A calibration method for multifunctional engine timing structure

Abstract

The present invention discloses a multifunctional engine timing structure, comprising a flywheel housing and a flywheel installed in the flywheel housing, wherein the circumferential bottom surface of the flywheel housing is provided with a pointer surface and a flywheel housing turning hole, and the circumferential surface of the flywheel is provided with flywheel turning holes at intervals, the flywheel housing turning holes correspond to the flywheel turning holes, and the spacing between two adjacent flywheel turning holes is less than the length of the flywheel housing turning holes, and the circumferential surface of the flywheel is also engraved with a pointer line, and the pointer line corresponds to the position of the pointer surface. The multifunctional engine timing structure of the present invention is integrated and installed on the flywheel housing, and while satisfying the pointer function, it reduces parts and reduces manufacturing costs.

Description

Technical Field

[0001] The invention relates to the technical field of engines, and in particular to a calibration method for a multifunctional engine timing structure. Background Art

[0002] The timing pointer is an important component used to check the timing of the engine during assembly and maintenance. The existing technology is to install a pointer at the front or rear end of the engine, and use it in conjunction with the timing scale line on the front pulley or rear flywheel. Its main disadvantages are: additional parts, affecting the engine space layout, single function, high cost, etc. Summary of the invention

[0003] In view of the above problems, the present invention provides a calibration method for a multifunctional engine timing structure, which is integrated and installed on a flywheel housing, and satisfies the pointer function while reducing parts and components and lowering manufacturing costs.

[0004] The present invention adopts the following technical solutions to achieve the above purpose:

[0005] A method for checking a multifunctional engine timing structure comprises a flywheel housing and a flywheel installed in the flywheel housing, wherein a pointer surface and a flywheel housing turning hole are arranged on the circumferential bottom surface of the flywheel housing, flywheel turning holes are arranged at intervals on the circumferential surface of the flywheel, the flywheel housing turning holes correspond to the flywheel turning holes, and the spacing between two adjacent flywheel turning holes is less than the length of the flywheel housing turning hole, and a pointer line is also engraved on the circumferential surface of the flywheel, and the position of the pointer line corresponds to the pointer surface.

[0006] During the engine assembly and maintenance processes, take a hard rod and insert it into the flywheel turning hole of the flywheel through the flywheel housing turning hole, and slide the flywheel turning hole from the left side of the flywheel housing turning hole to the right side. Because the distance between two adjacent flywheel turning holes is smaller than the length of the flywheel housing turning hole, the hard rod can be pulled out from the flywheel turning hole on the right side of the flywheel housing turning hole, and continue to slide the flywheel turning hole on the left side of the flywheel housing turning hole to the right through the hard rod. Repeat this process of prying the flywheel back and forth with the hard rod until the pointer line of the flywheel coincides with any position of the pointer surface of the flywheel housing. Stop sliding the flywheel and the engine timing calibration is completed.

[0007] Preferably, the length of the flywheel housing turning hole extends along the circumferential direction of the flywheel, and the pointer surface and the length direction of the flywheel housing turning hole are perpendicular to each other.

[0008] Preferably, the diameter of the flywheel turning hole is smaller than the width of the flywheel housing turning hole.

[0009] Preferably, a back-cut groove is cast on one end of the pointer surface away from the flywheel housing turning hole.

[0010] Preferably, the needle face is parallel to the engine centerline.

[0011] Preferably, except for the pointer surface, the circumferential surface of the flywheel housing is a casting surface.

[0012] Preferably, the pointer line is parallel to the engine centerline.

[0013] The beneficial effects of the present invention are:

[0014] 1. The timing pointer is integrated on the flywheel housing, which not only meets the pointer function, but also reduces parts and manufacturing costs;

[0015] 2. Realize multiple functions: The plane design of the pointer surface meets the function of the engine calibration pointer; the design of the flywheel housing turning hole meets the flywheel turning demand; the pointer surface is arranged at the bottom of the flywheel housing to meet the drainage demand of the flywheel housing cavity; the design of the pointer surface and the flywheel housing turning hole makes the flywheel housing space spacious, meeting the demand for the flywheel observation window;

[0016] 3. Cost saving: The timing pointer is produced by casting, which is low-cost; reducing the traditional pointer installation, reducing production costs and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a multifunctional engine timing structure provided by the present invention;

[0018] Figure 2 A bottom view of a flywheel housing in a multifunctional engine timing structure provided by the present invention;

[0019] Figure 3 A schematic diagram of the structure of a flywheel housing in a multifunctional engine timing structure provided by the present invention;

[0020] Figure 4 A bottom view of a flywheel housing in a multifunctional engine timing structure provided by the present invention;

[0021] Figure 5 The present invention is a schematic assembly diagram of the multifunctional engine timing structure provided by the present invention.

[0022] In the figure, 1-flywheel housing, 2-flywheel, 3-pointer surface, 4-flywheel housing turning hole, 5-flywheel turning hole, 6-pointer line, 7-knife back groove. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-5 The present invention is described in detail with specific embodiments.

[0024] Please also see Figure 1 , Figure 2 and Figure 5The embodiment of the present invention provides a method for checking a multifunctional engine timing structure, wherein the timing structure includes a flywheel housing 1 and a flywheel 2 installed in the flywheel housing 1. The circumferential bottom surface of the flywheel housing 1 is provided with a pointer surface 3 and a flywheel housing turning hole 4, and the circumferential surface of the flywheel 2 is provided with flywheel turning holes 5 at intervals, the flywheel housing turning holes 4 correspond to the flywheel turning holes 5, and the spacing between two adjacent flywheel turning holes 5 is less than the length of the flywheel housing turning holes 4. The circumferential surface of the flywheel 2 is also engraved with a pointer line 6, and the pointer line 6 corresponds to the position of the pointer surface 3.

[0025] During the engine assembly and maintenance processes, a hard rod is inserted into the flywheel turning hole 5 of the flywheel 2 through the flywheel housing turning hole 4, and the flywheel turning hole 5 is slid from the left side of the flywheel housing turning hole 4 to the right side. Since the distance between two adjacent flywheel turning holes 5 is smaller than the length of the flywheel housing turning hole 4, the hard rod can be pulled out from the flywheel turning hole 5 on the right side of the flywheel housing turning hole 4, and the flywheel turning hole 5 on the left side of the flywheel housing turning hole 4 is continued to be slid to the right by the hard rod. The flywheel 2 is repeatedly pried back and forth by the hard rod to rotate until the pointer line 6 of the flywheel 2 coincides with any position of the pointer surface 3 of the flywheel housing 1, and the sliding of the flywheel 2 is stopped to complete the engine timing calibration.

[0026] Furthermore, the length of the flywheel housing turning hole 4 extends along the circumferential direction of the flywheel 2, that is, the flywheel housing turning hole 4 is arranged horizontally. The diameter of the flywheel turning hole 5 is smaller than the width of the flywheel housing turning hole 4, which greatly facilitates the hard turning rod to pry the flywheel 2 back and forth to rotate. The pointer surface 3 and the length direction of the flywheel housing turning hole 4 are perpendicular to each other. The pointer surface 3 can be arranged on the top surface of the flywheel housing turning hole 4, and can also be arranged on the bottom surface of the flywheel housing turning hole 4.

[0027] For further information, see Figure 4 A back cut groove 7 is cast on one end of the pointer surface 3 away from the flywheel housing turning hole 4.

[0028] Further, please also see Figure 1 and Figure 2 , the pointer surface 3 is parallel to the center line of the engine. The pointer surface 3 and the flywheel housing turning hole 4 further serve as observation windows for the flywheel 2, saving parts and components, thereby reducing the size of the engine. The pointer line 6 is also parallel to the center line of the engine, which facilitates quick identification of the overlap between the pointer line 6 and the pointer surface 3.

[0029] Furthermore, the pointer surface 3 and the flywheel housing turning hole 4 are both close to the bottom end of the flywheel housing 1 , meeting the drainage requirement of the inner cavity of the flywheel housing 1 .

[0030] For further information, see Figure 3 Except for the pointer surface 3, the circumferential surface of the flywheel housing 1 is a casting surface, which reduces the production cost.

[0031] Although the present invention has been described in detail above with specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A method for checking a multifunctional engine timing structure, characterized in that: The flywheel housing (1) comprises a flywheel (2) installed in the flywheel housing (1), wherein the circumferential bottom surface of the flywheel housing (1) is provided with a pointer surface (3) and a flywheel housing turning hole (4), and the circumferential surface of the flywheel (2) is provided with flywheel turning holes (5) at intervals, the flywheel housing turning holes (4) correspond to the flywheel turning holes (5), and the distance between two adjacent flywheel turning holes (5) is less than the length of the flywheel housing turning holes (4), and the circumferential surface of the flywheel (2) is also engraved with a pointer line (6), and the pointer line (6) corresponds to the position of the pointer surface (3); In the process of assembling and repairing the engine, a hard rod is inserted into the flywheel turning hole (5) of the flywheel (2) through the flywheel housing turning hole (4), and the flywheel turning hole (5) is slid from the left side of the flywheel housing turning hole (4) to the right side. Since the distance between two adjacent flywheel turning holes (5) is smaller than the length of the flywheel housing turning hole (4), the hard rod can be pulled out from the flywheel turning hole (5) on the right side of the flywheel housing turning hole (4), and the flywheel turning hole (5) on the left side of the flywheel housing turning hole (4) is continuously slid to the right by the hard rod. The flywheel (2) is repeatedly pried back and forth by the hard rod to rotate until the pointer line (6) of the flywheel (2) coincides with any position of the pointer surface (3) of the flywheel housing (1), and the sliding of the flywheel (2) is stopped, and the engine timing calibration is completed.

2. A method for checking a multifunctional engine timing structure according to claim 1, characterized in that: The length of the flywheel housing turning hole (4) extends along the circumferential direction of the flywheel (2), and the pointer surface (3) and the length direction of the flywheel housing turning hole (4) are perpendicular to each other.

3. The method for calibrating a multifunctional engine timing structure according to claim 1, characterized in that: The diameter of the flywheel turning hole (5) is smaller than the width of the flywheel housing turning hole (4).

4. The method for calibrating a multifunctional engine timing structure according to claim 1, characterized in that: A cutter recess (7) is cast on one end of the pointer surface (3) away from the flywheel housing turning hole (4).

5. The method for calibrating a multifunctional engine timing structure according to claim 1, characterized in that: The pointer face (3) is parallel to the engine centerline.

6. The method for calibrating a multifunctional engine timing structure according to claim 1, characterized in that: Except for the pointer surface (3), all circumferential surfaces of the flywheel housing (1) are cast surfaces.

7. The method for calibrating a multifunctional engine timing structure according to claim 1, characterized in that: The pointer line (6) is parallel to the engine centerline.

Images