Precise spring for engine steel lining

Abstract

A precision spring for an engine steel lining comprises a precision clamp spring, an engine cylinder body and an engine cylinder sleeve, a through hole is formed in the engine cylinder body, the engine cylinder sleeve is coaxially arranged in the through hole, a first limiting sleeve is arranged on the outer side wall of the engine cylinder sleeve, and a second limiting sleeve is arranged at the lower end of the outer side wall of the engine cylinder sleeve. A first limiting groove is formed in a through hole of the engine cylinder body, a precise clamping spring is arranged between the top of the engine cylinder sleeve and the top of the first limiting groove and comprises a first clamping spring and a second clamping spring, a buffering inclined face is arranged at the bottom end of the first clamping spring, and a containing groove is formed in the middle of the outer side of the first clamping spring. A second clamping spring is arranged in the containing groove, fixing blocks are arranged on the two sides of a notch of the precise clamping spring, and positioning holes are formed in the fixing blocks. Through the arrangement of the buffer inclined plane at the bottom of the first clamp spring, the force borne by the precision clamp spring can be reduced, the strength of the first clamp spring can be improved through the second clamp spring arranged on the first clamp spring, and the service life of the precision clamp spring is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the field of springs, in particular to a precision spring for engine steel linings. Background Art

[0002] The cylinder liner retaining spring of a gasoline engine is used to fix the position of the cylinder liner in the cylinder body to ensure the normal operation of the engine piston. If the retaining spring is deformed, it will easily affect the performance of the engine and may even cause damage to the engine.

[0003] At present, a Chinese patent with the authorization announcement number CN205559477U discloses an engine piston pin retaining spring structure, including an elastic ring, an opening is provided on the elastic ring, and the two ends of the opening are respectively bent toward the center of the elastic ring to form a first bending part and a second bending part, through holes are distributed on the first bending part and the second bending part, and a limit rotating rod that can rotate toward the second bending part is provided on the first bending part, and a pin body that can match the through hole on the second bending part is provided at the end of the limit rotating rod. The utility model aims to provide an engine piston pin retaining spring structure that is easy to identify and disassemble.

[0004] The above-mentioned prior art solution has the following defects: although the retaining spring is easy to disassemble, it is not strong enough and is easily damaged during the high-intensity reciprocating stroke of the engine piston, and has a short service life. Utility Model Content

[0005] The utility model aims to provide a precision spring for an engine steel liner to solve the problems existing in the above-mentioned prior art.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A precision spring for an engine steel liner comprises a precision circlip, an engine cylinder block and an engine cylinder liner, wherein the engine cylinder block is provided with a through hole, the through hole is coaxially provided with an engine cylinder liner, an outer side wall of the engine cylinder liner is provided with a first limiting sleeve, the first limiting sleeve is provided at the top end of the outer side wall, and a second limiting sleeve is provided at the lower end of the outer side wall;

[0008] A first limiting groove is provided in the through hole of the engine cylinder body;

[0009] A precision retaining spring is arranged between the top of the engine cylinder liner and the top of the first limiting groove, and the precision retaining spring includes a first retaining spring and a second retaining spring. A buffer slope is arranged at the bottom end of the first retaining spring, and a receiving groove is arranged at the middle position of the outer side of the first retaining spring. The second retaining spring is arranged in the receiving groove. Fixed blocks are arranged on both sides of the notch of the precision retaining spring, and positioning holes are arranged on the fixed blocks.

[0010] By adopting the above technical solutions, through the interlocking arrangement of the first snap ring and the second snap ring, the strength of the first snap ring can be further enhanced by the second snap ring, ensuring that the speed of deformation can be slowed down during the high-strength reciprocating stroke of the piston. A buffer inclined surface is further provided at the bottom of the remote snap ring. Since the force received by the piston when pressing down the precision snap ring is greater than the force received when the piston lifts the precision spring, the buffer inclined surface can reduce the vertical component force received at the bottom of the first snap ring, increase the parallel component force, and reduce the friction force received during this process, greatly extending the service life of the precision snap ring.

[0011] In a further embodiment, the engine cylinder liner includes a cylinder liner body and a lining. The lining is disposed on the inner wall of the cylinder liner, and the cylinder liner body and the lining are in interference fit.

[0012] By adopting the above technical solutions, the inner surface of the cylinder liner is directly affected by high-temperature and high-pressure combustion gas, and always undergoes high-speed sliding friction with the piston ring and the piston skirt. The outer surface is in contact with the cooling water, generating serious thermal stress under a large temperature difference and being corroded by the cooling water. Adding a lining can further protect the cylinder block.

[0013] In a further embodiment, the material of the lining is manganese alloy.

[0014] By adopting the above technical solutions, manganese alloy has high strength, excellent stiffness and heat resistance, and also has good wear resistance.

[0015] In a further embodiment, the inner diameter of the precision snap ring is the same as the diameter of the engine cylinder liner.

[0016] By adopting the above technical solutions, the precision snap ring can be more firmly consistent with the engine cylinder liner, reducing unnecessary wear that may occur during the piston movement.

[0017] In a further embodiment, chamfered edges are provided on the edges of the fixing blocks of the precision snap ring to avoid scratching the engine cylinder block.

[0018] By adopting the above technical solutions, chamfered edges are provided on the fixing blocks that are easy to install, which can reduce the probability of scratching the engine cylinder block and protect the safety of the inner wall of the engine cylinder block to a greater extent.

[0019] In a further embodiment, a reinforcing block is provided at the inner bottom of the first limiting groove.

[0020] By adopting the above technical solutions, providing a reinforcing block at a position where it is easily damaged and deformed can enhance the strength of the engine cylinder liner and further extend the service life of the engine cylinder liner.

[0021] In summary, the present utility model has the following beneficial effects:

[0022] 1. By setting the buffer slope, it can reduce the vertical component force received by the bottom of the first snap ring, convert this part of the vertical component force into a parallel component force, and at the same time reduce the friction force received by the bottom of the first snap ring during this process, achieving the effect of extending the service life of the precision snap ring;

[0023] 2. By setting the first snap ring and the second snap ring, it can play a role in strengthening and reinforcing by means of the second snap ring embedded in the accommodating groove in the middle position of the first snap ring. The second snap ring itself does not contact the engine cylinder liner, but it will disperse part of the force received by the first snap ring, thus achieving the effect of improving the overall strength;

[0024] 3. By setting the precision snap ring, it can limit and fix the engine cylinder liner during the movement of the piston, and at the same time avoid the collision between the engine cylinder liner and the engine cylinder block, playing a buffering role. The surface of the precision snap ring has been treated with zinc plating passivation, which can form a protective film to prevent the precision snap ring from being affected by corrosion and other problems during operation. Description of the Drawings

[0025] Figure 1 is the overall schematic diagram of the present utility model;

[0026] Figure 2 is the schematic diagram showing the internal structure of the engine cylinder block in the present utility model;

[0027] Figure 3 is the schematic diagram showing the structure of the precision snap ring in the present utility model.

[0028] In the figure, 1, precision snap ring; 11, first snap ring; 12, second snap ring; 13, buffer slope; 14, fixing block; 2, engine cylinder block; 3, engine cylinder liner; 31, cylinder liner body; 32, inner liner; 4, first limiting sleeve; 5, second limiting sleeve; 6, reinforcing block. Detailed Embodiment

[0029] The following further describes the present utility model in detail with reference to the drawings.

[0030] Among them, the same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the attached Figure 1In the directions, the terms "bottom surface" and "top surface", "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this specification, "a plurality" means two or more unless otherwise specifically defined.

[0031] Embodiment:

[0032] As Figures 1 - 3 shown, a precision spring for an engine steel liner includes a precision snap ring, an engine cylinder block, and an engine cylinder liner. The precision snap ring includes a first snap ring and a second snap ring. A buffer inclined surface is provided at the bottom end of the first snap ring. A receiving groove is provided at the middle position on the outer side of the first snap ring. The second snap ring is provided in the receiving groove. Fixed blocks are provided on both sides of the notch of the precision snap ring, and positioning holes are provided on the fixed blocks. The inner diameter of the precision snap ring is consistent with the diameter of the engine cylinder liner. Chamfered corners are provided on the edges of the fixed blocks of the precision snap ring to prevent scratching the engine cylinder block. By the second snap ring embedded in the first snap ring, the strength of the first snap ring itself can be greatly improved, and at the same time, the second snap ring can also share and bear a part of the force, thereby increasing the service life of the first snap ring. The fixed blocks are mainly for facilitating the installation of the precision snap ring by a snap ring pliers. The positioning holes above are also for cooperating with the snap ring pliers. The consistent inner diameter of the precision snap ring and the diameter of the engine cylinder liner can enhance its tightness and ensure the effectiveness of its limiting.

[0033] As Figures 1 - 3 shown, a through hole is provided on the engine cylinder block. An engine cylinder liner is coaxially provided in the through hole. A first limiting sleeve is provided on the outer side wall of the engine cylinder liner. The first limiting sleeve is provided at the top end of the outer side wall. A second limiting sleeve is provided at the lower end of the outer side wall. A first limiting groove is provided in the through hole of the engine cylinder block. A precision snap ring is provided between the top of the engine cylinder liner and the top of the first limiting groove. An enhancing block is provided at the inner bottom of the first limiting groove. The engine cylinder liner includes a cylinder liner body and a lining. The lining is provided on the inner wall of the cylinder liner. The cylinder liner body and the lining are in interference fit. The material of the lining is manganese alloy. The engine cylinder liner is mainly used to accommodate the movement of the piston and needs to be limited by the precision snap ring to prevent the engine cylinder liner from being taken away from the engine cylinder block during the reciprocating stroke movement of the piston. Therefore, the engine cylinder liner needs to be directly affected by high-temperature and high-pressure gas and always undergoes high-speed sliding friction with the piston ring and the piston skirt. Therefore, adding a layer of lining can further protect the cylinder block. The lining and the cylinder block are in interference fit to ensure the tightness of their connection.

[0034] Specific implementation process: First, the engine cylinder liner 3 is arranged in the engine block. An interference-fit inner liner 32 has been pre-set inside the engine cylinder liner 3. The inner liner 32 is used to reduce the wear of the engine cylinder liner 3 during the piston movement. The inner liner 32 is made of manganese alloy material, which has good strength, high temperature resistance, wear resistance, and certain corrosion resistance, and can enhance the service life of the engine cylinder liner 3. A first limiting groove is arranged on the inner wall of the engine block 2. The first limiting groove mainly cooperates with the precision snap ring 1 to limit the reciprocating movement of the engine cylinder liner 3 and prevent the engine cylinder liner 3 from being taken away from the engine block 2 by the piston. A buffer inclined surface 13 is arranged at the bottom of the first snap ring 11 that constitutes the precision snap ring 1. The buffer inclined surface 13 inclines inward, which can convert a part of the received vertical component force into a parallel component force and reduce the friction force received by the buffer inclined surface 13. A second snap ring 12 is embedded in the accommodation groove arranged in the middle part on the outer side of the first snap ring 11. The second snap ring 12 can strengthen the first snap ring 11 and share a part of the received force.

[0035] In the embodiments disclosed in the present invention, terms such as "installation", "connection", "coupling", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "coupling" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments disclosed in the present invention can be understood according to specific circumstances.

[0036] This specific embodiment is only an explanation of the present invention, and it does not limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A precision spring for an engine steel liner, comprising a precision circlip (1), an engine cylinder block (2) and an engine cylinder liner (3), characterized in that: The engine cylinder block (2) is provided with a through hole, an engine cylinder liner (3) is coaxially arranged in the through hole, a first limiting sleeve (4) is arranged on the outer wall of the engine cylinder liner (3), the first limiting sleeve (4) is arranged at the top end of the outer wall, and a second limiting sleeve (5) is arranged at the lower end of the outer wall; A first limiting groove is arranged in the through hole of the engine cylinder body (2); A precision retaining spring (1) is arranged between the top of the engine cylinder sleeve (3) and the top of the first limiting groove, and the precision retaining spring (1) comprises a first retaining spring (11) and a second retaining spring (12). A buffer slope (13) is arranged at the bottom end of the first retaining spring (11), and a receiving groove is arranged at the middle position of the outer side of the first retaining spring (11), and the second retaining spring (12) is arranged in the receiving groove. Fixed blocks (14) are arranged on both sides of the notch of the precision retaining spring (1), and positioning holes are arranged on the fixed blocks (14).

2. The precision spring for engine steel lining according to claim 1, characterized in that: The engine cylinder liner (3) comprises a cylinder liner body (31) and an inner liner (32); the inner liner (32) is arranged on the inner wall of the cylinder liner body (31); the cylinder liner body (31) and the inner liner (32) are interference fit.

3. The precision spring for engine steel lining according to claim 2, characterized in that: The material of the lining (32) is manganese alloy.

4. The precision spring for engine steel lining according to claim 1, characterized in that: The inner diameter of the precision retaining ring (1) is consistent with the diameter of the engine cylinder liner (3).

5. The precision spring for engine steel lining according to claim 4, characterized in that: The edges of the fixing block (14) of the precision retaining spring (1) are all provided with chamfered corners to avoid scratching the engine cylinder block (2).

6. The precision spring for engine steel lining according to claim 1, characterized in that: A reinforcing block (6) is provided at the inner bottom of the first limiting groove.

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