JP5894942B2 - Liquid injection nozzle for on-vehicle equipment - Google Patents

Description

  The present invention relates to a liquid injection nozzle for a vehicle mounting apparatus that injects a liquid such as oil into the vehicle mounting apparatus in an assembly line of the vehicle mounting apparatus, for example.

  Conventionally, a leak test unit is arranged on the engine assembly line, and an oil injection unit is arranged downstream of the leak test unit. After an inspection of the leaked engine on the conveyance line, the engine oil is injected. An engine oil injecting method and injecting apparatus are disclosed (for example, see Patent Document 1).

JP 2000-53197 A

  For example, when liquid such as engine oil is injected into the engine from the injection pipe, the engine oil adheres to the injection pipe and remains due to surface tension. For this reason, if the injection pipe is separated from the oil injection port after the engine oil is injected, the residual oil may sag around the oil injection port and further flow down to contaminate the engine. The engine oil adhering to the engine may be mistaken as oil leaking from the engine, so usually the cleaning liquid is sprayed and wiped with a waste cloth, etc., which may hinder the work efficiency. . The engine oil injection method and the injection device described in Patent Document 1 do not describe oil dripping from the injection pipe, and there is room for improvement of the injection device.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a liquid injection nozzle for a vehicle-mounted device capable of preventing dripping of residual liquid from the injection pipe after the liquid is injected. It is in.

In order to achieve the above object, the invention according to claim 1
A liquid injection nozzle for a vehicle-mounted device connected to an injection pipe for injecting liquid into the vehicle-mounted device and having an injection hole at the tip,
The distal end portion is formed with a liquid storage chamber having a maximum diameter portion larger than the injection hole and gradually reducing in diameter from the maximum diameter portion toward the injection hole side , and
In the vehicle-mounted device liquid injection nozzle, a first seal portion having a substantially conical hole portion, the diameter of which is gradually reduced toward the injection hole, and the first seal portion attached to the first seal portion. A second seal portion having a hole portion having a smaller diameter than the conical hole portion,
The liquid storage chamber is formed by the substantially conical hole portion of the first seal portion and the surface of the second seal portion in contact with the maximum diameter portion .

In addition to the configuration of claim 1, the invention according to claim 2
The vehicle-mounted device is an engine,
The liquid is engine oil.

In addition to the configuration of claim 1 or 2, the invention according to claim 3
The vehicle mounting apparatus liquid injection nozzle includes a valve body that is urged upstream of the liquid storage chamber by an elastic member in a direction to close the oil passage of the vehicle mounting apparatus liquid injection nozzle. A valve is provided.

The invention according to claim 4 includes, in addition to the structure according to any one of claims 1 to 3 ,
The liquid injection nozzle for a vehicle mounting device is connected to the vehicle mounting device from a direction inclined with respect to a vertical direction.
In addition to the structure of any one of Claims 1-4, the invention which concerns on Claim 5 is
The tip portion is provided with a conical hole that gradually increases in diameter from the liquid storage chamber toward the tip, and communicates with the liquid storage chamber.

According to the invention of claim 1, since liquid such as oil remaining in the injection pipe after injection stays in the liquid storage chamber, it is possible to prevent dripping of the residual liquid from the liquid injection nozzle for the vehicle-mounted device, It is possible to prevent the vehicle-mounted device from being contaminated by the dripping of the residual liquid. Further, along with this, work such as wiping is unnecessary, and work efficiency is improved. Further, since the liquid storage chamber is configured so that the diameter gradually decreases from the maximum diameter portion toward the injection hole, the liquid staying in the liquid storage chamber is discharged from the injection hole together with the liquid during the liquid injection. As a result, the liquid storage chamber can retain the liquid dripping until the next liquid injection, and the liquid can be prevented from overflowing from the liquid storage chamber after the injection. In addition, for example, it is possible to easily create a liquid storage chamber having a large-diameter portion in the middle and having a shape difficult to process.

  According to the invention of claim 2, work efficiency in the assembly line of the engine can be improved.

  According to the invention of claim 3, since the amount of liquid remaining in the liquid injection nozzle can be reduced, it is possible to more effectively prevent the residual liquid from dripping from the liquid injection nozzle for a vehicle-mounted device.

According to the fourth aspect of the present invention, it is possible to prevent the residual liquid from dripping from the liquid injection nozzle for the vehicle mounting device even in the vehicle mounting device in which the liquid injection port is inclined and the liquid injection port is inclined. It is possible to prevent the vehicle-mounted device from being soiled by dripping of the residual liquid.

It is a front view of the liquid injection nozzle for engines which shows the state which injects oil into the engine in which the oil injection opening was provided in the upper flat surface. It is a front view of the liquid injection nozzle for engines which shows the state which injects oil into the engine in which the oil injection port was provided in the upper inclined surface. It is explanatory drawing which shows the structure of the liquid injection nozzle for engines of one Embodiment which concerns on this invention. (A) is sectional drawing of the liquid injection nozzle for engines in the state by which the oil path was closed by the non-return valve, (b) is sectional drawing of the liquid injection nozzle for engines in the state where the non-return valve opened. (A) is sectional drawing of the engine liquid injection | pouring nozzle with which the non-return valve was closed and orient | assigned to the orthogonal | vertical direction, (b) is a principal part enlarged view of (a). (A) A cross-sectional view of an inclined engine liquid injection nozzle with the check valve closed and (b) is an enlarged view of the main part of (a).

  Hereinafter, a liquid injection nozzle for an engine as an embodiment of a liquid injection nozzle for a vehicle-mounted device according to the present invention will be described with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

  In the engine assembly line, engine oil is injected into the engine from an injection pipe near the final process of the assembly process. Usually, since there are a plurality of types of engines, a plurality of types of engine oils having different specifications are prepared for each engine, and a predetermined amount of engine oil is injected according to each engine. Also, the position of the oil inlet of the engine is often different for each engine. For example, in the engine 40A shown in FIG. 1, the oil inlet 41 is provided on the upper flat surface 42, and the opening is directed upward in the vertical direction. Open. For such an engine 40A, the engine liquid injection nozzle 10 for injecting engine oil is connected to the oil injection port 41 in a vertically downward state to inject engine oil.

  On the other hand, in the engine 40B shown in FIG. 2, the oil injection port 41 is provided in the upper inclined surface 43, and the opening is opened obliquely upward. For such an engine 40B, the engine liquid injection nozzle 10 is connected to the oil injection port 41 in an inclined state to inject engine oil.

  As described above, the engine 40 (hereinafter, the engines 40A and 40B may be collectively referred to as the engine 40) allows the engine oil having different oil specifications and injection capacities to be supplied from the oil inlet 41 having a different position for each engine. Although it is necessary to inject, it is not realistic to prepare a plurality of types of oil injection devices for each engine 40.

  The liquid injection nozzle for an engine exemplified in the following embodiments has different oil specifications, injection capacities, and oil injection port positions, and in particular, a single liquid injection nozzle supports a plurality of engines having different oil injection port positions. It is possible.

  As shown in FIG. 3, the engine liquid injection nozzle 10 of the present embodiment is provided at the tip (downstream side) of an integrated injection pipe 36 in which three injection pipes 35 </ b> A, 35 </ b> B, 35 </ b> C are merged into one. It is connected. The upstream ends of the three injection pipes 35A, 35B, and 35C are connected to oil tanks 37A, 37B, and 37C that store engine oils having different specifications, respectively, and intermediate portions of the injection pipes 35A, 35B, and 35C are connected to each other. On-off valves 38A, 38B, and 38C for opening and closing the flow paths of the injection pipes 35A, 35B, and 35C are provided. The on-off valves 38A, 38B, and 38C are connected to a control device (not shown) and controlled to open and close, and the amount of engine oil injected into the engine 40 is controlled with reference to a flow signal from a flow meter (not shown).

  Referring also to FIG. 4, the engine liquid injection nozzle 10 includes a check valve 11, a first joint 12, a first seal portion 13, a second seal portion 14, and a cap 15 assembled in this order. It has the structure which was made. Specifically, the first joint 12 is formed such that male screw portions 12b and 12c protrude from the flange portion 12a formed at the intermediate portion in the axial direction on both sides in the axial direction, and one male screw portion 12b is reversed. The male screw 11 a of the stop valve 11 is screwed to be connected to the check valve 11, and the other male screw portion 12 c is screwed to the female screw 15 a of the cap 15.

  A seal chamber 16 having a step portion 15b is provided at the lower portion of the cap 15 so as to be continuous with the female screw 15a. Further, from the seal chamber 16, a conical hole 17 that gradually increases in diameter as it goes downward is communicated with the seal chamber 16. Is provided. In the seal chamber 16, the first seal portion 13 and the second seal portion 14 are accommodated while being sandwiched between the male screw portion 12 c and the step portion 15 b. Such an engine liquid injection nozzle 10 is connected to the integrated injection pipe 36 via the second joint 25 screwed into the integrated injection pipe 36.

  A valve body 20 that is biased toward the valve seat 19 by a spring 30 is disposed in the oil passage 18 of the check valve 11, and the oil passage 18 is normally closed.

  The first seal portion 13 has a substantially conical hole portion 22 that gradually decreases in diameter toward the injection hole 21 formed at the tip. Further, the second seal portion 14 has a hole portion 23 having a smaller diameter than the conical hole portion 22, and is accommodated in the seal chamber 16 while being overlapped with the first seal portion 13. An oil storage chamber 24, which is a substantially conical space, is formed by the substantially conical hole 22 of the first seal portion 13 and the lower surface of the second seal portion 14.

  In the engine liquid injection nozzle 10, as shown in FIG. 4A, the valve body 20 biased by the spring 30 is normally brought into contact with the valve seat 19 to close the oil passage 18. At this time, the amount of engine oil remaining in the oil passage 18 on the downstream side of the valve body 20 is very small, and the diameter of the injection hole 21 is small, for example, about 4 mm. It is held in the oil passage 18 without dripping from the hole 21.

  When an open / close valve selected from the open / close valves 38A, 38B, and 38C, for example, the open / close valve 38A, is opened by an instruction from the control device, the engine oil stored in the oil tank 37A is injected into the injection pipe 35A and Oil is sent to the engine liquid injection nozzle 10 via the integrated injection pipe 36.

  As a result, as shown in FIG. 4B, the valve body 20 is separated from the valve seat 19 against the biasing force of the spring 30, the oil passage 18 is opened, and the engine oil is discharged from the injection hole 21. When a predetermined amount of engine oil is injected into the engine 40, the on-off valve 38A is closed based on a stop command from the control device, and at the same time, the check valve 11 is also operated to close the oil passage 18, and the injection hole The engine oil discharge from 21 stops.

  Next, the attitude of the engine liquid injection nozzle 10 and the dripping of the engine oil from the engine liquid injection nozzle 10 when the engine oil is injected into the engine 40 from the oil injection port 41 will be described.

  FIG. 5 shows a case where engine oil is injected from an oil injection port 41 (see FIG. 1) whose opening portion opens upward in the vertical direction, and the engine liquid injection nozzle 10 faces in the vertical direction. Is connected to the oil inlet 41. In the engine oil injection with this posture, the amount of engine oil remaining in the oil passage 18 on the downstream side of the check valve 11 is reduced by disposing the check valve 11 in the engine liquid injection nozzle 10 (for example, oil remaining By reducing the diameter of the injection hole 21 (for example, 4 mm), the engine oil is held in the oil passage 18 by the surface tension and droops from the engine liquid injection nozzle 10. Is prevented.

  FIG. 6 shows a case where engine oil is injected from an oil injection port 41 (see FIG. 2) whose opening portion opens obliquely upward, and the engine liquid injection nozzle 10 is oiled in an inclined state. Connected to the inlet 41. In the engine oil injection in this posture, the engine oil cannot be held in the oil passage 18 only by the surface tension of the engine oil, and a small amount (for example, 0.5 ml) of engine oil is retained in the second seal portion. 14 may hang down from the 14 small-diameter holes 23. The engine oil that hangs down from the hole 23 of the second seal portion 14 stays in the oil storage chamber 24, thereby preventing the engine oil from dripping from the engine liquid injection nozzle 10.

  When the engine liquid injection nozzle 10 is inclined, the effective capacity of the oil storage chamber 24 that can substantially store the engine oil is the lower end portion DP of the injection hole 21 as shown in FIG. The capacity of the region A below the horizontal line HL extending from the region A is set to be larger than the amount of engine oil dripping from the hole 23 of the second seal portion 14.

  The engine oil that hangs down from the hole 23 of the second seal portion 14 and remains in the oil storage chamber 24 (region A) at the time of the previous engine oil injection is the hole 23 of the second seal portion 14 when the engine oil is injected. The engine oil discharged from the engine is injected into the engine. Therefore, even when the engine oil drips from the hole 23 of the second seal portion 14 after the injection, the oil storage chamber 24 can retain the drooping engine oil. As a result, the engine oil dripping from the hole 23 of the second seal portion 14 stays in the oil storage chamber 24 every time the oil is injected, and the engine oil is prevented from dripping from the engine liquid injection nozzle 10.

  As described above, according to the engine liquid injection nozzle 10 according to the present embodiment, the oil storage chamber 24 that gradually decreases in diameter from the largest diameter portion larger in diameter than the injection hole 21 toward the injection hole 21 side is the tip. It is formed in the part. Therefore, since the engine oil remaining after the injection is retained in the oil storage chamber 24, it is possible to prevent the engine oil from dripping from the engine liquid injection nozzle 10, and it is possible to prevent engine contamination due to the engine oil. In addition, the oil wiping work is not necessary and the work efficiency is improved. Further, since the oil storage chamber 24 is configured to gradually reduce in diameter from the maximum diameter portion toward the injection hole 21 side, the engine oil staying in the oil storage chamber 24 is injected together with the engine oil when the engine oil is injected. It discharges from the hole 21. Thereby, the oil storage chamber 24 can retain the engine oil dripping before the next engine oil injection, and it is possible to prevent the engine oil from overflowing from the oil storage chamber 24 after the injection and causing oil dripping. it can.

  Further, since the check valve 11 that closes the oil passage 18 is disposed upstream of the oil storage chamber 24 in the engine liquid injection nozzle 10, the amount of engine oil remaining in the liquid injection nozzle 10 is reduced. The engine oil dripping can be prevented. Note that the check valve 11 is not necessarily provided, and engine oil dripping may be prevented by appropriately changing the diameter of the injection hole 21 and the like.

  The oil storage chamber 24 has a first seal portion 13 having a substantially conical hole portion 22 that gradually decreases in diameter toward the injection hole 21, and is attached to the first seal portion 13 rather than the conical hole portion 22. Since the second seal portion 14 having the small-diameter hole portion 23 is formed, for example, the oil storage chamber 24 having a large-diameter portion in the middle and having a shape difficult to be obtained by normal processing can be easily created.

  Since the engine liquid injection nozzle 10 can be connected to the engine from a direction inclined with respect to the vertical direction, an oil injection port 41 on the upper inclined surface 43 side of the engine 40 is provided. Also in the engine 40, engine oil dripping from the engine liquid injection nozzle 10 can be prevented, and engine dirt due to engine oil can be prevented.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.

  In the above-described embodiment, the engine is exemplified as the vehicle-mounted device. However, the present invention is not limited to this, and a transmission, a brake, a radiator, or the like can be used as the vehicle-mounted device. It can be used for injection of a radiator liquid or the like.

  In the above embodiment, the pipe connected to the engine liquid injection nozzle 10 is the integrated injection pipe 36 in which the three injection pipes 35A, 35B, and 35C are merged into one. Not limited to this, it may be connected to only one injection pipe, or may be connected to an integrated injection pipe in which two or more injection pipes are merged into one.

10 Liquid injection nozzle for engine (liquid injection nozzle for on-vehicle equipment)
DESCRIPTION OF SYMBOLS 11 Check valve 13 1st seal part 14 2nd seal part 18 Oil path 19 Valve seat 20 Valve body 21 Injection hole 22 Substantially conical hole 23 Hole 24 Oil storage chamber (liquid storage chamber)
30 Spring (elastic member)
36 Integrated injection pipe 40, 40A, 40B Engine (vehicle mounted device)

Claims (5)

A liquid injection nozzle for a vehicle-mounted device connected to an injection pipe for injecting liquid into the vehicle-mounted device and having an injection hole at the tip,
The distal end portion is formed with a liquid storage chamber having a maximum diameter portion larger than the injection hole and gradually reducing in diameter from the maximum diameter portion toward the injection hole side , and
In the vehicle-mounted device liquid injection nozzle, a first seal portion having a substantially conical hole portion, the diameter of which is gradually reduced toward the injection hole, and the first seal portion attached to the first seal portion. A second seal portion having a hole portion having a smaller diameter than the conical hole portion,
The liquid for a vehicle mounting apparatus , wherein the liquid storage chamber is formed by the substantially conical hole portion of the first seal portion and a surface of the second seal portion that contacts the maximum diameter portion. Injection nozzle. The vehicle-mounted device is an engine,
The liquid injection nozzle for a vehicle-mounted device according to claim 1, wherein the liquid is engine oil.   The vehicle mounting apparatus liquid injection nozzle includes a valve body that is urged upstream of the liquid storage chamber by an elastic member in a direction to close the oil passage of the vehicle mounting apparatus liquid injection nozzle. The liquid injection nozzle for a vehicle-mounted device according to claim 1, wherein a valve is provided. The liquid injection nozzle for a vehicle mounting device according to any one of claims 1 to 3 , wherein the liquid injection nozzle for the vehicle mounting device is connected to the vehicle mounting device from a direction inclined with respect to a vertical direction. nozzle. 5. The conical hole that gradually increases in diameter toward the tip from the liquid storage chamber is provided in the tip portion so as to communicate with the liquid storage chamber. The liquid injection nozzle for vehicle-mounted devices as described.

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