A piston lifting tool

Abstract

This utility model relates to a piston lifting tool, comprising: a lifting head, which is split into two halves by stretching to fill and fix a piston; a lifting plate fixing one half of the lifting head is installed at one end of the lifting head; a vertically penetrating lifting rod is threaded onto the lifting plate; one end of the lifting rod is tapered and supports the lifting head to stretch and separate by vertical movement; one end of the lifting rod is toothed and engages with a handle for multi-angle positioning; a return spring for support and fixation is installed between the lifting rod and the handle; the return spring guides the handle to engage with the lifting rod for multi-angle positioning by compression. This utility model, through the handle engaging with the lifting rod and the return spring, compresses the handle to guide its rotational movement and engagement with the lifting rod, thus achieving multi-angle positioning of the handle. When readjusting the handle's angle, there is no need to reinstall the lifting tool to adjust the overall angle, making the process simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of piston disassembly technology, specifically to a piston lifting tool. Background Technology

[0002] The piston in an automobile engine is a key component that reciprocates within the cylinder. Its basic structure can be divided into three parts: the top, the head, and the skirt. The piston top, together with the cylinder head and cylinder wall, forms the combustion chamber, which withstands the high-temperature and high-pressure gases generated by combustion and transmits the gas pressure to the crankshaft through the connecting rod, converting it into mechanical energy to drive the vehicle. To adapt to harsh working environments, modern pistons are mostly made of aluminum alloy, which has the characteristics of being lightweight and having good thermal conductivity. Some diesel engine pistons use cast iron or heat-resistant steel. The piston achieves continuous engine operation through the cyclical motion of four strokes: intake, compression, power, and exhaust.

[0003] The specialized tool used to remove the piston connecting rod from the engine cylinder liner is called a piston lifting tool. The lifting tool mainly consists of a head and a pull rod. The head is triangular and extends into the combustion chamber of the cylinder to form a fixed position. The pull rod is used by the operator to control the lifting with both hands, allowing the piston connecting rod to be removed from the engine cylinder liner. In the use of existing technology, the inventors found that the pull rod of the lifting tool is generally a ring-shaped or T-shaped pull rod, and in most cases requires two-handed operation. After the lifting tool fills the piston's combustion chamber and fixes it, the pull rod of the lifting tool faces a fixed direction. Because the engine cylinder liner is cuboid, the distance between the operator and the piston connecting rod and the lifting tool varies depending on the position on the side. If the distance between the pull rod and the operator is too far, and it is inconvenient for the operator to pull with both hands, the lifting tool needs to be reinstalled and the angle of the pull rod adjusted, a cumbersome and inconvenient process. Utility Model Content

[0004] Based on the above description, this utility model provides a piston lifting tool to solve the problem that when the existing lifting tool is connected and fixed to the combustion chamber of the cylinder, if the distance between the pull rod and the operator is far and it is inconvenient for the operator to pull with both hands, the lifting tool needs to be reinstalled and the angle of the pull rod adjusted.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A piston lifting tool, comprising: a lifting head, wherein the lifting head is divided into two halves by stretching to fill and fix a piston, a lifting plate fixing one half is installed at one end of the lifting head, the lifting plate is threadedly connected to a vertically penetrating lifting rod, one end of the lifting rod is tapered and supports the lifting head to stretch and separate by vertical movement, one end of the lifting rod is toothed, the inside of the lifting rod engages with a handle for multi-angle positioning, a return spring for support and fixation is installed between the lifting rod and the handle, the return spring guides the handle to engage with the lifting rod for multi-angle positioning by compression.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, a threaded hole is provided in the center of the surface of the lifting plate, and a rivet is fixedly connected to the surface of the lifting plate. The rivet passes through the lifting plate and is located outside the threaded hole.

[0008] Furthermore, the lifting rod includes a threaded rod, an inner cavity, a movable hole, and a toothed block. One end of the threaded rod is threaded to the inside of the threaded hole. The end of the threaded rod near the lifting plate is tapered. The inner cavity is cylindrical and is located inside the threaded rod at the end away from the lifting plate.

[0009] Furthermore, the movable hole is located at the center of the inner wall of the inner cavity at the end away from the lifting plate. The inner cavity, the movable hole, and the axis of the threaded rod coincide with each other. The toothed blocks are integrally formed at the edge of the inner wall of the inner cavity at the end away from the lifting plate. The toothed blocks are distributed in a ring at equal intervals with the axis of the threaded rod as the center.

[0010] Furthermore, the grip is T-shaped, with one end inserted into the inside of the movable hole, and the other two ends of the grip perpendicular to the threaded rod.

[0011] Furthermore, a slider is fixedly connected to one end of the grip near the lifting plate. The slider is slidably connected to the inner side of the inner cavity and fits against the end of the inner cavity away from the lifting plate. The outer side of the slider has toothed grooves that are distributed in a ring and mesh with the toothed block.

[0012] Furthermore, the reset spring is inserted into the inner side of the inner cavity, with one end of the reset spring near the lifting plate fixedly connected to the inner wall of the inner cavity near the lifting plate, and the other end of the reset spring abutting against the end of the slider near the lifting plate.

[0013] Furthermore, the lifting head includes a female head, a female head, a socket, a pin, and a tapered groove. The tapered groove is formed in the center of the female head and the female head on the side closest to each other, and both are in contact with the tapered end of the threaded rod. The two tapered grooves are symmetrically distributed with the center of the threaded rod as the origin. The female head is fixedly connected to the extension end of the rivet.

[0014] Furthermore, the insertion hole is opened on the side where the female head and the female head are close to each other. The insertion hole of the female head and the insertion hole of the female head are both located on both sides of the edge of the tapered groove. The axes of two adjacent insertion holes coincide. One end of the pin is fixedly connected to the inside of the insertion hole of the female head, and the other end of the pin is slidably connected to the inside of the insertion hole of the female head.

[0015] Furthermore, the female head has two wavy arc-shaped protrusions on the side away from the female head, and the side of the female head away from the female head is arc-shaped. The female head and the female head are equal in size and parallel to each other on the side closest to each other.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. This utility model uses a handle that engages with the lifting rod, along with a return spring. The compression of the return spring guides the handle to rotate and engage with the lifting rod, enabling the handle to be positioned at multiple angles. When readjusting the handle's angle, there is no need to reinstall the lifting tool to adjust the overall angle. The process is simple and convenient. The lifting tool can be used by workers to pull the piston with one or both hands at different positions inside the engine cylinder liner, greatly improving the efficiency and convenience of removing the piston connecting rod from the engine cylinder liner.

[0017] 2. This utility model uses a spliced ​​and combined male and female heads. The two sides of the male and female heads, which are far apart from each other, have two continuous arc-shaped protrusions, one arc-shaped and the other wavy. When connecting to the multi-spherical combustion chamber of the piston, the male and female heads have higher compatibility and can achieve better fixing effect. At the same time, when connecting and fixing to piston combustion chambers of other shapes, the arc shape on the outer side of the male and female heads forms three contact points, which can still be stretched in a triangular shape and fit against the inner wall of the combustion chamber for lifting. Compared with the traditional triangular lifting head, the male and female heads have a wider range of applicability. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a piston lifting tool provided in an embodiment of this utility model; Figure 2 This is an exploded view of the lifting head and lifting rod in an embodiment of this utility model; Figure 3 for Figure 2 Another structural diagram from a different perspective; Figure 4This is an exploded view of the lifting rod and handle in an embodiment of the present utility model; The attached diagram lists the components represented by each number as follows: 1. Lifting head; 11. Female head; 12. Female head; 13. Insertion hole; 14. Pin; 15. Tapered groove; 2. Lifting plate; 21. Threaded hole; 22. Rivet; 3. Lifting rod; 31. Threaded rod; 32. Inner chamber; 33. Movable hole; 34. Tooth block; 4. Handle; 41. Slider; 42. Tooth groove; 5. Return spring. Detailed Implementation

[0019] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0021] Please see Figure 1-4 This utility model discloses a piston lifting tool, comprising: a lifting head 1, which is divided into two halves by stretching to fill and fix a piston; a lifting plate 2 is installed at one end of the lifting head 1 to fix one half; a vertically penetrating lifting rod 3 is threadedly connected to the lifting plate 2; one end of the lifting rod 3 is tapered and supports the lifting head 1 to stretch and separate by vertical movement; one end of the lifting rod 3 is toothed; a handle 4 for multi-angle positioning is engaged inside the lifting rod 3; a return spring 5 for support and fixation is installed between the lifting rod 3 and the handle 4; the return spring 5 guides the handle 4 to engage with the lifting rod 3 for multi-angle positioning by compression.

[0022] Please see Figure 2 A threaded hole 21 is provided in the center of the surface of the lifting plate 2. A rivet 22 is fixedly connected to the surface of the lifting plate 2. The rivet 22 passes through the lifting plate 2 and is located outside the threaded hole 21. The lifting rod 3 is vertically installed by being threadedly connected to the lifting rod 3 through the threaded hole 21. The rivet 22 is used to fix the lifting head 1, ensuring that the connection between the lifting head 1 and the lifting plate 2 is stable and preventing loosening or falling off during the lifting process, thereby improving the overall stability and reliability of the tool.

[0023] Please see Figure 4The lifting rod 3 includes a threaded rod 31, an inner cavity 32, a movable hole 33, and a toothed block 34. One end of the threaded rod 31 is threaded to the inside of the threaded hole 21. The end of the threaded rod 31 near the lifting plate 2 is tapered. The inner cavity 32 is cylindrical and is located inside the threaded rod 31 at the end away from the lifting plate 2. The lifting rod 3 can achieve a stable connection with the lifting plate 2 through the threaded connection. The configuration of the inner cavity 32, the movable hole 33, and the toothed block 34 provides a basis for the multi-angle positioning of the grip 4, improving the flexibility and adaptability of the tool.

[0024] Please see Figure 4 The movable hole 33 is located at the center of the inner wall of the inner chamber 32, away from the lifting plate 2. The axes of the inner chamber 32, the movable hole 33, and the threaded rod 31 coincide. The toothed block 34 is integrally formed at the edge of the inner wall of the inner chamber 32, away from the lifting plate 2. The toothed blocks 34 are distributed in a ring at equal intervals with the axis of the threaded rod 31 as the center. The coincidence of the axes of the inner chamber 32, the movable hole 33, and the threaded rod 31 ensures that the handle 4 slides smoothly in the movable hole 33. The ring-shaped distribution of the toothed blocks 34 allows the handle 4 to achieve multi-angle meshing and positioning with the toothed blocks 34, thereby meeting the needs of the operator to apply force and pull in different positions, and improving the practicality and convenience of the tool.

[0025] Please see Figure 4 The handle 4 is T-shaped, with one end inserted into the inner side of the movable hole 33, and the other two ends of the handle 4 perpendicular to the threaded rod 31. A slider 41 is fixedly connected to the end of the handle 4 near the lifting plate 2. The slider 41 is slidably connected to the inner side of the inner cavity 32 and fits against the end of the inner cavity 32 away from the lifting plate 2. The outer side of the slider 41 has a ring-shaped groove 42 that meshes with the toothed block 34. The handle 4 can be easily inserted into the movable hole 33. At the same time, the T-shaped structure increases the contact area between the handle 4 and the operator's hand, improving the comfort and stability of the grip, making it easier for the operator to perform the lifting operation. The handle 4 can slide in the inner cavity 32 through the slider 41. At the same time, the meshing of the groove 42 and the toothed block 34 realizes the multi-angle positioning of the handle 4, thereby meeting the needs of the operator to apply force and pull in different positions, improving the flexibility and adaptability of the tool.

[0026] Please see Figure 4The return spring 5 is inserted into the inner side of the inner cavity 32. One end of the return spring 5 near the lifting plate 2 is fixedly connected to the inner wall of the inner cavity 32 near the lifting plate 2. The other end of the return spring 5 is attached to the end of the slider 41 near the lifting plate 2. The return spring 5 can guide the handle 4 to engage with the lifting rod 3 for multi-angle positioning by compression. When it is necessary to adjust the angle of the handle 4, simply press the handle 4 gently to separate the handle 4 from the toothed block 34. At this time, the handle 4 can rotate flexibly. When the appropriate angle is adjusted, release the handle 4, and the handle 4 will re-engage with the toothed block 34 through the toothed groove 42 to achieve angle adjustment. The operation is simple and convenient, improving the practicality and convenience of the tool.

[0027] Please see Figure 2 The lifting head 1 includes a female head 11, a female head 12, a socket 13, a pin 14, and a tapered groove 15. The tapered groove 15 is located at the center of the side where the female head 11 and the female head 12 are close to each other, and both are in contact with the tapered end of the threaded rod 31. The two tapered grooves 15 are symmetrically distributed with the center of the threaded rod 31 as the origin. The female head 11 is fixedly connected to the extension end of the rivet 22. The socket 13 is located on the side where the female head 11 and the female head 12 are close to each other. The sockets 13 of the female head 11 and the female head 12 are located on both sides of the edge of the tapered groove 15, and the axes of two adjacent sockets 13 coincide. One end of the pin 14 is fixedly connected to the socket 13 of the female head 11. On the other side, the other end of the pin 14 is slidably connected to the inside of the insertion hole 13 of the female head 12. The larger end of the tapered groove 15 of the female head 11 and the female head 12 is in contact with the tapered end of the threaded rod 31. The smaller end of the tapered groove 15 of the female head 11 and the female head 12 allows the tapered end of the threaded rod 31 to continue to penetrate. The tapered end of the threaded rod 31 pushes the female head 12 and the female head 11 to stretch. Since the female head 11 is fixed to the rivet 22, when the tapered end of the threaded rod 31 continues to penetrate, the female head 12 will pass through the tapered groove 15 and be pushed by the tapered end of the threaded rod 31 to push the pin 14 outward horizontally. The female head 12 and the female head 11 can be fixed in piston combustion chambers of different sizes.

[0028] Please see Figure 2 The female head 11 has two wavy arc-shaped protrusions on the side away from the male head 12, and the male head 12 has an arc shape on the side away from the female head 11. The female head 11 and the male head 12 are equal in size and parallel to each other on the side closer to each other. The male head 12 and the female head 11 have two continuous arc-shaped protrusions on the side away from each other, one arc-shaped and the other wavy. When connecting to the multi-spherical combustion chamber of the piston, the male head 12 and the female head 11 have similar shapes to the multi-spherical combustion chamber, which has higher adaptability and can achieve better fixing effect. At the same time, when connecting and fixing to piston combustion chambers of other shapes, the arc shape on the outer side of the male head 12 and the female head 11 forms three contact points, which can still be stretched in a triangular shape and attached to the inner wall of the combustion chamber for lifting.

[0029] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A piston lifting tool, characterized in that, include: A lifting head (1) is divided into two halves by stretching to fill and fix the piston. One end of the lifting head (1) is fitted with a lifting plate (2) that fixes one half. The lifting plate (2) is threaded with a vertically penetrating lifting rod (3). One end of the lifting rod (3) is tapered and supports the lifting head (1) to stretch and separate by vertical movement. One end of the lifting rod (3) is toothed. The inside of the lifting rod (3) is engaged with a handle (4) for multi-angle positioning. A return spring (5) for support and fixation is installed between the lifting rod (3) and the handle (4). The return spring (5) guides the handle (4) to engage with the lifting rod (3) for multi-angle positioning by compression.

2. The piston lifting tool according to claim 1, characterized in that: A threaded hole (21) is provided in the center of the surface of the lifting plate (2), and a rivet (22) is fixedly connected to the surface of the lifting plate (2). The rivet (22) passes through the lifting plate (2) and is located outside the threaded hole (21).

3. The piston lifting tool according to claim 2, characterized in that: The lifting rod (3) includes a threaded rod (31), an inner cavity (32), a movable hole (33), and a toothed block (34). One end of the threaded rod (31) is threaded to the inside of the threaded hole (21). The end of the threaded rod (31) near the lifting plate (2) is tapered. The inner cavity (32) is cylindrical and is located inside the threaded rod (31) at the end away from the lifting plate (2).

4. The piston lifting tool according to claim 3, characterized in that: The movable hole (33) is located at the center of the inner wall of the inner cavity (32) away from the lifting plate (2). The axes of the inner cavity (32), the movable hole (33) and the threaded rod (31) coincide with each other. The toothed block (34) is integrally formed at the edge of the inner wall of the inner cavity (32) away from the lifting plate (2). The toothed block (34) is distributed in a ring at equal intervals with the axis of the threaded rod (31) as the center.

5. The piston lifting tool according to claim 3, characterized in that: The grip (4) is T-shaped, with one end of the grip (4) inserted into the inside of the movable hole (33), and the other two ends of the grip (4) perpendicular to the threaded rod (31).

6. The piston lifting tool according to claim 5, characterized in that: The handle (4) is fixedly connected to a slider (41) at one end near the lifting plate (2). The slider (41) is slidably connected to the inner side of the inner cavity (32) and fits against the end of the inner cavity (32) away from the lifting plate (2). The outer side of the slider (41) is provided with toothed grooves (42) that are distributed in a ring and mesh with the toothed block (34).

7. The piston lifting tool according to claim 6, characterized in that: The reset spring (5) is inserted into the inner side of the inner cavity (32). One end of the reset spring (5) near the lifting plate (2) is fixedly connected to the inner wall of the inner cavity (32) near the lifting plate (2). The other end of the reset spring (5) is attached to the end of the slider (41) near the lifting plate (2).

8. The piston lifting tool according to claim 6, characterized in that: The lifting head (1) includes a female head (11), a female head (12), a socket (13), a pin (14), and a tapered groove (15). The tapered groove (15) is opened in the center of the female head (11) and the female head (12) on the side close to each other, and both are in contact with the tapered end of the threaded rod (31). The two tapered grooves (15) are symmetrically distributed with the center of the threaded rod (31) as the origin. The female head (11) is fixedly connected to the extension end of the rivet (22).

9. The piston lifting tool according to claim 8, characterized in that: The insertion hole (13) is located on the side of the female head (11) and the female head (12) that are close to each other. The insertion hole (13) of the female head (11) and the insertion hole (13) of the female head (12) are both located on both sides of the edge of the tapered groove (15). The axes of two adjacent insertion holes (13) coincide. One end of the pin (14) is fixedly connected to the inside of the insertion hole (13) of the female head (11), and the other end of the pin (14) is slidably connected to the inside of the insertion hole (13) of the female head (12).

10. The piston lifting tool according to claim 8, characterized in that: The female head (11) has two wavy arc-shaped protrusions on the side away from the female head (12). The side of the female head (12) away from the female head (11) is arc-shaped. The female head (11) and the female head (12) are equal in size and parallel to each other on the side closest to each other.

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