Automobile engine piston mechanism

Abstract

The utility model relates to the technical field of automobile engines, in particular to a piston mechanism of an automobile engine. The novel automobile engine piston mechanism solves the problem that a piston pin and a connecting rod of an existing engine piston mechanism are difficult to assemble, a positioning assembly is arranged in a piston, and the positioning assembly comprises a limiting frame, a vertical rod, a horizontal sliding block, a vertical square frame, a fixed rod and a movable block. Through cooperation of a limiting frame, a vertical rod, a horizontal sliding block, a fixing rod, a first spring, a limiting plate and other structures, positioning of the connecting rod is achieved, installation of the piston pin and the connecting rod is facilitated, therefore, installation convenience is improved, and the installation efficiency of the piston pin and the connecting rod is greatly improved; in addition, the mechanism is high in practicability, free of complex and high-cost structural components and low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile engines, in particular to a piston mechanism of an automobile engine. Background Art

[0002] A car engine is a device that provides power for a car. Depending on the power source, car engines can be divided into diesel engines, gasoline engines, electric vehicle motors, and hybrid power. Common gasoline engines and diesel engines are both reciprocating piston internal combustion engines, which convert the chemical energy of the fuel into the mechanical energy of piston movement and output power to the outside.

[0003] One of the main mechanisms in a car engine is the piston mechanism inside the engine, which mainly uses the reciprocating motion of the piston in the cylinder to convert the chemical energy of the fuel into mechanical energy. The existing engine piston mechanism includes a cylinder, a piston, a piston pin, and a connecting rod. The piston is installed in the cylinder, and a piston pin is installed in the piston. A connecting rod is provided on the middle movable sleeve of the outer surface of the piston pin, and the lower end of the connecting rod is connected to the crankshaft. During the assembly process, the assembly of the piston pin and the connecting rod is relatively difficult. Since the piston pin and the connecting top connecting part are both located in the piston, when assembling the piston pin and the connecting rod, on the one hand, the line of sight is easily obstructed, and on the other hand, the connecting rod cannot be positioned, which makes the assembly of the piston pin and the connecting rod relatively difficult. Summary of the Invention

[0004] In order to solve the problem that the piston pin and the connecting rod of the existing engine piston mechanism are difficult to assemble, the utility model provides a new automobile engine piston mechanism.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] A car engine piston mechanism includes a piston, a connecting rod, a piston pin, a cylinder, and a crankshaft. A piston pin is installed in the piston, and a connecting rod is provided on the middle movable sleeve of the outer surface of the piston pin. A positioning assembly is provided in the upper space above the piston pin in the piston. The positioning assembly includes a limit frame, a vertical rod, a horizontal slider, a vertical frame, a fixed rod, and a movable block. The limit frame is fixed to the bottom surface of the upper space in the piston, the vertical rod is connected to the limit frame by sliding up and down, and a limit portion for limiting the falling position of the vertical rod is provided on the vertical rod. The vertical frame is fixed to the top surface of the upper space in the piston, the left end of the fixed rod is fixed to the left side of the vertical frame, the left end of the horizontal slider is connected to the right side of the vertical frame by sliding left and right, and the horizontal slider is fixed to the top surface of the upper space in the piston. The left end portion is provided with a sliding groove, and the right end portion of the fixed rod is connected to the sliding groove of the horizontal sliding rod for left and right sliding movement. A first spring is provided between the right side surface of the sliding groove and the right end surface of the fixed rod, and a jacking slot is provided in the middle of the horizontal sliding block. The right side surface of the top end portion of the vertical rod is provided with an upper chamfered inclined surface for entering the jacking slot after squeezing the right end portion of the horizontal sliding rod when the piston pin is installed. The left side surface of the bottom end portion of the vertical rod is provided with a lower chamfered inclined surface abutting the piston pin. The movable block is connected to the vertical frame for up and down sliding, and the bottom end of the movable block passes through to the outside and bottom of the vertical frame. A connecting rod is hinged between the movable block and the bottom surface of the left end portion of the horizontal sliding block, and limit plates for positioning the connecting rod installation position are fixed on the front and rear sides of the bottom end portion of the movable block.

[0007] During installation, the connecting rod is placed in the piston and contacts the two limit plates of the positioning assembly. At this time, the connecting rod installation position is positioned, and then the operator inserts the piston pin into the piston. The piston pin passes through the hole at the top of the connecting rod and continues to push the piston pin. The piston pin contacts the lower chamfered surface at the bottom end of the vertical rod, and continues to push the piston pin. The vertical rod moves up and down. At the same time, the upper chamfered surface at the top end of the vertical rod will also squeeze the right end of the horizontal slide rod, and then enter the top slot. At this time, the horizontal slide rod moves to the left and stretches the first spring, thereby driving the connecting rod to move. The connecting rod pulls the movable block upward, thereby driving the limit plate upward to separate the connecting rod from the limit plate (after the movable pin and connecting rod are installed, if the connecting rod and the limit plate are not separated, it will cause connecting rod wear, so the limit plate only works during installation, and it needs to be retracted after installation to avoid connecting rod wear).

[0008] Furthermore, a vertically arranged fixing plate is fixed to the right end of the lower space in the piston for mounting the piston pin. The left end surface of the fixing plate is connected to a circular plate via a second spring. The circular plate slides left and right in the lower space in the piston. The left end of the piston pin and the piston are positioned and fixed by a fixing screw. When the piston pin needs to be removed, the fixing screw is removed, and the piston pin is ejected due to the action of the second spring, making it easier to remove the piston pin.

[0009] Furthermore, a limiting block is fixed on the outer circumference of the circular plate, and a limiting groove adapted to the limiting block is provided in the piston. This structure is used to limit the moving position of the circular plate.

[0010] Furthermore, a rotating handle is fixed to the bottom end of the fixing screw to facilitate disassembly and assembly of the fixing screw.

[0011] Furthermore, the limiting frame is an inverted U-shaped frame, and a sliding hole is provided on the top of the inverted U-shaped frame for sliding up and down with the vertical rod. The structure of the limiting frame is specific and standardized, and the structure is simple and easy to implement.

[0012] Furthermore, the movable block is T-shaped as a whole, has a simple structure, and is easy to implement.

[0013] The beneficial effects produced by the present invention are as follows: the present invention cleverly realizes the positioning of the connecting rod through the coordination of structures such as the vertical rod, the horizontal sliding block, the fixed rod, the first spring, and the limit plate, thereby facilitating the installation of the piston pin and the connecting rod, thereby improving the convenience of installation and greatly improving the installation efficiency of the piston pin and the connecting rod; in addition, the mechanism is highly practical, has no complex and high-cost structural components, and has low manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic cross-sectional structural diagram of the front side of the piston body of the present invention;

[0018] Figure 3 This is a schematic cross-sectional view of the side of the piston body of the utility model;

[0019] Figure 4 for Figure 2 Schematic diagram of the local enlarged structure at A in the middle;

[0020] Figure 5 for Figure 2 Schematic diagram of the local enlarged structure at B in the middle;

[0021] Figure 6 for Figure 3 Schematic diagram of the locally enlarged structure at point C in the middle.

[0022] In the figure: 1-piston, 2-piston pin, 3-vertical rod, 4-limiting frame, 5-horizontal slider, 6-vertical frame, 7-fixing rod, 8-first spring, 9-connecting rod, 10-movable block, 11-limiting plate, 12-fixing plate, 13-second spring, 14-circular plate, 15-limiting groove, 16-limiting block, 17-fixing screw, 18-rotating handle, 19-limiting part, 20-cylinder, 21-connecting rod, 22-crankshaft, 23-jacking groove. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0024] In the description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance. It should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms based on specific circumstances.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0027] like Figure 1 、 2, 3, 4, 6 A piston mechanism of an automobile engine, comprising a piston 1, a connecting rod 21, a piston pin 2, a cylinder 20, and a crankshaft 22. A piston pin 2 is installed in the piston 1, and a connecting rod 21 is provided on the middle movable sleeve of the outer surface of the piston pin 2. A positioning assembly is provided in the upper space above the piston pin 2 in the piston 1, and the positioning assembly comprises a limit frame 4, a vertical rod 3, a horizontal slider 5, a vertical frame 6, a fixed rod 7, and a movable block 10. The limit frame 4 is fixed to the bottom surface of the upper space in the piston 1, the vertical rod 3 is connected to the limit frame 4 by sliding up and down, and a limit portion 19 for limiting the falling position of the vertical rod 3 is provided on the vertical rod 3. The vertical frame 6 is fixed to the top surface of the upper space in the piston 1, the left end of the fixed rod 7 is fixed to the left side of the vertical frame 6, and the left end of the horizontal slider 5 is connected to the right side of the vertical frame 6 by sliding left and right. The left end of the horizontal slider 5 is provided with a slide groove, and the right end of the fixed rod 7 is connected to the slide groove of the horizontal slider for left and right sliding. A first spring 8 is provided between the right side surface of the slide groove and the right end surface of the fixed rod 7. A jacking slot 23 is provided in the middle of the horizontal slider 5. The right side surface of the top end of the vertical rod 3 is provided with an upper chamfered inclined surface for entering the jacking slot 23 after squeezing the right end of the horizontal slider when the piston pin 2 is installed. The left side surface of the bottom end of the vertical rod 3 is provided with a lower chamfered inclined surface abutting against the piston pin 2. The movable block 10 is connected to the vertical frame 6 for sliding up and down, and the bottom end of the movable block 10 passes through the outside and bottom of the vertical frame 6. A connecting rod 9 is hinged between the movable block 10 and the bottom surface of the left end of the horizontal slider 5. Limiting plates 11 for positioning the installation position of the connecting rod 21 are fixed on both sides of the front and rear of the bottom end of the movable block 10.

[0028] When the piston pin 2 is inserted into the piston 1, the piston pin 2 passes through the hole at the top of the connecting rod 21, and the piston pin 2 continues to push the piston pin 2. The piston pin 2 abuts against the lower chamfered surface at the bottom end of the vertical rod 3, and the piston pin 2 continues to push the piston pin 2, and the vertical rod 3 moves up and down. At the same time, the upper chamfered surface at the top end of the vertical rod 3 will also squeeze the right end of the horizontal slide bar, and then enter the top slot 23. At this time, the horizontal slide bar moves to the left and stretches the first spring 8, thereby driving the connecting rod 9 to move, and the connecting rod 9 pulls the movable block 10 upward, thereby driving the limit plate 11 to move upward so that the connecting rod 21 is separated from the limit plate 11 (after the movable pin and connecting rod 21 are installed, if the connecting rod 21 and the limit plate 11 are not separated, it will cause wear of the connecting rod 21, so the limit plate 11 only works during installation, and it needs to be retracted after the installation is completed to avoid wear of the connecting rod 21).

[0029] When implementing it specifically, Figure 5As shown, a vertically arranged fixing plate 12 is fixed to the right end of the lower space in the piston 1 for mounting the piston pin 2. The left end surface of the fixing plate 12 is connected to a circular plate 14 via a second spring 13. The circular plate 14 slides left and right in the lower space in the piston 1. The left end of the piston pin 2 and the piston 1 are positioned and fixed by a fixing screw 17. When the piston pin 2 needs to be removed, the fixing screw 17 is removed, and the piston pin 2 is ejected due to the action of the second spring 13, making it easier to remove the piston pin 2.

[0030] In specific implementation, a limiting block 16 is fixed to the outer circumference of the circular plate 14, and a limiting groove 15 is provided in the piston 1 to match the limiting block 16. This structure is used to limit the movement position of the circular plate 14.

[0031] In this specific embodiment, a rotating handle 18 is fixed to the bottom end of the fixing screw 17 to facilitate the disassembly and assembly of the fixing screw 17 .

[0032] In this embodiment, the limit frame 4 is an inverted U-shaped frame, and the top of the inverted U-shaped frame is provided with a sliding hole adapted to slide up and down with the vertical rod 3. The structure of the limit frame 4 is specific and standardized, and the structure is simple and easy to implement.

[0033] In this specific embodiment, the movable block 10 is T-shaped as a whole, has a simple structure, and is easy to implement.

[0034] The above description is only a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions have been made with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents; and such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments, and they should all be covered by the scope of protection of the claims.

Claims

1. A piston mechanism of an automobile engine, comprising a piston (1), a connecting rod (21), a piston pin (2), a cylinder (20), and a crankshaft (22), wherein a piston pin (2) is installed in the piston (1), and a connecting rod (21) is provided on the middle movable sleeve of the outer surface of the piston pin (2), characterized in that: A positioning assembly is provided in the upper space above the piston pin (2) in the piston (1), and the positioning assembly includes a limit frame (4), a vertical rod (3), a horizontal slider (5), a vertical frame (6), a fixed rod (7), and a movable block (10). The limit frame (4) is fixed to the bottom surface of the upper space in the piston (1), the vertical rod (3) is connected to the limit frame (4) by sliding up and down, and a limit portion (19) for limiting the falling position of the vertical rod (3) is provided on the vertical frame (6), the vertical frame (6) is fixed to the top surface of the upper space in the piston (1), the left end of the fixed rod (7) is fixed to the left side of the vertical frame (6), the left end of the horizontal slider (5) is connected to the right side of the vertical frame (6) by sliding left and right, the left end of the horizontal slider (5) is provided with a slide groove, and the right end of the fixed rod (7) is in left and right contact with the slide groove of the horizontal slider. A sliding connection is provided, a first spring (8) is provided between the right side of the slide and the right end face of the fixed rod (7), a top slot (23) is provided in the middle of the horizontal slider (5), an upper chamfered surface is provided on the right side of the top end of the vertical rod (3) for entering the top slot (23) after squeezing the right end of the horizontal slide when the piston pin (2) is installed, and a lower chamfered surface is provided on the left side of the bottom end of the vertical rod (3) for abutting against the piston pin (2), the movable block (10) is connected to the vertical frame (6) by sliding up and down, and the bottom end of the movable block (10) passes through the outside and bottom of the vertical frame (6), a connecting rod (9) is hinged between the movable block (10) and the bottom face of the left end of the horizontal slider (5), and a limit plate (11) for positioning the installation position of the connecting rod (21) is fixed on both front and rear sides of the bottom end of the movable block (10).

2. The automobile engine piston mechanism according to claim 1, characterized in that: A vertically arranged fixing plate (12) is fixed to the right end of the lower space in the piston (1) for installing the piston pin (2). The left end surface of the fixing plate (12) is connected to a circular plate (14) via a second spring (13). The circular plate (14) is connected to the lower space in the piston (1) by sliding left and right. The left end of the piston pin (2) and the piston (1) are positioned and fixed by a fixing screw (17).

3. The automobile engine piston mechanism according to claim 2, characterized in that: A limiting block (16) is fixed to the outer circumferential surface of the circular plate (14), and a limiting groove (15) adapted to the limiting block (16) is provided in the piston (1).

4. The automobile engine piston mechanism according to claim 3, characterized in that: A rotating handle (18) is fixed to the bottom end of the fixed screw (17).

5. The automobile engine piston mechanism according to claim 4, characterized in that: The limiting frame (4) is an inverted U-shaped bracket, and a sliding hole adapted to slide up and down with the vertical rod (3) is provided on the top of the inverted U-shaped bracket.

6. The automobile engine piston mechanism according to claim 5, characterized in that: The movable block (10) is T-shaped as a whole.

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