the retainer along the circumferential direction of the retainer, and the balls are placed in one-to-one correspondence with the mounting holes.

As a preferable mode of the engine, a lubrication oil passage is formed between the camshaft cover and the camshaft, the flange of the camshaft cover is provided with a relief groove, and the sliding groove is communicated with the lubrication oil passage through the relief groove.

An automobile is also provided, comprising the engine.

As a preferable technical scheme of the automobile, the automobile further comprises a timing chain system, wherein the timing chain system comprises a chain, the phaser further comprises a sprocket, the sprocket is coaxially fixed with the rotor, and the sprocket is in transmission connection with the chain.

The utility model has the beneficial effects that:

in the assembly process of the engine, the bearing is pressed into the shaft hole of the camshaft cover, the bearing is positioned on the large-diameter section of the shaft hole, the outer peripheral wall of the outer ring of the bearing is in interference fit with the inner peripheral wall of the large-diameter section, the camshaft cover fixes the outer ring of the bearing through radial extrusion force, and the end face of the outer ring, facing one side of the camshaft cover, is abutted against the flange, so that the outer ring of the bearing is fixed. The camshaft inserts the camshaft shroud from the minor diameter section in shaft hole, and the major diameter section of camshaft is located the minor diameter section in shaft hole, and the minor diameter section of camshaft inserts in the inner circle of bearing to with its clearance fit, the shoulder of camshaft is along axial butt in one side terminal surface of bearing inner circle. And finally, coaxially fixing the phaser rotor and the cam shaft, wherein an abutting block protruding from the rotor abuts against the end surface of the other side of the bearing inner ring along the axial direction, so that the shaft shoulder of the cam and the abutting block of the rotor complete clamping and fixing the bearing inner ring along the axial direction.

So set up, the outer lane of bearing and camshaft shroud interference fit, and its one side has flange axial spacing, easy to assemble, the inner circle and the camshaft clearance fit of bearing accomplish the inner circle of bearing along axial centre gripping fixedly through the abutment piece of the shoulder of cam and rotor, can reduce camshaft and bearing grafting in-process to the damage of its inner circle to can not influence ball bearing's play, and then can not influence ball bearing's noise, vibration and life.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic view of an engine according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a camshaft cover provided by an embodiment of the present utility model;

FIG. 3 is a schematic view of a bearing according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a bearing provided by an embodiment of the present utility model;

FIG. 5 is a schematic view of a camshaft according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of a rotor according to an embodiment of the present utility model.

In the figure:

10. a camshaft cover; 11. a shaft hole; 111. a large diameter section; 112. a flange; 113. a small diameter section; 114. an avoidance groove;

20. a bearing; 21. an outer ring; 22. an inner ring; 23. a sliding groove; 24. a ball; 25. a retainer;

30. a cam shaft; 31. a journal; 32. a shaft shoulder; 33. a threaded hole; 34. an oil inlet passage;

41. an end cap; 42. a stator; 43. a rotor; 431. an abutment block; 432. a sprocket;

50. an engine oil control valve bolt.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 to 6, the present application provides an engine including a camshaft cover 10, a bearing 20, a camshaft 30, and a phaser 43. The camshaft cover 10 is provided with a shaft hole 11, the shaft hole 11 is a stepped hole, and a large-diameter section 111, a flange 112 and a small-diameter section 113 are sequentially arranged along the axial direction of the shaft hole; the bearing 20 is mounted on the large-diameter section 111, the bearing 20 comprises an outer ring 21 and an inner ring 22, the outer ring 21 is in interference fit with the large-diameter section 111, and one side end surface of the outer ring 21 is abutted against the flange 112; the camshaft 30 is rotationally connected with the camshaft cover 10, one end of the camshaft 30 is provided with a shaft neck 31 and a shaft shoulder 32, the shaft neck 31 is in clearance fit with the inner ring 22, and the shaft shoulder 32 is in abutting joint with one side end surface of the inner ring 22 along the axial direction; the phaser comprises an end cover 41, a stator 42 and a rotor 43, wherein the stator 42 is fixed with the end cover 41, the rotor 43 is rotationally connected with the end cover 41 and is coaxially fixed with the cam shaft 30, an abutting block 431 is convexly arranged on the end face of the rotor 43, and the abutting block 431 is axially abutted against the end face of the other side of the inner ring 22.

The camshaft cover 10 is provided with a shaft hole 11, the bearing 20 is a stepped hole, a large-diameter section 111 is formed on the outer side end surface of the camshaft cover 10 along the axial direction of the shaft hole 11, a small-diameter section 113 is formed on the inner side end surface, the large-diameter section 111 and the small-diameter section 113 are coaxially arranged, a flange 112 is formed at the connecting position of the large-diameter section 111 and the small-diameter section 113 due to the change of the aperture, and the flange 112 is in a circular ring shape and provides axial limit for the outer ring 21 of the bearing 20. The camshaft 30 is rotatably connected to the camshaft cover 10 via the bearing 20, thereby reducing frictional losses at the connection. The end of the cam shaft 30 is in a ladder shape, a small diameter section of the cam shaft forms a shaft neck 31, a connecting position of a large diameter section and the small diameter section forms a shaft shoulder 32, one side of the inner ring 22 of the bearing 20 is provided with axial limit, and a rotor 43 of the phaser is convexly provided with an abutting block 431 for abutting against the axial end face of the other side of the inner ring 22 of the bearing 20.

In the assembly process of the engine, the bearing 20 is pressed into the shaft hole 11 of the camshaft cover 10, the bearing 20 is located on the large-diameter section 111 of the shaft hole 11, the outer peripheral wall of the outer ring 21 of the bearing 20 is in interference fit with the inner peripheral wall of the large-diameter section 111, the camshaft cover 10 fixes the outer ring 21 of the bearing 20 through radial extrusion force, and the end face of the outer ring 21, facing to one side of the camshaft cover 10, is abutted against the flange 112, so that the outer ring 21 of the bearing 20 is fixed. The camshaft 30 is inserted into the camshaft cover 10 from the small diameter section 113 of the shaft hole 11, the large diameter section of the camshaft 30 is positioned at the small diameter section 113 of the shaft hole 11, the small diameter section of the camshaft 30 is inserted into the inner ring 22 of the bearing 20 and is in clearance fit with the inner ring 22 of the bearing 20, and the shoulder 32 of the camshaft 30 is abutted against one side end face of the inner ring 22 of the bearing 20 in the axial direction. Finally, the end cover 41 of the phaser is fixed with the camshaft cover 10, the rotor 43 is coaxially fixed with the camshaft 30, the abutting block 431 protruding from the rotor 43 is axially abutted against the other end face of the inner ring 22 of the bearing 20, and thus, the shaft shoulder 32 of the cam and the abutting block 431 of the rotor 43 complete clamping and fixing of the inner ring 22 of the bearing 20 in the axial direction.

So set up, the outer lane 21 of bearing 20 and camshaft shroud 10 interference fit, and its one side has flange 112 axial spacing, easy to assemble, the inner circle 22 of bearing 20 and camshaft 30 clearance fit, accomplish the centre gripping of inner circle 22 along axial of bearing 20 through the abutment piece 431 of the shoulder 32 of cam and rotor 43 and fix, can reduce camshaft 30 and bearing 20 grafting in-process, damage to its inner circle 22 to can not influence ball bearing's play, and then can not influence ball bearing's noise, vibration and life.

Optionally, the abutment block 431 is annular and is disposed coaxially with the rotor 43.

In other embodiments, the rotor 43 is provided with a plurality of abutment blocks 431, and the plurality of abutment blocks 431 are spaced and uniformly arranged around the axis of the rotor 43. Thus, the processing of the abutting block 431 is facilitated, and the processing precision requirement of the abutting block 431 is reduced.

Alternatively, the end cap 41 is fixed to the camshaft 30 by a fastener, and the camshaft 30 is provided with a threaded hole 33 along the axis, and the fastener is inserted into the threaded hole 33 to be screwed to the camshaft 30 after passing through the end cap 41 and the rotor 43 in the axial direction. The arrangement is that the camshaft 30 and the rotor 43 are fixed through the fastener, the structure is simple, the installation is convenient, the feeding amount is adjusted through screwing the fastener, the distance between the abutting block 431 and the shaft shoulder 32 is changed, and then the axial clamping force to the inner ring 22 of the bearing 20 is changed.

Optionally, the fastener is an engine oil control valve bolt 50, and includes an oil inlet cavity and an adjusting cavity, the camshaft 30 is provided with an oil inlet channel 34, the oil inlet channel 34 is communicated with the oil inlet cavity, a one-way valve is disposed between the oil inlet cavity and the adjusting cavity, and the one-way valve is configured to allow the oil to circulate unidirectionally from the oil inlet cavity to the adjusting cavity. So set up, restrict the fluid flow direction through the check valve for the fluid in the regulation chamber can't flow backward back into the oil feed chamber and then return to the oil feed passageway 34 that the camshaft 30 offered.

Optionally, the bearing 20 is a ball bearing, a sliding groove 23 is formed between the inner ring 22 and the outer ring 21, and a plurality of balls 24 are disposed in the sliding groove 23, and the plurality of balls 24 rotate relative to the inner ring 22 and/or the outer ring 21.

Optionally, the bearing 20 further includes a cage, and the cage is provided with a plurality of mounting holes along a circumferential direction thereof, and the balls 24 are disposed in one-to-one correspondence with the mounting holes. By this arrangement, the balls 24 in the ball bearing can be uniformly distributed between the inner ring 22 and the outer ring 21 by the cage.

Optionally, a lubrication oil path is formed between the camshaft cover 10 and the camshaft 30, the flange 112 of the camshaft cover 10 is provided with a relief groove 114, and the sliding groove 23 is communicated with the lubrication oil path through the relief groove 114. The camshaft cover 10 is rotationally connected with the camshaft 30, a gap exists between the camshaft cover 10 and the camshaft 30, a lubrication oil path is formed, and the balls 24 in the sliding grooves 23 are communicated with the lubrication oil path through the avoidance grooves 114, so that lubrication oil can provide lubrication for the bearings 20.

An automobile is also provided, comprising the engine.

The vehicle further comprises a timing chain system comprising a chain, the phaser further comprising a sprocket 432, the sprocket 432 being fixed coaxially with the rotor 43, the sprocket 432 being in driving connection with the chain. The rotor 43 and the cam shaft 30 are rotated by the chain.

Furthermore, the foregoing description of the preferred embodiments and the principles of the utility model is provided herein. It will be understood by those skilled in the art that the present utility model 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 utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (10)

1. An engine, comprising:

the camshaft cover (10), the camshaft cover (10) is provided with a shaft hole (11), the shaft hole (11) is a stepped hole, and a large-diameter section (111), a flange (112) and a small-diameter section (113) are sequentially arranged along the axial direction of the shaft hole;

the bearing (20) is mounted on the large-diameter section (111), the bearing (20) comprises an outer ring (21) and an inner ring (22), the outer ring (21) is in interference fit with the large-diameter section (111), and one side end surface of the outer ring (21) is abutted against the flange (112);

the camshaft (30) is rotationally connected with the camshaft cover (10), one end of the camshaft (30) is provided with a shaft neck (31) and a shaft shoulder (32), the shaft neck (31) is in clearance fit with the inner ring (22), and the shaft shoulder (32) is in abutting joint with one side end face of the inner ring (22) along the axial direction;

the phaser, the phaser includes end cover (41), stator (42) and rotor (43), stator (42) with end cover (41) are fixed, rotor (43) with end cover (41) rotate and be connected and with camshaft (30) coaxial fixation, the terminal surface of rotor (43) protruding butt piece (431) that is equipped with, butt piece (431) along axial butt in the opposite side terminal surface of inner circle (22).

2. The engine according to claim 1, characterized in that said abutment block (431) is annular and is arranged coaxially to said rotor (43).

3. The engine according to claim 1, characterized in that the rotor (43) is provided with a plurality of abutment blocks (431), and in that the plurality of abutment blocks (431) are spaced and evenly arranged around the axis of the rotor (43).

4. An engine according to claim 3, characterized in that the rotor (43) is fixed to the camshaft (30) by means of a fastener, the camshaft (30) being provided with a threaded hole (33) along the axis, the fastener being inserted into the threaded hole (33) in threaded connection with the camshaft (30) after passing axially through the end cap (41) and the rotor (43).

5. The engine of claim 4, wherein the fastener is an oil control valve bolt (50) comprising an oil inlet chamber and an adjustment chamber, the camshaft (30) defines an oil inlet passage (34), the oil inlet passage (34) communicates with the oil inlet chamber, a one-way valve is disposed between the oil inlet chamber and the adjustment chamber, and the one-way valve is configured to permit one-way communication of oil from the oil inlet chamber to the adjustment chamber.

6. The engine according to claim 1, characterized in that the bearing (20) is a ball bearing, a sliding groove (23) is formed between the inner ring (22) and the outer ring (21), a plurality of balls (24) are arranged in the sliding groove (23), and the balls (24) rotate relative to the inner ring (22) and/or the outer ring (21).

7. The engine according to claim 6, wherein the bearing (20) further comprises a cage, the cage being provided with a plurality of mounting holes along a circumferential direction thereof, and the balls (24) are placed in one-to-one correspondence with the mounting holes.

8. The engine according to claim 6, characterized in that a lubrication oil path is formed between the camshaft cover (10) and the camshaft (30), the flange (112) of the camshaft cover (10) is provided with a relief groove (114), and the sliding groove (23) is communicated with the lubrication oil path through the relief groove (114).

9. An automobile comprising the engine of any one of claims 1-8.

10. The vehicle of claim 9, further comprising a timing chain system comprising a chain, the phaser further comprising a sprocket (432), the sprocket (432) being coaxially fixed with the rotor (43), the sprocket (432) being in driving connection with the chain.