JP2010091039A - Connection device - Google Patents

Abstract

Provided is a connecting device that can accurately perform lubrication of a spline connecting portion with a simple configuration without complicating the device configuration.
A first shaft 5 having a male spline portion 3 on the outer periphery and a second shaft 9 having a female spline portion 7 on the inner periphery are connected to connect the male spline portion 3 and the female spline portion 7. In the coupling device 1 capable of transmitting a driving force, a sealing wall 11 is formed on the second shaft 9 on one side in the axial direction with respect to the female spline portion 7, and the second wall 9 is connected to the second side in the axial direction on the other side in the axial direction. Seal means 17 is disposed between the outer peripheral portion 13 of the single shaft 5 and the inner peripheral portion 15 of the second shaft 9 on the other axial side with respect to the female spline portion 7, and the male spline portion 3 and the female spline portion 7 Grease was applied to the meshing part 19.
[Selection] Figure 2

Description

  The present invention relates to a connecting device applied to a vehicle.

  Conventionally, the spline connection is generally used for the connection between the two rotating shafts of the connecting device. Since the drive torque transmitted between the two shafts acts on the spline tooth surface in this spline connecting part, in order to suppress the progress of tooth surface wear, it is placed in an oil lubrication environment or grease is applied. is doing.

  As for what is arranged in the oil lubrication environment, a hollow portion is provided in the support shaft, the support shaft is splined to the hollow portion, and this spline connection portion is arranged in the oil lubrication environment in the transfer case. (For example, refer to Patent Document 1).

In order to supply independent oil such as grease, the spline connecting portion at the right end of the drive shaft is connected to a mating member connected to the axle, and this spline connecting portion includes oil provided in the casing. One in which oil is supplied from a road is known (see, for example, Patent Document 2).
JP 2001-47884 A JP 2008-57633 A

  However, in the structure of Patent Document 1, the spline connecting portion is intended to be lubricated by the oil in the casing, but the spline connecting portion is located near the axis above the oil level of the oil reservoir. In addition, the oil cannot be immersed in the oil, and it is difficult to take in the scattered oil due to the rotation of the rotating member.

  Further, if the oil level of the oil is raised, that is, if the amount of oil in the casing is increased in order to lubricate the spline connecting portion, the oil stirring resistance by the rotating member increases and the driving loss increases.

  Furthermore, in the structure of the above-mentioned Patent Document 2, in order to lubricate the spline connecting portion, the shape of the casing is complicated, and the weight of the apparatus is increased.

  Accordingly, an object of the present invention is to provide a connecting device that can accurately perform the lubrication of the spline connecting portion with a simple configuration without complicating the device configuration.

  The invention according to claim 1 includes a first shaft having a male spline portion on the outer periphery and a second shaft having a female spline portion on the inner periphery, and connects the male spline portion and the female spline portion. The second shaft has a sealing wall formed on one side in the axial direction with respect to the female spline portion, and is connected to the other side in the axial direction with respect to the male spline portion. Seal means is disposed between the outer peripheral portion of the first shaft and the inner peripheral portion of the second shaft on the other axial side with respect to the female spline portion, and the male spline portion and the female spline portion are engaged with each other. It is characterized in that grease is applied to the part.

  The invention according to claim 2 is the coupling device according to claim 1, wherein the sealing means is fixed to the outer peripheral portion, and is fixedly provided on the outer diameter side of the fixing member. It consists of the sealing material which contacts the said inner peripheral part so that sliding is possible, It is characterized by the above-mentioned.

  The invention according to claim 3 is the connecting device according to claim 1 or 2, wherein the outer peripheral portion is formed to have a larger diameter than the outer diameter of the male spline portion, and the inner peripheral portion is an inner diameter of the female spline portion. It is characterized by having a larger diameter.

  According to a fourth aspect of the present invention, there is provided the coupling device according to any one of the first to third aspects, wherein the inner peripheral portion extends in an axial direction from an end side of the female spline portion. It is a part.

  A fifth aspect of the present invention is the coupling device according to any one of the first to fourth aspects, wherein the axial position between the first axis and the second axis is defined. A clip is provided.

  A sixth aspect of the present invention is the coupling device according to any one of the first to fifth aspects, wherein the first shaft or the second shaft is opposed to the first shaft or the second shaft between the first shaft and the second shaft. A recess is formed in at least one of the second shafts.

  A seventh aspect of the present invention is the coupling device according to the second aspect, wherein an inner diameter of the fixing member is formed larger than an outer diameter of the male spline portion, and the sealing means is on one side in the axial direction of the first shaft. Passing through the outer periphery of the male spline part in the axial direction and assembled and fixed to the outer peripheral part, and the inner peripheral part passes through the outer periphery of the male spline part in the axial direction from one axial direction side of the first shaft. And abutting against the sealing material.

  According to the first aspect of the present invention, since the sealing wall and the sealing means are provided on both sides in the axial direction of the meshing portion between the male spline portion and the female spline portion, the grease applied to the meshing portion flows out from the meshing portion. This can be surely prevented.

  Further, since the grease can be sealed in the meshing portion, it is not necessary to increase the amount of oil in the apparatus or separately provide an oil supply path to the meshing portion.

  Therefore, the spline connecting portion can be lubricated accurately with a simple configuration without complicating the device configuration.

  According to a second aspect of the present invention, there is provided a coupling device comprising: a fixing member in which the sealing means is fixed to the outer peripheral portion; and a sealing material fixed to the outer diameter side of the fixing member and slidably contacting the inner peripheral portion. Therefore, by fixing the fixing member to the outer peripheral portion and meshing the male spline portion and the female spline portion, the sealing means can be arranged at a regular position, and the assembling property can be improved.

  The coupling device of claim 3 can prevent damage to the sealing means at the time of assembly by defining the dimensions of each spline part, the outer peripheral part and the inner peripheral part.

  In the connecting device according to the fourth aspect of the present invention, the inner peripheral portion is an annular protrusion that extends in the axial direction from the end side of the female spline portion. And it can be made into a compact shape.

  Since the clip which prescribes | regulates a mutual axial direction position is provided between the 1st axis | shaft and the 2nd axis | shaft in the coupling device of Claim 5, the axial direction position of both axes is controlled, a spline meshing part and a seal Wear of the sliding portion of the means can be prevented.

  In the connecting device according to the sixth aspect, since the concave portion is formed in at least one of the first shaft and the second shaft between the first shaft and the second shaft facing each other in the axial direction, the grease is applied to the meshing portion. It can be a grease reservoir.

  According to the seventh aspect of the present invention, when the coupling device is assembled, the sealing material does not interfere with the spline portion, and the sealing material can be prevented from being damaged. Therefore, it is possible to improve the reliability during assembly and operation of the coupling device.

  A power transmission device to which a coupling device according to an embodiment of the present invention is applied will be described with reference to FIG. Here, although the connecting device 1 of the first embodiment is used, the connecting device according to the other embodiments can be applied to the power transmission device in the same manner as the connecting device 1 of the first embodiment. it can.

  As shown in FIG. 1, the power transmission device 201 includes an intermittence mechanism 203 and a conversion mechanism 205, and the intermittence mechanism 203 is connected to transmit driving force to the coupling device 1.

  The intermittent mechanism 203 includes a hollow shaft 207, a cylindrical rotating member 209, a shaft-shaped rotating member 211, a main clutch 213, a pilot mechanism 215, and an electromagnet 217.

  The hollow shaft 207 is formed in a hollow shape, and the outer peripheral side is rotatably supported by the casing 223 via bearings 219 and 221. A spline-shaped connecting portion 225 is formed on the outer periphery on one end side of the hollow shaft 207, and a rotating member (not shown) for inputting driving force is connected thereto. This input driving force is transmitted to a ring gear 227 of a conversion mechanism 205 (described later) fixed to the outer periphery of the hollow shaft 207 with a bolt. A spline-shaped connecting portion 229 is formed on the inner periphery of the other end of the hollow shaft 207, and a cylindrical rotating member 209 is connected.

  The cylindrical rotating member 209 includes a clutch housing 231 and a rotor housing 233. One end side of the clutch housing 231 is coupled to the hollow shaft 207 by a coupling portion 229 so as to be integrally rotatable. The other end side of the clutch housing 231 is fixed to the rotor housing 233 so as to be integrally rotatable by a double nut function including a screw-shaped connecting portion 235 formed on the inner periphery and a nut 237. The rotor housing 233 is made of a magnetic material and transmits magnetic lines of force of an electromagnet 217 described later. On the inner peripheral side of the cylindrical rotating member 209, an axial rotating member 211 is disposed so as to be rotatable relative to the cylindrical rotating member 209.

  The shaft-like rotating member 211 is supported on the cylindrical rotating member 209 via the X ring 239, the bearing 241, the sliding ring 243, and the X ring 245 at both ends in the axial direction. One axial end side of the shaft-like rotating member 211 is formed in a cylindrical shape, and a female spline portion 7 is formed on the inner periphery. A male spline portion 3 formed on a drive shaft 247 as a first shaft of the coupling device 1 described later is spline-coupled to the female spline portion 7 so that the shaft-like rotating member 211 and the drive shaft 247 can rotate integrally. Connected to Further, the other axial side of the shaft-like rotating member 211 is formed in a shaft shape, and the male spline portion 3 is formed on the outer periphery. The male spline portion 3 is spline-coupled with a female spline portion 7 formed on a joint member 249 as a second shaft of the connecting device 1 to be described later, and a shaft-shaped rotating member 211, a drive shaft 247, a joint member 249, Are connected so as to be integrally rotatable. The shaft-like rotating member 211 is intermittently connected to the cylindrical rotating member 209 by the main clutch 213.

  The main clutch 213 is disposed between the cylindrical rotating member 209 and the shaft-shaped rotating member 211, and includes a plurality of outer clutch plates and a plurality of inner clutch plates. The plurality of outer clutch plates are axially movable on the inner periphery of the clutch housing 231 and engaged with a cylindrical rotating member 209 so as to be integrally rotatable. The plurality of inner clutch plates are alternately arranged in the axial direction with respect to the plurality of outer clutch plates, and are engaged with the outer periphery of the shaft-like rotating member 211 so as to be axially movable and integrally rotatable with the shaft-like rotating member 211. Has been. The main clutch 213 is actuated by a pilot mechanism 215 to connect and disconnect the cylindrical rotating member 209 and the shaft-shaped rotating member 211.

  The pilot mechanism 215 includes a cam mechanism 251, a pilot clutch 253, and an armature 255. The cam mechanism 251 includes a cam ball 261 interposed between the pressure ring 257 and the cam ring 259 so that the cam surfaces formed in the circumferential direction face each other. The pressure ring 257 is engaged with the outer periphery of the shaft-shaped rotating member 211 on the inner peripheral side so as to be axially movable and integrally rotatable with the shaft-shaped rotating member 211. The cam ring 259 is disposed on the outer periphery of the shaft-like rotating member 211 so as to be movable in the axial direction. A thrust bearing 263 that receives a thrust reaction force generated by the cam mechanism 251 is disposed between the cam ring 259 and the rotor housing 233. The cam ball 261 is disposed between the pressure ring 257 and the cam ring 259. The cam ball 261 causes the pressure ring 257 to move to the main clutch 213 side with the strength corresponding to the friction torque generated in the pilot clutch 253 by causing a differential rotation between the pressure ring 257 and the cam ring 259 due to the connection of the pilot clutch 253. A cam thrust force is generated for axial movement.

  The pilot clutch 253 has a plurality of outer clutch plates that are axially movable on the inner periphery of the clutch housing 231 and engage with the cylindrical rotating member 209 so as to rotate integrally therewith, and a plurality of outer clutch plates on the outer periphery of the cam ring 259. The plurality of inner clutch plates are arranged alternately in the axial direction, are movable in the axial direction, and engage with the cam ring 259 so as to rotate together. The pilot clutch 253 is engaged by the suction movement of the armature 255.

  The armature 255 is made of a magnetic material, is disposed to face the rotor housing 233 with the pilot clutch 253 interposed therebetween in the axial direction, and is engaged with the inner periphery of the clutch housing 231 so as to be movable in the axial direction. The armature 255 is attracted to the electromagnet 217 side by supplying power to the electromagnet 217 to connect the pilot clutch 253.

  The electromagnet 217 includes an electromagnetic coil 265 and a core 267, and is supported on the rotor housing 233 via a bearing 269. The core 267 is provided with a connector 273 that is connected to a controller (not shown) that controls power feeding via a lead wire 271, and an electromagnetic coil that generates a necessary friction torque in the main clutch 213 under the control of the controller. Power is supplied to H.265. Further, the electromagnet 217 is prevented from rotating with respect to the casing 223 by a rotation preventing member 275. By supplying power to the electromagnet 217, magnetic lines of force through the core 267, the rotor housing 233, the pilot clutch 253, and the armature 255 are circulated to form a magnetic flux loop, and the armature 255 is attracted and moved to the electromagnet 217 side.

  In such an intermittent mechanism 203, the armature 255 is attracted and moved by power feeding to the electromagnet 217, the armature 255 presses the pilot clutch 253, and the pilot clutch 253 is connected. When the pilot clutch 253 is connected, a cam thrust force is generated by the cam mechanism 251 and the pressure ring 257 is pressed and moved to the main clutch 213 side. The main clutch 213 is connected by the movement of the pressure ring 257, the cylindrical rotating member 209 and the shaft-shaped rotating member 211 are connected, and the drive shaft 247 and the joint member 249 connected to the shaft-shaped rotating member 211, The driving force is transmitted to. Further, the driving force transmitted to the hollow shaft 207 is converted by the conversion mechanism 205 and directly transmitted to the drive shaft 279 side.

  The conversion mechanism 205 includes a conversion gear set 277 and a drive shaft 279. The conversion gear set 277 includes a ring gear 227 fixed to the hollow shaft 207 so as to be integrally rotatable, and a drive pinion 281 that meshes with the ring gear 227. The drive shaft 279 is rotatably supported by the casing 223 at both ends in the axial direction via bearings 283 (the other side is not shown). This drive shaft 279 is provided integrally with the drive pinion 281, and transmits the driving force transmitted to the hollow shaft 207 to the other side in the axial direction via the conversion gear set 277.

  The casing 223 of such a power transmission device 201 is partitioned by a plurality of sealing means. Seals 285, 287, and 289 are disposed between the casing 223 and the hollow shaft 207, between the casing 223 and the clutch housing 231, and between the casing 223 and the joint member 249. In addition, O-rings 291, 293, 295, and 297 are disposed between the hollow shaft 207 and the clutch housing 231 at the connection portion of the casing 223. In the interior partitioned by these sealing means, oil that lubricates the sliding portion on the outer peripheral side of the hollow shaft 207, the conversion mechanism 205, and the like is sealed.

  Further, X rings 239 and 245 are arranged between the clutch housing 231 and the shaft-like rotating member 211 and between the rotor housing 233 and the shaft-like rotating member 211. An O-ring 299 is disposed between the clutch housing 231 and the rotor housing 233. In the interior partitioned by these sealing means, oil for lubricating the sliding portion on the outer peripheral side of the shaft-like rotating member 211, the intermittent mechanism 203, and the like is enclosed.

  Further, seal means 17 and 17 are arranged between one side of the shaft-like rotating member 211 and the drive shaft 247 and between the joint member 249 and the shaft-like rotating member 211. In the interior partitioned by the sealing means 17, 17, meshing portions 19, 19 of the female spline portion 7 and the male spline portion 3, which are the connecting portions of the drive shaft 247 of the shaft-like rotating member 211 and the joint member 249, are provided. Is arranged, and grease is applied to the meshing portions 19 and 19 respectively.

  As described above, the casing 223 of the power transmission device 201 is filled with a plurality of types of lubricating oils having different lubricating parts. This is to reduce the lubricating oil in the casing 223 to the minimum required oil amount. In particular, supplying lubricating oil of other portions to the meshing portions 19 and 19 of the female spline portion 7 and the male spline portion 3, which are a connecting portion between the drive shaft 247 of the shaft-like rotating member 211 and the joint member 249, Since it is difficult, it is divided by the sealing means 17 and 17, and grease is applied. Hereinafter, the coupling device 1 will be described. Here, in the coupling device 1, the other end side of the shaft-shaped rotating member 211 is described as the first shaft 5 and the joint member 249 is described as the second shaft 9, but one end side of the shaft-shaped rotating member 211 is illustrated. Even when the second shaft 9 is used and the drive shaft 247 is the first shaft 5, the same configuration as that of the other end side of the shaft-like rotating member 211 can be applied. The description of the connecting device will be omitted.

  The connection device according to the embodiment of the present invention will be described with reference to FIGS.

(First embodiment)
The coupling device 1 according to the first embodiment will be described with reference to FIGS.

  The coupling device 1 of the present embodiment includes a first shaft 5 having a male spline portion 3 on the outer periphery and a second shaft 9 having a female spline portion 7 on the inner periphery, and the male spline portion 3 and the female spline. The driving force can be transmitted by connecting the unit 7. A sealing wall 11 is formed on the second shaft 9 on one side in the axial direction with respect to the female spline portion 7, and the outer peripheral portion 13 and the female on the first shaft 5 on the other side in the axial direction with respect to the male spline portion 3. Sealing means 17 is arranged between the inner peripheral portion 15 of the second shaft 9 on the other side in the axial direction with respect to the spline portion 7, and grease is applied to the meshing portion 19 between the male spline portion 3 and the female spline portion 7. ing.

  The sealing means 17 includes a fixing member 21 fixed to the outer peripheral portion 13, and a seal member 23 fixedly provided on the outer diameter side of the fixing member 21 and slidably contacting the inner peripheral portion 15. Become.

  Further, the outer peripheral portion 13 is formed with a larger diameter than the outer diameter 25 of the male spline portion 3, and the inner peripheral portion 15 is formed with a larger diameter than the inner diameter 27 of the female spline portion 7.

  The inner peripheral portion 15 is an annular protrusion 29 that extends in the axial direction from the end side of the female spline portion 7.

  Furthermore, between the first shaft 5 and the second shaft 9, a clip 31 that defines the axial position of each other is provided.

  A recess 33 is formed in the second shaft 9 between the first shaft 5 and the second shaft 9 facing each other in the axial direction.

  Further, the inner diameter 35 of the fixing member 21 is formed larger than the outer diameter 25 of the male spline portion 3, and the sealing means 17 passes from the one axial direction side of the first shaft 5 to the outer periphery of the male spline portion 3 in the axial direction. The inner peripheral portion 15 passes through the outer periphery of the male spline portion 3 in the axial direction from one axial direction side of the first shaft 5 and comes into contact with the sealing material 23.

  As shown in FIGS. 2 and 3, the first shaft 5 is formed in a shaft shape, the male spline portion 3 is formed on the outer periphery on one axial end side, and the outer peripheral portion 13 is formed on the other axial end side. Yes. The outer peripheral portion 13 is formed to have a larger diameter than the outer diameter 25 of the male spline portion 3. The male spline portion 3 meshes with the female spline portion 7 of the second shaft 9.

  The 2nd axis | shaft 9 is formed in the cylinder shape, the female spline part 7 is formed in the inner periphery of the axial direction one end side, and the inner peripheral part 15 is formed in the axial direction other end side. The inner peripheral portion 15 is an annular protrusion 29 that extends from the end side of the female spline portion 7 as one member that is continuous with the second shaft 9 in the axial direction. The annular protrusion 29 may be formed integrally with the second shaft 9 or may be formed separately and fixed to the second shaft 9. The inner peripheral portion 15 is formed to have a larger diameter than the inner diameter 27 of the female spline portion 7. The female spline part 7 meshes with the male spline part 3 to form a meshing part 19. The meshing portion 19 is provided with a clip 31, and the axial positions of the first shaft 5 and the second shaft 9 are defined. The mesh portion 19 is coated with grease that lubricates the mesh portion 19. A sealing wall 11 that prevents the grease from flowing out is provided integrally with the second shaft 9 on one side in the axial direction of the meshing portion 19. The sealing wall 11 has a concave portion 33 on the side of the meshing portion 19 that serves as a grease reservoir. Moreover, the recessed part 33 used as the grease pool is provided also in the edge part of the 1st axis | shaft 5 which opposes the sealing wall 11 in an axial direction. Further, on the other side of the meshing portion 19 in the axial direction, a sealing means 17 for preventing the grease from flowing out is disposed between the outer peripheral portion 13 and the inner peripheral portion 15.

  The sealing means 17 includes a fixing member 21 and a sealing material 23. The fixing member 21 is made of metal, resin, adhesive, or the like, and is formed in an annular shape. An inner diameter 35 of the fixing member 21 is formed larger than the outer diameter 25 of the male spline part 3 and is fixed to the outer peripheral part 13. The sealing material 23 is made of rubber, acrylic, resin, or the like, and is fixed to the outer diameter side of the fixing member 21. The sealing material 23 is slidably contacted with the inner peripheral portion 15 and partitions the meshing portion 19 together with the sealing wall 11 from the outside. The sealing means 17 is configured such that the fixing member 21 is assembled and fixed to the outer peripheral portion 13 through the outer periphery of the male spline portion 3 in the axial direction from one axial direction side of the first shaft 5, and the inner peripheral portion 15 is the first shaft. 5 is passed through the outer periphery of the male spline part 3 in the axial direction from one side in the axial direction and is brought into contact with the sealing material 23 to be assembled at a normal position.

  In such a coupling device 1, since the sealing wall 11 and the sealing means 17 are provided on both sides in the axial direction of the meshing portion 19 of the male spline portion 3 and the female spline portion 7, it is applied to the meshing portion 19. It is possible to reliably prevent the grease from flowing out from the meshing portion 19.

  Further, since the grease can be sealed in the meshing portion 19, there is no need to increase the amount of oil in the apparatus or separately provide an oil supply path to the meshing portion 19.

  Therefore, the spline connecting portion can be lubricated accurately with a simple configuration without complicating the device configuration.

  The sealing means 17 includes a fixing member 21 that is fixed to the outer peripheral portion 13, and a sealing member 23 that is fixedly provided on the outer diameter side of the fixing member 21 and that slidably contacts the inner peripheral portion 15. Therefore, by fixing the fixing member 21 to the outer peripheral portion 13 and meshing the male spline portion 3 and the female spline portion 7, the sealing means 17 can be arranged at a regular position, and the assembling property is improved. Can do.

  Further, by defining the dimensions of the spline portions 3, 7 and the outer peripheral portion 13 and the inner peripheral portion 15, damage to the sealing means 17 during assembly can be prevented.

  Further, since the inner peripheral portion 15 is an annular protrusion 29 that extends from the end side of the female spline portion 7 in the axial direction as a single member that is continuous with the second shaft 9, the inner peripheral portion 15 is simplified on the end side of the second shaft 9. By forming the annular protrusion 29 with a simple design change, a simple and compact shape capable of only a sealing function can be achieved.

  Further, since the clip 31 for defining the mutual axial position is provided between the first shaft 5 and the second shaft 9, the axial position of both shafts is regulated, and the spline meshing portion 19 and the sealing means 17. It is possible to prevent wear of the sliding portion.

  Further, since the concave portion 33 is formed in the second shaft 9 between the first shaft 5 and the second shaft 9 facing each other in the axial direction, the concave portion 33 can be used as a grease reservoir for the grease applied to the meshing portion 19. it can.

  Further, when the coupling device 1 is assembled, the sealing material 23 does not interfere with the spline portions 3 and 7, and the sealing material 23 can be prevented from being damaged. Therefore, it is possible to improve the reliability when the connecting device 1 is assembled and operated.

(Second Embodiment)
The connection device 101 according to the second embodiment will be described with reference to FIG.

  In the coupling device 101 of the present embodiment, the sealing means 103 is fixed to the outer peripheral portion 13 and fixed to the outer diameter side of the fixing member 105 and is slidable on the inner peripheral portion 15. And a sealing material 107 in contact with.

  The inner peripheral portion 15 is formed separately from the second shaft 9 and is an annular protrusion 109 that is fixed integrally with the second shaft 9 so as to extend in the axial direction from the end side of the female spline portion 7. It is. In addition, although the same code | symbol is described to the structure same as 1st Embodiment, description is abbreviate | omitted, but since it is the same structure as 1st Embodiment, a structure and functional description refer to 1st Embodiment. Although omitted, the obtained effects are the same.

  As shown in FIG. 4, the sealing means 103 includes a fixing member 105 and a sealing material 107. The fixing member 105 is made of metal or the like and is formed in an annular shape. The inner diameter of the fixing member 105 is formed larger than the outer diameter 25 (see FIG. 2) of the male spline portion 3 and is press-fitted and fixed to the outer peripheral portion 13. Further, a concave groove 111 is formed in the circumferential direction on the outer diameter side of the fixing member 105, and the sealing material 107 is integrally fitted with the fixing member 105. The sealing material 107 is formed in an annular shape such as an O-ring, and is fitted into the concave groove 111 and fixed. The sealing material 107 is slidably contacted with the inner peripheral portion 15 and partitions the meshing portion 19 together with the sealing wall 11 from the outside.

  The inner peripheral portion 15 is made of a metal or the like, and is an annular protrusion 109 formed separately from the second shaft 9. The annular protrusion 109 is press-fitted and fixed in a fixing recess 113 formed at the end of the second shaft 9, and extends in the axial direction from the end of the female spline portion 7. The inner peripheral portion 15 is formed to have a larger diameter than the inner diameter 27 (see FIG. 2) of the female spline portion 7. The sealing material 107 of the sealing means 103 is brought into contact with the inner peripheral portion 15 to prevent the grease applied to the meshing portion 19 together with the sealing wall 11 from flowing out.

  In such a coupling device 101, the sealing means 103 is fixed to the outer peripheral portion 13 and fixed to the outer diameter side of the fixing member 105, and slidably contacts the inner peripheral portion 15. Since the fixing member 105 is fixed to the outer peripheral portion 13 and the male spline portion 3 and the female spline portion 7 are engaged with each other, the sealing means 103 can be disposed at a regular position. Adhesiveness can be improved.

  In addition, the inner peripheral portion 15 is formed separately from the second shaft 9, and an annular protrusion 109 fixed integrally with the second shaft 9 so as to extend from the end side of the female spline portion 7 in the axial direction. Therefore, by forming the annular protrusion 109 alone, a simple and compact shape capable of only a sealing function can be obtained.

  In the coupling device according to the embodiment of the present invention, the sealing wall is formed separately from the second shaft and is integrally fixed to the second shaft. Thus, the recess may be formed, and the bottom of the recess may be used as the sealing wall, or the sealing wall may be formed as one member continuous with the second shaft.

  Further, the recess that becomes the grease reservoir may be provided on at least one of the first shaft and the second shaft, and may be appropriately selected according to the layout with the surrounding members.

It is sectional drawing which applied the connecting device which concerns on embodiment of this invention to the power transmission device. It is sectional drawing of the connection apparatus which concerns on 1st Embodiment of this invention. (A) It is the side view and sectional drawing of the sealing means of the coupling device which concern on 1st Embodiment of this invention. (B) It is a front view of Fig.3 (a). (A) It is sectional drawing of the connection apparatus which concerns on 2nd Embodiment of this invention. (B) It is a side view of the fixing member of Fig.4 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,101 ... Connection apparatus 3 ... Male spline part 5 ... 1st axis | shaft 7 ... Female spline part 9 ... 2nd axis | shaft 11 ... Sealing wall 13 ... Outer peripheral part 15 ... Inner peripheral part 17,103 ... Sealing means 19 ... Engagement part 21, 105: Fixing member 23, 107: Sealing material 25 ... Outer diameter of male spline part 27 ... Inner diameter of female spline part 29, 109 ... Annular projection 31 ... Clip 33 ... Recess 35: Inner diameter of fixing member

Claims (7)

A first shaft having a male spline portion on the outer periphery and a second shaft having a female spline portion on the inner periphery, and connecting the male spline portion and the female spline portion to transmit a driving force. A device,
The second shaft is formed with a sealing wall on one side in the axial direction with respect to the female spline portion, and the outer peripheral portion of the first shaft on the other side in the axial direction with respect to the male spline portion and the female spline portion. On the other hand, a sealing means is disposed between the inner peripheral portion of the second shaft on the other side in the axial direction, and grease is applied to a meshing portion between the male spline portion and the female spline portion. Connecting device. The connecting device according to claim 1,
The sealing means includes a fixing member fixed to the outer peripheral portion, and a sealing member that is fixedly provided on the outer diameter side of the fixing member and that slidably contacts the inner peripheral portion. Connecting device. The connecting device according to claim 1 or 2,
The outer peripheral portion is formed with a larger diameter than the outer diameter of the male spline portion, and the inner peripheral portion is formed with a larger diameter than the inner diameter of the female spline portion. The connecting device according to any one of claims 1 to 3,
The connecting device according to claim 1, wherein the inner peripheral portion is an annular protrusion that extends in an axial direction from an end side of the female spline portion. The connecting device according to any one of claims 1 to 4,
A coupling device is provided between the first shaft and the second shaft, wherein a clip for defining a mutual axial position is provided. A connecting device according to any one of claims 1 to 5,
A coupling device is characterized in that a recess is formed in at least one of the first shaft and the second shaft between the first shaft and the second shaft facing each other in the axial direction. The connecting device according to claim 2,
An inner diameter of the fixing member is formed to be larger than an outer diameter of the male spline portion, and the sealing means passes through the outer periphery of the male spline portion in the axial direction from one axial direction side of the first shaft and is assembled to the outer peripheral portion. The coupling device is characterized in that the inner peripheral portion passes through the outer periphery of the male spline portion in the axial direction from one axial direction side of the first shaft and abuts on the sealing material.

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