Special auxiliary equipment for marking top dead center of diesel engine

Abstract

The utility model belongs to the technical field of diesel engines, and particularly relates to a special auxiliary device for marking a top dead center of a diesel engine. And the detection reference surface is located on the upper layer of the positioning reference surface and is parallel to the positioning reference surface, and the detection reference surface is provided with a distance sensor to detect the end face position of the piston. The positioning reference surface is arranged to ensure fitting positioning with the end face of the cylinder cover, the detection reference surface is arranged, and the distance sensor is arranged on the detection reference surface to detect the distance from the end face of the piston to the end face of the cylinder cover, so that the dead center position on the end face of the piston is detected.

Description

Technical Field

[0001] The utility model belongs to the technical field of diesel engines, and in particular relates to special auxiliary equipment for marking the top dead center of a diesel engine. Background Art

[0002] In the prior art, the top dead center marking device for diesel engine pistons uses a traditional contact mechanism consisting of a base and a dial indicator. This process is relatively cumbersome, requiring not only the flywheel to be operated but also the placement of the dial indicator probe above the piston and the reading of the dial indicator. Furthermore, if the number of revolutions of the dial indicator is missed during the reading process, the final calculation result may be completely incorrect. Therefore, this process places certain demands on the operator's computational skills, is labor-intensive and time-consuming, and is prone to errors.

[0003] Therefore, it is urgent to design a special auxiliary equipment for marking the top dead center of a diesel engine to solve the problem that errors easily occur in the reading and calculation of the dial indicator during the marking process.

[0004] It should be noted that the above information disclosed in this Background section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute prior art. Utility Model Content

[0005] The embodiments of the present disclosure at least provide a dedicated auxiliary device for marking the top dead center of a diesel engine.

[0006] In a first aspect, an embodiment of the present disclosure provides a dedicated auxiliary device for marking the top dead center of a diesel engine, comprising: a positioning reference surface adapted to fit with an end face of a cylinder head of the diesel engine;

[0007] The detection reference surface is located on the upper layer of the positioning reference surface and is arranged parallel to each other. The detection reference surface is provided with a distance sensor to detect the end surface position of the piston.

[0008] In an optional embodiment, the auxiliary device further includes a control module electrically connected to the distance sensor, and a display screen electrically connected to the control module.

[0009] In an optional embodiment, a start switch and a reset zero switch are installed above the display screen;

[0010] The start switch and the reset zero switch are both electrically connected to the control module.

[0011] In an optional embodiment, a positioning sensor is provided on the positioning reference surface to detect the parallelism between the positioning reference surface and the end face of the cylinder head.

[0012] In a second aspect, the embodiments of the present disclosure further provide a dedicated auxiliary device for marking the top dead center of a diesel engine, comprising:

[0013] A positioning reference plane and a detection reference plane are arranged parallel to each other, wherein the positioning reference plane and the detection reference plane are arranged adjacent to each other;

[0014] The detection reference surface is provided with a distance sensor for detecting the distance from the piston to the distance sensor;

[0015] The positioning reference surface is provided with a positioning sensor to detect the parallelism between the positioning reference surface and the end surface of the cylinder head;

[0016] The distance sensor and the positioning sensor are both electrically connected to the control module.

[0017] In a third aspect, the present disclosure also provides a dedicated auxiliary device for marking the top dead center of a diesel engine, including:

[0018] A positioning reference plane and a detection reference plane are arranged parallel to each other, wherein the positioning reference plane and the detection reference plane are arranged adjacent to each other;

[0019] The detection reference surface is provided with a distance sensor for detecting the distance from the piston to the distance sensor;

[0020] The positioning reference surface is provided with a positioning sensor to detect the parallelism between the positioning reference surface and the end surface of the cylinder head;

[0021] The distance sensor and the positioning sensor are both electrically connected to the control module;

[0022] The auxiliary device further includes a display screen, and the control module is electrically connected to the display screen.

[0023] In a fourth aspect, an embodiment of the present disclosure further provides a dedicated auxiliary device for marking the top dead center of a diesel engine, comprising:

[0024] A positioning reference plane and a detection reference plane are arranged parallel to each other, wherein the positioning reference plane and the detection reference plane are arranged adjacent to each other;

[0025] The detection reference surface is provided with a distance sensor for detecting the distance from the piston to the distance sensor;

[0026] The positioning reference surface is provided with a positioning sensor to detect the parallelism between the positioning reference surface and the end surface of the cylinder head;

[0027] The distance sensor and the positioning sensor are both electrically connected to the control module;

[0028] The auxiliary equipment also includes a display screen, and a start switch and a reset zero switch are installed above the display screen;

[0029] The display screen, the start switch and the reset zero switch are all electrically connected to the control module.

[0030] The beneficial effect of the present invention is that the present invention ensures the fitting positioning with the end face of the cylinder head by setting a positioning reference surface, and sets a detection reference surface and sets a distance sensor on the detection reference surface to detect the distance from the end face of the piston to the end face of the cylinder head, thereby detecting the upper dead center position of the end face of the piston.

[0031] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A perspective view of a dedicated auxiliary device for marking the top dead center of a diesel engine provided by an embodiment of the present disclosure;

[0035] Figure 2 A schematic diagram of the position of a distance sensor provided in an embodiment of the present disclosure.

[0036] In the picture:

[0037] 1. Positioning reference surface; 2. Testing reference surface;

[0038] 3. Display screen; 31. Start switch; 32. Reset zero switch;

[0039] 4. Distance sensor; 5. Positioning sensor. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0041] Research has revealed that the conventional technology used to mark the top dead center of a diesel engine piston utilizes a traditional contact mechanism consisting of a base and a dial indicator. This process is relatively cumbersome, requiring not only the flywheel to be operated but also the placement of the dial indicator probe above the piston and the reading of the dial indicator. Furthermore, if the number of revolutions of the dial indicator is missed during the reading process, the final calculation result may be completely incorrect. Therefore, this process places certain demands on the operator's computational skills, is labor-intensive and time-consuming, and is prone to errors.

[0042] The defects in the above solutions are the results obtained by the inventors after practice and careful research. Therefore, the process of discovering the above problems and the solutions proposed by this disclosure for the above problems below should be the contributions made by the inventors to this disclosure during the disclosure process.

[0043] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. The following embodiments and features thereof may be combined with one another unless they conflict. Furthermore, in the accompanying drawings, the thickness of components may be exaggerated or reduced to effectively illustrate the technical content.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0045] Based on the above research, the embodiment of the present disclosure provides a special auxiliary device for marking the top dead center of a diesel engine, comprising: a device body, Figure 1 The bottom of the device body has a positioning reference surface 1 and a detection reference surface 2 that are arranged in parallel. The size of the device body is suitable for the operator to hold it in hand. The bottom of the device body has a base, which is a nearly cubic structure. The positioning reference surface 1 and the detection reference surface 2 are both located on the bottom surface of the base, and the positioning reference surface 1 and the detection reference surface 2 are spaced apart. As an option, under the condition that the positioning reference surface 1 and the detection reference surface 2 are arranged in parallel, the detection reference surface 2 is located above the positioning reference surface 1. Figure 2, a distance sensor 4 is provided on the detection reference surface 2, and the detection end of the distance sensor 4 is perpendicular to the detection reference surface 2 and is set downward to detect the distance between the object to be detected and the distance sensor 4. Through the above setting, when using the device body to mark the top dead center of the diesel engine piston, the device body can be placed on the diesel engine body first, and the positioning reference surface 1 is aligned with the end face of the cylinder head of the diesel engine. At this time, it can be ensured that the device body is parallel to the end face of the cylinder head of the diesel engine. Then, the detection reference surface 2 is placed directly above the piston, so that the detection reference surface 2 is parallel to the end face of the cylinder head, and the distance sensor 4 and the detection reference surface 2 are perpendicular to the end face of the cylinder head. At this time, the distance sensor 4 can detect the distance between the end face of the piston and the distance sensor 4. The operator can operate the flywheel to rotate to make the piston rise. The distance sensor 4 monitors the position of the piston in real time until the piston reaches the highest point, which can be marked as the top dead center. It should be noted that the auxiliary device also has a control module inside, and the distance sensor 4 is electrically connected to the control module, that is, the distance data of the piston end face detected by the distance sensor 4 will be sent to the control module. Optionally, the control module is an STM32 processor.

[0046] Reference Figure 1 To facilitate the operator's reading, the auxiliary equipment also includes a display screen 3. The display screen 3 is electrically connected to the control module so that after the control module receives the information from the distance sensor 4, it sends the displayed numerical content to the display screen 3. Compared with a dial indicator, the reading of the dial indicator is continuous, requiring the operator to continuously observe the number of revolutions of the dial indicator pointer. If the number of revolutions is missed or miscalculated, the reading will be biased. However, the distance sensor 4, in conjunction with the control module and the display screen 3, can avoid the above problem. Since the sliding of the piston is continuous, the reading monitored by the distance sensor 4 also changes continuously. Therefore, the operator only needs to compare the size of the previous reading with the next reading, and finally select the piston position corresponding to the minimum distance reading to mark the top dead center of the piston.

[0047] Reference Figure 2 Positioning reference surface 1 is provided with a positioning sensor 5 for detecting the parallelism between positioning reference surface 1 and the cylinder head end face. Positioning sensor 5 is also electrically connected to the control module, so that upon receiving information from positioning sensor 5, the control module transmits the displayed numerical value to display screen 3, allowing the operator to determine whether positioning reference surface 1 is correctly positioned. If not, timely adjustments are required to ensure accurate readings from distance sensor 4.

[0048] Reference Figure 1 A start switch 31 and a reset zero switch 32 are installed above the display screen 3, and the start switch 31 and the reset zero switch 32 are both electrically connected to the control module.

[0049] The reset zeroing switch 32 is electrically connected to the distance sensor 4. When the positioning sensor 5 is parallel to the end face of the cylinder head, the reset zeroing switch 32 is pressed to zero the distance sensor 4. Then the distance of the piston is detected to obtain the distance from the piston to the end face of the cylinder head and mark the top dead center.

[0050] In addition, the present disclosure also provides a method for marking the top dead center of a diesel engine. The above-mentioned dedicated auxiliary device for marking the top dead center of a diesel engine is used to perform the method to mark the top dead center on the piston end face of the diesel engine. Specifically, the method includes:

[0051] Step S1, press the start switch 31 and place the device body on the diesel engine body;

[0052] Step S2, adjusting the positioning reference plane 1 so that the positioning reference plane 1 is parallel to the end face of the cylinder head;

[0053] Step S3, pressing the reset zero switch 32, and moving the detection reference surface 2 to above the piston so that the distance sensor 4 faces the end surface of the piston;

[0054] Step S4: rotate the flywheel to drive the piston to slide, read the minimum distance between the piston and the distance sensor 4 on the display screen 3, and mark the top dead center.

[0055] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. With the above-mentioned ideal embodiments of the present invention as inspiration, and through the above-mentioned description, relevant staff can make various changes and modifications without departing from the scope of the technical idea of ​​the present invention. The technical scope of the present utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A special auxiliary device for marking the top dead center of a diesel engine, characterized in that: include: A positioning reference surface (1) adapted to fit with an end face of a cylinder head of a diesel engine; The detection reference surface (2) is located on the upper layer of the positioning reference surface (1) and is arranged parallel to each other. The detection reference surface (2) is provided with a distance sensor (4) to detect the end surface position of the piston.

2. The diesel engine top dead center marking auxiliary device according to claim 1, characterized in that: The auxiliary device further comprises a control module electrically connected to the distance sensor (4), and a display screen (3) electrically connected to the control module.

3. The diesel engine top dead center marking auxiliary device according to claim 2, characterized in that: A start switch (31) and a reset zero switch (32) are installed above the display screen (3); The start switch (31) and the reset zero calibration switch (32) are both electrically connected to the control module.

4. The diesel engine top dead center marking auxiliary device according to claim 1, characterized in that: The positioning reference surface (1) is provided with a positioning sensor (5) for detecting the parallelism between the positioning reference surface (1) and the cylinder head end surface.

5. A special auxiliary device for marking the top dead center of a diesel engine, characterized in that: include: A positioning reference surface (1) and a detection reference surface (2) are arranged parallel to each other, wherein the positioning reference surface (1) and the detection reference surface (2) are arranged adjacent to each other; The detection reference surface (2) is provided with a distance sensor (4) for detecting the distance from the piston to the distance sensor (4); The positioning reference surface (1) is provided with a positioning sensor (5) for detecting the parallelism between the positioning reference surface (1) and the end surface of the cylinder head; The distance sensor (4) and the positioning sensor (5) are both electrically connected to the control module.

6. A special auxiliary device for marking the top dead center of a diesel engine, characterized in that: include: A positioning reference surface (1) and a detection reference surface (2) are arranged parallel to each other, wherein the positioning reference surface (1) and the detection reference surface (2) are arranged adjacent to each other; The detection reference surface (2) is provided with a distance sensor (4) for detecting the distance from the piston to the distance sensor (4); The positioning reference surface (1) is provided with a positioning sensor (5) for detecting the parallelism between the positioning reference surface (1) and the end surface of the cylinder head; The distance sensor (4) and the positioning sensor (5) are both electrically connected to the control module; The auxiliary device further comprises a display screen (3), and the control module is electrically connected to the display screen (3).

7. A special auxiliary device for marking the top dead center of a diesel engine, characterized in that: include: A positioning reference surface (1) and a detection reference surface (2) are arranged parallel to each other, wherein the positioning reference surface (1) and the detection reference surface (2) are arranged adjacent to each other; The detection reference surface (2) is provided with a distance sensor (4) for detecting the distance from the piston to the distance sensor (4); The positioning reference surface (1) is provided with a positioning sensor (5) for detecting the parallelism between the positioning reference surface (1) and the end surface of the cylinder head; The distance sensor (4) and the positioning sensor (5) are both electrically connected to the control module; The auxiliary device further comprises a display screen (3), and a start switch (31) and a reset zero switch (32) are mounted above the display screen (3); The display screen (3), the start switch (31) and the reset zero switch (32) are all electrically connected to the control module.

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