Special device for preventing marking-off angle error of marine crankshaft shrinkage fit

Abstract

The utility model provides a special device for preventing a marine crankshaft shrinkage fit lineation angle from being mistaken, which belongs to the technical field of marine crankshaft lineation and comprises a lineation template main body, a handle and a hanging hole. The lineation template body is made of a long-strip arc-shaped steel plate and matched with the side face of a crank throw in shape, and scale marks and an anti-skid handle are arranged on the surface of the lineation template body so that an operator can hold and confirm the lineation angle conveniently. The hanging holes are used for conveniently hanging and storing the sample plates; during use, after an operator levels a crank throw, the marking template body is used for marking an angle dividing line, whether the marking angle is correct or not is checked through the handle, and it is ensured that the error is controlled within 1 / 4 degrees. The device is simple in structure, convenient to operate, capable of effectively improving the scribing precision and eliminating potential quality hazards, suitable for the marine crankshaft shrinkage fit scribing procedure and high in practical value.

Description

Technical Field

[0001] This utility model relates to the field of marine crankshaft marking technology, and more specifically, to a special device for preventing errors in the marking angle of marine crankshaft red sleeves. Background Technology

[0002] Red-mount assembly is a process for assembling large, semi-assembled marine crankshafts, offering an economical and reliable connection method. Many large crankshafts that cannot be manufactured using integral casting or forging methods utilize red-mount assembly to connect their components. The current red-mount machining sequence for crankshafts involves first assembling a single crankshaft and main journal into a single unit, then assembling the entire crankshaft section by section from the free end upwards. To ensure the overall crankshaft meets the drawing requirements, the angular error of the cranks in each cylinder of the assembled crankshaft after red-mount assembly must be within 1 / 4 degree.

[0003] In the existing scribing process, the operator needs to place the crankshaft side onto the shims, use a jack to level and align the crankshaft, and then level it according to the three points of the crankshaft neck center, the hot fitting hole center, and the main journal center. After leveling, the operator scribing the center lines on both sides of the crankshaft, the intermediate shaft baseline, and the crankshaft angle graduation lines according to the assembly sequence is done. In the actual scribing process, the operator has no error prevention measures to confirm whether the angle deviation is too large. There is a risk that scribing errors will lead to excessive angle errors, which will not meet the angle error requirements of each cylinder crankshaft in the overall crankshaft drawing, resulting in the risk of crankshaft cutting. Utility Model Content

[0004] To address the aforementioned technical problems, this invention provides a specialized device for preventing errors in the scribing angle of the crankshaft's red sleeve. This invention, through its designed scribing device, effectively assists operators in accurately drawing angle graduation lines during the scribing process, ensuring that the scribing angle error of each cylinder crankshaft's red sleeve is controlled within 1 / 4 degree, meeting the overall crankshaft drawing's processing requirements, thereby avoiding the risk of crankshaft cutting due to scribing errors.

[0005] To achieve the above objectives, this utility model provides a special device for preventing errors in the marking angle of marine crankshaft red sleeves, comprising: a marking template body, a handle, and a hanging hole;

[0006] The main body of the scribing template is made of a long, curved steel plate, with a handle on one side surface, which is used by the operator to confirm whether the scribing angle is correct.

[0007] The handle is fixed to one side surface of the marking template body, making it easy for the operator to hold and operate;

[0008] The hanging holes are provided on the main body of the marking template to facilitate hanging and storing the template.

[0009] Furthermore, the arc shape of the scribing template body matches the side shape of the crankshaft red sleeve of the marine crankshaft, ensuring that the scribing template body can accurately fit the side of the crankshaft.

[0010] Furthermore, the main body of the scribing template is provided with multiple scale marks to assist the operator in accurately scribing angle graduation lines during the scribing process.

[0011] Furthermore, the hanging hole is located at the top of the scribing template body.

[0012] Furthermore, the inner arc of the scribing template body is provided with magnetic material, which is used to adhere to the side of the bend during the scribing process to ensure that the template remains stable during operation.

[0013] Furthermore, the handle is made of non-slip material, and its position is designed in accordance with ergonomics.

[0014] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0015] 1. This utility model provides a special device for preventing errors in the scribing angle of the crankshaft red sleeve. By setting an arc-shaped scribing template body that matches the shape of the crank side and equipped with scale marks, it can effectively assist the operator in making accurate angle division lines during the scribing process, ensuring that the scribing angle error of the red sleeve of each cylinder crank is controlled within 1 / 4 degree, meeting the processing requirements of the overall crankshaft drawing, and avoiding the risk of crankshaft cutting due to scribing errors.

[0016] 2. This utility model provides a special anti-error device for marking angles on marine crankshaft red sleeves. The device is equipped with a non-slip handle and magnetic material, allowing the operator to easily hold and fix the template, reducing slippage and shaking during operation and ensuring the stability of the marking process. The design of the hanging hole facilitates the storage and retrieval of the template, saving operation time and significantly improving work efficiency.

[0017] 3. This utility model provides a special device for preventing errors in the scribing angle of marine crankshaft red sleeves. The device has a reasonable structural design and is made of high-strength stainless steel, which ensures the durability of the device and the accuracy stability of long-term use. The device has low manufacturing cost, is easy to maintain and promote, and is suitable for various marine crankshaft red sleeve scribing processes, and has high practical value.

[0018] Based on the above reasons, this utility model can be widely promoted in the field of marine crankshaft marking technology. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a special device for preventing errors in the marking angle of a marine crankshaft red sleeve, as described in this utility model.

[0021] Figure 2 This is an application diagram of a special device for preventing errors in the marking angle of a marine crankshaft red sleeve, as described in this utility model.

[0022] In the diagram: 1. The main body of the scribed template; 2. The handle; 3. The hanging hole. Detailed Implementation

[0023] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0027] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0028] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0029] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0030] like Figures 1 to 2 As shown, this utility model discloses a special device for preventing errors in the marking angle of a marine crankshaft red sleeve, comprising: a marking template body 1, a handle 2, and a hanging hole 3;

[0031] The main body 1 of the scribing template is made of a long arc-shaped steel plate, and a handle 2 is provided on one side surface, which is used by the operator to confirm whether the scribing angle is correct.

[0032] The handle 2 is fixed to one side surface of the marking template body 1, making it easy for the operator to hold and operate;

[0033] The hanging hole 3 is provided on the main body 1 of the marking template to facilitate hanging and storing the template.

[0034] Furthermore, in practical applications, the operator places the side of the crank on the leveling shim, uses jacks to support the crank neck and the bottom of the intermediate shaft respectively, and ensures that the crank is in a horizontal state by pressing the three points: the center of the crank neck, the center of the hot fitting hole, and the center of the main journal. After leveling, the operator marks the center lines on both sides of the crank and the reference line of the intermediate shaft.

[0035] The main body 1 of the scribing template is attached to the side of the crank, and the crank angle division line is drawn according to the assembly sequence. Concentric circles of the hot fitting holes are drawn on the large surface of the crank. The operator holds the main body 1 of the scribing template with the handle 2 to check whether the division line is correct and ensure that the angle error is within 1 / 4 degree. After use, the main body 1 of the scribing template is hung up and stored through the hanging hole 3.

[0036] Furthermore, the arc shape of the scribing template body 1 matches the side shape of the crankshaft red sleeve of the ship, ensuring that the scribing template body 1 can accurately fit the side of the crankshaft.

[0037] Furthermore, the main body 1 of the scribing template is provided with multiple scale marks to assist the operator in accurately scribing angle division lines during the scribing process.

[0038] Furthermore, the hanging hole 3 is located at the top of the scribing template body 1.

[0039] Furthermore, the inner arc of the scribing template body 1 is provided with magnetic material, which is used to adhere to the side of the bend during the scribing process to ensure that the template remains stable during operation.

[0040] Furthermore, the handle 2 is made of non-slip material, and the position of the handle 2 is designed in accordance with ergonomics.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A special device for preventing errors in the marking angle of a marine crankshaft red sleeve, characterized in that, include: The main body of the marking template, handles, and hanging holes; The main body of the scribing template is made of a long, curved steel plate, with a handle on one side surface, which is used by the operator to confirm whether the scribing angle is correct. The handle is fixed to one side surface of the marking template body, making it easy for the operator to hold and operate; The hanging holes are provided on the main body of the marking template to facilitate hanging and storing the template.

2. The special device for preventing errors in the marking angle of a marine crankshaft red sleeve according to claim 1, characterized in that, The arc shape of the scribing template body matches the side shape of the crankshaft red sleeve of the ship, ensuring that the scribing template body can accurately fit the side of the crankshaft.

3. The special device for preventing errors in the marking angle of a marine crankshaft red sleeve according to claim 1, characterized in that, The main body of the scribing template is equipped with multiple scale marks to assist the operator in accurately drawing angle graduation lines during the scribing process.

4. A special device for preventing errors in the marking angle of a marine crankshaft red sleeve according to claim 1, characterized in that, The hanging hole is located at the top of the marking template body.

5. A special device for preventing errors in the marking angle of a marine crankshaft red sleeve according to claim 1, characterized in that, The inner arc of the scribing template body is provided with magnetic material, which is used to adhere to the side of the bend during the scribing process to ensure that the template remains stable during operation.

6. A special device for preventing errors in the marking angle of a marine crankshaft red sleeve according to claim 1, characterized in that, The handle is made of non-slip material and its position is designed in accordance with ergonomics.

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