JP4474224B2 - Driving force transmission control device for vehicle - Google Patents

Description

  The present invention relates to a vehicle driving force transmission control device that is arranged in series with a driving force transmission shaft of a vehicle and controls driving force transmitted by the driving force transmission shaft.

  An electromagnetic type arranged in series with the propeller shaft in order to select a four-wheel drive state or a two-wheel drive state or to control the power distribution ratio between the front wheels and the rear wheels in the four-wheel drive state There has been proposed a vehicle driving force transmission control device that is arranged in series with a driving force transmission shaft of a vehicle and controls the driving force transmitted by the driving force transmission shaft, like a clutch device. For example, the driving force transmission device described in Patent Document 1 is the same.

JP-A-10-213164

  In the vehicle driving force transmission control device as described above, the bottomed cylindrical first rotating member that rotates together with one driving force transmission shaft and the other driving force transmission in a state of being inserted into the first rotating member. A second rotating member that rotates together with the shaft is coupled so as to be relatively rotatable about a common axis, and friction between the first rotating member and the second rotating member is transmitted from one of them to the other. An engagement device is provided, and an electromagnet for controlling the transmission torque of the friction engagement device is provided to be rotatable relative to the first rotation member and the second rotation member. Thereby, when an exciting current is supplied to the electromagnet via the lead wire, a torque having a magnitude corresponding to the exciting current is transmitted from one of the first rotating member and the second rotating member to the other.

  By the way, in the conventional vehicle driving force transmission control device as described above, there is a possibility that sufficient durability is not necessarily obtained. For example, since gaps are formed on the outer peripheral side and the inner peripheral side of the cylindrical electromagnet at the opening of the bottomed cylindrical first rotating member, it is conceivable to fix the shielding member covering the gap to the electromagnet. The intrusion of foreign matter such as dust during traveling of the vehicle cannot always be sufficiently prevented by the shielding member, and the durability may be impaired by the foreign matter. Also, a ring-shaped seal member that performs sealing while allowing relative rotation is provided in a gap formed on the outer peripheral side and inner peripheral side of the cylindrical electromagnet at the opening of the bottomed cylindrical first rotating member. However, especially in the gap formed on the outer peripheral side of the electromagnet, the peripheral speed due to the relative rotation is large and the ring-shaped seal member has a large diameter, so that sufficient durability is not always obtained and expensive. There was an inconvenience.

  The present invention has been made against the background of the above circumstances, and an object of the present invention is to provide a vehicle driving force transmission control device capable of obtaining sufficient durability against foreign matter.

The gist of the invention according to claim 1 for achieving the above object is to provide a vehicle drive that is arranged in series with a driving force transmission shaft of a vehicle and controls the driving force transmitted by the driving force transmission shaft. A force transmission control device comprising: (a) a bottomed cylindrical first rotating member, and a relative rotation about a common axis with respect to the first rotating member in a state of being inserted into the first rotating member; A second rotating member rotatably connected; and (b) friction that is provided between the inner peripheral surface of the first rotating member and the outer peripheral surface of the second rotating member and transmits torque from one of them to the other. An engaging device; and (c) a first rotating member that is relatively rotatable about a common axis with respect to the first rotating member and the second rotating member in order to control the transmission torque of the friction engaging device. The rotation is prevented by being provided in the rotating member and connected to the non-rotating member. A cylindrical electromagnet; (d) a cover member fitted to the opening of the bottomed cylindrical first rotating member on the outer peripheral side of the electromagnet; and (e) the bottomed cylindrical first rotating member. An opening or an inner peripheral surface facing the outer peripheral surface of the cover member exposed from the opening with a slight gap therebetween, so as to cover the gap between the cover member and the electromagnet. A shielding member fixed on the opposite side of the electromagnet from the first rotating member in the direction of the axis; and (f) the opening of the bottomed cylindrical first rotating member or the opening exposed from the opening. On the outer peripheral surface of the cover member and facing at least the inner peripheral surface of the shielding member, the first rotating member or the cover member is directed toward the shielding member side in the direction of rotation of the vehicle when traveling forward. Including a thread formed on is there.

According to the first aspect of the present invention, the outer peripheral surface of the cover member that is fitted into the opening of the bottomed cylindrical first rotating member or the opening of the bottomed cylindrical first rotating member and is exposed from the opening. And the first rotating member side of the electromagnet in the direction of the axis so that the shielding member having an inner peripheral surface facing the gap with a slight gap covers the gap between the cover member and the electromagnet. Is fixed to the opposite side, the opening of the bottomed cylindrical first rotating member or the outer peripheral surface of the cover member exposed from the opening, and at least the surface facing the inner peripheral surface of the shielding member, As the first rotating member or the cover member is formed with a screw thread toward the shielding member side in the rotational direction when the vehicle moves forward, the first rotating member or the cover member With the outer surface Since the foreign matter that tries to enter the gap between the inner peripheral surface of the shielding member is discharged to the first rotating member side that is behind by the screwing action of the screw thread, Intrusion of foreign matter into the vehicle can be suitably prevented, and the durability of the vehicle driving force transmission control device can be sufficiently obtained.

The gist of the invention according to claim 2 is that: (a) The electromagnet is disposed between an inner peripheral surface of the cover member and an outer peripheral surface of the electromagnet in order to support the electromagnet so as to be relatively rotatable. And (b) a seal device disposed between the inner peripheral surface of the electromagnet and the outer peripheral surface of the second rotating member. In this case, the cover member is fitted into the opening of the bottomed cylindrical first rotating member on the outer peripheral side of the electromagnet, and the inner peripheral surface of the cover member is supported so as to be relatively rotatable. Since a shield bearing is disposed between the outer peripheral surface of the electromagnet and a seal device is disposed between the inner peripheral surface of the electromagnet and the outer peripheral surface of the second rotating member, the non-rotating electromagnet Among the gaps formed on the outer peripheral side and the inner peripheral side, the gap on the outer peripheral side of the electromagnet, which is the side with the higher relative rotational speed, is sealed by the shield bearing, so that the clearance seal is allowed while allowing relative rotation. Compared to the case where the ring-shaped sealing device for performing the above operation is provided in the gap formed on the outer peripheral side of the electromagnet, sufficient durability can be obtained, and the space for providing the ring-shaped sealing device is not required, and the vehicle drive The axial dimension of the transmission control device becomes small, yet less expensive and the number of parts is reduced.

  Here, preferably, the cylindrical electromagnet includes a cylindrical yoke member and an annular coil fixed to the first rotating member side of the yoke member. The member is engaged with a side surface of a pin erected in parallel with the axial direction on the end surface of the yoke member exposed to the opening side of the first rotating member. If it does in this way, there exists an advantage by which the relative movement of the axial direction with respect to the pin of the engaging member supported by the said buffer member is accept | permitted.

  Preferably, the yoke member is provided with a through hole penetrating in the axial direction, and an annular coil fixed to the first rotating member side of the yoke member through a lead wire guided through the through hole. An exciting current is supplied. In this way, as compared with the case where the lead wire is passed through the groove formed on the outer peripheral surface or the inner peripheral surface of the yoke member, the unevenness of the outer peripheral surface or the inner peripheral surface of the yoke member is eliminated, so that foreign matter can be prevented from entering. There is an advantage that a seal for prevention is easy.

  Preferably, the lead wire passed through the through hole is connected to a connector fixed to an end surface of the yoke member exposed to the opening side of the first rotating member. In this way, the connector is positioned closer to the yoke member than the case where the connector is fixed to another non-rotating member, so that the reliability with respect to disconnection is increased and the configuration is simplified. There is.

  Preferably, the cover member includes a male screw formed on an outer peripheral surface thereof, and is screwed onto an inner peripheral side of the bottomed cylindrical first rotating member. A bottom wall and a cylindrical outer peripheral wall formed in an axial direction from an outer peripheral edge of the bottom wall, and the bottom wall is fixed to an end surface of the yoke member exposed to the opening side of the first rotating member. In addition, a thread that is an extension of the male screw is formed on a portion of the outer peripheral surface of the cover member that faces the outer peripheral wall. According to this configuration, the extension of the thread of the male screw for screwing the cover member to the inner peripheral surface of the first rotating member is located at a portion facing the outer peripheral wall of the shielding member, and foreign matter enters. Therefore, there is an advantage that it is not necessary to machine the thread independently.

  Preferably, the outer peripheral surface of the second rotating member is a needle for supporting the cover member between the inner peripheral surface of the electromagnet on which the sealing device is disposed and the outer peripheral surface of the second rotating member. The surface on which the bearing is supported. In this aspect, since the polishing finish and the heat treatment are inherently performed so that the needle bearing is rolled, there is an advantage that the finish processing and heat treatment for the sealing device are not required.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing an attachment state of a vehicle driving force transmission control device (hereinafter abbreviated as a clutch device) 10 according to an embodiment of the present invention. FIG. 1 is a front and rear wheel drive vehicle based on front engine front wheel drive (FF), and a clutch device 10 of this embodiment is a driving force between a rear wheel and a transmission to drive a rear wheel. Is inserted in series between the first propeller shaft 12 and the second propeller shaft 14 which are arranged to transmit the power and constitute one driving force transmission shaft.

  The clutch device 10 includes a first rotating member 18 having a bottomed cylindrical shape connected to a shaft end portion of a first propeller shaft 12 by a bolt nut 16 and rotated therewith, and a shaft end portion of a second propeller shaft 14. It is provided with a cylindrical second rotating member 20 that is spline-fitted with the fitting and is rotated together therewith. The second rotating member 20 is sufficiently smaller in diameter than the first rotating member 18 and is inserted into the first rotating member 18, and the outer peripheral surface of the distal end portion of the second rotating member 20 and the proximal end portion of the first rotating member 18. A ball bearing 22 is fitted between the peripheral surface and the first rotating member 18 and the second rotating member 20 are coupled to be rotatable about a common axis. In addition, the said 1st rotation member 18 is comprised from nonmagnetic materials, such as a light alloy, in order to form a magnetic circuit suitably with the electromagnet 60 mentioned later.

  As shown in detail in FIG. 2, the space between the outer peripheral surface of the second rotating member 20 and the inner peripheral surface of the first rotating member 18 is not relatively rotatable on the outer peripheral surface of the second rotating member 20 and has a shaft. A plurality of annular inner peripheral friction plates 24 engaged with each other so as to be movable in the direction and a plurality of sheets engaged with each other so as not to rotate relative to each other on the inner peripheral surface of the first rotating member 18. And the outer peripheral friction plate 26 are slidably stacked in the axial direction, and the inner peripheral friction plate 24 is moved from the main pressing member 28 provided to be movable in the axial direction. And a main friction engagement device 30 that transmits a torque having a magnitude proportional to the axial force applied to the outer friction plate 26 from one of the second rotating member 20 and the first rotating member 18 to the other. It is arranged.

  A female screw 32 is formed on the inner peripheral surface of the opening of the bottomed cylindrical first rotating member 18, and a male screw 36 is formed on the outer peripheral surface of the cover member 34. Is screwed into the female screw 32 of the first rotating member 18, so that the cover member 34 is screwed into the opening of the first rotating member 18. The male screw 36 is constituted by a left screw so that the first propeller shaft 12 transmits a driving force counterclockwise when the vehicle is traveling forward. The male screw 36 is further screwed with a lock nut 38 for locking the screwed state of the first rotating member 18 and the cover member 34. The cover member 34 is supported by the second rotating member 20 so as to be relatively rotatable via a needle bearing 40 rotated between the inner peripheral surface of the cover member 34 and the outer peripheral surface of the second rotating member 20. .

  The cover member 34 includes an inner peripheral side cover member 42 made of a magnetic metal such as silicon steel, an outer peripheral side cover member 44 made of a magnetic metal such as silicon steel, and nonmagnetic stainless steel press-fitted therebetween. The annular groove 48 is formed on the exposed side end surface by being integrally formed of three members including the press-fitting member 46 made of the product. The nonmagnetic stainless steel press-fitting member 46 suitably forms a magnetic circuit shown by a one-dot chain line in FIG. The cover member 34 is fitted between the outer peripheral surface of the second rotating member 20 and the inner peripheral surface of the first rotating member 18, so that the opening of the bottomed cylindrical first rotating member 18 is covered with the cover member. An oil-tight space for accommodating the main friction engagement device 30 and the like is formed between the first rotating member 18 and the second rotating member 20. The main friction engagement device 30 and the like are wetted by filling the space with lubricating oil. The seal ring 50 is made of synthetic rubber and seals between the outer peripheral surface of the second rotating member 20 and the inner peripheral surface of the first rotating member 18, and the seal single 52 is made of synthetic rubber. And sealing between the outer peripheral surface of the second rotating member 20 and the inner peripheral surface of the inner peripheral side cover member 42, and the sealing ring 54 is made of synthetic rubber and is formed of the first rotating member 18. The gap between the inner peripheral surface and the outer peripheral surface of the outer peripheral side cover member 44 is sealed.

  The electromagnet 60 includes a cylindrical yoke member 62 made of a magnetic metal such as silicon steel, and an annular coil 64 fixed to the first rotating member 18 side of the yoke member 62, that is, the first propeller shaft 12 side. The whole is configured in a cylindrical shape, and is accommodated in an annular groove 48 formed on the end surface of the cover member 34 on the second propeller shaft 14 side, and is disposed on the outer peripheral side via a shield ball bearing 66. The cover member 44 is supported so as to be relatively rotatable. As a result, the electromagnet 60 is relative to the first rotating member 18 and the second rotating member 20 in a state where the outer peripheral surface and the inner peripheral surface are separated from the side wall surface of the annular groove 48 by a very small gap. It can be rotated. Further, the gap between the outer peripheral surface of the yoke member 62 and the side wall surface of the annular groove 48 is sealed from the outside by the shield ball bearing 66 to prevent the entry of foreign matter.

  Further, in the electromagnet 60, a through hole 68 penetrating the yoke member 62 in a direction parallel to the axis is formed, and the lead wire 70 connected to the coil 64 is taken out to the outside through the through hole 68. It has become. As shown in FIGS. 3 and 4, a bracket 76 protruding from the connector 74 is fixed to the exposed end surface 72 of the yoke member 62 on the second propeller shaft 14 side, that is, the exposed end surface 72 of the electromagnet 60 by a bolt 78. The lead wire 70 is connected to the connector 74. Further, on the exposed end surface 72 of the yoke member 62 on the second propeller shaft 14 side, that is, the exposed end surface 72 of the electromagnet 60, an engagement pin 80 fixed by press-fitting or the like is erected in a direction parallel to the axis. .

  On the other hand, as shown in FIG. 1, the second propeller shaft 14 is rotatably supported via a support bearing 82 fixed to a body of an automobile (not shown) that is a non-rotating member, that is, the under floor of the vehicle body. The body of the automobile is supported by the shock absorbing member 84 by adhering to an inner peripheral portion of the shock absorbing member 84 and an elastically deformable annular shock absorbing member 84 made of, for example, synthetic rubber for absorbing vibration. Further, a metal bearing holding member 86 to which the support bearing 82 is fitted and held, and an outer peripheral portion of the buffer member 84 are fixed, so that the support bearing 82 is elastically supported. A bearing holding device 90 including a housing 88 is fixed. The bearing holding member 86 is provided with an engaging protrusion 92 that protrudes in a direction parallel to the axis. For example, as shown in the enlarged view of the main part viewed from the outer peripheral side of FIG. 5, the engaging protrusions 92 are a pair of engaging pins 80 that engage the side surfaces of the engaging pins 80 so as to sandwich the engaging pins 80 in the circumferential direction. An engagement surface 94 is provided so that a certain amount of relative movement between the engagement protrusion 92 and the engagement pin 80 is allowed, and the rotation of the electromagnet 60 is prevented.

  In the space between the first rotating member 18 and the second rotating member 20 that are oil-tightly closed by the cover member 34, the auxiliary friction engagement device 96 adjacent to the cover member 34 and the auxiliary friction are provided. Via a magnetic metal sub-pressing member 98 attracted to the electromagnet 60 side by electromagnetic force in order to generate a relatively small pilot torque in the engagement device 96, a thrust bearing 100 and a plurality of spherical rolling elements 102. In a state of being sandwiched between the cover member 34 and the main pressing member 28, it is provided so as to be relatively rotatable with respect to the other members, and is rotated by a relatively small predetermined angle in accordance with the pilot torque and is axially An annular rotating member 104 for generating a pressing force is provided.

  The auxiliary friction engagement device 96 includes a plurality of annular outer peripheral friction plates 106 engaged with the inner peripheral surface of the first rotating member 18 so as not to be relatively rotatable and movable in the axial direction, and the rotating member. A plurality of annular inner peripheral friction plates 108 which are engaged with each other on the outer peripheral surface 104 so as to be relatively unrotatable and movable in the axial direction are slidably stacked in the axial direction. In addition, a pilot torque having a magnitude corresponding to the pressing force generated by the magnetic attraction action on the sub-pressing member 98 is transmitted to the rotating member 104. In order to accommodate and guide a part of the plurality of spherical rolling elements 102 sandwiched between the rotating member 104 and the main pressing member 28 at equal intervals in the circumferential direction, the rotating member 104 and the main pressing A circumferential groove 110 and a groove 112 are formed on the annular facing surface of the member 28, and the groove 110 and the groove 112 are formed on the spherical rolling element 102 as the rotating member 104 rotates. Each is formed so as to become shallower in the rolling direction, and the pressing force from the main pressing member 28 to the main friction engagement device 30 is increased according to the rotation amount of the rotating member 104. Thereby, torque according to the excitation current of the electromagnet 60 is transmitted from one of the first rotating member 18 and the second rotating member 20 to the other.

  In the present embodiment, when the first propeller shaft 12 is rotated counterclockwise, the driving force output from the engine and the transmission is transmitted to the second propeller shaft 14, and the first rotating member 18 is the second rotating member. Since the rotating member 104 is rotated counterclockwise with respect to the second rotating member 20 by the generation or increase of the pilot torque, the spherical rolling element 102 is simultaneously rotated. In the case of the concave groove 110, the first propeller shaft 12, that is, the first rotating member 18 is rotated in a direction opposite to the rotation direction. In the case of the concave groove 112, the depth is shallower toward the rotation direction of the first propeller shaft 12.

  In the clutch device 10 described above, on the opening side of the bottomed cylindrical first rotating member 18, that is, on the second propeller shaft 14 side, the end surface of the outer peripheral side cover member 44 (cover member 34) and the yoke member 62 (electromagnet 60). The exposed end surface 72 and the end surface of the second rotating member 20 are exposed, and these members are relatively rotatable, so that a pair of annular gaps are formed between these members. In order to prevent intrusion of foreign matters such as dust in the outer clearance between the outer cover member 44 and the yoke member 62, as well as being sealed by the shield bearing 66 as described above, It is covered with an annular metal outer side shielding plate 118 fitted into the yoke member 62. The outer peripheral shielding plate 118 has a bottom wall 120 extending from the yoke member 62 to the outer peripheral side, and an inner peripheral surface 122 facing the outer peripheral surface of the cover member 34 with a slight gap therebetween. And an outer peripheral wall 124 extending in the axial direction from the peripheral edge to the first rotating member 18 side. A portion of the outer peripheral surface of the cover member 34 facing the inner peripheral surface 122 of the outer peripheral wall 124 has an extended portion of the thread of the male screw 36 to be screwed into the inner peripheral surface of the first rotating member 18. It has been made. When the vehicle is traveling forward, the first rotating member 18 is rotated counterclockwise with respect to the outer peripheral wall 124, so that the foreign matter discharging action of the thread of the male screw 36, which is a left screw, can be obtained.

  Next, in a gap on the inner peripheral side between the yoke member 62 and the second rotating member 20, a seal device 126 configured in the same manner as a well-known oil seal is mounted, and the inner periphery thereof is installed. The gap on the side is covered with an annular metal inner peripheral shielding member 128 fitted to the yoke member 62 in order to prevent intrusion of foreign matters such as dust. The inner peripheral shielding member 128 includes a bottom wall 130 that covers the gap on the inner peripheral side, and an inner peripheral wall 132 that extends from the inner peripheral edge of the bottom wall 130 toward the second propeller shaft 14 in the axial direction. . A shaft side shielding member 134 is fitted on a portion of the outer peripheral surface of the second propeller shaft 14 between the bearing holding device 90 and the second rotating member 20. The shaft-side shielding member 134 is provided with a large-diameter end portion 136 that is positioned outside the inner peripheral wall 132 on the clutch device 10 side and overlaps the radial direction, covering the gap on the inner peripheral side and sealing performance thereof. The labyrinth seal for further enhancing the pressure is configured.

  In the clutch device 10 configured as described above, the electromagnet 60 is engaged with the engagement protrusion (engagement member) 92 provided on the bearing holding member 86 of the bearing holding device 90 fixed to the vehicle body. Therefore, the vibration from the vehicle body is transmitted to the engagement protrusion 92 and the electromagnet 60 through the buffer member 84, and therefore transmitted from the vehicle body to the electromagnet 60 or the clutch device 10. As a result, the durability of the vehicle driving force transmission control device is sufficiently obtained, and the sound and vibration that the electromagnet 60 contacts with the surrounding coupling mechanism are transmitted to the vehicle interior via the body. There is nothing to do.

  Further, according to the present embodiment, the first propeller shaft 12 and the second propeller shaft 14 (as compared with the case where the engaging protrusion (engaging member) 92 to be engaged with the electromagnet 60 is directly provided on the vehicle body. The mounting of the driving force transmission shaft) on the body is facilitated, and the mounting property to the vehicle is improved, so that the number of mounting considerations can be reduced. Further, since there is no need to change the rotation prevention method and the part shape of the electromagnet 60 for each vehicle, there is no increase in the types of vehicle driving force transmission control devices and driving force transmission shafts, the number of parts is reduced, and the part price is reduced. There is an advantage that it is inexpensive.

  Further, according to the present embodiment, the outer periphery of the electromagnet 60 faces the outer peripheral surface of the cover member 34 fitted in the opening of the bottomed cylindrical first rotating member 18 with a slight gap. An outer peripheral shielding member 118 having an inner peripheral surface 122 is fixed to the electromagnet 60, and at least on the outer peripheral surface of the cover member 34 and facing the inner peripheral surface 122 of the outer peripheral shielding member 118 in the relative rotational direction. As it goes, a thread is formed toward the second propeller shaft 14 side, that is, the outer peripheral shielding member 118 side. That is, when the vehicle moves forward, the propeller shafts 12 and 14 are turned counterclockwise, and the male screw 36 is also formed counterclockwise. For this reason, the foreign matter that tries to enter the gap between the outer peripheral surface of the cover member 34 and the inner peripheral surface 122 of the outer peripheral side shielding member 118 is opened on the outer peripheral side shielding member 118 by the screwing action of the thread. Since it is discharged to the first propeller shaft 12 side, the entry of foreign matter into the gap formed on the outer peripheral side of the electromagnet 60 can be suitably prevented, and the durability of the vehicle driving force transmission control device can be sufficiently obtained. It is done.

  Further, according to the present embodiment, the cover member 34 is fitted to the opening of the bottomed cylindrical first rotating member 18 on the outer peripheral side of the electromagnet 60, and the electromagnet 60 is supported so as to be relatively rotatable. A shield ball bearing 66 is disposed between the inner peripheral surface of the cover member 34 and the outer peripheral surface of the electromagnet 60, and the sealing device 126 is provided between the inner peripheral surface of the electromagnet 60 and the outer peripheral surface of the second rotating member 20. Therefore, among the gaps formed on the outer circumferential side and the inner circumferential side of the non-rotating electromagnet 60, the gap on the outer circumferential side of the electromagnet 60, which is the side where the peripheral speed is large due to relative rotation, is a shield ball bearing. 66, the ring seal device that seals the gap while allowing relative rotation is provided in the gap formed on the outer peripheral side of the electromagnet 60. Thus, sufficient durability is obtained. Rutotomoni, the axial dimension of the clutch device 10 space becomes unnecessary to provide a ring-shaped sealing device is a small, yet less expensive become fewer components.

  Further, according to the present embodiment, the cylindrical electromagnet 60 is composed of the cylindrical yoke member 62 and the annular coil 64 fixed to the first rotating member 18 side of the yoke member 62. The engagement protrusion (engagement member) 92 is engaged with the side surface of the engagement pin 80 erected parallel to the axial direction on the exposed end surface 72 of the yoke member 62 exposed on the opening side of the first rotation member 18. Therefore, there is an advantage that the relative movement in the axial direction of the engagement protrusion 92 supported by the buffer member 84 with respect to the engagement pin 80 is allowed.

  Further, according to the present embodiment, the yoke member 62 is provided with a through hole 68 penetrating in the axial direction, and the lead wire 70 led through the through hole 68 is passed through the yoke member 62 to the first rotating member 18 side. Since the exciting current is supplied to the fixed annular coil 64, the yoke is compared with the case where the lead wire 70 is passed through the groove formed on the outer peripheral surface or the inner peripheral surface of the yoke member 62. Since the unevenness of the outer peripheral surface or inner peripheral surface of the member 64 is eliminated, there is an advantage that the sealing performance for preventing the entry of foreign matter can be easily enhanced.

  Further, according to this embodiment, the lead wire 70 passed through the through hole 68 is connected to the connector 74 fixed to the exposed end surface 72 of the yoke member 62 exposed on the opening side of the first rotating member 18. Therefore, as compared with the case where the connector 74 is fixed to another non-rotating member, the connector 74 is positioned closer to the yoke member 62, so that the reliability against disconnection and the like is increased and the configuration is improved. There is an advantage of being simple.

  Further, according to the present embodiment, the cover member 34 includes the male screw 36 formed on the outer peripheral surface thereof, and is screwed to the inner peripheral side of the bottomed cylindrical first rotating member 18. The outer peripheral shielding member 118 includes a bottom wall 120 and a cylindrical outer peripheral wall 124 formed in the axial direction from the outer peripheral edge of the bottom wall 120, and the bottom wall 120 is on the opening side of the first rotating member 18. A thread that is an extension of the male screw 36 is formed on a portion of the outer peripheral surface of the cover member 34 that is fixed to the exposed end surface 72 of the yoke member 62 and faces the outer peripheral wall 124. The extension portion of the thread of the male screw 36 for screwing the cover member 34 onto the inner peripheral surface of the first rotating member 18 is located at a portion facing the outer peripheral wall 124 of the outer peripheral side shielding member 118. Because it can prevent the intrusion There is an advantage is not necessary to process the threads independently.

  Further, according to the present embodiment, in the gap between the inner peripheral surface of the electromagnet 60 where the sealing device 126 is disposed and the outer peripheral surface of the second rotating member 20, the outer peripheral surface of the second rotating member 20 is covered. Since the needle bearing 40 for supporting the member 34 is a surface to be supported, since the surface is a portion where polishing finish and heat treatment are inherently performed so that the needle bearing 40 is rolled, There is an advantage that no special finishing or heat treatment for the sealing device 126 is required.

  Further, according to this embodiment, the end surface of the inner peripheral cover member 42 is positioned closer to the first propeller shaft 12 than the exposed end surface 72 of the yoke member 62 or the end surface of the outer peripheral cover member 44, and the yoke member 62 is formed so as to cover the end face of the inner peripheral cover member 42, and the inner peripheral face in the vicinity of the exposed end face 72 of the yoke member 62 is made to approach the outer peripheral face of the second rotating member 20. There is an advantage that the gap between the inner peripheral surface of 60 and the outer peripheral surface of the second rotating member 20 is sealed by one sealing device 126.

  Next, the main part of another embodiment of the present invention will be described. In the following description, portions common to the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

  In the clutch device 140 shown in FIG. 6, the end surface of the inner peripheral side cover member 42 is positioned in the same axial direction as the end surface of the outer peripheral side cover member 44 as compared with the above-described embodiments of FIGS. 1 to 5. The exposed end surface 72 of the yoke member 62 is positioned closer to the second propeller shaft 14 than the end surfaces, and on the opening side of the first rotating member 18, the inner peripheral surface of the yoke member 62 and the inner peripheral side cover member The gap between the outer peripheral surface of 42 and the outer peripheral surface of the second rotary member 20 is sealed by a first sealing device 142 provided in the gap, The gap between the two is sealed by a second sealing device 144 provided in the gap, and the common inner peripheral shielding member in which the two gaps are fitted to the shaft end of the second rotating member 20 Point shielded by 146 Different Oite. However, other configurations such as a detent mechanism for the electromagnet 60 are configured in the same manner as in the previous embodiment.

  In the clutch device 148 shown in FIG. 7, a cylindrical second cover member 150 is replaced with a cover member 34 in place of the outer peripheral side shielding member 118 and the lock nut 38 as compared with the above-described embodiments of FIGS. 1 to 5. It is different in that it is screwed onto a male screw 36 formed on the outer peripheral surface of the. At the end of the second cover member 150 on the second propeller shaft 14 side, an inward flange portion 152 that protrudes inward so as to cover the outer peripheral side gap between the inner peripheral surface of the cover member 34 and the outer peripheral surface of the electromagnet 60. The sealing device 154 is disposed between the inward flange portion 152 and the outer peripheral surface of the electromagnet 60. In this case, since the outer circumferential side gap is double-sealed by the sealing device 154 and the shield ball bearing 66, a normal ball bearing may be used instead of the shield ball bearing 66.

  In the clutch device 156 shown in FIG. 8, the exposed end surface 72 of the yoke member 62 is further extended toward the second propeller shaft 14 as compared with the clutch device 148 shown in FIG. 7, and the seal device 154 is covered therewith. The difference is that the shielding member 158 is fitted.

  In the clutch device 160 shown in FIG. 9, the coil 64 of the electromagnet 60 is fixed to the outer peripheral side of the end portion on the first propeller shaft 12 side of the yoke member 62 as compared with the clutch device 148 shown in FIG. 7. The shield ball bearing 66 is different in that it is disposed between the outer peripheral surface of the inner yoke member 42 and the inner peripheral surface of the yoke member 62. In the case of this embodiment, since the shield ball bearing 66 has a small diameter, there is an advantage that the cost of the parts is reduced and the durability is further enhanced.

  In the clutch device 162 shown in FIG. 10, compared to the clutch device 160 shown in FIG. 9, the exposed end surface 72 of the yoke member 62 is further extended to the second propeller shaft 14 side, and the shielding device 126 covers the seal device 126 on that portion. The difference is that the shielding member 158 covering the member 164 and the sealing device 154 is fitted.

  In the clutch device 166 shown in FIG. 11, compared with the clutch device 140 shown in FIG. 6, the end surface of the outer cover member 44 is further extended to the second propeller shaft 14 side. The sealing device 168 is provided in a gap between the outer peripheral surface 62 and the shielding member 170 that covers the sealing device 168 is fitted on the outer peripheral surface of the yoke member 62.

  In the clutch device 174 shown in FIG. 12 and FIG. 13, the lead wire 70 is vertically formed of resin for molding the coil 64 instead of the bracket 76 for supporting the connector 74, as compared with the above-described embodiments of FIGS. 1 to 5. The difference is that the arm 176 and the connector 74 that are passed through are integrally formed.

  As mentioned above, although one Example of this invention was described based on drawing, this invention can be applied also in another aspect.

  For example, the propeller shafts 12 and 14 of the above-described embodiment may be for transmitting driving force from a prime mover such as an electric motor to wheels, or may be disposed on an axle.

  In the above-described embodiment, the engagement protrusion 92 protruding from the bearing holding member 86 is engaged with the engagement pin 80 erected on the exposed end surface 72 of the yoke member 62, so that the electromagnet 60 rotates. However, the tip of the engaging protrusion 92 may be engaged by being inserted into the engaging hole formed in the exposed end surface 72 of the yoke member 62.

  Further, in the above-described embodiment, the engaging protrusion 92 protruding from the bearing holding member 86 functions as the engaging member. However, it protrudes from the outer peripheral ring of the support bearing 82 held by the bearing holding member 86. The formed member may be used as the engaging member.

  Further, in the clutch device 10 of the above-described embodiment, the cover member 34 is screwed into the opening of the bottomed cylindrical first rotating member 18, but other joining means may be used.

  Further, in the clutch device 10 of the above-described embodiment, the inner peripheral surface 122 of the outer peripheral wall 124 of the shielding member 118 is the outer peripheral surface of the cover member 34 screwed into the opening of the bottomed cylindrical first rotating member 18. However, it may be opposed to the male screw formed on the outer peripheral surface of the opening of the first rotating member 18.

  In the clutch device 10 of the above-described embodiment, the cover member 34 is screwed into the opening of the bottomed cylindrical first rotating member 18, but the cover member 34 is the outer peripheral surface of the first rotating member 18. It may be screwed on.

  Further, the ball bearing 22 and the shield ball bearing 66 of the clutch device 10 of the above-described embodiment may be bearings having rolling elements other than balls, and the needle bearings 40 and 100 may be other types of bearings. It doesn't matter.

  Further, in the above-described embodiment, the first rotating member 18 is rotated counterclockwise with respect to the outer peripheral wall 124 during forward traveling of the vehicle, so that the foreign matter discharging action by the thread of the male screw 36 which is a left screw is also obtained. However, when the vehicle is moving backward, the external thread 36 is formed as a right-hand thread, so that the foreign matter discharging action by the thread of the external thread 36 can be obtained as described above.

  In the above-described embodiment, the first propeller shaft 12 is rotated counterclockwise during forward traveling of the vehicle. However, the first propeller shaft 12 may be rotated clockwise. In this case, in order to obtain the foreign matter discharging action by the thread of the male screw 36 that is rotated relative to the outer peripheral wall 124 when the vehicle is traveling forward, the male screw 36 is formed as a right-hand screw.

  The above description is only an example of the present invention, and the present invention can be variously modified without departing from the gist of the present invention.

It is a figure explaining the attachment state of the driving force transmission control device for vehicles of one example of the present invention, with a part cut away. It is a figure which expands and shows the principal part of the vehicle driving force transmission control apparatus of the Example of FIG. 1, Comprising: It is the BB sectional drawing of FIG. It is the figure which looked at the driving force transmission control apparatus for vehicles of the Example of FIG. 1 from the axial direction, Comprising: It is the sectional view on the AA line of FIG. FIG. 4 is a cross-sectional view taken along the line CC of FIG. 3 for explaining a main part of the vehicle driving force transmission control device of the embodiment of FIG. 1. It is the figure seen from the outer peripheral side in order to demonstrate the structure of the engagement protrusion in the Example of FIG. It is sectional drawing explaining the principal part of the driving force transmission control apparatus for vehicles in the other Example of this invention. It is sectional drawing explaining the principal part of the driving force transmission control apparatus for vehicles in the other Example of this invention. It is sectional drawing explaining the principal part of the driving force transmission control apparatus for vehicles in the other Example of this invention. It is sectional drawing explaining the principal part of the driving force transmission control apparatus for vehicles in the other Example of this invention. It is sectional drawing explaining the principal part of the driving force transmission control apparatus for vehicles in the other Example of this invention. It is sectional drawing explaining the principal part of the driving force transmission control apparatus for vehicles in the other Example of this invention. It is sectional drawing explaining the principal part of the driving force transmission control apparatus for vehicles in the other Example of this invention. FIG. 13 is a view of the vehicle driving force transmission control device in the embodiment of FIG. 12 as viewed from the axial direction, and corresponds to FIG. 3.

Explanation of symbols

10: Clutch (vehicle driving force transmission control device)
18: First rotating member 20: Second rotating member 30: Main friction engagement device (friction engagement device)
34: Cover member 36: Male screw (thread)
60: Electromagnet 66: Shielded ball bearing (shielded bearing)
82: Support bearing 118: Outer peripheral side shielding member (shielding member)
122: Inner peripheral surface 126: Sealing device

Claims (2)

A vehicle driving force transmission control device that is arranged in series with a driving force transmission shaft of a vehicle and controls a driving force transmitted by the driving force transmission shaft,
A first rotating member having a bottomed cylindrical shape, and a second rotating member connected to the first rotating member so as to be relatively rotatable about a common axis while being inserted into the first rotating member. ,
A friction engagement device that is provided between the inner peripheral surface of the first rotating member and the outer peripheral surface of the second rotating member and transmits torque from one of them to the other;
In order to control the transmission torque of the friction engagement device, the first rotation member and the second rotation member are provided in the first rotation member so as to be relatively rotatable around a common axis, and A cylindrical electromagnet that is prevented from rotating by being connected to a non-rotating member;
A cover member fitted to an opening of the bottomed cylindrical first rotating member on the outer peripheral side of the electromagnet;
An opening portion of the bottomed cylindrical first rotating member or an inner peripheral surface facing the outer peripheral surface of the cover member exposed from the opening portion with a slight gap, the cover member and the electromagnet A shielding member fixed to the opposite side of the first rotating member side of the electromagnet in the axial direction so as to cover the gap between
The first rotating member or the cover on the opening of the bottomed cylindrical first rotating member or on the outer peripheral surface of the cover member exposed from the opening and facing at least the inner peripheral surface of the shielding member A vehicular driving force transmission control device, comprising: a thread formed so as to be directed toward the shielding member as the member moves in a rotational direction during forward traveling of the vehicle . A shield bearing disposed between an inner peripheral surface of the cover member and an outer peripheral surface of the electromagnet to support the electromagnet so as to be relatively rotatable;
The vehicle driving force transmission control device according to claim 1, further comprising: a sealing device disposed between an inner peripheral surface of the electromagnet and an outer peripheral surface of the second rotating member.

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