CN114876661A - Camshaft upper cover, cylinder head assembly and diesel engine - Google Patents
Camshaft upper cover, cylinder head assembly and diesel engine Download PDFInfo
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- CN114876661A CN114876661A CN202210514860.1A CN202210514860A CN114876661A CN 114876661 A CN114876661 A CN 114876661A CN 202210514860 A CN202210514860 A CN 202210514860A CN 114876661 A CN114876661 A CN 114876661A
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- camshaft
- upper cover
- cylinder head
- hole
- head assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
- F02F7/0073—Adaptations for fitting the engine, e.g. front-plates or bell-housings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention relates to the technical field of diesel engines, in particular to an upper cover of a camshaft, a cylinder cover assembly and a diesel engine. The upper cover of the camshaft is provided with a fixing hole, and the rocker shaft support is fixed on the upper cover of the camshaft by utilizing a first fastener to match with the fixing hole; the fixing hole comprises a threaded portion and a positioning portion, the threaded portion is used for being in threaded fit with the first fastener, and the positioning portion is used for accommodating the positioning sleeve. This camshaft upper cover is through being divided into screw thread portion and location portion with the fixed orifices, through screw thread portion and the cooperation of first fastener, location portion and position sleeve cooperation, and the hole that will fix the rocking arm axle support is integrated for same fixed orifices with the hole that is used for the location, has replaced the form of traditional locating pin location, can enough improve the space utilization of camshaft upper cover, can improve cylinder head assembly installation effectiveness again, reduces spare part quantity and kind. The cylinder cover assembly is high in assembly efficiency by applying the camshaft upper cover. The diesel engine is high in assembly efficiency by applying the cylinder cover assembly.
Description
Technical Field
The invention relates to the technical field of diesel engines, in particular to an upper cover of a camshaft, a cylinder cover assembly and a diesel engine.
Background
At present, on most diesel engines in China, particularly on in-line six-cylinder heavy diesel engines, a single overhead camshaft is mostly adopted in a gas distribution system. However, with the increasingly stringent emission regulations in China and even internationally, the diesel engine air distribution system developed based on the seven countries needs to adopt an air distribution scheme with double overhead camshafts to better ensure the use of the functions of delaying the closing of an air inlet valve, advancing the opening of an exhaust valve and the like; in the double overhead camshaft air distribution system, the camshaft upper cover is one of essential key parts. The existing upper cover of the camshaft needs to be positioned by the positioning pin, the space utilization rate of the upper cover of the camshaft is reduced by the installation of the positioning pin, the whole cylinder cover assembly is inconvenient to assemble, and the assembly efficiency is low.
Therefore, a camshaft upper cover is urgently needed to solve the above problems.
Disclosure of Invention
The invention aims to provide an upper cover of a camshaft, which can realize positioning without a positioning pin and improve the space utilization rate.
A second object of the present invention is to provide a cylinder head assembly, which can improve the assembly efficiency of the cylinder head assembly by applying the above camshaft upper cover.
A third object of the present invention is to provide a diesel engine, which can improve the assembly efficiency of the diesel engine by applying the cylinder head assembly.
In order to realize the purpose, the following technical scheme is provided:
in a first aspect, a fixing hole is formed in the upper cover of the camshaft, and a rocker shaft support is fixed on the upper cover of the camshaft by utilizing a first fastener to match with the fixing hole; the fixing hole comprises a threaded portion and a positioning portion, the threaded portion is used for being in threaded fit with the first fastening piece, and the positioning portion is used for accommodating the positioning sleeve.
As an alternative of the camshaft upper cover, a mounting boss is arranged on the camshaft upper cover, a mounting hole and a threaded hole are formed in the mounting boss, the mounting hole is used for being matched with the engine oil control valve, and the threaded hole is used for allowing a fastener to penetrate so as to fix the engine oil control valve on the mounting boss.
As an alternative of the camshaft upper cover, an oil cavity is formed in the camshaft upper cover, an oil way of the engine oil control valve is formed in the hole wall of the mounting hole, and the oil way of the engine oil control valve is communicated with the oil cavity.
As an alternative of the camshaft upper cover, a dismounting opening is formed in the side wall of the lower end of the camshaft upper cover.
As an alternative to the camshaft upper cover, the camshaft upper cover is different in shape at both ends in its length direction.
In a second aspect, a cylinder head assembly is provided, comprising a camshaft upper cover as described above.
As an alternative of the cylinder head assembly, the cylinder head assembly further comprises a camshaft frame, a rocker arm shaft support and a positioning sleeve, wherein the camshaft frame is provided with a first blind hole, the positioning sleeve is arranged at a positioning part of a fixing hole on the camshaft upper cover, and a first fastening piece sequentially penetrates through the rocker arm shaft support, the fixing hole and the positioning sleeve to be fixedly connected with the first blind hole of the camshaft frame.
As an alternative of the cylinder head assembly, the cylinder head assembly further comprises a cylinder head, wherein a second blind hole is formed in the cylinder head, and a second fastening piece sequentially penetrates through the rocker shaft support, the upper camshaft cover and the camshaft frame to be fixedly connected with the second blind hole of the cylinder head.
As an alternative of the cylinder head assembly, the upper cover of the camshaft is provided with an upper camshaft half-hole, the camshaft frame is provided with a lower camshaft half-hole, and the lower camshaft half-hole and the upper camshaft half-hole are matched to form a camshaft hole.
As an alternative of the cylinder head assembly, the cylinder head assembly further comprises a return spring seat, a third blind hole is formed in the cylinder head, and a third fastening piece sequentially penetrates through the return spring seat, the upper camshaft cover and the camshaft frame to be fixedly connected with the third blind hole of the cylinder head.
In a third aspect, a diesel engine is provided, comprising a cylinder head assembly as described above.
Compared with the prior art, the invention has the beneficial effects that:
the upper cover of the camshaft provided by the invention is provided with a fixing hole, and the rocker shaft support is fixed on the upper cover of the camshaft by utilizing a first fastener to match with the fixing hole; the fixing hole comprises a threaded portion and a positioning portion, the threaded portion is used for being in threaded fit with the first fastener, and the positioning portion is used for accommodating the positioning sleeve. This camshaft upper cover is through being divided into screw thread portion and location portion with the fixed orifices, through screw thread portion and the cooperation of first fastener, location portion and position sleeve cooperation, and the hole that will fix the rocking arm axle support is integrated for same fixed orifices with the hole that is used for the location, has replaced the form of traditional locating pin location, can enough improve the space utilization of camshaft upper cover, can improve cylinder head assembly installation effectiveness again, reduces spare part quantity and kind.
According to the cylinder cover assembly provided by the invention, the assembly efficiency of the cylinder cover assembly can be improved by applying the camshaft upper cover.
According to the diesel engine provided by the invention, the assembly efficiency of the diesel engine can be improved by applying the cylinder cover assembly.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a cylinder head assembly according to an embodiment of the present invention;
FIG. 2 is a cross-sectional schematic view of a cylinder head assembly provided by an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an upper cover of a camshaft according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of an upper cover of a camshaft provided in an embodiment of the present invention;
FIG. 5 is a schematic top view of a camshaft upper cover provided in an embodiment of the present invention;
fig. 6 is a schematic bottom view of an upper cover of a camshaft according to an embodiment of the present invention.
Reference numerals:
100-a cylinder head assembly; 101-camshaft bore;
1-camshaft upper cover; 11-a fixation hole; 111-a threaded portion; 112-a positioning section; 12-mounting a boss; 121-mounting holes; 1211 — oil passage of oil control valve; 122-a threaded hole; 13-an oil chamber; 14-a removal port; 15-half hole of upper camshaft; 16-exhaust side rocker arm mechanism oil circuit; 17-air inlet side rocker arm mechanism oil circuit; 18-cam journal lubrication holes; 19-upper cover oil cavity upper oil hole;
2-camshaft frame; 21-a first blind hole; 22-lower cam shaft half bore;
3-rocker shaft support; 31-intake rocker shaft support; 32-exhaust rocker shaft support;
4-a cylinder head; 41-second blind hole; 42-third blind hole;
5-positioning the sleeve;
6-a return spring seat;
71-a first fastener; 72-a second fastener; 73-third fastener.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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 generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
In the description of the present invention, it should be noted that the terms "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 or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, 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, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
As shown in fig. 1 to 6, the present embodiment provides a cylinder head assembly 100 including a camshaft upper cover 1, a camshaft frame 2, a rocker shaft mount 3, a cylinder head 4, a positioning sleeve 5, and a return spring seat 6. The rocker shaft support 3 and the return spring seat 6 are provided above the camshaft upper cover 1, the camshaft upper cover 1 is provided above the camshaft frame 2, and the camshaft frame 2 is provided above the cylinder head 4.
The camshaft upper cover 1 provided by the embodiment is provided with a fixing hole 11, and the rocker shaft support 3 is fixed on the camshaft upper cover 1 by utilizing a first fastener 71 to match with the fixing hole 11; the fixing hole 11 includes a threaded portion 111 and a positioning portion 112, the threaded portion 111 being for threaded engagement with the first fastening member 71, and the positioning portion 112 being for accommodating the positioning sleeve 5. This camshaft upper cover 1 is through dividing fixed orifices 11 into screw thread portion 111 and location portion 112, through screw thread portion 111 and the cooperation of first fastener 71, location portion 112 and position sleeve 5 cooperation, and the hole that will fix rocking arm axle support 3 and the hole that is used for the location are integrated into same fixed orifices 11, have replaced the form of traditional locating pin location, can enough improve the space utilization of camshaft upper cover 1, can improve cylinder head assembly 100 installation effectiveness again, reduce spare part quantity and kind.
The first fastener 71 penetrates through the rocker shaft support 3, the fixing hole 11 and the positioning sleeve 5 in sequence to be fixedly connected with the first blind hole 21 of the camshaft frame 2.
The cylinder cover 4 is provided with a second blind hole 41, and a second fastener 72 sequentially penetrates through the rocker shaft support 3, the camshaft upper cover 1 and the camshaft frame 2 to be fixedly connected with the second blind hole 41 of the cylinder cover 4.
Illustratively, the rocker shaft mount 3 includes an intake rocker shaft mount 31 and an exhaust rocker shaft mount 32. Two fixing holes 11 are formed in the camshaft upper cover 1, and the rocker shaft support 3, the camshaft upper cover 1 and the camshaft frame 2 are fixedly connected through two first fasteners 71. Furthermore, two second blind holes 41 are formed in the cylinder head 4, and two second fasteners 72 fixedly connect the rocker shaft support 3, the camshaft upper cover 1, the camshaft frame 2 and the cylinder head 4 in sequence. The top surface of the camshaft upper cover 1 can support the rocker shaft support 3 through structural design and processing, so that the space between the valve actuating mechanism and the camshaft is more compact, and the mechanism response is quicker.
The cylinder head 4 is provided with a third blind hole 42, and a third fastener 73 sequentially penetrates through the return spring seat 6, the camshaft upper cover 1 and the camshaft frame 2 to be fixedly connected with the third blind hole 42 of the cylinder head 4. Illustratively, return spring seat 6 is disposed between intake rocker shaft mount 31 and exhaust rocker shaft mount 32.
An upper cam shaft half hole 15 is formed in the cam shaft upper cover 1, a lower cam shaft half hole 22 is formed in the cam shaft frame 2, the upper cam shaft upper cover 1 is provided with the upper cam shaft half hole 15, a lower cam shaft half hole 22 is formed in the cam shaft frame 2, and the lower cam shaft half hole 22 and the upper cam shaft half hole 15 are matched to form a cam shaft hole 101. The camshaft hole 101 is used for mounting a camshaft. Two camshafts of intake and exhaust are fixed simultaneously through camshaft hole 101 to camshaft upper cover 1, and split type upper cover compares, and this camshaft upper cover 1's structural design is more reasonable, and assembly efficiency is higher.
The camshaft upper cover 1 is provided with a mounting boss 12, the mounting boss 12 is provided with a mounting hole 121 and a threaded hole 122, the mounting hole 121 is used for being matched with the engine oil control valve, and the threaded hole 122 is used for allowing a fastener to pass through so as to fix the engine oil control valve on the mounting boss 12. When the camshaft upper cover 1 is cast, the installation boss 12 for installing the oil control valve is integrated, the machined finished product upper cover can install the oil control valve used by the gas distribution system at the position through the installation hole 121, and then the oil control valve fixing seat is installed on the boss 12 by matching a bolt with the threaded hole 122.
An oil chamber 13 is formed on the upper cover 1 of the camshaft, an oil control valve oil path 1211 is formed on the wall of the mounting hole 121, and the oil control valve oil path 1211 is communicated with the oil chamber 13. The design can ensure that the oil passage 1211 of the oil control valve keeps smooth while the installation of the oil control valve is met.
The side wall of the lower end of the camshaft upper cover 1 is provided with a dismounting opening 14. In practical application, camshaft upper cover 1 and camshaft frame 2 need make up processing before the installation of diesel engine totality to ensure requirements such as circularity and the straightness that hangs down of camshaft hole 101, still need tear camshaft upper cover 1 down after the combination processing, parts such as reassembling camshaft, dismantle the work of dismantling camshaft upper cover 1 through the completion that combination processing dismantles mouth 14 can be better, can avoid extracting tool fish tail camshaft upper cover 1's installation face simultaneously again.
The camshaft upper cover 1 is different in shape at both ends in its length direction. The design realizes the function of error placement during final assembly, provides identification and error-proofing marks for certain operation posts, and avoids assembly errors.
The upper cover 1 of the camshaft is also provided with an exhaust side rocker arm mechanism oil path 16 and an intake side rocker arm mechanism oil path 17, which provide guarantee for the realization of the functions of delaying the closing of an intake valve, advancing the opening of an exhaust valve and the like of the gas distribution system.
The upper cover 1 of the camshaft is also provided with a cam journal lubricating oil hole 18, and the lubricating oil delivered by the diesel engine is uniformly delivered to each journal of the intake and exhaust camshafts through the cam journal lubricating oil hole 18, so that timely and better lubrication is performed. Furthermore, the upper cam shaft cover 1 and the lower cam shaft frame 2 are both made of high-strength cast aluminum materials and are matched with a good lubricating function, so that a cam bearing bush of the diesel engine can be omitted, the cost is reduced, and the number and the types of parts are reduced. In other embodiments, the camshaft upper cover 1 may also be made of cast aluminum or engineering plastic.
The camshaft upper cover 1 is also provided with an upper cover oil cavity upper oil hole 120.
The oil way is integrated in the upper cover 1 of the camshaft, so that the arrangement space is better saved, and the space utilization rate of the upper part of the cylinder cover 4 is more reasonable.
The camshaft upper cover 1 is provided with an oil cavity 13, an exhaust side rocker arm mechanism oil way 16, a threaded hole 122, an oil control valve oil way 1211, a mounting hole 121, an air inlet side rocker arm mechanism oil way 17, an upper camshaft half hole 15, a cam journal lubricating oil hole 18, an upper cover oil cavity oil hole 120, a disassembly hole 14 and a positioning part 112 for mounting the positioning sleeve 5.
The machining and assembling process of the cylinder head assembly 100 provided by the embodiment is as follows:
(1) installation process before processing: after the finished camshaft upper cover 1 is qualified through inspection, firstly, special tools are used for installing rivet plugs with two specifications at the oil cavity 13 to ensure that high-pressure oil in the oil cavity is completely sealed, then each upper cover is sequentially knocked into two positioning sleeves 5, and 14 positioning sleeves 5 are required to be knocked into seven-gear upper covers; then, sequentially pressing and mounting the seven-gear upper cover on the camshaft frame 2 according to the technical conditions of diesel engine assembly, wherein the pressing and mounting process needs to be strictly mounted according to technical requirements and mistake proofing marks; the assembly does not need to be provided with the intake rocker shaft support 31 and the exhaust rocker shaft support 32 before the camshaft hole 101 is processed in a combined mode, so that the assembly is provided with fixing bolts without long fixing bolts, only three short fixing bolts 14 and two Q1841055 standard bolts are needed for fixing, the three short fixing bolts (two first fasteners 71 and one third fastener 73) sequentially penetrate through the camshaft upper cover 1 and the camshaft frame 2 and are screwed into the cylinder cover 4 according to the torque requirement, and the two Q1841055 standard bolts (two second fasteners 72) penetrate through the camshaft upper cover 1 and are screwed into the camshaft frame 2 according to the torque requirement; after the seven gears are installed, the camshaft holes 101 can be sent to a processing workshop for combined processing.
(2) The combined processing process comprises the following steps: before the assembly is combined and processed in a processing workshop, the tightening torque of each fastening bolt needs to be retested to determine whether the tightening torque meets the requirement of 40 N.m of technical conditions; then, when the boring cutter is used for processing the camshaft hole 101, the jumping tolerance of the boring cutter needs to be strictly controlled so as to ensure the roundness and the verticality of the camshaft mounting hole and ensure the accuracy and the reasonable clearance of the later-stage mounting of parts such as the camshaft and the like.
(3) The disassembling process comprises the following steps: after the combined machining is finished, fastening bolts of the upper covers 1 of all the cam shafts are sequentially loosened and removed, a special tool is used for prying the combined machining dismounting opening 14 of each upper cover, the upper covers are sequentially removed after all the upper covers are loosened, whether the positioning sleeve 5 on each upper cover falls off or is lost needs to be checked again at the moment, the air inlet cam shaft and the air outlet cam shaft are sequentially placed into the machined cam shaft hole 101 after no errors exist, then each upper cover is sequentially pressed and mounted, the fixing bolts are screwed according to the fixing moment, the axial clearance and the rotation condition of the two cam shafts are checked again, the condition that the cam shafts are clamped and blocked due to part machining or assembly errors is avoided, and the cam shafts can be sent to the final assembly after no errors are confirmed.
(4) And (3) final assembly process: after the air inlet and exhaust camshaft is installed in the camshaft hole 101, the seven-gear upper cover is pressed and installed in sequence, then the fixing bolts need to be exchanged, and two long fixing bolts (second fastening pieces 72) and three short fixing bolts (two first fastening pieces 71 and one third fastening piece 73) are selected for each gear according to the structural form shown in FIG. 2; before bolts are installed, an air inlet rocker arm shaft support 31 and an air outlet rocker arm shaft support 32 are required to be sequentially placed on each gear of upper cover, a return spring seat 6 is required to be installed at a middle bolt for returning a rocker arm mechanism, the installation direction and the like are also required to be noticed, fixing bolts are sequentially penetrated, bolt fastening is carried out according to the screwing torque during combined machining, after the whole cylinder cover assembly 100 is installed, the whole cylinder cover assembly 100 can be completed according to the assembly technical conditions, and the cylinder cover assembly 100 can be sent to other processes after being assembled to carry out overall installation and debugging of the diesel engine.
Example two
The embodiment provides a diesel engine, which comprises a cylinder head assembly 100 according to the first embodiment. The diesel engine can improve the assembly efficiency of the diesel engine by applying the cylinder head assembly 100.
The diesel engine provided by the embodiment can be a heavy-duty diesel engine and also can be a light-duty diesel engine.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. 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 by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (11)
1. The upper cover of the camshaft is characterized in that the upper cover (1) of the camshaft is provided with a fixing hole (11), and a first fastener (71) is matched with the fixing hole (11) to fix a rocker shaft support (3) on the upper cover (1) of the camshaft; the fixing hole (11) comprises a threaded portion (111) and a positioning portion (112), the threaded portion (111) is used for being in threaded fit with the first fastening piece (71), and the positioning portion (112) is used for accommodating the positioning sleeve (5).
2. The upper cover of the camshaft as claimed in claim 1, wherein a mounting boss (12) is provided on the upper cover (1), a mounting hole (121) and a threaded hole (122) are provided on the mounting boss (12), the mounting hole (121) is used for matching with an oil control valve, and the threaded hole (122) is used for a fastener to pass through to fix the oil control valve on the mounting boss (12).
3. The upper cover of the camshaft according to claim 2, wherein an oil chamber (13) is formed on the upper cover (1), an oil passage (1211) of the oil control valve is formed on the wall of the mounting hole (121), and the oil passage (1211) of the oil control valve is communicated with the oil chamber (13).
4. The camshaft upper cover according to claim 1, characterized in that the lower end side wall of the camshaft upper cover (1) is provided with a disassembly opening (14).
5. The camshaft upper cover according to claim 1, characterized in that the shape of both ends of the camshaft upper cover (1) in the length direction thereof is different.
6. A cylinder head assembly, characterized by comprising a camshaft upper cover (1) according to any one of claims 1 to 5.
7. The cylinder head assembly according to claim 6, wherein the cylinder head assembly (100) further comprises a camshaft frame (2), a rocker shaft support (3) and a positioning sleeve (5), wherein the camshaft frame (2) is provided with a first blind hole (21), the positioning sleeve (5) is arranged at a positioning part (112) of a fixing hole (11) on the camshaft upper cover (1), and the rocker shaft support (3), the fixing hole (11) and the positioning sleeve (5) are fixedly connected with the first blind hole (21) of the camshaft frame (2) by a first fastening piece (71) which sequentially penetrates through the rocker shaft support (3), the fixing hole (11) and the positioning sleeve (5).
8. The cylinder head assembly according to claim 7, characterized in that the cylinder head assembly (100) further comprises a cylinder head (4), wherein the cylinder head (4) is provided with a second blind hole (41), and the second blind hole (41) of the cylinder head (4) is fixedly connected with a second fastening member (72) sequentially penetrating the rocker shaft support (3), the camshaft upper cover (1) and the camshaft frame (2).
9. The cylinder head assembly according to claim 7, characterized in that the camshaft upper cover (1) is provided with an upper camshaft half bore (15), and the camshaft frame (2) is provided with a lower camshaft half bore (22), the lower camshaft half bore (22) and the upper camshaft half bore (15) cooperating to form a camshaft bore (101).
10. The cylinder head assembly according to claim 8, wherein the cylinder head assembly (100) further comprises a return spring seat (6), and the cylinder head (4) is provided with a third blind hole (42), and the third blind hole (42) of the cylinder head (4) is fixedly connected with a third fastening member (73) sequentially penetrating through the return spring seat (6), the camshaft upper cover (1) and the camshaft frame (2).
11. A diesel engine, characterized by comprising a cylinder head assembly (100) according to any one of claims 6 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210514860.1A CN114876661B (en) | 2022-05-11 | 2022-05-11 | Camshaft upper cover, cylinder cover assembly and diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210514860.1A CN114876661B (en) | 2022-05-11 | 2022-05-11 | Camshaft upper cover, cylinder cover assembly and diesel engine |
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| CN114876661A true CN114876661A (en) | 2022-08-09 |
| CN114876661B CN114876661B (en) | 2023-06-30 |
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| CN202210514860.1A Active CN114876661B (en) | 2022-05-11 | 2022-05-11 | Camshaft upper cover, cylinder cover assembly and diesel engine |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0842312A (en) * | 1994-08-01 | 1996-02-13 | Nissan Motor Co Ltd | Rocker shaft supporting structure of engine |
| US20150090210A1 (en) * | 2013-09-27 | 2015-04-02 | Honda Motor Co., Ltd. | Cam bearing lubrication structure for internal combustion engine |
| CN104989546A (en) * | 2015-07-16 | 2015-10-21 | 东风商用车有限公司 | Rocker arm compartment assembly for heavy-duty diesel engine |
| CN209067300U (en) * | 2018-11-01 | 2019-07-05 | 潍柴动力股份有限公司 | A kind of rocker arm body and engine |
| CN111648835A (en) * | 2020-06-22 | 2020-09-11 | 东风商用车有限公司 | Camshaft seat assembly and bearing seat assembly group |
| CN214007255U (en) * | 2020-11-25 | 2021-08-20 | 潍柴动力股份有限公司 | Rocker arm seat, valve driving mechanism and engine |
-
2022
- 2022-05-11 CN CN202210514860.1A patent/CN114876661B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0842312A (en) * | 1994-08-01 | 1996-02-13 | Nissan Motor Co Ltd | Rocker shaft supporting structure of engine |
| US20150090210A1 (en) * | 2013-09-27 | 2015-04-02 | Honda Motor Co., Ltd. | Cam bearing lubrication structure for internal combustion engine |
| CN104989546A (en) * | 2015-07-16 | 2015-10-21 | 东风商用车有限公司 | Rocker arm compartment assembly for heavy-duty diesel engine |
| CN209067300U (en) * | 2018-11-01 | 2019-07-05 | 潍柴动力股份有限公司 | A kind of rocker arm body and engine |
| CN111648835A (en) * | 2020-06-22 | 2020-09-11 | 东风商用车有限公司 | Camshaft seat assembly and bearing seat assembly group |
| CN214007255U (en) * | 2020-11-25 | 2021-08-20 | 潍柴动力股份有限公司 | Rocker arm seat, valve driving mechanism and engine |
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| Publication number | Publication date |
|---|---|
| CN114876661B (en) | 2023-06-30 |
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