CN216588752U - Camshaft and rocking arm axle mounting structure, engine and engineering equipment - Google Patents

Abstract

The utility model provides a camshaft and rocking arm axle mounting structure, engine and engineering equipment, wherein, camshaft and rocking arm axle mounting structure include can dismantle the cylinder cap of connecting from bottom to top in proper order, camshaft seat, camshaft cover and rocking arm axle head, be provided with first hole on the camshaft seat, be provided with first hole and second first hole on the camshaft cover, rocking arm axle is covered and is provided with second first hole, first hole and first hole cooperation form the camshaft mounting hole, second first hole and second first hole cooperation form the rocking arm axle mounting hole. In the structure, the cam shaft seat and the cylinder cover are arranged in a split mode, the processing difficulty of the cylinder cover can be effectively reduced, the rocker arm shaft seat is omitted, the functions of the rocker arm shaft seat are integrated on the cam shaft cover, the types of parts are reduced, and the defect that an engine cam shaft and a rocker arm shaft mounting structure in the prior art are not beneficial to production and manufacturing is overcome.

Description

Camshaft and rocking arm axle mounting structure, engine and engineering equipment

Technical Field

The utility model relates to an engine parts technical field, concretely relates to camshaft and rocking arm axle mounting structure, engine and engineering equipment.

Background

The engine is provided with a camshaft and a rocker shaft which are respectively used for mounting a cam and a rocker, and the rocker is used for transmitting the motion of the cam to a valve so as to drive the valve to open and close.

At present, in order to realize the installation of a camshaft and a rocker shaft, a camshaft seat is generally integrated on an engine cylinder cover, and then a camshaft cover is arranged and matched with the camshaft seat to install the camshaft. Meanwhile, a rocker shaft seat is separately arranged in the engine to realize the installation of the rocker shaft. However, the above design often causes the following problems to occur: because cylinder cap body structure has comparatively complicated, so behind integrated camshaft axle seat, can increase the cylinder cap processing degree of difficulty, and to the rocking arm axle seat, because its structure is comparatively simple, so can lead to the part variety to increase, be unfavorable for simplifying manufacturing equally, can increase the processing cost.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the defect that engine camshaft and rocking arm axle mounting structure among the prior art are unfavorable for the manufacturing to a camshaft and rocking arm axle mounting structure, engine and engineering equipment are provided.

In order to solve the problem, the utility model provides a camshaft and rocking arm axle mounting structure, it includes can dismantle cylinder cap, camshaft seat, camshaft lid and the rocking arm shaft cover of connecting from bottom to top in proper order. The camshaft cover is provided with a first upper half hole, the camshaft cover is provided with a first lower half hole and a second upper half hole, the rocker arm shaft cover is provided with a second lower half hole, the first upper half hole and the first lower half hole are matched to form a camshaft mounting hole, and the second upper half hole and the second lower half hole are matched to form a rocker arm shaft mounting hole.

Optionally, the camshaft and the rocker shaft mounting structure further comprises a first connecting piece, and the cylinder cover, the camshaft seat, the camshaft cover and the rocker shaft cover are sequentially detachably connected through the first connecting piece.

Optionally, a lubricating oil hole is formed in the cylinder cover, a first oil inlet channel and a first oil outlet channel are formed in the camshaft seat, and a second oil inlet channel and a second oil outlet channel are formed in the camshaft cover; the lubricating oil hole, the first oil inlet channel, the second oil outlet channel, the first oil outlet channel and the camshaft mounting hole are communicated in sequence.

Optionally, the camshaft and rocker shaft mounting structure further comprises a camshaft and a rocker shaft. Wherein, the camshaft is arranged in the camshaft mounting hole; the rocker shaft is arranged in the rocker shaft mounting hole, an oil conveying channel is arranged on the rocker shaft, the second oil inlet channel, the oil conveying channel and the second oil outlet channel are sequentially communicated, and the oil conveying channel is further communicated with the circumferential outer space of the rocker shaft.

Optionally, the camshaft and rocker shaft mounting structure further comprises a bushing, and the bushing is sleeved on the rocker shaft; the inner wall of the bush is provided with a shunt oil groove communicated with the oil delivery channel, the bottom wall of the shunt oil groove is provided with a plurality of oil guide holes, and the plurality of oil guide holes are respectively communicated with a rocker arm lubricating oil way on the rocker arm.

Optionally, a gap between the first connecting piece and the camshaft base forms a first oil outlet passage, and a gap between the first connecting piece and the camshaft cover forms a second oil outlet passage.

Optionally, the camshaft and rocker shaft mounting structure further includes a second connecting member, the second connecting member and the first connecting member are distributed at two ends of the camshaft base, and the second connecting member sequentially penetrates through the camshaft cover, the camshaft base and the cylinder cover.

The utility model also provides an engine, it includes as above camshaft and rocking arm axle mounting structure.

Optionally, the engine further includes a rocker arm, the rocker arm is provided with a rocker arm lubricating oil passage, a set screw hole and a pin shaft hole, the rocker arm lubricating oil passage is respectively communicated with the set screw hole and the pin shaft hole, and the rocker arm lubricating oil passage is further configured to lead to a working surface of the rocker arm cam.

The utility model also provides an engineering equipment, it includes as above the engine.

The utility model has the advantages of it is following:

1. the installation of the camshaft can be realized through the matching of the camshaft seat and the camshaft cover, and the installation of the rocker arm shaft can be realized through the matching of the camshaft cover and the rocker arm shaft cover. On the basis, the camshaft seat and the cylinder cover are arranged in a split manner, so that the processing difficulty of the cylinder cover can be effectively reduced, and the manufacturing is simplified; meanwhile, a rocker shaft seat is omitted, the functions of the rocker shaft seat are integrated on the camshaft cover, the types of parts are reduced, and the processing cost can be effectively reduced.

2. Can realize dismantling the connection between cylinder cap, camshaft seat, camshaft cover and the rocking arm shaft cover through a first connecting piece, the assembly is simple.

3. The cylinder cover, the camshaft seat, the rocker arm shaft, the camshaft cover and other structures are provided with oil passages for lubricating oil to flow, the camshaft bearing, the rocker arm and the like can be lubricated, the oil passages are simpler in design, the processing cost is lower, and the maintenance is more convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a perspective view of a camshaft and rocker shaft mounting structure (with the camshaft omitted) provided by the present invention;

fig. 2 is a schematic front view of a camshaft and a rocker shaft mounting structure provided by the present invention;

FIG. 3 is a schematic view of a portion of the structure of FIG. 2;

FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 3;

FIG. 5 is a schematic cross-sectional view in the direction C-C in FIG. 3;

fig. 6 shows a schematic perspective view of a bushing provided by the present invention;

fig. 7 shows a schematic view of an expanded structure of the bushing (from inside to outside view) provided by the present invention;

fig. 8 shows a schematic structural diagram of the rocker arm provided by the present invention.

Description of reference numerals:

10. a cylinder cover; 20. a camshaft seat; 21. a first upper half-bore; 22. a first oil inlet passage; 23. a first oil outlet channel; 24. an inclined oil outlet channel; 30. a camshaft cover; 31. a first lower half-bore; 32. a second upper half-hole; 33. secondly, performing secondary drying; 34. a second oil outlet channel; 40. a rocker shaft cover; 41. a second lower half-bore; 50. a first connecting member; 60. a second connecting member; 70. a camshaft; 80. a rocker shaft; 81. an oil delivery passage; 90. a bushing; 91. a diversion oil groove; 911. a branch structure; 92. a first oil guide hole; 93. a second oil guide hole; 94. a third oil guide hole; 100. a rocker arm; 101. a rocker arm lubricating oil circuit; 1011. a first sub oil passage; 1012. a second sub oil passage; 1013. a third sub oil passage; 102. adjusting screw holes; 103. the pin shaft hole.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and 2, the present embodiment provides a camshaft and rocker shaft mounting structure, which includes a cylinder head 10, a camshaft base 20, a camshaft cover 30, and a rocker shaft cover 40 detachably connected in this order from bottom to top. The camshaft base 20 is provided with a first upper half hole 21, the camshaft cover 30 is provided with a first lower half hole 31 and a second upper half hole 32, the rocker shaft cover 40 is provided with a second lower half hole 41, the first upper half hole 21 and the first lower half hole 31 are matched to form a camshaft mounting hole, and the second upper half hole 32 and the second lower half hole 41 are matched to form a rocker shaft mounting hole.

In the present embodiment, referring to fig. 1, both the first lower half-hole 31 and the second upper half-hole 32 are provided as semicircular holes; the second upper half hole 32 and the second lower half hole 41 are both provided as circular arc holes.

In terms of number, as shown in fig. 1, one cylinder head 10 is provided in one engine, and the camshaft holder 20, the camshaft cover 30 and the rocker shaft cover 40 are provided in plural numbers to match the lengths of the camshaft 200 and the rocker shaft 300. It will be appreciated that a plurality of camshaft bases 20, a plurality of camshaft caps 30 and a plurality of rocker shaft caps 40 are provided in a one-to-one correspondence.

As shown in fig. 2, the camshaft and rocker shaft mounting structure further includes a first connecting member 50, and the cylinder head 10, the camshaft seat 20, the camshaft cover 30 and the rocker shaft cover 40 are detachably connected in sequence by the first connecting member 50, so that the connecting members are small in number and simple to assemble.

Further, the camshaft and rocker shaft mounting structure further includes a second link 60. Referring to fig. 2, the second connecting member 60 is disposed opposite to the first connecting member 50 at both ends of the camshaft holder 20, and the second connecting member 60 is disposed to pass through the camshaft cover 30, the camshaft holder 20, and the cylinder head 10 in sequence. In this way, the second connecting member 60 and the first connecting member 50 can be engaged to achieve a stable connection between the camshaft cover 30, the camshaft cover 30 and the cylinder head 10.

In this embodiment, a positioning pin hole is further disposed at the lower edges of the camshaft base 20 and the camshaft cover 30, respectively. The camshaft seat 20 and the cylinder cover 10 are positioned by two positioning pins during assembly, and the camshaft cover 30 and the camshaft seat 20 are also positioned by two positioning pins during assembly.

Referring to fig. 2, the camshaft and rocker shaft mounting structure further includes a camshaft 70 and a rocker shaft 80. Wherein the camshaft 70 is mounted in the camshaft mounting hole, and the rocker shaft 80 is mounted in the rocker shaft mounting hole. In the present embodiment, the first connecting member 50 and the second connecting member 60 are both provided as bolts. When the rocker shaft 80 is mounted, the first connecting member 50 is connected to the cylinder head 10 through the rocker shaft cover 40, the rocker shaft 80, the camshaft cover 30, and the camshaft holder 20 in this order from top to bottom.

In a case where the camshaft and rocker shaft mounting structure is used as a whole, the camshaft 70 may be mounted in the camshaft mounting hole, and the rocker shaft 80 may be mounted in the rocker shaft mounting hole. At this time, because the camshaft seat 20 and the cylinder cover 10 are arranged separately, the processing difficulty of the cylinder cover 10 can be effectively reduced, and the manufacture is simplified; meanwhile, as the rocker shaft seat is omitted and the functions of the rocker shaft seat are integrated on the camshaft cover 30, the types of parts are reduced, and the processing cost can be effectively reduced.

Next, the oil passage arrangement of the camshaft and rocker shaft mounting structure will be described with reference to fig. 3 to 5.

In the present embodiment, a lubricating oil hole (not shown) is provided in the cylinder head 10 to supply lubricating oil. For the above-mentioned lubricating oil to flow, referring to fig. 4, a first oil inlet passage 22 and a first oil outlet passage 23 are provided on the camshaft seat 20; referring to fig. 5, a second oil inlet passage 33 and a second oil outlet passage 34 are provided on the camshaft cover 30.

Wherein, the lubricating oil hole, the first oil inlet channel 22, the second oil inlet channel 33, the second oil outlet channel 34, the first oil outlet channel 23 and the camshaft mounting hole are communicated in sequence. In this way, the lubricating oil can be introduced into the camshaft mounting hole. In this embodiment, the camshaft 70 is mounted in the camshaft mounting hole through the camshaft bearing, so that the camshaft bearing is lubricated after the lubricating oil is introduced into the camshaft mounting hole. Preferably, referring to fig. 5, a gap between the first connector 50 and the camshaft base 20 forms the first oil outlet passage 23, and a gap between the first connector 50 and the camshaft cover 30 forms the second oil outlet passage 34. The arrangement skillfully utilizes the connecting structure of the first connecting piece 50 and the camshaft base 20 and the camshaft cover 30 to form an oil passage, and additional holes do not need to be formed in the camshaft base 20 and the camshaft cover 30, so that the processing difficulty of the camshaft base 20 and the camshaft cover 30 is reduced, and the processing cost can be reduced.

In this embodiment, the first oil inlet passage 22 and the second oil inlet passage 33 are both provided as straight passages, so as to facilitate machining. Since the first connecting member 50 is a bolt, the first oil outlet passage 23 and the second oil outlet passage 34 are also provided as straight passages, respectively. Further, in consideration of a certain distance between the first oil outlet passage 23 and the camshaft mounting hole, as shown in fig. 5, an inclined oil outlet passage 24 is further provided on the camshaft base 20 to communicate the first oil outlet passage 23 and the camshaft mounting hole.

Dimensionally, referring to FIG. 4, the radial dimensions of the first and second oil feed passages 22, 33 are substantially the same. With reference to fig. 4 and 5, the sectional area of the first oil outlet channel 23 or the second oil outlet channel 34 is much smaller than the sectional area of the first oil inlet channel 22 or the second oil inlet channel 33, so that the oil outlet flow rate can be controlled, and the lubricating oil can be supplied more smoothly and stably.

On the other hand, in consideration of the sealing problem when the lubricating oil flows, the rocker shaft cover 40 and the first connecting member 50 are axially and hermetically connected in the present embodiment, so as to prevent the lubricating oil from leaking out of the rocker shaft cover 40.

Further, the rocker shaft 80 is provided with an oil delivery channel 81, the second oil inlet channel 33, the oil delivery channel 81 and the second oil outlet channel 34 are sequentially communicated, and the oil delivery channel 81 is also communicated with the circumferential outer space of the rocker shaft 80. Accordingly, the oil delivery passage 81 can be provided to ensure the normal circulation of the lubricating oil and to allow the lubricating oil to pass through the rocker arm shaft 80 to lubricate the rocker arms mounted on the rocker arm shaft 80.

In this embodiment, the first oil inlet passage 22, the second oil inlet passage 33, the oil delivery passage 81, the inclined oil outlet passage 24, and the like are all machined holes.

Preferably, the oil delivery passage 81 includes a first radial oil passage, an axial oil passage, a second radial oil passage, and a third radial oil passage. The first radial oil passage, the second radial oil passage and the third radial oil passage are all arranged along the radial direction of the rocker shaft 80, and the axial oil passage is arranged along the axial direction of the rocker shaft 80. In this embodiment, the first radial oil passage is communicated with the second oil inlet passage 33, the second radial passage is communicated with the second oil outlet passage 34, and the axial oil passage is connected between an outlet end of the first radial oil passage and an inlet end of the second radial oil passage; one end of the third radial oil passage is communicated with the axial oil passage, and the other end is communicated with the circumferential outer space of the rocker shaft 80.

Further, the second radial direction oil passage is formed by a gap between the first connecting member 50 and the rocker arm shaft 80 to reduce the difficulty of machining the rocker arm shaft 80 and reduce the machining cost.

Referring to fig. 4, 6 and 7, the camshaft and rocker shaft mounting structure further includes a bushing 90, the bushing 90 being fitted over the rocker shaft 80. Wherein, the inner wall of the bushing 90 is provided with a split oil groove 91, and the split oil groove 91 is communicated with the oil delivery channel 81 on the rocker arm shaft 80. Further, a plurality of oil guide holes are formed in a bottom wall of the oil distribution groove 91, and the oil guide holes are respectively communicated with a rocker arm lubricating oil passage in the rocker arm 100 (mounted on the rocker arm shaft 80).

According to the arrangement, the oil dividing groove 91 can guide the lubricating oil and enable the lubricating oil to flow to the plurality of oil guide holes, so that the lubricating oil is redistributed; and then, lubricating oil can be provided for different positions of the rocker arm 100 through a plurality of oil guide holes, so that the applicability is wider.

Regarding the arrangement of the whole oil path, in the prior art, as the camshaft seat is integrated on the engine cylinder cover, an oil path needs to be arranged on the engine cylinder cover to be communicated with the lower semicircle of the camshaft bearing so as to provide lubricating oil for the camshaft bearing; meanwhile, an oil way needs to be arranged on the engine cylinder cover to provide lubricating oil for the rocker arm and lubricate a rocker arm roller, a pin shaft and the like. At this time, since the blank of the engine cylinder head is originally cast complicatedly, the arrangement of the multiple oil passages increases the complexity of the processing of the engine cylinder head.

In contrast, in the present embodiment, the camshaft base 20 and the cylinder head 10 are separated, and the oil paths are provided on the camshaft base 20, the rocker arm shaft 80 and the camshaft cover 30, so that lubricating oil can be provided for elements such as the camshaft bearing and the rocker arm at the same time, and no complex oil path needs to be provided on the cylinder head 10, thereby greatly simplifying the oil path design, reducing the processing cost, simplifying the arrangement and facilitating the maintenance. In the present embodiment, as shown in fig. 7, the oil branching groove 91 is provided at a middle position of the liner 90, and the entirety thereof extends in the circumferential direction of the liner 90. In consideration of stability, a branch structure 911 is further disposed at an end of the oil diversion groove 91, and the branch structure 911 can buffer and balance the flow of the lubricating oil. Referring again to fig. 7, the oil guide holes include a first oil guide hole 92, a second oil guide hole 93, and a third oil guide hole 94. The first oil guide hole 92 is used for being communicated with a screw adjusting hole in the rocker arm through a rocker arm lubricating oil path, the second oil guide hole 93 is used for being communicated with a pin shaft hole in the rocker arm through the rocker arm lubricating oil path, and the third oil guide hole 94 is used for providing lubricating oil for the rocker arm cam through the rocker arm lubricating oil path.

Preferably, the thickness of the bushing 90 is set to 2mm to 4 mm. The width of the oil diversion groove is set to be 3mm-5mm, and the depth is set to be 0.1mm-0.6 mm.

The present embodiment also provides an engine including the camshaft and rocker shaft mounting structure as described above.

Further, the engine further includes a rocker arm 100, which is fitted over the rocker shaft 80. Referring to fig. 8, the rocker arm 100 is provided with a rocker arm lubricating oil passage 101, a set screw hole 102 and a pin shaft hole 103, the rocker arm lubricating oil passage 101 communicates with the set screw hole 102 and the pin shaft hole 103, respectively, and the rocker arm shaft lubricating oil passage 101 is also configured to open to the working face of the rocker cam. Specifically, the rocker arm 100 may be an intake rocker arm or an exhaust rocker arm.

According to the above arrangement, it is possible to realize: lubricating oil is introduced into the adjusting screw hole 102 through the rocker arm lubricating oil passage 101, so that the lubricating oil enters a lubricating oil passage of the adjusting screw (installed in the adjusting screw hole 102) from the adjusting screw hole 102, and a ball head and a ball socket are lubricated; lubricating oil is introduced into the pin shaft hole 102 through the rocker arm lubricating oil path 101 to lubricate the pin shaft; lubricating oil is delivered to the working surface of the rocker cam (the rocker cam is matched with a roller arranged on the pin shaft) through a rocker lubricating oil path 101, and lubricating oil is provided for the rocker cam.

In particular, as shown in fig. 8, the rocker arm lubricating oil passage 101 includes a first sub oil passage 1011, a second sub oil passage 1012, and a third sub oil passage 1013. The first sub-oil passage 1011 is connected to the set screw hole 102, the second sub-oil passage 1012 is connected to the pin hole 103, and the third sub-oil passage 1013 is connected to the working surface of the rocker cam.

It should be further noted that, in the prior art, the rocker arm is provided with the rocker arm lubricating oil path, but the rocker arm lubricating oil path can only perform forced lubrication on the ball head and the ball socket, and the roller and the pin shaft are in splash lubrication, so that the lubricating effect is poor.

Compared with the prior art, the rocker arm lubricating oil passage 101 is arranged in the embodiment, so that forced lubrication can be performed on the ball head and the ball socket, forced lubrication can be performed on the pin shaft and the rocker arm cam, namely forced lubrication is performed on all friction pairs associated with the rocker arm 100, and the lubricating effect is better. The embodiment also provides engineering equipment which comprises the engine. Specifically, the engineering equipment may be a heavy truck, a trailer, an excavator, an anchor driving machine, a bulldozer, a road roller, a concrete pump truck and other operation vehicles, and may also be a tower crane, a construction hoist, a material hoist and other mechanical operation equipment.

According to the above description, the present application has the following advantages:

1. the independent camshaft seat 20 is arranged, so that the processing difficulty of the cylinder cover 10 can be effectively reduced, and the manufacturing is simplified; the camshaft cover 30 can support the fixed camshaft 70 and the rocker shaft 80 at the same time, the integration degree is high, the types of parts are reduced, the processing cost is lower, the assembly is convenient, and the maintenance cost is low.

2. The cylinder cover 10, the camshaft seat 20, the rocker arm shaft 80, the camshaft cover 30, the bush 90 and the rocker arm 100 are provided with lubricating oil channels, so that a camshaft bearing, a rocker arm and the like can be lubricated, the oil channel design is simpler, the processing cost is lower, and the maintenance is more convenient.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. A camshaft and rocker shaft mounting structure is characterized by comprising a cylinder cover (10), a camshaft seat (20), a camshaft cover (30) and a rocker shaft cover (40) which are detachably connected from bottom to top in sequence;

the camshaft is characterized in that a first upper half hole (21) is formed in the camshaft seat (20), a first lower half hole (31) and a second upper half hole (32) are formed in the camshaft cover (30), a second lower half hole (41) is formed in the rocker shaft cover (40), the first upper half hole (21) and the first lower half hole (31) are matched to form a camshaft mounting hole, and the second upper half hole (32) and the second lower half hole (41) are matched to form a rocker shaft mounting hole.

2. The camshaft and rocker shaft mounting structure of claim 1, further comprising a first connecting member (50), wherein the cylinder head (10), the camshaft seat (20), the camshaft cover (30), and the rocker shaft cover (40) are detachably connected in sequence by the first connecting member (50).

3. The camshaft and rocker shaft mounting structure of claim 2, further comprising a second connector (60), the second connector (60) being distributed at both ends of the camshaft housing (20) opposite to the first connector (50), the second connector (60) being disposed through the camshaft cover (30), the camshaft housing (20) and the cylinder head (10) in this order.

4. The camshaft and rocker shaft mounting structure as claimed in claim 2, wherein a lubricating oil hole is provided in the cylinder head (10), a first oil inlet passage (22) and a first oil outlet passage (23) are provided in the camshaft base (20), and a second oil inlet passage (33) and a second oil outlet passage (34) are provided in the camshaft cover (30);

the lubricating oil hole, first oil feed passageway (22), second oil feed passageway (33) second oil outlet passageway (34) first oil outlet passageway (23) with the camshaft mounting hole communicates in proper order.

5. The camshaft and rocker shaft mounting structure of claim 4, further comprising:

a camshaft (70) mounted in the camshaft mounting bore;

the rocker shaft (80) is mounted in the rocker shaft mounting hole, an oil conveying channel (81) is arranged on the rocker shaft (80), the second oil inlet channel (33), the oil conveying channel (81) and the second oil outlet channel (34) are sequentially communicated, and the oil conveying channel (81) is further communicated with the circumferential outer space of the rocker shaft (80).

6. The camshaft and rocker shaft mounting structure of claim 5, further comprising a bushing (90), wherein the bushing (90) fits over the rocker shaft (80);

the oil transfer device is characterized in that a shunting oil groove (91) communicated with the oil transfer channel (81) is formed in the inner wall of the bushing (90), a plurality of oil guide holes are formed in the bottom wall of the shunting oil groove (91), and the oil guide holes are used for being communicated with a rocker arm lubricating oil way on a rocker arm respectively.

7. The camshaft and rocker arm shaft mounting structure as claimed in any one of claims 4 to 6, wherein a clearance between the first connecting piece (50) and the camshaft seat (20) forms the first oil outlet passage (23), and a clearance between the first connecting piece (50) and the camshaft cover (30) forms the second oil outlet passage (34).

8. An engine comprising the camshaft and rocker shaft mounting structure as set forth in any one of claims 1 to 7.

9. The engine of claim 8, further comprising a rocker arm having a rocker arm lubrication passage, a set screw hole, and a pin hole disposed thereon, the rocker arm lubrication passage communicating with the set screw hole and the pin hole, respectively, the rocker arm shaft lubrication passage further configured to open to a working face of the rocker cam.

10. An engineering plant, characterized by comprising an engine according to claim 8 or 9.

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