Valve tappet of automobile engine
By designing an arc-shaped force-bearing seat and a bolted mounting post for automotive engine valve tappets, the problems of high maintenance costs and difficulty caused by mechanical tappet wear have been solved. This allows for partial replacement and uniform stress distribution, reducing maintenance costs and wear risks.
Patent Information
- Application Number
- CN202520573667.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-30
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-30
AI Technical Summary
Existing mechanical tappets become smaller and have increased surface roughness due to wear and tear during long-term use, affecting normal operation. Moreover, the overall replacement cost is high and difficult.
Design a valve tappet for automotive engines consisting of a bearing seat and a mounting post. The bearing seat has an arc-shaped bottom and a contact method similar to line contact or small-area surface contact. The mounting post is fixed by screws, allowing for individual replacement of damaged parts, reducing maintenance costs and difficulty.
It enables partial replacement of mechanical tappets, reducing maintenance costs and difficulty, improving maintenance efficiency, reducing wear, enhancing component versatility, and avoiding damage caused by stress concentration.
Smart Images
Figure CN223724694U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of automobile accessories, in particular to an automobile engine valve tappet. BACKGROUND
[0002] The automobile engine valve tappet is a key component in the valve mechanism, mainly responsible for transmitting the movement and force of the camshaft; it mainly includes mechanical tappet and hydraulic tappet; the mechanical tappet usually has a simple plane structure, generally made into a cylinder type to reduce the mass; such as mushroom tappet, which is mainly used in the valve mechanism of side-mounted valve; there is also a spherical tappet, which can significantly reduce the friction and lateral force; some camshaft-mounted car engines have adjusting washers on the upper part of the tappet body, which are used to adjust the valve clearance; the hydraulic tappet has a relatively complex structure, including a complex liquid system, mainly composed of a tappet body, a plunger, a ball seat, a plunger spring, a one-way valve and a one-way valve spring; through the built-in hydraulic system, the function of automatically adjusting the valve clearance is realized, thereby avoiding the noise and vibration caused by the valve clearance in the traditional engine;
[0003] Taking the mechanical tappet as an example, during long-term use, the working surface of the valve tappet in contact with the camshaft will be worn due to frequent friction and impact, resulting in a decrease in the size of the tappet and an increase in the surface roughness, which affects its normal work; the whole tappet needs to be replaced, but other parts can be used continuously except the force-receiving seat at the bottom of the tappet, which increases the use cost. SUMMARY
[0004] The utility model aims at providing an automobile engine valve tappet to solve the defects mentioned in the background.
[0005] To achieve the above-mentioned purpose, an automobile engine valve tappet is provided, which comprises a force-receiving seat and a mounting column, the bottom of the force-receiving seat is fixedly provided with a force-receiving part, the surface of the force-receiving seat is fixedly installed with a connecting seat, the surface of the connecting seat is fixedly covered with a limiting piece, the surface of the limiting piece is fixedly installed with the mounting column, the inside of the mounting column is provided with a through hole, the bottom of the through hole is provided with a mounting seat, and the bottom of the limiting piece is fixedly connected with a butt joint seat.
[0006] Preferably, the force-receiving part at the bottom of the force-receiving seat is arc-shaped, and the axial section of the force-receiving seat and the force-receiving part is a concentric circle structure.
[0007] Preferably, the surface of the connecting seat is provided with a butt joint groove, the bottom of the butt joint groove is provided with a threaded hole, the size of the butt joint groove and the butt joint seat is matched, and the butt joint seat is inserted into the inside of the butt joint groove.
[0008] Preferably, the butt joint groove and the butt joint seat are both hexagonal, the butt joint seat is inserted into the inside of the butt joint groove and is fixed by a connecting bolt.
[0009] Preferably, the inside of the docking seat is provided with a penetrating hole, the penetrating hole is arranged opposite to the threaded hole, and the connecting bolt is screwed in the inside of the threaded hole through the penetrating hole.
[0010] Preferably, the circumferential outer wall of the mounting column is uniformly provided with three groups of gasket positioning grooves, the distance between the adjacent two groups of gasket positioning grooves is consistent, and the cross section of the gasket positioning groove is arranged in an arc shape.
[0011] Compared with the prior art, the utility model has the beneficial effects that:
[0012] 1. The utility model discloses a mechanical tappet which is composed of a force receiving seat and a mounting column, and the specific mounting mode is as follows: holding the mounting column, if the tappet fails during engine maintenance, only the force receiving seat and the mounting column need to be checked to determine the specific damaged part, and then the damaged part is replaced, so that the tappet does not need to be replaced as a whole, the maintenance cost and difficulty are reduced, and the maintenance efficiency is improved.
[0013] 2. The cross section of the force receiving part at the bottom of the force receiving seat is arranged in an arc shape; the contact mode of the arc-shaped bottom and the cam is more similar to line contact or small-area surface contact, compared with a plane tappet, when the same load is borne, the contact area is relatively small, the arc-shaped bottom can make the force more uniformly distributed in the contact area, the problem of excessive edge stress is avoided, and the possibility of damage such as crack and deformation of the tappet due to edge stress concentration is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a front view of the utility model structure;
[0015] Figure 2 It is a bottom view of the utility model structure; Figure 1
[0016] Figure 3 It is an exploded view of the utility model structure; Figure 1
[0017] Figure 4 It is a bottom view of the utility model structure; Figure 3
[0018] Figure 5 It is a front view of the utility model structure; Figure 3
[0019] Figure 6 It is a side view of the utility model structure; Figure 3
[0020] Reference signs in the drawings: 1, force receiving seat; 11, force receiving part; 2, connecting seat; 3, mounting column; 31, gasket positioning groove; 32, mounting seat; 33, limiting sheet; 34, docking seat; 35, docking groove; 36, threaded hole; 37, penetrating hole; 38, connecting bolt. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0022] Please refer to Figures 1-4 The utility model provides a kind of automobile engine valve tappet, including stressed seat 1 and installation column 3, the bottom of stressed seat 1 is fixedly provided with stressed part 11, the surface of stressed seat 1 is fixedly installed with connecting seat 2, the surface of connecting seat 2 is fixedly covered with limit sheet 33, limit sheet 33 is fixedly installed with installation column 3, the inside of installation column 3 is provided with through hole, the bottom of through hole is provided with mounting seat 32, the bottom of limit sheet 33 is fixedly connected with docking seat 34.
[0023] Working principle: mechanical tappet is composed of stressed seat 1 and installation column 3 two parts, specific installation mode is: hand installation column 3, the docking seat 34 of installation column 3 bottom is inserted in the inside of docking groove 35 and is fixed by connecting bolt 38 with screwing;Mechanical tappet is divided into stressed seat 1 and installation column 3 two parts, so that the two parts can be optimized and improved separately according to different engine design requirements;In different models of engine, it can be adapted to different camshaft parameters or installation requirements by replacing only one part of stressed seat or installation column, improve the versatility of component, reduce production cost;When engine is maintained, if tappet fails, only stressed seat 1 and installation column 3 are checked respectively, the specific damage site is determined, then the damaged part is replaced specifically, without replacing tappet as a whole, reduce maintenance cost and difficulty, improve maintenance efficiency;The section of stressed part 11 of stressed seat 1 bottom is arc-shaped arrangement;Arc-shaped bottom is more similar to line contact or small area surface contact with the contact mode of cam, compared with plane tappet, the contact area is relatively small when bearing the same load, under the condition of certain pressure, the stress area is reduced, and the pressure is increased, but the material of contact site can withstand this higher pressure, and the stress distribution is more uniform due to the arc-shaped structure, so the local contact stress can be effectively reduced, and the wear of tappet and cam surface is reduced;When plane tappet contacts with cam, edge portion is prone to stress concentration phenomenon, and arc-shaped bottom can make force more evenly distributed in contact area, avoid the problem of excessive edge stress, reduce the possibility of crack, deformation and other damages of tappet due to edge stress concentration;Three groups of gasket positioning grooves 31 are evenly arranged on the circumferential outer wall of installation column 3, the installation of three groups of gaskets is facilitated by the arrangement of three groups of gasket positioning grooves 31;Ensure the sealing between tappet and engine mounting hole, prevent oil leakage and foreign matter from entering.
[0024] As a preferred implementation, the stress part 11 at the bottom of the stress seat 1 is arranged in an arc shape, and the axial section of the stress seat 1 and the stress part 11 is a concentric circle structure.
[0025] As a preferred implementation, the surface of the connecting seat 2 is provided with a butt joint groove 35, the bottom of the butt joint groove 35 is provided with a screw hole 36, the size of the butt joint groove 35 and the butt joint seat 34 is matched, and the butt joint seat 34 is inserted into the inside of the butt joint groove 35.
[0026] As a preferred implementation, the butt joint groove 35 and the butt joint seat 34 are arranged in a regular hexagon shape, the butt joint seat 34 is inserted into the inside of the butt joint groove 35 and is fixed by a connecting bolt 38.
[0027] As a preferred implementation, the inside of the butt joint seat 34 is provided with a penetrating hole 37, the penetrating hole 37 is arranged opposite to the screw hole 36, and the connecting bolt 38 is screwed into the inside of the screw hole 36 through the penetrating hole 37.
[0028] As a preferred implementation, three groups of gasket positioning grooves 31 are uniformly arranged on the circumferential outer wall of the mounting column 3, the distance between two adjacent groups of gasket positioning grooves 31 is consistent, and the cross section of the gasket positioning groove 31 is arranged in an arc shape.
[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A valve lifter for an automotive engine comprising a force receiving seat (1) and a mounting post (3), characterized in that: The bottom of the force receiving seat (1) is fixedly provided with a force receiving part (11), the surface of the force receiving seat (1) is fixedly provided with a connecting seat (2), the surface of the connecting seat (2) is fixedly provided with a limiting sheet (33), the surface of the limiting sheet (33) is fixedly provided with a mounting column (3), the inside of the mounting column (3) is provided with a through hole, the bottom of the through hole is provided with a mounting seat (32), and the bottom of the limiting sheet (33) is fixedly connected with a butt joint seat (34).
2. The automotive engine valve lifter of claim 1, wherein: The force receiving part (11) at the bottom of the force receiving seat (1) is arc-shaped, and the axial section of the force receiving seat (1) and the force receiving part (11) is a concentric circle structure.
3. The automotive engine valve lifter of claim 1 wherein: The surface of the connecting seat (2) is provided with a butt joint groove (35), the bottom of the butt joint groove (35) is provided with a screw hole (36), the size of the butt joint groove (35) and the butt joint seat (34) is matched, and the butt joint seat (34) is inserted into the inside of the butt joint groove (35).
4. The automotive engine valve lifter of claim 3 wherein: The butt joint groove (35) and the butt joint seat (34) are both hexagonal, the butt joint seat (34) is inserted into the inside of the butt joint groove (35) and is fixedly connected through a connecting bolt (38).
5. A valve lifter for an automotive engine according to any one of claims 3 or 4, characterized in that: The inside of the butt joint seat (34) is provided with a through hole (37), the through hole (37) is oppositely arranged with the screw hole (36), and the connecting bolt (38) is screwed into the inside of the screw hole (36) through the through hole (37).
6. The automotive engine valve lifter of claim 1 wherein: The circumferential outer wall of the mounting column (3) is uniformly provided with three groups of gasket positioning grooves (31), the distance between adjacent two groups of gasket positioning grooves (31) is consistent, and the section of the gasket positioning groove (31) is arc-shaped.