Plane tappet, engine valve timing mechanism, engine system and vehicle
By setting an oil passage inside the flat tappet, the oil flows to the gap between the contact surface and the camshaft, solving the problem of poor lubrication and improving the working efficiency of the engine valve train.
Patent Information
- Application Number
- CN202520640397.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-04-07
AI Technical Summary
Poor lubrication between the flat tappet and the camshaft leads to low efficiency of the engine valve train, affecting engine performance.
An oil passage is provided inside the flat tappet, allowing engine oil to flow in from the top and pass through the oil passage to the gap between the contact surface and the camshaft, thus improving lubrication performance.
The design of the oil passage ensures that a sufficient amount of engine oil flows to the gap between the contact surface and the camshaft, improving lubrication performance and thus increasing the working efficiency of the engine valve train.
Smart Images
Figure CN223825075U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of engine, especially to a planar tappet, an engine valve gear, an engine system and a vehicle BACKGROUND
[0002] The engine valve gear is an important component of the engine, and usually includes a camshaft and a tappet as core components. The camshaft drives the tappet to act through its rotation to finally realize the opening and closing of the valve.
[0003] The tappet is usually connected with the camshaft through the contact between its contact surface and the camshaft. For the planar tappet, the contact between the planar tappet and the camshaft is the contact between a plane and a curved surface, and the contact stress between them is large. The lubrication mode between them is splash lubrication. Therefore, the poor lubrication between the planar tappet and the camshaft may result in low working efficiency of the engine valve gear and even affect the performance of the engine.
[0004] Therefore, how to improve the lubrication performance between the planar tappet and the camshaft to improve the working efficiency of the engine valve gear has become a technical problem to be solved in the field. SUMMARY
[0005] The utility model aims at least solve how to improve the lubrication performance between the planar tappet and the camshaft to improve the working efficiency of the engine valve gear. The purpose is realized by the following technical scheme:
[0006] In the first aspect, the utility model provides a planar tappet, which comprises a base having a contact surface for sliding contact with a camshaft, the contact surface being a plane; and a tappet body fixedly connected with the base, the tappet body being located on the side of the base away from the contact surface, the end of the tappet body away from the base being a top end, the top end being used for abutting against a push rod; wherein the planar tappet has an oil passage in its interior, the two ends of the oil passage being a first opening and a second opening respectively, the first opening being located at the top end, and the second opening being located at the contact surface.
[0007] When the planar tappet is assembled into the engine valve gear of the engine system, oil will flow from the push rod to the planar tappet during the working process of the engine valve gear. First, the oil flows to the top end of the tappet body, then flows into the oil passage through the first opening, and finally flows out through the second opening. Therefore, the setting of the oil passage can ensure that a sufficient amount of oil flows to the gap between the contact surface and the camshaft, thereby improving the lubrication performance between the planar tappet and the camshaft and further improving the working efficiency of the engine valve gear.
[0008] In some embodiments of the utility model, the top end has a groove, the groove is recessed towards the base, the groove is used for abutting with the push rod, and the first opening is located in the groove.
[0009] In some embodiments of the utility model, the oil passage comprises at least one linear oil hole, and the linear oil hole is penetrated from the top end to the contact surface.
[0010] In some embodiments of the utility model, the oil passage comprises a plurality of linear oil holes which are arranged at intervals.
[0011] In some embodiments of the utility model, the plurality of linear oil holes are arranged at intervals around the axis of the tappet body.
[0012] In some embodiments of the utility model, the extension direction of the tappet body is perpendicular to the plane where the contact surface is located.
[0013] In some embodiments of the utility model, the extension direction of the linear oil hole is the same as the extension direction of the tappet body.
[0014] In the second aspect, the utility model provides an engine valve train, which comprises: any one of the planar tappets described above; a camshaft comprising a shaft body and a cam body connected to the shaft body, the cam body being in sliding contact with the contact surface of the planar tappet; a push rod, one end of the push rod being in abutment with the top end of the tappet body; a rocker arm device; and a valve device, the valve device being connected to one end of the push rod away from the tappet body through the rocker arm device, the push rod being used to drive the rocker arm device to act so as to drive the valve device to block or open the valve oil seal of the cylinder.
[0015] In the third aspect, the utility model provides an engine system, which comprises: an engine body having a cylinder, the cylinder being provided with a valve oil seal; and the engine valve train described above.
[0016] In the fourth aspect, the utility model provides a vehicle, which comprises a vehicle body and the engine system described above. 。
[0017] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS
[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:
[0019] Figure 1 A schematic diagram of a planar tappet from one perspective, provided for an embodiment of this utility model;
[0020] Figure 2 for Figure 1 A schematic diagram of a planar tappet from another perspective;
[0021] Figure 3 for Figure 1 A schematic diagram of a planar tappet from another perspective;
[0022] Figure 4 A schematic diagram of another planar tappet provided in an embodiment of this utility model from one perspective;
[0023] Figure 5 for Figure 4 A schematic diagram of a planar tappet from another perspective;
[0024] Figure 6 for Figure 5 A schematic diagram of a planar tappet from another perspective.
[0025] The attached figures are labeled as follows:
[0026] 10. Flat tappet;
[0027] 100. Base; 110. Contact surface;
[0028] 200. Tappet body; 210. Top end; 211. Groove;
[0029] 300, oil passage; 301, first opening; 302, second opening; 310, straight oil hole. Detailed Implementation
[0030] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
[0031] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.
[0032] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.
[0033] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.
[0034] Figure 1 A schematic diagram of a planar tappet from one perspective, provided for an embodiment of this utility model; Figure 2 for Figure 1 A schematic diagram of a planar tappet from another perspective; Figure 3 for Figure 1A schematic diagram of a planar tappet from another perspective; as shown in the image. Figures 1 to 3 As shown, this embodiment of the utility model provides a planar tappet 10, which includes:
[0035] The base 100 has a contact surface 110 for sliding contact with the camshaft, the contact surface 110 being a plane; and
[0036] The push rod body 200 is fixedly connected to the base 100. The push rod body 200 is located on the side of the base 100 away from the contact surface 110. The end of the push rod body 200 away from the base 100 is the top end 210, which is used to abut against the push rod.
[0037] The planar tappet 10 has an oil passage 300 inside, with a first opening 301 and a second opening 302 at its two ends. The first opening 301 is located at the top end 210, and the second opening 302 is located at the contact surface 110.
[0038] In this embodiment, after the flat tappet 10 is assembled into the engine valve train of the engine system, during the operation of the engine valve train, engine oil will flow from the pushrod to the flat tappet 10. First, the engine oil flows to the top 210 of the tappet body 200, then flows into the oil passage 300 through the first opening 301, and finally flows out through the second opening 302.
[0039] It is easy to understand that if the oil passage 300 is not provided, the oil can only flow along the side wall of the tappet body 200 to the base 100, and then along the side wall of the base 100 to the camshaft. This cannot guarantee that a sufficient amount of oil will flow to the gap between the contact surface 110 and the camshaft.
[0040] Therefore, the oil passage 300 in this embodiment can ensure that a sufficient amount of oil flows to the gap between the contact surface 110 and the camshaft, thereby improving the lubrication performance between the flat tappet 10 and the camshaft, and thus improving the working efficiency of the engine valve train.
[0041] The shape of the oil passage 300 is not limited, as long as the oil can flow into the oil passage 300 from the first opening 301 at the top 210 and finally flow out from the second opening 302 on the contact surface 110 to the gap between the contact surface 110 and the camshaft.
[0042] like Figure 1 As shown, according to an optional embodiment of the present invention, the top end 210 has a groove 211, which is recessed toward the base 100. The groove 211 is used to abut against the push rod, and the first opening 301 is located in the groove 211.
[0043] In this embodiment, the groove 211 facilitates the contact between the top end 210 of the tappet body 200 and the push rod, improving the stability between the push rod and the planar tappet 10. Moreover, when the top end 210 has the groove 211, the oil can flow into the groove 211 after passing through the top end 210 to collect. In other words, the groove 211 further ensures that a sufficient amount of oil can flow from the first opening 301 of the top end 210 into the oil passage 300, thereby further ensuring that a sufficient amount of oil can flow out from the second opening 302 on the contact surface 110 to the gap between the contact surface 110 and the camshaft, thereby further improving the working efficiency of the engine valve train.
[0044] The specific arrangement of the groove 211 is not limited, but should be determined according to the actual working conditions. For example, the entire surface of the top 210 can be recessed to form the groove 211, such as... Figure 1 As shown; or, the central portion of the top 210 may be recessed to form a groove 211.
[0045] Continue to refer to Figures 1 to 3 According to an optional embodiment of the present invention, the oil passage 300 includes at least one straight oil hole 310, which extends from the top end 210 to the contact surface 110.
[0046] In this embodiment, it is easy to understand that by setting the oil passage 300 as at least one straight oil hole 310, the oil can flow quickly to the gap between the contact surface 110 and the camshaft, thereby further improving the flow efficiency of the oil in the oil passage 300.
[0047] Figure 4 A schematic diagram of another planar tappet provided in an embodiment of this utility model from one perspective; Figure 5 for Figure 4 A schematic diagram of a planar tappet from another perspective; Figure 6 for Figure 5 A schematic diagram of a planar tappet from another perspective; as shown in the image. Figures 4 to 6 As shown, specifically, according to an optional embodiment of the present invention, the oil passage 300 includes a plurality of spaced-apart linear oil holes 310.
[0048] In this embodiment, since the oil passage 300 includes multiple spaced linear oil holes 310, when the oil flows to the top 210 of the tappet body 200, it will be divided into multiple streams that flow into different linear oil holes 310, and thus can eventually flow out from different positions on the contact surface 110. This makes the oil that finally flows to the gap between the contact surface 110 and the camshaft more uniform, thereby further improving the lubrication performance between the planar tappet 10 and the camshaft, and thus improving the working efficiency of the engine valve train.
[0049] Continue to refer to Figure 5 and Figure 6 According to an optional embodiment of the present invention, a plurality of linear oil holes 310 are evenly spaced around the axis of the tappet body 200.
[0050] In this embodiment, it is easy to understand that the arrangement of multiple straight oil holes 310 at uniform intervals can make the oil flowing to the gap between the contact surface 110 and the camshaft more uniform, thereby more effectively improving the lubrication performance between the flat tappet 10 and the camshaft, and thus more effectively improving the working efficiency of the engine valve train.
[0051] It should be noted that this embodiment only uses the example of... Figure 5 and Figure 6 The example shown uses four straight oil holes 310. In actual working conditions, the number of straight oil holes 310 should be determined according to the specific working conditions and is not limited.
[0052] refer to Figure 1 and Figure 4 According to an optional embodiment of the present invention, the extension direction of the linear oil hole 310 is the same as the extension direction of the tappet body 200, and the extension direction of the tappet body 200 is perpendicular to the plane where the contact surface 110 is located.
[0053] In this embodiment, since the planar tappet 10 needs to reciprocate linearly under the drive of the camshaft when working in the engine valve train, in order to ensure the efficiency and reliability of the work, the extension direction of the tappet body 200 is usually set to be perpendicular to the plane where the contact surface 110 is located, so as to improve the efficiency of the planar tappet 10 driving the push rod to reciprocate linearly.
[0054] Based on the above, the extension direction of the straight oil hole 310 is the same as the extension direction of the tappet body 200. This means that the extension direction of the oil passage 300 is the same as the linear movement path of the planar tappet 10 (especially the tappet body 200) during operation. This further improves the flow efficiency of the engine oil in the oil passage 300, thereby more effectively improving the lubrication performance between the planar tappet 10 and the camshaft, and thus more effectively improving the working efficiency of the engine valve train.
[0055] This utility model embodiment also provides an engine valve train mechanism, which includes:
[0056] Any of the above-mentioned planar tappets 10;
[0057] The camshaft includes a shaft body and a cam body connected to the shaft body, and the cam body slides in contact with the contact surface 110 of the planar tappet 10.
[0058] The push rod has one end abutting against the top 210 of the tappet body 200;
[0059] Rocker arm device; and
[0060] The valve assembly is connected to the end of the pushrod away from the tappet body 200 via a rocker arm assembly. The pushrod is used to drive the rocker arm assembly to block or open the valve oil seal of the cylinder.
[0061] In this embodiment, it is easy to understand that the rocker arm device includes a rocker arm shaft and a rocker arm body, and the rocker arm shaft is connected to the push rod; the valve device includes a valve stem and a valve body, the valve stem is connected to the rocker arm body, and the valve body cooperates with the valve oil seal.
[0062] When this engine valve train is working, firstly, the camshaft shaft is driven to rotate by the crankshaft, which in turn drives the cam body to rotate, thereby pushing the planar tappet 10 to move. This, in turn, drives the pushrod, rocker arm shaft, and rocker arm body to move in sequence. Finally, the rocker arm body drives the valve stem to move, thereby opening the valve stem seal and compressing the valve spring. During this process, fresh air or fuel mixture can enter the cylinder. When the cam body's protruding part rotates past the planar tappet 10, it is easy to understand that the planar tappet 10 will move in the opposite direction, thereby ultimately causing the valve stem to move in the opposite direction to seal the valve stem seal.
[0063] The beneficial effects of this type of engine valve train are the same as those of any of the aforementioned flat tappets 10. Both ensure that a sufficient amount of engine oil flows to the gap between the contact surface 110 and the camshaft, thereby improving the lubrication performance between the flat tappet 10 and the camshaft, and thus improving the working efficiency of the engine valve train. For details, please refer to the analysis of any of the aforementioned flat tappets 10, which will not be repeated here.
[0064] This utility model embodiment also provides an engine system, the engine system including: an engine body, having a cylinder, the cylinder having a valve stem seal; and the above-mentioned engine valve train mechanism.
[0065] In this embodiment, it is easy to understand that the valve device in the engine valve train corresponds to the valve stem seal installed in the cylinder, and the number of valve bodies in the valve device should match the number of valve stem seals, depending on the model of the engine body, and is not limited.
[0066] Similarly, the beneficial effects of this engine system are the same as those of the engine valve train described above, both of which can improve the lubrication performance between the flat tappet 10 and the camshaft, thereby improving the working efficiency of the engine valve train and thus improving the overall working efficiency of the engine system.
[0067] This utility model embodiment also provides a vehicle, which includes a vehicle body and the aforementioned engine system. 。
[0068] In this embodiment, it is easy to understand that if the overall working efficiency of the engine system is improved, the overall working efficiency of the vehicle can also be improved. Please refer to the above analysis for details, which will not be repeated here.
[0069] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A planar tappet, characterized in that, include: The base (100) has a contact surface (110) for sliding contact with the camshaft, the contact surface (110) being a plane; as well as The push rod body (200) is fixedly connected to the base (100). The push rod body (200) is located on the side of the base (100) away from the contact surface (110). The end of the push rod body (200) away from the base (100) is the top end (210), which is used to abut against the push rod. The planar tappet (10) has an oil passage (300) inside, with a first opening (301) and a second opening (302) at its two ends. The first opening (301) is located at the top end (210), and the second opening (302) is located at the contact surface (110).
2. The planar tappet according to claim 1, characterized in that, The top end (210) has a groove (211) that is recessed toward the base (100) and is used to abut against the push rod. The first opening (301) is located in the groove (211).
3. The planar tappet according to claim 1 or 2, characterized in that, The oil passage (300) includes at least one straight oil hole (310), which extends from the top end (210) to the contact surface (110).
4. The planar tappet according to claim 3, characterized in that, The oil passage (300) includes a plurality of spaced-apart straight oil holes (310).
5. The planar tappet according to claim 4, characterized in that, The plurality of linear oil holes (310) are evenly spaced around the axis of the tappet body (200).
6. The planar tappet according to claim 3, characterized in that, The extension direction of the tappet body (200) is perpendicular to the plane of the contact surface (110).
7. The planar tappet according to claim 6, characterized in that, The extension direction of the linear oil hole (310) is the same as the extension direction of the tappet body (200).
8. An engine valve train, characterized in that, include: The planar tappet (10) as described in any one of claims 1-7; A camshaft, including a shaft body and a cam body connected to the shaft body, wherein the cam body is in sliding contact with the contact surface (110) of the planar tappet (10); A push rod, one end of which abuts against the top end (210) of the tappet body (200); Rocker arm device; as well as The valve assembly is connected to the end of the push rod away from the tappet body (200) via the rocker arm assembly. The push rod is used to drive the rocker arm assembly to block or open the valve oil seal of the cylinder.
9. An engine system, characterized in that, include: The engine body has a cylinder, and the cylinder is equipped with a valve oil seal; as well as The engine valve train as described in claim 8.
10. A vehicle, characterized in that, Includes the vehicle body and the engine system as described in claim 9.