KR19980064587U - Combined structure of automotive crankshaft and connecting rod - Google Patents

Abstract

The present invention prevents the connecting rod and the crank pin from being worn or damaged by friction through a ball bearing between the connecting rod and the crank pin, and also improves the combustion efficiency of the cylinder and the engine output. The present invention relates to a coupling structure of a crankshaft and a connecting rod for a crankshaft and a connecting rod, wherein any one of the balance weights 30, 42, 46, 54, 57, and ( 64, 67, 76 correspond to this balance weight 30, 46, 57, 67 by crank pins 34, 49, 63, 74 It is combined with the balance weights 42, 54, 64, 76 having a direction in which the balance weights 30, 46, 57, 67 and the balance weights 42, The connecting rod 90 is rotatably fixed by the ball bearing 85 to the crank pins 34, 49, 63, and 74 that engage the 54, 64 and 76. It is characterized by.

Description

Combined structure of automotive crankshaft and connecting rod

The present invention relates to a coupling structure of an automotive crankshaft and a connecting rod, and more particularly, to prevent the connecting rod and the crank pin from being worn or broken by friction through a ball bearing between the connecting rod and the crank pin. In addition, the present invention relates to a coupling structure of a crankshaft and a connecting rod for an automobile that can improve a combustion efficiency of a cylinder and an engine output.

Engines, which are the power generators of automobiles, mainly employ four-cycle water-cooled engines. Its schematic configuration shows that the engine body, which is the center of the engine, the crank mechanism for converting the reciprocating motion of the piston into the rotational motion of the crankshaft, the suction point and period of the mixer, and the discharge point and period of the combustion gas are controlled. It consists of a valve mechanism, a mixer formation mechanism which mixes fuel and air to form a mixer suitable for the engine operating conditions, and an accessory mechanism comprising an ignition device, a lubrication device, a cooling device, an exhaust device, and the like.

The engine body is composed of a cylinder block, a cylinder head, a crank case, an oil pan, a cylinder head cover, and the like as a central part of the engine. Inside the crankcase, a crankshaft is provided which converts the linear power of the piston obtained in the explosive stroke of each cylinder into a rotational movement through the connecting rod, and generates power continuously by moving the piston on the other stroke. One side of the crankshaft is equipped with a flywheel. This flywheel is an inertial wheel made of cast iron and is used to start the engine by engaging a pinion gear of a starting motor with a ring gear on its outer circumference.

The crankshaft transmits the rotational force generated by the combustion of the mixer at intervals, but the flywheel tries to rotate at a constant speed by inertia, so that the continuous rotational force can be obtained. On one side of the flywheel, a clutch disc for transmitting the rotational force of the flywheel to the clutch shaft is fixed.

1 is a perspective view showing the configuration of a crankshaft for a vehicle according to the prior art. Referring to Figure 1, the crankshaft 14 for generating a continuous power by converting the linear movement of the piston obtained in the explosion stroke to the rotational movement via the connecting rod is provided. The crankshaft 14 is connected to a crank journal 2 supported by bearings, and a crank pin which is connected to a distal end of the connecting rod with a planar split bearing interposed therebetween to receive the force of the piston or vice versa. Crank Pin (4), and Balance Weight (6) installed on the crank arm to maintain balance during rotation. Camshaft drive gear 8 and the crank pulley 10 is coupled to one side of the crankshaft 14, the flywheel 12 is installed on the other side.

Figure 2 is an exploded perspective view showing the configuration of a connecting rod for a vehicle according to the prior art. Referring to FIG. 2, a connecting rod 20 for connecting a piston (not shown) and the crankshaft 14 is provided, and the connecting rod 20 has a piston (not shown) at its upper end by a pin (not shown). It consists of an upper connecting rod 16 coupled to the lower connecting rod 17 fixed to the lower end of the upper connecting rod 16 by fixing means such as bolts and nuts. A pair of metal bearings 18 are provided between the upper connecting rod 16 and the lower connecting rod 17.

Figure 3 is an enlarged perspective view of the main portion showing a state in which the connecting rod according to the prior art is coupled to the crankshaft. Referring to FIG. 3, in the state where the upper connecting rod 16 and the lower connecting rod 17 are correspondingly positioned on the crank pin 4 of the crankshaft 14, the lower connecting part is fixed using a fixing means such as a bolt or a nut. The rod 17 is fixed to the lower end of the upper connecting rod 16. At this time, a pair of metal bearings 18 are interposed between the crank pin 4 and the connecting rod 20. In this way, the connecting rod 20 is fixed to the crank pin 4 of the crankshaft 14 so that the linear power of the piston obtained in the explosion stroke of each cylinder inside the crankcase is changed to the rotational motion and the crankshaft 14 Is delivered.

When combining the crankshaft and the connecting rod in the above manner, various problems were exposed.

First, when the connecting rod converts the linear movement of the piston to the rotational movement by the explosion stroke of each cylinder, the metal bearing moves in close contact with the crank pin of the connecting rod and the crankshaft. However, since the metal bearing interposed between the connecting rod and the crank pin has a large frictional resistance, oil has to be supplied from time to time. If oil is not supplied from time to time, unpleasant friction noise is generated due to friction. Friction often caused the connecting rod and crank pins or metal bearings to wear or break.

In addition, due to the frictional resistance of the metal bearing interposed between the connecting rod and the crank pin, the linear momentum of the piston and the rotational momentum of the crankshaft obtained in the explosion stroke of each cylinder are resisted, and the combustion efficiency of the cylinder is reduced, as well as the engine. There was a problem with the output falling.

Therefore, the present invention has been devised in view of the above problems, and its purpose is to prevent the connecting rod and the crank pin from being worn or broken by friction through a bowl bearing between the connecting rod and the crank pin. The present invention provides a coupling structure of an automotive crankshaft and a connecting rod that can improve the combustion efficiency of a cylinder and an engine output.

1 is a perspective view showing the configuration of a crankshaft for a vehicle according to the prior art

Figure 2 is an exploded perspective view showing the configuration of a connecting rod for a vehicle according to the prior art

Figure 3 is an enlarged perspective view of the main portion showing a state in which the connecting rod according to the prior art is coupled to the crankshaft

Figure 4 is an exploded perspective view showing a coupling structure of the crankshaft and connecting rod for a vehicle according to the present invention

5 is an exploded cross-sectional view showing a state in which the crankshaft and the connecting rod is coupled according to the present invention;

Figure 6 is a cross-sectional view showing a state in which the crankshaft and connecting rod for automobiles according to the present invention is coupled

♣ Explanation of symbols for main part of drawing ♣

30: first balance weight 36: input shaft

42: second balance weight 46: third balance weight

50: first assembly 54: fourth balance weight

57: fifth balance weight 60: second assembly

64: sixth balance weight 67: seventh balance weight

70: Third Assembly 76: 8th Balance Weight

78: output shaft 83: crankshaft

85: ball bearing 90: connecting rod

The object of the present invention is that in the coupling structure of the crankshaft and the connecting rod, any one of the balance weights is combined with a balance weight having a direction corresponding to the balance weight by a crank pin, and the balance weight and the balance weight are combined. It can be achieved by a coupling structure of the crankshaft and the connecting rod, characterized in that the connecting rod is rotatably fixed by the ball bearing to the engaging crank pin.

In addition, the present invention is the crankshaft is coupled to the camshaft drive gear and the crank pulley on one side, the first balance weight is fixed on the other side, the crank pin protruding on one side of the first balance weight, and the input shaft, A third balance weight having a direction corresponding to the first balance weight and having a fastening groove into which a fastening protrusion of the first balance weight is inserted at one side thereof having a direction opposite to the second balance weight by the crank journal; And a first assembly having a crank pin formed with a fastening protrusion on one side of the third balance weight, and having a direction corresponding to the third balance weight, and fastening of the third protrusion weight on one side thereof. The fifth balanced weight in which the grooved fourth balanced weight has a direction opposite to the fourth balanced weight by the crank journal And a second assembly having a fastening groove formed at one side of the fifth balance weight, and having a direction corresponding to the fifth balance weight, and having a fastening protrusion inserted into the fastening groove of the fifth balance weight at one side thereof. A third assembly in which the sixth weight of which the pin protrudes is connected to the seventh balance weight having a direction opposite to the sixth weight by the crank journal, and a third assembly having a fastening groove formed on one side of the seventh weight; An eighth balance weight having a direction corresponding to the balance weight and a crank pin formed with a fastening protrusion having a quadrangular shape inserted into and fixed to a fastening groove of the sixth balance weight is provided on one side, and on one side of the eighth balance weight. It is coupled to the output shaft to which the flywheel is installed.

Hereinafter, a preferred embodiment of the coupling structure of the automotive crankshaft and connecting rod according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is an exploded perspective view showing a coupling structure of the crankshaft and connecting rod for a vehicle according to the present invention, Figure 5 is an exploded cross-sectional view showing a state in which the crankshaft and connecting rod according to the present invention is coupled, Figure 6 is the present invention Sectional view showing a state in which the crankshaft and the connecting rod is coupled to the vehicle. 4 to 6, the crankshaft 83 has a camshaft driving gear (not shown) and a crank pulley (not shown) coupled to one side thereof, and a first balance weight 30 is fixed to the other side thereof. One side of the first balance weight 30 has an input shaft 36 protruding from the crank pin 34 formed with a fastening protrusion 32 having a rectangular shape, and has a direction corresponding to the first balance weight 30. The crank journal 44 has a second balance weight 42 having a fastening groove 40 having a square shape in which a fastening protrusion 32 having a square shape of the first balance weight 30 is inserted and fixed at one side thereof. The crank pin 49 is connected to the third balance weight 46 having a direction opposite to the two balance weights 42, and one side of the third balance weight 46 has a fastening protrusion 48 having a quadrangular shape. It has a direction corresponding to the protruding first assembly 50, and the third balance weight 46 The fourth balance weight 54 is formed by the crank journal 56 and the fourth balance weight 54 having a rectangular fastening groove 52 into which the fastening protrusion 48 having a quadrangular shape of the third balance weight 46 is inserted and fixed. A second assembly 60 connected to a fifth balance weight 57 having a direction opposite to the weight 54, and on one side of the fifth balance weight 57, a fastening groove 58 having a quadrangular shape; , Crank pins having a direction corresponding to the fifth balance weight 57 and a fastening protrusion 62 having a quadrangular shape inserted into and fixed to a fastening groove 58 having a quadrangular shape of the fifth balance weight 57 on one side thereof. A sixth balance weight 64 having a protruding portion 63 is connected to the seventh balance weight 67 having a direction opposite to the sixth balance weight 64 by the crank journal 66, and the seventh balance weight. The third assembly 70 and the seventh balance formed on one side of the 67 is formed with a fastening groove 68 having a rectangular shape The crank pin 74 is formed with a fastening protrusion 72 having a square shape inserted into the fastening groove 68 has a direction corresponding to the weight 67 and is inserted into a fastening groove 68 having a square shape of the sixth balance weight 67 on one side thereof. The eighth balance weight 76 is formed to protrude, and the output shaft 78 is provided with a flywheel (not shown) on one side of the eighth balance weight 76.

The upper end is connected to the piston (not shown) by a pin (not shown), the lower end is provided with a plurality of connecting rod 90, the ball bearing 85 is mounted in the longitudinal direction. The ball bearing 85 mounted at the lower end of each connecting rod 90 includes a crank pin 34 of the input shaft 36, a crank pin 49 of the first assembly 50, and a third assembly 70. Is inserted into and fixed to the crank pin 63 of the output shaft 78 and the crank pin 74 of the output shaft 78.

The crankshaft and the connecting rod configured as described above and the effects thereof will be described.

The camshaft driving gear (not shown) and the crank pulley (not shown) are coupled to one side of the input shaft 36. When a cam shaft driving gear (not shown) and a crank pulley (not shown) are coupled to one side of the input shaft 36, the crank pin 34 protruding from the first balance weight 30 of the input shaft 36 is provided. The connecting rod 90 is coupled to the crank pin 34 by moving the connecting rod 90 while the inner diameter of the bowl bearing 85 mounted on the connecting rod 90 is correspondingly positioned. When the connecting rod 90 is coupled to the crank pin 34, the outer circumferential surface of the crank pin 34 is in close contact with the bowl bearing 85 and at the same time, the fastening protrusion 32 having a quadrangular shape formed on one side of the crank pin 34. Protrudes to one side of the connecting rod 90 through the ball bearing (85). The upper end of the connecting rod 90 is fixed to the piston (not shown) by a pin (not shown). When the connecting rod 90 is coupled to the crank pin 34 of the input shaft 36, the fastening having a rectangular shape formed on the crank pin 34 of the first balance weight 30 protruding toward one side of the connecting rod 90. The first assembly 50 is moved by moving the first assembly 50 in a state in which the fastening groove 40 having a quadrangular shape formed in the second balance weight 42 of the first assembly 50 is correspondingly positioned on the protrusion 32. 50) to the input shaft 36. At this time, the fastening protrusion 32 protruding to the first balance weight 30 of the input shaft 36 is inserted and fixed in the fastening groove 40 of the second balance weight 42 of the first assembly 50.

When the second balance weight 42 of the first assembly 50 is coupled to the first balance weight 30 of the input shaft 36, the crank protrudes to the third balance weight 46 of the first assembly 50. The connecting rod 90 is coupled to the crank pin 49 by moving the connecting rod 90 in a state in which the inner diameter of the bowl bearing 85 mounted to the connecting rod 90 is corresponded to the pin 49. When the connecting rod 90 is coupled to the crank pin 49, the outer circumferential surface of the crank pin 49 is in close contact with the bowl bearing 85 and at the same time, the fastening protrusion 48 having a quadrangular shape formed on one side of the crank pin 49. Protrudes to one side of the connecting rod 90 through the ball bearing (85). The upper end of the connecting rod 90 is fixed to the piston (not shown) by a pin (not shown). When the connecting rod 90 is coupled to the crank pin 49 of the first assembly 50, the connecting rod 90 has a quadrangular shape formed on the crank pin 49 of the first assembly 50 protruding to one side of the connecting rod 90. The second assembly 60 is moved by moving the second assembly 60 in a state in which the fastening groove 48 having a quadrangular shape formed in the fourth balance weight 54 of the second assembly 60 is correspondingly positioned on the fastening protrusion 48. 60 is coupled to the first assembly 50. At this time, the fastening groove 48 protruding from the crank pin 49 of the first assembly 50 is inserted and fixed in the fastening groove 52 of the fourth balance weight 54 of the second assembly 60.

When the fourth balance weight 54 of the second assembly 60 is coupled to the third balance weight 46 of the first assembly 50, it protrudes to the sixth balance weight 64 of the third assembly 70. The connecting rod 90 is coupled to the crank pin 63 by moving the connecting rod 90 in a state in which the inner diameter of the bowl bearing 85 mounted on the connecting rod 90 is corresponded to the crank pin 63. . When the connecting rod 90 is coupled to the crank pin 63, the outer circumferential surface of the crank pin 63 is in close contact with the bowl bearing 85 and at the same time, the fastening protrusion 62 having a quadrangular shape formed on one side of the crank pin 63. Protrudes to one side of the connecting rod 90 through the ball bearing (85). The upper end of the connecting rod 90 is fixed to the piston (not shown) by a pin (not shown). When the connecting rod 90 is coupled to the crank pin 63 of the third assembly 70, the connecting rod 90 has a quadrangular shape formed on the crank pin 63 of the third assembly 70 protruding to one side of the connecting rod 90. The third assembly 70 is moved by moving the third assembly 70 in a state in which the fastening protrusion 62 is positioned to correspond to the fastening groove 58 having a quadrangular shape formed in the fifth balance weight 57 of the second assembly 60. 70 is coupled to the second assembly 60. At this time, the fastening groove 62 protruding from the crank pin 63 of the third assembly 70 is inserted and fixed in the fastening groove 50 formed in the fifth balance weight 57 of the second assembly 60.

When the sixth balance weight 64 of the third assembly 70 is coupled to the fifth balance weight 57 of the second assembly 60, the crank protrudes to the eighth balance weight 76 of the output shaft 78. The connecting rod 90 is coupled to the crank pin 74 by moving the connecting rod 90 in a state in which the inner diameter of the bowl bearing 85 mounted to the connecting rod 90 is corresponded to the pin 74. When the connecting rod 90 is coupled to the crank pin 74, the outer circumferential surface of the crank pin 74 is in close contact with the bowl bearing 85 and at the same time, the fastening protrusion 72 having a quadrangular shape formed on one side of the crank pin 74. Protrudes to one side of the connecting rod 90 through the ball bearing (85). The upper end of the connecting rod 90 is fixed to the piston (not shown) by a pin (not shown). When the connecting rod 90 is coupled to the crank pin 74 of the output shaft 78, the fastening protrusion having a quadrangular shape formed on the crank pin 74 of the output shaft 78 protruding toward one side of the connecting rod 90. The output shaft 78 is moved by moving the output shaft 78 while the 72 is positioned to correspond to the fastening groove 68 having a quadrangular shape formed in the seventh balance weight 67 of the third assembly 70. It is coupled to the third assembly 70. At this time, the fastening grooves 72 protruding from the crank pins 74 of the output shaft 78 are inserted and fixed in the fastening grooves 68 formed in the seventh balance weight 67 of the third assembly 70.

Input shaft 36 and first assembly 50, first assembly 50 and second assembly 60, second assembly 60 and third assembly 70, third assembly 70 and output shaft (78) is a combination of fastening protrusions (32), (48), (62), (72) having a rectangular shape and fastening grooves (40), (52), (58), (68) having a rectangular shape. Connected. Further, a crank pin 34 protruding from the first balance weight 30 of the input shaft 36, a crank pin 49 protruding from the third balance weight 46 of the first assembly 50, and The connecting rod 90 is connected to the crank pin 63 protruding from the sixth balance weight 64 of the three assembly 70 and the crank pin 74 protruding from the eighth balance weight 76 of the output shaft 78. The bowl bearing 85 mounted at the bottom of the insert is fixed.

Since the ball bearing 85 of the connecting rod 90 is fixed to each of the crank pins 34, 49, 63, and 74, it is not necessary to supply oil at any time, and unpleasant friction by friction Noise is not generated and the wear of the connecting rod 90 and the crank pins 34, 49, 63, and 74 by friction can be minimized. That is, in the related art, since a metal bearing is interposed between the connecting rod and the crank pin, unpleasant friction noise is generated when the oil is not supplied from time to time, and in the severe case, the connecting rod and the crank pin or the metal bearing are caused by friction. The wear and breakage often occurred. Also, due to the friction of the metal bearing between the connecting rod and the crank pin, the linear momentum of the piston and the rotational momentum of the crankshaft obtained in the explosion stroke of each cylinder were resisted. In addition, the combustion efficiency of the engine was reduced, as well as the output of the engine, but the coupling structure of the crankshaft and the connecting rod according to the present invention, the crankshaft 83, the input shaft 36 and the first assembly 50 and the second The assembly 60, the third assembly 70, and the output shaft 70, At the same time, the crank pin 34 connecting the input shaft 36 and the first assembly 50, the crank pin 49 connecting the first assembly 50 and the second assembly 60, and the second assembly ( Crank pin 63 connecting the 60 and the third assembly 70, and crank pin 74 connecting the third assembly 70 and the output shaft 78, the ball bearing 85 is mounted on the connecting rod Since the 90 is tightly fixed, the connecting rod 90 and the crank pins 34, 49, 63, and 74 can be prevented from being worn or broken, as well as combustion of the cylinder. It is possible to improve the efficiency and power of the engine.

As described above, the coupling structure of the crankshaft and the connecting rod for an automobile according to the present invention includes a crankshaft, an input shaft, and a third shaft, each of which can be assembled into an input shaft, a first assembly, a second assembly, a third assembly, and an output shaft. Close contact with the crank pin connecting the first assembly, the crank pin connecting the first assembly and the second assembly, the crank pin connecting the second assembly and the third assembly, and the crank pin connecting the third assembly and the output shaft. Fixed bearing has a connecting rod mounted at the bottom to prevent the connecting rod and the crank pin from being worn or broken by friction, as well as to improve the combustion efficiency of the cylinder and the output of the engine. will be.

Claims (3)

In the coupling structure of the crankshaft and the connecting rod, Any one of the balance weights 30, 42, 46, 54, 57, 64, 67, 76 is a crank pin 34, 49, 63 74 is coupled to the balance weights 42, 54, 64, 76 having directions corresponding to the balance weights 30, 46, 57, 67 by Crank pins 34, 49, which combine the balance weights 30, 46, 57, 67 with the balance weights 42, 54, 64, 76; A connecting structure of the crankshaft and the connecting rod, characterized in that the connecting rod (90) is rotatably fixed by the ball bearing (85) to (63) and (74). 2. The crankshaft (83) of claim 1 wherein Camshaft drive gear and crank pulley is coupled to one side, the first balance weight 30 is fixed to the other side, the crank pin 34 protruding on the one side of the first balance weight (30) )Wow, The crank journal has a second balance weight 42 having a direction corresponding to the first balance weight 30 and having a fastening groove 40 in which the fastening protrusion 32 of the first balance weight 30 is inserted and fixed. The crank pin 49 is connected to the third balance weight 46 having a direction opposite to the second balance weight 42 by the 44 and the fastening protrusion 48 is formed on one side of the third balance weight 46. ) Is a first assembly 50 protruding, The crank journal has a fourth balance weight 54 having a direction corresponding to the third balance weight 46 and having a fastening groove 52 in which the fastening protrusion 48 of the third balance weight 46 is inserted and fixed. A second assembly (56) connected to the fifth balance weight (57) having a direction opposite to the fourth balance weight (54), and having a fastening groove (58) formed at one side of the fifth balance weight (57). 60), A sixth crank pin 63 having a direction corresponding to the fifth balance weight 57 and protruding from the crank pin 63 formed with a fastening protrusion 62 inserted into and fixed to the fastening groove 58 of the fifth balance weight 57; The balance weight 64 is connected to the seventh balance weight 67 having a direction opposite to the sixth balance weight 64 by the crank journal 66, and has a fastening groove on one side of the seventh balance weight 67. A third assembly 70 in which 68 is formed, The crank pin 74 has a direction corresponding to the seventh balance weight 67 and a fastening protrusion 72 having a quadrangular shape that is inserted into and fixed to the fastening groove 68 of the sixth balance weight 67 on one side thereof. A coupling structure of a crankshaft and a connecting rod for an automobile, characterized in that the projecting eighth balance weight 76 is provided, and coupled to an output shaft 78 on which one flywheel is installed on one side of the eighth balance weight 76. . The method of claim 2, The input shaft 36 and the first assembly 50, the first assembly 50 and the second assembly 60, the second assembly 60 and the third assembly 70, the third assembly 70 and the output Coupling of the fastening protrusions 32, 48, 62, and 72 having a quadrangular shape with the fastening grooves 40, 52, 58, and 68 having a quadrangular shape. The coupling structure of the crankshaft and connecting rod for automobiles, characterized in that connected by.