Transmission

Abstract

To provide a transmission mechanism capable of reliably lubricating a parking gear and a parking pole even in low-speed travel.SOLUTION: A transmission mechanism 10 includes a power shaft 30, a power gear 32 supported by the power shaft 30, a relay shaft 40 for transmitting power from the power shaft 30, a relay gear 42 supported by the relay shaft 40, a drive shaft 26 to which power from the relay shaft 40 is transmitted, a parking gear 44 supported by the relay shaft 40, a support shaft 63 arranged adjacent to the parking gear 44, and a parking pole 61 oscillative around the support shaft 63 and having a claw 62 engageable with the parking gear 44. The relay gear 42 and the parking gear 44 are arranged adjacent to each other in the axial direction of the relay shaft 40. A engagement part 45 between the claw 62 and the parking gear 44 is arranged on the lower side of the power gear 32 in an axial view from the relay shaft 40.SELECTED DRAWING: Figure 1

Description

【Technical Field】 【0001】 The present invention relates to a transmission mechanism such as a transmission or a transaxle mounted on a vehicle such as an electric vehicle, a hybrid vehicle, or an engine vehicle. 【Background Art】 【0002】 Conventionally, various transmissions have a parking mechanism (parking lock mechanism) for maintaining a parked state (for example, Patent Document 1). The parking mechanism described in Patent Document 1 mentioned above includes a parking gear attached to a secondary shaft (output shaft) in a continuously variable transmission, and a parking pole having a claw that can mesh with the parking gear. Further, the parking pole is biased by a pole spring in a direction in which the engagement with the parking gear is released. Therefore, the parking pole is configured such that the claw and the parking gear do not mesh until the rotation of the parking gear reaches a predetermined speed. 【0003】 By the way, in the above-described parking mechanism, for example, there was a case where a driver accidentally operated the vehicle into the parking range (P range) during driving. In such a case, the parking pole would continue to be bounced against the parking gear at high speed, and there was a concern that the parking pole or the parking gear would wear or be damaged. Therefore, in the prior art described in Patent Document 1 mentioned above, a lubrication structure that discharges oil scraped up by a rotating body toward the meshing portion between the parking gear and the parking pole is disclosed. 【Prior Art Documents】 【Patent Documents】 【0004】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2023-83156 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 However, the lubrication structure described in Patent Document 1 has a problem in that, for example, when the vehicle is started (when driving begins), the rotation speed of the rotating body is low (low-speed driving state), resulting in insufficient oil stirring by the rotating body. Therefore, the lubrication structure described in Patent Document 1 has a problem in that oil lubrication at the meshing part of the parking gear and parking pawl is insufficient. In this state of insufficient oil lubrication, if the driver mistakenly performs a parking operation (misshift), wear at the meshing part of the parking gear and parking pawl is accelerated. In particular, when the vehicle is driving in reverse, the vehicle is in a low-speed driving state, so lubrication at the meshing part of the parking gear and parking pawl tends to be insufficient, and wear at the meshing part becomes significant. 【0006】 Therefore, the present invention aims to provide a transmission mechanism that can reliably lubricate the parking gear and parking pawl even when driving at low speeds. [Means for solving the problem] 【0007】 (1) The transmission mechanism of the present invention, provided to solve the above-mentioned problems, comprises a power shaft, a power gear supported on the power shaft, a relay shaft that transmits power from the power shaft, a relay gear supported on the relay shaft, a drive shaft to which the power is transmitted via the relay shaft, a parking gear supported on the relay shaft, a support shaft disposed adjacent to the parking gear, and a parking pawl that is supported so as to be able to swing toward and away from the parking gear about the support shaft and has a claw that can engage with the parking gear as it swings, wherein the relay gear and the parking gear are arranged adjacent to each other in the axial direction of the relay shaft, and the engaging portion of the claw and the parking gear is located below the power gear in an axial view of the relay shaft. 【0008】 The transmission mechanism of the present invention, when configured as described in (1) above, allows the power gear to be positioned above the meshing portion of the parking pawl and parking gear. Here, oil that has been used for lubrication during vehicle operation is held between the power gear and the intermediate gear. Therefore, in the transmission of the present invention, when the vehicle is started (during low-speed driving at the start of driving), the oil held in the power gear is supplied onto the parking pawl, and oil is also supplied (dripped) to the meshing portion of the pawl and parking gear via the parking pawl. As a result, the transmission mechanism of the present invention can suppress wear and damage to the meshing portion of the parking gear and parking pawl, especially during low-speed driving of the vehicle. Here, the transmission mechanism of the present invention can be preferably applied to a transmission or a transaxle equipped with a differential gear. 【0009】 (2) The transmission mechanism of the present invention described above is characterized in that the parking pawl is arranged to extend in the vertical direction, and the support shaft is located adjacent to the power gear. 【0010】 By configuring the transmission mechanism of the present invention as described in (2) above, the engagement portion between the parking pawl and the parking gear can be positioned below the power gear. This allows the transmission mechanism of the present invention to supply (drip) oil flowing along the parking pawl to the engagement portion between the pawl and the parking gear. Therefore, the transmission mechanism of the present invention can suppress wear and damage to the engagement portion between the parking gear and the parking pawl, especially when the vehicle is traveling at low speeds. 【0011】 (3) The transmission mechanism of the present invention described above is preferably characterized in that the outermost diameter portion of the power gear is arranged to overlap with at least a part of the parking pole in the vertical direction when viewed in the axial direction of the relay shaft. 【0012】 The transmission mechanism of the present invention, configured as described in (3) above, allows oil held in the meshing portion of the power gear and intermediate gear to be supplied (dripped) onto the parking pawl as the power gear and intermediate gear rotate. As a result, the transmission mechanism of the present invention can supply oil flowing along the parking pawl to the pawl's claws and the meshing portion of the parking gear, ensuring reliable lubrication of the meshing portion of the parking pawl and parking gear even when the vehicle is traveling at low speeds. Therefore, the transmission mechanism of the present invention can suppress wear and damage to the meshing portion of the parking gear and parking pawl, especially when the vehicle is traveling at low speeds. 【0013】 (4) The transmission mechanism of the present invention described above is preferably characterized in that the power shaft is the output shaft of the drive motor. 【0014】 By configuring the transmission mechanism of the present invention as described in (4) above, it is possible to properly lubricate the parking gear and parking pawl in hybrid vehicles, electric vehicles, and the like. 【0015】 (5) The transmission mechanism of the present invention described above is characterized in that the shafts are arranged in the vertical direction in the order of the power shaft, the relay shaft, and the drive shaft. 【0016】 By configuring the transmission mechanism of the present invention as described in (5) above, the parking gear can be positioned on the intermediate shaft below the power shaft, so that the oil held between the power gear and the intermediate gear is supplied (dripped) from above the parking pawl. As a result, the transmission mechanism of the present invention can supply oil to the meshing portion between the parking pawl (claw) and the parking gear via the parking pawl, so that the meshing portion of the parking pawl and parking gear can be reliably lubricated even when the vehicle is traveling at low speeds. Therefore, the transmission mechanism of the present invention can suppress wear and damage to the meshing portion of the parking gear and parking pawl, especially when the vehicle is traveling at low speeds. 【0017】 (6) The transmission mechanism of the present invention described above is preferably characterized in that the axis of the power shaft is offset toward the parking pole side with respect to the axis of the relay shaft and the drive shaft. 【0018】 The transmission mechanism of the present invention, when configured as described in (6) above, ensures that the power gear is reliably positioned on the parking pawl, so that the oil accumulated (held) in the power gear is reliably supplied (dripped) onto the parking pawl when the power gear starts to rotate. As a result, the transmission mechanism of the present invention can supply oil to the meshing portion between the parking pawl (claw) and the parking gear via the parking pawl, so that the meshing portion of the parking pawl and parking gear can be reliably lubricated even when the vehicle is traveling at a low speed. Therefore, the transmission mechanism of the present invention can suppress wear and damage to the meshing portion of the parking gear and parking pawl. Here, it is preferable that the parking pawl and the support shaft of the parking pawl are positioned on the downstream side in the direction of rotation when the power shaft rotates in the reverse direction of the vehicle. As a result, the transmission mechanism of the present invention can reliably supply oil onto the parking pawl when the vehicle is traveling in reverse (at a low speed). [Effects of the Invention] 【0019】 According to the present invention, it is possible to provide a transmission mechanism that can reliably lubricate the parking gear and parking pawl even when driving at low speeds. [Brief explanation of the drawing] 【0020】 [Figure 1] This is a partially cutaway front view of a transmission mechanism according to one embodiment of the present invention, as seen from the front of the vehicle. [Figure 2] Figure 1 is a side view of the transmission mechanism. [Modes for carrying out the invention] 【0021】 Hereinafter, the transmission mechanism 10 according to an embodiment of the present invention will be described in detail while referring to the drawings. Note that each figure is schematically shown for easy understanding, and it should be noted that the actual shape, size, and arrangement of components may be different. In addition, in the present embodiment, a case where the transmission mechanism 10 is a transaxle 10 integrally provided with a differential mechanism 20 will be described as an example. Further, in FIG. 2, the power shaft 30 rotates in the clockwise direction is defined as the forward rotation direction (forward direction), and the direction of rotation in the counterclockwise direction is defined as the reverse rotation direction (reverse direction) for explanation. 【0022】 As shown in FIG. 1, the transaxle 10 is provided in the vehicle V. In addition, the vehicle V includes an engine, a battery, etc. (not shown). 【0023】 The vehicle V in the present embodiment is, for example, a so-called series hybrid vehicle. Specifically, the vehicle V uses an engine as a power source to drive a first electric motor 14 described later, and drives a second electric motor 16 described later by driving the first electric motor 14 to travel. In addition, the vehicle V can stop the engine and use the battery as a power source to drive the second electric motor 16 to travel (EV travel). 【0024】 In the following description, the vertical direction in the state where the transaxle 10 is mounted on the vehicle V will be simply described as the "vertical direction H" or the "height direction H". In the height direction H, the upper side will be simply described as "upper side Up" and the lower side will be simply described as "lower side Lw". 【0025】 Furthermore, in the following description, in the state where the transaxle 10 is mounted on the vehicle V, the width direction of the vehicle V will be simply described as the "width direction W". 【0026】 As shown in Figure 1, the transaxle 10 comprises a transaxle housing 50, a first motor 14 (motor), a second motor 16 (motor), and a differential mechanism 20. The transaxle 10 also includes a power shaft 30, a relay shaft 40, a drive shaft 26, a parking mechanism 60 (see Figure 2), etc. 【0027】 The power shaft 30 is connected to the second electric motor 16 and rotates when power is transmitted from the second electric motor 16. In other words, in this embodiment, the power shaft 30 is configured as the output shaft of the second electric motor 16 (drive motor). The power shaft 30 is provided with a power gear 32 and a bearing 34. Therefore, as the power shaft 30 rotates, the power gear 32 rotates integrally with the power shaft 30. The power shaft 30 is positioned so that its axis is aligned with the width direction W of the vehicle V and is rotatably supported by the bearing 34. 【0028】 The power gear 32 has a predetermined outer diameter and meshes with the intermediate gear 42, which will be described later. Therefore, the power gear 32 can transmit power to the intermediate gear 42. As will be described in detail later, the power gear 32 is positioned on the upper side of the parking pole 61 (see Figure 2). 【0029】 The relay shaft 40 is rotatably supported in the transaxle housing 50 via bearings 34. As shown in Figure 2, the relay shaft 40 is located on the lower Lw side of the power shaft 30. As shown in Figure 1, the relay shaft 40 is provided with a relay gear 42 and a parking gear 44. 【0030】 The intermediate gear 42 and the parking gear 44 are arranged adjacent to each other in the axial direction of the intermediate shaft 40. The intermediate gear 42 meshes with the power gear 32 and the differential gear 22, which will be described later. Therefore, when the power shaft 30 rotates, the intermediate shaft 40 rotates in the opposite direction to the power shaft 30 via the power gear 32 and the intermediate gear 42. In addition, the drive shaft 26, which will be described later, rotates via the intermediate gear 42 and the differential gear 22 as the intermediate shaft 40 rotates. The intermediate gear 42 can change the rotational speed of the drive shaft 26 at an appropriate gear ratio. In this embodiment, the rotational speed of the drive shaft 26 is changed to a lower speed by the intermediate gear 42. Therefore, the rotational speed of the parking gear 44 can also be reduced. As a result, in this embodiment, wear due to contact between the parking gear 44 and the claws 62 of the parking pawl 61, which will be described later, is reduced. 【0031】 The first motor 14 (MG1) consists of a motor generator. A generator controller (not shown) with a built-in inverter is connected to the first motor 14. Although not shown in the diagram, the generator controller is mounted, for example, on top of the transaxle 10. The AC power output from the first motor 14 is converted to DC power by the generator controller, and this DC power is supplied to the battery, thereby charging the battery. The first motor 14 is driven by rotational power transmitted from the engine (not shown). 【0032】 The second motor 16 (MG2) consists of a motor generator. A motor controller (not shown) with a built-in inverter is connected to the second motor 16. Although not shown in the diagram, the motor controller is mounted, for example, on top of the transaxle 10. A battery for driving is connected to the motor controller. DC power output from the battery is supplied to the motor controller, and this DC power is converted to AC power by the motor controller. The AC power is supplied to the second motor 16, driving the second motor 16. 【0033】 As shown in Figure 1, the differential mechanism 20 is configured to allow differential motion between a pair of left and right drive shafts 26, 26 (also referred to as drive shafts 26, 26) that drive the left and right drive wheels, and to transmit rotational power to this pair of left and right drive shafts 26, 26. In the following description, unless otherwise specified, the pair of drive shafts 26, 26 may simply be referred to as drive shaft 26. In this embodiment, the drive shaft 26 is located below the power shaft 30 and the relay shaft 40, on the Lw side. That is, the shafts are arranged vertically in the order of power shaft 30, relay shaft 40, and drive shaft 26. 【0034】 The differential mechanism 20 is composed of multiple gears, including a differential ring gear 22 and a differential gear 24. The differential ring gear 22 is provided on one of the drive shafts 26 (in this embodiment, the second electric motor 16 side). 【0035】 The power transmitted from the second electric motor 16 to the power shaft 30 is transmitted to the differential ring gear 22 of the differential mechanism 20 via the power gear 32 and the intermediate gear 42, causing the drive shaft 26 to rotate in the opposite direction to the intermediate shaft 40. As the drive shaft 26 rotates, power is transmitted from the differential mechanism 20 (drive shaft 26) to the drive wheels 2,2. As a result, the drive wheels 2,2 rotate and the vehicle V moves. In addition, the vehicle V's drive wheels 2,2 are locked when the parking gear 44, described later, is locked by the parking mechanism 60. 【0036】 The transaxle housing 50 (case) is a housing for the first motor 14, the second motor 16, the transmission mechanism 10, etc. 【0037】 The transaxle housing 50 has a partition wall 53, which separates the space that will become the motor room 51 from the space that will become the gear room 52. 【0038】 The motor room 51 houses the first motor 14 and the second motor 16. The gear room 52 houses the power gear 32, intermediate gear 42, parking gear 44, components of the parking mechanism 60 (parking pawl 61, rod 65, etc.), differential mechanism 20, etc. 【0039】 Furthermore, oil is contained inside the transaxle housing 50, and the oil is pumped by an oil pump (not shown) to cool the first motor 14 and the second motor 16. 【0040】 Figure 2 is a side view showing the gear chamber 52 of the transaxle 10. The parking mechanism 60 is for locking the drive wheels 2,2 of the vehicle V. The parking mechanism 60 includes components such as a parking pawl 61, a support shaft 63, a torsion spring (not shown), and a rod 65. 【0041】 The parking mechanism 60 locks the drive wheels 2 of the vehicle V based on the driver's operation. More specifically, the parking mechanism 60 restricts the rotation of the intermediate shaft 40 and locks the drive wheels 2,2 based on the driver's operation of setting the vehicle to the P range (parking operation). The details of the parking mechanism 60 will be described below. 【0042】 As shown in Figure 2, the parking pole 61 is a component for locking the parking gear 44. The parking pole 61 is a plate-shaped metal component formed as a long pole. The parking pole 61 is positioned to extend in the vertical direction H. The upper side (upper end) of the parking pole 61 is pivotably supported on a pivot shaft 63 positioned adjacent to the parking gear 44 (in this embodiment, the power gear 32). In other words, the parking pole 61 is supported so as to be able to pivot in a direction toward or toward the parking gear 44 around the pivot shaft 63. To put it another way, the parking pole 61 can pivot toward or toward the parking gear 44, using the pivot shaft 63 as the pivot point, while maintaining an orientation along the vertical direction H of the vehicle V. 【0043】 A claw 62 is formed on the lower Lw side (lower end side) of the parking pawl 61, facing the parking gear 44. The claw 62 can engage with the parking gear 44. A meshing portion 45 is formed at the point where the parking pawl 61 (claw 62) and the parking gear 44 engage. In this embodiment, a protrusion 67 is provided adjacent to the claw 62 on the parking pawl 61. The protrusion 67 is provided to contact the cutting edge (outer edge) of the parking gear 44 when the claw 62 and the parking gear 44 engage, in order to prevent the claw 62 and the parking gear 44 from over-engaging. 【0044】 Furthermore, the parking pawl 61 is biased by a torsion spring (not shown) in a direction away from the parking gear 44. Therefore, when the parking mechanism 60 is not in the parking position, the parking pawl 61 (pawl 62) is separated from the parking gear 44 and is in a disengaged state. Also, when the parking position is engaged, if the rotational speed of the parking gear 44 is high, the pawl 62 is repelled by the parking gear 44, preventing the parking gear 44 and the pawl 62 from engaging. 【0045】 The rod 65 is designed to stroke in a direction intersecting the direction in which the parking pawl 61 extends (towards the foreground in Figure 2). Although not shown in the illustration, the parking mechanism 60 moves in conjunction with the driver's shift operation so that the rod 65 strokes toward the parking pawl 61. When the rod 65 strokes toward the parking pawl 61, the enlarged diameter portion 65a of the rod 65 advances in the stroke direction (towards the foreground in Figure 2), and the base end portion 61a of the parking pawl 61 is pressed toward the parking gear 44 (to the right in the illustration). As a result, the parking pawl 61 swings, and the claw 62 engages with the parking gear 44, forming the engagement portion 45. This locks the rotation of the drive wheels 2,2 of the vehicle V. 【0046】 In this transaxle 10 of the present invention, the meshing portion 45 is located on the lower Lw side of the power gear 32 when viewed in the axial direction of the intermediate shaft 40. Furthermore, the outermost diameter portion of the power gear 32 is positioned so as to overlap (overlap) with at least a portion of the parking pole 61 in the vertical direction when viewed in the axial direction of the intermediate shaft 40. In other words, the outermost diameter portion of the power gear 32 is positioned so as to intersect with at least a portion of the parking pole 61 in the vertical direction H when viewed in the axial direction of the intermediate shaft 40. Moreover, in this embodiment, the axis of the power shaft 30 is offset toward the parking pole 61 side (width direction W) relative to the axes of the intermediate shaft 40 and the drive shaft 26. Therefore, the oil held (accumulated) between the power gear 32 and the intermediate gear 42 is supplied (dripped) onto the parking pole 61 when the vehicle V is started (during low-speed driving at the start of driving). The oil supplied onto the parking pawl 61 is supplied to the claws 62 and the meshing part 45 by gravity as the oil travels along the parking pawl 61. As a result, the meshing part 45 is lubricated by the oil, which suppresses wear and damage to the parking pawl 61 (claws 62) and the parking gear 44. 【0047】 In this embodiment, the parking pawl 61 is positioned to the left of the power gear 32 in an axial view of the power shaft 30, so that oil is easily supplied to the parking pawl 61, especially when reversing. That is, when the vehicle V is reversing, the power gear 32 rotates counterclockwise, so that oil is easily discharged to the left of the power gear 32. Furthermore, in the transmission mechanism 10 of the present invention, even when the vehicle V is moving forward (the power gear 32 rotates clockwise), oil is supplied to the parking pawl 61 in accordance with the rotation of the power gear 32. 【0048】 The above describes one embodiment of the transaxle 10 (speed transmission mechanism 10) of the present invention. Next, the effects and advantages realized by the speed transmission mechanism 10 of the present invention will be described below. 【0049】 <Effects> The transmission mechanism 10 described above has the following characteristic configurations (a) to (f). Therefore, the transmission mechanism 10 of the present invention can achieve the following unique effects that cannot be achieved with prior art. 【0050】 (a) The transmission mechanism 10 of the present invention described above comprises a power shaft 30, a power gear 32 supported on the power shaft 30, a relay shaft 40 that transmits power from the power shaft 30, a relay gear 42 supported on the relay shaft 40, a drive shaft 26 to which the power is transmitted via the relay shaft 40, a parking gear 44 supported on the relay shaft 40, a support shaft 63 arranged adjacent to the parking gear 44, and a parking pawl 61 that is supported so as to be able to swing toward and away from the parking gear 44 about the support shaft 63 and has a claw 62 that can engage with the parking gear 44 as it swings, wherein the relay gear 42 and the parking gear 44 are arranged adjacent to each other in the axial direction of the relay shaft 40, and the engagement portion 45 of the claw 62 and the parking gear 44 is arranged below the power gear 32 in an axial view of the relay shaft 40. 【0051】 By configuring the transmission mechanism 10 of the present invention as described in (a) above, the power gear 32 can be positioned on the Up side of the meshing portion 45 of the parking pawl 61 (claw 62) and the parking gear 44. Here, oil supplied for lubrication during vehicle V operation is held (stored) between the power gear 32 and the intermediate gear 42. Therefore, in the transmission of the present invention, when the vehicle V is started (during low-speed driving accompanying the start of driving), the oil held in the power gear 32 is supplied onto the parking pawl 61, and oil is also supplied (dripped) to the meshing portion 45 of the claw 62 and the parking gear 44 via the parking pawl 61. As a result, the transmission mechanism 10 of the present invention can suppress wear and damage to the meshing portion 45 of the parking gear 44 and the parking pawl 61, especially during low-speed driving of the vehicle V. Here, the transmission mechanism 10 of the present invention can be preferably applied to a transmission or a transaxle equipped with a differential gear. 【0052】 (b) The transmission mechanism 10 of the present invention described above is characterized in that the parking pawl 61 is arranged to extend in the vertical direction H, and the support shaft 63 is located adjacent to the power gear 32. 【0053】 By configuring the transmission mechanism 10 of the present invention as described in (b) above, the engagement portion 45 between the parking pawl 61 (claw 62) and the parking gear 44 can be positioned 2Lw below the power gear 32. This allows the transmission mechanism 10 of the present invention to supply (drip) oil flowing along the parking pawl 61 to the engagement portion 45 between the claw 62 and the parking gear 44. Therefore, the transmission mechanism 10 of the present invention can suppress wear and damage to the engagement portion 45 between the parking gear 44 and the parking pawl 61, especially when the vehicle V is traveling at low speeds. 【0054】 (c) The transmission mechanism 10 of the present invention described above is characterized in that the outermost diameter portion of the power gear 32 is arranged to overlap with at least a part of the parking pole 61 in the vertical direction H when viewed in the axial direction of the relay shaft 40. 【0055】 As a result of the configuration described in (c) above, the transmission mechanism 10 of the present invention allows oil held in the meshing portion 45 of the power gear 32 and the intermediate gear 42 to be supplied (dripped) onto the parking pawl 61 as the power gear 32 and the intermediate gear 42 rotate. This enables the transmission mechanism 10 of the present invention to supply oil flowing along the parking pawl 61 to the claws 62 of the parking pawl 61 and the meshing portion 45 of the parking gear 44, ensuring reliable lubrication of the parking pawl 61 and the meshing portion 45 of the parking gear 44 even when the vehicle V is traveling at a low speed. Therefore, the transmission mechanism 10 of the present invention can suppress wear and damage to the meshing portion 45 of the parking gear 44 and the parking pawl 61, especially when the vehicle V is traveling at a low speed. 【0056】 (d) The transmission mechanism 10 of the present invention described above is characterized in that the power shaft 30 is the output shaft of the drive motor. 【0057】 By configuring the transmission mechanism 10 of the present invention as described in (d) above, the parking gear 44 and parking pawl 61 can be properly lubricated in hybrid vehicles, electric vehicles, and the like. 【0058】 (e) The transmission mechanism 10 of the present invention described above is characterized in that the power shaft 30, the relay shaft 40, and the drive shaft 26 are arranged in the vertical direction H in that order. 【0059】 By configuring the transmission mechanism 10 of the present invention as described in (e) above, the parking gear 44 can be positioned on the intermediate shaft 40 located below the power shaft 30. As a result, the oil held between the power gear 32 and the intermediate gear 42 is supplied (dripped) from above the parking pawl 61. This allows the transmission mechanism 10 of the present invention to supply oil via the parking pawl 61 to the meshing portion 45 between the parking pawl 61 (claw 62) and the parking gear 44. Therefore, even when the vehicle V is traveling at a low speed, the meshing portion 45 of the parking pawl 61 and the parking gear 44 can be reliably lubricated. Consequently, the transmission mechanism 10 of the present invention can suppress wear and damage to the meshing portion 45 of the parking gear 44 and the parking pawl 61, especially when the vehicle V is traveling at a low speed. 【0060】 (f) The transmission mechanism 10 of the present invention described above is characterized in that the axis of the power shaft 30 is offset toward the parking pole 61 side with respect to the axis of the relay shaft 40 and the drive shaft 26. 【0061】 By configuring the transmission mechanism 10 of the present invention as described in (f) above, the power gear 32 is reliably positioned on the parking pawl 61, so that the oil accumulated in the power gear 32 is reliably supplied (dripped) onto the parking pawl 61 when the power gear 32 starts to rotate. As a result, the transmission mechanism 10 of the present invention can supply oil via the parking pawl 61 to the meshing portion 45 between the parking pawl 61 (pawl 62) and the parking gear 44, so that the meshing portion 45 of the parking pawl 61 and the parking gear 44 can be reliably lubricated even when the vehicle V is traveling at a low speed. Therefore, the transmission mechanism 10 of the present invention can suppress wear and damage to the meshing portion 45 of the parking gear 44 and the parking pawl 61. Here, the parking pawl 61 and the support shaft 63 of the parking pawl 61 are preferably positioned on the downstream side in the direction of rotation when the power shaft 30 rotates in the reverse direction of the vehicle V. As a result, the transmission mechanism 10 of the present invention can reliably supply oil to the parking pole 61 when the vehicle V is traveling in reverse (at a low speed). 【0062】 ≪Variations≫ The above describes the effects and advantages obtained by the transmission mechanism 10 according to one embodiment of the present invention. However, the transmission mechanism 10 is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, the transmission mechanism 10 may be as described in (a) above, and can be formed in various shapes and sizes. For example, the shape and size of the transmission mechanism 10 can be changed to various types. In addition, the arrangement of the transmission mechanism 10 on the vehicle V can be arranged in various ways depending on the vehicle V, etc. Furthermore, the transmission mechanism 10 of the present invention may, for example, not have some or all of the components related to (b) to (f) above, or may have some or all of (b) to (f) above and other components, etc. 【0063】 In this embodiment, the case where vehicle V is a series hybrid vehicle was described as an example, but the present invention is not limited thereto and can be suitably applied to various vehicles such as parallel hybrid vehicles, automatic transmission vehicles, and electric vehicles. 【0064】 In this embodiment, a single intermediate shaft 40 is provided, but there may be multiple intermediate shafts 40 as needed. In such cases, it is preferable that oil held between multiple intermediate gears 42 and power gears 32 provided on the multiple intermediate shafts 40 be supplied directly or indirectly (for example, via the parking pawl 61) to the meshing portion 45 of the claw 62 and parking gear 44. In addition, there may be multiple other shafts besides the intermediate shaft 40, such as the power shaft 30 and drive shaft 26. 【0065】 Furthermore, the arrangement of the power shaft 30, relay shaft 40, and drive shaft 26 can be arranged in various ways that achieve the objective of the invention. For example, the power shaft 30, relay shaft 40, and drive shaft 26 may be arranged linearly in the vertical direction H, or they may be arranged alternately offset (in a zigzag pattern), or a pair of shafts may be arranged linearly in the vertical direction H, with the other shaft being offset and inclined from the vertical direction H. 【0066】 Furthermore, in this embodiment, the support shaft 63 of the parking pole 61 is provided on the upper end side of the parking pole 61, but the support shaft 63 can be positioned in various locations as long as the parking pole 61 can be positioned vertically H (including inclination). Also, the support shaft 63 can be positioned in various locations as long as the claws 62 can move closer to and further away from the parking gear 44. For example, the support shaft 63 may be provided near the center of the parking pole 61. In addition, the power gear 32, intermediate gear 42, differential ring gear 22, and differential gear 24 can be set to various sizes and gear ratios according to the characteristics of the vehicle V and the drive motor (electric motor). Also, the power gear 32, intermediate gear 42, and differential ring gear 22 can be arranged in various ways as long as the objective of the invention can be achieved. Furthermore, the power shaft 30, intermediate shaft 40, and drive shaft 26 can be formed in various lengths (including segmented formation), and rotational support can be provided by appropriate means such as bearings 34. Furthermore, although this embodiment describes the case where the transmission mechanism 10 is a transaxle 10 as an example, the transmission mechanism 10 of the present invention can be applied not only to those in which the differential mechanism 20 is integrated, but also to those in which the transmission is a standalone unit. 【0067】 In this embodiment, as described in (a) above, the meshing portion 45 of the claw 62 and the parking gear 44 is positioned below the power gear 32 when viewed in the axial direction of the intermediate shaft 40. However, the meshing portion 45 is not limited to being positioned directly below the power gear 32. For example, the meshing portion 45 may be positioned diagonally below the power gear 32. In other words, as the power gear 32 rotates, the oil held between the power gear 32 and the intermediate gear 42 is supplied (dripped) directly or indirectly to the meshing portion 45. As a result, the meshing portion 45 and the power gear 32 can be positioned in various locations. 【0068】 In this embodiment, the configuration is as shown in (b) above, but the parking pawl 61 can be positioned at various angles as long as it extends inclined toward the meshing portion 45. In addition, the support shaft 63 of the parking pawl 61 can be positioned at various positions according to the shape and size of the parking pawl 61, but it is desirable that the meshing portion 45 (claw 62) be positioned adjacent to the power gear 32 and on the lower Lw side of the power gear 32. 【0069】 In this embodiment, the configuration is as shown in (c) above, but the outermost diameter portion of the power gear 32 does not have to overlap with the parking pawl 61 in the vertical direction. In such cases, it is desirable that the parking pawl 61 or the meshing portion 45 be positioned so that the oil supplied from the power gear 32 is supplied to the parking pawl 61 or the meshing portion 45 as the power gear 32 rotates. 【0070】 Furthermore, although the configuration is as described in (d) above in this embodiment, the power shaft 30 does not have to be the output shaft of the drive motor. For example, the power shaft 30 may be the output shaft of the engine. 【0071】 In this embodiment, the configuration is as shown in (e) above, but the order (arrangement) of the power shaft 30, relay shaft 40, and drive shaft 26 may be changed as long as oil from the power gear 32 is supplied to the parking pawl 61 and the meshing part 45. 【0072】 In this embodiment, the configuration is as described in (f) above, but the axis of the power shaft 30 is not limited to being offset toward the parking pole 61 side with respect to the axis of the relay shaft 40 and the drive shaft 26, but may also not be offset toward the parking pole 61 side. In other words, the parking pole 61 may be located directly below the power gear 32. 【0073】 The above describes various embodiments and modifications of the transmission mechanism 10 according to the present invention. However, the present invention is not limited to those exemplified in the embodiments and modifications described above, and it will be readily apparent to those skilled in the art that other embodiments may exist in the spirit and teachings thereof, without departing from the scope of the claims. [Industrial applicability] 【0074】 The present invention can be used in transmission mechanisms in vehicles such as hybrid vehicles, electric vehicles, and engine-powered vehicles. Furthermore, the present invention can be used in various transmission mechanisms (transmissions, transaxles) that have a parking mechanism. [Explanation of Symbols] 【0075】 10: Transaxle (transmission mechanism) 14:First electric motor (MG1) 16:Second electric motor (MG2) 20: Differential mechanism 22: Differential Ring Gear 24: Differential Gear 26: Drive shaft 30: Power shaft 32: Power Gear 34: Bearings 40: Relay axis 42: Relay Gear 44: Parking gear 45: Interlocking part 60: Parking mechanism 61: Parking pole 62: Nails 63: Support shaft H: Vertical direction (height direction) V: Vehicle

Claims

[Claim 1] Power shaft and The power gear supported by the aforementioned power shaft, A relay shaft that transmits power from the aforementioned power shaft, A relay gear supported on the aforementioned relay shaft, The drive shaft through which the power is transmitted via the relay shaft, A parking gear supported on the aforementioned relay shaft, A support shaft positioned adjacent to the aforementioned parking gear, A parking pawl is supported so as to be able to swing around the aforementioned pivot shaft in a direction toward and away from the parking gear, and has claws that can engage with the parking gear as it swings, Equipped with, The relay gear and the parking gear are arranged adjacent to each other in the axial direction of the relay shaft. The meshing portion of the claw and the parking gear is located below the power gear when viewed in the axial direction of the relay shaft. In an axial view of the aforementioned relay shaft, the shafts are arranged so that they are stacked vertically on top of each other in the order of the power shaft and the relay shaft. The parking pole is arranged to extend vertically, with the support shaft positioned adjacent to the power gear, and the support shaft positioned above the intermediate gear. The axis of the power shaft is positioned offset toward the parking pole side relative to the axes of the relay shaft and the drive shaft. The outermost diameter portion of the power gear is positioned to overlap vertically with at least a portion of the parking pole when viewed in the axial direction of the relay shaft. A speed shifting mechanism characterized in that the meshing portions of the claw and the parking gear are positioned directly below the outermost diameter portion of the power gear.

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