JP2022094496A - Lubrication pipe - Google Patents

Abstract

To provide a lubrication pipe having high formability.SOLUTION: A lubrication pipe has a protruded discharge part for discharging lubricating oil. A shape and a height of the discharge part is common with a shape and a height of a reinforcing part which is provided side by side with and separately from the discharge part and integrally molded with the lubrication pipe.SELECTED DRAWING: Figure 5

Description

The present invention relates to a lubricating pipe.

In a lubrication device in a power transmission device for a vehicle, a resin lubrication pipe that supplies lubricating oil to a portion requiring lubrication is known. Lubrication is required at the parts that require lubrication in the power transmission device, such as the meshing part of the gear that transmits power, the transmission belt, and the bearing that rotatably supports the rotating shaft of the power transmission mechanism. This corresponds to the frictional part.

The lubrication pipe includes a plurality of resin-made divided parts that are divided into two in the circumferential direction along the path of the oil passage, specifically, three divided parts, a base divided part, a first divided part, and a second divided part. Equipped with split parts. An oil passage is provided inside the lubrication pipe by arranging the base divided part between the first divided part and the second divided part and joining the first divided part and the second divided part to the base divided part respectively.

On the side opposite to the opening side of the split surface of the base split component, a hollow protruding nozzle portion extending in a straight line in a direction away from the base split component is provided integrally with the base split component. Further, the tip portion of the protruding nozzle portion is provided with a protruding discharge portion projecting in the longitudinal direction of the base dividing component. The discharge portion has a through hole inside. Lubricating oil flowing inside the protruding nozzle portion is discharged to the outside through the through hole (see Patent Document 1 above).

Japanese Unexamined Patent Publication No. 2019-188650

The above-mentioned discharge portion is provided at the same time as molding the base split component. Specifically, the slide mold built into the movable molding die is interlocked with the movable molding die via a cam or the like, and is perpendicular to the die cutting direction of the movable molding die, which is the same direction as the protruding nozzle portion extends. This discharge portion is provided by moving the slide mold in the direction of.

However, when the discharge portion having the through hole inside is formed by a slide type, the number of cast pins or nesting pins (hereinafter, simply referred to as “cast pins”) according to the shape of the discharge portion is slide type as many as the number of the discharge portions. Work to store in the dent occurs, and the cycle time for die cutting increases. In addition, since the cast-out pin is stored in the slide-type recess, the die-cutting structure becomes complicated. As described above, there is room for improvement in the formability of the lubricating pipe.

Therefore, it is an object of the present invention to provide a highly moldable lubricating pipe.

The lubricating pipe according to the present invention is a lubricating pipe having a protruding discharge portion for discharging lubricating oil, and the shape and height of the discharge portion are provided side by side with the discharge portion and separated from each other. It has the same shape and height as the reinforcing part integrally molded on the pipe.

According to the present invention, it is possible to provide a lubrication pipe having high moldability.

FIG. 1 is a diagram illustrating a transaxle. FIG. 2 is a hydraulic circuit diagram of the lubrication device. FIG. 3 is a schematic perspective view of the lubrication pipe. FIG. 4 is an exploded perspective view of the lubricating pipe. FIG. 5A is a partial side view of the lubricating pipe including the protruding nozzle portion. FIG. 5B is a partial bottom view of the protruding nozzle portion as seen from the Z direction. FIG. 6 is a cross-sectional view of a molding apparatus for molding a base divided part.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

As shown in FIG. 1, the hybrid vehicle 10 includes a transaxle 12, an engine 20, and a drive wheel 38. The engine 20 is an internal combustion engine that generates power by burning fuel. The engine 20 may be a gasoline engine or a diesel engine. The transaxle 12 is a power transmission device that transmits the output of the engine 20 to the drive wheels 38. The transaxle 12 is placed horizontally on an FF (Front-engine Front-drive) vehicle or the like in which a plurality of shafts of the gear-type power transmission mechanism 16 are arranged along the vehicle width direction. The power transmission mechanism 16 is housed in the case 14. The case 14 may be composed of a plurality of members, if necessary.

The power transmission mechanism 16 includes a first axis line S1 to a fourth axis line S4 that is substantially parallel to the vehicle width direction. An input shaft 22 connected to the engine 20 is provided on the first axis line S1. Further, on the first axis S1, a single pinion type planetary gear device 24 and a first motor generator MG1 are arranged concentrically with the first axis S1. The planetary gear device 24 and the first motor generator MG1 function as an electric differential unit. The input shaft 22 is connected to the carrier 24c of the planetary gear device 24 which is a differential mechanism. The first motor generator MG1 is connected to the sun gear 24s. The ring gear 24r is provided with an engine output gear Ge.

On the second axis S2, a reduction gear device 30 provided with reduction gears Gr1 and reduction gears Gr2 at both ends of the shaft 28 is disposed. The reduction gear Gr1 is meshed with the engine output gear Ge. Further, the reduction gear Gr1 is meshed with the motor output gear Gm of the second motor generator MG2 arranged on the third axis S3.

The reduction gear Gr2 is meshed with the differential gear Gd of the differential device 32 arranged on the fourth axis S4, and the driving force from the engine 20 and the second motor generator MG2 is driven by the differential device 32 via the differential device 32. It is distributed to 36 and transmitted to the drive wheels 38. The gear mechanism is composed of an engine output gear Ge, a reduction gear Gr1, a reduction gear Gr2, a differential ring gear Gd, and the like. The fourth axis S4 is defined at the lowermost position (low position) of the vehicle among the first axis S1 to the fourth axis S4. A part of the differential device 32 is immersed in the lubricating oil 48 in the oil storage portion 46 provided at the bottom of the case 14 (see FIG. 2).

In such a hybrid vehicle 10, for example, the EV (Electric Vehicle) driving mode and the HV (Hybrid Vehicle) driving mode are selectively selected according to a mode switching map defined with the required driving force (accelerator operation amount, etc.) and vehicle speed as parameters. Can be realized. The EV driving mode is a mode in which the second motor generator MG2 is used as a driving force source by power running control with the engine 20 stopped rotating, and is selected, for example, in a region of low required driving force, that is, a low load. To. The HV driving mode is a mode in which the engine 20 is used as a driving force source by regenerative control of the first motor generator MG1, and is selected in a region of higher required driving force (high load) than, for example, the EV driving mode. To. In this HV traveling mode, the second motor generator MG2 is used as a driving force source with assistive power running control during acceleration or the like, or is always power running controlled and used as a driving force source. In addition to the above HV driving mode or in addition to the HV driving mode, an engine driving mode in which the engine 20 is always used as a driving force source may be provided. Further, a mechanical transmission may be adopted instead of the electric differential unit.

As shown in FIG. 2, the transaxle 12 includes a lubrication device 40. The lubrication device 40 includes a first oil pump P1 and a second oil pump P2. As shown in FIG. 1, the first oil pump P1 is a mechanical oil pump that is mechanically rotationally driven via a pump drive gear Gp meshed with a differential ring gear Gd. The second oil pump P2 is a mechanical oil pump that is connected to the input shaft 22 and is mechanically rotationally driven by the engine 20. The first oil pump P1 and the second oil pump P2 share and lubricate each part of the power transmission mechanism 16.

As shown in FIG. 2, the first oil pump P1 and the second oil pump P2 are connected to different independent first supply oil passages 42 and second supply oil passages 44, respectively. The first oil pump P1 and the second oil pump P2 suck the lubricating oil 48 from the oil storage portion 46 provided at the bottom of the case 14 and discharge it to the first supply oil passage 42 and the second supply oil passage 44.

The oil storage unit 46 is composed of the case 14 itself. The oil storage unit 46 includes a first oil storage unit 52 in which a rear portion in the front-rear direction of the vehicle is separated from other portions by a first partition wall 50. The first oil storage portion 52 is a portion located below the differential device 32.

The portion other than the first oil storage portion 52 is further divided into two in the vehicle front-rear direction by the second partition wall 53. As a result, the oil storage unit 46 has a second oil storage unit 54 in the central portion adjacent to the first oil storage unit 52 and a third oil storage unit 56 in the vehicle front portion adjacent to the second oil storage unit 54. I have.

The suction port 58 of the first oil pump P1 is arranged in the second oil storage unit 54. The suction port 60 of the second oil pump P2 is arranged in the third oil storage unit 56. These two suction ports 58 and 60 are connected to the first oil pump P1 and the second oil pump P2 via separate suction oil passages provided independently.

The first partition wall 50 and the second partition wall 53 have an oil level height while allowing the lubricating oil 48 to flow between the first oil storage section 52, the second oil storage section 54, and the third oil storage section 56. It functions as a distribution restriction unit that limits the balance of oil. That is, when the vehicle is stopped, the operation of both the first oil pump P1 and the second oil pump P2 is stopped, and the fluctuation of the oil level height is stopped. When the lubricating oil 48 supplied to the oil flows down to the oil storage unit 46 and returns, it crosses the first partition wall 50 and the second partition wall 53 and crosses the first partition wall 50 and the second partition wall 53 as shown by the one-point chain line in FIG. 2, and the first oil storage unit 52 and the second The oil level heights in the oil storage unit 54 and the third oil storage unit 56 are the same.

On the other hand, when the vehicle is running or when the first oil pump P1 and the second oil pump P2 are operating, the lubricating oil 48 is supplied to each part of the transformer axle 12 and the amount of oil in the oil storage part 46 decreases, so that the oil level rises. Is lower than the upper ends of the first partition wall 50 and the second partition wall 53, and due to the flow restriction by the first partition wall 50 and the second partition wall 53, the first oil storage section 52, the second oil storage section 54, and the third The oil level height of the oil reservoir 56 changes individually as shown by the solid line.

The first oil pump P1 is connected to the differential device 32 and is rotationally driven. The first supply oil passage 42 connected to the discharge side of the first oil pump P1 supplies the lubricating oil 48 to the parts requiring lubrication in each part of the power transmission mechanism 16 through the discharge part 78 described later. The lubrication required portion is, for example, a bearing 62 of each part in the power transmission mechanism 16, various gears such as an engine output gear Ge, and a gear 64 including a differential ring gear Gd.

The second supply oil passage 44 connected to the discharge side of the second oil pump P2 lubricates the planetary gear device 24 and the first motor generator MG1 located above the second oil storage unit 54 and the third oil storage unit 56. Lubricating oil 48 is supplied to the required portion to lubricate it. Further, a heat exchanger 66 is provided in the second supply oil passage 44, and by cooling the lubricating oil 48 and supplying it to the first motor generator MG1 and the second motor generator MG2, the first motor generator MG1 and The second motor generator MG2 is cooled to prevent overheating. The heat exchanger 66 is an oil cooler that cools the lubricating oil 48 by heat exchange by, for example, air cooling or water cooling.

The details of the lubrication pipe 70 having the first supply oil passage 42 inside will be described with reference to FIGS. 3 and 4.

The lubrication pipe 70 is separate from the case 14. The lubrication pipe 70 is attached to a predetermined position in the case 14 by fixing the plurality of attachment portions 72 included in the lubrication pipe 70 to the inner surface of the case 14 or the outer surface of the case of the first oil pump P1 by fastening bolts 74, respectively. Will be.

The lubrication pipe 70 is made of resin and has a hollow structure that is three-dimensionally bent as a whole. The lubrication pipe 70 includes a plurality of protruding nozzle portions 76, each of which is hollow. Each of the plurality of protruding nozzle portions 76 is provided so as to extend in a straight line in the horizontal direction (vehicle width direction) in parallel with the connecting portion 90. The details of the connecting portion 90 will be described later. The tip portions of the plurality of projecting nozzle portions 76 are provided with a plurality of projecting ejection portions 78 projecting downward (specifically, downward of the vehicle). Lubricating oil 48 can be supplied to the bearing 62 and the gear 64 through the discharge portion 78 (see FIG. 2). When a flat discharge port having no thickness for discharging the lubricating oil 48 is directly provided on the plurality of protruding nozzle portions 76, the lubricating oil 48 can be transmitted to the area around the discharge port or the side portion of the discharge port without directly lowering the lubricating oil 48. However, by providing the protruding discharge portion 78, it is possible to prevent the lubricating oil 48 from being transmitted to this portion.

As shown in FIG. 4, the lubrication pipe 70 includes a plurality of divided parts made of resin divided into two parts. Specifically, the lubrication pipe 70 includes three divided parts, a base divided part 100, a first divided part 102, and a second divided part 104. The base split component 100 is arranged between the first split component 102 and the second split component 104, and the first split component 102 and the second split component 104 are joined (specifically, welded) to the base split component 100, respectively. As a result, the first supply oil passage 42 is provided inside the lubrication pipe 70. That is, the lubrication pipe 70 is divided into two in the circumferential direction of the opening peripheral portion along the path of the first supply oil passage 42.

The base division component 100 will be described. The base split component 100 includes a pair of first half splits 114 and second half splits 116 that open in different directions. The first half split portion 114 is provided with a first base groove portion 110. The second half split portion 116 is provided with a second base groove portion 112. The opening direction of the first base groove portion 110 is the same as the direction of the divided surface 114f of the first half split portion 114. In addition, in FIG. 6, the division surface 114f is shown by the diagonal line of the opening peripheral edge portion of the first base groove portion 110. On the other hand, the opening direction of the second base groove portion 112 is the same as the direction of the divided surface (not shown) of the second half split portion 116. That is, the first base groove portion 110 and the second base groove portion 112 are provided so as to open in opposite directions in the straight line direction which is the vehicle width direction, and the first half split portion 114 and the second half split portion 116 are provided. They are separated from each other so as to be offset in the straight direction.

Specifically, in FIG. 4, with respect to the second half split portion 116 provided with the second base groove portion 112 opening to the left in the vehicle width direction, the right direction in the vehicle width direction opposite to the opening direction. The first half split portion 114 is separated from the second half split portion 116 so as to be offset to. The upper end portion of the first half split portion 114 and the lower end portion of the second half split portion 116 are integrally connected via a connecting portion 90 parallel to the linear direction in the vehicle width direction. The first half-split portion 114 and the second half-split portion 116 extend from the connecting portion 90 in different directions from each other.

The connecting passage portion 88 of the connecting portion 90 is open to the bottom of the first base groove portion 110 and the second base groove portion 112, respectively. A connection port 92 is integrally provided at the lower end of the first half-split portion 114 on the side opposite to the opening side of the first base groove portion 110 so as to extend in a straight line in parallel with the connecting portion 90. On the side of the second half split portion 116 opposite to the opening side of the second base groove portion 112, a plurality of protruding nozzle portions 76 are integrally provided so as to extend in a straight line in parallel with the connecting portion 90.

The first divided component 102 will be described. The first divided component 102 includes a first groove portion 118 constituting a first passage portion 80 between the first divided component 102 and the first half split portion 114 of the base divided component 100. The first division component 102 is in a state where the division surface (not shown) of the opening peripheral portion of the first groove portion 118 faces the division surface 114f of the opening peripheral portion of the first base groove portion 110 of the first half split portion 114. It is joined to the 1-half split portion 114. The first passage portion 80 is configured by the first base groove portion 110 and the first groove portion 118. The opening direction of the first groove portion 118 is the same as the direction of the division surface (not shown) of the first division component 102, and the division surface of the first division component 102 is brought into close contact with the division surface 114f of the first half division 114. You can face each other as you do.

The second divided component 104 will be described. The second divided component 104 includes a second groove portion 120 that constitutes a second passage portion 84 between the second divided component 104 and the second half portion 116 of the base divided component 100. The split surface 104f of the opening peripheral edge portion of the second groove portion 120 faces the split surface (not shown) of the opening peripheral edge portion of the second base groove portion 112 of the second half split portion 116 on the second half split portion 116. Be joined. The second passage portion 84 is configured by the second base groove portion 112 and the second groove portion 120.

The opening direction of the second groove portion 120 is the same as the direction of the division surface 104f of the second division component 104. In addition, in FIG. 4, the division surface 104f is shown by the diagonal line of the opening peripheral edge portion of the second groove portion 120. The split surface 104f of the second split component 104 can be opposed to the split surface of the second half split portion 116 so as to be in close contact with the split surface. On the side opposite to the opening side of the second groove portion 120 of the second divided component 104, a plurality of protruding nozzle portions 76 are integrally extended so as to extend in a straight line in the vehicle width direction opposite to the opening direction of the second groove portion 120. It is provided.

The details of the protruding nozzle portion 76 will be described with reference to FIGS. 5A and 5B. Note that, in FIGS. 5A and 5B, the details of the protruding nozzle portion 76 surrounded by the broken line frame AR1 shown in FIG. 4 will be described as an example, but the same is basically true for the remaining protruding nozzle portion 76. Therefore, a detailed description will be omitted. Further, in FIG. 5B, a portion surrounded by the broken line frame AR2 shown in FIG. 5A is shown.

As shown in FIG. 5A, the protruding nozzle portion 76 has two discharge portions 78 internally provided with a through hole 78A through which the lubricating oil 48 flows, as well as a reinforcing portion for reinforcing the protruding nozzle portion 76. The upper rib 77 and the lower rib 79 are integrally molded. The upper rib 77 is provided on the upper side of the vehicle, which is opposite to the lower side of the vehicle on which the discharge portion 78 is provided, based on the protruding nozzle portion 76. The lower rib 79 is provided on the lower side of the vehicle where the discharge portion 78 is provided, along with the discharge portion 78, at a distance. As described above, by providing the upper rib 77 and the lower rib 79 so as to face each other with the protruding nozzle portion 76 as the center, the ribs are provided as compared with the case where only the upper rib 77 is provided without the lower rib 79, for example. The balance can be ensured.

Further, since the protruding nozzle portion 76 is pulled toward the upper side of the vehicle by the upper rib 77, the vibration of the protruding nozzle portion 76 toward the lower side of the vehicle can be reduced. Further, since the protruding nozzle portion 76 is pulled to the lower side of the vehicle by the lower rib 79, the vibration of the protruding nozzle portion 76 to the upper side of the vehicle can be reduced.

Here, the upper rib 77 extends along the protruding nozzle portion 76 to the root of the second half split portion 116 and is integrally formed with the second half split portion 116. Further, the lower rib 79 that is not sandwiched between the two discharge portions 78 also extends along the protruding nozzle portion 76 to the root of the second half split portion 116 and is integrally molded with the second half split portion 116. There is. As a result, the strength of the base of the protruding nozzle portion 76 is also improved as compared with the case where only the upper rib 77 is formed without forming the lower rib 79, for example.

As shown in FIG. 5B, the shape of the discharge portion 78 is the same as the shape of the lower rib 79, and specifically, both the shape of the discharge portion 78 and the shape of the lower rib 79 have the same height (or thickness). It also contains a rectangular parallelepiped of width. Details will be described later, but as described above, since the shape of the discharge portion 78 and the shape of the lower rib 79 are common, the shape of the discharge portion 78 and the shape of the lower rib 79 are different from those of the discharge portion 78. The lower ribs 79 can be molded together. Although a rectangular parallelepiped has been described as an example of the shapes of the discharge portion 78 and the lower rib 79, if the shape of the discharge portion 78 and the shape of the lower rib 79 are common, the shapes of the discharge portion 78 and the lower rib 79 are cubic bodies. It may be present, or the radial cross sections of the discharge portion 78 and the lower rib 79 may all have a trapezoidal shape, a fan shape, or a tapered shape.

The molding of the base split component 100 will be described with reference to FIG. Since the first divided part 102 having no protruding nozzle portion 76 and the second divided part 104 having the protruding nozzle portion 76 can be basically molded in the same manner as the base divided part 100, detailed description thereof will be omitted. do.

As shown in FIG. 6, the base split component 100 can be integrally molded by injection molding by a molding apparatus 130. The molding apparatus 130 is mainly composed of a fixed molding die 138 which is a lower mold and a movable molding die 140 which is an upper mold. By reciprocating the movable mold 140 in the vertical direction, the movable mold 140 can move closer to or further from the fixed mold 138. The direction in which the movable molding die 140 moves upward is the die cutting direction, and the direction in which the movable molding die 140 moves downward is the mold clamping direction. The die-cutting direction (or die-clamping direction) is a direction parallel to the connecting portion 90, the protruding nozzle portion 76, and the connecting port 92, which are parallel to each other.

The movable mold 140 has a built-in slide mold 139, which is a mold. The slide mold 139 moves in conjunction with the movable molding mold 140 via a cam or the like. When the movable molding die 140 moves in the die cutting direction, the slide die 139 moves to the right side of FIG. 6 at right angles to the die cutting direction. When the movable mold 140 moves in the mold clamping direction, the slide mold 139 moves to the left side in FIG. 6 at right angles to the mold clamping direction.

By moving the movable molding die 140 downward to perform mold clamping, a cavity (molding space) having a molding portion 132 of the connection port 92, a molding portion 134 of the connecting portion 90, and a molding portion 136 of a plurality of protruding nozzle portions 76. ) 142 is configured. By injecting a molten resin material into the cavity 142 to cool and cure it, a connecting portion 90 having a connecting passage portion 88, a hollow protruding nozzle portion 76, a cylindrical connecting port 92, a first base groove portion 110, and a first base groove portion 110. 2 The base dividing component 100 having the base groove portion 112 is integrally molded.

The discharge portion 78 and the lower rib 79 in the protruding nozzle portion 76 are integrally molded at the same time as the molding of the base split component 100 by moving the slide mold 139 in the left-right direction and the like in FIG. 6 in conjunction with the movable molding mold 140. Will be done. Here, when the shape of the discharge portion 78 is different from the shape of the lower rib 79, for example, the shape of the discharge portion 78 is a cylinder and the shape of the lower rib 79 is a rectangular parallelepiped, for example, the shape of the slide type 139. In addition to the lower rib 79 that can be molded by .. Since this work takes time, the cycle time for die cutting increases. Further, since the cast-out pin is housed in the recess of the slide die 139, the die-cutting structure is complicated.

However, according to the present embodiment, when the shape of the discharge portion 78 and the shape of the lower rib 79 are common, for example, a rectangular parallelepiped, the through hole 78A is formed by the shape of the slide type 139 without using a cast pin. The two discharge portions 78 provided inside can be formed at the same time as the lower rib 79. For example, by integrally providing two protrusions 139A capable of forming the through hole 78A on the forming surface of the slide type 139, these two ejection portions 78 can be formed. As described above, according to the present embodiment, the work of accommodating the cast-out pin does not occur as compared with the case of using the cast-out pin, so that the cycle time of die-cutting can be reduced. Moreover, since the casting pin is not used, the die-cutting structure is simplified.

It should be noted that, instead of simultaneously molding the two discharge portions 78 and the lower ribs 79 that are separated from each other, one lower rib 79 having a through hole 78A provided at a position corresponding to the two discharge portions 78 is formed and molded. Two ejection portions 78 may be formed from one lower rib 79 by cutting in a later post-processing. In this case, a portion located between one lower rib 79 and two through holes 78A, and a portion located between the second half split portion 116 and the through hole 78A closer to the second half split portion 116. Can be formed into two discharge portions 78 by removing the above by cutting. In the case of cutting, for example, the generation of burrs can be suppressed as compared with the simultaneous molding of the discharge portion 78 and the lower rib 79, but in the case of simultaneous molding, the slide type 139 is included as compared with the cutting. In some cases, the cost of making the mold is low.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiment, and various modifications and variations are made within the scope of the gist of the present invention described in the claims. It can be changed. For example, in the above-described embodiment, the example in which the two ejection portions 78 are provided for one protruding nozzle portion 76 has been described, but one ejection portion 78 may be provided for one protruding nozzle portion 76. Three or more discharge portions 78 may be provided.

12 Transaxle 48 Lubricating oil 70 Lubricating pipe 76 Protruding nozzle part 78 Discharging part 79 Lower rib (reinforcing part)

The lubricating pipe according to the present invention is a lubricating pipe having a protruding discharge portion for discharging lubricating oil, and the shape and height of the discharge portion are provided side by side with the discharge portion and separated from each other. It has the same shape and height as the reinforcing part integrally molded on the pipe.
The lubricating pipe according to the present invention is a lubricating pipe in which a nozzle portion having a protruding discharge portion for discharging lubricating oil is extended, and is provided alongside the discharge portion at a distance and along the nozzle portion. A first reinforcing portion integrally formed with the lubricating pipe and a first reinforcing portion provided on the opposite side of the first reinforcing portion with reference to the nozzle portion, and integrally molded with the lubricating pipe along the nozzle portion. Includes a second reinforcement.

12 Transaxle 48 Lubricating oil 70 Lubricating pipe 76 Protruding nozzle
77 Upper rib (second reinforcement part)
78 Discharge part 79 Lower rib (reinforcing part , first reinforcing part )

Claims (1)

A lubricating pipe having a protruding discharge portion that discharges lubricating oil.
The shape and height of the discharge portion are common to the shape and height of the reinforcing portion that is provided side by side with the discharge portion and is separated from each other and integrally formed with the lubrication pipe.
Lubricating pipe characterized by that.

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