A piston
By installing reinforcement inside the piston throat and supporting it through the ring and support ribs, the problem of prone to cracking of the piston throat and the reinforcing member is solved, which significantly improves the throat strength and extends the piston life.
Patent Information
- Application Number
- CN202421486338.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The existing piston throat is prone to cracking, and the reinforcement member is prone to disengagement, resulting in the inability to effectively increase the strength of the throat.
At least one reinforcement is provided inside the throat of the piston, such as a continuous annular or annular reinforcement with a fracture, and the reinforcement is supported by a ring and a support rib to ensure that it is closely connected to the piston body.
By installing reinforcements internally, the strength of the throat is significantly increased, avoiding cracking of the piston during operation, extending the life of the piston, and reducing the occurrence of casting defects.
Smart Images
Figure CN222716979U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pistons, in particular to a piston. Background Art
[0002] As one of the core components of the engine, the engine piston is required to burn the fuel more fully to reduce CO2 emissions as the national emission regulations become stricter. In this case, the compression ratio is usually increased, which improves the combustion efficiency while also increasing the risk of knock in the combustion chamber during engine operation. In this case, the piston faces the challenge of higher mechanical loads, and it is particularly important to increase the life of the piston under high explosion pressure to ensure its safety throughout its life cycle.
[0003] The piston throat is part of the piston top surface. Due to the properties of the aluminum alloy material, the throat is usually convex in shape, has poor heat dissipation and is prone to stress concentration. Because it is exposed in the combustion chamber, it is prone to cracking under the influence of high explosion pressure and high heat load.
[0004] In the prior art, a reinforcement piece is placed on the outer side of the throat to increase the strength of the throat and avoid throat cracking. However, when casting the piston, the aluminum alloy solution does not flow smoothly around the cast iron ring, which easily causes casting defects between the reinforcement piece and the aluminum alloy piston. When the engine is actually running, the casting defects cause the reinforcement piece and the aluminum alloy piston material to separate, thereby failing to achieve the purpose of strengthening the throat strength. Utility Model Content
[0005] An object of the first aspect of the utility model is to provide a piston to solve the problem that the throat of the piston in the prior art is prone to cracking.
[0006] Another object of the first aspect of the present utility model is to solve the problem that the reinforcement member and the throat are easily separated.
[0007] In particular, the utility model provides a piston, comprising:
[0008] A body, a combustion chamber is disposed on the top of the body, and a throat is provided at the opening of the combustion chamber; and
[0009] At least one reinforcement member is disposed within the body at the throat.
[0010] Optionally, each of the reinforcement members is in a continuous ring shape.
[0011] Optionally, each of the reinforcement members is ring-shaped with at least one break.
[0012] Optionally, the number of the fractures of each reinforcement member is 1, which is located at the main thrust side or the auxiliary thrust side of the body.
[0013] Optionally, the number of the fractures of each reinforcement member is 2, which are respectively located at the main thrust side and the auxiliary thrust side of the body.
[0014] Optionally, the size of the fracture of each reinforcement is less than or equal to 1 / 4 of the overall size of the reinforcement.
[0015] Optionally, there are multiple reinforcement members, and the multiple reinforcement members are arranged at positions close to the outer side surface of the throat and along a shape that is the same as the shape of the outer side surface of the throat.
[0016] Optionally, there are multiple reinforcement members, and the multiple reinforcement members are arranged near the throat and arranged along the radial direction of the body.
[0017] Optionally, the radial cross-section of each reinforcement member is selected from a circular, square, pentagonal, hexagonal or elliptical shape.
[0018] Optionally, the reinforcement is made of cast iron or steel.
[0019] Optionally, the body is provided with an annular groove;
[0020] The piston further comprises:
[0021] a ring, the ring being disposed in the annular groove; and
[0022] At least one supporting rib has one end connected to the insert ring and the other end connected to the reinforcement member to support the reinforcement member.
[0023] The solution provides a reinforcement member inside the throat of the combustion chamber of the body, thereby increasing the strength of the throat, preventing the piston from cracking during operation, and increasing the life of the piston. In addition, since the reinforcement member of the solution is provided inside the body, it will not fall off during the manufacturing process together with the body or after the manufacturing is completed, thereby effectively increasing the strength of the throat of the piston.
[0024] In this solution, support ribs are arranged between the insert ring and the reinforcement member, and the support ribs mainly play the role of supporting the reinforcement member during the piston forming process.
[0025] Based on the detailed description of the specific embodiments of the present invention in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other purposes, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:
[0027] Figure 1 is a schematic structural diagram of a piston according to a specific embodiment of the utility model;
[0028] Figure 2 is a partial cross-sectional schematic diagram of a piston according to a specific embodiment of the utility model;
[0029] Figure 3 It is a schematic structural diagram of a reinforcement member, a support rib and a ring according to a specific embodiment of the utility model;
[0030] Figure 4 It is a schematic structural diagram of a reinforcement member, a support rib and a ring according to a specific embodiment of the utility model;
[0031] Figure 5 is a schematic structural diagram of a piston according to another specific embodiment of the utility model;
[0032] Figure 6 is a schematic structural diagram of a reinforcement member, a support rib and a ring according to another specific embodiment of the utility model;
[0033] Figure 7 is a schematic structural diagram of a reinforcement member, a support rib and a ring according to another specific embodiment of the utility model;
[0034] Figure 8 is a schematic structural diagram of a piston according to another specific embodiment of the utility model;
[0035] Fig. 9 is a schematic structural diagram of a reinforcement member, a support rib and a ring according to another specific embodiment of the utility model;
[0036] Fig.10 It is a schematic structural diagram of a reinforcement member, a support rib and an inlay ring according to another specific embodiment of the utility model.
[0037] Description of reference numerals:
[0038] 100-piston; 10-combustion chamber; 110-body; 111-throat; 112-ring groove; 120-reinforcement; 121-fracture; 130-ring; 140-support rib. DETAILED DESCRIPTION
[0039] In the description of this embodiment, it should be understood that the terms "length", "width", "height", "up", "down", "left", "right", "vertical", "horizontal", "bottom", "inside" and "outside" etc. indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0040] As a specific embodiment of the present invention, Figure 1-Figure 2 As shown, this embodiment provides a piston 100, which may include a body 110 and at least one reinforcement member 120. The body 110 has a combustion chamber 10 disposed on the top thereof, the combustion chamber 10 has a throat 111 at the opening thereof, and the at least one reinforcement member 120 is disposed inside the body 110 at the throat 111.
[0041] Specifically, in this embodiment, a reinforcing member 120 is disposed inside the throat 111 of the combustion chamber 10 of the body 110, thereby increasing the strength of the throat 111, preventing the piston 100 from cracking during operation, and increasing the life of the piston 100. In addition, since the reinforcing member 120 of this embodiment is disposed inside the body 110, it will not fall off during the manufacturing process together with the body 110 or after the manufacturing is completed, thereby effectively increasing the strength of the throat 111 of the piston 100.
[0042] As a specific embodiment of the present invention, Figure 3-Figure 4 As shown, each reinforcement member 120 of this embodiment is in a continuous ring shape.
[0043] Specifically, each reinforcement member 120 is in a continuous ring shape, and can be arranged along the throat 111 of the piston 100. And each reinforcement member 120 of this embodiment is preferably in a continuous ring shape. Of course, as other embodiments, it can also be in other continuous shapes, such as hexagonal.
[0044] Specifically, each reinforcement member 120 of the present embodiment is in a continuous ring shape, which can effectively increase the effect of the reinforcement member 120 on improving the strength of the throat 111 .
[0045] As a specific embodiment of the present invention, Figure 5-Figure 7 As shown, each reinforcement member 120 of this embodiment is in a ring shape with at least one break 121 .
[0046] Specifically, since different positions of the throat 111 are subjected to different forces, the risk of cracking of the throat 111 is smaller at the position subjected to less force. Therefore, the reinforcement member 120 of this embodiment is designed to be annular with a break 121, and the break 121 is designed at the position subjected to less force, so as to strengthen the difference in strength of the throat 111, reduce the use of materials, and thus reduce costs. In addition, the reinforcement member 120 is designed to have a break 121, which can improve casting performance and reduce casting defects.
[0047] As a specific embodiment of the present invention, each reinforcement member 120 of this embodiment has one fracture 121 located at the main thrust side or the auxiliary thrust side of the body 110 .
[0048] Specifically, since the throat 111 position of the piston 100 in the main thrust side and the auxiliary thrust side direction in this embodiment is not affected by tensile stress and has a low risk of cracking, the design of the fracture 121 on the main thrust side or the auxiliary thrust side does not affect the reinforcement ability of the reinforcement member 120 for the throat 111.
[0049] As a specific embodiment of the present invention, each reinforcement member 120 of this embodiment has two fractures 121 , which are respectively located at the main thrust side and the auxiliary thrust side of the body 110 .
[0050] Specifically, since the throat 111 of the piston 100 in the main thrust side and the auxiliary thrust side direction is not affected by the tensile stress and has a relatively low risk of cracking, when two fractures 121 are designed, they can correspond to the main thrust side and the auxiliary thrust side respectively, without affecting the reinforcement ability of the reinforcement member 120 for the throat 111.
[0051] As a specific embodiment of the present invention, the size of the fracture 121 of each reinforcement member 120 of this embodiment is less than or equal to 1 / 4 of the overall size of the reinforcement member 120 .
[0052] Specifically, the size of the fracture 121 of this embodiment is designed to be less than or equal to 1 / 4 of the size of the entire reinforcement 120, which satisfies the reinforcement function while preventing the throat 111 from cracking during operation.
[0053] As a specific embodiment of the present invention, Figure 8-Figure 10 As shown, the number of the reinforcement members 120 in this embodiment is multiple, and the multiple reinforcement members 120 are disposed at positions close to the outer side surface of the throat 111 and arranged along the same shape as the outer side surface of the throat 111 .
[0054] Specifically, among the plurality of reinforcing members 120, each reinforcing member 120 may be continuous or may have a break 121. The following description will be made by taking the example that each reinforcing member 120 is continuous.
[0055] Specifically, the reinforcement member 120 of this embodiment can be arranged along the throat 111, and its arrangement position can match the shape of the outer surface of the throat 111. This can further increase the strength of the throat 111, thereby preventing the throat 111 from cracking and ensuring the service life of the piston 100.
[0056] As a specific embodiment of the present invention, the number of the reinforcement members 120 in this embodiment is multiple, and the multiple reinforcement members 120 are arranged near the throat 111 and arranged along the radial direction of the body 110 (such as Figure 8-Figure 10 shown).
[0057] Specifically, since the position of the body 110 above the throat 111 in this embodiment is more susceptible to cracking, if the number of reinforcement members 120 is limited, they can be arranged at the throat 111 first, and then at other positions. Of course, the specific number and arrangement positions can be locally adjusted according to the priority order, thereby increasing the strength of the throat 111 and the surrounding area to prevent cracking of the throat 111 and the nearby position.
[0058] As a specific embodiment of the utility model, the radial cross-section of each reinforcement member 120 of this embodiment is selected from a circular, square, pentagonal, hexagonal or elliptical shape. Of course, as other embodiments, the reinforcement member 120 can also be designed into any shape that can strengthen the strength of the throat 111. Preferably, the shape can be a shape similar to or close to the circular interface formed by the inner wall of the throat 111.
[0059] As a specific embodiment of the present invention, the radial cross-section of each reinforcement member 120 of the present embodiment is circular, and the diameter of the circle is 0.5 mm to 6 mm. For example, the diameter of each reinforcement member 120 can be 0.5 mm, 1 mm, 3 mm or 6 mm. Specifically, the diameters of different reinforcement members 120 can be the same or different.
[0060] As a specific embodiment of the present invention, the minimum distance between each reinforcement member 120 of the present embodiment and the outer side surface of the throat 111 is 3 mm to 20 mm. For example, the minimum distance between the reinforcement member 120 and the outer side surface may be 3 mm, 10 mm or 20 mm. The specific distance between the reinforcement member 120 and the outer side surface of the throat 111 may be designed according to actual needs.
[0061] Specifically, the reinforcement member 120 of this embodiment is made of cast iron or steel, which has a strength greater than that of the body 110 , thereby effectively increasing the strength of the throat 111 and preventing cracking of the throat 111 .
[0062] As a specific embodiment of the present invention, Figure 1-10As shown, the body 110 of this embodiment is provided with an annular groove 112. The piston 100 may further include an insert ring 130 and at least one supporting rib 140. The insert ring 130 is disposed in the annular groove 112. One end of the at least one supporting rib 140 is connected to the insert ring 130, and the other end is connected to the reinforcing member 120 to support the reinforcing member 120.
[0063] Specifically, the main function of the insert ring 130 in this embodiment is to be disposed in the ring groove 112 and to be provided with a piston ring to reduce the friction between the piston ring and the ring groove 112. A support rib 140 is disposed between the insert ring 130 and the reinforcement member 120 to support the reinforcement member 120.
[0064] Specifically, since the reinforcement 120 is arranged in the piston 100, the material of the ring 130 and the reinforcement 120 is the same, and different from the material of the main body 110, during the preparation process, the ring 130 and the reinforcement 120 need to be cast and formed first, and then the ring 130 and the reinforcement 120 are arranged in the mold for casting the main body 110. The reinforcement 120 is small in size and is arranged inside, so the ring 130 is needed to support it. Therefore, the support ribs 140 of this embodiment mainly function to support the reinforcement 120 during the molding process of the piston 100.
[0065] Specifically, in this embodiment, the number of the supporting ribs 140 supporting each reinforcing member 120 may be one or more. The size and number of the supporting ribs 140 may be selected according to actual conditions.
[0066] Specifically, the angle between the support rib 140 and the plane where the center of the bezel 130 is located is 30-60°. Specifically, the angle between the support rib 140 and the plane where the center of the bezel 130 is located can be 30°, 45° or 60°.
[0067] Specifically, before the insert ring 130, the support rib 140 and the reinforcement 120 of this embodiment are cast into the body 110, a transition layer (not shown in the figure) is first plated on the surface. The material of the transition layer can be aluminum alloy. The transition layer is mainly used to increase the temperature inside the reinforcement 120 or the insert ring 130 before the body 110 is formed, so as to adapt to the temperature of the body 110 during the casting process, and help to improve the adhesion and strength between the body 110 and the insert ring 130 and the reinforcement 120. In addition, the size of the reinforcement 120 inside the throat 111 is small, and the aluminum alloy has elasticity, and the risk of cracking is small.
[0068] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the contents disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.
Claims
1. A piston, characterized in that: include: A main body, a combustion chamber is arranged on the top thereof, and a throat is provided at the opening of the combustion chamber; At least one reinforcement member is disposed within the body at the throat.
2. The piston according to claim 1, characterized in that Each of the reinforcement members is in a continuous ring shape.
3. The piston according to claim 1, characterized in that Each of the reinforcing members is in a ring shape with at least one break.
4. The piston according to claim 3, characterized in that The number of the fractures of each reinforcement is one, and the fractures are located at the main thrust side or the auxiliary thrust side of the main body.
5. The piston according to claim 3, characterized in that The number of the fractures of each reinforcement member is 2, which are respectively located at the main thrust side and the auxiliary thrust side of the body.
6. The piston according to claim 4 or 5, characterized in that The size of the fracture of each reinforcement is less than or equal to 1 / 4 of the overall size of the reinforcement.
7. The piston according to any one of claims 1 to 5, characterized in that There are multiple reinforcement members, and the multiple reinforcement members are arranged at positions close to the outer side surface of the throat and along the same shape as the outer side surface of the throat.
8. The piston according to any one of claims 1 to 5, characterized in that There are multiple reinforcement members, and the multiple reinforcement members are arranged near the throat and arranged along the radial direction of the body.
9. The piston according to any one of claims 1 to 5, characterized in that The radial cross-section of each reinforcement member is selected from a circle, a square, a pentagon, a hexagon or an ellipse.
10. The piston according to any one of claims 1 to 5, characterized in that The reinforcement is made of cast iron or steel.
11. The piston according to any one of claims 1 to 5, characterized in that The body is provided with an annular groove; The piston further comprises: a ring, the ring being disposed in the annular groove; and At least one supporting rib has one end connected to the insert ring and the other end connected to the reinforcement member to support the reinforcement member.