Integrated pump device built-in system

Abstract

In this invention, a pump unit (30) in an integrated pump device (10) rotates under the drive force of a motor unit (20), and pumps in oil from a pump-in port (67) and pumps out the oil to a pump-out port (68). A hydraulic actuator section (60) rotates a detent shaft (81) of a parking lock mechanism (80) to switch the parking lock mechanism between a locked state and an unlocked state. At least one of a pump connecting element on the pump-in side (pump-in port connecting tube) (927) and a pump connecting element on the pump-out side (pump-out port connecting tube) (688), and the detent shaft (81) are disposed in parallel with an assembling direction along which the integrated pump device (10) is assembled onto an axle case (70). In order to avert interference between the designated pump connecting element(s) disposed in parallel with the assembling direction and a rotator (82) that rotates together with the detent shaft (81), the rotational range of the detent shaft (81) is restricted according to the disposition of the designated pump connecting element(s).

Description

Integrated pumping system CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is based on Japanese Application No. 2024-043140, filed on March 19, 2024, the contents of which are incorporated herein by reference.

[0002] The present disclosure relates to an integrated pumping device mounting system.

[0003] Conventionally, systems equipped with a vehicle parking lock actuator are known. For example, Patent Document 1 discloses a vehicle assist device including an electric pump mechanism and a parking lock mechanism. The electric actuator uses the driving force of a motor to drive the pump of the electric pump mechanism and the locking means of the parking lock mechanism. Patent Document 2 discloses a transaxle including an electric pump having a pump section and a motor section, and a transmission mechanism that transmits the driving force of the motor section to a rotation prevention member to prevent rotation of a parking gear section. The electric pump is fixed to a case of the actuator of the transmission mechanism.

[0004] Patent Document 3 discloses an integrated pump device in which an electric oil pump (EOP) driven by a motor and a hydraulic parking lock actuator (PLA) are integrated together.

[0005] JP 2014-185651 A Japanese Patent No. 7281635 A Japanese Patent No. 2023-093012 A

[0006] In this specification, an integrated component such as the integrated pump device of Patent Document 3 is referred to as an "integrated component." Furthermore, among the components connecting the integrated component to the mounted object, those related to the oil transport of the electric pump are referred to as "EOP connection elements," and those related to the transmission of the operating force of the parking lock actuator are referred to as "PLA connection elements."

[0007] In Patent Document 1, an electric actuator in which an electric motor and an electric pump mechanism are integrated with a control device is considered an "integrated product." The supply flow path (oil discharge port) from the electric pump mechanism to the reducer is the discharge-side EOP connection element, and the suction flow path (oil suction port) from the reducer to the electric pump mechanism is the suction-side EOP connection element. The driving force transmission means between the driving force switching mechanism and the parking lock mechanism corresponds to the PLA connection element. Furthermore, in Patent Document 2, an electric pump and transmission mechanism that are integrated are considered an "integrated product." The output shaft of the transmission mechanism corresponds to the PLA connection element.

[0008] Assume that these integrated components are mounted on an axle case of a vehicle. Patent Document 1 discloses the elements that are connected when the axle case is mounted, but does not address the installation issues unique to the integrated component. Patent Document 2 does not disclose the components that are connected when the axle case is mounted or the support structure for them, nor does it address the installation issues unique to the integrated component. For example, if the orientations of multiple connection elements are different, the number of installation steps increases. Furthermore, if the orientations of multiple connection elements are the same, the axle case will become larger.

[0009] The integrated pump device of Patent Document 3 contributes to the miniaturization of vehicle electric accessories. However, because the EOP connection element and PLA connection element are densely packed, issues arise regarding the ease of installation on the axle case and the size of the axle case. The prior art of Patent Documents 1 and 2 is not helpful in considering solutions to these issues.

[0010] An object of the present disclosure is to provide an integrated pump device mounting system that improves mountability and reduces the size of the axle case in a system in which an integrated pump device that integrates an electric oil pump and a hydraulic parking lock actuator is mounted on an axle case.

[0011] The present disclosure relates to an integrated pump device mounting system including an integrated pump device mounted on an axle case of a vehicle. The integrated pump device is integrally configured with a motor unit, a pump unit, and a rotary hydraulic actuator unit.

[0012] The pump unit is rotated by the driving force of the motor unit and discharges oil drawn in from an inlet to an outlet. The hydraulic actuator unit rotates the detent shaft of the parking lock mechanism using hydraulic pressure supplied from the pump unit, switching between a locked state and an unlocked state.

[0013] A suction-side pump connecting element is connected to the suction port. A discharge-side pump connecting element, which is provided separately from or integrally with the housing of the integrated pump device, is connected to the discharge port. At least one of the suction-side pump connecting element and the discharge-side pump connecting element and the detent shaft are arranged parallel to the assembly direction in which the integrated pump device is assembled to the axle case.

[0014] The pump connection element of the suction-side pump connection element and the discharge-side pump connection element that is arranged parallel to the assembly direction is defined as the specific pump connection element. In this integrated pump device mounting system, the rotation range of the detent shaft is limited according to the arrangement of the specific pump connection element to avoid interference between the specific pump connection element and the rotating body that rotates together with the detent shaft.

[0015] As a result, the integrated pump unit mounting system of the present disclosure can efficiently avoid interference between the connecting elements of the integrated pump unit and the axle case, thereby improving mountability and enabling the axle case to be made smaller.

[0016] The above and other objects, features, and advantages of the present disclosure will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which Fig. 1 is a diagram showing a schematic layout of an integrated pump device and connecting elements of the integrated pump device when mounted on an e-Axle case, Fig. 2 is a configuration diagram of a hydraulic system including the integrated pump device of one embodiment, Fig. 3 is an exploded perspective view showing the assembly of the integrated pump device to the e-Axle case of the first embodiment, Fig. 4 is an exploded perspective view showing the assembly of the integrated pump device to the e-Axle case of the second embodiment, Fig. 5 is an exploded perspective view showing the assembly of the integrated pump device to the e-Axle case of the third embodiment, Fig. 6 is a front view of the e-Axle case of the third embodiment, Fig. 7 is a cross-sectional view taken along line VII-VII of Fig. 6, and Fig. 8 is a cross-sectional view taken along line VIII-VIII of Fig. 6 showing the state in which the integrated pump device is assembled to the e-Axle case of the third embodiment. FIG. 14 is a view in the direction of arrow XIV of FIG. 13 , FIG. 15 is a view in the direction of arrow XIV of FIG. 13 , FIG. 16 is a view in the direction of arrow XIV of FIG. 13 , FIG. 17 is a view in the direction of arrow XIV of FIG. 14 , FIG. 18 is a view in the direction of arrow XIV of FIG. 15 , FIG. 18 is a view in the direction of arrow XIV of FIG. 13 , FIG. 19 is a view in the direction of arrow XIV of FIG. 19 , FIG. 20 is a view in the direction of arrow XIV of FIG. 21 , FIG. 22 is a view in the direction of arrow XIV of FIG. 22 , FIG. 23 is a view in the direction of arrow XIV of FIG. 23 , FIG. 24 is a view in the direction of arrow XIV of FIG. 24 , FIG. 25 is a view in the direction of arrow XIV of FIG. 25 , FIG. 26 is a view in the direction of arrow XIV of FIG. 26 , FIG. 27 is a view in the direction of arrow XIV of FIG. 27 , FIG. 28 is a view in the direction of arrow XIV of FIG. 28 , FIG. 29 is a view in the direction of arrow XIV of FIG. 29 , FIG. 30 is a view in the direction of arrow XIV of FIG. 30 , FIG. 31 is a view in the direction of arrow XIV of FIG. 31 , FIG. 32 is a view in the direction of arrow XIV of FIG. 32 , FIG. 33 is a view in the direction of arrow XIV of FIG. 33 , FIG. 34 is a view in the direction of arrow XIV of FIG. 34 , FIG. 35 is a view in the direction of arrow XIV of FIG. 35 , FIG. 36

[0017] An embodiment of an integrated pump unit mounted system will be described with reference to the drawings. The integrated pump unit mounted system is a system in which an integrated pump unit is mounted in an axle case, which is the housing of a vehicle's axle mechanism. In this embodiment, application to an e-Axle mechanism of an electric vehicle is particularly assumed, and the term "e-Axle case" is used instead of the general term "axle case." The integrated pump unit, for example, activates the parking lock mechanism in an autonomous electric vehicle. The integrated pump unit also supplies oil for cooling or lubrication to an MG, etc.

[0018] First, an overview of the integrated pump unit mounting system will be described with reference to Figures 1 and 2. Figure 1 shows the integrated pump unit 10 and a schematic layout of the connection elements that are connected to the integrated pump unit 10 when mounted on an e-Axle case 70. Figure 2 shows the configuration of a hydraulic system including the integrated pump unit 10 of one embodiment.

[0019] The integrated pump device 10 is configured integrally with a motor unit 20, a pump unit 30, and a rotary hydraulic actuator unit 60. In one embodiment, the motor unit 20 and the hydraulic actuator unit 60 are substantially cylindrical, and the pump unit 30 is substantially rectangular. The motor unit 20, the pump unit 30, and the hydraulic actuator unit 60 are arranged in series in this order. A motor rotation axis M common to the motor unit 20 and the pump unit 30 is arranged coaxially with or parallel to an actuator rotation axis O of the hydraulic actuator unit 60. Hereinafter, the actuator rotation axis O will be simply referred to as the "rotation axis O."

[0020] Hereinafter, the direction of the rotation axis O will be referred to as the "axial direction," and a plane perpendicular to the axial direction will be referred to as the "axially orthogonal plane." The integrated pump device 10 is assembled to the e-Axle case 70 along the axial direction, from the motor unit 20 side toward the hydraulic actuator unit 60 side. This direction will be defined as the "assembly direction." Figures such as Figure 10 correspond to projections of the axially orthogonal plane as viewed in the opposite direction to the assembly direction. An intake port 67 and a discharge port 68 open at the axial end face of the hydraulic actuator unit 60. The internal structure of the integrated pump device 10 will be described later with reference to Figure 8.

[0021] The pump unit 30 is an electric oil pump (EOP) that rotates by the driving force of the motor unit 20, and discharges oil drawn in from an intake port 67 to an outlet port 68. Specifically, the oil is drawn in from a suction filter 92 or the like provided upstream of the oil passage. In one embodiment of the integrated pump device 10, the oil pumped by the pump unit 30 is discharged via the hydraulic actuator unit 60 to an oil consumer 97 such as an MG or reducer provided downstream of the oil passage. This function is referred to as the "EOP function."

[0022] The hydraulic actuator unit 60 rotates a detent shaft 81 of the parking lock mechanism 80 using an actuation force generated by hydraulic pressure supplied from the pump unit 30, thereby switching between a locked state and an unlocked state. This function is referred to as a "PLA (parking lock actuator) function" or a "PBW (park-by-wire) function."

[0023] Components connected to the integrated pump device 10 in relation to the EOP function are called "EOP connection elements," and form part of the oil passage in the hydraulic system. Among them, the upstream element of the oil passage connected to the suction port 67 is called the "suction-side pump connection element," and the downstream element of the oil passage connected to the discharge port 68 is called the "discharge-side pump connection element."

[0024] The suction-side pump connection element is, for example, an inlet connection pipe 927 that protrudes from the main body of the suction filter 92. The main body of the suction filter 92 has a flattened rectangular parallelepiped shape extending in the longitudinal direction. In the specification shown in FIG. 1, the inlet connection pipe 927 protrudes from one longitudinal end of the main body. This is not limited to this, and there are also specifications in which the inlet connection pipe 927 protrudes upward from the middle in the longitudinal direction, as shown in, for example, FIGS. 13 to 15. In this embodiment, only the inlet connection pipe 927 of the suction filter 92 that is directly connected to the integrated pump device 10 will be described as the "suction-side pump connection element." The discharge-side pump connection element is, for example, an outlet connection pipe 688. In this embodiment, the outlet connection pipe 688 is provided separately from the housing of the integrated pump device 10.

[0025] Components connected to the integrated pump device 10 in relation to the PLA function are referred to as "PLA connection elements." The first PLA connection element, a detent shaft 81, is connected to the vane rotor 63 (see FIG. 8) of the hydraulic actuator unit 60 on a rotation axis O, and the rotational output of the hydraulic actuator unit 60 is transmitted to the detent shaft 81. The detent plate 82, which serves as a "rotating body" that rotates together with the detent shaft 81, and the parking rod 85 (see FIGS. 3, 10, etc.), which reciprocates in conjunction with the rotation of the detent plate 82, are also included in the PLA connection elements.

[0026] In the integrated pump device mounting system of this embodiment, at least one of the suction-side pump connecting element and the discharge-side pump connecting element and the detent shaft 81 are arranged parallel to the assembly direction, i.e., parallel to the axial direction. It is considered common technical knowledge that the detent shaft 81 is arranged parallel to the assembly direction. However, it is not necessary for the EOP connecting element to be arranged parallel to the axial direction. For example, the EOP connecting element may be arranged radially of the integrated pump device 10, and still function properly.

[0027] However, in this embodiment, a configuration is adopted in which one or both of the suction-side pump connecting element and the discharge-side pump connecting element are arranged parallel to the assembly direction in consideration of improving the ease of assembly and mounting to the e-Axle case 70. In the example of Figure 1, both the suction port connecting pipe 927 and the discharge port connecting pipe 688 are arranged parallel to the assembly direction, but either one may be arranged in a direction different from the assembly direction.

[0028] Here, the EOP connection element of the suction-side pump connection element and the discharge-side pump connection element that is arranged parallel to the assembly direction is defined as the “specific pump connection element.” In other words, in the integrated pump device mounting system of this embodiment, the specific pump connection element and the detent shaft 81 are arranged parallel to the assembly direction.

[0029] By assembling the specific pump connection element and the detent shaft 81 in the same direction during the assembly process to the e-Axle case 70, it is possible to "simultaneously connect" at least a portion of the EOP connection element and the PLA connection element. Note that the definition of "simultaneously" in "simultaneous connection" refers to the same process, not the same time. Achieving simultaneous connection improves assembly and mounting ease. It also improves the manufacturability of the e-Axle case 70.

[0030] Furthermore, in the integrated pump unit mounting system of this embodiment, the rotation range of the detent shaft 81 is limited depending on the arrangement of the specific pump connecting element to avoid interference between the specific pump connecting element and the detent plate 82. This effectively prevents interference between the connecting elements. Details regarding interference avoidance will be described later with reference to FIGS. 9 to 17.

[0031] [Embodiments of e-Axle Case] ​​Next, with reference to Figures 3 to 8, several embodiments of the e-Axle case 70 that are preferable for properly performing simultaneous connection work will be described. Substantially identical configurations in several embodiments are given the same reference numerals, and descriptions thereof will be omitted. The reference numerals for the e-Axle case in each embodiment have the embodiment number added as the third digit following "70." Similarly, the reference numerals for the mounting opening and the protruding portion also have the embodiment number added as the third digit.

[0032] 3 has a mounting opening 721 formed inside the outer frame 71. When assembling the integrated pump device 10 to the e-axle case 701, the specific pump connecting elements, that is, the outlet port connecting pipe 688 and the suction port connecting pipe 927, are inserted into the mounting opening 721 in the same direction as the detent shaft 81, and a portion of the integrated pump device 10 is inserted into the mounting opening 721.

[0033] The suction port connecting pipe 927, which is a suction-side pump connecting element, is connected to the suction port 67 of the integrated pump device 10. The discharge port connecting pipe 688, which is a discharge-side pump connecting element, is connected to the discharge port 68 of the integrated pump device 10. The detent shaft 81, which is a PLA connecting element, is connected to the center of the housing of the integrated pump device 10 together with the accompanying detent plate 82 and parking rod 85. The cone 86 and parking lock pole 87 will be described later with reference to FIG. 10 .

[0034] By forming the mounting opening 721 in the e-Axle case 701, a portion of the integrated pump device 10 can be embedded inside the e-Axle case 701 during the simultaneous connection of a specific pump connection element and a PLA connection element. This will be described in detail later with reference to Figure 8. This allows the e-Axle case 701 to be made compact while maintaining high ease of assembly.

[0035] 4 has the same configuration as the e-Axle case 701 of the first embodiment, but also has a protruding portion 732 integrally formed therewith, protruding inward from the inner wall of the mounting opening 722. The protruding portion 732 is formed with a shaft support hole 74 in which the detent shaft 81 is supported, and an insertion hole 75 into which a specific pump connecting element is inserted.

[0036] When assembling the integrated pump device 10, there may be cases where the worker is unable to see the inside of the e-Axle case 702. By integrally providing the protruding portion 732 in which the shaft support hole 74 and the fitting hole 75 are formed, variation in the position of the shaft support hole 74 and the fitting hole 75 relative to the positioning portion is reduced. Therefore, even when the inside of the e-Axle case 702 is not visible, the simultaneous connection of the detent shaft 81 and the specific pump connecting element is more reliable, allowing for more efficient work.

[0037] The protruding portion 732 of the second embodiment is formed in a substantially triangular shape that can secure the minimum space necessary to form the shaft support hole 74 and the fitting hole 75, and is provided so as to protrude downward from the upper inner wall of the mounting opening 722. Therefore, the weight of the e-Axle case 702 can be reduced.

[0038] 5, in addition to the configuration of e-Axle case 702 of the second embodiment, protruding portion 733 is connected to the inner wall of mounting opening 723 over a length equal to or greater than half of the inner circumference of mounting opening 723. Approximately half of mounting opening 723 is blocked by protruding portion 733, which can also be described as a "half-bag shape."

[0039] 6 and 7 show the front shape of the e-Axle case 703 alone and its cross-sectional shape at the central horizontal plane (cross-section along line VII-VII in FIG. 6) passing through the center O of the shaft support hole 74. The protruding portion 733 of the third embodiment is connected to the entire inner wall of the mounting opening 722 above the central horizontal plane and to a portion of the inner wall below the central horizontal plane. In other words, the space between the lower edge of the protruding portion 733 and the lower portion of the outer frame portion 71 essentially forms the mounting opening 723. This increases the rigidity of the e-Axle case 703 and improves reliability during simultaneous connection work.

[0040] Figure 8 shows a cross section of the integrated pump device 10 assembled to the e-Axle case 703. The e-Axle case 703 corresponds to the cross section taken along line VIII-VIII in Figure 6. While Figure 8 shows an example in which the fitting hole 75 is L-shaped, it may also be straight. The outlet of the fitting hole 75 communicates with an oil consumer 97 such as an MG.

[0041] A brief description will be given of the internal configuration of the integrated pump device 10. One end of the shaft 24 of the motor unit 20 is connected to an internal gear 321 of a pump gear 32 housed in the pump unit 30. Rotation of the shaft 24 causes the internal gear 321 to rotate inside the external gear 322, thereby supplying hydraulic pressure from the pump unit 30 through the pump plate 50 into the vane housing 61 of the hydraulic actuator unit 60.

[0042] The hydraulic supply oil path switches depending on the rotation direction of the pump unit 30, causing the vane rotor 63 housed in the vane housing 61 to rotate in both directions. Accordingly, the detent shaft 81 connected to the central axis of the vane rotor 63 rotates in both directions. Furthermore, when the vane rotor 63 reaches a predetermined rotation position, the oil path to the discharge port 68 is opened, and oil drawn in from the suction port 67 is discharged from the discharge port 68.

[0043] Of the total axial length Lt of the integrated pump device 10, the axial length inserted into the e-Axle case 703 is represented as the embedded length Li, and the axial length excluding the embedded length Li is represented as the protruding length Lo. By making a portion of the total axial length Lt the embedded length Li, the protruding length Lo to the outside is reduced. Therefore, the e-Axle case 703 can be made smaller when the integrated pump device 10 is installed.

[0044] Furthermore, since the pump plate 50 and the hydraulic actuator unit 60 are housed inside the e-Axle case 703, even if oil leaks, the oil remains inside the e-Axle case 703 and is prevented from leaking to the outside. Oil leakage from the pump unit 30 to the motor unit 20 side is sealed by an oil seal 246 provided in the middle of the shaft 24.

[0045] [Limitation of rotation range of detent shaft] With reference to Figures 9 to 17, we will explain the limitation of the rotation range of the detent shaft 81 depending on the arrangement of a specific pump connection element, either the suction side pump connection element or the discharge side pump connection element, that is arranged parallel to the assembly direction.

[0046] If the detent plate 82, as a "rotating body," operates within the axial range of the connecting element, there is a risk of interference when the detent plate 82 operates, depending on the arrangement of the connecting element. However, if the axis-orthogonal plane on which the detent plate 82 operates is shifted from the axial range of the connecting element to avoid interference, the axial size of the e-Axle case 70 increases. For example, in the mounting configuration shown in FIG. 8 , the axis-orthogonal plane on which the detent plate 82 operates is shifted from the axial range of the discharge port connecting pipe 688. Therefore, a mounting configuration is required that can efficiently avoid interference between the connecting element and the detent plate 82 and reduce the axial size of the e-Axle case 70.

[0047] The definition of the layout areas in 90° increments in the layout division coordinates will be explained with reference to Figure 9. In this layout division coordinates, when the integrated pump device 10 is viewed from the e-Axle case 70 side in the direction opposite to the assembly direction (direction IX in Figure 1), the origin O is the rotation center of the detent shaft 81. The angle increases counterclockwise, with 0° to the right of the horizontal line passing through the origin O. The direction of the horizontal line corresponds to the direction parallel to the road surface when the device is mounted on a vehicle. The symbol "O" is both the symbol for the rotation axis and the symbol for the origin.

[0048] In this arrangement division coordinate, four arrangement regions are defined: the range from 0° to 90° is the first region, the range from 90° to 180° is the second region, the range from 180° to 270° is the third region, and the range from 270° to 360° is the fourth region. In the figure, the first to fourth regions are represented by the symbols "I", "II", "III", and "IV", respectively.

[0049] Figures 10 to 15 show four arrangement examples (1) to (4) in which one specific pump connecting element is arranged in one of the arrangement regions. Here, "arranged in one of the arrangement regions" means that the entire outer shape of the specific pump connecting element is included in that arrangement region in a plane perpendicular to the axis along which the detent plate 82 operates. Figure 16 shows a combined arrangement example (5) in which two specific pump connecting elements are each arranged in one of the arrangement regions. Figure 17 also shows another arrangement example in which the specific pump connecting element is arranged across two arrangement regions.

[0050] The rotation range of the detent shaft 81 is limited so that the detent plate 82 operates within an angular range of 270°, which is the sum of the three arrangement regions excluding the arrangement region in which the specific pump connecting element is located. Here, the shortest distance from the origin O to the outer shape of the specific pump connecting element is defined as the critical radius Rc. "The detent plate 82 operates within an angular range" means that the entire outer shape of the detent plate 82 is included within that angular range in a radial region equal to or greater than the critical radius Rc.

[0051] Furthermore, the point where the circumferential outer edge of the detent plate 82 intersects with an imaginary circle of critical radius Rc is defined as the critical intersection point Q, and the angle formed by the line connecting the origin O and the critical intersection point Q with the circumferential center line of the detent plate 82 is defined as the margin angle φ. The rotation range of the detent shaft 81 can be rephrased as follows: "The rotation range of the detent shaft 81 is limited so that the circumferential center line of the detent plate 82 rotates within an angular range of (270-2φ)° obtained by subtracting the margin angle φ from both ends of the angle range of the combined three arrangement regions excluding the arrangement region in which the specific pump connecting element is arranged."

[0052] In the arrangement examples (1) and (2) shown in FIGS. 10 to 12 , the suction port connecting pipe 927, which is a suction-side pump connecting element, is considered to be a specific pump connecting element that requires interference avoidance. The suction port 67 of the integrated pump device 10 is located below the rotation axis O to ensure connectivity with the suction filter 92 located upstream of the oil passage. Therefore, the suction port connecting pipe 927 is located in the third or fourth region. As shown in FIGS. 1 and 11 , the axial range of the suction filter 92 body is offset from the axis-orthogonal plane on which the detent plate 82 operates, and therefore does not interfere regardless of the rotation range of the detent shaft 81. Therefore, only the suction port connecting pipe 927, whose axial range overlaps the axis-orthogonal plane on which the detent plate 82 operates, is considered to be a suction-side pump connecting element that requires interference avoidance. The discharge port connecting pipe 688, which is a discharge-side pump connecting element, is located perpendicular to the assembly direction and does not qualify as a specific pump connecting element.

[0053] In the detent mechanism, as the detent plate 82 rotates, the detent roller 84 rides over a peak and fits into one of two valleys due to the elastic force of the detent spring 83, thereby switching between the P range (solid line in the figure) and the not P range (chain double-dashed line in the figure). Generally, the rotation angle of the detent shaft 81 is set to 45° or less. In the illustrated example, the operating angle θr of the detent shaft 81 is approximately 23°.

[0054] In the parking lock mechanism 80, the rotation of the detent plate 82 causes the parking rod 85 to reciprocate in the P direction and the not P direction. This causes a parking lock pole 87, which abuts against the conical surface of a cone 86 provided on the parking rod 85, to swing around its axis as a fulcrum. When the parking rod 85 moves in the P direction, the convex portion of the parking lock pole 87 engages with the parking gear 88, thereby entering a locked state. When the parking rod 85 moves in the not P direction, the convex portion of the parking lock pole 87 separates from the parking gear 88, thereby releasing the locked state.

[0055] In Arrangement Example (1), the suction port connecting pipe 927 is arranged in the third region. In this case, the rotation range of the detent shaft 81 is limited so that the detent plate 82 operates within a range that is the combination of the fourth region, the first region, and the second region. In Arrangement Example (2), the suction port connecting pipe 927 is arranged in the fourth region. In this case, the rotation range of the detent shaft 81 is limited so that the detent plate 82 operates within a range that is the combination of the first region, the second region, and the third region. This makes it possible to efficiently avoid interference between the suction port connecting pipe 927 and the detent plate 82 while reducing the size of the e-Axle case 70.

[0056] In the arrangement examples (3) and (4) shown in Figures 13 to 15, the discharge port connecting pipe 688, which is the discharge-side pump connecting element, is the specific pump connecting element to be subjected to interference avoidance. The discharge port 68 of the integrated pump device 10 is provided above the rotation axis O in consideration of connectivity with the oil cooler, MG, and the like located downstream in the oil passage. Therefore, the discharge port connecting pipe 688 is located in the first or second region. The suction port connecting pipe 927, which is the suction-side pump connecting element, is located perpendicular to the assembly direction and does not fall under the category of the specific pump connecting element.

[0057] In Arrangement Example (3), the discharge port connecting pipe 688 is arranged in the first region. In this case, the rotation range of the detent shaft 81 is limited so that the detent plate 82 operates within a range that is the combined range of the second region, the third region, and the fourth region. In Arrangement Example (4), the discharge port connecting pipe 688 is arranged in the second region. In this case, the rotation range of the detent shaft 81 is limited so that the detent plate 82 operates within a range that is the combined range of the third region, the fourth region, and the first region. This makes it possible to efficiently avoid interference between the discharge port connecting pipe 688 and the detent plate 82 while reducing the size of the e-Axle case 70.

[0058] Arrangement example (5) shown in Figure 16 is an arrangement example that combines the suction-side pump connecting element configuration of Arrangement example (1) with the discharge-side pump connecting element configuration of Arrangement example (4). Arrangement example (5) also corresponds to Figure 1, and is a specific pump connecting element in which both the suction port connecting pipe 927 and the discharge port connecting pipe 688 are arranged parallel to the assembly direction. The suction port connecting pipe 927 is arranged in the third region, and the discharge port connecting pipe 688 is arranged in the second region.

[0059] In this case, the rotation range of the detent shaft 81 is limited so that the detent plate 82 operates within the "combined range of the fourth region and the first region" that is common to the "combined range of the fourth region, the first region, and the second region" in Arrangement Example (1) and the "combined range of the third region, the fourth region, and the first region" in Arrangement Example (4). Similarly, in an arrangement example that combines Arrangement Example (2) and Arrangement Example (3), the rotation range of the detent shaft 81 is limited so that the detent plate 82 operates within the "combined range of the second region and the third region."

[0060] In this way, when both the suction side pump connecting element and the discharge side pump connecting element are specific pump connecting elements, interference between the EOP connecting element and the detent plate 82 can be efficiently avoided by combining a common allowable rotation range for each EOP connecting element.

[0061] Another arrangement example will be described with reference to Figure 17. In this arrangement example, the suction port connecting pipe 927 is arranged across the third and fourth regions, and the discharge port connecting pipe 688 is arranged across the first and second regions. In this case, it is generally expressed as "the rotation range of the detent shaft is limited according to the arrangement of the specific pump connecting element (i.e., the suction port connecting pipe 927 and the discharge port connecting pipe 688) so as to avoid interference between the detent plate 82 and the specific pump connecting element." This provides the same effects as those of the above arrangement examples (1) to (5).

[0062] (Other Embodiments) (a) In the above embodiment, a system in which an integrated pump device is mounted in the e-Axle case of an electric vehicle is particularly envisioned, but the mounting system according to the present disclosure can also be applied to hybrid vehicles or engine vehicles equipped with an auxiliary battery that serves as a power source for the motor. When applied to an axle mechanism (axle power transmission mechanism) in a vehicle other than an electric vehicle, the term "e-Axle case" can be read as the general term "axle case."

[0063] (b) Figure 18 shows the configuration of a hydraulic system including an integrated pump device of another embodiment different from that of Figure 2. The integrated pump device of this embodiment is disclosed in International Publication No. 2022 / 130671. The oil discharged from the pump unit 30 is discharged to an oil consumer 97 such as an MG or a reducer via a supply oil path branching off from the oil path to the hydraulic actuator unit 60. For example, by providing a discharge port from the pump unit 30 that does not pass through the interior of the vane housing 61 parallel to the assembly direction, the above-described mounting configuration for the e-Axle case 70 can be similarly applied to the integrated pump device of this embodiment.

[0064] (c) In the above embodiment, the discharge port connecting pipe 688, which is provided separately from the housing of the integrated pump device 10, is connected to the discharge port 68 of the integrated pump device 10. In this configuration, a common integrated pump device 10 can be installed for multiple types of e-Axle cases 70 with different sizes and shapes of connection holes by simply changing the discharge port connecting pipe used. However, if the e-Axle case 70 to be installed only has one type of connection hole, the discharge port connecting pipe may be provided integrally with the housing of the integrated pump device 10. Even in an integrated configuration, the discharge port connecting pipe is considered to be a "discharge-side pump connecting element" connected to the discharge port 68 of the integrated pump device 10, and the description of the above embodiment applies.

[0065] (d) The suction-side pump connecting element is not limited to the suction port connecting pipe 927, but may be any component located upstream of the oil passage and connected to the suction port 67. For example, if the length of the suction port connecting pipe 927 is shorter than that of Figures 1 and 11 and the axis-orthogonal plane on which the detent plate 82 operates is included in the axial range of the main body of the suction filter 92, it is appropriate to treat the entire suction filter 92, including the suction port connecting pipe 927, as the "suction-side pump connecting element." The discharge-side pump connecting element is not limited to the discharge port connecting pipe 688, but may be any component located downstream of the oil passage and connected to the discharge port 68.

[0066] As described above, the present disclosure is not limited to the above-described embodiment, and can be implemented in various forms without departing from the spirit of the present disclosure.

[0067] The present disclosure has been described based on the embodiments. However, the present disclosure is not limited to the embodiments and structures. The present disclosure also encompasses various modifications and variations within the scope of equivalents. Furthermore, various combinations and forms, including only one element, more than one element, or less than one element, are also within the scope and spirit of the present disclosure.

Claims

1. An integrated pump device (10) is mounted on an axle case (70) of a vehicle and integrally comprises: a motor section (20); a pump section (30) that rotates by the driving force of the motor section and discharges oil drawn in from an intake port (67) to an outlet port (68); and a rotary hydraulic actuator section (60) that rotates a detent shaft (81) of a parking lock mechanism (80) by hydraulic pressure supplied from the pump section, thereby switching between a locked state and an unlocked state; wherein an intake-side pump connecting element (927, 92) is connected to the intake port, and a discharge-side pump connecting element (688) that is provided separately from or integral with a housing of the integrated pump device is connected to the outlet port, and at least one of the intake-side pump connecting element or the discharge-side pump connecting element and the detent shaft are arranged parallel to the assembly direction in which the integrated pump device is assembled to the axle case, If the pump connection element of the suction side pump connection element and the discharge side pump connection element that is arranged parallel to the assembly direction is defined as a specific pump connection element, the rotation range of the detent shaft is limited depending on the arrangement of the specific pump connection element so as to avoid interference between the specific pump connection element and a rotating body (82) that rotates together with the detent shaft.

2. The integrated pump device mounting system of claim 1, wherein, when the integrated pump device is viewed from the axle case side in a direction opposite to the assembly direction, the center of rotation of the detent shaft is defined as the origin, and the angle increases counterclockwise from 0° to the right of the horizontal line passing through the origin, and four placement regions are defined: a first region ranging from 0° to 90°, a second region ranging from 90° to 180°, a third region ranging from 180° to 270°, and a fourth region ranging from 270° to 360°; wherein one specific pump connecting element is disposed in any one of the placement regions, and the rotation range of the detent shaft is limited so that the rotating body operates within the combined range of the three placement regions excluding the placement region in which the specific pump connecting element is disposed.

3. The integrated pump device mounting system of claim 2, wherein the specific pump connection element is the suction side pump connection element, and the suction side pump connection element is located in the third region, and the rotation range of the detent shaft is limited so that the rotating body operates within a range that is a combination of the fourth region, the first region, and the second region, or the suction side pump connection element is located in the fourth region, and the rotation range of the detent shaft is limited so that the rotating body operates within a range that is a combination of the first region, the second region, and the third region.

4. An integrated pump device mounting system as described in claim 2, wherein the specific pump connection element is the discharge side pump connection element, and the discharge side pump connection element is arranged in the first region, and the rotation range of the detent shaft is limited so that the rotating body operates within a range that is a combination of the second region, the third region, and the fourth region, or the discharge side pump connection element is arranged in the second region, and the rotation range of the detent shaft is limited so that the rotating body operates within a range that is a combination of the third region, the fourth region, and the first region.

5. An integrated pump device mounting system as described in any one of claims 1 to 4, wherein the axle case (701-703) has a mounting opening (721-723) into which the specific pump connection element is inserted in the same direction as the detent shaft during assembly of the integrated pump device, and into which a portion of the integrated pump device is inserted.

6. The integrated pump device mounting system described in claim 5, wherein the axle case (702, 703) is integrally provided with a protruding portion (732, 733) that protrudes inward from the inner wall of the mounting opening, and the protruding portion is formed with a shaft support hole (74) in which the detent shaft is supported and an insertion hole (75) in which the specific pump connection element is inserted.

7. An integrated pump device mounting system as described in claim 6, wherein the protrusion (733) of the axle case (703) is connected to the inner wall of the mounting opening over a length equal to or greater than half of the inner circumference of the mounting opening.

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