CN217481352U - Eccentric shaft control system for gas distribution timing adjusting device of internal combustion engine - Google Patents

Abstract

The application discloses an eccentric shaft control system for an internal combustion engine gas distribution timing adjusting device, and relates to the technical field of internal combustion engine correlation. The eccentric shaft control system for the gas distribution timing adjusting device of the internal combustion engine comprises an engine body, wherein an eccentric shaft is mounted on the engine body; the connecting rod is provided with a rotating end and a free end, and the rotating end is rotationally connected with the output shaft; the swing rod is provided with a swing end and a connecting end, the swing end is rotatably connected with the free end, and the connecting rod and the swing rod are not collinear; the connecting end drives the eccentric shaft to rotate through the connecting shaft; the limiting device comprises a limiting part and a stopping part, one of the limiting part and the stopping part is arranged on the connecting shaft, the other one of the limiting part and the stopping part is arranged on the engine body, and the limiting device can limit the eccentric shaft to rotate in a reciprocating mode within a preset angle.

Description

Eccentric shaft control system for gas distribution timing adjusting device of internal combustion engine

Technical Field

The application relates to the technical field of internal combustion engine correlation, in particular to an eccentric shaft control system for a gas distribution timing adjusting device of an internal combustion engine.

Background

Existing internal combustion engines, in particular internal combustion engines for vehicles, have at least one camshaft. The camshaft cooperates with cam lobes of intake and exhaust valves of the engine cylinders to rotate the camshaft to open or close the valves. Under different working conditions, the engine has different requirements on the valve timing, and the valve can be opened under different working conditions by the valve timing adjusting device.

The distribution phase of the internal combustion engine has important influence on the dynamic property, the economical efficiency and the emission pollution. In order to meet the current increasingly strict index requirements, a variable valve timing technology is required to meet the valve timing requirements of the internal combustion engine under different loads, wherein the adjustment of the valve timing or lift is realized through an eccentric shaft control system, and the variable valve timing control method is one of the main means for realizing variable valve timing of the current internal combustion engine.

Therefore, higher requirements are put on the development of the eccentric shaft control system, and therefore the application provides a novel eccentric shaft control system of the internal combustion engine valve timing adjusting device.

SUMMERY OF THE UTILITY MODEL

The application provides an eccentric shaft control system for internal-combustion engine distribution timing adjusting device, variable demand that not only can satisfy distribution timing or lift can also guarantee that eccentric shaft control system's regulation and control is accurate, the security is high, the arrangement mode is nimble, drive moment is big, with low costs.

To achieve the above object, the present application provides an eccentric shaft control system for a valve timing adjustment apparatus of an internal combustion engine, comprising:

an engine body;

an eccentric shaft mounted on the engine body;

a cylinder having an output shaft;

the connecting rod is provided with a rotating end and a free end, and the rotating end is rotationally connected with the output shaft;

the swing rod is provided with a swing end and a connecting end, the swing end is rotatably connected with the free end, and the connecting rod and the swing rod are not collinear;

the connecting end drives the eccentric shaft to rotate through the connecting shaft;

and the limiting device comprises a limiting piece and a stop piece, one of the limiting piece and the stop piece is arranged on the connecting shaft, the other one of the limiting piece and the stop piece is arranged on the engine body, and the limiting device can limit the eccentric shaft to rotate in a reciprocating manner within a preset angle.

In some embodiments of the present application, the limiting member is an arc-shaped limiting groove, the stopping member is an arc-shaped stopping member, and the arc-shaped limiting groove and the arc-shaped stopping member are concentrically arranged.

In some embodiments of this application, the connecting axle includes first shaft segment, second shaft segment and third shaft segment that the diameter increases progressively in proper order, the link with first shaft segment fixed connection, the arc spacing groove sets up on the third shaft segment.

In some embodiments of the present application, the arc-shaped limiting groove is located on an end surface of the third shaft segment facing away from the first shaft segment and penetrates through a peripheral wall of the third shaft segment, and a radial inner side of the arc-shaped stop member and a radial inner side of the arc-shaped limiting groove are not in contact.

In some embodiments of the present application, the connecting end is keyed to the first shaft segment.

In some embodiments of the present application, the eccentric shaft control system for a valve timing adjustment apparatus of an internal combustion engine further comprises:

the connecting piece has a stiff end and a pin joint end, the stiff end with output shaft fixed connection, the pin joint end with it rotates to rotate the end and connects, the length of connecting piece can be adjusted on its extending direction.

In some embodiments of the present application, the pivot end is a U-shaped pivot end, the U-shaped pivot end has a first side plate, a second side plate, and a bottom plate connecting the first side plate and the second side plate, and the rotation end is located between the first side plate and the second side plate and is pivoted to the first side plate and the second side plate.

In some embodiments of the present application, the eccentric shaft control system for a valve timing adjustment apparatus of an internal combustion engine further comprises:

the first pin is pivoted with the first side plate, the second side plate and the rotating end, and the head of the first pin is abutted against the first side plate or the second side plate;

the first check ring is sleeved on the rod part of the first pin;

the second pin is pivoted with the swinging end and the free end, and the head of the second pin is abutted against the swinging end or the free end;

and the second check ring is sleeved on the rod part of the second pin.

In some embodiments of the present application, the arc stopper is an arc stopper piece fixed on a side plate of the engine body.

In some embodiments of the present application, the eccentric shaft control system for a valve timing adjusting apparatus of an internal combustion engine further comprises:

the support is installed on a cover plate of the engine body, and the air cylinder is fixedly installed on the support.

The eccentric shaft control system for the gas distribution timing adjusting device of the internal combustion engine ensures that the eccentric shaft rotates in a reciprocating mode within a preset angle through the limiting device, and therefore the safety of the eccentric shaft control system is improved. Simultaneously, because the eccentric shaft in this application drives connecting rod, pendulum rod, connecting axle indirect drive in proper order through the cylinder, and the arrangement of connecting rod and pendulum rod is more nimble, consequently makes above-mentioned eccentric shaft control system's arrangement nimble, can also increase the drive moment of above-mentioned cylinder through increasing the length of connecting rod and/or pendulum rod. In addition, the connecting rod and the oscillating bar are easy and convenient to obtain, and the cost is low, so that the cost of the eccentric shaft control system can be reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic configuration diagram of an eccentric shaft control system for a valve timing adjusting apparatus of an internal combustion engine in the practice of the present application;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic diagram of an eccentric shaft control system for a valve timing adjustment apparatus of an internal combustion engine according to an embodiment of the present disclosure, with an engine body removed;

FIG. 4 is a schematic structural view of a connecting shaft in the practice of the present application;

FIG. 5 is a schematic structural view of a connecting shaft and an arc-shaped stopping sheet in the application;

FIG. 6 is a schematic diagram of an eccentric shaft in the practice of the present application;

fig. 7 is a schematic diagram of the structure of an eccentric shaft control system in the practice of the present application.

The main reference numbers in the drawings accompanying the present specification are as follows:

1-an engine body; 101-side plate; 102-a cover plate; 2-eccentric shaft; 3-a cylinder; 4-a connecting rod; 41-a rotating end; 42-free end; 5-oscillating bar; 51-a swing end; 52-a connection end; 6-connecting shaft; 61-a first shaft section; 611-flat bond; 62-a second shaft section; 63-a third shaft section; 7-a limiting device; 71-arc limiting groove; 711-a first stop face; 712-a second stop surface; 72-arc stop piece; 721-a first stop surface; 722-a second stop surface; 8-a connector; 81-a first side panel; 82-a second side panel; 83-a bottom plate; 9-a first pin; 11-a scaffold; 12-mounting seat.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The present application provides an eccentric shaft control system for a valve timing adjusting apparatus of an internal combustion engine, which will be described in detail below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments of the present application. In the following embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to related descriptions of other embodiments for parts that are not described in detail in a certain embodiment.

Referring to fig. 1 and 2, the eccentric shaft control system for a valve timing adjusting device of an internal combustion engine provided by the present application comprises an engine body 1, an eccentric shaft 2, a cylinder 3, a connecting rod 4, a swing rod 5, a connecting shaft 6 and a limiting device 7 (the reference number refers to fig. 3), wherein the eccentric shaft 2 is mounted on the engine body 1; the cylinder 3 has an output shaft; the connecting rod 4 is provided with a rotating end 41 and a free end 42, and the rotating end 41 is rotationally connected with the output shaft; the swing rod 5 is provided with a swing end 51 and a connecting end 52, the swing end 51 is rotatably connected with the free end 42, and the connecting rod 4 and the swing rod 5 are not collinear; the connecting end 52 drives the eccentric shaft 2 to rotate through the connecting shaft 6; the limiting device 7 comprises a limiting part and a stopping part, one of the limiting part and the stopping part is arranged on the connecting shaft 6, the other one of the limiting part and the stopping part is arranged on the engine body 1, and the limiting device can limit the eccentric shaft 2 to rotate in a reciprocating mode within a preset angle.

The eccentric shaft control system for the internal combustion engine gas distribution timing adjusting device ensures that the eccentric shaft 2 rotates in a reciprocating mode within a preset angle through the limiting device 7, and therefore the safety of the eccentric shaft control system is improved. Meanwhile, the eccentric shaft 2 in the application drives the connecting rod 4, the oscillating bar 5 and the connecting shaft 6 to indirectly drive through the cylinder 3, and the arrangement modes of the connecting rod 4 and the oscillating bar 5 are flexible, so that the arrangement mode of the eccentric shaft control system is flexible, and the driving torque of the cylinder 3 can be increased by increasing the length of the connecting rod 4 and/or the oscillating bar 5. In addition, the connecting rod 4 and the oscillating bar 5 are easy and convenient to obtain and low in cost, so that the cost of the eccentric shaft control system can be reduced.

Referring to fig. 3 and 4, the limiting member is an arc-shaped limiting groove 71, the stopping member is an arc-shaped stopping member, and the arc-shaped limiting groove 71 and the arc-shaped stopping member are concentrically arranged, so that the structures of the limiting member and the stopping member are simple and easy to implement.

Illustratively, the arc-shaped limiting groove 71 is arranged on the connecting shaft 6, and the arc-shaped stop piece is fixed on the engine body 1.

In another embodiment, the limiting member includes a first limiting portion and a second limiting portion, the limiting member includes a first stopping portion and a second stopping portion, when the eccentric shaft does not rotate, the first stopping portion abuts against the first limiting portion, and the second stopping portion abuts against the second limiting portion.

For example, the first limiting portion and the second limiting portion are two limiting protrusions which are arranged on the end surface of the connecting shaft 6 and protrude towards the stop member, and the first stopping portion and the second stopping portion are two stopping protrusions which are arranged on the engine body 1 and protrude towards the connecting shaft 6.

Or, first spacing portion and second spacing portion are for setting up on engine organism 1, and towards two convex spacing archs of connecting axle 6, first backstop portion with second backstop portion is for setting up at the terminal surface of connecting axle 6, and towards two convex backstop archs of backstop part.

It will be appreciated that the stop projection and the limit projection project in opposite directions.

It should be noted that the preset angle ranges from 0 ° to 180 °. For example, the preset angle is any one of 20 °, 22 °, 25 °, 30 °, 35 °, 40 °, 45 °, 50 °, 60 °, 70 °, 75 °, 80 °, 85 °, 90 °, 100 °, 120 °, 150 °, 160 °, 170 °, or 180 °. Of course, the range of the preset angle may be some angles not listed above, as long as the preset angle is ensured to be in the range of 0 ° to 180 °. Wherein the rotation axes of the arc-shaped limiting groove 71 and the arc-shaped stop piece and the rotation axis of the eccentric shaft 2 are the same axis.

With continued reference to fig. 2 and 4, the connecting shaft 6 includes a first shaft segment 61, a second shaft segment 62 and a third shaft segment 63 with sequentially increasing diameters, the connecting end 51 of the swing link 5 is fixedly connected with the first shaft segment 61, and the arc-shaped limiting groove 71 is disposed on the third shaft segment 63. On the one hand, the rocker 5 can be axially positioned by means of a step surface formed between the second shaft section 62 and the first shaft section 61. On the other hand, the second shaft section 62 can also separate the swing rod 5 from the third shaft section 63, so that the contact area between the swing rod 5 and the connecting shaft 6 is reduced, and further the abrasion between the swing rod 5 and the connecting shaft 6 is reduced. In the third aspect, the weight of the connecting shaft 6 can be reduced through the arrangement, the structure is more compact, the energy consumption required in the transmission process is reduced, and the friction power consumption is further reduced.

Wherein, the arc-shaped limiting groove 71 is arranged on the third shaft section 63, and because the diameter of the third shaft section 63 is the largest, the arc-shaped limiting groove 71 is more easily manufactured on the third shaft section 63, and the contact area between the arc-shaped limiting groove 71 and the arc-shaped stop part can be ensured to be larger, so that the limitation between the arc-shaped limiting groove 71 and the arc-shaped stop part is ensured to be more reliable.

With continued reference to fig. 4, the arc-shaped limiting groove 71 is located on an end surface of the third shaft segment 63 facing away from the first shaft segment 61 and penetrates through a peripheral wall of the third shaft segment 63 (i.e., an outer wall surface of the third shaft segment 63 in the circumferential direction), and a radially inner side of the arc-shaped stopper and a radially inner side of the arc-shaped limiting groove 71 are not in contact. Compared with the technical scheme that an arc-shaped limiting groove is formed in the end face, away from the first shaft section 61, of the third shaft section 63, and the arc-shaped limiting groove 71 is located on the radial inner side of the third shaft section 63 on the cross section of the third shaft section 63, the technical scheme of the third shaft section can avoid friction between the arc-shaped limiting part and the arc-shaped limiting groove 71, namely friction force between all parts in the limiting device 7 is reduced, so that energy consumption and friction power consumption required in the transmission process are reduced, and transmission efficiency of the cylinder 3 is improved. Meanwhile, the phenomenon that the connecting shaft 6 is jammed in the rotating process can be avoided, and the limiting device 7 is safe and reliable in the rotating process.

Referring to fig. 5, the arc-shaped limiting groove 71 has a first limiting surface 711 and a second limiting surface 712, the arc-shaped stopping piece 72 has a first stopping surface 721 and a second stopping surface 722, the first limiting surface 711 abuts against the first stopping surface 721 to limit the maximum rotation angle of the arc-shaped stopping piece 72 in the counterclockwise direction, and the second limiting surface 712 abuts against the second stopping surface 722 to limit the maximum rotation angle of the arc-shaped stopping piece 72 in the clockwise direction.

The rotation angle of the connecting shaft 6 is the central angle corresponding to the arc-shaped limiting groove 71 minus the central angle corresponding to the arc-shaped stopping piece 72.

Based on the above embodiment, the connecting end 52 of the swing rod 5 is connected with the first shaft section 61 in a key manner, so that the reliable connection between the swing rod 5 and the first shaft section 61 is ensured, and the disassembly and the assembly are simple and convenient.

Referring to fig. 2 and 4, a key groove is formed on the first shaft section 61, and the opening direction of the key groove is consistent with the axial direction of the first shaft section 61, and a flat key 611 is arranged in the key groove. The connecting end 52 of the swing link 5 is formed with an avoiding groove corresponding to the flat key 611. Therefore, when the connecting end 52 of the swing rod 5 is connected with the first shaft section 61, the connecting end 52 is sleeved on the first shaft section 61 from the end of the first shaft section 61 departing from the third shaft section 63 only after the positions of the avoiding groove and the flat key 611 on the connecting end 52 in the swing rod 5 are aligned.

Of course, the swing rod 5 and the first shaft section 61 may be fixed by clamping, screwing, welding, or other connection methods. Alternatively, the swing link 5 and the first shaft section 61 may be of an integral structure.

It should be noted that the eccentric shaft 2 has a crank pin 21 and an end 22, and the third shaft section 63 of the connecting shaft 6 is coaxially and fixedly connected with the end 22 of the eccentric shaft to drive the eccentric shaft 2 to rotate synchronously, as shown in fig. 4 and 6. For example, the third shaft section 63 of the connecting shaft 6 and the end 22 of the eccentric shaft 2 may be fixedly connected by welding, screwing or clamping, as long as the coaxial fixation of the two is ensured.

With continued reference to fig. 1 and 2, the eccentric shaft control system further includes a connecting member 8, the connecting member 8 has a fixed end fixedly connected to the output shaft and a pivoted end rotatably connected to the rotating end 41, the length of the connecting member 8 can be adjusted in the extending direction thereof, the distance between the cylinder 3 and the eccentric shaft 2 is increased by adding the connecting member 8, so as to increase the driving torque of the cylinder 3, and the driving torque of the cylinder 3 can be adjusted by adjusting the length of the connecting member 8.

In addition, because directly be general with cylinder 3, if need rotate the output shaft of cylinder 3 and the rotation end 41 of connecting rod 4 and be connected, just need customize cylinder 3 specially, however, this application just need not to customize cylinder 3 specially through setting up connecting piece 8, guarantees above-mentioned eccentric shaft control system's cost is lower.

In order to guarantee that the rotation between the rotation end 41 of connecting rod 4 and the connecting piece 8 is connected more firmly reliably, and the rotation end 41 of connecting rod 4 is difficult to take place the bite at the rotation in-process, the pin joint end of connecting piece 8 is U type pin joint end in this application, U type pin joint end has first curb plate 81, second curb plate 82 and connects first curb plate 81 with a bottom plate 83 of second curb plate 82, rotation end 41 is located first curb plate 81 with between the second curb plate 82 and with first curb plate 81 with the pin joint of second curb plate 82, as shown in fig. 2.

The length of the connecting member 8 can be adjusted in the extending direction thereof. This can be achieved by making the connecting element 2 a telescopic connecting rod. Alternatively, the connecting member 8 may include a plurality of connecting rods having different lengths, and in particular, the operator may select one of the plurality of connecting rods having different lengths as desired.

Referring to fig. 7, the eccentric shaft control system further includes a first pin 9, a first retainer ring, a second pin 10, and a second retainer ring, the first pin 9 is pivotally connected to the first side plate 81, the second side plate 82, and the rotating end 41, and a head of the first pin 9 abuts against the first side plate 81 or the second side plate 82; the first retainer ring is sleeved on the rod part of the first pin 9 to prevent the first pin 9 from falling off; the second pin 10 is pivoted with the swinging end 51 and the free end 42, and the head of the second pin 10 abuts against the swinging end 51 or the free end 42; the second stopper is sleeved on the rod part of the second pin 10 to prevent the second pin 10 from falling off.

Therefore, the pivoting between the connecting piece 8 and the rotating end 41 of the connecting rod 4 and the pivoting between the free end 42 of the connecting rod 4 and the swinging end 51 of the swinging rod 5 can be realized through the first pin 9, the first retainer ring, the second pin 10 and the second retainer ring, the acquisition of the components is more convenient, and the cost is lower, so that the pivoting between the connecting piece 8 and the rotating end 41 of the connecting rod 4 and the pivoting structure between the free end 42 of the connecting rod 4 and the swinging end 51 of the swinging rod 5 are simpler and more convenient.

Alternatively, the pivot function may be realized by two bolts, that is, the rod portion of one bolt is rotatably connected to the connecting member 8 and the rotating end 41 of the connecting rod 4, and the rod portion of the other bolt is rotatably connected to the free end 42 of the connecting rod 4 and the swinging end 51 of the swinging rod 5.

With continued reference to fig. 7, the arc-shaped stop piece is the arc-shaped stop piece 72, the arc-shaped stop piece 72 is fixed on the side plate 101 of the engine body 1, and the arc-shaped stop piece 72 is directly fixed by the side plate 101 of the engine body 1, so that the arc-shaped stop piece 72 can be fixed without arranging other parts.

Also, the structure of the arcuate stopper piece 72 is simpler and easier to implement.

With continued reference to fig. 3, the above-mentioned eccentric shaft control system further includes a bracket 11, the bracket 11 is mounted on a cover plate 102 (with reference to fig. 1) of the engine body 1, and the cylinder 3 is fixedly mounted on the bracket 11, so as to realize fixing and mounting of the cylinder 3.

It should be noted that the bracket 11 includes a connecting plate, a mounting plate and a fixing plate, the connecting plate and the cover plate 102 are arranged in parallel and fixedly mounted on the cover plate 102, the mounting plate is arranged obliquely and is consistent with the moving direction of the output shaft of the cylinder 3, the connecting plate, the mounting plate and the fixing plate form an approximately triangular frame structure in a surrounding manner, and the connecting plate and the fixing plate are arranged vertically. Therefore, on the basis of ensuring that the structure of the bracket 11 is relatively stable, the movement of the connecting rod 4 and the swing rod 5 driven by the cylinder 3 is relatively simple, and the rotation of the connecting shaft 6 is more easily controlled.

With continued reference to fig. 3 and 7, the eccentric shaft control system further includes a mounting seat 12, the mounting seat 12 is mounted on the mounting plate of the bracket 11, and the cylinder 3 is fixedly mounted on the mounting plate of the bracket 11 through the mounting seat, so as to fix and mount the cylinder 3.

Wherein, the mounting plate and the mounting base 12 are fastened and connected by a thread structure.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims. In addition, the principle and the implementation of the present application are illustrated by applying specific examples in the specification, the above description of the embodiments is only for assisting understanding of the method and the core idea of the present application, and the content of the present application should not be construed as limiting the present application.

Claims (10)

1. An eccentric shaft control system for a valve timing adjusting apparatus of an internal combustion engine, characterized by comprising:

an engine body (1);

an eccentric shaft (2) mounted on the engine body (1);

a cylinder (3) having an output shaft;

a connecting rod (4) having a rotating end (41) and a free end (42), said rotating end (41) being in rotational connection with said output shaft;

the swing rod (5) is provided with a swing end (51) and a connecting end (52), the swing end (51) is rotatably connected with the free end (42), and the connecting rod (4) and the swing rod (5) are not collinear;

the connecting end (52) drives the eccentric shaft (2) to rotate through the connecting shaft (6);

and the limiting device (7) comprises a limiting part and a stopping part, one of the limiting part and the stopping part is arranged on the connecting shaft (6), the other one of the limiting part and the stopping part is arranged on the engine body (1), and the limiting device can limit the eccentric shaft (2) to rotate in a reciprocating mode within a preset angle.

2. The eccentric shaft control system for a valve timing adjusting apparatus of an internal combustion engine according to claim 1, characterized in that the limiting member is an arc-shaped limiting groove (71), the stopping member is an arc-shaped stopping member, and the arc-shaped limiting groove (71) and the arc-shaped stopping member are concentrically arranged.

3. The eccentric shaft control system for a valve timing adjusting apparatus of an internal combustion engine according to claim 2, characterized in that the connecting shaft (6) includes a first shaft section (61), a second shaft section (62), and a third shaft section (63) having successively increasing diameters, the connecting end (52) is fixedly connected to the first shaft section (61), and the arc-shaped restriction groove (71) is provided on the third shaft section (63).

4. The eccentric shaft control system for a valve timing adjusting apparatus of an internal combustion engine according to claim 3, characterized in that the arc-shaped stopper groove (71) is located on an end surface of the third shaft section (63) facing away from the first shaft section (61) and penetrates a peripheral wall of the third shaft section (63), and a radially inner side of the arc-shaped stopper groove (71) are not in contact.

5. The eccentric shaft control system for a valve timing adjusting apparatus of an internal combustion engine according to claim 3, characterized in that the connecting end (52) and the first shaft section (61) are keyed.

6. The eccentric shaft control system for a valve timing adjusting apparatus of an internal combustion engine according to claim 1, characterized by further comprising:

connecting piece (8), have a stiff end and a pin joint end, the stiff end with output shaft fixed connection, the pin joint end with it rotates to rotate end (41) and connects, the length of connecting piece (8) can be adjusted on its extending direction.

7. The eccentric shaft control system for a valve timing adjusting apparatus of an internal combustion engine according to claim 6, characterized in that the pivot end is a U-shaped pivot end having a first side plate (81), a second side plate (82), and a bottom plate (83) connecting the first side plate (81) and the second side plate (82), and the rotating end (41) is located between the first side plate (81) and the second side plate (82) and is pivoted to the first side plate (81) and the second side plate (82).

8. The eccentric shaft control system for a valve timing adjusting apparatus of an internal combustion engine according to claim 7, characterized by further comprising:

a first pin (9) pivotally connected to the first side plate (81), the second side plate (82) and the rotating end (41), wherein the head of the first pin (9) abuts against the first side plate (81) or the second side plate (82);

the first check ring is sleeved on the rod part of the first pin (9);

a second pin (10) pivotally connecting the swing end (51) and the free end (42), wherein the head of the second pin (10) abuts against the swing end (51) or the free end (42);

and the second check ring is sleeved on the rod part of the second pin (10).

9. The eccentric shaft control system for a valve timing adjusting apparatus of an internal combustion engine according to claim 2, characterized in that the arc-shaped stopper is an arc-shaped stopper piece (72), and the arc-shaped stopper piece (72) is fixed to a side plate (101) of the engine body (1).

10. The eccentric shaft control system for a valve timing adjusting apparatus of an internal combustion engine according to claim 1, characterized by further comprising:

the support (11) is installed on a cover plate (102) of the engine body (1), and the cylinder (3) is fixedly installed on the support (11).

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