JP2016089756A - Oil catch tank for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent discharge of impurities from an exhaust part and to suppress leakage of a discharge noise to the outside without extending the exhaust part long upward.SOLUTION: A flow force of a mixture flowing into an in-filter space 30 from an inflow part 14 is mitigated by a pressure mitigation material 25, and the mixture is separated into a gas and impurities, and flows out from through-holes 29. The impurities separated from the mixture are stored at a bottom part 46 of an in-tank space 22, and the gas separated from the mixture is exhausted to the outside from an exhaust part 15. The exhaust part 15 has: an exhaust port 52 formed at a tank body 11 and opening upward; and a duct part 54 for forming an exhaust passage 53. The exhaust passage 53 bends in an inverted U-shape from the exhaust port 52, and opens downward at a blowout port 55.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an oil catch tank for a vehicle that separates a mixture ejected from an air dryer into impurities and discharged air.

  Patent Document 1 describes an oil catch tank including a casing, an inflow portion, an exhaust portion, a pressure relaxing means, and a partition plate. The inflow portion is provided above the casing and connected to the air dryer. The exhaust section has a chimney shape and is provided above the casing and exhausts discharge air ejected from an air dryer to the atmosphere. The pressure relaxing means is housed in the casing and relieves the momentum of the flow by circulating a mixture of the impurity and the discharge air flowing in from the inflow portion. The partition plate is housed in the casing and partitions the casing internal space into an upper layer portion and a lower layer portion. The upper layer portion of the pressure relaxing means is connected so as not to be discontinuous with the inflow portion, and the mixture flows into the pressure relaxing means without leaking.

  The mixture of the impurity material ejected from the air dryer and the discharge air enters the oil catch tank through the inflow portion, and flows down the pressure relaxing means from the top to the bottom. At that time, the momentum of the mixture is decelerated by the pressure relaxation means, and the discharged air is separated from the impurities, exits the pressure relaxation means, and is exhausted from the exhaust section to the atmosphere through the upper layer of the oil catch tank. The On the other hand, since the specific gravity is large, the impurities flow down below the pressure relaxation means and accumulate in the lower layer portion of the oil catch tank.

  A roof part is provided above the exhaust part so that the exhaust part cannot be seen from above, and entry of rain or the like from the outside into the exhaust part is avoided by the roof part.

Japanese Patent No. 5557214

  In the oil catch tank of Patent Document 1, when the amount of accumulated impurity in the oil catch tank increases and the liquid level of the impurity rises, it is accumulated due to the pressure of the discharge air flowing from the air dryer or the vibration of the vehicle. There is a possibility that the impurities are highly splashed and reach the exhaust section. The roof part provided in the exhaust part is not intended to prevent the discharge of impurities from the oil catch tank to the outside. There is a risk of jumping out from the horizontal direction. Such an inconvenience can also be eliminated by extending the exhaust part upward. However, since the oil catch tank is disposed below the air dryer, the tank mounting area on the vehicle body side where the oil catch tank is disposed is likely to be restricted in the height direction, and the exhaust part cannot be extended long upward. There is a case.

  In addition, if the exhaust part is formed short due to the restriction in the height direction of the tank mounting area on the vehicle body side, the discharge sound when the mixture is discharged from the air dryer into the oil catch tank tends to leak to the outside. It is difficult to shorten the exhaust part.

  Therefore, the present invention provides an oil catch tank for a vehicle that can prevent discharge of impurities from the exhaust part and suppress leakage of discharge sound to the outside without extending the exhaust part long upward. Objective.

  In order to achieve the above object, the present invention is arranged below an air dryer that ejects an impurity captured from pressurized air as a mixture with discharge air, and separates the mixture ejected from the air dryer into an impurity and discharge air. An oil catch tank for a vehicle that includes a tank body, a filter, an inflow portion, and an exhaust portion.

  The tank body defines a space in the tank inside and is fixed to the vehicle body side. The filter has a cylindrical body and a pressure relaxation material, and is disposed in the tank internal space. The cylindrical body divides the filter inner space inward by a peripheral surface portion in which a plurality of through holes are formed. The pressure relaxation material is accommodated in the filter inner space. The inflow portion is provided in the tank main body, communicates the filter inner space with the outside of the tank main body, and allows the mixture ejected by the air dryer to flow into the filter inner space. The exhaust part is provided in the upper part of the tank body, and communicates the space in the tank and the outside of the tank body.

  The mixture flowing into the filter inner space from the inflow portion is relaxed by the pressure relaxation material, separated into gas and impurities, and flows out from the through hole. The impurity separated from the mixture is stored at the bottom of the space in the tank, and the gas separated from the mixture is discharged from the exhaust part to the outside.

  The exhaust part has an exhaust port that is formed in the tank body and opens upward, and a duct part that forms an exhaust passage that is bent in a reverse U shape from the exhaust port and opens downward.

  In the above configuration, the exhaust passage of the exhaust part is bent in an inverted U shape from the exhaust port that opens upward and opens downward. For this reason, the amount of impurities accumulated in the space in the tank increases, and the impurity level rises due to the pressure of the discharge air flowing in from the air dryer or the vibration of the vehicle, etc. Even if it reaches, the impurity is difficult to jump out from the exhaust part. Further, since the exhaust passage opens downward, the discharge sound when the mixture is discharged from the air dryer into the oil catch tank is difficult to leak to the outside. Therefore, it is possible to prevent the discharge of impurities from the exhaust part and suppress the discharge of the discharge sound to the outside without extending the exhaust part upward.

  Moreover, you may set the downward opening of an exhaust passage in the position lower than an exhaust port.

  In the above configuration, since the exhaust passage opens downward at a position lower than the exhaust port, the effect of preventing discharge of impurities from the exhaust part and the effect of suppressing leakage of discharge sound to the outside are improved.

  In addition, the filter may be fixed to the tank body in a posture in which the axis of the cylindrical body intersects with the vertical direction in an attached state where the tank body is fixed to the vehicle body side.

  In the above configuration, the tank body is fixed to the vehicle body side in such a posture that the shaft center of the filter intersects the vertical direction. Thus, since the tank body is fixed to the vehicle body side in a horizontally long posture (so-called landscape orientation), the height of the tank body increases or decreases according to the outer diameter of the filter. For this reason, compared with the case where the tank body is fixed to the vehicle body side in a posture in which the axis of the filter is along the vertical direction (so-called vertical posture), it is possible to flexibly cope with the restriction in the height direction. Therefore, the oil catch tank can be arranged even in the tank mounting region on the vehicle body side where the height direction is severely restricted.

  According to the oil catch tank of the present invention, it is possible to prevent discharge of impurities from the exhaust part and to suppress leakage of discharge sound to the outside without extending the exhaust part upward.

It is a lineblock diagram showing typically the system provided with the oil catch tank concerning one embodiment of the present invention. It is a side view of the oil catch tank of this embodiment. It is a front view of the oil catch tank of FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3. It is a top view of the oil catch tank of FIG. It is VI-VI arrow sectional drawing of FIG. It is sectional drawing which shows the modification of an exhaust part, (a) shows a 1st modification, (b) shows a 2nd modification, respectively.

  Hereinafter, an oil catch tank 10 according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the oil catch tank 10 constitutes an air system that removes impurities from the pressurized air that the air compressor 1 supplies to the air tank 4 together with the air dryer 2. The air compressor 1, the air tank 4, the air dryer 2, and the oil catch tank 10 are fixed to the vehicle body side. The air compressor 1 is driven by an engine (not shown) and supplies pressurized air to the air tank 4 via an air supply pipe 3. The oil catch tank 10 is connected to the air dryer 2 by a connecting pipe 5.

  The air dryer 2 is provided in the middle of the air supply pipe 3. In the air dryer 2, an oil filter, a drain valve, a governor part, a desiccant and the like are provided (all not shown). The pressurized air flowing into the air dryer 2 from the air compressor 1 is supplied to the air tank 4 after removing impurities such as oil mist by passing through the oil filter and removing moisture by passing through the desiccant. The When the air pressure of the air system or the air tank 4 reaches a predetermined high specified pressure, the governor part is activated, the drain valve is opened, and the impurities and moisture temporarily captured by the oil filter are integrated with the discharge air. It flows out to the downstream connecting pipe 5 as a stagnant mixture. As described above, the air dryer 2 removes impurities from the pressurized air and supplies the air to the air tank 4 and ejects the impurity trapped from the pressurized air as a mixture with the discharge air.

  The oil catch tank 10 is disposed below the air dryer 2 and separates the mixture ejected from the air dryer 2 into impurities and discharged air (gas).

  As shown in FIGS. 2 to 6, the oil catch tank 10 includes a tank main body 11, a filter 12, a partition plate 13, an inflow portion 14, an exhaust portion 15, an indicator portion 16, and a drain discharge portion 17. Fixed in place. Hereinafter, the oil catch tank 10 in an attached state fixed to the vehicle body side will be described.

  The tank body 11 has a bottomed cylindrical case body 18 that opens on one side (right side in FIG. 4), and a lid body 19 that closes the opening of the case body 18. The case body 18 is fixed to the lid body 19 by a plurality of bolts 20 and nuts 21, and the case body 18 and the lid body 19 define a tank internal space 22 inside the tank body 11. A tank mounting piece 23 projects from the upper portion of the case body 18, and the oil catch tank 10 is fixed to the vehicle body side by fastening and fixing the tank mounting piece 23 to the bracket 7 of the vehicle body frame 6.

  As shown in FIG. 4, the inflow part 14 includes a connection pipe part 33 to which the connection pipe 5 (see FIG. 1) is connected, and an introduction pipe part 34 that communicates with the connection pipe part 33 and protrudes into the tank internal space 22. And is integrally formed on a vertical wall portion (side wall portion on one side of the tank body 11) 35 of the lid body 19. The connection pipe portion 33 and the introduction pipe portion 34 form a mixture inflow path 58 that communicates the outside of the tank body 11 and the tank internal space 22.

  The filter 12 includes a cylindrical body 24, a pressure relaxation material 25, a one side closing plate 26 and another side closing plate 27, and is disposed in the tank inner space 22. The cylindrical body 24 has a cylindrical shape in which both ends on one side and the other side (left side in FIG. 4) are open. A plurality of through holes 29 are formed in the peripheral surface portion 28 of the cylindrical body 24, and a filter inner space 30 is partitioned by the peripheral surface portion 28 inside the cylindrical body 24. The pressure relaxation material 25 is accommodated in the filter inner space 30. The pressure relaxation material 25 may be any material that can relieve the momentum of the flow of the mixture flowing in at a high pressure. For example, wool in which a fine ventilation hole is formed by rolling a fibrous metal material or a synthetic resin material. A structure, a laminated body in which sheet-like materials having a mesh structure are stacked, a resin sponge body having continuous pores, or the like is used.

  The one-side closing plate 26 and the other-side closing plate 27 have a disk shape in which supported holes 31 and 32 are formed, and close the openings at one end and the other end of the cylindrical body 24, respectively. The introduction pipe portion 33 of the inflow portion 14 is inserted into the supported hole 31 of the one side closing plate 26 from one side, and the one side closing plate 26 is supported by the introduction pipe portion 33. A filter support member 37 that is fastened and fixed to a vertical wall portion (side wall portion on the other side of the tank body 11) 36 of the case body 18 is inserted into the supported hole 32 of the other side closing plate 27 from the other side to support the filter. The other side closing plate 27 is supported by the member 37. By fastening and fixing the filter support member 37 to the case body 18, the cylindrical body 24 is sandwiched between the one side closing plate 26 and the other side closing plate 27, and the filter 12 is fixed to the tank body 11 in a predetermined posture. The In this predetermined posture, the axial center (cylindrical axial center) 70 of the cylindrical body 24 extends substantially horizontally and substantially perpendicular to the vertical direction.

  The mixture inflow path 58 of the inflow portion 14 is connected to the air dryer 2 through the one-side closing plate 26 to communicate the filter inner space 30 and the outside of the tank body 11. The mixture ejected from the air dryer 2 flows into the filter inner space 30 from the mixture inflow path 58 (see arrow 71 in FIG. 4), and the momentum of the flow is relieved by the pressure relieving material 25 and separated into discharge air and impurities. And flows out from the through hole 29. Impurities that have flowed out of the through holes 29 are stored in the bottom 46 of the tank internal space 22 (see arrow 72 in FIG. 4), and the discharge air that has flowed out of the through holes 29 is discharged from the exhaust section 15 to the outside (atmosphere). (See arrow 73 in FIG. 4).

  A filter cover 38 that covers the other side of the filter 12 is provided on the other side of the tank internal space 22. The filter cover 38 is integrally provided with an extension plate 39 extending linearly in a horizontal direction between one side and the other side of the tank inner space 22 below the filter 12. The extension plate 39 has a narrow flat plate shape substantially perpendicular to the vertical direction, and a part of the extension plate 39 covers the other side of the filter 12 together with the filter cover 38. One end of the extension plate 39 is bent downward and fastened and fixed to the lid body 19. The filter cover 38 has a peripheral surface portion 40 that covers the outer peripheral surface of the filter 12 (cylindrical body 24), and a side surface portion 41 that covers the other end surface (other side closing plate 27) of the filter 12. A supported hole 42 is formed in the side surface portion 41, and a filter support member 37 is inserted into the supported hole 42 from the other side. The filter support member 37 includes a small-diameter portion 43 through which the supported holes 32 and 42 are inserted, a large-diameter portion 44 that expands in a step shape from the other end of the small-diameter portion 43, and a bolt that projects from the other end of the large-diameter portion 44. It has the part 45 integrally. A bolt insertion hole 47 through which the bolt portion 45 is inserted is formed in the vertical wall portion 36 of the case body 18.

  Before the case body 18 is assembled to the lid body 19, the introduction pipe portion 33 is inserted into the supported hole 31 of the one side closing plate 26, and the cylindrical body 24 is interposed between the one side closing plate 26 and the other side closing plate 27. The filter 12 and the filter cover 38 are temporarily held by the lid 19 by overlapping the side surface 41 of the filter cover 38 on the other side closing plate 27 and fastening one end of the extension plate 39 to the lid 19. The In this state, the small diameter portion 43 of the filter support member 37 is inserted into the supported holes 32 and 42 of the filter cover 38 and the other side closing plate 27, the case body 18 is assembled to the lid body 19, and the bolt insertion hole of the case body 18 The filter 12 and the filter cover 38 are fixed to the tank main body 11 by inserting the bolt portion 45 of the filter support member 37 into 47 and screwing and tightening the nut 48 to the bolt portion 45 protruding to the outside of the case body 18. The In this state, the filter cover 38 is separated from the inner surface of the case body 18 and the outer surface of the filter 12.

  The partition plate 13 is fixed to the lower surface of the extension plate 39 of the filter cover 38 and partitions the tank inner space 22 into an upper tank upper space 49 and a lower tank lower space 50. The partition plate 13 is a non-perforated plate that does not have a hole for communicating the tank upper space 49 and the tank lower space 50, and the tank upper space 49 and the tank lower space between the inner surface of the tank body 11. A gap 51 that communicates with 50 is formed (see FIG. 6). The partition plate 13 of the present embodiment is a metal flat plate disposed substantially horizontally so as to be substantially orthogonal to the vertical direction. Impurities that have flowed out of the filter 12 (through hole 29) above the partition plate 13 drop into the partition plate 13, flow down from the gap 51 to the tank lower space 50, and the tank space 22 (tank lower space 50). At the bottom 46). In addition, the partition plate 13 may be inclined with respect to the horizontal direction, and may be bent or curved so that the periphery is lower than the center.

  The exhaust unit 15 is provided on the other side of the tank body 11 (the other side of the case body 18), and communicates the tank upper space 49 with the outside of the tank body 11. The exhaust portion 15 includes an exhaust port 52 formed in the case body 18 and opening upward, and a duct portion 54 that forms an exhaust passage 53 that bends in an inverted U shape from the exhaust port 52 and opens downward. The filter cover 38 is disposed between the filter 12 and the exhaust port 52, and the exhaust port 52 is shielded from the filter 12 by the filter cover 38. The duct portion 54 is provided along the upper corner portion of the other end of the case body 18, and forms an exhaust passage 53 between the case body 18 and downward with the vertical wall portion 36 of the case body 18. An opening (opening downward of the exhaust passage 53) 55 is formed. The blower outlet 55 is set at a position lower than the exhaust outlet 52.

  The drain discharge part 17 includes a drain discharge path 56 that communicates the lower tank inner space 50 and the outside of the tank body 11 at the lower part of the lid 19, and a drain cock 57 that can open and close the drain discharge path 56. By opening the drain cock 57 at the time of maintenance inspection or the like, the impurities accumulated on the bottom 46 of the tank inner space 22 can be discharged from the drain discharge path 56 to a container or the like for processing.

  As shown in FIGS. 2 and 3, the indicator part 16 has an indicator pipe part 59 that extends in the vertical direction outside the lid 19 and communicates the bottom part 46 (see FIG. 4) and the upper part of the tank internal space 22. . The indicator pipe part 59 is formed of a transparent or translucent resin or the like that can visually recognize the liquid level inside from the outside, and is deposited on the bottom 46 of the tank internal space 22 by visually checking the liquid level in the indicator pipe part 59. It is possible to grasp the amount of accumulated impurity.

  According to the present embodiment, the exhaust passage 53 of the exhaust unit 15 is bent in a reverse U shape from the exhaust port 52 that opens upward, and opens downward at the air outlet 55. For this reason, the amount of impurities stored in the tank internal space 22 increases, and the impurity level rises and rises due to the pressure of the discharge air flowing from the air dryer 2 or the vibration of the vehicle while the level of the impurities is raised. Even when it reaches the portion 15 (exhaust port 52), the impurities are unlikely to jump out of the exhaust portion 15 (blower 55). Further, since the exhaust passage 53 opens downward at the air outlet 55, the discharge sound when the mixture is discharged from the air dryer 2 into the oil catch tank 10 is difficult to leak to the outside. Therefore, it is possible to prevent the discharge of the impurity from the exhaust part 15 and to suppress the leakage of the discharge sound to the outside in a state where the exhaust part 15 is shortened without extending the exhaust part 15 upward.

  Moreover, since the blower outlet 55 is set at a position lower than the exhaust port 52, the effect of preventing the discharge of impurities from the exhaust part 15 and the effect of suppressing the leakage of discharge sound to the outside are improved. Furthermore, it becomes difficult for water from the outside to enter the exhaust port 52.

  Further, since the filter cover 38 is disposed between the filter 12 and the exhaust port 52, and the exhaust port 52 is shielded from the filter 12 by the filter cover 38, the impurity is transferred from the filter 12 to the exhaust unit 15 (exhaust port 52). Even when it protrudes toward the outside, the filter cover 38 prevents the impurity from moving, so that the impurity is not discharged from the exhaust portion 15 to the outside.

  Further, the tank main body 11 is fixed to the vehicle body side in a posture in which the axis 70 of the filter 12 (tubular body 24) is substantially orthogonal to the vertical direction. In this way, the tank body 11 is fixed to the vehicle body side in a horizontally long posture (so-called horizontal posture), so the height of the tank body 11 is not the length of the filter 12 but the size of the outer diameter of the filter 12. Increase or decrease accordingly. For this reason, compared with the case where the tank body is fixed to the vehicle body in a posture in which the axis 70 of the filter 12 is along the vertical direction (so-called vertical posture), it is possible to flexibly cope with the restriction in the height direction. . Therefore, the oil catch tank 10 can be disposed even in the tank mounting region on the vehicle body side where the height direction is severely restricted.

  As mentioned above, although the embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the discussion and the drawings that form part of the disclosure of the present invention according to this embodiment. That is, it is needless to say that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  For example, as shown in FIG. 7A, the air outlet 55 may be set at substantially the same height as the air outlet 52 (the upper surface of the case body 18). Further, as shown in FIG. 7B, the exhaust passage 53 may be provided with a protrusion 60 that protrudes upward from the upper surface of the case body 18. The protrusion 60 can improve the effect of preventing impurities from being discharged from the exhaust part 15 and the effect of suppressing the leakage of discharged sound to the outside.

  In the above-described embodiment, the so-called horizontal type oil catch tank 10 in which the tank body 11 is fixed to the vehicle body side with the axis 70 of the filter 12 substantially perpendicular to the vertical direction has been described. May be a so-called vertical type oil catch tank in which the tank body is fixed to the vehicle body side in a posture along the vertical direction.

  The oil catch tank of the present invention is widely applicable to vehicles equipped with an air dryer.

DESCRIPTION OF SYMBOLS 1 Air compressor 2 Air dryer 5 Connecting pipe 6 Body frame 7 Bracket 10 Oil catch tank 11 Tank main body 12 Filter 13 Partition plate 14 Inflow part 15 Exhaust part 16 Indicator part 17 Drain discharge part 18 Case body 19 Cover body 22 Tank inner space 24 Cylinder Shaped body 25 Pressure relaxation material 26 One side closing plate 27 Other side closing plate 28 Peripheral surface portion 29 Through hole 30 Filter inner space 38 Filter cover 39 Extension plate 46 Tank inner space bottom 49 Tank upper space 50 Tank lower space 51 Gap 52 Exhaust port 53 Exhaust passage 54 Duct portion 55 Outlet 58 Mixture inflow passage 70 Axle

Claims (2)

An oil catch tank of a vehicle that is connected to an air dryer that ejects an impurity captured from pressurized air as a mixture with discharged air, and that separates the mixture ejected from the air dryer into an impurity and discharged air,
A tank body that divides the space inside the tank and is fixed to the vehicle body side,
A filter that has a cylindrical body that divides the filter inner space inside by a peripheral surface portion in which a plurality of through holes are formed, and a pressure relaxation material that is accommodated in the filter inner space, and is disposed in the tank inner space ,
An inflow part that is provided in the tank body and communicates the space in the filter with the outside of the tank body, and flows the mixture ejected by the air dryer into the space in the filter;
An exhaust part provided at an upper part of the tank body and communicating the space in the tank and the outside of the tank body;
The mixture flowing into the filter inner space from the inflow portion is relaxed by the pressure relaxation material, and is separated into discharge air and impurities and flows out from the through hole,
Impurities separated from the mixture are stored at the bottom of the space in the tank,
The discharge air separated from the mixture is discharged to the outside from the exhaust part,
The exhaust portion has an exhaust port that is formed in the tank body and opens upward, and a duct portion that is bent in a reverse U shape from the exhaust port and forms an exhaust passage that opens downward. Vehicle oil catch tank. The oil catch tank according to claim 1,
The vehicle oil catch tank is characterized in that an opening downward of the exhaust passage is set at a position lower than the exhaust port.

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