Novel hydraulic tappet

Abstract

The utility model provides a novel hydraulic tappet, and belongs to the technical field of hydraulic tappets. The problem that an existing hydraulic tappet plunger is prone to abrasion is solved. The novel hydraulic tappet comprises a rocker arm and a tappet body, a plunger is arranged in the tappet body, the tappet body and the plunger are provided with a first oil inlet hole and a second oil inlet hole respectively, an oil passing pipeline is arranged in the plunger, a one-way valve is arranged in the tappet body and located at the lower end of the oil passing pipeline, and a reset spring is arranged at the lower end of the one-way valve. A plurality of balls are arranged at the position, making contact with the tappet body, of the side wall of the plunger, and a plurality of mounting holes used for mounting the balls are formed in the side wall of the plunger. The utility model has the advantage of wear resistance.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic tappets, relates to a hydraulic tappet, and particularly relates to a novel hydraulic tappet. Background Art

[0002] The automobile tappet is the main component of the valve mechanism. It is a mechanism that uses oil pressure to transfer the force on the eccentric wheel on the camshaft to the valve. The hydraulic tappet is mainly composed of a plunger, a one-way valve, and a return spring. The tappet is an important component for adjusting the clearance of the engine valve mechanism, and its performance directly affects the performance of the entire engine.

[0003] In actual use, the direct contact between the plunger and the tappet will cause wear between the plunger and the tappet. When the wear time is too long, it is easy to cause problems in the gap adjustment, resulting in unstable operation. Summary of the invention

[0004] The utility model aims to provide a new type of wear-resistant hydraulic tappet in view of the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a new type of hydraulic tappet, including a rocker arm and a tappet body, characterized in that a plunger is arranged inside the tappet body, the tappet body and the plunger are respectively provided with an oil inlet hole one and an oil inlet hole two, an oil passage is arranged inside the plunger, a one-way valve is arranged inside the tappet body and at the lower end of the oil passage, a return spring is arranged at the lower end of the one-way valve, a plurality of balls are arranged on the side wall of the plunger and at the contact with the tappet body, and a plurality of mounting holes for mounting the balls are arranged on the side wall of the plunger.

[0006] In the above-mentioned novel hydraulic tappet, a retaining frame is arranged on the rocker arm and in contact with the plunger, and an oil injection hole is opened on the retaining frame.

[0007] In the above-mentioned novel hydraulic tappet, the second oil inlet hole is connected to the oil passage, and the oil passage is connected to the oil injection hole.

[0008] Compared with the prior art, the utility model changes the original sliding friction between the plunger and the tappet body in direct contact into rolling friction by arranging a plurality of balls on the side wall of the plunger, thereby reducing the wear of the plunger and the tappet body and increasing the service life of the tappet. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a cross-sectional structural schematic diagram of the utility model

[0010] In the figure, 1. rocker arm; 2. tappet body; 3. plunger; 4. oil inlet hole 1; 5. oil inlet hole 2; 6. oil passage; 7. one-way valve; 8. return spring; 9. ball bearing; 10. mounting hole; 11. retaining frame; 12. oil injection hole. DETAILED DESCRIPTION

[0011] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0012] like Figure 1 As shown, the new hydraulic tappet comprises a rocker arm 1 and a tappet body 2, a plunger 3 is arranged inside the tappet body 2, the tappet body 2 and the plunger 3 are respectively provided with an oil inlet hole 1 4 and an oil inlet hole 2 5, an oil passage 6 is arranged inside the plunger 3, a one-way valve 7 is arranged inside the tappet body 2 and at the lower end of the oil passage 6, a return spring 8 is arranged at the lower end of the one-way valve 7, a plurality of balls 9 are arranged on the side wall of the plunger 3 and in contact with the tappet body 2, a plurality of mounting holes 10 for mounting the balls 9 are arranged on the side wall of the plunger 3, a plurality of balls 9 are arranged on the side wall of the plunger 3, the sliding friction between the original direct contact between the plunger 3 and the tappet body 2 is changed to rolling friction, the wear of the plunger 3 and the tappet body 2 is reduced, and the service life of the tappet is increased.

[0013] To be more specific, a retainer 11 is provided on the rocker arm 1 and in contact with the plunger 3 , and an oil injection hole 12 is provided on the retainer 11 .

[0014] To be more specific, the second oil inlet hole 5 is connected to the oil passage 6 , and the oil passage 6 is connected to the oil injection hole 12 .

[0015] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0016] Although the terms such as rocker arm 1, tappet body 2, plunger 3, oil inlet hole 1 4, oil inlet hole 2 5, oil passage 6, check valve 7, return spring 8, ball 9, mounting hole 10, retainer 11, oil injection hole 12 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A novel hydraulic tappet, comprising a rocker arm (1) and a tappet body (2), characterized in that: A plunger (3) is arranged inside the push rod body (2), and the push rod body (2) and the plunger (3) are respectively provided with an oil inlet hole 1 (4) and an oil inlet hole 2 (5). An oil passage (6) is arranged inside the plunger (3), and a one-way valve (7) is arranged inside the push rod body (2) and at the lower end of the oil passage (6). A return spring (8) is arranged at the lower end of the one-way valve (7). A plurality of balls (9) are arranged on the side wall of the plunger (3) and at a contact point with the push rod body (2), and a plurality of mounting holes (10) for mounting the balls (9) are arranged on the side wall of the plunger (3).

2. A novel hydraulic tappet according to claim 1, characterized in that: A retainer (11) is provided on the rocker arm (1) at a position in contact with the plunger (3), and an oil injection hole (12) is provided on the retainer (11).

3. A novel hydraulic tappet according to claim 2, characterized in that: The second oil inlet hole (5) is connected to the oil passage pipeline (6), and the oil passage pipeline (6) is connected to the oil injection hole (12).

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