Drive transmission device for vehicle

Abstract

To provide a drive transmission device for a vehicle, which can appropriately regulate axial movement of a gear rotor with a simple configuration.SOLUTION: In a drive transmission device for a vehicle, a speed reduction mechanism 47 comprises a drive gear 48 driven by an engagement drive source 46, a rack gear 49 connected to a driven member 41, and a gear rotor 50. The gear rotor 50 is arranged on a second axial side L2 relative to the engagement drive source 46 and arranged to overlap with the engagement drive source 46 as axially viewed along an axial direction L. The speed reduction mechanism 47 comprises a regulation member 60 that regulates movement of the gear rotor 50 toward a first axial side L1. The regulation member 60 is arranged to face a first end, which is the end of the gear rotor 50 on the first axial side L1, between the gear rotor 50 and the engagement drive source 46 in the axial direction L.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vehicle drive transmission device having an engagement device. [Background technology]

[0002] Japanese Patent Laid-Open Publication No. 2013-087779 (Patent Document 1) describes an engagement device including a gear rotor (94) having a pinion (94a) that meshes with a rack gear (95a). This engagement device includes an engagement drive source (92), and the pinion (94a) is formed on one end of the gear rotor (94), and the other end is supported by a cylindrical wall (97a) provided on a cover (97) of an actuator case (98). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-087779 Summary of the Invention [Problem to be solved by the invention]

[0004] In the vehicle drive transmission device of Patent Document 1, after the gear rotor is inserted so that the rack gear and pinion mesh, a cover for the actuator case is attached, and the gear rotor is supported by a cylindrical wall of the cover so that it does not come off. However, this reduces workability because the gear rotor can move axially until the cover for the actuator case is attached. Therefore, it has been considered to improve workability by adding a function to support the gear rotor to a component constituting the engagement drive source, such as the stator of the engagement drive source, instead of the cover. However, this has the problem of easily complicating the structure of the component constituting the engagement drive source.

[0005] Therefore, it is desirable to realize a vehicle drive transmission device that can appropriately restrict the axial movement of the gear rotor with a simple configuration. [Means for solving the problem]

[0006] A vehicle drive transmission device according to the present disclosure comprises an input member drivingly connected to a wheel drive source that is a drive source for wheels, an output member drivingly connected to the wheels, and a power transmission mechanism that transmits drive force between the input member and the output member, the power transmission mechanism comprising a meshing engagement device, the engagement device comprising a driven member that is driven to switch the transmission state of drive force in the power transmission mechanism, and a drive mechanism that drives the driven member, the drive mechanism comprising an engagement drive source that is a drive source for the engagement device, and a speed reduction mechanism that reduces the drive force of the engagement drive source and transmits it to the driven member, the speed reduction mechanism comprising a drive gear driven by the engagement drive source, a rack gear connected to the driven member, and a gear rotating body, The rolling element comprises a driven gear that meshes with the drive gear, a pinion that meshes with the rack gear, and a connecting shaft that connects the driven gear and the pinion, with the direction along the rotational axis of the gear rotating body being the axial direction, one side of the axial direction being the axial first side, and the other side of the axial direction being the axial second side, the gear rotating body being arranged on the axial second side with respect to the engagement drive source and arranged so as to overlap with the engagement drive source when viewed in the axial direction, the reduction mechanism further comprises a regulating member that regulates movement of the gear rotating body toward the axial first side, and the regulating member being arranged so as to face a first end, which is the end of the gear rotating body on the axial first side, between the gear rotating body and the engagement drive source in the axial direction.

[0007] According to this configuration, the axial movement of the gear rotor can be appropriately restricted with a simple configuration. Furthermore, according to this configuration, the restricting member is disposed between the gear rotor and the engagement drive source in the axial direction so as to face the first end of the gear rotor, so that the members constituting the engagement drive source do not come into contact with the gear rotor, and wear and the like of the members constituting the engagement drive source can be avoided. [Brief explanation of the drawings]

[0008] [Figure 1]Schematic diagram of a vehicle drive device according to an embodiment [Figure 2] FIG. 2 is a perspective view of the engagement device of FIG. 1; [Figure 3] FIG. 3 is a side view of the restricting member of FIG. 2; [Figure 4] FIG. 4 is a cross-sectional view of the restricting member of FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0009] A vehicle drive transmission device 10 according to an embodiment will be described below with reference to the drawings. Fig. 1 is a diagram showing an example of the vehicle drive transmission device 10 and a vehicle 100 on which the vehicle drive transmission device 10 is mounted.

[0010] The vehicle 100 is equipped with a wheel drive source 11 that drives the wheels 18. Examples of the wheel drive source 11 include an internal combustion engine such as a gasoline engine or a diesel engine, a rotating electric machine, and the like.

[0011] Examples of vehicle 100 include a two-wheel vehicle, a four-wheel vehicle, a vehicle that uses only an internal combustion engine or a rotating electric motor as the wheel drive source 11, a hybrid electric vehicle (HEV) that uses one internal combustion engine and one rotating electric motor as the wheel drive source 11, and a vehicle that uses an in-wheel motor as the wheel drive source 11.

[0012] In this embodiment, the vehicle drive transmission device 10 is mounted on a vehicle 100, which is a hybrid electric vehicle equipped with a wheel drive source 11, a first rotating electric machine MG1, and a second rotating electric machine MG2. In this embodiment, the wheel drive source 11 is a prime mover (such as a gasoline engine or diesel engine) that is driven by the combustion of fuel to extract power.

[0013] Each of the first rotating electric machine MG1 and the second rotating electric machine MG2 has a function as a motor (electric motor) that receives a supply of electric power to generate power, and a function as a generator (electric power generator) that receives a supply of power to generate electric power.

[0014] The first rotating electrical machine MG1 includes a first stator ST1 and a first rotor RT1. The first stator ST1 is fixed to a non-rotating member. The first rotor RT1 is supported rotatably relative to the first stator ST1. In the illustrated example, the non-rotating member is a case 16, which will be described later.

[0015] The second rotating electrical machine MG2 includes a second stator ST2 and a second rotor RT2. The second stator ST2 is fixed to a non-rotating member. The second rotor RT2 is supported rotatably relative to the second stator ST2. In the illustrated example, the non-rotating member is a case 16, which will be described later.

[0016] The vehicle drive transmission device 10 includes an input member 13. The input member 13 is drivingly connected to a wheel drive source 11 that is a drive source for wheels 18. In this embodiment, the input member 13 is an input shaft formed to extend along a reference axis direction B.

[0017] In this embodiment, the input member 13 is drivingly connected to the wheel drive source 11 via a damper device 12. The damper device 12 transmits the rotation of the output shaft of the wheel drive source 11 to the input member 13 while damping torsional vibrations from the output shaft of the wheel drive source 11.

[0018] The vehicle drive transmission device 10 includes an output member 15. The output member 15 is drivingly connected to wheels 18. In the illustrated example, a differential input gear functions as the output member 15, but it may also be a drive shaft of an in-wheel motor.

[0019] Here, in this application, the term "driving connection" refers to a state in which two rotating elements are connected so as to be able to transmit a driving force, and includes a state in which the two rotating elements are connected so as to rotate integrally, or a state in which the two rotating elements are connected so as to be able to transmit a driving force via one or more transmission members. Such transmission members include various members that transmit rotation at the same speed or at a variable speed, such as shafts, gear mechanisms, belts, and chains. Note that transmission members may also include engagement devices that selectively transmit rotation and driving force, such as friction engagement devices and meshing engagement devices. However, when the term "driving connection" is used to refer to the rotating elements of a planetary gear mechanism, it refers to a state in which they are connected to each other without any other rotating elements passing through them.

[0020] In this embodiment, the input member 13 rotates around a reference axis X1. The reference axis X1 is the rotation axis of a rotating member 35, which will be described later. Hereinafter, the direction along the reference axis X1 will be referred to as the "reference axis direction B." One side of the reference axis direction B will be referred to as the "reference axis direction first side B1," and the other side of the reference axis direction B will be referred to as the "reference axis direction second side B2." Furthermore, the direction perpendicular to the reference axis X1 will be referred to as the "radial direction R."

[0021] The vehicle drive transmission device 10 includes a power transmission mechanism 20. In this embodiment, the power transmission mechanism 20 is the power transmission mechanism 20 of the vehicle 100, which is a hybrid electric vehicle, but it may also be the power transmission mechanism 20 of a vehicle 100 in which only an internal combustion engine or a rotating electric machine serves as the wheel drive source 11. The power transmission mechanism 20 is configured to transmit driving force between an input member 13 and an output member 15. The power transmission mechanism 20 is configured to transmit power between the first rotor RT1 and the output member 15.

[0022] The vehicle drive transmission device 10 includes a case 16 that houses the power transmission mechanism 20. In this embodiment, the case 16 houses an input member 13, an output member 15, and an output differential gear mechanism 38, which will be described later.

[0023] The power transmission mechanism 20 includes a first member 21 and a second member 22. The first member 21 and the second member 22 are arranged coaxially with each other. In this embodiment, the first member 21 and the second member 22 are arranged on a reference axis X1. In this embodiment, the first member 21 is formed in a cylindrical shape with its axis center on the reference axis X1.

[0024] The power transmission mechanism 20 includes a meshing engagement device 30. The engagement device 30 is a meshing engagement device that engages and disengages the first member 21 and the second member 22. Therefore, when the first member 21 and the second member 22 are engaged, the first member 21 and the second member 22 are connected to each other so as to rotate integrally. On the other hand, when the engagement between the first member 21 and the second member 22 is released, the first member 21 and the second member 22 are allowed to rotate relatively to each other.

[0025] The engagement device 30 includes a first engaged portion 31. The first engaged portion 31 is provided on the first member 21. In this embodiment, the first engaged portion 31 is a plurality of splines that extend along the reference axis direction B and are distributed in the circumferential direction around the reference axis center X1.

[0026] The engagement device 30 includes a second engaged portion 32. The second engaged portion 32 is provided on the second member 22. In this embodiment, the second engaged portion 32 is a plurality of splines that extend along the reference axis direction B and are distributed in the circumferential direction around the reference axis center X1.

[0027] The engagement device 30 includes a rotating member 35. The rotating member 35 is rotatable about a reference axis X1. The rotating member 35 is movable in a reference axis direction B relative to the first engaged portion 31 and the second engaged portion 32.

[0028] The rotating member 35 has engaging portions 35d that engage with the first engaged portion 31 and the second engaged portion 32. In this embodiment, the rotating member 35 is formed in a cylindrical shape with the reference axis X1 as its axis. The engaging portions 35d are provided on the inner circumferential surface of the rotating member 35. In this embodiment, the engaging portions 35d are a plurality of splines that extend along the reference axis direction B and are distributed in the circumferential direction around the reference axis X1.

[0029] The power transmission mechanism 20 includes a first gear G1, a second gear G2, a third gear G3, and a fourth gear G4. The first gear G1 is disposed on a reference axis X1.

[0030] In this embodiment, a first engaged portion 31 is formed on the outer peripheral surface of the first member 21. In this embodiment, the first gear G1 is disposed adjacent to the first member 21 on the first side B1 in the reference axial direction. The first gear G1 is provided with a second engaged portion 32. In this embodiment, the first gear G1 corresponds to the second member 22.

[0031] The second gear G2 is disposed on a second axis X2 that is separate from the reference axis X1 and the fourth axis X4. The second gear G2 meshes with the first gear G1.

[0032] The third gear G3 is disposed on the second axis X2. The third gear G3 is connected to the second gear G2 so as to rotate integrally with the second gear G2. The third gear G3 meshes with a differential input gear that functions as the output member 15. In this embodiment, the third gear G3 is formed to have a smaller diameter than the second gear G2. The third gear G3 is also disposed closer to the second side B2 in the reference axial direction than the second gear G2.

[0033] The fourth gear G4 is disposed on a third axis X3, which is separate from the reference axis X1, the fourth axis X4, and the second axis X2. The fourth gear G4 meshes with the second gear G2. The fourth gear G4 is drivingly connected to the second rotating electric machine MG2.

[0034] The power transmission mechanism 20 includes a distribution differential gear mechanism 37. The distribution differential gear mechanism 37 includes a first rotating element E1, a second rotating element E2, and a third rotating element E3. The order of rotational speeds of these rotating elements is first rotating element E1, second rotating element E2, and third rotating element E3. Here, the "order of rotational speeds" refers to the order of rotational speeds in the rotational state of each rotating element. The rotational speed of each rotating element changes depending on the state of the differential gear mechanism, but the order of high and low rotational speeds of each rotating element is constant because it is determined by the structure of the differential gear mechanism.

[0035] The first rotating element E1 is drivingly connected to the first rotating electric machine MG1. The second rotating element E2 is drivingly connected to the input member 13. The third rotating element E3 is drivingly connected to the output member 15 via the power transmission mechanism 20.

[0036] In this embodiment, the distribution differential gear mechanism 37 is configured as a planetary gear mechanism, and the first rotating element E1, the second rotating element E2, and the third rotating element E3 are a sun gear, a carrier, and a ring gear, respectively.

[0037] In this embodiment, the distribution differential gear mechanism 37 is configured as a single-pinion planetary gear mechanism. The second rotating element E2 as a carrier supports a pinion gear that meshes with both the first rotating element E1 as a sun gear and the third rotating element E3 as a ring gear.

[0038] In this embodiment, the first rotor RT1 and the first rotating element E1 are connected to rotate integrally. In this embodiment, the second rotor RT2 and the fourth gear G4 are connected to rotate integrally.

[0039] The power transmission mechanism 20 includes a third member 23. In this embodiment, the case 16 includes a side wall portion adjacent to the first side B1 in the reference axial direction with respect to the first member 21. In this embodiment, this side wall portion corresponds to the third member 23.

[0040] The third member 23 is provided with a third engaged portion 33. In this embodiment, the third engaged portion 33 is a plurality of splines that extend along the reference axis direction B and are distributed in the circumferential direction around the reference axis center X1. In this embodiment, the second member 22, the first member 21, and the third member 23 are arranged side by side in the reference axis direction B in the order described.

[0041] The vehicle drive transmission device 10 includes an output differential gear mechanism 38. The output differential gear mechanism 38 is configured to distribute the rotation of the output member 15 to a pair of wheels 18. The output differential gear mechanism 38 is disposed on a fourth axis X4, which is an axis different from the reference axis X1. In this embodiment, the output differential gear mechanism 38 includes a differential input gear. The differential input gear functions as the output member 15.

[0042] In this embodiment, the power transmission mechanism 20 has a pair of engagement devices 30 arranged side by side in the reference axial direction B. The pair of engagement devices 30 share a first engaged portion 31 and a rotating member 35. In the illustrated example, the second engaged portion 32, the first engaged portion 31, and the third engaged portion 33 are arranged side by side in the reference axial direction B in the order shown.

[0043] The rotating member 35 changes between a first state and a third state by moving in the reference axis direction B. The "first state" is a state in which the rotating member 35 is engaged with both the first engaged portion 31 and the second engaged portion 32. The "third state" is a state in which the engagement between the rotating member 35 and the second engaged portion 32 is released.

[0044] In this embodiment, the rotating member 35 changes between a second state and a fourth state by moving in the reference axis direction B. The "second state" is a state in which the rotating member 35 is engaged with both the first engaged portion 31 and the third engaged portion 33. The "fourth state" is a state in which the engagement between the rotating member 35 and the third engaged portion 33 is released.

[0045] Here, of the pair of engagement devices 30, the one arranged on the first side B1 in the reference axial direction is referred to as the first engagement device 30a, and the one arranged on the second side B2 in the reference axial direction is referred to as the second engagement device 30b. In this embodiment, when the first engagement device 30a is in the first state, the second engagement device 30b is in the fourth state. Also, when the second engagement device 30b is in the second state, the first engagement device 30a is in the third state. In other words, in this embodiment, when the rotating member 35 moves in the reference axial direction B, the pair of engagement devices 30 change states between the first state and the second state.

[0046] In this embodiment, when the engaging portion 35d of the rotating member 35 is engaged with both the first engaged portion 31 and the second engaged portion 32 (first state), the engaging portion 35d is disengaged from the third engaged portion 33. In this case, the third rotating element E3 and the first gear G1 of the distribution differential gear mechanism 37 are coupled to rotate integrally. As a result, the driving force of the internal combustion engine is transmitted by the distribution differential gear mechanism 37 to the first rotating electric machine MG1 and also to the output member 15 via the first gear G1, the second gear G2, and the third gear G3. In addition, the driving force of the second rotating electric machine MG2 is transmitted to the output member 15 via the fourth gear G4, the second gear G2, and the third gear G3.

[0047] In this embodiment, when the engaging portion 35d of the rotating member 35 is in a state (second state) in which it is engaged with both the first engaged portion 31 and the third engaged portion 33, the engaging portion 35d is disengaged from the second engaged portion 32. In this case, power transmission between the third rotating element E3 and the first gear G1 of the distribution differential gear mechanism 37 is interrupted, and the third rotating element E3 is fixed to the case 16. As a result, the driving force of the internal combustion engine is transmitted to the first rotating electric machine MG1 via the distribution differential gear mechanism 37 without being transmitted to the output member 15, and the first rotating electric machine MG1 generates electricity using this driving force. In addition, the driving force of the second rotating electric machine MG2 is transmitted to the output member 15 via the fourth gear G4, the second gear G2, and the third gear G3.

[0048] In this embodiment, the rotating member 35 is configured to move in the reference axis direction B while maintaining a state in which the engaging portion 35d is engaged with the first engaged portion 31. The rotating member 35 is configured to be able to enter a state in which the engaging portion 35d is disengaged from both the second engaged portion 32 and the third engaged portion 33. In other words, the first engaging device 30a can be in the third state, and the second engaging device 30b can be in the fourth state.

[0049] 2 is a perspective view showing an example of the engagement device 30. The engagement device 30 includes a driven member 41. The driven member 41 is driven to switch the transmission state of the driving force in the power transmission mechanism 20.

[0050] The driven member 41 includes the above-described rotating member 35 (see FIG. 1). The rotating member 35 is rotatable about the reference axis X1, and switches the transmission state of the driving force in the power transmission mechanism 20 by moving in the reference axis direction B. In this embodiment, the rotating member 35 is a sleeve.

[0051] The driven member 41 includes a moving member 43. The moving member 43 is engaged with the rotating member 35 in a state where relative movement therebetween in the reference axis direction B is restricted. The moving member 43 is allowed to rotate relative to the rotating member 35 around the reference axis center X1. In this embodiment, the moving member 43 is a shift fork.

[0052] The engagement device 30 includes a drive mechanism 45 that drives the driven member 41. The drive mechanism 45 drives the driven member 41 in the reference axis direction B. The drive mechanism 45 drives the moving member 43 of the driven member 41 in the reference axis direction B, thereby moving the rotating member 35 in the reference axis direction B via the moving member 43.

[0053] The drive mechanism 45 includes an engagement drive source 46 that is a drive source for the engagement device 30. Examples of the engagement drive source 46 include a rotating electric machine, an electromagnetic solenoid, a hydraulic cylinder, and a pneumatic cylinder.

[0054] The drive mechanism 45 includes a speed reduction mechanism 47. The speed reduction mechanism 47 reduces the driving force of the engagement drive source 46 and transmits the reduced driving force to the driven member 41. The speed reduction mechanism 47 includes a drive gear 48. The drive gear 48 is driven by the engagement drive source 46. In this embodiment, the rotation axis A1 of the drive gear 48 and the rotation axis of the output shaft of the engagement drive source 46 are coaxial, but they may be different axes.

[0055] The reduction mechanism 47 includes a rack gear 49. The rack gear 49 is connected to the driven member 41. In this embodiment, the rack gear 49 is a straight gear, and the drive gear 48 is a spur gear.

[0056] The reduction gear mechanism 47 includes a gear rotor 50. Here, the direction along the rotation axis A2 of the gear rotor 50 is defined as an axial direction L, one side of the axial direction is defined as a first axial side L1, and the other side of the axial direction is defined as a second axial side L2. In this embodiment, the axial direction L and the reference axial direction B are perpendicular to each other, but they do not have to be perpendicular. In this embodiment, the rotation axis A2 of the gear rotor 50 and the rotation axis A1 of the drive gear 48 are parallel to each other, but they do not have to be parallel to each other.

[0057] The gear rotor 50 includes a driven gear 51 that meshes with the drive gear 48. In this embodiment, the driven gear 51 is a spur gear. The gear rotor 50 includes a pinion 53 that meshes with the rack gear 49. In this embodiment, the pinion 53 is a spur gear.

[0058] The gear rotor 50 is disposed on the second axial side L2 relative to the engagement drive source 46. The gear rotor 50 is disposed so as to overlap with the engagement drive source 46 when viewed in the axial direction along the axial direction L. In this embodiment, at least a portion of the gear rotor 50 and at least a portion of the engagement drive source 46 overlap when viewed in the axial direction.

[0059] 3 is a diagram showing an example of a side surface of the gear rotor 50 and a side surface of a restricting member 60 that restricts movement of the gear rotor 50. In FIG. 3, the drive gear 48 that meshes with the driven gear 51 and the engagement drive source 46 are indicated by two-dot chain lines.

[0060] Here, the direction connecting the rotational axis A1 of the drive gear 48 and the rotational axis A2 of the gear rotor 50 as viewed in the axial direction along the axial direction L is defined as the meshing direction Y. The side of the drive gear 48 on which the driven gear 51 is arranged in the meshing direction Y is defined as the meshing direction first side Y1. The side of the drive gear 48 on which the driven gear 51 is arranged in the meshing direction Y is defined as the meshing direction second side Y2. The direction perpendicular to the meshing direction Y as viewed in the axial direction is defined as the meshing direction orthogonal direction V. In this embodiment, the rotational axis A1 is arranged on the upper side Z1 in the vertical direction Z than the rotational axis A2.

[0061] 4 is a diagram showing an example of a cross section of the gear rotor 50 and a cross section of the restricting member 60. The gear rotor 50 includes a connecting shaft 52 that connects a driven gear 51 and a pinion 53. In this embodiment, the connecting shaft 52 is supported by a rotor support portion 16h formed on the case 16 so as to be rotatable around the rotation axis A2.

[0062] A second end 50b, which is an end of the gear rotor 50 on the second axial side L2, is rotatably supported about the rotation axis A2 by the case 16. The second end 50b is supported by the case 16 by being inserted into a hole or recess formed in the wall surface of the case 16. In this embodiment, the gear rotor 50 and the case 16 slide against each other to be rotatably supported about the rotation axis A2, but the gear rotor 50 may also be rotatably supported about the rotation axis A2 by the case 16 via a bearing.

[0063] The gear rotor 50 is rotatably supported in a state where movement toward the second axial side L2 is restricted relative to the case 16 that houses the power transmission mechanism 20. In this embodiment, a restricting portion 16e that restricts movement of the gear rotor 50 toward the second axial side L2 is provided on the case 16. The restricting portion 16e is a wall surface that faces the side surface of the driven gear 51 on the second axial side L2.

[0064] The reduction gear mechanism 47 includes a restricting member 60 that restricts movement of the gear rotor 50 toward the first axial side L1. In the example shown in Fig. 2, the restricting member 60 is a plate-shaped member. The restricting member 60 is disposed so as to overlap with the drive gear 48 when viewed along the meshing direction Y.

[0065] In this embodiment, the regulating member 60 is arranged so as not to overlap with the rotation axis A1 of the drive gear 48 when viewed in the axial direction along the axial direction L. In the illustrated example, the regulating member 60 is arranged so as not to overlap with the drive gear 48 when viewed in the axial direction along the axial direction L.

[0066] 4, the restricting member 60 is disposed between the gear rotor 50 and the engagement drive source 46 in the axial direction L so as to face a first end 50a, which is an end on the first axial side L1 of the gear rotor 50. Depending on the shape of the gear rotor 50, examples of the first end 50a include an end face of the driven gear 51, an end face of the connecting shaft 52, and an end face of the pinion 53.

[0067] 2 and 3, the regulating member 60 is disposed so as to surround the drive gear 48 from the first side Y1 in the meshing direction. In this embodiment, the regulating member 60 is formed in an L-shape when viewed in the axial direction, but may be formed in a V-shape, an arc shape, or the like.

[0068] The restricting member 60 is disposed so as not to surround at least a portion of the second meshing direction side Y2 of the drive gear 48. The restricting member 60 has an opening 61 that opens toward the first meshing direction side Y1 of the drive gear 48. The dimension of the opening 61 in the meshing orthogonal direction V is larger than the outer diameter of the drive gear 48.

[0069] The restricting member 60 has a fixed portion 63. The fixed portion 63 is fixed to a non-rotating member. Examples of the fixed portion 63 include a fastening portion, a welded portion, an adhesive portion, and a fitting portion. Examples of the non-rotating member include the case 16, the case of a rotating electrical machine, a stator, etc.

[0070] The regulating member 60 has a plurality of fixing portions 63. In this embodiment, the regulating member 60 has a pair of fixing portions 63 arranged separately on both sides of the drive gear 48 in the meshing orthogonal direction V when viewed in the axial direction L. The pair of fixing portions 63 are fixed to a case 16 that houses the power transmission mechanism 20. In this embodiment, the fixing portions 63 are fixed to a protrusion 16g provided on a wall surface 16f of the case 16.

[0071] In this embodiment, at least a portion of the fixed portion 63 overlaps with at least a portion of the drive gear 48 when viewed in the meshing orthogonal direction V. In the illustrated example, at least a portion of the fixed portion 63 overlaps with the rotation axis A1 of the drive gear 48 when viewed in the meshing orthogonal direction.

[0072] 4, the restricting member 60 includes a support portion 65 disposed at a position overlapping with the rotation axis A2 of the gear rotor 50 as viewed in the axial direction L. The support portion 65 is disposed so as to come into contact with the first end portion 50a when the gear rotor 50 moves to the first axial side L1. In the illustrated example, the support portion 65 is disposed so as to face the first end portion 50a of the gear rotor 50.

[0073] In this embodiment, the support portion 65 is formed in a plate shape along a direction perpendicular to the rotation axis A2 of the gear rotor 50. The support portion 65 is disposed at a position overlapping with at least a portion of the gear rotor 50 when viewed in the axial direction L.

[0074] The support portion 65 is disposed closer to the first axial side L1 than the surface of the second axial side L2 of the fixed portion 63. In this embodiment, the support portion 65 is disposed closer to the first axial side L1 than the surface of the first axial side L1 of the fixed portion 63. The support portion 65 is disposed closer to the first axial side L1 than the surface of the gear rotor 50 on the first axial side L1.

[0075] The restricting member 60 has a convex portion 68 that protrudes toward the second axial side L2. The convex portion 68 is disposed at a position overlapping with the rotation axis A2 of the gear rotor 50 when viewed in the axial direction along the axial direction L. In this embodiment, the most protruding position of the convex portion 68 and the rotation axis A2 of the gear rotor 50 are disposed coaxially. In this embodiment, the support portion 65 has the convex portion 68.

[0076] The restricting member 60 is formed in a plate shape along a direction perpendicular to the rotation axis A1 of the drive gear 48. In this embodiment, a concave portion is formed on the surface of the plate-shaped support portion 65 on the first axial side L1, and a convex portion 68 is formed on the surface of the support portion 65 on the second axial side L2.

[0077] In this embodiment, the gear rotor 50 is positioned so that the first end 50a, which is the end on the first axial side L1, is lower Z2 in the vertical direction Z than the second end 50b, which is the end on the second axial side L2.

[0078] According to the above-described vehicle drive transmission device 10, the case 16 and the restricting member 60 can be separate bodies. This increases the degree of freedom in arranging the gear rotor 50 relative to the case 16. Furthermore, for example, after the pinion 53 of the gear rotor 50 is meshed with the rack gear 49, the restricting member 60 can restrict movement of the gear rotor 50 toward the first axial side L1 before closing a lid or the like of the case 16, thereby increasing the degree of freedom in the assembly process of the vehicle drive transmission device 10.

[0079] According to the vehicle drive transmission device 10 described above, the case 16 and the restricting member 60 can be made of different materials. In this way, for example, by forming the restricting member 60 from a material that is more wear-resistant than the case 16, it is easier to suppress the generation of wear powder due to the rotation of the gear rotating body 50.

[0080] According to the above-described vehicle drive transmission device 10, for example, the case of the engagement drive source 46 and the regulating member 60 can be made of different materials. In this way, by forming the regulating member 60 from a material that is more abrasion resistant than the case of the engagement drive source 46, it is easier to suppress the generation of wear powder due to the rotation of the gear rotating body 50.

[0081] Other Embodiments Next, other embodiments of the vehicle drive transmission device 10 will be described.

[0082] (1) In the above embodiment, the input member 13 and the first rotor RT1 rotate around the reference axis X1 of the rotating member 35. However, the present invention is not limited to such an example. For example, the rotation axis of the input member 13 and the reference axis X1 of the rotating member 35 may be different. Furthermore, for example, the rotation axis of the first rotor RT1 and the reference axis X1 of the rotating member 35 may be different.

[0083] (2) In the above embodiment, the regulating member 60 is disposed to surround the drive gear 48 from the first side Y1 in the meshing direction, and is formed in a plate shape along a direction perpendicular to the rotational axis A1 of the drive gear 48. However, the present invention is not limited to such an example. For example, the regulating member 60 may have a shape that does not surround the drive gear 48 from the first side Y1 in the meshing direction. Furthermore, for example, the drive gear 48 may mesh with another gear, and the regulating member 60 may overlap the drive gear 48 as viewed in the axial direction L.

[0084] (3) In the above embodiment, the restricting member 60 is a plate-shaped member. However, the present invention is not limited to such an example. For example, the restricting member 60 may be a columnar member. Furthermore, for example, at least the support portion 65 may be plate-shaped. Furthermore, for example, at least the fixing portion 63 may be plate-shaped.

[0085] (4) In the above embodiment, the restricting member 60 has a convex portion 68 that protrudes toward the second axial side L2. However, the present invention is not limited to such an example. For example, the restricting member 60 may have a concave portion that is recessed toward the first axial side L1, and the concave portion may restrict movement of the gear rotor 50 in the axial direction L.

[0086] (5) In the above embodiment, the drive gear 48, the driven gear 51, and the pinion 53 are spur gears. However, the present invention is not limited to such an example. For example, the driven gear 51 and the pinion 53 may be helical gears. Furthermore, for example, the drive gear 48 may be a helical gear.

[0087] (6) In the above embodiment, the gear rotor 50 is supported by the case 16 and is rotatably supported while movement toward the second axial side L2 is restricted. However, the present invention is not limited to such an example. For example, the gear rotor 50 may be pressed against the restricting member 60 by its own weight or the like without being restricted from moving toward the second axial side L2 relative to the case 16.

[0088] (7) In the above embodiment, a configuration has been described as an example in which a portion of the gear rotor 50 and a portion of the engagement drive source 46 overlap in the axial direction. However, the present invention is not limited to such an example, and may be configured, for example, in which the entire gear rotor 50 and a portion of the engagement drive source 46 overlap in the axial direction. Furthermore, for example, the gear rotor 50 and the engagement drive source 46 do not have to overlap in the axial direction.

[0089] (8) In the above embodiment, the gear rotor 50 is disposed so that the first end 50a is located below the second end 50b on the Z2 side. However, the present invention is not limited to such an example. For example, the gear rotor 50 may be disposed so that the first end 50a is located above the second end 50b on the Z1 side. Furthermore, for example, the first end 50a and the second end 50b may be disposed at the same height.

[0090] (9) The configurations disclosed in the above-described embodiments may be combined with configurations disclosed in other embodiments as long as no contradictions arise. Regarding other configurations, the embodiments disclosed in this specification are merely examples in all respects. Therefore, various modifications may be made as appropriate within the scope of the present disclosure.

[0091] Summary of the above embodiment Hereinafter, a vehicle drive transmission device according to the present disclosure will be described.

[0092] In one aspect, a vehicle drive transmission device (10) includes an input member (13) drivingly connected to a wheel drive source (11) that is a drive source for wheels (18), an output member (15) drivingly connected to the wheels (18), and a power transmission mechanism (20) that transmits drive force between the input member (13) and the output member (15), and the power transmission mechanism (20) includes a meshing engagement device (30), and the engagement device (30) switches the transmission state of the drive force in the power transmission mechanism (20). The drive mechanism (45) includes an engagement drive source (46) that is a drive source for the engagement device (30), and a speed reduction mechanism (47) that reduces the driving force of the engagement drive source (46) and transmits it to the driven member (41). The speed reduction mechanism (47) includes a drive gear (48) driven by the engagement drive source (46), a rack gear (49) connected to the driven member (41), and a gear rotor (5). The gear rotor (50) includes a driven gear (51) that meshes with the drive gear (48), a pinion (53) that meshes with the rack gear (49), and a connecting shaft (52) that connects the driven gear (51) and the pinion (53). The direction along the rotation axis of the gear rotor (50) is defined as an axial direction (L), one side in the axial direction is defined as an axial first side (L1), and the other side in the axial direction is defined as an axial second side (L2). The gear rotor (50) is axially rotated relative to the engagement drive source (46). The reduction gear mechanism (47) is arranged on the second axial side (L2) and is arranged so as to overlap with the engagement drive source (46) when viewed in the axial direction along the axial direction L, and the reduction gear mechanism (47) further includes a regulating member (60) that regulates movement of the gear rotating body (50) toward the first axial side (L1), and the regulating member (60) is arranged so as to face a first end (50a), which is the end of the gear rotating body (50) on the first axial side (L1), between the gear rotating body (50) and the engagement drive source (46) in the axial direction.

[0093] According to this simple configuration, the movement of the gear rotor (50) in the axial direction (L) can be appropriately restricted. Furthermore, according to this configuration, the restricting member (60) is disposed between the gear rotor (50) and the engagement drive source (46) in the axial direction (L) so as to face the first end (50a) of the gear rotor (50). Therefore, the components of the engagement drive source (46) do not come into contact with the gear rotor (50), and wear, etc., of the components of the engagement drive source (46) can be prevented.

[0094] In one aspect, the direction connecting the rotation axis (A1) of the drive gear (48) and the rotation axis (A2) of the gear rotor (50) when viewed in the axial direction is defined as the meshing direction (Y), the side of the drive gear (48) on which the driven gear (51) is arranged in the meshing direction (Y) is defined as the meshing direction first side (Y1), and the direction perpendicular to the meshing direction (Y) when viewed in the axial direction is defined as the meshing orthogonal direction (V).The regulating member (60) comprises a pair of fixed portions (63) arranged separately on both sides of the meshing orthogonal direction (V) with respect to the drive gear (48) when viewed in the axial direction, and a support portion (65) arranged at a position overlapping with the rotation axis of the gear rotor (50) when viewed in the axial direction, and is arranged to surround the drive gear (48) from the meshing direction first side (Y1) and is formed in a plate shape along the direction perpendicular to the rotation axis (A1) of the drive gear (48).

[0095] According to this configuration, even when the space between the gear rotating body (50) and the engagement drive source (46) in the axial direction (L) is narrow, the regulating member (60) can be arranged, and the regulating member (60) can appropriately regulate the movement of the gear rotating body (50) in the axial direction (L).

[0096] In one embodiment, the regulating member (60) is arranged at a position overlapping the rotation axis (A2) of the gear rotating body (50) when viewed in the axial direction, and has a convex portion (68) that protrudes toward the second axial side (L2).

[0097] According to this configuration, even when the regulating member (60) and the gear rotating body (50) come into contact with each other, the sliding speed of the two can be easily kept low, thereby minimizing wear on the regulating member (60) and the gear rotating body (50).

[0098] In one embodiment, the driven gear (51) and the pinion (53) are spur gears, and the gear rotor (50) is rotatably supported in a case (16) that houses the power transmission mechanism (20) with its movement toward the second axial side (L2) restricted.

[0099] According to this configuration, since the driven gear (51) and the pinion (53) are spur gears, the axial load acting on the gear rotor (50) due to the meshing of the gears can be reduced. Therefore, the contact pressure between the restricting member (60) and the gear rotor (50) can be reduced, and wear on the restricting member (60) and the gear rotor (50) can be reduced. Furthermore, according to this configuration, since the gear rotor (50) is supported with respect to the case (16) in a state where movement toward the second axial side (L2) is restricted, movement of the gear rotor (50) in the axial direction (L) can be appropriately restricted by the case (16) and the restricting member (60).

[0100] It is sufficient for the vehicle drive transmission device according to the present disclosure to achieve at least one of the above-described effects. [Explanation of symbols]

[0101] 10: Vehicle drive transmission device, 11: Wheel drive source, 13: Input member, 15: Output member, 16: Case, 18: Wheel, 20: Power transmission mechanism, 30: Engagement device, 41: Driven member, 45: Drive mechanism, 46: Engagement drive source, 47: Reduction mechanism, 48: Drive gear, 49: Rack gear, 50: Gear rotor, 50a: First end, 51: Driven gear, 52: Connecting shaft, 53: Pinion, 60: Regulating member, 63: Fixed portion, 65: Support portion, 68: Convex portion, 100: Vehicle

Claims

1. an input member drivingly connected to a wheel drive source that is a drive source for the wheels; an output member drivingly connected to the wheels; a power transmission mechanism that transmits a driving force between the input member and the output member; Equipped with the power transmission mechanism includes a meshing engagement device; the engagement device includes a driven member that is driven to switch a transmission state of the driving force in the power transmission mechanism, and a drive mechanism that drives the driven member, the drive mechanism includes an engagement drive source that is a drive source for the engagement device, and a speed reduction mechanism that reduces the speed of the drive force of the engagement drive source and transmits the reduced speed to the driven member, the reduction mechanism includes a drive gear driven by the engagement drive source, a rack gear connected to the driven member, and a gear rotor; the gear rotor includes a driven gear that meshes with the drive gear, a pinion that meshes with the rack gear, and a connecting shaft that connects the driven gear and the pinion, A direction along the rotation axis of the gear rotor is defined as an axial direction, one side in the axial direction is defined as an axial first side, and the other side in the axial direction is defined as an axial second side, the gear rotor is disposed on the second axial side with respect to the engagement drive source and is disposed so as to overlap with the engagement drive source as viewed in the axial direction, the reduction mechanism further includes a restricting member that restricts movement of the gear rotor toward the first side in the axial direction, The regulating member is arranged between the gear rotating body and the engagement drive source in the axial direction so as to face a first end portion, which is an end portion on the first axial side of the gear rotating body.

2. A direction connecting the rotation axis of the drive gear and the rotation axis of the gear rotor as viewed in the axial direction is defined as a meshing direction, a side on which the driven gear is disposed relative to the drive gear in the meshing direction is defined as a meshing direction first side, and a direction perpendicular to the meshing direction as viewed in the axial direction is defined as a meshing perpendicular direction, The regulating member is a pair of fixed portions disposed separately on both sides of the drive gear in the direction perpendicular to the meshing direction as viewed in the axial direction, and a support portion disposed at a position overlapping with a rotation axis of the gear rotating body as viewed in the axial direction, 2. The vehicle drive transmission device according to claim 1, wherein the first plate is disposed to surround the drive gear from the first side in the meshing direction and is formed in a plate shape along a direction perpendicular to the rotational axis of the drive gear.

3. 3. The vehicle drive transmission device according to claim 1, wherein the restricting member is positioned so as to overlap with the rotational axis of the gear rotating body when viewed in the axial direction, and has a convex portion that protrudes toward the second axial side.

4. the driven gear and the pinion are spur gears, 3. The vehicle drive transmission device according to claim 1, wherein the gear rotor is rotatably supported with respect to a case that houses the power transmission mechanism, with movement of the gear rotor toward the second axial side restricted.

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