Novel hydraulic tappet multifunctional bearing

Abstract

The utility model provides a novel hydraulic tappet multifunctional bearing structure design scheme, and belongs to the field of machine manufacturing. The scheme design comprises a bearing sleeve, a bearing pin and a steel cable baffle ring, and a limiting counter bore is designed in the bearing sleeve and used for limiting displacement of the bearing pin; a guide arc surface and a clamping groove are designed on the bearing pin, the guide arc surface plays a role in guiding when the bearing is assembled, and the clamping groove plays a role in limiting and fixing after the steel cable baffle ring is assembled. The utility model has the functions of mounting and fixing and limiting the transverse displacement of the bearing pin, is simple in structure and convenient to mount, can avoid the deformation of parts caused by the assembly of the bearing, and ensures that the bearing has better performance and more comprehensive functions.

Description

Technical Field

[0001] The utility model relates to a novel structural scheme of a hydraulic tappet multifunctional bearing, belonging to the technical field of mechanical manufacturing. Background Art

[0002] The opening and closing of the valves in the operation of the automobile engine require hydraulic tappets, and the bearings are the key parts of the hydraulic tappets. They are in direct contact with the engine camshaft and are subject to large impact during operation. With the development of various engine accessory technologies and market competitiveness, accessories are required to have advantages such as multi-functionality, long service life, and low manufacturing cost. Traditional roller hydraulic tappet bearings have poor market economics and are difficult to meet market requirements.

[0003] At present, the bearings on the roller hydraulic tappet are all assembled with clearance fit, so the bearings need to be fixed on the hydraulic tappet by riveting with hydraulic equipment or welding with laser machine. When the bearing is fixed by laser welding, due to the high temperature of the laser during the welding process, tension will be generated after welding at both ends, causing the end surfaces of the bearing mounting seat to shrink inward, resulting in deformation of the parts or stress concentration inside the bearing mounting seat. When the engine is running at high speed, the bearing seat may break due to the large force. When the bearing is fixed by riveting with hydraulic equipment, the hardness of the two end surfaces of the bearing pin cannot be too high, otherwise riveting cannot be achieved; in order to ensure the performance and riveting effect, it is necessary to perform hardness tempering treatment on both ends of the bearing pin to make its hardness reach the required hardness for riveting before riveting can be performed. The hardness tempering process is complicated, time-consuming, labor-intensive and costly. In summary, the current assembly method has low assembly efficiency and high equipment cost, which is not conducive to mass production. Summary of the invention

[0004] The purpose of the utility model is to provide a technical solution with a new structure, reasonable design and convenient installation, so as to avoid deformation of parts caused by assembling bearings and make the bearings have better performance and more comprehensive functions.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a new type of hydraulic tappet multifunctional bearing, comprising a bearing sleeve (1), a bearing pin (2), and a wire retaining ring (3); a limited countersunk hole is designed on the bearing sleeve, and its function is to limit the displacement of the bearing pin; a guide arc surface and a groove are designed on the bearing pin, and the guide arc surface plays a guiding role when assembling the bearing; the groove limits the lateral displacement of the bearing pin after assembling the wire retaining ring, and fixes the bearing on the bearing mounting seat.

[0006] As the preferred embodiment of this scheme: the depth of the limiting countersunk hole on the bearing sleeve is equal to the thickness of the wire retaining ring, the purpose of which is to limit the displacement and ensure that the bearing pin is symmetrically assembled in the bearing mounting seat after assembly without any one-sided situation, thereby ensuring that the bearing pin will not fall off when assembled in the bearing mounting seat hole.

[0007] As a preferred embodiment of this solution: the surfaces of the bearing sleeve and the bearing pin are coated with DLC in order to improve the surface roughness and hardness, thereby reducing the rolling friction coefficient and increasing the service life of the bearing.

[0008] As a preferred embodiment of this solution: the outer diameter of the groove on the bearing pin is equal to the inner diameter of the wire retaining ring, and the depth of the groove is half of the diameter of the wire retaining ring. The dimensional design in this state can achieve the most ideal state for the wire retaining ring.

[0009] As a preferred embodiment of this solution, the wire retaining ring is designed to be open, so as to make the retaining ring elastic and facilitate the assembly of the wire retaining ring in the shaft pin slot.

[0010] The beneficial effects of the utility model are: 1. The bearing has the functions of installation and fixing and limiting the lateral displacement of the bearing pin. It has a simple structure and is easy to assemble. No tension is generated after assembly, which can avoid deformation of parts caused by assembling the bearing. 2. The bearing surface has high hardness, is wear-resistant, and has a long service life. There is no need to purchase equipment separately during assembly, so the assembly efficiency is high and the manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a cross-sectional view of the structure of the utility model; Figure 2 This is a cross-sectional view of the bearing sleeve of the utility model; Figure 3 This is a cross-sectional view of the bearing pin of the utility model; Figure 4 This is a structural view of the wire retaining ring of the utility model; Figure 5 It is a cross-sectional view of the assembly structure of the utility model.

[0012] In the figure: 1-bearing sleeve, 101-limiting countersunk hole, 2-bearing pin, 201-guide arc surface, 202-slot, 3-wire retaining ring, 4-bearing mounting seat. DETAILED DESCRIPTION

[0013] In order to clearly illustrate the technical features of this solution, the solution is described below through a specific implementation method and in conjunction with the accompanying drawings.

[0014] As shown in the accompanying drawings, a novel hydraulic tappet multifunctional bearing comprises a bearing sleeve (1), a bearing pin (2), and a wire retaining ring (3). During assembly, the wire retaining ring (3) is first assembled in a limiting countersunk hole (101), and then the limiting countersunk hole (101) is placed in a bearing mounting seat (4) with the surface facing upward; the bearing pin (2) is aligned with the hole of the bearing mounting seat (4) and the hole of the bearing sleeve (1) and inserted, and the guide arc surface (201) on the bearing pin (2) is pushed to contact the wire retaining ring (3), and the bearing pin (2) is continuously pushed, and the wire retaining ring (3) is opened by using the guide arc surface (201), and the inscribed circle of the wire retaining ring (3) is clamped on the outer circle of the bearing pin (2), and thrust is applied to push the bearing pin (2) until the wire retaining ring (3) is clamped in the clamping groove (202), and no more thrust is applied, and the bearing assembly is completed. At this time, the bearing sleeve (1) and the bearing pin (2) are fixed on the bearing mounting seat (4) through the wire retaining ring (3). When the bearing pin (2) is pushed left and right, it can only move in the bearing mounting seat (4) and will not fall out, thus meeting the design requirements.

[0015] The above description is only for explaining the present invention in more detail and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel hydraulic tappet multifunctional bearing, comprising a bearing sleeve (1), a bearing pin (2), and a wire retaining ring (3), characterized in that: A limited countersunk hole is designed on the bearing sleeve; a guide arc surface and a groove are designed on the bearing pin. The guide arc surface plays a guiding role when assembling the bearing, and the groove limits the lateral displacement of the bearing pin after the wire retaining ring is assembled, and fixes the bearing on the bearing mounting seat.

2. A novel hydraulic tappet multifunctional bearing according to claim 1, characterized in that: The depth dimension of the limiting countersunk hole on the bearing sleeve is equal to the thickness of the wire retaining ring, and its purpose is to limit the displacement of the bearing pin.

3. A novel hydraulic tappet multifunctional bearing according to claim 1, characterized in that: The entire surface of the bearing sleeve and the bearing pin is coated with DLC in order to increase the surface roughness and hardness, thereby reducing the rolling friction coefficient.

4. A novel hydraulic tappet multifunctional bearing according to claim 1, characterized in that: The outer diameter of the groove on the bearing pin is equal to the inner diameter of the wire retaining ring, and the depth of the groove is half of the diameter of the wire retaining ring.

5. The novel hydraulic tappet multifunctional bearing according to claim 1 is characterized in that: The wire retaining ring is of an open type, the purpose of which is to allow the retaining ring to have elasticity and facilitate the assembly of the wire retaining ring in the bearing pin slot.

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