Running-in-easy piston ring

Abstract

The utility model discloses an easy-to-run-in piston ring, which comprises a ring body and is characterized in that an oil control inner cutting table is arranged on the upper side surface of the ring body, the excircle of the ring body is arranged to be deviated from a barrel surface, a chromium coating is arranged on the excircle of the ring body in a matched manner, the thickness of the chromium coating is gradually increased from top to bottom, and the barrel surface deviated from the barrel surface is correspondingly formed on the outer surface of the chromium coating. The running-in period is shortened, and oil control is achieved.

Description

Technical Field

[0001] The utility model relates to an improved invention of a piston ring, in particular to an improved invention of an easy-to-run-in piston ring. Background Art

[0002] The piston ring is a metal ring used to be embedded in the piston groove. It is a metal elastic ring with a large outward expansion deformation. It is assembled into the cross section and the corresponding annular groove. The piston ring, which reciprocates and rotates, forms a seal between the outer surface of the ring and the cylinder and between the ring and one side of the ring groove by relying on the pressure difference of the gas or liquid. Usually, the outer end of the piston ring is used to scrape off the excess oil on the cylinder. The corresponding outer end of the piston ring needs to be run-in with the inner wall of the cylinder. However, the contact surface between the outer end of the piston ring and the inner wall of the cylinder is large, resulting in a long running-in period. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a piston ring that is easy to run-in.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: the easy-to-run-in piston ring includes a ring body, which is characterized in that an oil control inscribed platform is provided on the upper side of the ring body, the outer circle of the ring body is set as a barrel surface, a chrome-plated layer is matched on the outer circle of the ring body, and the thickness of the chrome-plated layer gradually increases from top to bottom, and the corresponding outer surface of the chrome-plated layer also forms a barrel surface.

[0005] The upper edge of the outer circle of the ring body is arranged as a chamfer, and a chrome-plated layer is matched on the corresponding chamfer.

[0006] The lower edge of the chrome-plated layer is configured as a chamfer.

[0007] The step surfaces of the inscribed platform are transitioned with rounded corners.

[0008] The curvature of the chrome-plated layer on the barrel side is smaller than the curvature of the ring body on the barrel side.

[0009] The utility model has the beneficial effect that the improved easy-to-run-in piston ring reduces the contact area between the chrome-plated layer and the inner wall of the cylinder body by setting the outer circle of the ring body and the chrome-plated layer that is biased towards the barrel surface, thereby reducing the running-in period of the chrome-plated layer; at the same time, an inscribed platform is set on the upper side of the ring body to achieve oil control. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 For the utility model Figure 1 AA section view. DETAILED DESCRIPTION

[0013] The accompanying drawings show the structure of the utility model, and the following further describes its relevant details in conjunction with the accompanying drawings. Figure 1-2 The easy-to-run-in piston ring includes a ring body 1, a notch is provided on the ring body 1, an oil control inscribed platform 2 is provided on the upper side of the ring body 1 to realize the oil control function, the outer circle of the ring body 1 is set as a barrel surface, a chrome plating layer 3 is matched on the outer circle of the ring body 1, and the thickness of the chrome plating layer 3 gradually increases from top to bottom to meet the sealing and running-in requirements, and the corresponding outer surface of the chrome plating layer 3 also forms a barrel surface. Among them, the outer circle of the ring body 1 with a barrel surface is adapted to the chrome plating layer 3 to form a base support, and the corresponding chrome plating layer 3 is also set to a barrel surface, which reduces the contact surface with the inner wall of the cylinder body and shortens the running-in period.

[0014] As a further improved specific implementation, the upper edge 11 of the outer circle of the ring body 1 is set as a chamfer, and a chrome-plated layer 3 is matched on the corresponding chamfer. The chamfer serves to reduce stress concentration and facilitate assembly.

[0015] As a further improved specific implementation, the lower edge 31 of the chrome-plated layer 3 is configured as a chamfer, which serves to reduce stress concentration and facilitate assembly.

[0016] As a further improved specific implementation, the step surfaces of the inscribed platform 2 are rounded transitions to guide the engine oil.

[0017] As a further improved specific implementation, the curvature of the chrome plating layer 3 is smaller than the curvature of the ring body 1, so as to form a chrome plating layer 3 with a gradually varying thickness, which meets the sealing and running-in requirements.

[0018] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An easy-to-run-in piston ring, comprising a ring body, characterized in that: An oil control inscribed platform is arranged on the upper side of the ring body, the outer circle of the ring body is arranged as a barrel surface, a chrome plating layer is matched on the outer circle of the ring body, and the thickness of the chrome plating layer gradually increases from top to bottom, and the corresponding outer surface of the chrome plating layer also forms a barrel surface.

2. The easy-to-run-in piston ring according to claim 1, characterized in that: The upper edge of the outer circle of the ring body is arranged as a chamfer, and a chrome-plated layer is matched on the corresponding chamfer.

3. The easy-to-run-in piston ring according to claim 1, characterized in that: The lower edge of the chrome-plated layer is configured as a chamfer.

4. The easy-to-run-in piston ring according to claim 1, characterized in that: The step surfaces of the inscribed platform are transitioned with rounded corners.

5. The easy-to-run-in piston ring according to claim 1, characterized in that: The curvature of the chrome-plated layer on the barrel side is smaller than the curvature of the ring body on the barrel side.

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