Internal combustion engine piston heat treatment device

Abstract

The utility model discloses an internal combustion engine piston heat treatment device which comprises a heating furnace. The rotating shaft is rotationally inserted into the bottom of the heating furnace, a crankshaft is fixedly arranged at the bottom of the rotating shaft, and a placement seat is fixedly mounted at the top of the rotating shaft; according to the utility model, the crankshaft is used for driving the rotating shaft and the placing seat to rotate, so that the piston does circular motion in the heating furnace, each part of the piston is ensured to be uniformly heated, the heat treatment uniformity is ensured, the heat treatment efficiency is improved, and the service life of the piston is prolonged. The crankshaft rotates to drive the sealing plug to slide in the air cylinder, circulation that hot air in the heating furnace is sucked into the air cylinder from the bottom and then exhausted from the top is achieved by means of the one-way flowing characteristic of the air inlet pipe and the air outlet pipe, temperature distribution in the furnace is made to be more uniform, and therefore the problem that surface treatment is not comprehensive due to uneven heating is effectively avoided; and adverse effects on subsequent processing and use are reduced.

Description

Technical Field

[0001] This utility model relates to the field of piston manufacturing technology, and in particular to a heat treatment device for internal combustion engine pistons. Background Technology

[0002] The piston is a reciprocating component in the cylinder block of a car engine. The basic structure of a piston can be divided into the top, head, and skirt. The piston top is the main part that makes up the combustion chamber, and its shape depends on the type of combustion chamber used. During piston manufacturing, heat treatment is required.

[0003] Currently, when heat treatment equipment heats pistons, it is common to directly place the piston into the heating furnace. This method results in uneven heating of the piston, making it impossible for heat to penetrate evenly to all parts of the piston, which affects subsequent processing and use. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0005] An internal combustion engine piston heat treatment device, comprising:

[0006] Heating furnace;

[0007] A rotating shaft is rotatably inserted into the bottom of the heating furnace. A crankshaft is fixedly installed at the bottom of the rotating shaft, and a mounting base is fixedly installed at the top of the rotating shaft.

[0008] The air extraction assembly includes a cylinder fixedly disposed at the bottom of the heating furnace and a sealing plug slidably disposed inside the cylinder. A movable rod is rotatably connected to one end of the sealing plug facing the crankshaft. The end of the movable rod away from the sealing plug is rotatably connected to the crankshaft through a movable sleeve. A one-way flow air inlet pipe is connected to the end of the cylinder away from the crankshaft. The other end of the air inlet pipe is connected to the bottom side of the heating furnace. A one-way flow air outlet pipe is connected to the end of the cylinder and below the air inlet pipe. The other end of the air outlet pipe is connected to the top side of the heating furnace.

[0009] As an improvement to the above technical solution, it also includes a motor, wherein a transmission belt is connected between the output shaft of the motor and the bottom of the crankshaft.

[0010] As an improvement to the above technical solution, multiple sets of springs are fixedly installed on the inner wall of the placement seat, and a limit plate is fixedly connected to the end of the spring away from the placement seat.

[0011] As an improvement to the above technical solution, the bottom of the placement base is provided with multiple sets of through holes.

[0012] The beneficial effects of this utility model are:

[0013] The crankshaft drives the rotating shaft and the mounting seat to rotate, causing the piston to move in a circular motion inside the heating furnace. This ensures that all parts of the piston are heated evenly, guaranteeing uniform heat treatment. The crankshaft rotation drives the sealing plug to slide inside the cylinder. Utilizing the unidirectional flow characteristics of the inlet and outlet pipes, hot air inside the heating furnace is drawn into the cylinder from the bottom and discharged from the top, promoting a more uniform temperature distribution within the furnace. This effectively avoids incomplete surface treatment caused by uneven heating, reducing adverse effects on subsequent processing and use. Attached Figure Description

[0014] Figure 1 This is a front view of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the air extraction component of this utility model.

[0016] Reference numerals: 10, heating furnace; 20, motor; 21, rotating shaft; 22, crankshaft; 30, cylinder; 31, moving rod; 32, sealing plug; 33, air inlet pipe; 34, air outlet pipe; 40, placement seat; 41, spring; 42, limit plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] An internal combustion engine piston heat treatment device, comprising:

[0019] Heating furnace 10;

[0020] A rotating shaft 21 is rotatably inserted into the bottom of the heating furnace 10. A crankshaft 22 is fixedly installed at the bottom of the rotating shaft 21, and a placement seat 40 is fixedly installed at the top of the rotating shaft 21.

[0021] The air extraction assembly includes a cylinder 30 fixedly disposed at the bottom of the heating furnace 10 and a sealing plug 32 slidably disposed inside the cylinder 30. A movable rod 31 is rotatably connected to one end of the sealing plug 32 facing the crankshaft 22. The end of the movable rod 31 away from the sealing plug 32 is rotatably connected to the crankshaft 22 through a movable sleeve. A one-way flow air inlet pipe 33 is connected to one end of the cylinder 30 away from the crankshaft 22. The other end of the air inlet pipe 33 is connected to the bottom side of the heating furnace 10. A one-way flow air outlet pipe 34 is connected to the end of the cylinder 30 and below the air inlet pipe 33. The other end of the air outlet pipe 34 is connected to the top side of the heating furnace 10.

[0022] Specifically, the internal combustion engine piston is placed on the mounting seat 40, and the heating furnace 10 is started, gradually raising its internal temperature to the piston heat treatment temperature. External force drives the crankshaft 22 to rotate, which in turn drives the rotating shaft 21 to rotate synchronously. This causes the mounting seat 40, mounted on top of the rotating shaft 21, to rotate. The mounting seat 40 drives the piston to perform circular motion within the heating furnace 10, ensuring uniform heating of all parts of the piston and guaranteeing the uniformity of the heat treatment. As the crankshaft 22 rotates, the crankshaft 22, via the movable rod 31, pulls the sealing plug 32 to slide within the cylinder 30. When the sealing plug 32 slides closer to the crankshaft 22, a negative pressure is formed in the area between the sealing plug 32 and the inner wall of the cylinder 30 at the end away from the crankshaft 22. Due to the intake air… Pipe 33 is unidirectional and connected to the bottom of the heating furnace 10. Under the action of air pressure difference, the hot air at the bottom of the heating furnace 10 is drawn into the cylinder 30 through the inlet pipe 33. When the crankshaft 22 continues to rotate, it drives the movable rod 31 to push the sealing plug 32 to slide away from the crankshaft 22. The area formed by the sealing plug 32 and the inner wall of the cylinder 30 away from the crankshaft 22 is compressed. Because the outlet pipe 34 is unidirectional and connected to the top of the heating furnace 10, the compressed hot air is discharged into the top of the heating furnace 10 through the outlet pipe 34. In this way, the hot air forms a circulation in the heating furnace 10. The hot air at the bottom is extracted and transported to the top, which makes the temperature distribution in the heating furnace 10 more uniform and further improves the quality of piston heat treatment.

[0023] In one embodiment, the motor 20 is also included. A transmission belt is connected between the output shaft of the motor 20 and the bottom of the crankshaft 22. When the motor 20 is powered on, the rotation of the output shaft of the motor 20 is transmitted to the crankshaft 22 through the transmission belt, thereby driving the crankshaft 22 to rotate.

[0024] In one embodiment, multiple sets of springs 41 are fixedly provided on the inner wall of the placement seat 40. The end of the spring 41 away from the placement seat 40 is fixedly connected to a limiting plate 42. Before the internal combustion engine piston is placed on the placement seat 40, the limiting plate 42 is pushed to move away from each other, compressing the spring 41 and placing the internal combustion engine piston in the area enclosed by the limiting plate 42. Then the limiting plate 42 is released. Under the restoring elastic force of the spring 41, the spring 41 drives the limiting plate 42 to move, clamping and limiting the piston, thereby improving the stability of the piston placement when the placement seat 40 rotates.

[0025] In one embodiment, the bottom of the placement seat 40 has multiple sets of through holes. The presence of the through holes significantly reduces the area covered by the piston bottom, allowing hot air to contact the piston bottom more directly and comprehensively. This ensures that the piston bottom is heated synchronously with other parts, greatly improving the uniformity of piston heating and optimizing the heat treatment effect.

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A heat treatment device for internal combustion engine pistons, characterized in that, include: Heating furnace (10); A rotating shaft (21) is rotatably inserted into the bottom of the heating furnace (10). A crankshaft (22) is fixedly installed at the bottom of the rotating shaft (21), and a placement seat (40) is fixedly installed at the top of the rotating shaft (21). The air extraction assembly includes a cylinder (30) fixedly disposed at the bottom of the heating furnace (10) and a sealing plug (32) slidably disposed inside the cylinder (30). The end of the sealing plug (32) facing the crankshaft (22) is rotatably connected to a movable rod (31). The end of the movable rod (31) away from the sealing plug (32) is rotatably connected to the crankshaft (22) through a movable sleeve. The end of the cylinder (30) away from the crankshaft (22) is connected to a unidirectional air intake pipe (33). The other end of the air intake pipe (33) is connected to the bottom of one side of the heating furnace (10). The end of the cylinder (30) and below the air intake pipe (33) is connected to a unidirectional air outlet pipe (34). The other end of the air outlet pipe (34) is connected to the top of one side of the heating furnace (10).

2. The heat treatment apparatus for internal combustion engine pistons according to claim 1, characterized in that: It also includes a motor (20), the output shaft of which is connected to the bottom of the crankshaft (22) by a transmission belt.

3. The internal combustion engine piston heat treatment device according to claim 2, characterized in that: The inner wall of the placement seat (40) is fixedly provided with multiple sets of springs (41), and the end of the spring (41) away from the placement seat (40) is fixedly connected to a limiting plate (42).

4. The heat treatment apparatus for internal combustion engine pistons according to claim 1, characterized in that: The bottom of the placement base (40) has multiple sets of through holes.

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