JP2005090678A - Rotation transmission device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a trouble from occurring due to the entry of foreign matter mixed in a lubricating oil into a clutch part in a rotation transmission device controlling the on/off of the mechanical type 2-way clutch part by an electromagnetic clutch. <P>SOLUTION: This rotation transmission device is formed so that a roller type 2-way clutch 10 can be installed between a cam ring 5 and an outer ring 6 on an input shaft 4. The electromagnetic clutch 20 controlling the on/off of the 2-way clutch part 10 is incorporated in the end part of the outer ring 6. A foreign matter entry prevention means 40 is installed in an oil supply path 30 formed between the rotor 23 of the electromagnetic clutch 20 and the input shaft 4. The entry of the foreign matter mixed in the oil into the outer ring 6 is prevented by the foreign matter entry prevention means 40 to prevent the trouble from occurring due to the entry of foreign matter. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotation transmission device used for switching between transmission and cutoff of power in a power transmission path of a vehicle.

  As this type of rotation transmission device, one described in Patent Document 1 has been conventionally known. In this rotation transmission device, a cam ring is provided on an input shaft to which rotational torque is transmitted from an output shaft of a transmission, and an outer ring provided on the outer side of the cam ring is rotatably supported relative to the input shaft. A roller clutch is provided between the outer ring and the outer ring, and an electromagnetic clutch for controlling on / off of the roller clutch is incorporated in the end of the outer ring.

  Here, the roller clutch portion is provided between the cam surface and the cylindrical surface by providing a cam surface that forms a wedge-shaped space between the outer periphery of the cam ring and the cylindrical surface formed on the inner periphery of the outer ring. The roller is held by a cage incorporated between the cam ring and the outer ring, and the cage is elastically held at a neutral position where the roller is disengaged by applying the spring force of the switch spring to the cage.

  On the other hand, an electromagnetic clutch has a coil wound around a field core, and is energized to the coil to prevent a rotor from rotating about an axially movable armature. It is adsorbed to couple the cage to the outer ring.

  In the rotation transmission device configured as described above, when the armature is attracted to the rotor by energizing the coil of the electromagnetic clutch and the cage is coupled to the outer ring, the cam ring and the cage rotate relative to each other so that the roller is a cylindrical surface and a cam surface. And the rotation of the input shaft is transmitted to the outer ring through the roller.

  When the energization of the coil of the electromagnetic clutch is interrupted, the cage is returned to the neutral position by the spring force of the switch spring, the engagement of the roller with the cylindrical surface and the cam surface is released, and only the input shaft rotates.

Since the rotation transmission device as described above is used in a high-temperature atmosphere in the transmission and also has a high rotational speed during idling, it is not possible to employ a lubrication method in which the roller clutch portion is lubricated with grease. In general, the oil in the transmission is lubricated by flowing into the roller clutch portion.
Japanese Patent Laid-Open No. 10-211828

  By the way, in the rotation transmission device in which the roller clutch portion is lubricated by the inflow of oil in the transmission, foreign matter such as wear powder is often mixed in the oil in the transmission, and the foreign matter is contained in the rotation transmission device together with the oil. If the air enters the space between the armature of the electromagnetic clutch and the rotor, the torque of the electromagnetic clutch is reduced, and the two-way roller clutch portion may not be able to be engaged.

  In addition, when the foreign matter enters the roller clutch portion, foreign matter accumulates on the cam surface, filling a gap necessary for idling, and there is a possibility that the roller is suddenly locked during idling.

  An object of the present invention is to prevent occurrence of trouble due to entry of foreign matter in a rotation transmission device that supplies oil in the transmission and lubricates the clutch portion to prevent foreign matter mixed in the lubricating oil from entering the inside. Is to prevent this.

  In order to solve the above problems, in the present invention, the input side member and the output side member provided on the outside thereof are relatively rotatably supported, and between the input side member and the output side member, A mechanical type two-way clutch is provided to couple the input side member and the output side member by the engagement of the engagement member held by the cage, and the spring force of the switch spring is applied to the cage of the two-way clutch portion. The engagement element is held at the neutral position where the engagement is released, and an armature that is prevented from rotating with respect to the cage by energizing the coil is attracted to the rotor fitted to the output side member inside the output side member. An electromagnetic clutch for coupling the retainer to the output side member is incorporated, and an oil supply path is provided between the inner periphery of the rotor of the electromagnetic clutch and the outer periphery of the input side member, and the oil flowing into the oil supply path In the rotation transmitting device designed to lubricate the direction clutch unit is to that adopted the configuration in which a foreign matter intrusion prevention means for preventing the passage of foreign matter oil in the oil supply passage.

Here, as a foreign matter intrusion prevention means,
i) A structure in which a shielding plate is attached to the outer periphery of the input side member, and a minute clearance is formed between the outer periphery of the shielding plate and the inner periphery of the rotor.
ii) A structure in which a shielding plate is attached to the inner periphery of the rotor, and a minute gap is formed between the inner periphery of the shielding plate and the outer peripheral surface of the input side member.
iii) A structure in which a shielding plate is attached to each of the outer periphery of the input side member and the inner periphery of the rotor, facing each other in the axial direction, and a minute gap is formed between the opposing surfaces of the shielding plate.
iv) A structure in which a mesh seal is attached to one end of a rolling bearing that is supported on the outer periphery of the input side member and rotatably supports the input side member and the rotor;
v) A structure in which a non-contact type seal is attached to one end of a rolling bearing that is supported on the outer periphery of the input side member and rotatably supports the input side member and the rotor;
vi) There are provided a shielding plate attached to the outer periphery of the input side member, and a plurality of lips attached to the inner periphery of the rotor, facing the shielding plate in the axial direction, and forming a labyrinth with the shielding plate. Lip seals,
Can be adopted respectively.

  As described above, foreign matter intrusion prevention means is provided in the oil supply path formed between the outer periphery of the input side member and the inner periphery of the rotor of the electromagnetic clutch. Since only the clean oil can be supplied to the inside, the electromagnetic clutch cannot be operated due to the intrusion of foreign matter, or the engaging element is suddenly locked during idling. It is possible to prevent the occurrence of troubles.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a state where a rotation transmission device according to the present invention is incorporated in a transmission mission case.

  As shown in the figure, a shaft insertion hole 3 is formed in the partition wall 2 provided in the transmission case 1, and the input shaft 4 as an input side member inserted through the shaft insertion hole 3 rotates the output shaft of the transmission. It is to be transmitted.

  The input shaft 4 has a cam ring 5 at its end, and an outer ring 6 as an output side member is provided outside the cam ring 5. The outer ring 6 and the input shaft 4 are relatively rotatable via a bearing 7. It is supported.

  A mechanical type two-way clutch portion 10 is provided between the cam ring 5 and the outer ring 6. In addition, an electromagnetic clutch 20 for controlling on and off of the two-way clutch 10 is incorporated in the opening end of the outer ring 6 on the partition wall 2 side.

  As shown in FIGS. 1 and 3, the two-way clutch unit 10 forms a cylindrical surface 11 on the inner periphery of the outer ring 6, and forms a wedge-shaped space with the cylindrical surface 11 on the outer periphery of the cam ring 5. A plurality of cam surfaces 12 are provided at equal intervals in the circumferential direction, a roller 13 as an engaging member is incorporated between each cam surface 12 and the cylindrical surface 11, and each roller 13 is incorporated between the cam ring 5 and the outer ring 6. It consists of a two-way clutch part of the roller type held by

  As shown in FIG. 1, a spring housing recess 15 is formed on one end surface of the cam ring 5, and a switch spring 16 is incorporated in the spring housing recess 15.

  The switch spring 16 has a C shape, and a pair of pressing pieces 16 a provided at both ends thereof are provided in a notch 18 formed at the end of the cage 14 from a notch 17 formed on the outer peripheral wall of the spring housing recess 15. Is inserted into the notch 17 and the notch 17 and the notch 18 are pressed against the circumferentially opposed end faces in opposite directions, and the roller 13 is disengaged from the cylindrical surface 11 and the cam surface 12 by the pushing. The cage 14 is elastically held at the position.

  The electromagnetic clutch 20 that controls the two-way clutch portion 10 is fitted into the field core 21 supported by the partition wall 2, the coil 22 wound around the field core 21, and the opening end portion of the outer ring 6, and the outer ring 6. The rotor 23 is made of a magnetic material that is axially opposed to the field core 21 and is opposed to the rotor 23 in the axial direction, is prevented from rotating with respect to the retainer 14, and is movable in the axial direction. A separation spring 25 is incorporated between the rotor 23 and the armature 24, and the separation spring 25 presses the armature 24 in a direction away from the rotor 23.

  In order to prevent the armature 24 from rotating with respect to the retainer 14, here, an L-shaped connecting plate 26 is fitted into the end of the retainer 14, and the connecting plate 26 is provided at a position facing the outer periphery. The engaging claw 27 is fitted into the notch 18 formed at the end of the retainer 14 and is inserted into the engaging hole 28 provided in the armature 24.

  In order to increase the magnetic attractive force of the rotor 23, a plurality of slits 24a are provided at intervals in the circumferential direction, and a lid or filter 24b made of a magnetic material is provided in each slit 24a. The rotor 23 and the input shaft 4 are relatively rotatably supported by a rolling bearing 29 incorporated between both parts. An oil supply path 30 is formed between the rotor 23 and the input shaft 4, and oil in the transmission is supplied to the oil supply path 30 from the shaft insertion hole 3 and introduced into the outer ring 6, and the two-way clutch portion 10 and the like. Is oil lubricated.

  Now, when the coil 22 of the electromagnetic clutch 20 is energized while the input shaft 4 is rotating, the armature 24 moves to a position where it is attracted to the rotor 23 against the elasticity of the separation spring 25, and the armature 24 moves to the outer ring 6. Combined.

  At this time, since the frictional resistance acting on the contact portion between the armature 24 and the rotor 23 is set to a value larger than the spring force of the switch spring 16, the switch spring 16 is elastically deformed so that the input shaft 3 and the cage 14 are The roller 13 is engaged with the cylindrical surface 11 and the cam surface 12 by the relative rotation, and the rotation of the input shaft 4 is transmitted to the outer ring 6 through the roller 13.

  In the state of torque transmission from the input shaft 4 to the outer ring 6, when the power supply to the coil 22 is cut off, the roller 14 is disengaged from the cylindrical surface 11 and the cam surface 12 by the spring force of the switch spring 16. Returned to the neutral position. For this reason, torque transmission to the outer ring 6 is interrupted, and the input shaft 4 idles.

  Here, the rotation transmission device is oil lubrication that supplies oil in the transmission from the shaft insertion hole 3 into the oil supply passage 30 and introduces the oil into the outer ring 6 from the oil supply passage 30. If the foreign matter enters between the rotor 23 and the armature 24, the torque of the electromagnetic clutch 20 is reduced and the two-way clutch portion 10 may not be engaged. is there. Further, there is a concern that external oil including foreign matter may enter from a gap formed between the field core 21 and the rotor 23 and the foreign clutch cannot be engaged by the foreign matter.

  Further, if foreign matter accumulates on the cam surface 12 of the two-way clutch portion 10 and a gap necessary for idling cannot be secured between the roller 13 and the cam surface 12, the roller 13 may be locked suddenly. Occurs.

  In order to prevent such troubles from occurring, a foreign matter intrusion prevention means 40 is provided in the oil supply passage 30 to block the passage of foreign matters mixed in the oil and prevent the foreign matters from entering the outer ring 6. I am doing so.

  2, FIG. 4 (I), (II) thru | or FIG. 7 has shown each example of the foreign material penetration | invasion prevention means 40. FIG.

  The foreign matter intrusion prevention means shown in FIG. 2 has a shielding plate 41 attached to the outer periphery of the input shaft 4, and a minute gap 42 is formed between the outer periphery of the shielding plate 41 and the inner peripheral surface of the rotor 23 to prevent foreign matter from passing therethrough. Yes.

  The foreign matter intrusion prevention means 40 shown in FIG. 4 (I) has a shielding plate 43 attached to the inner periphery of the rotor 23, and a minute clearance that prevents the passage of foreign matter between the inner periphery of the shielding plate 43 and the outer peripheral surface of the input shaft 4. 44 is formed.

  The foreign matter intrusion prevention means 40 shown in FIG. 4 (II) has shielding plates 45 and 46 attached to the outer periphery of the input shaft 4 and the inner periphery of the rotor 23 so as to face each other in the axial direction. A minute clearance 47 that prevents passage is formed.

  The foreign matter intrusion preventing means 40 shown in FIG. 5 has a seal 48 made of a mesh attached between one end portions of an outer ring 29a and an inner ring 29b of a rolling bearing 29 that relatively rotatably supports the input shaft 4 and the rotor 23. The seal 48 prevents passage of foreign matter.

  The foreign matter intrusion prevention means 40 shown in FIG. 6 is non-contacting with the outer peripheral surface of the inner ring 29b on the inner peripheral surface of one end of the outer ring 29a of the rolling bearing 29 that relatively rotatably supports the input shaft 4 and the rotor 23. A contact type seal 49 is attached, and the passage of foreign matter is prevented by a minute gap 50 formed between the inner periphery of the non-contact type seal 49 and the outer peripheral surface of the inner ring 29b.

  The foreign matter intrusion prevention means 40 shown in FIG. 7 has a shielding plate 51 attached to the outer periphery of the input shaft 4, and a lip seal 52 facing the shielding plate 51 in the axial direction is attached to the inner periphery of the end of the rotor 23. A labyrinth 54 is formed between the plurality of lips 53 formed on one side of the 52 and the shielding plate 51 so as to prevent passage of foreign matter.

  As described above, by providing the foreign matter intrusion prevention means 40 in the oil supply path 30, it is possible to prevent the passage of foreign matters mixed in the oil, and therefore various troubles due to the entry of foreign matters can be prevented in advance.

  In the embodiment shown in FIG. 1, the cylindrical surface 11 is formed on the inner periphery of the outer ring 6 and the cam surface 12 is formed on the outer periphery of the cam ring 5, but the cam surface is formed on the inner periphery of the outer ring 6. A cylindrical surface may be formed. In this case, the rotor 23 of the electromagnetic clutch 20 is prevented from rotating with respect to the input shaft 4.

  In the embodiment shown in FIG. 1, the roller 13 is an engaging element, but a sprag may be an engaging element. When the sprag is used as an engagement element, a cylindrical surface is formed on the inner circumference of the outer ring and the outer circumference of the cam ring, the sprag is held by two cages having different diameters, and the cage on the small diameter side is held with respect to the input shaft. The rotation is stopped, and the rotation of the large-diameter side retainer is controlled by an electromagnetic clutch so that the sprag is engaged and disengaged.

  The foreign matter intrusion prevention means 40 as shown in FIGS. 2, 4 (I), (II) to FIG. 7 can also be applied to the mechanical type two-way clutch shown in FIGS.

  Here, the two-way clutch shown in FIGS. 8 and 9 supports an outer ring 61 as an outer member and a shaft 62 as an inner member provided inside the outer ring 61 via a bearing 63 so as to be relatively rotatable. A cam surface 65 is provided on the inner periphery of the clutch outer ring 64 press-fitted inside the outer ring 61, and a cylindrical surface 67 is formed on the outer periphery of the cam ring portion 66 provided on the shaft 62. The cylindrical surface 67 and the cam surface A roller 68 is assembled as an engaging member between the rollers 65, and the roller 68 is accommodated in a pocket 70 formed in a retainer 69. The roller 68 is held in a neutral position by a pair of spring pieces 71 provided on both sides thereof. The roller 68 is engaged with the cam surface 65 and the cylindrical surface 67 by controlling the rotation of the retainer 69.

  In the two-way clutch as described above, when oil is introduced into the outer ring 61 from the oil supply path 72 formed between the shaft 62 and the retainer 69 to lubricate the clutch portion, foreign matter enters the oil supply path 72. By providing the prevention means 40, it is possible to prevent foreign matters mixed in the oil from entering the outer ring 61, so that it is possible to prevent troubles due to the inclusion of foreign matters.

  The two-way clutch shown in FIGS. 10 and 11 supports an outer ring 80 as an outer member and a shaft 81 as an inner member provided inside the outer ring 80 so as to be relatively rotatable by a bearing 82. Two retainers 85 and 86 having different diameters are assembled between a cylindrical surface 83 formed on the inner periphery and a cylindrical surface 84 formed on the outer periphery of the shaft 81, and are engaged with a pocket 87 formed in each retainer 85 and 86. A sprag 88 as a mating member is accommodated, and a pair of spring pieces 89 for holding the sprag 88 in a neutral position are provided on both sides of the sprag 88 in the pocket 87 of the small diameter side retainer 86. The sprag 88 is engaged with the cylindrical surface 83 of the outer ring 80 and the cylindrical surface 84 of the shaft 81 by controlling the rotation of the small-diameter side retainer 86.

  In the two-way clutch as described above, when oil is introduced into the outer ring 80 from the oil supply passage 90 formed in the shaft 81 and the small-diameter side retainer 86 and the clutch portion is lubricated, foreign matter is introduced into the oil supply passage 90. By providing the intrusion prevention means 40, it is possible to prevent foreign matters mixed in the oil from entering the outer ring 80, so that troubles due to the inclusion of foreign matters can be prevented in advance.

A longitudinal front view showing an embodiment of a rotation transmission device according to the present invention Sectional drawing which expands and shows the incorporating part of the foreign material penetration | invasion prevention means shown in FIG. Sectional view along line III-III in FIG. (I), (II) are sectional views showing other examples of foreign matter intrusion prevention means Sectional drawing which shows the other example of a foreign material intrusion prevention means Sectional drawing which shows the other example of a foreign material intrusion prevention means Sectional drawing which shows the further another example of a foreign material penetration | invasion prevention means Sectional view showing a two-way clutch Vertical side view of FIG. Sectional view showing a two-way clutch Vertical side view of FIG.

Explanation of symbols

4 Input shaft (input side member)
6 Outer ring (output side member)
DESCRIPTION OF SYMBOLS 10 Two-way clutch part 11 Cylindrical surface 12 Cam surface 13 Roller 14 Cage 16 Switch spring 20 Electromagnetic clutch 22 Coil 23 Rotor 24 Armature 29 Rolling bearing 30 Oil supply path 40 Foreign matter intrusion prevention means 41, 43, 45, 46 Shielding plate 42 , 44, 47, 50 Minute clearance 48 Mesh seal 49 Non-contact seal 51 Shield plate 52 Lip seal 53 Lip 54 Labyrinth

Claims (7)

  An input side member and an output side member provided outside the input side member are relatively rotatably supported, and the input side member is held between the input side member and the output side member by the engagement of an engagement member held by a cage. A mechanical-type two-way clutch unit that couples the member and the output side member is provided, and the spring force of the switch spring is applied to the cage of the two-way clutch unit to hold the engaging element in the neutral position where the engagement is released. An electromagnetic clutch that couples the retainer to the output side member by adsorbing the armature that is prevented from rotating with respect to the cage by energization of the coil to the rotor fitted to the output side member is provided inside the output side member. Built-in rotation transmission device provided with an oil supply path between the inner periphery of the rotor of the electromagnetic clutch and the outer periphery of the input side member, and lubricates the two-way clutch portion with oil flowing into the oil supply path Oite rotation transmission apparatus characterized in that a foreign matter intrusion prevention means for preventing the passage of foreign matter in the oil to the oil supply passage.   The rotation transmission device according to claim 1, wherein the foreign matter intrusion prevention means has a configuration in which a shielding plate is attached to the outer periphery of the input side member, and a minute clearance is formed between the outer periphery of the shielding plate and the inner periphery of the rotor.   The rotation transmission device according to claim 1, wherein the foreign matter intrusion prevention means has a configuration in which a shielding plate is attached to the inner periphery of the rotor, and a minute clearance is formed between the inner periphery of the shielding plate and the outer peripheral surface of the input side member.   2. The foreign matter intrusion prevention means comprises a configuration in which a shielding plate is attached to each of the outer periphery of the input side member and the inner periphery of the rotor and is opposed in the axial direction, and a minute gap is formed between the opposing surfaces of the shielding plate. The rotation transmission device described.   2. The foreign matter intrusion preventing means comprises a structure in which a mesh seal is attached to one end of a rolling bearing supported on the outer periphery of the input side member and rotatably supporting the input side member and the rotor. The rotation transmission device described.   The foreign matter intrusion prevention means comprises a configuration in which a non-contact type seal is attached to one end of a rolling bearing that is supported on the outer periphery of the input side member and relatively rotatably supports the input side member and the rotor. Item 2. The rotation transmission device according to Item 1.   The foreign matter intrusion prevention means includes a shielding plate attached to the outer periphery of the input side member, and a plurality of members that are attached to the inner periphery of the rotor, face the shielding plate in the axial direction, and form a labyrinth between the shielding plates. The rotation transmission device according to claim 1, comprising a lip seal provided with a lip.

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