A guide tool for piston seating

Abstract

The utility model belongs to the engine manufacturing technical field discloses a kind of guiding tool for piston seating.Including cylinder, cylinder top and spanner transmission connection, cylinder bottom and cross head detachable cooperation, cylinder diameter is less than the diameter of piston rod upper through-hole, and piston rod sleeve is connected in the outside of cylinder;Solve the problem of inaccurate docking in the process of piston seating under prior art, solve the problem of inaccurate docking in the process of piston seating under prior art.

Description

Technical Field

[0001] This utility model relates to the field of engine manufacturing technology, and in particular to a guide tool for piston seating. Background Technology

[0002] During the ship's main engine manufacturing and assembly stage, the piston is fixed in the cylinder body. Subsequently, the cylinder body is closed with the frame, and the crosshead is moved upward by turning the engine. After contacting the lower part of the piston rod, the piston mounting feet are removed, and the piston and crosshead are moved downward together by turning the engine. After reaching the appropriate position, the piston is fixed with hydraulic bolts and nuts, connecting the piston rod and crosshead. When installing hydraulic bolts, if the piston rod is not in the correct position, the bolts will be difficult to insert, resulting in inaccurate installation and mating positions. The hydraulic bolts will be subjected to additional stress, which will shorten the bolt life and increase the installation difficulty. Utility Model Content

[0003] The purpose of this invention is to provide a guide tool for piston seating, solving the problem of inaccurate alignment during piston seating in the prior art.

[0004] To achieve this objective, the present invention adopts the following technical solution: The present invention provides a guide tool for piston seating, comprising a column, the top of which is connected to a wrench for transmission, the bottom of which is detachably engaged with a crosshead, the diameter of which is smaller than the diameter of the through hole on the piston rod, and the piston rod being sleeved on the outside of the column.

[0005] Preferably, a hexagonal groove is formed at the top of the column, and a hexagonal plug is formed on the wrench, the plug being inserted into the groove.

[0006] Preferably, a first movable head is inserted into the top of the column, and the groove is formed on the first movable head.

[0007] Preferably, the bottom of the column is threaded, and the thread is screwed into the crosshead.

[0008] Preferably, a second movable head is inserted into the bottom of the column, and the second movable head is provided with the thread.

[0009] Preferably, the column is inserted from one end of the piston rod to one end of the crosshead, and the diameter of the column gradually increases.

[0010] Preferably, the hardness of the column is lower than that of the piston rod, and the hardness of the column is also lower than that of the crosshead.

[0011] Preferably, the column and the through hole correspond one-to-one.

[0012] Preferably, the two ends of the column are chamfered.

[0013] Preferably, the column is magnetic.

[0014] Beneficial effects: During the docking process between the piston rod and the crosshead, the column is first screwed onto the crosshead, and then the through hole on the piston rod is fitted onto the column. The position of the piston rod is adjusted by the column, so that the piston rod can be aligned with the position where the column is connected to the crosshead. During the subsequent installation of hydraulic bolts, the piston rod and the crosshead can be kept in the correct installation position, reducing the probability of misalignment. Attached Figure Description

[0015] Figure 1 This is a drawing of the piston rod main body of this utility model;

[0016] Figure 2 This is a schematic diagram of the piston rod installation of this utility model.

[0017] In the diagram: 1. Column; 11. First movable head; 12. Second movable head; 2. Crosshead; 3. Piston rod. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0019] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0022] In the current technology, deviations may occur during the contact and docking process between the piston rod and the crosshead. This will cause stress on the hydraulic bolt in the middle during the connection between the piston rod and the crosshead, shortening the life of the hydraulic bolt and causing high stress on the hydraulic bolt when it comes into contact with the parts on both sides.

[0023] To solve the above problems, such as Figures 1 to 2 As shown, this utility model provides a guide tool for piston seating, including a column 1, the top of the column 1 being connected to a wrench for transmission, the bottom of the column 1 being detachably engaged with a crosshead 2, the diameter of the column 1 being smaller than the diameter of the through hole on the piston rod 3, and the piston rod 3 being sleeved on the outside of the column 1.

[0024] Before connecting the piston rod 3 and the crosshead 2, first fix the column 1 onto the crosshead 2, and then install the piston rod 3 onto the crosshead 2. During the installation process, the through hole on the piston rod 3 is fitted onto the outside of the column 1. The position of the piston rod 3 is adjusted by the column 1 so that the piston rod 3 can be aligned with the crosshead 2 according to the design requirements. Then, use a wrench to remove the column 1. After removal, screw the hydraulic bolt into the through hole so that the hydraulic bolt can be installed in place. At the same time, the column 1 is used to eliminate the alignment error between the crosshead 2 and the piston rod 3.

[0025] The top of the column 1 has a hexagonal groove, and the wrench has a hexagonal plug that is inserted into the groove. After the piston rod 3 and the crosshead 2 are in contact, the column 1 needs to be removed from the through hole. In order to enable the wrench to rotate the column 1 during the connection process through the hexagonal fit, the column 1 and the crosshead 2 can be separated, making it easier for the operator to disassemble later.

[0026] A first movable head 11 is inserted into the top of the column 1. A groove is formed on the first movable head 11. The groove is set on the first movable head 11. The column 1 of this utility model can be replaced with different types of grooves. The selected groove is inserted into the top of the column 1, so that the guide tool can be flexibly matched with different types of grooves, making the installation of the guide tool more convenient.

[0027] The bottom of the column 1 is threaded and screwed into the crosshead 2. By providing threads at the bottom of the column 1, the column 1 can be screwed onto the crosshead 2 and can be easily rotated with a wrench, reducing the difficulty of disassembling and assembling the column 1.

[0028] The bottom of the column 1 of this utility model is inserted with a second movable head 12. The second movable head 12 is provided with threads, and the second movable head 12 is easy to disassemble. Different second movable heads 12 are provided with different threads, so that the column 1 can be screwed with cross heads 2 of different types of threads, making the guide tool more adaptable to a wider range of scenarios.

[0029] The column 1 is inserted from one end of the piston rod 3 to one end of the crosshead 2. The diameter of the column 1 gradually increases, while the diameter of the top of the column 1 is smaller, which facilitates the insertion of the through hole at the bottom of the piston rod 3. After that, the diameter of the column 1 gradually increases, which can correct the position of the piston rod 3, thereby making the piston rod 3 and the crosshead 2 fit more accurately.

[0030] The hardness of the cylinder 1 is lower than that of the piston rod 3, and the hardness of the cylinder 1 is also lower than that of the crosshead 2. This can prevent the cylinder 1 from leaving scratches on the piston rod 3 and the crosshead 2, and can protect the piston rod 3 and the crosshead 2.

[0031] Each column 1 corresponds to a through hole. Typically, four sets of through holes are provided on the piston rod 3, and four sets of columns 1 are screwed onto the crosshead 2. During the docking process of the piston rod 3, the four sets of columns 1 can be inserted into the piston rod 3 at the same time to achieve the pre-positioning of the piston rod 3.

[0032] The two ends of the column 1 are chamfered to prevent scratches to workers and to prevent scratches to the piston rod 3 and crosshead 2.

[0033] The column 1 is magnetic. When connected to the wrench, the column 1 can be attracted to the wrench, making it easy for the operator to remove the column 1 from the through hole and reducing the difficulty of disassembly.

[0034] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A guide tool for piston seating, characterized in that, Includes a column (1), the top of which is connected to a wrench, the bottom of which is detachably engaged with a crosshead (2), the diameter of which is smaller than the diameter of the through hole on the piston rod (3), and the piston rod (3) is sleeved on the outside of the column (1).

2. The guide tool for piston seating according to claim 1, characterized in that, The top of the column (1) has a hexagonal groove, and the wrench has a hexagonal plug that is inserted into the groove.

3. The guide tool for piston seating according to claim 2, characterized in that, The top of the column (1) is fitted with a first movable head (11), and the groove is formed on the first movable head (11).

4. The guide tool for piston seating according to claim 1, characterized in that, The bottom of the column (1) is threaded, and the thread is screwed into the crosshead (2).

5. The guide tool for piston seating according to claim 4, characterized in that, The bottom of the column (1) is connected to a second movable head (12), and the second movable head (12) is provided with the thread.

6. The guide tool for piston seating according to claim 1, characterized in that, The column (1) is inserted from one end of the piston rod (3) to one end of the crosshead (2), and the diameter of the column (1) gradually increases.

7. The guide tool for piston seating according to claim 1, characterized in that, The hardness of the column (1) is lower than that of the piston rod (3), and the hardness of the column (1) is also lower than that of the crosshead (2).

8. The guide tool for piston seating according to claim 1, characterized in that, The column (1) corresponds one-to-one with the through hole.

9. The guide tool for piston seating according to claim 1, characterized in that, The two ends of the column (1) are chamfered.

10. The guide tool for piston seating according to claim 1, characterized in that, The column (1) is magnetic.

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