Oil pump tappet lubricating system, vehicle engine and vehicle
By establishing a connecting lubrication channel between the cylinder head, camshaft, and header, the problem of insufficient lubrication of the oil pump tappet was solved, achieving effective lubrication and cost reduction, while also reducing the weight of the camshaft.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG GEELY HLDG GRP CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-04-17
AI Technical Summary
In the existing technology, insufficient lubrication of the oil pump tappet leads to difficulties in cylinder head processing, increases production cycle and cost, and some models cannot achieve effective lubrication due to insufficient space.
By establishing a connecting lubrication channel between the cylinder head, camshaft, and header, the existing lubrication channel in the cylinder head is used to lubricate the oil pump tappet, avoiding the need for additional oil channels. The design of multiple through holes and slots ensures effective lubrication.
This achieves effective lubrication of the oil pump tappets, reduces cylinder head production cycle and cost, and lightens the weight of the camshaft.
Smart Images
Figure CN224134713U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of engine lubrication, and in particular relates to an oil pump tappet lubrication system, a vehicle engine, and a vehicle. Background Technology
[0002] As the core transmission component of the high-pressure fuel system, the fuel pump tappet moves linearly back and forth along the inner cavity of the camshaft under the drive of the camshaft. Its motion characteristics directly control the start and stop sequence of the high-pressure fuel pump, and thus determine the accuracy of fuel injection.
[0003] In related technologies, oil pump tappets primarily rely on camshaft splash lubrication. When insufficient lubrication occurs in the oil pump tappets, forced lubrication is typically achieved by adding lubrication channels to the cylinder head. However, adding lubrication channels to the cylinder head requires modifying or re-making the cylinder head mold, which increases the production cycle and cost. Furthermore, the feasibility of adding lubrication channels to the cylinder head is limited by the cylinder head's own dimensions; in some engine models, there is insufficient space for machining lubrication channels in the cylinder head. Utility Model Content
[0004] In view of this, it is necessary to provide an oil pump tappet lubrication system, a vehicle engine, and a vehicle for solving the above-mentioned technical problems.
[0005] An oil pump tappet lubrication system is used to lubricate the oil pump tappet. The oil pump tappet lubrication system includes:
[0006] The cylinder head has a lubricating oil passage, and the cylinder head has a first oil groove that communicates with the lubricating oil passage.
[0007] A camshaft is rotatably mounted on the cylinder head, and an oil passage is provided inside the camshaft;
[0008] A convex cover is installed on the cylinder head. The convex cover has a receiving cavity for accommodating at least a portion of the oil pump tappet. The convex cover has a second oil groove that communicates with the receiving cavity, and the first oil groove and the second oil groove are connected through the oil passage.
[0009] It is understandable that the connection between the lubricating oil passage and the accommodating cavity is achieved through the passage formed by the connection of the first oil groove, the oil passage and the second oil groove. This allows the oil pump tappet lubrication system to utilize the existing lubricating oil passage in the cylinder head to lubricate the oil pump tappet. This enables effective lubrication of the oil pump tappet. In this process, not only can the problem of insufficient space in some cylinder head models be avoided, which can reduce the cylinder head production cycle and cost, but it can also reduce the weight of the camshaft.
[0010] In one embodiment, the oil passage includes a first through hole, a second through hole, and a connecting hole, the connecting hole extending along the axial direction of the camshaft and communicating with the first through hole and the second through hole, respectively;
[0011] The first through hole can communicate with the first oil tank, and the second through hole can communicate with the second oil tank.
[0012] In one embodiment, the first through hole is disposed at a journal position of the camshaft, and the first through hole extends along the radial direction of the camshaft;
[0013] Furthermore, the second through hole is disposed at another journal position of the camshaft, and the second through hole extends along the radial direction of the camshaft.
[0014] It is understandable that the first and second through holes are set at the journal position of the camshaft, so as to meet the usage requirements that the first through hole on the camshaft can communicate with the first oil groove on the cylinder head, and the second through hole can communicate with the second oil groove on the cam cover.
[0015] In one embodiment, the first through hole has a first opening, and the first through hole can communicate with the first oil groove through the first opening; wherein, the number of the first through holes is configured to be multiple, and the multiple first openings of the multiple first through holes are arranged sequentially at intervals along the circumferential direction of the camshaft.
[0016] And / or, the second through hole has a second opening, and the second through hole can communicate with the second oil groove through the second opening; wherein, the number of the second through holes is configured to be multiple, and the multiple second openings of the multiple second through holes are arranged sequentially at intervals along the circumferential direction of the camshaft.
[0017] Understandably, the camshaft can have multiple first through holes for oil inlet and multiple second through holes for oil outlet. This increases the amount of oil passing through the oil passages on the camshaft per unit time, thereby ensuring the lubrication effect of the oil pump tappet lubrication system on the oil pump tappet.
[0018] In one embodiment, the number of the first through holes is configured to be four, and the four first through holes are arranged in a cross shape;
[0019] Furthermore, the number of the second through holes is configured to be four, and the four second through holes are arranged in a cross shape.
[0020] It is understandable that arranging multiple first through holes and multiple second through holes in a cross shape allows the camshaft to increase the amount of oil passing through the oil passages per unit time while ensuring its structural strength.
[0021] In one embodiment, the centerline of the connecting hole is located on the central axis of the camshaft.
[0022] It is understandable that the center line of the connecting hole is set on the central axis of the camshaft so that the rotation of the camshaft itself will not affect the flow of lubricating oil in the connecting hole. This facilitates the flow of lubricating oil in the cylinder head lubricating oil passage through the camshaft to the receiving cavity of the cam cover.
[0023] In one embodiment, the camshaft is further provided with a process hole, which is located on one side of the connecting hole in the axial direction of the camshaft and communicates with the connecting hole.
[0024] The camshaft is equipped with a sealing plug, which is located at the process hole and is used to block the connecting hole.
[0025] In one embodiment, the second oil tank includes an oil outlet, and the second oil tank can communicate with the receiving cavity through the oil outlet;
[0026] Furthermore, the oil outlet is inclined upwards in a direction away from the camshaft.
[0027] It is understandable that the oil outlet of the second oil groove is tilted upwards in a direction away from the camshaft. This facilitates the flow of lubricating oil in the second oil groove into the receiving cavity and ensures the lubrication effect of the oil pump tappet lubrication system on the oil pump tappet.
[0028] This application also provides a vehicle engine, including an oil pump tappet and the aforementioned oil pump tappet lubrication system;
[0029] The oil pump tappet is movably installed in the receiving cavity of the convex cover and is driven by the camshaft.
[0030] This application also provides a vehicle with the aforementioned vehicle engine.
[0031] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:
[0032] The oil pump tappet lubrication system, vehicle engine, and vehicle claimed in this application achieve communication between the lubrication oil passage and the receiving cavity through the passage formed when the first oil groove, oil passage, and second oil groove are connected. This allows the oil pump tappet lubrication system to utilize the existing lubrication oil passage in the cylinder head to achieve lubrication of the oil pump tappet, thus achieving effective lubrication of the oil pump tappet. In this process, it not only avoids the problem of insufficient space in some cylinder head models, reducing the cylinder head production cycle and cost, but also reduces the weight of the camshaft. Attached Figure Description
[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0034] Figure 1 This is an exploded view of the oil pump tappet lubrication system provided in this application.
[0035] Figure 2 This is a cross-sectional view of the oil pump tappet lubrication system provided in this application.
[0036] Figure 3 This is a schematic diagram of the cylinder head structure in this application.
[0037] Figure 4 This is a partial sectional view of the camshaft in this application.
[0038] Figure 5 This is a schematic diagram of the convex cover in this application.
[0039] Figure 6 for Figure 5 Sectional view of AA.
[0040] Reference numerals: 100, oil pump tappet lubrication system; 10, cylinder head; 11, lubricating oil passage; 12, first oil groove; 20, camshaft; 201, journal; 21, oil passage; 211, first through hole; 2111, first orifice; 212, second through hole; 2121, second orifice; 213, connecting hole; 22, process hole; 210, sealing plug; 30, convex cap; 31, receiving cavity; 32, second oil groove; 321, oil outlet. Detailed Implementation
[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0042] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.
[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0044] like Figure 1 , Figure 2 As shown, the oil pump tappet lubrication system 100 provided in this application is used to lubricate the oil pump tappet. The oil pump tappet lubrication system 100 includes a cylinder head 10, a camshaft 20, and a flange 30. The camshaft 20 is rotatably mounted on the cylinder head 10 via journals 201 and is pressed and limited by the flange 30; wherein, the flange 30 is connected and fixed to the cylinder head 10. That is, the camshaft 20 of this application specifically contacts the cylinder head 10 and the flange 30 respectively via journals 201, so that the camshaft 20 can rotate relative to the cylinder head 10 and the flange 30 during operation. Here, the number of journals 201 on the camshaft 20 that contact the cylinder head 10 and the flange 30 respectively is configured to be five.
[0045] like Figures 1 to 6As shown, the cylinder head 10 of this application has a lubricating oil passage 11, and a first oil groove 12 is provided in the cylinder head 10, which communicates with the lubricating oil passage 11; an oil passage 21 is provided inside the camshaft 20; a receiving cavity 31 is provided on the convex cover 30, which is used to accommodate at least part of the oil pump tappet (not shown in the figure), and a second oil groove 32 is provided on the convex cover 30, which communicates with the receiving cavity 31; and the first oil groove 12 and the second oil groove 32 can be connected through the oil passage 21. Here, the lubricating oil passage 11 on the cylinder head 10 is specifically the existing oil passage on the cylinder head 10 used for lubricating the journal 201 on the camshaft 20. In other words, the oil pump tappet lubrication system 100 of this application achieves the connection between the lubrication oil passage 11 and the accommodating cavity 31 by connecting the first oil groove 12 on the cylinder head 10, the oil passage 21 in the camshaft 20, and the second oil groove 32 on the convex cover 30. This allows the oil pump tappet lubrication system 100 to utilize the existing lubrication oil passage 11 of the cylinder head 10 to lubricate the oil pump tappet, thus achieving effective lubrication of the oil pump tappet. In this process, it is not necessary to open new oil passages to lubricate the oil pump tappet. This not only avoids the problem of insufficient space in some cylinder head 10 models, reducing the production cycle and cost of the cylinder head 10, but also reduces the weight of the camshaft 20.
[0046] It should be noted that this application utilizes the oil passage 21 inside the camshaft 20 to guide the lubricating oil flowing in the lubricating oil passage 11 on the cylinder head 10 to the oil pump tappet. This ensures that the lubricating oil passage 11 can be introduced into the receiving cavity 31 where the oil pump tappet is located, and meets the lubrication requirements of the oil pump tappet. In addition, the oil passage 21 is machined inside the camshaft 20, which saves a lot of material for machining the oil passage 21, thereby achieving a lightweight design of the camshaft 20.
[0047] like Figure 3 As shown, since this application only needs to open a first oil groove 12 on the cylinder head 10 that is connected to the oil passage 21 on the camshaft 20; and the camshaft 20 is rotatably mounted on the cylinder head 10 so that the cylinder head 10 and the camshaft 20 are at least partially in contact, it is clear that no matter how the spatial dimensions of the cylinder head 10 are changed, the first oil groove 12 can be added on the basis of the original cylinder head 10.
[0048] like Figure 2 , Figure 4 As shown, in one embodiment, the oil passage 21 includes a first through hole 211, a second through hole 212, and a connecting hole 213. The connecting hole 213 extends along the axial direction of the camshaft 20 and communicates with the first through hole 211 and the second through hole 212, respectively. The first through hole 211 can communicate with the first oil groove 12, and the second through hole 212 can communicate with the second oil groove 32.
[0049] It should be noted that, since the camshaft 20 needs to rotate relative to the cylinder head 10, during the rotation of the camshaft 20, the first through hole 211 on the camshaft 20 can be controlled to communicate intermittently with the first oil groove 12 on the cylinder head 10, and the second through hole 212 on the camshaft 20 can be connected intermittently with the second oil groove 32 on the convex cover 30.
[0050] like Figure 4 As shown, in this embodiment, the first through hole 211 is disposed at one journal position of the camshaft 20, and the first through hole 211 extends along the journal line direction of the camshaft 20; and the second through hole 212 is disposed at another journal position of the camshaft 20, and the second through hole 212 extends along the radial direction of the camshaft 20. That is to say, in this embodiment, the camshaft 20 has the first through hole 211 and the second through hole 212 disposed at the positions of the two journals 201 of the camshaft 20, which can satisfy the usage requirement that the first through hole 211 on the camshaft 20 can communicate with the first oil groove 12 on the cylinder head 10, and the second through hole 212 can communicate with the second oil groove 32 on the cam cap 30. Here, the first through hole 211 and the second through hole 212 are located at the positions of two adjacent journals of the camshaft 20. Specifically, the first through hole 211 can be located at the position of the fourth journal of the camshaft 20, and the second through hole 212 can be located at the position of the tail journal of the camshaft 20. Correspondingly, the first oil groove 12 is located at the fourth support journal of the cylinder head 10, and the second oil groove 32 is located at the fifth journal of the convex cover 30.
[0051] like Figure 4 As shown, in this embodiment, the first through hole 211 has a first opening 2111, and the first through hole 211 can communicate with the first oil groove 12 through the first opening 2111; wherein, the number of first through holes 211 is configured to be multiple, and the multiple first openings 2111 of the multiple first through holes 211 are arranged sequentially at intervals along the circumferential direction of the camshaft 20; and / or, the second through hole 212 has a second opening 2121, and the second through hole 212 can communicate with the second oil groove 32 through the second opening 2121; wherein, the second through hole The number of 212 is configured to be multiple, and the multiple second holes 2121 of the multiple second through holes 212 are arranged sequentially at intervals along the circumferential direction of the camshaft 20. Preferably, the number of both the first through holes 211 and the second through holes 212 is configured to be multiple, so that the camshaft 20 can have oil entering through multiple first through holes 211 and oil exiting through multiple second through holes 212. This can increase the amount of oil passing through the oil passage 21 on the camshaft 20 per unit time, thereby ensuring the lubrication effect of the oil pump tappet lubrication system 100 on the oil pump tappet.
[0052] It should be noted that when the camshaft 20 rotates once on the cylinder head 10, the multiple first through holes 211 on the camshaft 20 can be connected to the first oil groove 12 of the cylinder head 10 through the corresponding first orifice 2111, thereby achieving multiple oil intake of the camshaft 20; at the same time, the multiple second through holes 212 on the camshaft 20 can be connected to the second oil groove 32 of the convex cover 30 through the corresponding second orifice 2121, thereby achieving multiple oil output of the camshaft 20.
[0053] In this embodiment, the number of first through holes 211 is configured to be four, arranged in a cross shape; and the number of second through holes 212 is configured to be four, arranged in a cross shape, so that the camshaft 20 can increase the amount of oil passing through the oil passage 21 on the camshaft 20 per unit time while ensuring its own structural strength. It is understood that in other embodiments, the number of first through holes 211 and second through holes 212 may also be configured to be two, three, etc., which will not be elaborated here.
[0054] like Figure 2 , Figure 4 As shown, in one embodiment, the centerline of the connecting hole 213 is located on the central axis of the camshaft 20. That is, the connecting hole 213 is symmetrical with respect to the central axis of the camshaft 20, so that the rotation of the camshaft 20 itself will not affect the flow of lubricating oil in the connecting hole 213. This facilitates the flow of lubricating oil in the lubrication passage 11 of the cylinder head 10 through the camshaft 20 to the receiving cavity 31 of the convex cover 30. It can be understood that in other embodiments, the connecting hole 213 may also be eccentrically positioned with respect to the central axis of the camshaft 20.
[0055] like Figure 4 As shown, in one embodiment, the camshaft 20 also has a process hole 22, which is located on one side of the connecting hole 213 along the axial direction of the camshaft 20 and communicates with the connecting hole 213. A sealing plug 210 is installed on the camshaft 20, located at the process hole 22, to seal the connecting hole 213. That is, the camshaft 20 can pass through the process hole 22 to form the connecting hole 213, and the sealing plug 210 can be used to seal the oil passage 21 of the camshaft 20. Here, the sealing plug 210 can specifically be a cup-shaped plug, a ball plug, etc.
[0056] like Figure 5 , Figure 6As shown, in one embodiment, the second oil groove 32 includes an oil outlet 321, and the second oil groove 32 can communicate with the receiving cavity 31 through the oil outlet 321; furthermore, the oil outlet 321 is inclined upward in a direction away from the camshaft 20, which facilitates the flow of lubricating oil in the second oil groove 32 into the receiving cavity 31 and ensures the lubrication effect of the oil pump tappet lubrication system 100 on the oil pump tappet. It should be noted that the upward inclination angle of the oil outlet 321 on the second oil groove 32 can be specifically set according to the usage requirements, which will not be elaborated here.
[0057] This application also provides a vehicle engine, including an oil pump tappet. The oil pump tappet lubrication system 100 described above has the oil pump tappet movably mounted within a receiving cavity 31 of a convex cover 30 and engaging with a camshaft 20. This allows the camshaft 20 to control the linear reciprocating motion of the oil pump tappet when the vehicle engine is operating.
[0058] In addition, this application also provides a vehicle including the vehicle engine described above.
[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0060] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.
Claims
1. An oil pump tappet lubrication system for lubricating oil pump tappets, characterized in that, The oil pump tappet lubrication system (100) includes: The cylinder head (10) has a lubricating oil passage (11) and a first oil groove (12) is provided on the cylinder head (10), which is connected to the lubricating oil passage (11); A camshaft (20) is rotatably mounted on the cylinder head (10), and an oil passage (21) is provided inside the camshaft (20). A convex cover (30) is installed on the cylinder head (10). The convex cover (30) has a receiving cavity (31) for accommodating at least part of the oil pump tappet. The convex cover (30) has a second oil groove (32) which is connected to the receiving cavity (31). The second oil groove (32) is connected to the first oil groove (12) through the oil passage (21).
2. The oil pump lifter lubrication system of claim 1, wherein, The oil passage (21) includes a first through hole (211), a second through hole (212), and a connecting hole (213). The connecting hole (213) extends along the axial direction of the camshaft (20) and communicates with the first through hole (211) and the second through hole (212), respectively. The first through hole (211) can communicate with the first oil tank (12), and the second through hole (212) can communicate with the second oil tank (32).
3. The oil pump lifter lubrication system of claim 2, wherein, The first through hole (211) is provided at a journal position of the camshaft (20), and the first through hole (211) extends along the radial direction of the camshaft (20); Furthermore, the second through hole (212) is provided at another journal position of the camshaft (20), and the second through hole (212) extends along the radial direction of the camshaft (20).
4. The oil pump lifter lubrication system of claim 2, wherein, The first through hole (211) has a first opening (2111), and the first through hole (211) can communicate with the first oil groove (12) through the first opening (2111); wherein, the number of the first through holes (211) is configured to be multiple, and the multiple first openings (2111) of the multiple first through holes (211) are arranged sequentially at intervals along the circumferential direction of the camshaft (20); And / or, the second through hole (212) has a second opening (2121), and the second through hole (212) can communicate with the second oil groove (32) through the second opening (2121); wherein, the number of the second through holes (212) is configured to be multiple, and the multiple second openings (2121) of the multiple second through holes (212) are arranged sequentially at intervals along the circumferential direction of the camshaft (20).
5. The oil pump lifter lubrication system of claim 2, wherein, The number of the first through holes (211) is configured to be four, and the four first through holes (211) are arranged in a cross shape; Furthermore, the number of the second through holes (212) is configured to be four, and the four second through holes (212) are arranged in a cross shape.
6. The oil pump lifter lubrication system of claim 2, wherein, The centerline of the connecting hole (213) is located on the central axis of the camshaft (20).
7. The oil pump lifter lubrication system of claim 2, wherein, The camshaft (20) is also provided with a process hole (22), which is located on one side of the connecting hole (213) in the axial direction of the camshaft (20) and is connected to the connecting hole (213); The camshaft (20) is equipped with a sealing plug (210), which is located at the process hole (22) and is used to block the connecting hole (213).
8. The oil pump lifter lubrication system of claim 1, wherein, The second oil tank (32) includes an oil outlet (321), and the second oil tank (32) can communicate with the accommodating cavity (31) through the oil outlet (321); Furthermore, the oil outlet (321) is inclined upward in a direction away from the camshaft (20).
9. A vehicle engine characterized by, Includes an oil pump tappet and an oil pump tappet lubrication system (100) as described in any one of claims 1 to 8. The oil pump tappet is movably installed in the receiving cavity (31) of the convex cover (30) and is in drive cooperation with the camshaft (20).
10. A vehicle characterized by comprising: Includes the vehicle engine as described in claim 9.