JPH04127817U - Internal combustion engine lubricating oil supply system - Google Patents

Abstract

(57) [Summary] [Purpose] To supply sufficient lubricating oil to the pin side bearing 6 without going through the crankshaft 1. [Structure] Each groove 11a provided on one side 5b of the large end 5a of the connecting rod 5 and the opposing surface 1 of the crank arm 1c.
The lubricating oil supply device includes grooves 11b provided on the other side of the large end 5a, grooves 12b provided on the opposing surface 1f of the crank arm 1d, and the like.
Lubricating oil is dripped onto the periphery of the one side surface 5b and the opposing surface 1e from an oil drip hole formed in the cylinder block.
The dropped lubricating oil is guided toward the pin-side bearing 6 through the grooves 11a and 11b, which rotate relative to each other and intersect continuously. After lubricating the bearing 6, this lubricating oil is applied to the periphery of the other side surface and the opposing surface 1f through the grooves on the other side surface and the grooves 12b on the opposing surface 1f, which rotate relatively and intersect continuously. be guided.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a lubricating oil supply device for an internal combustion engine, and in particular to a crank pin and a connector. A reciprocating internal combustion engine that supplies lubricating oil to the bearing connected to the cutting rod. Related to gin's lubricating oil supply device.

0002

[Conventional technology]

In a reciprocating internal combustion engine, the pistons installed in each cylinder are connected to each other. Connecting rods (hereinafter referred to as connecting rods) to the crankshaft. , converts the reciprocating motion of each piston into rotation of the crankshaft. Each crank journal of the crankshaft is connected in series through the main bearing. They are each rotatably supported by the holder blocks. Also, the big end of each connecting rod The relative rotation of each crank pin of the crankshaft is through the pin side bearing. They are freely connected to each other. As main bearing and pin side bearing For example, if a rolling bearing such as a roller bearing is used, the rotation of the crankshaft will be reduced. rolling resistance can be reduced.

0003

[Problem that the idea aims to solve]

By the way, each pin side bearing is connected to an oil passage provided in the crankshaft. and supplies lubricating oil. This oil passage has a main hole in the cylinder block. Lubricating oil is pumped through each main bearing. Therefore, when using roller bearings as each main bearing, Some of the lubricating oil flowing into the oil passage from the main hole enters the gap between the roller bearings. There is a problem that lubricating oil leaks and it is difficult to supply sufficient lubricating oil to each pin side bearing.

0004 This invention was made to solve the above-mentioned problems, and the crankshaft Internal combustion engine that can supply lubricating oil to the pin side bearing without going through the This invention relates to a lubricating oil supply device.

[0005]

[Means to solve the problem]

According to the present invention, in order to achieve the above purpose, Crank pin and connecting rod of crankshaft in internal combustion engine In the lubricating oil supply device that supplies lubricating oil to the bearing interposed between the large end of the hand, a first side of the big end and a first side of the crank arm opposite thereto that are in sliding contact with each other; Provided on at least one sliding surface of the pair of sliding surfaces, when the crankshaft rotates. When the large end and the crank arm rotate relative to each other while sliding, the first sliding contact occurs. a first groove group that guides lubricating oil on the peripheral edge of the pair of faces toward the bearing side; a second side of the other side of the big end and a second side of the crank arm opposite thereto that slides into contact with each other; Provided on at least one sliding surface of the pair of sliding surfaces, when the crankshaft rotates. When the large end and the crank arm rotate relative to each other while sliding, the bearing side a second group of grooves that guide the lubricating oil toward the periphery of the second pair of sliding surfaces. It is something.

[0006]

[Effect]

When the crankshaft rotates, the large end of the connecting rod and the corresponding large end The crank arms located on both sides of the crank rotate relative to each other while sliding. This results in The first groove group provided in the first pair of sliding surfaces on one side of the large end is arranged around the first pair of sliding surfaces. The rim lubricant is directed towards a bearing interposed between the big end and the crankpin. Also, The second group of grooves provided in the second pair of sliding surfaces on the other side of the large end is configured to conduct lubricating oil on the bearing side. It is guided toward the periphery of the sliding surface pair No. 2. Therefore, the moisture attached to the periphery of the first pair of sliding surfaces Lubricating oil circulates from one side of the big end through the bearing to the other side.

[0007]

【Example】

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings. Figure 1 shows a lubricating oil supply system for an internal combustion engine to which the present invention is applied. A pin interposed between the crank pin 1a of the shaft 1 and the connecting rod 5 A lubricating oil supply device that supplies lubricating oil to the side bearing 6 includes first and second groove groups 11. , 12, lubricating oil dripping means 13 (FIG. 2), etc.

[0008] Each crank journal 1b of the crankshaft 1 has a roller bearing (not shown). They are each rotatably supported by the cylinder block 7 (Fig. 2) via the Ru. The cylinder block 7 is filled with lubricating oil that lubricates the engine's valve mechanism, etc. An oil drop hole 7a is provided for circulating oil into a pan (both not shown). In addition, as shown in FIG. 3, each crank pin 1a of the crankshaft 1 (1 in the figure) Connecting rod (hereinafter simply referred to as connecting rod) 5 is attached to the connecting rod (only parts shown). The large end 5a is a pin-side beary composed of an outer race 6a, a roller 6b, etc. They are connected to each other through rings 6 so as to be relatively rotatable.

[0009] Each crank arm 1c, 1d supporting both ends of this crank pin 1a is a controller. They are in contact with both sides of the large end 5a of the rod 5, and the engine starts and cranks. First and second sliding contacts that rotate relative to each other while sliding when the shaft 1 rotates A pair of surfaces 15 and 16 are formed. That is, one side 5b of the large end 5a and sliding contact therewith. The first sliding surface pair 15 is connected to the opposing surface 1e of the crank arm 1c, and the large end 5a is A second sliding contact is made between the other side surface 5c and the opposing surface 1f of the crank arm 1d that is in sliding contact with the other side surface 5c. They each constitute a pair of faces 16.

0010 In addition, inside this crankshaft 1, there is a part formed in a conventional crankshaft. The original oil passage has been omitted. As shown in FIG. 1, the first groove group 11 of the lubricating oil supply device has a first sliding surface pair 15. It is set in. To be more specific, the first groove group 11 has a large groove constituting the pair of sliding surfaces 15. A plurality of grooves 11a provided on one side 5b of the end portion 5a and a pair of crank arms 1c It is composed of a plurality of grooves 11b provided on the facing surface 1e. Each of these grooves 11a , 11b are arranged radially, as shown in FIG. Each groove 11a, 11b Each is curved, moving from the outside to the inside along the rotation direction (direction of arrow C in the figure). It is extending.

[0011] One side 5b of the big end 5a and the opposing surface 1e of the crank arm 1c face each other. Therefore, each groove 11a on one side 5b and each groove 11b on the opposing surface 1e intersect with each other. Extends in the direction of FIG. 5 shows the concept of the positional relationship between the grooves 11a and 11b. Each groove 1 Lubricating oil is dripped onto the upper side of 1a and 11b in the figure, and as shown by the arrow in the figure, each groove 11 When a and 11b move outward, the lubricating oil on the upper side is guided to the lower side. follow Then, the crankshaft 1 rotates, and the big end 5a and the crank arm 1c become relative to each other. When rotating, each groove 11a on one side 5b of the large end 5a and the crank arm 1c The grooves 11b of the facing surface 1e intersect with each other one after another, and while overcoming the centrifugal force, the first The lubricating oil adhering to the periphery of the pair of sliding surfaces 15 is guided toward the pin side bearing 6.

0012 Note that the shape of each groove 11a, 11b is limited to the shape shown in FIG. isn't it. For example, as shown in FIG. 6, each straight groove 11a', 11b' is It may be extended from the outside to the inside along the direction of rotation (direction of arrow C in the figure). That is, one after another The lubricating oil can be guided from the periphery of the pair of sliding surfaces to the bearing side by intersecting the Any shape is fine.

[0013] The second groove group 12 of the lubricating oil supply device is provided on the second pair of sliding surfaces 16. To be more specific, the second groove group 12 is formed on the other side surface 5 of the large end portion 5a constituting the pair of sliding surfaces 16. a plurality of grooves 12a provided in c, and a plurality of grooves 12a provided in the opposing surface 1f of the crank arm 1d. It is composed of a plurality of grooves 12b. Each of these grooves 12a, 12b is shown in FIG. As shown, they are arranged radially. Each groove 12a, 12b is curved. It extends from the inside to the outside along the rotation direction (arrow CC direction in the figure). That is, , each groove 12a, 12b of the second groove group 12, and each groove 11a, 11 of the first groove group 11. b extends in the opposite direction with respect to the rotation direction.

[0014] The other side surface 5c of the big end 5a and the opposing surface 1f of the crank arm 1d face each other. Therefore, each groove 12a on the other side surface 5c and each groove 12b on the opposing surface 1f intersect with each other. Extends in the direction of FIG. 8 shows the concept of the positional relationship between the grooves 12a and 12b. Arrow in figure As each groove 12a, 12b moves outward, as shown by the marks, the lower lubrication Oil is led to the top. Therefore, the crankshaft 1 rotates and the big end 5a and the crank When the cross arm 1d rotates relatively, each groove 1 on the other side surface 5c of the large end 5a 2a and each groove 12b on the opposing surface 1f of the crank arm 1c intersect one after another, and the pin side The lubricating oil that has lubricated the bearing 6 is guided to the peripheral edge side of the second pair of sliding surfaces 16.

[0015] In addition, as in the case of each groove 11a, 11b, the shape of each groove 12a, 12b The shapes are not limited to those shown in Figure 7, but can be intersected one after another to provide lubrication. Any shape is acceptable as long as it guides oil from the bearing side to the periphery of the pair of sliding surfaces. Further, the depth of each groove 11a, 11b, 12a, 12b is, for example, from 0.3 mm to It is desirable to set it within a range of 1 mm.

[0016] The lubricating oil dripping means 13 is, for example, an oil dripping means drilled in the cylinder block 7. It consists of holes (Figure 2). Oil dripping hole (hereinafter referred to as oil dripping hole) as lubricating oil dripping means 13 The oil drop hole 13) is located diagonally downward from a position near the lower end of the oil drop hole 7a. It is being drilled towards. The connecting rod 5 rotates at the lower end of the oil drip hole 13. and an opening at a position where lubricating oil can be dripped onto the periphery of the first pair of sliding surfaces 15. There is.

[0017] The action will be explained below. When the engine is started and crankshaft 1 rotates, the lubrication inside the oil pan The oil lubricates the inside of the engine and returns to the oil pan through the oil drop hole 7a. At this time , a part of the lubricating oil flows into the oil drip hole 13 from the oil drop hole 7a, and the lubricating oil flows into the first sliding hole 13. It is dropped onto the periphery of the pair of contact surfaces 15.

[0018] One side 5b of the large end 5a and the crank arm 1c forming the first sliding contact surface pair 15 The first groove group 1 rotates relative to the opposing surface 1e while sliding on each other. The grooves 11a and 11b of the first grooves 11a and 11b intersect one after another and adhere to the periphery of the first pair of sliding surfaces 15. The lubricating oil is guided toward the pin side bearing 6. Further, the other side surface 5c of the large end portion 5a constituting the second sliding contact surface pair 16 and the crankshaft The opposing surface 1f of the drum 1d rotates relative to the opposing surface 1f while sliding on each other. The grooves 12a and 12b of the groove group 12 intersect one after another to lubricate the pin side bearing 6. The lubricating oil is guided toward the periphery of the second pair of sliding surfaces 16.

[0019] Therefore, as shown in FIG. 9, the large end 5a of the connecting rod 5 and the crank pin 1a In between, lubricating oil flows from the first pair of sliding surfaces 15 to the second pair of sliding surfaces 16. This occurs, and lubricating oil is supplied to the pin side bearing 6. The lubricating oil that lubricates the pin side bearing 6 is supplied from the oil drip hole in the cylinder block 7. Since the oil is dripped from 13, the oil passage inside the crankshaft 1 that was previously required is eliminated. Omitted.

[0020] In addition, in this embodiment, an oil dripping hole 13 is provided as an oil dripping means. , the configuration is such that lubricating oil is actively dripped from the cylinder block 7, but this is not the only option. However, this oil dripping means may be omitted. In this case, the engine When the lubricating oil rotates, the lubricating oil is scattered inside the crank chamber, and the first The pin side bearing 6 can be lubricated with the lubricating oil attached to the periphery of the sliding contact surface pair 15. desirable.

[0021] Further, in this embodiment, one side 5b of the large end 5a of the connecting rod 5 and the clamp Grooves 11a and 11b are provided on the opposing surface 1e of the arm 1c, respectively, and the large end 5a Grooves 12a and 12 are formed on the other side surface 5c and the opposing surface 1f of the crank arm 1d, respectively. b is provided, but it is not limited to this. That is, between the one side surface 5b and the opposing surface 1e, , a groove is provided only on one of the surfaces, and either the other side surface 5c or the opposing surface 1f is formed. Grooves may be provided only on one surface.

[0022]

[Effect of the idea]

As explained above, according to the present invention, the lubricating oil supply device for an internal combustion engine can be With this structure, the pin side bearing can be lubricated without going through the crankshaft. It becomes possible to supply lubricating oil. Also, it is necessary to provide an oil passage on the crankshaft. Since there are no There is fruit.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a lubricating oil supply device for an internal combustion engine to which the present invention is applied.

FIG. 2 is a sectional view of a cylinder block to which the lubricating oil supply device for an internal combustion engine according to the present invention is applied.

FIG. 3 is a sectional view of a main part of the crankshaft shown in FIG. 1;

FIG. 4 is a front view of the first groove group shown in FIG. 1;

FIG. 5 is a diagram illustrating a concept in which the first groove group in FIG. 1 guides lubricating oil.

6 is a front view showing another embodiment of FIG. 4. FIG.

7 is a front view of the second groove group shown in FIG. 1. FIG.

FIG. 8 is a diagram illustrating a concept in which the second groove group in FIG. 1 guides lubricating oil.

9 is a schematic configuration diagram showing the flow of lubricating oil supplied to the pin-side bearing in FIG. 1. FIG.

[Explanation of symbols]

1 crankshaft 1a crank pin 1c, 1d crank arm 5 Connecting rod 6 Pin side bearing 11a, 11b, 12a, 12b groove 15 First sliding surface pair 16 Second sliding surface pair

Claims (1)

[Scope of utility model registration request] 1. A lubricating oil supply device for supplying lubricating oil to a bearing interposed between a crank pin of a crankshaft and a large end of a connecting rod in an internal combustion engine, comprising: Provided on at least one sliding surface of a pair of first sliding surfaces of opposing crank arms that are in sliding contact with each other, when the crankshaft rotates and the large end portion and the crank arm rotate relative to each other while sliding, A first groove group on the peripheral edge of the first pair of sliding surfaces that guides the lubricating oil toward the bearing side, and a second sliding contact that slides on the other side of the large end and the crank arm opposite thereto. Provided on at least one sliding surface of the pair of surfaces,
a second group of grooves that guide lubricating oil on the bearing side toward the periphery of the second pair of sliding surfaces when the crankshaft rotates and the large end portion and the crank arm rotate relative to each other while sliding; A lubricating oil supply device for an internal combustion engine, characterized by: