Marine engine deep hole measuring tool
By designing a deep hole measuring tool for marine engines with positioning blocks and reading scales, the problem of insufficient measurement accuracy in existing technologies has been solved, and accurate measurement of deep holes in marine engine cylinder liners has been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2026-03-31
AI Technical Summary
Existing measuring tools have low measurement accuracy and cannot accurately measure the depth of cooling water holes in marine engine cylinder liners, especially when there is a deep hole step structure at the hole opening, resulting in inaccurate measurement values.
A deep hole measuring tool for marine engines was designed, including a positioning block for positioning reference and a reading scale. The positioning block is equipped with a reading window, and the measuring end has an arc structure that can make centered contact with the bottom of the deep hole. It is matched at the entrance by a positioning step and combined with a clamping mechanism to achieve precise positioning.
It enables precise measurement of deep holes in marine engines, ensuring that the measuring end is coaxial with the deep hole and obtaining accurate hole depth data.
Smart Images
Figure CN224066041U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of marine engine manufacturing and testing, and in particular to a deep hole measuring tool for marine engines. Background Technology
[0002] Figure 1 The partial structure of the marine diesel engine cylinder liner 10 is shown. After the cooling water hole 11 is machined, it needs to be checked for dimensions using measuring tools. The existing measuring tools have low measurement accuracy and cannot meet the requirements for measurement depth. Specifically, the cooling water hole is deep and needs to be measured coaxially and centered, otherwise the measurement value will be inaccurate. In addition, some water holes are inclined, and a deep hole step structure 12a is arranged at its inlet 12, which further increases the measurement difficulty. Utility Model Content
[0003] In order to overcome the above-mentioned defects of the prior art, the purpose of this utility model is to provide a deep hole measuring tool for marine engines to achieve the purpose of measuring the deep hole of the cylinder liner.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] A deep hole measuring tool for marine engines includes a positioning block that serves as a positioning reference and is fitted onto a measuring rod. A reading scale is arranged on the measuring rod, and a reading window that slides between the reading scales is provided on the positioning block. The positioning end is located on the side of the positioning block, and the positioning end is on the same side as the measuring end of the measuring rod.
[0006] In a preferred embodiment of this utility model, a positioning step is provided on the positioning end, and the outer diameter of the positioning step matches the inner diameter of the deep hole step at the deep hole inlet, so that the positioning end can be tightly embedded in the deep hole step.
[0007] In a preferred embodiment of this utility model, the measuring end is an arc structure, and the arc of the arc structure is smaller than the arc of the bottom of the deep hole, so that the measuring end is centered and coaxial when it contacts the bottom.
[0008] In a preferred embodiment of this utility model, a wear-resistant layer is further provided on the measuring end.
[0009] In a preferred embodiment of this utility model, the positioning block is provided with a clamping mechanism for fixing the measuring rod.
[0010] In a preferred embodiment of this utility model, the end of the reading ruler is provided with a protrusion, and the measuring rod is at the zero position when the positioning block contacts the protrusion.
[0011] The beneficial effects of this utility model are as follows:
[0012] The marine engine deep hole measuring tool provided by this utility model designs the positioning slider of the deep hole vernier measuring ruler to match the deep hole step and designs the measuring end to be an arc structure, so that the measuring ruler can be centered at both the entrance and the bottom, thereby obtaining accurate measurement data. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0014] Figure 1 It is a half-section view of the engine cylinder liner.
[0015] Figure 2 yes Figure 1 A magnified view of a portion of the image.
[0016] Figure 3 This is an overall schematic diagram of the present invention. Figure 1 .
[0017] Figure 4 This is an overall schematic diagram of the present invention. Figure 2 .
[0018] Figure 5 This is a partially enlarged view of the measuring end of this utility model.
[0019] Figure 6 This is a partial enlarged view of the end of the reading ruler of this utility model.
[0020] Figure 7 This is a schematic diagram illustrating the use of this utility model. Detailed Implementation
[0021] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. The above description is for the purpose of simplifying the description of this utility model and does 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, it should not be construed as a limitation of this utility model.
[0022] Unless otherwise specified, the singular forms “a,” “the,” and “the” used in this specification include the plural forms. The terms “comprising,” “including,” and “containing” used in this specification indicate the presence of the claimed feature but do not exclude the presence of one or more other features. The term “and / or” used in this specification includes any and all combinations of one or more of the relevant listed items.
[0023] When a component is described in the specification as being "on", "fixed" to, "connected" to, or "joined" to another component, the component may be directly located on, fixed to, connected to, joined to, or in contact with the other component, or there may be an intermediate component present.
[0024] Exemplary embodiments of this application will now be described with reference to the accompanying drawings. However, it should be understood that this application can be presented in many different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments. Throughout the drawings, the same reference numerals denote the same or functionally identical elements.
[0025] refer to Figures 3 to 6 This deep-hole measuring tool for marine engines is shown, mainly comprising a measuring rod 20 for insertion into a deep hole 13 and a slidable positioning block 21 fitted onto the measuring rod 20. The measuring rod 20 is equipped with a graduated reading scale 22, and the insertion depth of the measuring rod 20 from the positioning block 21 is determined by the relative movement between the measuring rod 20 and the positioning block 21.
[0026] Considering the special structure of the cooling water hole 11 of the cylinder liner 10, with a deep-hole stepped structure 12a at its inlet 12 and a circular arc structure at the bottom 13a of the deep hole 13, special measuring tools are required to accurately measure its hole depth. Specifically, the side of the positioning block 21 facing the measuring end 23 is the positioning end 21c. The initial positioning of the cooling water hole 11 inlet 12 is achieved by inserting the positioning end 21c into the deep-hole stepped structure 12a. For this purpose, the measuring end 23 is also arranged with a corresponding positioning stepped structure 21d, so that it can match the deep-hole stepped structure 12a, allowing the measuring rod 20 to be centered and fixed. A reading window 21b is provided on the positioning block 21. The distance difference between the measuring end 23 and the positioning end 21c is accurately obtained by matching the reading window 21b with the scale on the reading ruler 22. A tightening screw 21a is provided on the side of the positioning block 21 to adjust the sliding damping between the positioning block 21 and the measuring rod 20. The end of the reading scale 22 is provided with a limiting protrusion 22a for the sliding stroke of the positioning block 21. It can be understood that when the positioning block 21 contacts the protrusion 22a, the measuring rod 20 is in the zero position.
[0027] Reference Figure 7 During measurement, the positioning block 21 is accurately positioned with the deep hole step 12a, and the measuring end 23 is designed with an arc-shaped structure so that it can be centered when it contacts the bottom 13a, so that the measuring rod 20 is coaxial with the deep hole 13, and accurate and precise measurement data are obtained.
[0028] In an improved embodiment, the measuring end 23 is provided with a wear-resistant coating 23a, thereby improving the life of the measuring instrument.
Claims
1. A deep hole measuring tool for marine engines, characterized in that, The device includes a positioning block that serves as a positioning reference and is fitted onto a measuring rod. A reading scale is arranged on the measuring rod. A reading window that slides between the reading scales is provided on the positioning block. A positioning end is placed on the side of the positioning block, and the positioning end is on the same side as the measuring end of the measuring rod. A positioning step is provided on the positioning end. The outer diameter of the positioning step matches the inner diameter of the deep hole step at the deep hole entrance, so that the positioning end can be tightly embedded in the deep hole step. The measuring end has an arc structure, and the curvature of the arc structure is smaller than the curvature of the bottom of the deep hole, so that the measuring end is centered and coaxial when in contact with the bottom.
2. The deep hole measuring tool for marine engines as described in claim 1, characterized in that, The measuring end is also provided with a wear-resistant layer.
3. The deep hole measuring tool for marine engines as described in claim 1, characterized in that, The positioning block is provided with a clamping mechanism for fixing it to the measuring rod.
4. The deep hole measuring tool for marine engines as described in claim 1, characterized in that, The end of the reading ruler is provided with a protrusion, and the measuring rod is in the zero position when the positioning block contacts the protrusion.