CN201166087Y - Improved alignment structure - Google Patents

Abstract

The improved alignment structure of the utility model is that the crankshaft counterweight of the crankshaft includes a first alignment mark, and the driven gear of the balance shaft includes a second alignment mark and a viewing hole. The viewing hole is adjacent to the second alignment mark and corresponds to the first alignment mark, and the second alignment mark is aligned with the first alignment mark through the viewing hole. The aforementioned second alignment mark is located on a side relatively far away from the balance shaft counterweight. The crankshaft counterweight is in the shape of an anchor and includes an anchor crown and an anchor stem. The first alignment mark is located on a side of the anchor stem relatively far away from the anchor crown. During assembly, the crankshaft counterweight and the balance shaft counterweight will not overlap each other, so there is no need to consider the relative positions of the two during assembly, that is, when the first alignment mark and the second alignment mark are aligned and positioned with each other, the convenience of assembly can be increased at the same time.

Description

Alignment Improvement Structure

technical field

The utility model relates to an improved alignment structure, in particular to an improved alignment structure suitable for aligning a crankshaft and a balance shaft in an engine at a specific phase angle.

Background technique

For a locomotive, when the crankshaft and balance shaft inside the engine are assembled, there will be a positioning requirement for a specific phase angle between the crankshaft and the balance shaft. Therefore, traditionally, the drive gear of the crankshaft and the driven gear of the balance shaft Engraving alignment marks to meet the needs of alignment and positioning.

However, when the outer diameter of the bearing of the crankshaft increases due to the increase in engine horsepower, or the wheelbase between the crankshaft and the balance shaft is shortened due to the miniaturization of the engine, or due to other special configuration requirements, etc., all will lead to The outer diameter of the drive gear of the crankshaft is smaller than the outer diameter of the bearing of the crankshaft, that is, the bearing of the crankshaft will cover the drive gear of the crankshaft when viewed from the side, so the alignment marks of the drive gear are covered and the alignment cannot be achieved. need.

Please also refer to the top view of the known engine crankshaft and engine balance shaft shown in Figure 1 and the side view of the known engine crankshaft and engine balance shaft shown in Figure 2, which shows an engine crankshaft 91 and an engine balance shaft 92, the engine The crankshaft 91 is coaxially provided with a first bearing 911 , a second bearing 912 , a first crankshaft counterweight 913 , a second crankshaft counterweight 914 , and a driving gear 915 .

Wherein, the first crankshaft counterweight 913, the driving gear 915, and the first bearing 911 are adjacent to each other and coaxially assembled on the engine crankshaft 91, and the outer diameter of the first bearing 911 is larger than the outer diameter of the driving gear 915, so When viewed from the side, the first bearing 911 covers the driving gear 915 , and a first alignment mark 916 is engraved on the first crankshaft counterweight 913 .

In addition, the engine balance shaft 92 is coaxially provided with a driven gear 921 and a balance shaft counterweight 922. The driven gear 921 and the driving gear 915 mesh with each other, and a second alignment mark is engraved on the driven gear 921. 923, and a viewing hole 924, the second alignment mark 923 and the viewing hole 924 are adjacent to each other, and through the viewing hole 924, the first alignment mark 916 and the second alignment mark 923 can be aligned with each other to achieve positioning need.

However, in the above structure, when the first alignment mark 916 and the second alignment mark 923 are aligned with each other, as shown in FIG. , the relative positional relationship between the two must be considered, so it is easy to increase the inconvenience of assembly, which is not very ideal.

Utility model content

The purpose of the utility model is to provide an alignment improvement mechanism which is more convenient to assemble.

The utility model adopts the following technical features in order to solve the above object.

The alignment improvement structure of the present utility model is used together with an engine crankshaft and an engine balance shaft, wherein the coaxial group of the engine crankshaft is provided with a crankshaft counterweight, a bearing, and a driving gear, and the driving gear includes a first outer diameter, The bearing includes a second outer diameter that is larger than the first outer diameter of the drive gear, and the crankshaft weight includes a first alignment mark.

In addition, the balance shaft coaxial group is provided with a balance shaft counterweight and a driven gear, the driven gear meshes with the above-mentioned driving gear, and the driven gear includes a second alignment mark and a viewing hole, wherein the viewing hole The second alignment mark is adjacent to and corresponding to the first alignment mark, and the second alignment mark is aligned with the first alignment mark through the viewing hole.

The utility model is characterized in that the above-mentioned second alignment mark is located on the side relatively far away from the counterweight of the balance shaft. The counterweight of the crankshaft is in the shape of a ship anchor and includes an anchor crown and an anchor stem. The anchor stem is connected to the anchor crown. part, and the first alignment mark is located on the side of the anchor body relatively away from the anchor crown.

Therefore, with the above structure, the crankshaft counterweight and the balance shaft counterweight will not overlap each other during assembly, that is, it is not necessary to consider the relative positional relationship between the crankshaft counterweight and the balance shaft counterweight during assembly. , so when the first alignment mark and the second alignment mark are aligned and positioned with each other, the convenience of assembly can be increased at the same time.

The above-mentioned anchor portion can be equipped with a crank pin, and the crank pin includes an end surface, and the first alignment mark is located on the end surface.

In addition, the first alignment mark can be a straight line drawn on the crankshaft counterweight, for example, drawn on the crankshaft counterweight with tools such as oil-based pens and paints. Of course, the first alignment mark can also be directly engraved on the crankshaft counterweight, for example engraved as a groove mark. The second alignment mark can also be designed in the aforementioned manner.

The advantage of the utility model is that when the first alignment mark and the second alignment mark are aligned and positioned with each other, the convenience of assembly can be increased at the same time.

Description of drawings

Fig. 1 is the top view of conventional engine crankshaft and engine balance shaft;

Fig. 2 is the side view of conventional engine crankshaft and engine balance shaft;

Fig. 3 is the plan view of engine crankshaft and engine balance shaft of a preferred embodiment of the present utility model;

Fig. 4 is a side view of an engine crankshaft and an engine balance shaft in a preferred embodiment of the present invention.

Symbol Description

Engine crankshaft 1 Crankshaft counterweight 11

The first pair of positive marks 111 bearing 12

Drive gear 13 Another crankshaft counterweight 14

Another bearing 15 engine balance shaft 2

Balance shaft counterweight 21 Second alignment mark 211

Sight hole 212 Driven gear 23

Anchor Crown 31 Anchor Stem 32

Crankshaft pin 4 End face 41

Engine crankshaft 91 First bearing 911

The second bearing 912 The first crankshaft counterweight 913

Second crankshaft counterweight 914 drive gear 915

The first pair of positive marks 916 engine balance shaft 92

Driven gear 921 Balance shaft counterweight 922

The second pair of positive marks 923 Viewing hole 924

Detailed ways

Please also refer to the top view of the engine crankshaft and the engine balance shaft of a preferred embodiment of the utility model shown in Figure 3 and the side view of the engine crankshaft and the engine balance shaft of a preferred embodiment of the utility model shown in Figure 4, wherein It shows an engine crankshaft 1 and an engine balance shaft 2, and the two can be aligned and positioned with each other through the alignment improvement structure of the present invention.

The above-mentioned engine crankshaft 1 coaxial group is provided with a crankshaft counterweight 11, a bearing 12, and a drive gear 13 (the other side of the engine crankshaft 1 is coaxially provided with another crankshaft counterweight 14 and another bearing 15), wherein the driving gear 13 includes a first outer diameter D1, the bearing 12 includes a second outer diameter D2, and this second outer diameter D2 is larger than the first outer diameter D1 of the driving gear 13, and the crankshaft counterweight 11 includes A first pair of positive marks 111 .

In addition, the coaxial group of the balance shaft 2 is provided with a balance shaft counterweight 21 and a driven gear 23, the driven gear 23 meshes with the drive gear 13 of the above-mentioned engine crankshaft 1, and the driven gear 23 also includes a second pair of positive mark 211, and a viewing hole 212, wherein the viewing hole 212 is adjacent to the second alignment mark 211 and corresponds to the first alignment mark 111, and through the viewing hole 212, the second alignment mark 211 is aligned with the first pair Positive sign 111.

The above-mentioned second alignment mark 211 is located on the side relatively away from the balance shaft counterweight 21; the crankshaft counterweight 11 is in the shape of a ship anchor and includes an anchor crown portion 31 (crown portion) and an anchor portion 32 (stock portion) , the anchor portion 32 and the anchor crown 31 are connected to each other, and the first alignment mark 111 is located on a side of the anchor portion 32 relatively away from the anchor crown 31 .

In this embodiment, the anchor portion 32 is parallel to a crankpin 4 , and the crankpin 4 includes an end surface 41 , and the first alignment mark 111 is located on the end surface 41 .

Also in this embodiment, the first alignment mark 111 is a straight line and marked on the crankshaft counterweight 11 , for example, it can be drawn on the crankshaft counterweight 11 with oil-based pen, paint and other tools. Of course, the first alignment mark 111 can also be directly engraved on the crankshaft counterweight 11 , for example engraved as a groove mark.

Similarly, the second alignment mark 211 is a straight line and marked on the driven gear 23 , for example, it can be drawn on the driven gear 23 with tools such as oil-based pens and paints. Of course, the second alignment mark 211 can also be directly engraved on the driven gear 23 , for example engraved as a groove mark.

Therefore, with the above structure, during assembly, the crankshaft counterweight 11 and the balance shaft counterweight 21 will not overlap each other, that is, there is no need to consider the crankshaft counterweight 11 and the balance shaft counterweight 21 when assembling. Therefore, when the first alignment mark 111 and the second alignment mark 211 are aligned and positioned with each other, the convenience of assembly can be increased at the same time.

Claims (4)

1. one kind aligns structure-improved, an arrange in pairs or groups engine crankshaft and an engine trunnion shaft uses, wherein this engine crankshaft is provided with a counter weight piece for coaxial group, one bearing, an and actuation gear, this actuation gear comprises one first external diameter, this bearing comprises one second external diameter, this second external diameter is greater than this first external diameter, this counter weight piece comprises that one first aligns mark, this trunnion shaft is provided with a trunnion shaft balancing weight for coaxial group, an and driven gear, driven gear is engaged in this actuation gear, this driven gear comprises that one second aligns mark, an and window, window is adjacent to this and second aligns mark and first align mark corresponding to this, and sees through this window and make this second align mark and be aligned in this and first align mark;

It is characterized in that:

This second aligns mark and is positioned at relatively a side away from this trunnion shaft balancing weight, this counter weight piece is ship anchor shape and comprises a crown portion, an and shank portion, shank portion is connected in this crown portion, and this first aligns mark and be positioned at this shank portion relatively away from a side of this crown portion.

2. the structure-improved that aligns according to claim 1 is characterized in that this shank portion axle is provided with a crankpin, and this crankpin comprises an end face, and this first aligns mark and be positioned at this end face.

3. the structure-improved that aligns according to claim 1 is characterized in that first to align mark be a straight line and draw and to be located on this counter weight piece for this.

4. the structure-improved that aligns according to claim 1 is characterized in that second to align mark be a straight line and draw and to be located on this driven gear for this.

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