Cast aluminum piston capable of preventing expansion deformation

Abstract

The utility model relates to the technical field of cast aluminum pistons, in particular to an expansion deformation prevention cast aluminum piston which comprises a piston body, a supporting block and a piston head, the piston head is arranged at the upper end of the piston body, the supporting block is arranged in the piston body, and a cooling structure is arranged on the inner side of the piston body. Heat generated in the operation state can be isolated through the heat insulation layer to prevent the temperature in the piston body from rapidly rising to the height of expansion deformation, then cooling oil is introduced through the liquid inlet pipe, the cooling oil enters the cooling pipeline to cool the cast aluminum piston, and the cooling effect of the cast aluminum piston is improved. And then the liquid outlet pipe discharges the cooled high-temperature cooling oil, and new low-temperature cooling oil enters from the liquid inlet pipe, so that the circulating cooling effect is achieved, the cast aluminum piston is cooled, and the problem that the performance and the service life of an internal combustion engine are affected due to the fact that the piston expands and deforms due to long-time high temperature is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cast aluminum pistons, in particular to an anti-expansion and deformation cast aluminum piston. Background Art

[0002] Cast aluminum pistons have been widely used in internal combustion engines due to their light weight and good thermal conductivity. They are subjected to alternating mechanical and thermal loads and are one of the key components with the worst working conditions in the engine. However, existing devices still have certain defects when used, such as:

[0003] When the device is in use, the cast aluminum piston is exposed to high temperature and high pressure working environment for a long time, which may cause the cast aluminum piston to expand and deform, thereby affecting the performance and service life of the internal combustion engine. Utility Model Content

[0004] The utility model aims to solve the above problems and proposes an anti-expansion deformation cast aluminum piston, which improves the problem that the existing anti-expansion deformation cast aluminum piston is prone to expansion deformation in a high temperature environment.

[0005] A cast aluminum piston that prevents expansion and deformation comprises a piston body, a support block and a piston head: the piston head is arranged at the upper end of the piston body, the support block is arranged inside the piston body, and a cooling structure is arranged inside the piston body;

[0006] The cooling structure comprises a liquid inlet pipe, a liquid outlet pipe and a cooling pipeline. The cooling pipeline is arranged inside the piston body, the lower end of the cooling pipeline is provided with a liquid inlet pipe, and the lower end of the cooling pipeline is provided with a liquid outlet pipe.

[0007] Preferably, a connecting plate is provided at the lower end of the supporting block, and a piston pin is provided inside the connecting plate.

[0008] Preferably, the piston pin passes through the connecting plate, and a sealing ring is provided at the lower end of the piston head, and the sealing ring is embedded and installed inside the piston body.

[0009] Preferably, a mounting block is provided at the lower end of the piston head, the mounting block passes through the piston body, and the mounting block passes through the supporting block.

[0010] Preferably, a fixing screw is provided on the side of the mounting block, the fixing screw is threadedly connected to the connecting plate, and the fixing screw passes through the mounting block.

[0011] Preferably, a connecting rod is provided on the surface of the piston pin, and the connecting rod is rotatably connected to the piston pin.

[0012] Preferably, a connecting cover is provided at the lower end of the connecting rod, and a bearing bush is provided inside the connecting cover.

[0013] Preferably, a heat insulating layer is provided on the surface of the piston body, and a protective shell is provided on the surface of the heat insulating layer.

[0014] The beneficial effects of the utility model are:

[0015] 1. Through the arrangement of the liquid inlet pipe, the cooling pipe, the liquid outlet pipe and the heat insulation layer, when the device is in use, the heat generated in the operating state can be isolated by the heat insulation layer to prevent the temperature inside the piston body from rising rapidly to the height of expansion and deformation, and then the cooling oil is introduced through the liquid inlet pipe to allow the cooling oil to enter the interior of the cooling pipe to cool the cast aluminum piston, and then the liquid outlet pipe discharges the cooled cooling oil with a high temperature, and new cooling oil with a low temperature enters from the liquid inlet pipe, so as to achieve the effect of circulating cooling and cooling, so as to cool the cast aluminum piston, and prevent the problem of expansion and deformation of the piston caused by long-term high temperature, thereby affecting the performance and service life of the internal combustion engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall front-view stereoscopic structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the utility model when viewed from above;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the piston head and the mounting block of the utility model;

[0019] Figure 4 This is a schematic diagram of the piston body and cooling pipeline structure of the utility model;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the connection plate and piston pin installation of the utility model.

[0021] In the figure: 1. Piston body; 2. Piston head; 3. Support block; 4. Connecting plate; 5. Piston pin; 6. Connecting rod; 7. Connecting cover; 8. Bearing; 9. Liquid inlet pipe; 10. Liquid outlet pipe; 11. Cooling pipe; 12. Protective shell; 13. Insulation layer; 14. Mounting block; 15. Fixing screw; 16. Sealing ring; 17. Cooling structure. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] When implementing: Figure 1-5 As shown, an anti-expansion and deformation cast aluminum piston comprises a piston body 1, a support block 3 and a piston head 2: the piston head 2 is arranged at the upper end of the piston body 1, the support block 3 is arranged inside the piston body 1, and a cooling structure 17 is arranged on the inner side of the piston body 1;

[0024] The cooling structure 17 includes a liquid inlet pipe 9, a liquid outlet pipe 10 and a cooling pipe 11. The cooling pipe 11 is arranged inside the piston body 1. The lower end of the cooling pipe 11 is provided with a liquid inlet pipe 9, and the lower end of the cooling pipe 11 is provided with a liquid outlet pipe 10.

[0025] When the device is in use, first, the liquid inlet pipe 9 and the liquid outlet pipe 10 are connected to the cooling water tank. Then, when the temperature of the piston body 1 rises, the coolant is introduced into the cooling pipe 11 through the liquid inlet pipe 9, so that the coolant flows in the cooling pipe 11. Since the cooling pipe 11 is in contact with the inner wall of the piston body 1, the coolant absorbs the heat generated by the operation of the piston body 1 to cool the piston body 1. Then, the coolant whose temperature has increased due to the absorption of heat is discharged through the liquid outlet pipe 10, and re-enters the coolant with a low temperature into the cooling pipe 11 through the liquid inlet pipe 9, so as to realize the circulation cooling of the piston body 1 and prevent the piston body 1 from expanding and deforming due to long-term high temperature.

[0026] A connecting plate 4 is provided at the lower end of the supporting block 3, and a piston pin 5 is provided inside the connecting plate 4;

[0027] The piston pin 5 passes through the connecting plate 4. The lower end of the piston head 2 is provided with a sealing ring 16, which is embedded and installed inside the piston body 1.

[0028] When the device is in use, the connecting rod 6 is connected to the inside of the piston body 1 through the piston pin 5 to connect and install the device, and then the mounting block 14 is inserted into the inside of the piston body 1 and the support block 3 through the piston head 2, and then the piston head 2 embeds the sealing ring 16 into the inside of the piston body 1 to improve the sealing between the piston head 2 and the piston body 1.

[0029] A mounting block 14 is disposed at the lower end of the piston head 2, the mounting block 14 passes through the piston body 1, and the mounting block 14 passes through the support block 3;

[0030] A fixing screw 15 is provided on the side of the mounting block 14, the fixing screw 15 is threadedly connected to the connecting plate 4, and the fixing screw 15 passes through the mounting block 14;

[0031] When the device is in use, the piston head 2 will be worn due to the long-term operation of the piston body 1. When the piston head 2 is severely worn, the performance of the internal combustion engine will be reduced, and the service life of the device will be reduced. When the piston head 2 needs to be replaced, the fixing screw 15 is screwed out, and then the severely worn piston head 2 is pulled out, and the mounting block 14 is pulled out from the inside of the piston body 1, and then the mounting block 14 at the lower end of the new piston head 2 is inserted into the inside of the piston body 1, and penetrates the support block 3, so that the opening on the surface of the support block 3 is aligned with the thread groove on the surface of the connecting plate 4. Then the fixing screw 15 is screwed to the surface of the connecting plate 4 and penetrates the mounting block 14, so as to fix the mounting block 14 and the piston head 2, so as to achieve the purpose of quickly disassembling and replacing the piston head 2, and avoid the problem of replacing the entire piston body 1 due to excessive wear.

[0032] A connecting rod 6 is provided on the surface of the piston pin 5, and the connecting rod 6 is rotatably connected to the piston pin 5;

[0033] A connecting cover 7 is provided at the lower end of the connecting rod 6, and a bearing bush 8 is provided inside the connecting cover 7;

[0034] The surface of the piston body 1 is provided with a heat insulation layer 13, and the surface of the heat insulation layer 13 is provided with a protective shell 12;

[0035] When the device is in use and needs to be installed, the connecting rod 6 is placed between the connecting plates 4, and then the piston pin 5 is installed into the inside of the connecting plate 4 and passes through the upper end of the connecting rod 6 to connect the connecting rod 6 with the piston body 1, and then the lower end of the connecting rod 6 is positioned at the corresponding position, and the connecting cover 7 is fitted with the lower end of the connecting rod 6 to connect and fix the connecting rod 6 to the corresponding position. Then, when the piston body 1 is in operation, heat is generated through the surface of the piston body 1, and the generated heat is blocked by the heat insulation layer 13, so that the temperature inside the piston body 1 will not rise quickly to the temperature that will cause the piston body 1 to heat up.

[0036] When the utility model is in use, firstly, the connecting rod 6 is placed between the connecting plates 4, then the piston pin 5 is installed into the interior of the connecting plate 4 and penetrates the connecting rod 6 to fix the connecting rod 6, then the lower end of the connecting rod 6 is fitted with the position to be connected, and the connecting cover 7 is fitted with the connecting rod 6 to connect and fix, so that the connecting rod 6 is connected to the position to be connected, and then the piston body 1 starts to work, at this time, the liquid inlet pipe 9 inputs the coolant into the cooling pipe 11, so that the coolant flows in the cooling pipe 11 to absorb the heat generated by the piston body 1 when working, so as to cool the piston body 1 and prevent The high temperature causes the piston body 1 to expand and deform. When the device is used for a long time and the piston head 2 is worn and needs to be replaced, the fixing screw 15 is unscrewed, and then the piston head 2 is pulled out from the inside of the piston body 1, and the new piston head 2 is fit with the upper end of the piston body 1, and the mounting block 14 is inserted into the inside of the piston body 1, and passes through the support block 3, and the holes on the surface of the mounting block 14 are aligned with the threaded grooves on the surface of the connecting plate 4, and then the fixing screw 15 is screwed into the inside of the connecting plate 4 to fix the mounting block 14 and the piston head 2, so as to facilitate the disassembly and replacement of the piston head 2.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A cast aluminum piston that prevents expansion and deformation, characterized in that: It comprises a piston body (1), a support block (3) and a piston head (2): the piston head (2) is arranged at the upper end of the piston body (1), the support block (3) is arranged inside the piston body (1), and the inner side of the piston body (1) is provided with a cooling structure (17); The cooling structure (17) comprises a liquid inlet pipe (9), a liquid outlet pipe (10) and a cooling pipeline (11); the cooling pipeline (11) is arranged inside the piston body (1); the liquid inlet pipe (9) is arranged at the lower end of the cooling pipeline (11); and the liquid outlet pipe (10) is arranged at the lower end of the cooling pipeline (11).

2. The anti-expansion and deformation cast aluminum piston according to claim 1, characterized in that: A connecting plate (4) is provided at the lower end of the supporting block (3), and a piston pin (5) is provided inside the connecting plate (4).

3. The anti-expansion and deformation cast aluminum piston according to claim 2, characterized in that: The piston pin (5) passes through the connecting plate (4); a sealing ring (16) is provided at the lower end of the piston head (2); and the sealing ring (16) is embedded and installed inside the piston body (1).

4. The anti-expansion and deformation cast aluminum piston according to claim 2, characterized in that: A mounting block (14) is provided at the lower end of the piston head (2); the mounting block (14) passes through the piston body (1); and the mounting block (14) passes through the support block (3).

5. The anti-expansion and deformation cast aluminum piston according to claim 4, characterized in that: A fixing screw (15) is provided on the side of the mounting block (14), the fixing screw (15) is threadedly connected to the connecting plate (4), and the fixing screw (15) passes through the mounting block (14).

6. The anti-expansion and deformation cast aluminum piston according to claim 2, characterized in that: A connecting rod (6) is provided on the surface of the piston pin (5), and the connecting rod (6) is rotatably connected to the piston pin (5).

7. The anti-expansion and deformation cast aluminum piston according to claim 6, characterized in that: A connecting cover (7) is provided at the lower end of the connecting rod (6), and a bearing bush (8) is provided inside the connecting cover (7).

8. The anti-expansion and deformation cast aluminum piston according to claim 1, characterized in that: A heat insulating layer (13) is provided on the surface of the piston body (1), and a protective shell (12) is provided on the surface of the heat insulating layer (13).

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