JP2015068382A - Wear powder discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wear powder discharge device that can securely discharge wear powder accumulating within a housing.SOLUTION: A wear powder discharge device includes: a wear powder discharge route KR of a multiple disc clutch device 7 that leads from an outside air suction port 60d serving as a first opening opened on a front cover 60 of a housing 600 for housing the multiple disc clutch device 7 through at least either one of the multiple disc clutch device 7 or a clutch drum 6 serving as a support section of the multiple disc clutch device 7 to an outside air discharge port 60e serving as a second opening opened on the front cover 60 of the housing 600; and an outside air introduction route 100 serving as an outside fluid introduction route that enables introduction of air as fluid for forcedly discharging wear powder from outside of the housing 600 to the discharge route KR.

Description

  The present invention relates to a wear powder discharging apparatus that discharges wear powder generated in a clutch such as a dry multi-plate clutch.

2. Description of the Related Art Conventionally, dry multi-plate clutches that can discharge wear powder generated on a clutch plate are known (see, for example, Patent Document 1).
In this prior art, when the multi-plate clutch rotates, a discharge path for discharging wear powder by centrifugal force is formed. That is, the discharge path includes a radial path along the outer diameter side from the inner diameter side of the clutch plate and an axial path along the spline groove of the clutch drum. Therefore, the wear powder moves in the outer diameter direction along the clutch plate and moves in the axial direction along the spline groove of the clutch drum when the clutch plate rotates.

JP 2010-242824 A

  However, since the conventional wear powder discharging device has a structure that discharges only by the centrifugal force acting on the multi-plate clutch, the wear powder may not be discharged sufficiently due to the influence of the driving pattern of the driver. was there.

  The present invention has been made paying attention to the above problems, and an object of the present invention is to provide a wear powder discharging device that can reliably discharge the wear powder of the clutch remaining in the housing.

In order to achieve the above object, the present invention provides:
A path for discharging abrasion powder of the clutch from a first opening opened in the housing housing the clutch to a second opening opened in the housing through at least one of the clutch and its supporting portion; ,
An external fluid introduction path provided so that a fluid for forcibly discharging the wear powder from the outside of the housing can be introduced into the discharge path;
It was set as the abrasion powder discharge device characterized by having.

In the wear powder discharging apparatus of the present invention, by supplying a fluid for forced discharge of wear powder from the outside of the housing to the external fluid introduction path, the wear powder remaining in the discharge path is passed through the discharge path to the second opening. Can be discharged to the outside of the housing.
Therefore, it is possible to reliably discharge the wear powder that is not discharged only by the centrifugal force when the multi-plate clutch rotates by supplying the fluid from the outside of the housing.

It is sectional drawing of the principal part of the hybrid driving force transmission apparatus to which the abrasion powder discharging apparatus of Embodiment 1 is applied. It is principal part sectional drawing which shows the structure of the motor & clutch unit in the said hybrid driving force transmission apparatus. It is a front view which shows the drive plate in the abrasion powder discharging apparatus of Embodiment 1. It is sectional drawing which shows the structure of the principal part of the abrasion powder discharging apparatus of Embodiment 1. It is a schematic block diagram which shows the outline of the principal part of the abrasion powder discharging apparatus of Embodiment 2. 6 is a flowchart showing a flow of display processing in the wear powder discharging apparatus of the second embodiment. It is a schematic block diagram which shows the outline of the principal part of the abrasion powder discharge | emission apparatus of Embodiment 3. 10 is a flowchart showing a flow of wear powder forced discharge processing in the wear powder discharging apparatus of the third embodiment.

Hereinafter, the form for implementing the abrasion powder discharging apparatus of this invention is demonstrated based on embodiment shown to drawing.
(Embodiment 1)
First, the configuration of the hybrid driving force transmission device including the abrasion powder discharging device of the first embodiment will be described.
[overall structure]
FIG. 1 is an overall schematic diagram showing a hybrid driving force transmission device. The overall configuration of the apparatus will be described below with reference to FIG.
As shown in FIG. 1, the hybrid driving force transmission device includes an engine Eng, a motor & clutch unit M / C, a transmission unit T / M, an engine output shaft 1, a clutch hub shaft 2, and a clutch hub 3. A clutch drum shaft 4, a transmission input shaft 5, a clutch drum 6, a dry multi-plate clutch device 7, a slave cylinder 8, and a motor / generator 9.
The slave cylinder 8 that hydraulically controls the engagement / release of the multi-plate clutch device 7 is generally called “CSC (abbreviation of Concentric Slave Cylinder)”.

  When the multi-plate clutch device 7 that is normally open is released, the hybrid driving force transmission device connects the motor / generator 9 and the transmission input shaft 5 via the clutch drum 6 and the clutch drum shaft 4. "Running mode". When the multi-plate clutch device 7 is hydraulically engaged by the slave cylinder 8, the clutch hub 3 and the clutch drum 6 are connected via the multi-plate clutch device 7. As a result, the engine output shaft 1 and the clutch hub shaft 2 are connected via the damper 21, and a “hybrid vehicle travel mode” is established in which the engine Eng and the motor / generator 9 are connected.

The motor & clutch unit M / C provided with the multi-plate clutch device 7 includes a slave cylinder 8 and a motor / generator 9 in addition to the multi-plate clutch device 7.
The slave cylinder 8 hydraulically controls the engagement / release of the multi-plate clutch device 7.
The motor / generator 9 is arranged at the outer peripheral position of the clutch drum 6 of the multi-plate clutch device 7 and transmits power to the transmission input shaft 5.

The motor / generator 9 is a synchronous AC motor and includes a rotor support frame 91, a motor rotor 92, a stator 94, and a stator coil 95.
The rotor support frame 91 is integrally coupled to the outer periphery of a clutch drum 6 described later.
The motor rotor 92 is supported and fixed to the rotor support frame 91 and has permanent magnets embedded therein.
The stator 94 is disposed on the motor rotor 92 via the air gap 93 and is fixed to the cylinder housing 81.
The stator coil 95 is wound around the stator 94.
The cylinder housing 81 is formed with a water jacket 96 for circulating cooling water.

The transmission unit T / M is connected to the motor & clutch unit M / C and includes a transmission housing 41, a V-belt continuously variable transmission mechanism 42, and an oil pump O / P.
The oil pump O / P drives the pump by transmitting the rotational drive torque of the transmission input shaft 5 via the chain drive mechanism.
One or more of the plurality of clutches (not shown) provided in the transmission unit T / M cannot transmit the rotation of the motor / generator 9 to the drive wheels (not shown). It functions as a second clutch that can be switched to a disconnected state.

[Configuration of motor & clutch unit]
FIG. 2 is a cross-sectional view of the main part showing the configuration of the motor & clutch unit M / C provided with the multi-plate clutch device 7 of the first embodiment. Hereinafter, the motor & clutch unit M / C of FIG. The configuration will be described.

  The clutch hub 3 is connected to the engine output shaft 1 (see FIG. 1) via the clutch hub shaft 2. The clutch hub 3 holds the drive plate 71 of the multi-plate clutch device 7 by spline connection.

The clutch drum 6 is connected to the transmission input shaft 5 of the transmission unit T / M (see FIG. 1) via the clutch drum shaft 4.
The clutch drum 6 is formed with a communication path 63 extending in the axial direction. The communication path 63 has an opening 63a at the end in the axial direction on the right side in the drawing.
A spline 621 is formed on the inner periphery of the clutch drum 6. In the spline groove portion 622 disposed between the splines 621 in the circumferential direction, a communication hole 623 that communicates with the inner periphery of the clutch drum 6 and the communication passage 63 is formed in the radial direction.

Next, the multi-plate clutch device 7 will be described.
The multi-plate clutch device 7 is a clutch that connects and disconnects transmission of driving force from the engine Eng, and is a sealed space surrounded by the clutch hub shaft 2, the clutch hub 3, the clutch drum 6, and the front cover (housing) 60. It arrange | positions in the clutch chamber 60c. By engaging the multi-plate clutch device 7, torque can be transmitted between the clutch hub 3 and the clutch drum 6, and by releasing the multi-plate clutch device 7, the torque between the clutch hub 3 and the clutch drum 6 can be transmitted. Block transmission.

The multi-plate clutch device 7 includes a drive plate 71, a driven plate 72, and a friction facing 73.
The drive plate 71 is spline-coupled to the clutch hub 3, and has a vent hole 74 through which the airflow flowing in the axial direction passes through the spline-coupled portion with the clutch hub 3. As shown in FIG. 3, the vent hole 74 is a position of a spline tooth protrusion 75 projecting toward the inner diameter side among spline teeth meshing with the spline part of the clutch hub 3 in the drive plate 71, and facing the facing of the friction facing 73. It is provided inside the groove 76. As shown in FIG. 2, the drive plate 71 is set such that a plurality of (four in the first embodiment) vent holes 74 communicate in the axial direction.

The driven plate 72 is splined to a spline 621 formed on the inner periphery of the clutch drum 6.
The driven plate 72 has a ring shape when viewed from the axial direction, and a tooth portion formed on the outer periphery of the driven plate 72 is fitted to the spline 621 so as to rotate integrally with the clutch drum 6. Is provided.

  The friction facings 73 are provided on both surfaces of the drive plate 71, and the friction surface presses against the plate surface of the driven plate 72 when the clutch is engaged. As shown in FIG. 3, the friction facing 73 is an annular plate member, and has a facing groove 76 formed by a radial radial straight line from the inner diameter position toward the outer diameter position. The facing groove 76 has a depth that maintains the concave groove shape even if the facing wear proceeds to some extent.

Returning to FIG. 2, the slave cylinder 8 described above is a hydraulic actuator that controls the engagement and release of the multi-plate clutch device 7, and is positioned between the transmission unit T / M (see FIG. 1) side and the clutch drum 6. Has been placed.
The slave cylinder 8 includes a piston 82, a first clutch pressure oil passage 85, and a cylinder oil chamber 86.
The piston 82 is slidably provided in the cylinder hole 80 of the cylinder housing 81. The first clutch pressure oil passage 85 is formed in the cylinder housing 81 and guides the clutch pressure created by the transmission unit T / M (see FIG. 1). The cylinder oil chamber 86 is communicated with the first clutch pressure oil passage 85.
The piston arm 822b of the piston 82 is disposed through the through hole 61b formed in the vertical wall portion 61a.

Next, the front cover 60 will be described.
The front cover 60 covers the motor & clutch unit M / C from the axial direction, and partitions the motor & clutch unit M / C from the engine Eng and the transmission unit T / M.
The front cover 60 is fixed integrally with a cylinder housing 81 of a stationary member supported by the first bearing 12 with respect to the clutch drum shaft 4, and covers the motor / generator 9 and the multi-plate clutch device 7. That is, the front cover 60 is a stationary member that is supported by the second bearing 13 with respect to the clutch hub shaft 2 and sealed by the cover seal 15, and constitutes a portion that houses the multi-plate clutch device 7 in the housing 600. doing.

The space covered by the housing 600 including the front cover 60 and the cylinder housing 81 is a dry space that blocks oil from entering the motor chamber 60b on the outer diameter side and the inner diameter side of the motor chamber 60b with the dust seal 60a interposed therebetween. It is divided into a clutch chamber 60c.
The clutch chamber 60c is a space on the clutch rotating shaft CL (= rotor shaft) side in the dry space, and houses the multi-plate clutch device 7. The motor chamber 60b houses the motor / generator 9.

[Configuration of wear powder discharge path]
In the clutch chamber 60c, a discharge path KR indicated by a dotted line in the figure for discharging the wear powder generated in the multi-plate clutch device 7 is formed. This discharge path KR is a path from the outside air inlet (first opening) 60d opened in the front cover 60 to the outside air outlet (second opening) 60e. Note that the outside air inlet 60d and the outside air outlet 60e may be installed at a plurality of locations in the circumferential direction, and in this case, a plurality of the discharge paths KR are provided in the circumferential direction.

The outside air intake port 60d is a hole for taking outside air into the clutch chamber 60c by a sealed space, and as shown in FIG. 2, of the front cover 60 disposed on the side surface of the multi-plate clutch device 7, both plates 71 and 72 are provided. It is provided penetrating in the axial direction at a position near the inner diameter.
A specific radial setting position of the outside air inlet 60d is arranged at a position that overlaps with the vent hole 74 of the drive plate 71 in the radial direction, and forms an airflow that flows in the axial direction at the inner peripheral portions of the plates 71 and 72. Are arranged to be.

The outside air discharge port 60e is a hole that is disposed so as to overlap with the outer peripheral portion of both the plates 71 and 72 and the communication path 63 in the radial direction, and discharges wear powder flowing through the discharge path KR to the outside of the housing 600 (clutch chamber 60c). is there.
That is, due to the centrifugal force generated when the multi-plate clutch device 7 rotates, an air flow from the inner diameter direction to the outer diameter direction of each plate 71, 72 is formed as shown by an arrow E in the figure, and each plate 71, 72 While the inner diameter portion of 72 becomes negative pressure, the outer diameter portion becomes positive pressure. Due to this pressure difference, blown air is formed. Then, the air flows along the discharge path KR from the outside air inlet 60d through the inner diameter portions of the plates 71 and 72 in the axial direction, along the plates 71 and 72 in the outer diameter direction, and the spline groove portion 622. And it progresses to an axial direction along the communicating path 63, and reaches the external air discharge port 60e.

  The outside air inlet 60d and the outside air outlet 60e are covered with a splash guard 60f to prevent water from entering the clutch chamber 60c from the outside air inlet 60d and the outside air outlet 60e.

[Configuration of external air (fluid) introduction path]
In the first embodiment, an external air introduction path 100 is formed with respect to the discharge path KR so as to be able to introduce air (fluid) for forcibly discharging wear powder from the outside of the housing 600. As shown in FIG. 4, the external air introduction path 100 is formed in the front cover 60 in the radial direction, and one end in the inner diameter direction is disposed on the same circumference as the outside air inlet 60 d of the discharge path KR. And it is opened in the axial direction toward the clutch chamber 60c. A plurality of openings to the clutch chamber 60c may be provided on the same circumference.
Further, the opening 101 provided at the outer diameter direction end of the external air introduction path 100 is opened at the outer diameter direction end surface of the front cover 60. Such an external air introduction path 100 can be formed in the front cover 60 or formed by casting together with the front cover 60. Alternatively, the external air introduction path 100 can be formed by forming a groove recessed in the axial direction and extending in the radial direction on the end surface of the front cover 60, and arranging a tubular member along the groove.

  Further, the external air introduction path 100 is extended from the housing 600 into the engine room ER by the extension pipe 102. That is, the base end of the extension pipe 102 is connected to the opening 101 of the external air introduction path 100. And the front-end | tip part of this extension pipe 102 is arrange | positioned in the engine room ER in the position (upper position in the engine room ER) where the connection of the air hose 110 which supplies compressed air is easy. Furthermore, a connection jack (connector) 103 is provided at the tip of the extension pipe 102. The connection jack 103 is provided with a cap 104 that can be attached to and detached from the connection jack 103. The opening of the connection jack 103 is closed by the cap 104 except when compressed air is supplied.

The air hose 110 is connected so as to be able to supply high-pressure air from a high-pressure air source provided at a maintenance shop or the like not shown in the figure, and a connection jack 111 for connection is provided at the tip of the connection jack 103. It has been.
Further, when the connection jack 103 and the connection jack 111 are connected, the connection portion of the connection jack 111 is formed in a conical shape, for example, so as to ensure the close contact therebetween and prevent air leakage. .

(Operation of Embodiment 1)
Next, the operation of the first embodiment will be described.
[Abrasion powder discharging action during multi-plate clutch rotation]
When the engagement and release of the multi-plate clutch device 7 are repeated, the surface of the friction facing 73 peels off and falls off, which becomes wear powder and accumulates between the clutch plates 71 and 72. It is necessary to discharge.
When at least one of the clutch hub 3 and the clutch drum 6 rotates about the clutch rotation axis CL, the friction powder moves in the outer diameter direction by the centrifugal force generated by the friction facing 73.

Further, since the friction facing 73 has the facing groove 76, a centrifugal fan effect is generated.
Due to this centrifugal fan effect, air is sent in the radial direction from the clutch hub 3 side to the clutch drum 6 side, the pressure on the clutch drum 6 side increases (positive pressure), and the pressure on the clutch hub 3 side decreases (negative pressure). . Due to this pressure difference, a radial airflow E (see FIG. 2) is generated in which air moves radially from the clutch hub 3 side to the clutch drum 6 side. That is, the pressure on the inner diameter side of the multi-plate clutch device 7 decreases from the atmospheric pressure (negative pressure), and the pressure on the outer diameter side of the multi-plate clutch device 7 increases from the atmospheric pressure (positive pressure). Pressure relationship> atmospheric pressure> clutch inner diameter side pressure ”.

Due to the generation of the radial airflow, an airflow passing through the discharge path KR indicated by the arrow is generated. That is, the outside air taken in from the outside air intake port 60d travels in the axial direction through the air holes 74 and then becomes a radial airflow E that flows to the low pressure clutch hub 3 side, and further passes through the communication path 63 from the communication hole 623. Then, after passing through the outside air discharge port 60e, it is discharged to the outside of the clutch chamber 60c.
As a result of this airflow generation action, the abrasion powder peeled off from the surface of the friction facing 73 is discharged to the outside of the clutch chamber 60c.

[Forced discharge of wear powder]
Although the wear powder generated in the multi-plate clutch device 7 is discharged through the discharge path KR as described above, the wear powder remaining in the clutch chamber 60c may gradually increase over time.
Therefore, in the wear powder discharging apparatus of the first embodiment, the wear powder remaining in the clutch chamber 60c can be forcibly discharged when brought into a service factory or the like.
In this case, the cap 104 of the connection jack 103 of the extension pipe 102 arranged in the engine room ER is removed, and the connection jack 111 of the air hose 110 is connected to the connection jack 103. For example, the air hose 110 is connected to an air gun (not shown) in a service factory, and can supply compressed air from a high-pressure air source in the service factory.

  The compressed air supplied to the extension pipe 102 passes through the external air introduction path 100 routed in the front cover 60 and is blown out in the axial direction from the position having the same diameter as the outside air inlet 60d into the clutch chamber 60c. The compressed air passes through the discharge path KR, passes through the outside air discharge port 60e, and is discharged to the outside of the clutch chamber 60c. A forced discharge path KR2 (shown by a dotted line in FIG. 4), which is an air flow path in this case, is a path that passes from the external air introduction path 100 through the discharge path KR shown in FIG.

At this time, since the air pressure passing through the forced discharge path KR2 is larger than the differential pressure during the rotation of the multi-plate clutch device 7, the wear powder discharge performance is also high, and the forced discharge path KR2 (discharge path KR) and its surroundings The remaining wear powder is reliably discharged to the outside of the clutch chamber 60c.
As described above, in the wear powder discharging apparatus of the first embodiment, the wear powder that cannot be discharged only by the rotation of the multi-plate clutch device 7 is also forced by sending compressed air from the external air introduction path 100 to the discharge path KR. Can be discharged.

(Effect of Embodiment 1)
In the wear powder discharging apparatus of the first embodiment, the effects listed below can be obtained.
1) The wear powder discharging apparatus of Embodiment 1 is
A housing 600 for housing the multi-plate clutch device 7;
From the outside air intake port 60d as the first opening opened in the front cover 60 of the housing 600, passes through the multi-plate clutch device 7 and the clutch drum 6 as a support portion thereof to the front cover 60 of the housing 600. Abrasion powder discharge path KR of the multi-plate clutch device 7 leading to the open air outlet 60e as the opened second opening,
An external air introduction path 100 as an external fluid introduction path provided in the discharge path KR so as to be able to introduce air as a fluid for forcibly discharging wear powder from the outside of the housing 600;
It is characterized by having.
Therefore, by supplying high-pressure air as a fluid for forcibly discharging wear powder from the outside of the housing 600 to the external air introduction path 100, the wear powder passes through the discharge path KR from the outside air discharge port 60e. It can be discharged to the outside.
Therefore, it is possible to reliably discharge the wear powder that is not discharged only by the centrifugal force when the multi-plate clutch device 7 is rotated to the outside of the housing 600.
In addition, in the first embodiment, the position of the opening of the external air introduction path 100 to the clutch chamber 60c is arranged at the same circumferential position as the outside air inlet 60d. For this reason, when high-pressure air is supplied from the outside, high-pressure air is supplied over the entire length of the discharge path KR, and compared with the case where air is supplied in the middle of the discharge path KR, the performance of discharging accumulated wear powder is higher. high.

2) The wear powder discharging apparatus of the first embodiment is
An extension pipe 102 as an extension path extending from the housing 600 is connected to the external air introduction path 100 as an external fluid introduction path, and the tip of the extension pipe 102 is connected to an air hose 110 as an external fluid supply source. A connection jack 103 is provided as a connection tool.
Therefore, in the engine room ER, the connection jack 103 connected to the air hose 110 as an external fluid supply source can be arranged at an arbitrary position, and the connection work becomes easy and the workability is excellent. Further, the provision of the connection jack 103 also facilitates connection with the air hose 110 as an external fluid supply source, and is excellent in workability.
In addition, in the first embodiment, the connection jack 103 is prevented from air leakage between the connection jack 111 and the connection jack 111 at the tip of the air hose 110, and efficient air supply without air leakage is possible. is there.

3) The wear powder discharging apparatus of Embodiment 1 is
The external air introduction path 100 as the external fluid introduction path is provided in the front cover 60 constituting the housing 600.
Therefore, by performing the assembly work of the front cover 60, the routing work of the external air introduction path 100 can also be performed. Therefore, as compared with the case where the external fluid introduction path is provided separately from the housing 600 such as the front cover 60, the wiring work can be simplified and a workability factory can be achieved.

(Other embodiments)
Next, a wear powder discharging apparatus according to another embodiment will be described.
Since the other embodiment is a modification of the first embodiment, the same reference numerals as those in the first embodiment are assigned to the same components as those in the first embodiment, and the description thereof is omitted. Only the differences will be described.

(Embodiment 2)
In the second embodiment, the connection position and the wiring direction of the extension pipe 202 as an extension path are different from those in the first embodiment, the amount of wear powder remaining in the housing 600 is detected, and the wear powder is forcibly discharged. This is an example of displaying the necessity to do.

  That is, as shown in FIG. 5, in the second embodiment, the extension pipe 202 is connected to the lower portion of the front cover 60 and is routed toward the lower end portion of the engine room ER. Note that a connection jack 103 and a cap 104 are provided at the distal end of the extension pipe 202 as in the first embodiment.

  Further, the clutch chamber 60c is provided with a weight sensor 200 that receives the wear powder and detects its weight as an amount of wear powder at the lower portion of the clutch chamber 60c, which is a position where the wear powder can be received. The weight sensor 200 is located near the outer periphery of the clutch drum 6 in the front cover 60, in the vicinity of the outside air outlet 60e, and wear powder that falls into the clutch chamber 60c without being discharged from the outside air outlet 60e. It is installed in a position where it can be received.

Further, the detection signal of the weight sensor 200 is input to the control unit 210 that controls the vehicle mounted on the vehicle, and the detected weight is stored as the latest value at any time. The control unit 210 includes a connection port 211 that is connected to a diagnostic device 220 as an external diagnostic device when a vehicle is maintained in a service factory or the like. The control unit 210 is connected to the sensor group 230 in order to input information necessary for executing various vehicle controls. This sensor group 230 includes a wheel speed sensor that detects the rotational speed of a wheel (not shown), and also includes an ignition switch or an engine speed sensor as means for determining whether or not the engine Eng is being driven. It is.
Furthermore, the diagnostic device 220 includes a display device 221, and executes message display processing based on the latest detected value (wear powder weight) of the stored weight sensor 200 when connected to the control unit 210.

FIG. 6 shows the flow of message display processing in the diagnostic device 220.
The message display process is started when a process start operation such as turning on a switch instructing the wear powder accumulation determination process is performed after the diagnostic apparatus 220 is connected to the control unit 210.

In the first step S201, it is determined whether or not the operation for deleting the display of the wear powder accumulation message has been performed by the diagnostic device 220. If the operation has been performed, the process proceeds to step S208. If the operation has not been performed, step S202 is performed. Proceed to
In step S202, it is determined whether or not the wear powder accumulation message has already been displayed in the diagnostic device 220. If the message has been displayed, the process proceeds to step S207, and if not yet displayed, the process proceeds to step S203.

In steps S203 to S205 that proceed when the wear powder accumulation message is not displayed, display determination processing based on the detected amount of wear powder is executed.
In this display determination process, first, in step S203, it is determined whether or not the engine Eng is stopped based on the input from the sensor group 230. If the engine Eng is stopped, the process proceeds to step S204 and stopped. If not, the process proceeds to step S207.

In step S204, which proceeds when the engine is stopped, the vehicle is determined to be stopped. If the vehicle is in a stopped state, the process proceeds to step S205, and if not, the process proceeds to step S207. That is, the forcible discharge work of wear powder (the same work as described in the first embodiment) and the display determination process are performed in the engine stopped state and the vehicle stopped state, and the engine is being driven and the vehicle is not stopped. Does not perform display determination processing. In addition, during the engine driving and when the vehicle is not stopped, the forced dust discharge operation is not performed.
In step S205 that proceeds when the vehicle is in a stopped state, is the detection value of the weight sensor 200 equal to or greater than a predetermined determination value α for determining whether or not the forced discharge work of wear powder is necessary? Determine whether or not. If the detected value exceeds the determination value α, the process proceeds to step S206. If the detected value is less than the determination value α, the process proceeds to step S207.

In step S <b> 206, which proceeds when the detected value is equal to or larger than the determination value α, the display device 221 displays that the amount of wear powder that requires a forced discharge operation has accumulated. That is, the diagnostic device 220 is connected to the control unit 210, and when the wear powder accumulation determination process is started and the engine is stopped and the vehicle is stopped, the abrasion powder accumulation determination process is performed. When the detection value of the weight sensor 200 exceeds the determination value α, a wear powder accumulation message indicating that the wear powder is accumulated is displayed on the display device 221.
On the other hand, when the detection value of the weight sensor 200 is less than the determination value α, the process proceeds to step S207 and the display on the display device 221 is maintained. That is, when the wear powder accumulation message is not displayed or when a message indicating that the forced discharge work of wear powder is not displayed, the display state is maintained.

In step S201, the process proceeds to step S208 when the process for deleting the display of the wear powder accumulation message is performed, and the wear powder accumulation message is deleted. It should be noted that the operation for deleting the display of the wear powder accumulation message is performed by an operator or the like after forcibly discharging the wear powder.
The forced discharge operation is the same as that in the first embodiment, but the operation is slightly different due to the different arrangement of the connection jack 103 of the extension pipe 102. In other words, since the connection jack 103 is arranged at the lower part of the engine room ER, when the forced discharge work is performed in a service factory or the like, the vehicle is lifted up or the operator enters under the engine room ER. Thus, the connection work of the air hose 110 is executed.

(Operation of Embodiment 2)
Next, the operation of the second embodiment will be described.
In the second embodiment, a vehicle equipped with the wear powder discharging device of the second embodiment is brought into a facility having a diagnostic device 220 such as a service factory, and the presence or absence of accumulation of wear powder in the multi-plate clutch device 7 is diagnosed. .

  At the time of this diagnosis, the diagnosis device 220 is connected to the vehicle control unit 210, and a switch-on operation (not shown) for instructing the execution of diagnosis is performed. In this case, the work start condition is that the engine Eng is stopped and the vehicle travel is also stopped.

  By this instruction operation, the wear powder accumulation determination process is executed, and when the detection value of the weight sensor 200 exceeds the predetermined determination value α, the wear powder accumulation message is displayed on the display device 221 of the diagnostic device 220. Is displayed.

Therefore, when this wear powder accumulation message is displayed, the forced discharge operation of connecting the air hose 110 to the extension pipe 202 and supplying the high-pressure air to the discharge path KR is executed as in the first embodiment. To do.
As a result, the wear powder accumulated in the clutch chamber 60c is discharged to the outside of the clutch chamber 60c through the forced discharge path KR2.
In addition, after implementation of this forced discharge operation, the operator performs an operation of deleting the display of the wear powder accumulation message on the display device 221.

(Effect of Embodiment 2)
Below, the effect of the abrasion powder discharge | emission apparatus of Embodiment 2 is enumerated.
2-1) The wear powder discharging apparatus of Embodiment 2 is
Inside the housing 600, a weight sensor 200 is provided as a wear powder sensor for detecting the amount of wear powder.
When the diagnostic device 220 is connected, the diagnostic device 220 displays a wear powder accumulation message as a display process corresponding to the wear powder amount detected by the weight sensor 200 when the wear powder amount exceeds the determination value α. It is characterized by that.
In this way, the accumulated amount of wear powder is detected by the weight sensor 200, and further, based on the detected value, the diagnosis device 220 determines whether or not forced discharge of the wear powder is necessary, and the determination result Was displayed.
Thereby, a forced discharge operation can be performed accurately according to the actual amount of accumulated wear powder.
Furthermore, since the weight sensor 200 is installed and detected at a position where the wear powder is likely to be deposited as a detection of the wear powder accumulation amount, the wear powder can be detected by an inexpensive means.

(Embodiment 3)
Next, the abrasion powder discharging apparatus of Embodiment 3 will be described.
The third embodiment is an example in which wear powder is forcibly discharged by the host vehicle without using a high-pressure air source such as a service factory.

In the wear powder discharging apparatus according to the third embodiment shown in FIG. 7, as in the second embodiment, an extension pipe 302 is provided extending below the engine room ER.
In the third embodiment, a drive part 310 having an enlarged diameter is provided at the tip of the extension pipe 302. The driving unit 310 is provided with a mesh-shaped cover 311 for dust prevention at the opening at the tip, and a fan 320 for blowing air from the opening at the tip of the extension pipe 302 to the external air introduction path 100 side. It has been. The fan 320 is a so-called waterproof type that prevents water from entering the external air introduction path 100 that is the air blowing side, and that the fan 320 itself is waterproof.

The drive of the fan 320 is controlled by the control unit 330, and the forced discharge process shown in the flowchart of FIG. 8 is executed.
The forced discharge process will be described below based on the flowchart of FIG. In the initial state of the forced discharge process, the fan 320 is stopped.
This forced discharge process is executed when the vehicle is stopped with the engine Eng stopped. That is, in the first step S301, it is determined whether or not the engine is stopped. If it is stopped, the process proceeds to step S302. If not stopped, the process proceeds to step S307, and the fan 320 is maintained in the stopped state.

  In step S302 that proceeds when the engine is stopped, it is determined whether or not the vehicle is in a stopped state based on a signal from a wheel speed sensor (not shown) included in the sensor group 230, and is in a stopped state. Then, it progresses to step S307.

  In step S303 that proceeds when the engine is stopped and the vehicle is stopped, the detection value of the weight sensor 200 is equal to or greater than a determination value α that is set in advance to determine whether or not forced discharge of wear powder is necessary. It is determined whether or not. If the detected value exceeds the determination value α, the process proceeds to step S304. If the detected value is less than the determination value α, the process proceeds to step S307.

  In step S304 that proceeds when the detection value of the weight sensor 200 exceeds the determination value α, the operation time of the fan 320 is set to a preset time t (s) that is set in advance at a minimum time required for forced discharge of wear powder. ) Is determined whether or not. If the operation time of the fan 320 is less than the set time t (s), the process proceeds to step S305. If the operation time exceeds the set time t (s), the process proceeds to step S307, and the fan 320 and the engine Eng are stopped. Let Note that, as described above, the fan 320 is stopped in the initial state, and the operation time of the fan 320 is less than the set time t (s) during the first processing of step S304.

In step S305 which proceeds when the operation time of the fan 320 is less than the set time t (s) in step S304, the multi-plate clutch device 7 is engaged in the forced HEV mode and the engine Eng is driven. In the next step S306, the fan 320 is operated. Note that in the forced HEV mode in step S305, in order to prevent the vehicle from running, unlike the normal HEV mode, the transmission unit T / M functions as a second clutch that connects and disconnects the motor and drive wheels (not shown). The clutch to be released is in a released state.
Therefore, while the fan 320 is in operation, the engine Eng is driven at the same time, and the multi-plate clutch device 7 is also engaged, but no power is transmitted to the driving wheels (not shown).
In step S307, which is determined as NO in any of steps S301 to S304 and proceeds, the operation of the fan 320 is stopped, the drive of the engine Eng is stopped, and the multi-plate clutch device 7 is released.
Thus, the forced discharge process ends.

(Operation of Embodiment 3)
Next, the operation of the third embodiment will be described.
In the third embodiment, when the engine is stopped and the vehicle is stopped, a process for determining whether or not to forcibly discharge the wear powder is performed. In this case, based on the detection of the weight sensor 200, when the accumulated weight of the wear powder at the installation site of the weight sensor 200 exceeds a preset determination value α, the process for forcibly discharging the wear powder is executed.

In this forced discharge processing of wear powder, in the forced HEV mode, the engine Eng is driven, the multi-plate clutch device 7 is fastened, and the fan 320 is further operated.
Therefore, due to the driving of the engine Eng and the engagement of the multi-plate clutch device 7, the multi-plate clutch device 7 blows air along the discharge path KR indicated by the arrow due to the negative pressure generated as the plates 71 and 72 rotate. It is formed. Further, the operation of the fan 320 adds air to the forced discharge path KR2 including the extension pipe 302 and the external air introduction path 100, and the wear powder accumulated in the clutch chamber 60c is discharged to the outside of the clutch chamber 60c. .

  Further, the forced discharge processing of the wear powder is performed only for a preset time t (s), and after the set time t (s), the fan 320 and the engine Eng are stopped to remove the wear powder. The forced discharge process is terminated.

In addition, since the opening part of the front-end | tip of the drive part 310 of the extension pipe 302 is covered with the cover 311, the penetration | invasion to the clutch chamber 60c, such as dust and dust, is prevented.
Further, since the fan 320 itself has a waterproof function and also has a water intrusion preventing function, water intrusion into the clutch chamber 60c is also prevented.

(Effect of Embodiment 3)
Next, effects of the third embodiment are listed.
3-1) The wear powder discharging apparatus of Embodiment 3 is
The external air introduction path 100 as an external fluid introduction path is provided with a fan 320 that forms air flow from the outside toward the inside of the housing.
Therefore, the wear powder can be automatically discharged without bringing the vehicle into a maintenance shop or the like.

3-2) The wear powder discharging apparatus of Embodiment 3 is
A weight sensor 200 as a wear powder sensor for detecting the amount of wear powder is provided in the clutch chamber 60c inside the housing 600, and
When the amount of wear powder detected by the weight sensor 200 exceeds a predetermined determination value α, a control unit 330 is provided as a control unit that executes a forced discharge process of wear powder that blows the fan 320. It is characterized by.
Therefore, when the amount of wear powder in the clutch chamber 60c exceeds the determination value α, the fan 320 can be automatically blown to discharge the wear powder.

3-3) The wear powder discharging apparatus of Embodiment 3 is
When the control unit 330 executes the abrasion powder discharging process, the engine Eng is forcibly driven in the HEV mode and the multi-plate clutch device 7 is fastened.
Therefore, in addition to the air blowing operation by the fan 320, air blowing by a negative pressure generated by the rotation of the multi-plate clutch device 7 is also added, and the wear powder discharging performance is improved as compared with the forced discharging by only the fan 320 air blowing operation.
In addition, the forced discharge processing of the wear powder is performed when the vehicle is stopped, but after the set time t (s) at which the wear powder can be sufficiently discharged, it is automatically stopped. Even when the vehicle is stopped, it can be executed without any problem.

As mentioned above, although this invention has been demonstrated based on embodiment, it is not restricted to these embodiment about specific structure, It does not deviate from the summary of the invention which concerns on each claim of a claim As long as the design is changed or added, it is acceptable.
In the embodiment, an example using a dry multi-plate clutch as a dry clutch is shown, but an example using a single-plate dry clutch or the like may be used.
In the embodiment, an example of a dry clutch by normal opening has been shown. However, it may be an example of a dry clutch that is normally closed using a diaphragm spring or the like.
In the embodiment, an example in which the drive plate has friction facing has been described. However, the driven plate may have a friction facing.
In the embodiment, an example in which a vent hole, a facing groove, and the like are set in order to secure an air flow path in the dry multi-plate clutch has been shown. However, even if there is no vent hole or fading groove, the communication path of the spline coupling portion becomes an axial airflow passage, and the gap between the plates becomes a radial airflow passage. For this reason, it is not always necessary to set a vent hole or a facing groove.
In the embodiment, an example of application to a hybrid driving force transmission device in which an engine and a motor / generator are mounted and a dry multi-plate clutch is used as a travel mode transition clutch has been described. However, the present invention can also be applied to an engine driving force transmission device in which only an engine is mounted as a driving source and a dry clutch is used as a starting clutch, such as an engine vehicle. Further, the present invention can be applied to a motor driving force transmission device in which only a motor / generator is mounted as a driving source and a dry clutch is a starting clutch, such as an electric vehicle or a fuel cell vehicle.

In the first embodiment, air is exemplified as the fluid supplied to the external fluid introduction path in order to forcibly discharge the wear powder. However, the present invention is not limited to this, and gas other than air, such as nitrogen gas, It is also possible to use a liquid having properties.
In the first embodiment, the example in which the external fluid introduction path is provided along the front cover is shown. However, the present invention is not limited to this, and the hose or the pipe is connected to the position of the outside air inlet outside the front cover. May be formed independently of the front cover (housing).
In the second embodiment, an example is shown in which the display process is performed when the detection value of the weight sensor as the wear powder sensor exceeds the determination value. However, a plurality of determination values are set and displayed step by step. The contents may be switched. For example, when the detected value exceeds the first determination value, it is displayed that it is preferable to perform the forced discharge work soon, and when the detected value exceeds the second determination value, it is necessary to execute forced discharge. It may be a step-by-step display such as displaying a message.
In the embodiment, an extension pipe separate from the housing is shown as the extension path. However, the extension path may also be formed using a housing or other structures.
In the embodiment, the diagnosis device as the external diagnostic device is an example in which the signal from the weight sensor as the wear powder sensor is input from the control unit. However, the external diagnosis device is from the wear powder sensor. It may be configured to directly input a signal.

7 Multi-plate clutch device (clutch)
60 Front cover 60c Clutch chamber 60d Outside air inlet (first opening)
60e Outside air outlet (second opening)
100 External air introduction path (external fluid introduction path)
102 Extension pipe (extension path)
103 Connection jack (connector)
110 Air hose (external fluid supply source)
200 Weight sensor (Abrasion powder sensor)
202 Extension pipe (extension path)
210 Control unit (control means)
220 Diagnostic equipment (external diagnostic equipment)
221 Display device 302 Extension pipe (extension path)
320 Fan (Blower)
330 Control unit (control means)
600 Housing KR Discharge path KR2 Forced discharge path

Claims (5)

A housing that houses the clutch;
A drainage path for the abrasion powder of the clutch from the first opening opened in the housing to the second opening opened in the housing through at least one of the clutch and its support portion;
An external fluid introduction path provided so that a fluid for forcibly discharging the wear powder from the outside of the housing can be introduced into the discharge path;
A wear powder discharging device comprising: In the wear powder discharging apparatus according to claim 1,
The external fluid introduction path is provided with an extension path extending from the housing, and a connecting tool for connection with an external fluid supply source is provided at the distal end of the extension path. apparatus. In the abrasion powder discharging apparatus according to claim 1 or 2,
The external fluid introduction path is provided with a blower for forming air blowing from the outside of the housing toward the inside of the housing. In the abrasion powder discharging apparatus according to claim 3,
A wear powder sensor for detecting the amount of wear powder is provided inside the housing,
When the amount of wear powder detected by the wear powder sensor exceeds a preset amount, there is provided control means for executing a wear powder forced discharge process for forcibly discharging the wear powder by operating the air blower. A wear powder discharging apparatus characterized by that. In the abrasion powder discharging apparatus according to claim 1 or 2,
A wear powder sensor for detecting the amount of wear powder is provided inside the housing,
A wear powder discharging apparatus characterized in that, when an external diagnostic device is connected, the external diagnostic device executes display processing corresponding to the amount of wear powder detected by the wear powder sensor.