CN114876661B - Camshaft upper cover, cylinder cover assembly and diesel engine - Google Patents
Camshaft upper cover, cylinder cover assembly and diesel engine Download PDFInfo
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- CN114876661B CN114876661B CN202210514860.1A CN202210514860A CN114876661B CN 114876661 B CN114876661 B CN 114876661B CN 202210514860 A CN202210514860 A CN 202210514860A CN 114876661 B CN114876661 B CN 114876661B
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- 239000003921 oil Substances 0.000 claims description 35
- 239000010705 motor oil Substances 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 13
- 230000007246 mechanism Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000003754 machining Methods 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention relates to the technical field of diesel engines, in particular to a cam shaft upper cover, a cylinder cover assembly and a diesel engine. The camshaft upper cover is provided with a fixing hole, and the rocker shaft support is fixed on the camshaft upper cover by matching the fixing hole with a first fastener; the fixed orifices include screw thread portion and location portion, and screw thread portion is used for with first fastener screw thread fit, and location portion is used for the holding positioning sleeve. This camshaft upper cover is through dividing into screw thread portion and location portion with the fixed orifices, through screw thread portion and first fastener cooperation, location portion and positioning sleeve cooperation, the hole that will fix the rocking arm axle support is integrated into same fixed orifices with the hole that is used for the location, has replaced traditional locating pin location's form, can 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 cam shaft 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 a cam shaft upper cover, a cylinder cover assembly and a diesel engine.
Background
At present, on most domestic diesel engines, especially on straight six-cylinder heavy-duty diesel engines, a single overhead camshaft is mostly adopted in a gas distribution system. However, with the increasing harshness of national and even international emission regulations, a diesel engine gas distribution system based on national seventh development needs to adopt a gas distribution scheme with double overhead camshafts in order to better ensure the use of functions such as delayed closing of an intake valve and advanced opening of an exhaust valve; in the double overhead camshaft gas distribution system, the upper cover of the camshaft is one of the essential key parts. The existing camshaft upper cover needs to be positioned by utilizing the positioning pin, and the space utilization rate of the camshaft upper cover is reduced due to the installation of the positioning pin, so that the assembly of the whole cylinder cover assembly is inconvenient, and the assembly efficiency is low.
Accordingly, there is a need for a cam shaft cover that solves the above-mentioned problems.
Disclosure of Invention
The first aim of the invention is to provide a cam shaft upper cover, 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 capable of improving the assembly efficiency of the cylinder head assembly by applying the above-described 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 achieve the above object, the following technical scheme is provided:
in a first aspect, a camshaft upper cover is provided, a fixing hole is formed in the camshaft upper cover, and a rocker shaft support is fixed on the camshaft upper cover by means of matching of a first fastener 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 scheme of camshaft upper cover, be equipped with the installation boss on the camshaft upper cover, be equipped with mounting hole and screw hole on the installation boss, the mounting hole is used for cooperating with the engine oil control valve, the screw hole is used for supplying the fastener to pass in order to with the engine oil control valve is fixed in on the installation boss.
As an alternative scheme of the upper cover of the cam shaft, an oil cavity is formed in the upper cover of the cam shaft, an engine oil control valve oil way is formed in the wall of the mounting hole, and the engine oil control valve oil way is communicated with the oil cavity.
As an alternative scheme of the cam shaft upper cover, a disassembly opening is formed in the side wall of the lower end of the cam shaft upper cover.
As an alternative to the camshaft upper cover, the camshaft upper cover may have different shapes at both ends in the length direction thereof.
In a second aspect, there is provided a cylinder head assembly comprising a camshaft upper cover as described above.
As an alternative scheme of the cylinder head assembly, the cylinder head assembly further comprises a cam shaft frame, a rocker shaft support and a positioning sleeve, wherein a first blind hole is formed in the cam shaft frame, the positioning sleeve is arranged on a positioning part of a fixing hole in an upper cover of the cam shaft, and a first fastener sequentially penetrates through the rocker shaft support, the fixing hole and the positioning sleeve to be fixedly connected with the first blind hole of the cam shaft frame.
As an alternative scheme of the cylinder head assembly, the cylinder head assembly further comprises a cylinder head, a second blind hole is formed in the cylinder head, and a second fastener sequentially penetrates through the rocker shaft support, the cam shaft upper cover and the cam shaft frame to be fixedly connected with the second blind hole of the cylinder head.
As an alternative scheme of the cylinder head assembly, an upper cam shaft half hole is formed in the cam shaft upper cover, a lower cam shaft half hole is formed in the cam shaft frame, and the lower cam shaft half hole is matched with the upper cam shaft half hole to form a cam shaft hole.
As an alternative scheme 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 fastener sequentially penetrates through the return spring seat, the cam shaft upper cover and the cam shaft frame to be fixedly connected with the third blind hole of the cylinder head.
In a third aspect, there is provided a diesel engine comprising a cylinder head assembly as described above.
Compared with the prior art, the invention has the beneficial effects that:
the camshaft upper cover is provided with the fixing holes, and the rocker shaft support is fixed on the camshaft upper cover by matching the first fastener with the fixing holes; the fixed orifices include screw thread portion and location portion, and screw thread portion is used for with first fastener screw thread fit, and location portion is used for the holding positioning sleeve. This camshaft upper cover is through dividing into screw thread portion and location portion with the fixed orifices, through screw thread portion and first fastener cooperation, location portion and positioning sleeve cooperation, the hole that will fix the rocking arm axle support is integrated into same fixed orifices with the hole that is used for the location, has replaced traditional locating pin location's form, can 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 cam shaft 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 of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic view of a cylinder head assembly according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a cylinder head assembly provided by an embodiment of the present invention;
FIG. 3 is a schematic view of a cam shaft top cover according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a camshaft top cover provided by an embodiment of the present invention;
FIG. 5 is a schematic top view of a camshaft top cover according to an embodiment of the present invention;
fig. 6 is a schematic bottom view of a cam shaft top cover according to an embodiment of the present invention.
Reference numerals:
100-cylinder head assembly; 101-a camshaft bore;
1-a cam shaft upper cover; 11-fixing holes; 111-threaded portion; 112-a positioning part; 12-mounting bosses; 121-mounting holes; 1211-an oil control valve oil passage; 122-a threaded hole; 13-an oil chamber; 14-a disassembly port; 15-upper camshaft half-hole; 16-exhaust side rocker mechanism oil passages; 17-an oil passage of the rocker arm mechanism on the air inlet side; 18-a cam journal lubrication oil hole; 19-an oil hole in the oil cavity of the upper cover;
2-a camshaft frame; 21-a first blind hole; 22-lower camshaft half-bore;
3-rocker shaft support; 31-an air inlet rocker shaft support; 32-exhaust rocker shaft mount;
4-cylinder cover; 41-a second blind hole; 42-a third blind hole;
5-positioning the sleeve;
6-returning a spring seat;
71-a first fastener; 72-a second fastener; 73-third fastener.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the 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, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be directly connected or indirectly connected; either mechanically or electrically. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
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 disposed above the camshaft upper cover 1, the camshaft upper cover 1 is disposed above the camshaft frame 2, and the camshaft frame 2 is disposed 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 using a first fastener 71 to match the fixing hole 11; the fixing hole 11 includes a threaded portion 111 for threaded engagement with the first fastener 71, and a positioning portion 112 for receiving the positioning sleeve 5. This camshaft upper cover 1 is through dividing into screw thread portion 111 and location portion 112 with fixed orifices 11, cooperates with first fastener 71 through screw thread portion 111, and location portion 112 cooperates with positioning sleeve 5, will fix the hole of rocking arm axle support 3 and the hole integration that is used for the location and become same fixed orifices 11, has replaced the form of traditional locating pin location, can improve the space utilization of camshaft upper cover 1, can improve cylinder head assembly 100 installation effectiveness again, reduces spare part quantity and kind.
The first fastener 71 passes through the rocker shaft support 3, the fixing hole 11 and the positioning sleeve 5 in sequence and is 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 cam shaft upper cover 1 and the cam shaft frame 2 to be fixedly connected with the second blind hole 41 of the cylinder cover 4.
Illustratively, rocker shaft mount 3 includes an intake rocker shaft mount 31 and an exhaust rocker shaft mount 32. The camshaft upper cover 1 is provided with two fixing holes 11, and the rocker shaft support 3, the camshaft upper cover 1 and the camshaft frame 2 are fixedly connected through two first fasteners 71. Further, two second blind holes 41 are provided 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 upper cover 1 of the cam shaft can support the rocker shaft support 3 through structural design and processing, so that a valve mechanism and the cam shaft are more compact, and the mechanism response is quicker.
The cylinder cover 4 is provided with a third blind hole 42, and a third fastener 73 sequentially penetrates through the return spring seat 6, the cam shaft upper cover 1 and the cam shaft frame 2 to be fixedly connected with the third blind hole 42 of the cylinder cover 4. Illustratively, the return spring seat 6 is disposed between the intake rocker shaft mount 31 and the exhaust rocker shaft mount 32.
The upper cam shaft cover 1 is provided with an upper cam shaft half hole 15, the cam shaft frame 2 is provided with a lower cam shaft half hole 22, the cam shaft upper cover 1 is provided with an upper cam shaft half hole 15, the cam shaft frame 2 is provided with a lower cam shaft half hole 22, and the lower cam shaft half hole 22 is matched with the upper cam shaft half hole 15 to form a cam shaft hole 101. The camshaft hole 101 is used for mounting a camshaft. The camshaft upper cover 1 is fixed two camshafts of advance and exhaust simultaneously through camshaft hole 101, compares split type upper cover, and structural design of this camshaft upper cover 1 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. The camshaft upper cover 1 is cast with an integrated mounting boss 12 for mounting the engine oil control valve, the finished product upper cover after processing can mount the engine oil control valve used by the air distribution system on the place through a mounting hole 121, and then the engine oil control valve is fixed on the mounting boss 12 by using bolts matched with threaded holes 122.
The upper cover 1 of the camshaft is provided with an oil cavity 13, the wall of the mounting hole 121 is provided with an engine oil control valve oil way 1211, and the engine oil control valve oil way 1211 is communicated with the oil cavity 13. This design can satisfy the engine oil control valve installation while ensuring that the engine oil control valve oil passage 1211 remains clear.
The lower end side wall of the upper cover 1 of the cam shaft is provided with a dismounting opening 14. In practical application, the camshaft upper cover 1 and the camshaft frame 2 need to be combined and processed before the overall installation of the diesel engine so as to ensure the requirements of roundness, perpendicularity and the like of the camshaft hole 101, the camshaft upper cover 1 needs to be removed after the combined and processed, parts such as a camshaft are assembled again, the work of disassembling the camshaft upper cover 1 can be better completed through the combined and processed disassembling port 14, and meanwhile, the disassembling tool can be prevented from scratching the installation surface of the camshaft upper cover 1.
The camshaft upper cover 1 is different in shape at both ends in the longitudinal direction thereof. The design realizes the error-setting function during assembly, provides identification and error-proof identification for certain operation posts, and avoids assembly errors.
The cam shaft upper cover 1 is also provided with an exhaust side rocker arm mechanism oil way 16 and an intake side rocker arm mechanism oil way 17, which provide guarantees for realizing functions of delayed closing of an intake valve, early opening of an exhaust valve and the like of a gas distribution system.
The cam shaft upper cover 1 is also provided with a cam shaft neck lubricating oil hole 18, and lubricating oil conveyed by the diesel engine is uniformly conveyed to each shaft neck of the intake and exhaust cam shafts through the cam shaft neck lubricating oil hole 18, so that timely and better lubrication is performed. Further, the upper camshaft cover 1 and the lower camshaft frame 2 are made of high-strength cast aluminum materials and have good lubricating function, so that a cam bearing bush can be omitted from a diesel engine, the cost is reduced, and the number and the types of parts are reduced. In other embodiments, the camshaft upper cover 1 may be cast aluminum or engineering plastic.
The upper cover 1 of the camshaft is also provided with an upper cover oil cavity upper oil hole 120.
The oil way is integrated in the camshaft upper cover 1, so that the arrangement space is better saved, and the utilization rate of the upper space 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 engine 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 upper oil hole 120 and a dismounting port 14, and is used for mounting a positioning part 112 of a positioning sleeve 5.
The processing and assembling process of the cylinder head assembly 100 provided in this embodiment is as follows:
(1) The installation process before processing: after the finished camshaft upper cover 1 is inspected to be qualified, a special tool is used for loading two specifications of rivet plugging at the oil cavity 13 to ensure that high-pressure oil of the oil cavity is completely sealed, then each upper cover is knocked into two positioning sleeves 5 in sequence, and 14 positioning sleeves 5 are knocked into the seven-gear upper cover; then, according to the technical conditions of assembly of the diesel engine, sequentially press-fitting the seven-gear upper cover on the camshaft frame 2, wherein the press-fitting process is required to be strictly installed according to technical requirements and error-proofing marks; the front assembly of the combined machining cam shaft hole 101 does not need to be provided with the intake rocker shaft support 31 and the exhaust rocker shaft support 32, so that the assembly installation fixing bolt does not need to be long fixing bolts, only three short fixing bolts 14 and two Q1841055 standard bolts are needed to be fixed, the three short fixing bolts (two first fastening pieces 71 and one third fastening piece 73) sequentially penetrate through the cam shaft upper cover 1, the cam shaft frame 2 is screwed into the cylinder cover 4 and screwed up according to the moment requirement, and the two Q1841055 standard bolts (two second fastening pieces 72) penetrate through the cam shaft upper cover 1 and are screwed into the cam shaft frame 2 and screwed up according to the moment requirement; after the seven gears are all installed, the gear can be sent to a processing workshop for combined processing of the cam shaft holes 101.
(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, and whether the tightening torque reaches 40 N.m required by technical conditions or not; then, when the boring cutter processes the camshaft hole 101, the runout 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 parts such as a camshaft to be mounted at a later stage.
(3) The disassembly process comprises the following steps: after the combined machining is finished, the fastening bolts of the upper covers 1 of the camshafts of all the gears are loosened and removed in sequence, the combined machining disassembly opening 14 of each upper cover is pried by a special tool, the upper covers are removed in sequence after all the upper covers are loosened, whether the positioning sleeve 5 on each upper cover falls off or is lost is checked, the air inlet camshafts and the air outlet camshafts are placed into the machined camshaft holes 101 in sequence after errors are avoided, each upper cover is pressed in sequence, the fixing bolts are screwed according to the fixing moment, the axial gaps and the rotation conditions of the two camshafts are checked again, the situation that the camshafts are blocked due to part machining or assembly errors is avoided, and the camshafts can be sent to the assembly after errors are confirmed.
(4) And (3) a final assembly process: after the intake and exhaust camshafts are installed in the camshaft holes 101, sequentially press-fitting seven-gear upper covers, and then replacing fixing bolts, wherein two long fixing bolts (second fasteners 72) and three short fixing bolts (two first fasteners 71 and one third fastener 73) are selected for each gear according to the structural form of FIG. 2; before installing bolts, the air inlet rocker arm shaft support 31 and the air outlet rocker arm shaft support 32 are sequentially placed on the upper cover of each gear, the middle bolt is also required to be provided with a return spring seat 6 for resetting the rocker arm mechanism, the installation direction and the like are also required to be paid attention to, fixing bolts are sequentially penetrated, bolt fastening is performed according to tightening torque during combined machining, after the whole cylinder cover assembly 100 is integrally installed, the whole cylinder cover assembly 100 can be perfected according to the technical condition of assembly, and after the cylinder cover assembly 100 is assembled, the cylinder cover assembly 100 can be sent to other working procedures for overall installation and debugging of a diesel engine.
Example two
This embodiment provides a diesel engine comprising a cylinder head assembly 100 as described in embodiment one. The diesel engine can improve the assembly efficiency of the diesel engine by applying the cylinder head assembly 100.
The diesel engine provided in this embodiment may be a heavy duty diesel engine or a light duty diesel engine.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (9)
1. The camshaft upper cover is characterized in that a fixing hole (11) is formed in the camshaft upper cover (1), and a first fastener (71) is matched with the fixing hole (11) to fix the rocker shaft support (3) on the camshaft upper cover (1); the fixing hole (11) comprises a threaded part (111) and a positioning part (112), the threaded part (111) is used for being in threaded fit with the first fastener (71), and the positioning part (112) is used for accommodating a positioning sleeve (5);
a mounting boss (12) is arranged on the cam shaft upper cover (1), a mounting hole (121) and a threaded hole (122) are arranged on the mounting boss (12), the mounting hole (121) is used for being matched with an engine oil control valve, and the threaded hole (122) is used for a fastener to pass through so as to fix the engine oil control valve on the mounting boss (12);
an oil cavity (13) is formed in the upper camshaft cover (1), an engine oil control valve oil way (1211) is formed in the hole wall of the mounting hole (121), and the engine oil control valve oil way (1211) is communicated with the oil cavity (13).
2. 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 dismounting opening (14).
3. Camshaft upper cover according to claim 1, characterized in that the camshaft upper cover (1) has a different shape at both ends in the length direction thereof.
4. A cylinder head assembly, characterized by comprising a camshaft top cover (1) according to any one of claims 1-3.
5. The cylinder head assembly according to claim 4, wherein the cylinder head assembly (100) further comprises a camshaft frame (2), a rocker shaft support (3) and a positioning sleeve (5), a first blind hole (21) is formed in the camshaft frame (2), the positioning sleeve (5) is arranged on a positioning portion (112) of a fixing hole (11) formed in the camshaft upper cover (1), and the first fastener (71) is used for sequentially penetrating through the rocker shaft support (3), the fixing hole (11) and the positioning sleeve (5) to be fixedly connected with the first blind hole (21) of the camshaft frame (2).
6. The cylinder head assembly according to claim 5, wherein the cylinder head assembly (100) further comprises a cylinder head (4), a second blind hole (41) is formed in the cylinder head (4), and a second fastener (72) is used to sequentially penetrate 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 head (4).
7. The cylinder head assembly according to claim 5, characterized in that the camshaft upper cover (1) is provided with an upper camshaft half-hole (15), the camshaft frame (2) is provided with a lower camshaft half-hole (22), and the lower camshaft half-hole (22) cooperates with the upper camshaft half-hole (15) to form a camshaft hole (101).
8. The cylinder head assembly according to claim 6, wherein the cylinder head assembly (100) further comprises a return spring seat (6), a third blind hole (42) is formed in the cylinder head (4), 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).
9. A diesel engine comprising a cylinder head assembly (100) according to any one of claims 4-8.
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 |
Publications (2)
| Publication Number | Publication Date |
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| CN114876661A CN114876661A (en) | 2022-08-09 |
| CN114876661B true 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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Family Cites Families (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 |
| DE102014217572A1 (en) * | 2013-09-27 | 2015-04-02 | Honda Motor Co., Ltd. | Cam bearing lubricating structure for internal combustion engine |
| CN104989546B (en) * | 2015-07-16 | 2017-07-25 | 东风商用车有限公司 | Rocker arm chamber assembly for heavy 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 |
| CN111648835B (en) * | 2020-06-22 | 2021-05-11 | 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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