JP2018118598A - Fitting method for unit having disconnection mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting method for a unit having a disconnection mechanism, by which an operation of fitting the unit having the disconnection mechanism to a body is made simpler than a conventional operation.SOLUTION: Using an adjustment shim S1, the position of an actuator module A2 in the direction of a first rotation axis C1 is adjusted with respect to a shift module A1. Thereby, the respective positions of the outer- peripheral disconnection tooth 62a of a disconnection sleeve 62 and the inner-periphery disconnection tooth 52b of a ring gear 52 when a unit A having a disconnection mechanism is fitted to a body B can be adjusted to the optimum positions. Accordingly, without disassembling the shift module A1 and the actuator module A2, the positions of the outer-periphery disconnection tooth 62a of the disconnection sleeve 62 and the inner-periphery disconnection tooth 52b of the ring gear 52 can be adjusted to the optimum positions.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a method for assembling a unit with a connection / disconnection mechanism, for example, a unit with a connection / disconnection mechanism including a cylindrical member, a connection / disconnection sleeve, an actuator, a moving mechanism, etc. The present invention relates to a technique that simplifies the work of assembling the unit with the connection / disconnection mechanism to the main body as compared with the prior art.

  A cylindrical member; a connecting / disconnecting sleeve arranged on the cylindrical member so as to be movable in a rotational axis direction but not relatively rotatable; and a first connecting / disconnecting tooth formed on an outer periphery; an actuator; A unit with a connection / disconnection mechanism provided with a moving mechanism for moving between the engagement position and the non-engagement position is formed on the inner periphery of the cylindrical portion so as to be able to engage with the first connection / disconnection tooth of the connection / disconnection sleeve. For a main body including a ring gear having two disconnection teeth and a case that supports the ring gear so as to be rotatable around the rotation axis and is open at one end in the direction of the rotation axis, is inserted into the opening of the case, A method of assembling a unit with a connection / disconnection mechanism for attaching the unit with a connection / disconnection mechanism to the main body is known. For example, the assembly method of the unit with the connection / disconnection mechanism described in Patent Document 1 is that.

  In the method of assembling the unit with the connection / disconnection mechanism as described in Patent Document 1, when the unit with the connection / disconnection mechanism is assembled to the main body, the connection / disconnection sleeve is moved to the meshing position by the moving mechanism. Sometimes the first connecting / disconnecting tooth of the connecting / disconnecting sleeve is engaged with the second connecting / disconnecting tooth of the ring gear, and the connecting / disconnecting sleeve is moved to the non-engaging position by the moving mechanism. In order to prevent the first connection / disconnection tooth from meshing with the second connection / disconnection tooth of the ring gear, for example, a position adjustment shim having an optimum thickness dimension is selected from a plurality of types of position adjustment shims having different thickness dimensions, Adjusting the position of the first connecting / disconnecting tooth of the connecting / disconnecting sleeve and the second connecting / disconnecting tooth of the ring gear when the unit with contact mechanism is assembled to the main body. To have. The position adjustment shim is assembled between the connection sleeve and the moving mechanism, that is, the synchronization device provided in the movement mechanism, as shown in the unit with the connection mechanism in FIG. ing.

Japanese Unexamined Patent Publication No. 2016-155502

  By the way, in the unit with a connection / disconnection mechanism as in Patent Document 1, the position adjusting shim is integrally assembled between the connection / disconnection sleeve and the moving mechanism, and the unit with the connection / disconnection mechanism is connected to the main body. When the position of the first connecting / disconnecting tooth of the connecting / disconnecting sleeve and the second connecting / disconnecting tooth of the ring gear is adjusted to the optimum position when assembled to the unit, the unit with the connecting / disconnecting mechanism is disassembled. Therefore, it is necessary to change to the position adjusting shim having the optimum thickness dimension. For this reason, in order to adjust the position of the first connecting / disconnecting tooth of the connecting / disconnecting sleeve and the second connecting / disconnecting tooth of the ring gear to the optimum position when the unit with the connecting / disconnecting mechanism is assembled to the main body. Since it is necessary to disassemble the unit with the connection / disconnection mechanism and reassemble the position adjusting shim, the cylindrical member, the connection / disconnection sleeve, the actuator, the moving mechanism, etc., the unit with the connection / disconnection mechanism is There is a problem that the work of assembling the main body becomes complicated.

  The present invention has been made against the background of the above circumstances, and its purpose is to assemble a unit with a connection / disconnection mechanism that simplifies the work of assembling the unit with the connection / disconnection mechanism to the main body as compared with the conventional case. It is to provide an attachment method.

  The gist of the first invention is: (a) a cylindrical member, and a connecting / disconnecting sleeve which is disposed on the cylindrical member so as to be movable in the rotational axis direction and is not relatively rotatable, and has a first connecting / disconnecting tooth formed on the outer periphery. A connection / disconnection mechanism-equipped unit comprising: an actuator; and a moving mechanism for moving the connection / disconnection sleeve between the engagement position and the non-engagement position by the actuator. A ring gear having a second connection / disconnection tooth formed so as to be able to mesh with the first connection / disconnection tooth; and a case that supports the ring gear so as to be rotatable around the rotation axis and has an opening at one end in the rotation axis direction. A method of assembling a unit with a connection / disconnection mechanism that is inserted into an opening of the case with respect to a main body, and the unit with the connection / disconnection mechanism is assembled to the main body, and (b) the cylindrical member and the connection / disconnection sleeve A shift module in which the moving mechanism is integrally assembled, and an actuator module in which the actuator and a cover member that supports the actuator and directly or indirectly abuts against the opening side end surface of the case are integrally assembled. (C) when assembling the actuator module integrally with the shift module, and when assembling the actuator module with the shift module, the movement When the connection / disconnection sleeve is moved to the engagement position by a mechanism, the first connection / disconnection tooth of the connection / disconnection sleeve meshes with the second connection / disconnection tooth of the ring gear. When it is moved to the non-meshing position, A contact surface that directly or indirectly abuts against an opening-side end surface of the case of the cover member and the connection sleeve so that the first connection / disconnection tooth of the sleeve does not mesh with the second connection / disconnection tooth of the ring gear. A position adjusting shim for adjusting the dimension in the rotational axis direction between the first connecting and disconnecting teeth of the actuator module to be constant, and (d) using the position adjusting shim, the actuator module relative to the shift module. The position adjustment in the rotation axis direction is performed.

  According to the first invention, (b) the shift module in which the cylindrical member, the connecting / disconnecting sleeve, and the moving mechanism are integrally assembled, the actuator and the actuator are supported, and the opening side end surface of the case is provided. When assembling the unit with the connection / disconnection mechanism, which includes an actuator module integrally assembled with a cover member that directly or indirectly abuts, to the main body, (c) integrating the actuator module with the shift module When assembling the actuator module to the shift module, when the connection sleeve is moved to the meshing position by the moving mechanism, the first connection / disconnection tooth of the connection / disconnection sleeve is moved to the ring gear. It meshes with the second connecting / disconnecting teeth, but is connected / disconnected by the moving mechanism. When the leave is moved to the non-engagement position, the cover member has an opening-side end surface of the case so that the first connection / disconnection tooth of the connection / disconnection sleeve does not mesh with the second connection / disconnection tooth of the ring gear. A position adjusting shim for adjusting the dimension in the rotational axis direction between the contact surface directly or indirectly contacting and the first connecting / disconnecting tooth of the connecting / disconnecting sleeve is selected, (d) The position adjustment shim is used to adjust the position of the actuator module in the rotational axis direction with respect to the shift module. For this reason, the position adjustment shim is used to adjust the position of the actuator module in the rotational axis direction with respect to the shift module, so that the connection / disconnection sleeve of the connection / disconnection mechanism when the unit with the connection / disconnection mechanism is assembled to the main body. Since the position of the first connecting / disconnecting tooth and the second connecting / disconnecting tooth of the ring gear can be adjusted to an optimum position, the disassembly of the shift module and the actuator module can be performed without disassembling the connecting / disconnecting sleeve. The positions of the first connecting / disconnecting teeth and the second connecting / disconnecting teeth of the ring gear can be adjusted to an optimum position. Accordingly, the unit with the connection / disconnection mechanism is disassembled in order to adjust the position of the first connection / disconnection tooth of the connection / disconnection sleeve and the second connection / disconnection tooth of the ring gear to an optimum position, and the cylinder is again formed. Compared with the conventional method of assembling the unit with the connection / disconnection mechanism for assembling the member, the connection / disconnection sleeve, the actuator, and the moving mechanism, the operation of assembling the unit with the connection / disconnection mechanism to the main body can be simplified. it can.

1 is a skeleton diagram schematically illustrating a configuration of a four-wheel drive vehicle to which the present invention is preferably applied. It is sectional drawing explaining the structure of the transfer provided in the four-wheel drive vehicle of FIG. FIG. 3 is a schematic diagram for explaining the operating principle of a moving mechanism provided in the transfer of FIG. 2. It is a figure explaining the assembly | attachment to the main body of the transfer of the unit with a connection / disconnection mechanism. FIG. 5 is a diagram illustrating assembly of an actuator module to a shift module in the unit with a connection / disconnection mechanism in FIG. 4. It is the enlarged view to which the peripheral part of the position adjustment shim in the state where the actuator module was assembled | attached to the shift module was expanded. It is a figure which shows the state by which the actuator module was assembled | attached to the shift module.

  Preferably, (a) a bearing that rotatably supports the cylindrical member around the rotation axis is press-fitted into an end of the cylindrical member on the actuator module side, and (b) the cover member includes the A bearing support portion for supporting the bearing is formed, and (c) the position adjusting shim is an annular member disposed between the bearing and the bearing support portion of the cover member. For this reason, it is possible to suitably adjust the position of the actuator module in the rotational axis direction with respect to the shift module by changing the thicknesses of the annular plate members having different thicknesses.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the drawings are appropriately simplified or modified, and the dimensional ratios, shapes, and the like of the respective parts are not necessarily drawn accurately.

  FIG. 1 is a skeleton diagram schematically illustrating a configuration of a four-wheel drive vehicle 10 to which the present invention is preferably applied. In FIG. 1, a four-wheel drive vehicle 10 corresponds to a first power transmission path for transmitting power of an engine 12 to left and right front wheels 14L and 14R corresponding to main drive wheels, and power of the engine 12 to sub drive wheels. An FF-based four-wheel drive device having a second power transmission path for transmitting to the left and right rear wheels 16L, 16R is provided. In the two-wheel drive state of the four-wheel drive vehicle 10, the driving force transmitted from the engine 12 via the automatic transmission 18 is transmitted to the left and right front wheels 14L via the front wheel driving force distribution device 20 and the left and right axles 22L and 22R. , 14R. In this two-wheel drive state, at least the first clutch (connection / disconnection mechanism) 24 provided in the transfer 26 is released, and the propeller shaft 28, the rear wheel driving force distribution device 30, and the rear wheels 16L and 16R are driven. Power is not transmitted. However, in the four-wheel drive state, in addition to the two-wheel drive state, the first clutch 24 and the second clutch 32 are both engaged, and the propeller shaft 28, the rear wheel driving force distribution device 30 and the rear wheel are engaged. The driving force from the engine 12 is transmitted to 16L and 16R.

  As shown in FIG. 1, the front wheel driving force distribution device 20 is provided so as to be rotatable about the first rotation axis C1, and is engaged with the output gear 18a of the automatic transmission 18 and a differential case fixed to the ring gear 20r. 20c and a differential gear mechanism 20d accommodated in the differential case 20c, and the drive transmitted to the ring gear 20r while allowing differential rotation of the left and right axles 22L, 22R connected to the front wheels 14L, 14R. The force is transmitted to the left and right axles 22L and 22R. The differential case 20 c has inner peripheral mesh teeth 20 a that are fitted to first outer peripheral spline teeth 34 a formed at the end of the cylindrical input shaft (cylindrical member) 34 provided on the transfer 26 on the differential case 20 c side. Is formed. As a result, part of the driving force transmitted from the engine 12 to the left and right front wheels 14L, 14R via the differential case 20c is input to the transfer 26 via the input shaft 34.

  As shown in FIG. 1, the rear-wheel driving force distribution device 30 that distributes the driving force to the left and right rear wheels 16L and 16R includes a coupling 36 at the end of the propeller shaft 28 on the rear wheels 16L and 16R side. A power transmission path is selected between the first rotating member 40 formed with the ring gear 40a that meshes with the drive pinion 38 connected in this manner, and the axles 42L, 42R connected to the first rotating member 40 and the rear wheels 16L, 16R. And a differential gear device 42 that transmits a driving force from the engine 12 input via the second clutch 32 to the left and right axles 42L and 42R while appropriately applying a differential rotation. Is provided.

  As shown in FIG. 1, the differential gear device 42 is connected to a differential case 42c rotatably supported around the second rotation axis C2 and axles 42L and 42R, respectively, and is in a state facing each other in the differential case 42c. A pair of side gears 42a supported by the differential case 42c so as to be rotatable about the two rotation axes C2, and a pair of pinions 42b supported by the differential case 42c and disposed between the pair of side gears 42a in a state of meshing with the pair of side gears 42a. ing.

  As shown in FIG. 1, clutch teeth 40 b constituting a part of the second clutch 32 are formed at the end of the first rotating member 40 on the differential gear device 42 side. In addition, clutch teeth 42 d constituting a part of the second clutch 32 are formed at the end portion of the differential gear device 42 on the first rotating member 40 side of the differential case 42 c.

  As shown in FIG. 1, the second clutch 32 is a meshing clutch for connecting and disconnecting a power transmission path between the first rotating member 40 and the differential case 42 c of the differential gear device 42. The second clutch 32 includes clutch teeth 40b formed on the first rotating member 40, clutch teeth 42d formed on the differential case 42c, and inner peripheral teeth 44a that can mesh with the clutch teeth 40b and the clutch teeth 42d. A dog dog clutch that is formed and includes a sleeve 44 that is movable in the direction of the second rotation axis C2 and a second actuator 46 that drives the sleeve 44 in the direction of the second rotation axis C2. The second actuator 46 drives the sleeve 44 in the direction of the rotation axis C2 by a command signal output from an electronic control device (not shown). The second clutch 32 may synchronize the rotation of the first rotating member 40 and the rotation of the differential case 42c prior to meshing the inner peripheral teeth 44a of the sleeve 44 with the clutch teeth 40b of the first rotating member 40. A known synchronizer 48 is provided. In the second clutch 32, in the two-wheel drive state in which the first clutch 24 is released, the sleeve 44 is moved to the rear wheel 16R side by the second actuator 46 as shown in FIG. When the space between the rotating member 40 and the differential case 42c is released, the propeller shaft 28 is disconnected from the left and right rear wheels 16L, 16R, and the running resistance of the vehicle due to the rotational resistance of the propeller shaft 28 and the like is reduced.

  As shown in FIGS. 1 and 2, the transfer 26 is a cylindrical ring gear that meshes with a driven pinion 50 connected to an end of the propeller shaft 28 on the front wheel 14 side for driving the propeller shaft 28 for power transmission. 52, a cylindrical input shaft 34 to which a part of driving force transmitted from the engine 12 to the front wheels 14L and 14R via the differential case 20c is input, and a differential transmission case in the power transmission path from the differential case 20c to the propeller shaft 28. And a first clutch 24 for connecting and disconnecting a power transmission path between the input shaft 34 connected to the differential case 20c and the ring gear 52 connected to the propeller shaft 28. The clutch 24 is engaged and the power transmission path between the input shaft 34 and the ring gear 52 is connected. When, a part of the driving force transmitted from the engine 12 left and right front wheels 14L, 14R and is, wheels 16L after the left and right through the propeller shaft 28, and is output to 16R.

  As shown in FIG. 2, the transfer 26 includes a unit case 54 that houses a cylindrical ring gear 52, a cylindrical input shaft 34, the first clutch 24, and the like. The unit case 54 includes a case member 54a that covers most of the components of the transfer 26 such as the ring gear 52, the input shaft 34, and the first clutch 24, and the front wheel 14R in the direction of the first rotation axis C1 of the case member 54a. A cover member 54c for closing the opening 54b formed at one end of the side is integrally provided, and the case member 54a and the cover member 54c are integrally fastened by a fastening member such as a bolt (not shown). .

  As shown in FIG. 2, the ring gear 52 is a bevel gear formed with, for example, inclined teeth or a hypoid gear. Further, the ring gear 52 includes a substantially cylindrical cylindrical portion 52a formed on the inner periphery of the ring gear 52, and an inner peripheral connecting / disconnecting tooth (second second) formed on the inner periphery of the end portion on the front wheel 14L side of the cylindrical portion 52a. The connecting / disconnecting teeth 52b are integrally formed. The cylindrical portion 52a is formed with a shaft portion 52d that protrudes from the side surface 52c of the ring gear 52 toward the front wheel 14R in a substantially cylindrical shape, and the shaft portion 52d is supported by the case member 54a of the unit case 54 via the bearing 56. Has been. That is, the ring gear 52 is supported in a cantilever manner via the bearing 56 so as to be rotatable around the first rotation axis C1 by the case member 54a.

  As shown in FIG. 2, the input shaft 34 passes through the inside of the cylindrical portion 52 a of the ring gear 52, and a part of the input shaft 34 is disposed inside the cylindrical portion 52 a of the ring gear 52. Further, the input shaft 34 is rotatable about the first rotation axis C <b> 1 by supporting both ends of the input shaft 34 to the unit case 54 via the first bearing 58 and the second bearing 60. That is, it is rotatably supported concentrically with the ring gear 52.

  The first clutch 24 is a connection / disconnection mechanism for connecting / disconnecting a power transmission path between the input shaft 34 and the ring gear 52 in the transfer 26. Further, as shown in FIG. 2, the first clutch 24 is disposed on the input shaft 34 so as to be movable in the direction of the first rotation axis C <b> 1 with respect to the input shaft 34 and not rotatable relative to the input shaft 34. A connection / disconnection sleeve 62 having outer peripheral connection / disconnection teeth (first connection / disconnection teeth) 62a formed on the outer periphery, and a coil-shaped first return spring 64 that urges the connection / disconnection sleeve 62 from the non-engagement position toward the engagement position. The moving mechanism 66 for moving the connecting / disconnecting sleeve 62 in the direction of the first rotation axis C1 to move the connecting / disconnecting sleeve 62 between the meshing position and the non-meshing position, and the first actuator for driving the moving mechanism 66 (Actuator) 68 is provided. The meshing position is a position where the connection / disconnection sleeve 62 is moved in the direction of the first rotation axis C1 by the moving mechanism 66 and the outer peripheral connection / disconnection tooth 62a of the connection / disconnection sleeve 62 is engaged with the inner peripheral connection / disconnection tooth 52b of the ring gear 52. In the meshing position, the ring gear 52 and the input shaft 34 cannot be rotated relative to each other. The non-engagement position is a position where the connection / disconnection sleeve 62 is moved in the direction of the first rotation axis C <b> 1 by the moving mechanism 66 and the outer peripheral connection / disconnection tooth 62 a of the connection / disconnection sleeve 62 is not engaged with the inner peripheral connection / disconnection tooth 52 b of the ring gear 52. In the non-meshing position, the ring gear 52 and the input shaft 34 can be rotated relative to each other. The first return spring 64 is interposed between the first bearing 58 and the connection sleeve 62 in a preloaded state. The connection sleeve 62 is moved by the first return spring 64 in the first rotation axis C1 direction. The front wheel 14R is biased.

  As shown in FIG. 2, the moving mechanism 66 is provided so as to be capable of relative rotation around the first rotation axis C <b> 1 with respect to the input shaft 34, and the connection / disconnection sleeve 62 against the urging force of the first return spring 64. A pair of annular first cams 72 and second cams 74, and a pair of first cams that are relatively rotated about the first rotation axis C1 by the operation of the first actuator 68. 72 and the second cam 74 have spherical rolling elements 76 sandwiched between groove-like cam surfaces 72b and 74b respectively formed on opposing surfaces 72a and 74a facing each other. When the two cams 74 are relatively rotated about the first rotation axis C 1, the ball cam 78 is moved toward the piston 70 and the first cam 72 is directed toward the second cam 74. And a latching tooth 82a (see FIG. 3). The relative rotation around the first rotation axis C1 is impossible with respect to the input shaft 34 and the movement in the direction of the first rotation axis C1. And a holder 82 for retaining the piston 70 with a retaining tooth 82a. The moving mechanism 66 includes a synchronization device 84 that synchronizes the rotation of the input shaft 34, that is, the connection sleeve 62 and the rotation of the ring gear 52 when the connection sleeve 62 moves from the non-engagement position to the engagement position. The connecting sleeve 62 and the piston 70 are disposed.

  As shown in FIG. 2, the cover member 54 c has an annular coil having an L-shaped cross section that is supported so as to be rotatable about the first rotation axis C <b> 1 with respect to the electromagnetic coil as the first actuator 68 and the cover member 54 c. The member 86 is integrally assembled. The annular member 86 is provided with an annular movable piece 88 disposed on the outer peripheral side of the annular member 86 so as to be adjacent to the electromagnetic coil that is the first actuator 68. The movable piece 88 is provided on the annular member 86 so as not to rotate relative to the annular member 86 and to move in the first rotation axis C1 direction with respect to the annular member 86. The second cam 74 is disposed on the outer periphery of the second cam 74 so that the second cam 74 cannot rotate relative to the annular member 86 and can move in the first rotational axis C1 direction with respect to the annular member 86. Inner peripheral spline teeth 86a that mesh with the formed outer peripheral spline teeth 74c are formed. Although not shown, the inner peripheral surface of the first cam 72 has inner peripheral teeth that mesh with the outer peripheral spline teeth formed on the input shaft 34 so as not to be relatively rotatable and movable in the direction of the first rotational axis C1. Is formed.

  In the electromagnetic coil, the ball cam 78, the annular member 86, and the movable piece 88 that are the first actuator 68 configured as described above, for example, the input shaft 34 is rotating around the first rotation axis C1 while the vehicle is traveling. In this case, when the first actuator 68 is operated and the movable piece 88 is attracted to the electromagnetic coil by the electromagnetic coil, the movable member 88 is attracted to the electromagnetic coil which is a non-rotating member. Through this, the rotational braking torque is transmitted to the second cam 74. For this reason, the first cam 72 and the second cam 74 are rotated relative to each other by the rotational braking torque, and the first cam 72 is moved through the spherical rolling element 76 in the direction of the first rotation axis C1. While moving toward the piston 70 against the urging force of the second return spring 80, the connection sleeve 62 is moved toward the front wheel 14L via the piston 70 and the like. When the first actuator 68 is deactivated from the actuated state, the connecting / disconnecting sleeve 62 is moved to the front wheel 14R side by the urging force of the first return spring 64 and the urging force of the second return spring 80 causes the first to move. The cam 72 moves in a direction approaching the second cam 74.

  FIG. 3 is a schematic diagram for explaining the operating principle of the moving mechanism 66, and shows a state where the annular piston 70, the pressing portion 72c of the annular first cam 72, and the annular holder 82 are developed. As shown in FIG. 3, the annular piston 70 is formed with a protrusion 70 a protruding from the holder 82 side. In addition, the annular holder 82 is periodically formed with a sawtooth engaging tooth 82 a that is continuous in the circumferential direction for engaging the protrusion 70 a of the piston 70, and the holder 82 is fixed to the input shaft 34. It is arranged. Further, the pressing portion 72c of the annular first cam 72 has a sawtooth shape similar to that of the latching tooth 82a of the holder 82, but continues in the circumferential direction with a predetermined phase shift in the circumferential direction, and the protrusion 70a of the piston 70 is connected to the pressing portion 72c. Receiving receiving teeth 72d are formed periodically. The pressing portion 72c of the annular first cam 72 is provided so as not to rotate relative to the holder 82 and to be movable in the direction of the first rotation axis C1 and resists the urging force of the first return spring 64 and the second return spring 80. Then, the piston 70 is moved by one stroke of the ball cam 78. Note that stoppers 72e and 82b for stopping the sliding of the protrusion 70a of the piston 70 are provided on the inclined surfaces of the receiving teeth 72d of the pressing portion 72c of the first cam 72 and the engaging teeth 82a of the holder 82, respectively.

  FIGS. 3A and 3E show the connection / disconnection sleeve 62 in the engagement position. As shown in FIGS. 3A and 3E, the first cam 72 is in a state where the projection 70 a projecting from the piston 70 is located at a position latched by the latching tooth 82 a of the holder 82. The pressing portion 72c is positioned at the base position. FIG. 3B shows that the piston 70 resists the urging force of the first return spring 64 and the second return spring 80 for the moving stroke ST by driving the ball cam 78 by energizing the electromagnetic coil that is the first actuator 68. And the state moved from the base position is shown. In this process, the piston 70 is moved by the pressing portion 72c of the first cam 72 and separated from the holder 82, and the piston 70 slides down the inclined surface 72f of the pressing portion 72c of the first cam 72. In addition, the dashed-dotted line shown by (b) of FIG. 3 shows the base position of the press part 72c of the 1st cam 72 of (a) of FIG. 3 (a), in order to demonstrate movement stroke ST. FIG. 3C shows that the pressing portion 72c of the first cam 72 is moved by the moving stroke ST according to the urging force of the second return spring 80 by the non-drive of the ball cam 78 by the non-energization of the electromagnetic coil as the first actuator 68. It shows a state where it is only returned and positioned at the base position. In this process, the piston 70 is latched by the latching teeth 82a of the holder 82 and held in the non-meshing position. FIG. 3D shows that the pressing portion 72c of the first cam 72 again causes the first return spring 64 and the second return by the moving stroke ST by driving the ball cam 78 by energizing the electromagnetic coil that is the first actuator 68. A state in which the spring 80 is moved from its base position against the urging force of the spring 80 is shown. In this process, the piston 70 is further moved toward the first return spring 64, and the ring gear 52 and the connection / disconnection sleeve 62, that is, the input shaft 34 are rotationally synchronized by the synchronization device 84. Next, as shown in FIG. 3 (e), the pressing force 72 c of the first cam 72 causes the biasing force of the second return spring 80 by the non-drive of the ball cam 78 due to the non-energization of the electromagnetic coil that is the first actuator 68. Accordingly, when the stroke is returned by the moving stroke ST and is positioned at the base position, the connection sleeve 62 is positioned at the meshing position.

  Thereby, in the moving mechanism 66, the piston 70 is sent in the circumferential direction by the reciprocating movement of the first cam 72 by the ball cam 78, and the connection / disconnection sleeve 62 is moved toward the non-engagement position and the engagement position. That is, when the piston 70 is reciprocated once by the first cam 72, the connection sleeve 62 is positioned at the non-engagement position. When the piston 70 is reciprocated twice by the first cam 72, that is, when the connection sleeve 62 is in the non-engagement position, the piston 70 is reciprocated once by the first cam 72. The engagement sleeve 62 is positioned at the meshing position by the urging force of the first return spring 64 after being disengaged from the latching teeth 82a.

  In the transfer 26, as shown in FIG. 4, for example, the input shaft 34, the connection / disconnection sleeve 62, the first actuator 68, the moving mechanism 66, the cover member 54c, the first return spring 64, and the first bearing. A unit A with a connection / disconnection mechanism in which 58, the second bearing 60, and the like are integrally assembled is attached to a main body B including, for example, a ring gear 52, a bearing 56, a case member 54a, and the like. . Hereinafter, a method for assembling the unit with the connection / disconnection mechanism for attaching the unit A with the connection / disconnection mechanism to the main body B will be described in detail.

  As shown in FIG. 5, the unit A with the connection / disconnection mechanism includes, for example, the input shaft 34, the connection / disconnection sleeve 62, the moving mechanism 66, the first bearing 58, the second bearing 60, the first return spring 64, and the like. A cylindrical shift module A1 assembled, and an annular actuator module A2 in which, for example, a first actuator 68, a cover member 54c, an annular member 86, a movable piece 88 and the like are integrally assembled, are provided. The inner peripheral spline teeth 86a formed on the annular member 86 integrally assembled with the actuator module A2 are fitted to the outer peripheral spline teeth 74c formed on the second cam 74 integrally assembled with A1, that is, the spline fitting. When combined, the actuator module A2 is assembled integrally with the shift module A1. It is.

  When the unit A with the connection / disconnection mechanism is assembled to the main body B, the position A of the actuator module A2 in the first rotation axis C1 direction is adjusted with respect to the shift module A1 to the unit A with the connection / disconnection mechanism. A position adjusting shim S1 for adjusting the positions of the inner peripheral connecting / disconnecting teeth 52b of the ring gear 52 and the outer peripheral connecting / disconnecting teeth 62a of the connecting / disconnecting sleeve 62 is provided. As shown in FIGS. 4 and 6, a second bearing 60 that presses the input shaft 34 around the first rotation axis C1 is press-fitted into the end of the input shaft 34 on the actuator module A2 side. The cover member 54c is formed with a bearing support portion 54d for supporting the second bearing 60, and the position adjustment shim S1 is an annular member fixed to the bearing support portion 54d of the second bearing 60 and the cover member 54c. 90 is an annular member disposed in between.

  As shown in FIGS. 4 to 6, in the position adjustment shim S1, a plurality of types of the annular plate materials having different thicknesses t1 in the first rotation axis C1 direction, for example, every 0.1 mm are prepared as management parts. The annular members 90 having different thicknesses t1 in the direction of the axis C1 are annular members 90 fixed to the bearing support portion 54d of the second bearing 60 and the cover member 54c, which are press-fitted into the end of the input shaft 34 on the actuator module A2 side. Is disposed between the actuator module A2 and the actuator module A2 in the first rotational axis C1 direction relative to the shift module A1. In other words, by changing the thickness t1 of the annular plate material that is the position adjustment shim S1, as shown in FIG. 7, the abutment surface 54e of the case member 54a of the cover member 54c is contacted indirectly via the bearing 56. By setting the dimension D in the direction of the first rotation axis C1 between the contact surface 54f and the outer peripheral connection / disconnection tooth 62a of the connection / disconnection sleeve 62 to the predetermined dimension D1, the unit A with the connection / disconnection mechanism is connected to the main body B. When the connecting / disconnecting sleeve 62 is moved to the meshing position by the moving mechanism 66, the outer peripheral connecting / disconnecting teeth 62a of the connecting / disconnecting sleeve 62 mesh with the inner peripheral connecting / disconnecting teeth 52b of the ring gear 52. When the connecting / disconnecting sleeve 62 is moved to the non-engaging position by 66, the outer peripheral connecting / disconnecting teeth 62a of the connecting / disconnecting sleeve 62 engage with the inner peripheral connecting / disconnecting teeth 52b of the ring gear 52. Become fit so as not to.

  In the transfer 26 configured as described above, first, when the actuator module A2 is assembled to the shift module A1, the position adjustment shim S1 is selected, and the selected position adjustment shim S1 is used as shown in FIG. The actuator module A2 is assembled to the shift module A1. Next, as shown in FIG. 7, between the contact surface 54f of the cover member 54c and the outer peripheral connection / disconnection tooth 62a of the connection sleeve 62 of the unit A with the connection / disconnection mechanism in which the actuator module A2 is assembled to the shift module A1. A dimension D in the direction of the first rotation axis C1 is measured.

  If the measured dimension D is not the predetermined dimension D1, as shown in FIG. 5, the actuator module A2 is removed from the shift module A1, the position adjustment shim S1 is changed, the actuator module A2 is reassembled to the shift module A1, and the cover is again covered. The dimension D in the first rotation axis C1 direction between the contact surface 54f of the member 54c and the outer peripheral connection / disconnection tooth 62a of the connection / disconnection sleeve 62 is measured. Further, when the measured dimension D is the predetermined dimension D1, the unit A with the connecting / disconnecting mechanism in which the actuator module A2 is integrally assembled with the shift module A1, as shown in FIG. Then, it is inserted into the opening 54b of the case member 54a. As a result, the unit A with the connection / disconnection mechanism is assembled to the main body B.

  As described above, according to the assembling method of the unit A with the connection / disconnection mechanism of the present embodiment, the shift module A1 in which the input shaft 34, the connection / disconnection sleeve 62, and the moving mechanism 66 are integrally assembled, the first A unit A with a connection / disconnection mechanism, comprising: an actuator module A2 that is integrally assembled with an actuator 68 and a cover member 54c that supports the first actuator 68 and indirectly contacts the opening-side end surface 54e of the case member 54a. When assembling to the main body B, the actuator module A2 is integrally assembled to the shift module A1, and when the actuator module A2 is assembled to the shift module A1, the connection sleeve 62 is moved to the engagement position by the moving mechanism 66. The outer peripheral connecting / disconnecting teeth 62a of the connecting / disconnecting sleeve 62 The outer connecting / disconnecting teeth 62a of the connecting / disconnecting sleeve 62 are engaged with the inner connecting / disconnecting teeth 52b of the ring gear 52 when the connecting / disconnecting sleeve 62 is moved to the non-engaging position by the moving mechanism 66. The dimension D in the first rotational axis C1 direction between the contact surface 54f that indirectly contacts the opening side end surface 54e of the case member 54a of the cover member 54c and the outer peripheral connection / disconnection tooth 62a of the connection / disconnection sleeve 62 The position adjustment shim S1 for adjusting the position is selected, and the position adjustment shim S1 is used to adjust the position of the actuator module A2 in the direction of the first rotation axis C1 with respect to the shift module A1. For this reason, the connection sleeve when the unit A with the connection mechanism is assembled to the main body B by adjusting the position of the actuator module A2 in the first rotation axis C1 direction with respect to the shift module A1 using the position adjustment shim S1. Since the positions of the outer peripheral connecting / disconnecting teeth 62a of the ring 62 and the inner peripheral connecting / disconnecting teeth 52b of the ring gear 52 can be adjusted to the optimum positions, the connecting / disconnecting sleeve 62 can be connected without disassembling the shift module A1 and the actuator module A2. The positions of the outer peripheral connecting / disconnecting teeth 62a and the inner peripheral connecting / disconnecting teeth 52b of the ring gear 52 can be adjusted to the optimum positions. As a result, in order to adjust the position of the outer peripheral connection / disconnection tooth 62a of the connection / disconnection sleeve 62 and the inner peripheral connection / disconnection tooth 52b of the ring gear 52 to the optimum position, the unit with the connection / disconnection mechanism is disassembled and the input shaft is disconnected again. Compared to the conventional method of assembling the unit with the connection / disconnection mechanism in which the contact sleeve, the actuator, and the moving mechanism are assembled, the operation of assembling the unit A with the connection / disconnection mechanism into the main body B can be simplified.

  Further, according to the method for assembling the unit A with the connection / disconnection mechanism of the present embodiment, the input shaft 34 is rotatably supported around the first rotation axis C1 at the end of the input shaft 34 on the actuator module A2 side. The second bearing 60 is press-fitted, and a bearing support portion 54d that supports the second bearing 60 is formed in the cover member 54c. The position adjustment shim S1 is a bearing support portion 54d between the second bearing 60 and the cover member 54c. It is the annular member arrange | positioned between. For this reason, the position adjustment of the actuator module A2 in the first rotation axis C1 direction with respect to the shift module A1 can be suitably performed by changing the thickness t1 of the annular plate member having a different thickness t1.

  As mentioned above, although the Example of this invention was described in detail based on drawing, this invention is applied also in another aspect.

  For example, in the embodiment described above, the holder 82 is formed with one stage of the latching teeth 82a, but for example, two or more stages of latching teeth, that is, a plurality of stages of latching teeth may be formed.

  In the above-described embodiment, the unit A with the connection / disconnection mechanism for assembling the unit A with the connection / disconnection mechanism to the main body B is, for example, the input shaft 34 provided on the front wheels 14L, 14R side of the four-wheel drive vehicle 10. And a connecting / disconnecting mechanism unit A including a connecting / disconnecting sleeve 62, a first actuator 68, a moving mechanism 66, and the like are provided on the front wheels 14L, 14R side of the four-wheel drive vehicle 10, for example, a ring gear 52 and a case member 54a. For example, a connecting / disconnecting mechanism provided with, for example, a cylindrical member, a connecting / disconnecting sleeve, an actuator, a moving mechanism, and the like provided on the rear wheel side of a four-wheel drive vehicle. The attached unit may be applied to a unit attached to a main body including, for example, a ring gear and a case provided on the rear wheel side of the four-wheel drive vehicle.

  In the above-described embodiment, the contact surface 54f of the cover member 54c is indirectly contacted with the case opening side end surface 54e of the case member 54a via the bearing 56. The surface 54f may be in direct contact with the case opening side end surface 54e of the case member 54a.

  The above description is only an embodiment, and the present invention can be implemented in variously modified and improved forms based on the knowledge of those skilled in the art.

34: Input shaft (cylindrical member)
52: Ring gear 52a: Cylindrical portion 52b: Inner peripheral connection / disconnection tooth (second connection / disconnection tooth)
54a: Case member (case)
54b: Opening 54c: Cover member 54e: Opening end face 54f: Contact surface 62: Connection / disconnection sleeve 62a: Outer peripheral connection / disconnection tooth (first connection / disconnection tooth)
66: Movement mechanism 68: First actuator (actuator)
A: Unit with connection / disconnection mechanism A1: Shift module A2: Actuator module B: Main body C1: First rotation axis (rotation axis)
D: Dimension S1: Position adjustment shim

Claims (1)

A cylindrical member; a connecting / disconnecting sleeve arranged on the cylindrical member so as to be movable in a rotational axis direction but not relatively rotatable; and a first connecting / disconnecting tooth formed on an outer periphery; an actuator; A unit with a connection / disconnection mechanism provided with a moving mechanism for moving between the engagement position and the non-engagement position is formed on the inner periphery of the cylindrical portion so as to be able to engage with the first connection / disconnection tooth of the connection / disconnection sleeve. For a main body including a ring gear having two disconnection teeth and a case that supports the ring gear so as to be rotatable around the rotation axis and is open at one end in the direction of the rotation axis, is inserted into the opening of the case, A method of assembling the unit with a connection / disconnection mechanism for attaching the unit with the connection / disconnection mechanism to the main body,
A shift module in which the cylindrical member, the connecting / disconnecting sleeve, and the moving mechanism are integrally assembled; and a cover member that supports the actuator and the actuator and directly or indirectly abuts against an opening-side end surface of the case. When assembling the unit with the connection / disconnection mechanism comprising the actuator module integrally assembled to the main body,
When assembling the actuator module integrally with the shift module and assembling the actuator module with the shift module, when the connection sleeve is moved to the engagement position by the moving mechanism, the connection sleeve The first connection / disconnection tooth meshes with the second connection / disconnection tooth of the ring gear. When the connection / disconnection sleeve is moved to the non-engagement position by the moving mechanism, the first connection / disconnection tooth of the connection / disconnection sleeve is The contact surface of the cover member that directly or indirectly contacts the opening-side end surface of the case and the first connection / disconnection tooth of the connection / disconnection sleeve so as not to mesh with the second connection / disconnection tooth of the ring gear. Select a position adjustment shim for adjusting the dimension in the direction of the rotation axis in between,
A method for assembling a unit with a connection / disconnection mechanism, wherein the position adjustment shim is used to adjust the position of the actuator module in the rotational axis direction relative to the shift module.

Images