JP2018168813A - Oil injector for internal combustion engine - Google Patents

Abstract

To surely obtain a state that an oil filler cap can be screwed by a proper fastening axial force without causing a variation by simple means.SOLUTION: An oil containing member 12 overlapped on an apex face 2a of a lubricant supply port 2 is arranged at a flange part 8 of an oil injector 6. Oil is supplied to the oil containing member 12 via, for example, an annular groove 13. A supply amount of the oil to the oil containing member 12 is adjustable by a flow rate adjusting implement 17. Since the apex face 2a of the lubricant supply port 2 is get wet by the oil, when screwing the oil filler cap after injecting a lubricant after the assembling of an internal combustion engine, friction between the oil filler cap and the apex face is reduced, and the oil filler cap is screwed to a state that a prescribed fastening axial force can be obtained without causing a variation. Since the application of the oil is automatically performed in an injection process of the lubricant, a problem such as the forgetting of the application does not occur.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an oil injection device for injecting lubricating oil into an internal combustion engine.

  The lubricating oil supply port of the internal combustion engine is generally provided in the head cover and is closed with a screw-in type resin oil filler cap. And at the shipping stage where the internal combustion engine was manufactured and lubricating oil was injected, the oil filler cap was screwed with a predetermined torque to ensure an appropriate sealing state, but the top surface of the lubricating oil supply port was dry Due to the high friction coefficient, there is a problem that even if the oil filler cap is screwed with a predetermined torque, the gasket is not completely tightened due to deformation of the gasket, and the tightening axial force cannot be secured, so that looseness is likely to occur.

  Therefore, after assembling the internal combustion engine (or after the internal combustion engine is mounted on the vehicle), lubricating oil is injected, and then oil is applied to the top surface of the lubricating oil supply port using a jig, so that the oil filler It is done to improve the sliding of the cap. On the other hand, as disclosed in Patent Document 1, it has been proposed to devise the shape of the sealing surface of the gasket on the lower surface of the oil filler cap to prevent the loosening torque of the oil filler cap once tightened from becoming excessive. Yes.

JP-A-08-277738

  Applying oil to the top surface of the lubricating oil supply port is effective in reducing the frictional resistance with the oil filler cap, and forming an oil film on the top surface of the lubricating oil supply port eliminates variations. Therefore, it is possible to secure an appropriate tightening axial force and prevent the oil filler cap from loosening. However, since the application of oil is performed manually using a different jig after the injection of lubricating oil, forgetting to apply or variations in the amount of application may occur. was there.

  The present invention has been made in view of such a current situation, and intends to realize a state in which an oil filler cap can be appropriately screwed without variation by simple means.

  As described above, forming an oil film on the top surface of the lubricating oil supply port is a simple method, but secures the required tightening axial force and screws the oil filler cap into an appropriate state without loosening. There are advantages you can do. The inventors of the present application paid attention to this point and completed the present invention.

  That is, the present invention is an improvement of an oil injection device, which includes a nozzle that is inserted into a lubricating oil supply port provided in an internal combustion engine, and a flange portion that covers the top surface of the lubricating oil supply port. The flange part or the nozzle or both are provided with oil application means for attaching oil to the top surface of the lubricating oil supply port where the oil filler cap overlaps.

  In the present invention, since the oil is applied to the top surface of the lubricating oil supply port by the oil application means provided in the oil injection device, the oil can be reliably applied to the lubricating oil supply port. That is, since the oil is automatically applied to the top surface of the lubricating oil supply port during the lubricating oil injection process, the oil can be reliably applied to the top surface of the lubricating oil supply port. As a result, the oil filler cap can be screwed into an appropriate state to optimize the tightening axial force, thereby improving the quality of the internal combustion engine.

  Also, since the oil is applied during the lubricating oil injection process, the burden on the operator can be reduced and the efficiency of the lubricating oil injection work can be improved compared to the conventional case where the oil is applied using a jig. it can.

(A) is a perspective view of a head cover, (B) is sectional drawing of the lubricating oil supply port in the state closed with the oil filler cap. (A) is a longitudinal sectional view of the first embodiment, (B) is a longitudinal sectional view of an essential part of the second embodiment, and (C) is a longitudinal sectional view of an essential part of the third embodiment. (A) is a longitudinal sectional view of the fourth embodiment, and (B) is a longitudinal sectional view of the fifth embodiment. It is a longitudinal cross-sectional view of 6th Embodiment.

  FIG. 1A is a perspective view of the head cover 1, and a lubricating oil supply port 2 protrudes upward at one corner portion of the head cover 1. The lubricating oil supply port 2 includes a top surface 2a on which the oil filler cap 3 overlaps from above, and a female screw 5 into which the male screw portion 3a of the oil filler cap 3 is screwed. A portion of the oil filler cap 3 that overlaps the top surface 2a of the lubricating oil supply port 2 is formed in a disc shape, and a ring-shaped gasket 4 is attached to the annular groove 13 formed in the lower surface of the disc-like portion. In addition, a single letter-shaped knob 3b is provided on the upper surface of the disk-shaped portion.

  After the internal combustion engine is assembled, lubricating oil is injected into the engine body from the lubricating oil supply port 2 using an oil injection device. In the present invention, the lubricating oil supply port 2 is Oil is applied to the top surface 2a. A specific example will be described next.

(1). First to Third Embodiments FIG. 2A shows a first embodiment. The oil injection device 6 is arranged as a basic element so as to partially cover the inside of the lubricating oil supply port 2 and to be fixed to the nozzle 7 so as to cover the top surface 2a of the lubricating oil supply port 2 from above. The nozzle 7 is provided integrally with the oil supply cylinder 9. The oil supply cylinder 9 is fixed to a holder 10, and a handle and an oiling switch (none of which are shown) that are held by a person are provided on the holder 10. Lubricating oil is sent to the oil supply cylinder 9 via the hose 11.

  In the present embodiment, a donut plate-like oil-containing member (oil stamp material) 12 is attached to the lower surface of the flange portion 8 as oil coating means. The oil-containing member 12 is made of a sponge-like material having continuous pores, and the oil film can be transferred to the top surface 2 a of the lubricating oil supply port 2 by impregnating oil. In addition, the oil-containing member 12 can use various materials, such as cloth shape and nonwoven fabric shape.

  Further, the flange portion 8 is formed with an annular groove 13 facing the oil-containing member 12 as part of the oil application means. A passage 14 communicating with the annular groove 13 is provided, and the passage 14 and the oil container 15 are hose. And so on. The oil container 15 is provided at a position higher than the flange portion 8, and a flow rate adjusting tool 17 used in the drip device is inserted in the pipe line 16. The flow rate adjuster 17 may be fixed to the container 15 or may be fixed to the flange portion 8.

  The container 15 is fixed to the holder 10 by a bracket 18. However, the pipe line 16 may be composed of a flexible hose, and the container 15 may be arranged at a position different from the holder 10. Note that the oil supplied to the oil-containing member 12 can be the same as the lubricating oil injected into the engine body.

  In this embodiment, since the oil impregnated member 12 is impregnated with the oil, the nozzle 7 is inserted into the lubricating oil supply port 2 to inject the lubricating oil, and the oil impregnated member 12 is placed on the top surface 2 a of the lubricating oil supply port 2. When applied, the oil automatically transfers from the oil-containing member 12 to the top surface 2 a of the lubricating oil supply port 2, and an oil film is formed on the top surface 2 a of the lubricating oil supply port 2.

Accordingly, when the oil filler cap 3 of FIG. 1 is screwed with a predetermined torque after the lubricating oil is injected, the friction between the oil filler cap 3 and the top surface 2a is remarkably reduced, and a predetermined tightening axial force can be secured without variation. . And since the formation of the oil film on the top surface 2a is automatically performed along with the oil injection process, there is no problem such as forgetting to form the oil film, and no oil coating process using a jig is required. Therefore, the efficiency of the injection work can be improved.

  When the oil-containing member 12 is used as the oil application means as in the embodiment, there is an advantage that the oil can be accurately applied to the top surface 2a of the lubricating oil supply port 2 with a simple structure. Further, when the flow rate adjusting device 17 is provided as in the embodiment, there is an advantage that an appropriate amount of oil can be supplied to the oil-containing member 12 even if the viscosity of the oil changes. The oil flow rate can also be adjusted by changing the height of the container 15.

  In the first embodiment, the annular groove 13 is opened downward, but in the second embodiment shown in FIG. 2B, the annular groove 13 is opened toward the nozzle 7 in the inner circumferential direction. Therefore, the location of the annular groove 13 is an annular space. A large number of vertical holes 19 are formed in the flange portion 8 along the circumferential direction and open toward the oil-containing member 12 while communicating with the annular groove 13. In this embodiment, even if the oil-impregnated member 12 hits the top surface 2a of the lubricating oil supply port 2, the oil-impregnated member 12 is not deformed so as to enter the annular groove 13, so that the durability of the oil-impregnated member 12 can be improved.

  In the above two embodiments, the oil impregnated member 12 is used, but in the third embodiment shown in FIG. 2C, the oil impregnated member 12 is not used, and the annular groove 13 is provided between the upper and lower surfaces of the flange portion 8. A number of application holes 20 are formed along the week direction so as to communicate with the annular groove 13 and open downward.

  In this embodiment, the surface tension of the oil can be used to keep the oil protruding downward from each application hole 20, and the flange portion 8 is overlaid on the top surface 2 a of the lubricating oil supply port 2. Oil can be supplied in time. In this third embodiment, oil adheres to the top surface 2a of the lubricating oil supply port 2 in a jumping state, but the oil spreads to the top surface 2a by screwing the oil filler cap 3, so that the effect of reducing frictional resistance is oil-impregnated. The same as when the member 12 is used.

(2) Fourth and fifth embodiments In the fourth and fifth embodiments shown in FIG. 3, a part of the lubricating oil injected into the engine is led to the top surface of the lubricating oil supply port 2. That is, first, the fourth embodiment shown in (A) will be described. In this embodiment, as in the first embodiment, when the oil-impregnated member 12 is attached to the lower surface of the flange portion 8 as oil application means, the nozzle 7, a large number of lateral holes 21 opened toward the inner peripheral surface of the oil retaining member 12 are formed along the circumferential direction. Therefore, the lateral hole 21 also constitutes an oiling means.

  Further, in the fifth embodiment shown in FIG. 3B, an inward annular groove 13 that opens toward the outer peripheral surface of the nozzle 7 is formed in the flange portion 8, and the nozzle 7 communicates with the annular groove 13. While the large number of horizontal holes 21 are formed, the flange portion 8 is formed with a large number of vertical holes 19 in the circumferential direction that communicate with the annular groove 13 and open toward the oil-containing member 12.

  In these embodiments of FIG. 3, a part of the lubricating oil injected into the engine is used for applying the lubricating oil supply port 2, so that the oil injection device 6 is simplified. The amount of oil supplied to the oil-containing member 12 can be set to an appropriate amount by adjusting the inner diameter and number of the lateral holes 21. In the case of FIG. 3A, the horizontal hole 21 can be inclined so as to be lowered toward the oil-containing member 12, and in this case, the lubricating oil easily enters the horizontal hole 21.

(3). Sixth Embodiment After the lubricating oil is injected by the oil injection device 6, the lubricating oil adhering to the inner peripheral surface of the lubricating oil supply port 2 is blown off inside the head cover 1 by air blow (compressed air). In the sixth embodiment shown in FIG. 4, the lubricating oil is attached to the top surface 2 a of the lubricating oil supply port 2 using air blow.

  That is, in the sixth embodiment, the air blow hole 22 opened at the tip surface of the nozzle 7 is formed to jump in the circumferential direction, while the flange portion 8 is formed with the top surface 2a of the lubricating oil supply port 2 when lubricating oil is injected. The recesses 23 are formed so that a certain distance is left between them. When the lubricating oil is injected, the flange portion 8 is in contact with a portion of the lubricating oil supply port 2 outside the top surface 2a. Compressed air is sent from the hose 26 to the air blow hole 22 through the collecting passage 25.

  Then, after the injection of the lubricating oil is finished, when compressed air is ejected from the air blow hole 22 by a switch operation or the like, a part of the oil adhering to the inner peripheral surface of the lubricating oil supply port 2 becomes mitos and the flange portion 8 blows up (reversely flows) into the recess 23, and a part thereof adheres to the top surface 2 a of the lubricating oil supply port 2. Therefore, in the sixth embodiment, the oil blowing means is configured by the air blow hole 22 and the recess 23.

  Also in the sixth embodiment, the top surface 2a of the lubricating oil supply port 2 is wetted with oil by using a part of the lubricating oil injected into the engine, so that the oil application means protrudes outside. Therefore, the oil injection device 6 can be prevented from being enlarged. A part of the air blow may be blown from the outer peripheral surface of the nozzle 7.

  The embodiment of the present invention has been described above, but the present invention can be embodied in various ways. For example, a large number of oil holes that open toward the top surface of the lubricating oil supply port are provided in the flange portion in the circumferential direction, and needle-type valve rods are disposed on the sliding members in the respective oil holes to provide an oil injection device. Is set to the lubricating oil supply port, the valve stem hits the top surface and rises, so that oil drops from the oil hole to the top surface of the lubricating oil supply port, and when the oil injection device is separated from the lubricating oil supply port, the valve stem It is also possible to adopt a configuration in which the oil drops are closed, the oil hole is blocked by the valve rod, and the dripping of oil stops.

  The present invention can actually be embodied in an oil injection device. Therefore, it can be used industrially.

DESCRIPTION OF SYMBOLS 1 Head cover 2 Lubricating oil supply port 2a Top surface of lubricating oil supply port 3 Oil filler cap 5 Female screw 6 Oil injection device 7 Nozzle 8 Flange part 12 Oil containing member which comprises oil coating means 13 Annular groove which comprises oil coating means 15 Container Reference Signs List 16 Pipe Line 17 Flow Control Tool 19 Vertical Hole Constructing Oiling Means 21 Horizontal Hole Constructing Oiling Means 22 Air Blow Hole Constructing Oiling Means 23 Recessed Flange Constructing Oiling Means

Claims (1)

A nozzle that is inserted into a lubricating oil supply port provided in the internal combustion engine; and a flange portion that covers a top surface of the lubricating oil supply port; Oiling means for attaching oil to the top surface where the oil filler cap overlaps is provided,
Oil injection device for internal combustion engines.

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