Engine cylinder block and engine
By setting multiple Z-axis positioning references and an inverted V-shaped top reference surface at the bottom of the engine cylinder block blank, and using X-axis and Y-axis cylinder bore positioning, the problem of large cylinder bore position error is solved, the pass rate of cylinder bore wall thickness is improved, and the product processing quality is enhanced.
Patent Information
- Application Number
- CN202520291834.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-21
AI Technical Summary
The existing positioning reference structure of the engine cylinder block blank is unreasonable, resulting in large assembly errors, making it difficult to correct cylinder bore position errors and affecting product processing quality.
Multiple Z-axis positioning references are set at the bottom of the cylinder blank, and two inverted V-shaped reference surfaces are set at the top. The middle cylinder bore is used as the X-axis positioning reference, and the edge cylinder bore is used as the Y-axis positioning reference. This structure constrains the rotation of the cylinder to correct position deviation.
This significantly improved the machining quality of the cylinder bore, increasing the pass rate of the blank cylinder bore wall thickness difference from less than 50% to over 99%, thus ensuring product machining quality.
Smart Images
Figure CN223578050U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of engine technology, and in particular to an engine block and an engine. Background Technology
[0002] The engine block is a structure that contains the cylinders and other components of an internal combustion engine. In early automobile engines, the engine block consisted only of the cylinder block and had a separate crankcase. Modern engine blocks typically integrate the crankcase and cylinder block into a single component.
[0003] The existing engine block blanks have X, Y, and Z direction references located on the top surface of the cylinder block. The Z direction reference uses three points as the height reference, and the center of one hole on the top surface is used as the X direction reference (i.e., the length reference), and the center of the other hole on the top surface is used as the Y direction reference (i.e., the width reference). However, this positioning reference structure has the following problems: (1) The three references in the Z direction are formed by three independent sand cores. When combined with the three cylinder hole sand cores, the combination error will be large, and the angle between the reference surface formed by the three reference points and the three sets of cylinder holes cannot be guaranteed to be consistent; (2) The combination error of the X and Y direction references with the three cylinder hole sand cores is large, resulting in a large deviation between the X and Y direction positions of the cylinder holes and the theoretical values. The above two problems will make it difficult for the positioning fixture to correct the X and Y position errors of the cylinder holes, and it will also be difficult to correct the rotational position errors of multiple cylinder holes. Ultimately, this will cause the cylinder hole wall thickness to exceed the tolerance, affecting the product processing quality, and even causing the product to be scrapped. Utility Model Content
[0004] The main purpose of this application is to provide an engine block and engine, which aims to solve the technical problem that the positioning reference structure of the existing engine block blank is not reasonably set, making it difficult to correct position errors and affecting the product processing quality.
[0005] To achieve the above objectives, this application provides an engine cylinder block, including a cylinder block blank. The bottom of the cylinder block blank is flat, and multiple Z-axis positioning references are provided on the bottom of the cylinder block blank. The top of the cylinder block blank has two reference surfaces arranged in an inverted V shape. Multiple cylinder holes are opened on both reference surfaces, and the cylinder holes on one reference surface correspond to the cylinder holes on the other reference surface. The cylinder hole located in the middle on any reference surface is set as an X-axis positioning reference. The cylinder holes located at the edge on one reference surface and the corresponding cylinder holes located at the edge on the other reference surface form a group. Both groups of cylinder holes are set as Y-axis positioning references. Wherein, the X-axis is the length direction of the cylinder block blank, the Y-axis is the width direction of the cylinder block blank, and the Z-axis is the height direction of the cylinder block blank.
[0006] Optionally, there are three Z-axis positioning references, and the three Z-axis positioning references are arranged in a triangular pattern.
[0007] Optionally, the Z-axis positioning reference is a blind hole opened at the bottom of the cylinder block blank.
[0008] Optionally, the depth of the blind hole is 1-3 mm.
[0009] Optionally, each of the two reference surfaces has three cylinder holes. The cylinder holes on one of the reference surfaces are sequentially designated as the first reference hole, the second reference hole, and the third reference hole, while the cylinder holes on the other reference surface are sequentially designated as the fourth reference hole, the fifth reference hole, and the sixth reference hole. The second or fifth reference hole serves as the X-axis positioning reference, and the first and fourth reference holes, as well as the third and sixth reference holes, respectively form the Y-axis positioning references.
[0010] Optionally, the cylinder bores on both reference surfaces are provided with 4 or 5.
[0011] Optionally, the included angle between the two reference planes is 60° or 90°.
[0012] Optionally, the cylinder block blank can be made of aluminum alloy or cast iron.
[0013] This application also provides an engine, including the engine block described above.
[0014] The beneficial effects that this application can achieve are as follows:
[0015] This application includes a cylinder block blank. The bottom of the cylinder block blank is flat, and multiple Z-axis positioning references are provided on the bottom of the cylinder block blank. The top of the cylinder block blank has two reference surfaces arranged in an inverted V shape. Multiple cylinder holes are opened on both reference surfaces, and the cylinder holes on one reference surface correspond to the cylinder holes on the other reference surface. The cylinder hole located in the middle on any reference surface is set as an X-axis positioning reference. The cylinder hole located at the edge on one reference surface and the corresponding cylinder hole located at the edge on the other reference surface form a group. Both groups of cylinder holes are set as Y-axis positioning references. Wherein, the X-axis is the length direction of the cylinder block blank, the Y-axis is the width direction of the cylinder block blank, and the Z-axis is the height direction of the cylinder block blank. Based on the structure of this application, the Z-axis positioning reference is set at the bottom of the cylinder blank, that is, the Z-axis positioning reference is located on the bottom sand core, and the blank casting consistency is good. When positioning the cylinder bore, one of the cylinder bores located in the middle position is first used as the X-axis positioning reference for X-direction positioning. Then, two sets of cylinder bores located at the edge are used as the Y-axis positioning reference for Y-direction positioning. Since the position of the X-axis positioning reference is constrained, the cylinder can only rotate around the center of the X-axis positioning reference and the X-direction position will not change. This can correct the cylinder bore position deviation to the greatest extent and improve the product processing quality. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0017] Figure 1 This is a schematic diagram of the structure of an engine cylinder block according to an embodiment of this application;
[0018] Figure 2 This is a schematic diagram of an engine block structure from a bottom view, as shown in an embodiment of this application.
[0019] Figure 3 This is a structural schematic diagram of the front view of an engine cylinder block according to an embodiment of this application;
[0020] Figure 4 This is a schematic diagram of a 6-cylinder structure of an engine block according to an embodiment of this application.
[0021] Figure label:
[0022] 110 - Cylinder block blank, 120 - Z-axis positioning datum, 130 - Datum surface, 140 - Cylinder bore, 141 - First datum hole, 142 - Second datum hole, 143 - Third datum hole, 144 - Fourth datum hole, 145 - Fifth datum hole, 146 - Sixth datum hole.
[0023] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0026] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0027] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.
[0028] Example 1
[0029] Reference Figures 1-4 This embodiment provides an engine cylinder block, including a cylinder block blank 110. The bottom of the cylinder block blank 110 is flat, and multiple Z-axis positioning references 120 are provided on the bottom of the cylinder block blank 110. The top of the cylinder block blank 110 is provided with two reference surfaces 130, which are arranged in an inverted V shape. Multiple cylinder holes 140 are provided on both reference surfaces 130, and the cylinder holes 140 on one reference surface 130 correspond to the cylinder holes 140 on the other reference surface 130. The cylinder hole 140 located in the middle on any reference surface 130 is set as an X-axis positioning reference. The cylinder holes 140 located at the edge of one reference surface 130 and the corresponding cylinder holes 140 located at the edge of the other reference surface 130 form a group. Both groups of cylinder holes 140 are set as Y-axis positioning references. Wherein, the X-axis is the length direction of the cylinder block blank 110, the Y-axis is the width direction of the cylinder block blank 110, and the Z-axis is the height direction of the cylinder block blank 110.
[0030] In this embodiment, the Z-axis positioning reference 120 is set at the bottom of the cylinder blank 110, that is, the Z-axis positioning reference 120 is located on the bottom sand core, and the blank casting consistency is good. When positioning the cylinder bore 140, one of the cylinder bores 140 located in the middle position is first used as the X-axis positioning reference for X-direction positioning. Then, two sets of cylinder bores 140 located at the edge are used as the Y-axis positioning reference for Y-direction positioning. Since the position of the X-axis positioning reference is constrained, the cylinder can only rotate around the center of the X-axis positioning reference and the X-direction position will not change. This can correct the position deviation of the cylinder bore 140 to the greatest extent and improve the product processing quality.
[0031] After processing and verification of over 100,000 cylinder blocks, the pass rate of the blank cylinder bore 140 with a wall thickness difference within 1.5mm, processed using the reference structure of the cylinder block blank 110 of this embodiment, is over 99%. In contrast, the pass rate of the blank cylinder bore 140 with a wall thickness difference within 1.5mm processed by the prior art is less than 50%. Therefore, this embodiment significantly improves the processing quality.
[0032] As an optional implementation, there are three Z-axis positioning references 120, and the three Z-axis positioning references 120 are arranged in a triangular pattern. A reference plane can be determined by the three Z-axis positioning references 120 arranged in a triangular pattern.
[0033] As an optional implementation, the Z-axis positioning reference 120 is a blind hole opened at the bottom of the cylinder blank 110 to facilitate positioning.
[0034] As an optional implementation, the depth of the blind hole is 1-3mm, preferably 1mm, to meet the positioning and process structure design requirements.
[0035] As an optional implementation, each of the two reference surfaces 130 has three cylinder holes 140. The cylinder holes 140 on one of the reference surfaces 130 are sequentially designated as the first reference hole 141, the second reference hole 142, and the third reference hole 143. The cylinder holes 140 on the other reference surface 130 are sequentially designated as the fourth reference hole 144, the fifth reference hole 145, and the sixth reference hole 146. The second reference hole 142 or the fifth reference hole 145 serves as the X-axis positioning reference. The first reference hole 141 and the fourth reference hole 144 form one group, and the third reference hole 143 and the sixth reference hole 146 form another group, which respectively form the Y-axis positioning references.
[0036] In this embodiment, each of the two reference surfaces 130 has three cylinder bores 140, forming a V6 cylinder block structure. In this case, the X direction is positioned using the middle cylinder bore 140 (i.e., the second reference bore 142 or the fifth reference bore 145). When the positioning points corresponding to the first reference bore 141 and the fourth reference bore 144 are positioned in the Y direction with the positioning points corresponding to the third reference bore 143 and the sixth reference bore 146, since the X direction position is constrained, the cylinder block can only rotate around the center of the second reference bore 142 or the fifth reference bore 145 and the X direction position will not change. Therefore, the freedom of the cylinder block in the X and Y directions is constrained by five cylinder bores. This positioning structure can correct the cylinder bore position deviation to the greatest extent.
[0037] As an optional implementation, the cylinder bores 140 on both reference surfaces 130 are provided with 4 or 5 holes, that is, to form a V8 or V10 cylinder block structure respectively, which can also be applied to the above-mentioned positioning reference structure.
[0038] As an optional implementation, the included angle between the two reference planes 130 is 60° or 90°, which meets the design requirements.
[0039] As an optional implementation, the cylinder block blank 110 can be made of aluminum alloy or cast iron. Aluminum alloy cylinder blocks have the advantages of being lightweight, having good thermal conductivity, and high strength, but they are more expensive and easily damaged; cast iron cylinder blocks are cheaper, but they are heavier and have poorer thermal conductivity. The choice can be made according to the application.
[0040] Example 2
[0041] This embodiment also provides an engine, including an engine block as described in the above embodiments, thereby improving engine quality.
[0042] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.
Claims
1. An engine cylinder block, characterized in that, The cylinder block blank includes a cylinder block blank with a flat bottom and multiple Z-axis positioning references on the bottom. The top of the cylinder block blank has two reference surfaces arranged in an inverted V-shape. Multiple cylinder holes are formed on each of the two reference surfaces, with one cylinder hole on one reference surface corresponding to the other. The cylinder hole in the middle of any reference surface is designated as an X-axis positioning reference. A cylinder hole at the edge of one reference surface and its corresponding cylinder hole at the edge of the other reference surface form a group, and both groups of cylinder holes are designated as Y-axis positioning references. Here, X-axis represents the length of the cylinder block blank, Y-axis represents the width of the cylinder block blank, and Z-axis represents the height of the cylinder block blank.
2. An engine block as described in claim 1, characterized in that, There are three Z-axis positioning references, and the three Z-axis positioning references are arranged in a triangular pattern.
3. An engine block as described in claim 1 or 2, characterized in that, The Z-axis positioning reference is a blind hole opened at the bottom of the cylinder blank.
4. An engine block as described in claim 3, characterized in that, The depth of the blind hole is 1-3 mm.
5. An engine block as described in claim 1, characterized in that, Each of the two reference surfaces has three cylinder holes. The cylinder holes on one of the reference surfaces are sequentially designated as the first reference hole, the second reference hole, and the third reference hole, and the cylinder holes on the other reference surface are sequentially designated as the fourth reference hole, the fifth reference hole, and the sixth reference hole. The second reference hole or the fifth reference hole is the X-axis positioning reference. The first reference hole and the fourth reference hole form one group, and the third reference hole and the sixth reference hole form another group, which respectively form the Y-axis positioning reference.
6. An engine block as described in claim 1, characterized in that, The cylinder bores on both reference surfaces are provided with 4 or 5 holes.
7. An engine block as described in claim 1, characterized in that, The angle between the two reference planes is 60° or 90°.
8. An engine block as described in claim 1, characterized in that, The cylinder blank is made of aluminum alloy or cast iron.
9. An engine, characterized in that, Includes an engine block as described in any one of claims 1-8.