Integrated pump device mounting system

Abstract

The pump portion (30) of the integrated pump device (10) is rotated by a driving force of the motor portion (20) to discharge oil taken in from the suction port (67) to the discharge port (68). The hydraulic actuator portion (60) rotates a stop shaft (81) of a parking lock mechanism (80) to switch between a locked state and a lock release state. At least one of a suction side pump connecting element (suction port connecting pipe) (927) or a discharge side pump connecting element (discharge port connecting pipe) (688) and the stop shaft (81) are arranged in parallel to an assembly direction of the integrated pump device (10) with respect to the axle housing (70). A rotation range of the stop shaft (81) is limited according to the arrangement of the specific pump connecting element to avoid interference between the specific pump connecting element arranged in parallel to the assembly direction and a rotating body (82) that rotates together with the stop shaft (81).

Description

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

[0002] This disclosure relates to an integrated pump device mounting system. Background Technology

[0003] Previously, systems equipped with parking lock actuators for vehicles were known. For example, Patent Document 1 discloses a vehicle auxiliary device comprising an electric pump mechanism and a parking lock mechanism. The electric actuator drives the pump of the electric pump mechanism and the locking unit of the parking lock mechanism by the driving force of a motor. Patent Document 2 discloses a transmission drive axle comprising: 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-preventing member to prevent rotation of the parking gear section. The electric pump is fixed to the actuator housing of the transmission mechanism.

[0004] Patent document 3 discloses an integrated pump device consisting of a motor-driven electric oil pump (EOP) and a hydraulic parking lock actuator (PLA).

[0005] Existing technical documents Patent documents Patent Document 1: Japanese Patent Application Publication No. 2014-185651 Patent Document 2: Japanese Patent No. 7281635 Patent Document 3: Japanese Patent Application Publication No. 2023-093012 Summary of the Invention

[0006] In this specification, the integrated component such as the integrated pump device in Patent Document 3 is referred to as an "integrated product". In addition, the components that connect the integrated product and the mounted object and are related to the oil delivery of the electric pump are referred to as "EOP connection elements", and the components that are related to the force transmission of the parking lock actuator are referred to as "PLA connection elements".

[0007] In Patent Document 1, an electric actuator that integrates an electric motor, an electric pump mechanism, and a control device is considered an "integrated product." The supply flow path (oil outlet) from the electric pump mechanism to the reducer is the discharge-side EOP connection element, and the suction flow path (oil inlet) from the reducer to the electric pump mechanism is the suction-side EOP connection element. The drive force transmission unit between the drive force switching mechanism and the parking lock mechanism is equivalent to a PLA connection element. In Patent Document 2, an integrated electric pump and transmission mechanism are considered an "integrated product." The output shaft of the transmission mechanism is equivalent to a PLA connection element.

[0008] It is envisioned that these integrated components be mounted on the axle housing of a vehicle. Patent Document 1 discloses the elements connected during axle housing mounting, but does not describe the mounting issues that exist if they are integrated components. Patent Document 2 does not disclose the components connected during axle housing mounting, their support structures, nor does it describe the mounting issues that exist if they are integrated components. For example, if the orientations of multiple connecting elements are different, the mounting process increases. In addition, if the orientations of multiple connecting elements are the same, it will lead to a larger axle housing.

[0009] The integrated pump device in Patent Document 3 contributes to the miniaturization of the vehicle's electric auxiliary equipment. However, due to the dense arrangement of EOP and PLA connection elements, issues arise regarding the mounting capability of the axle housing and the enlargement of the axle housing. In addressing these issues, the prior art of Patent Documents 1 and 2 will not be considered.

[0010] The purpose of this disclosure is to provide an integrated pump device mounting system, in which an integrated pump device comprising an electric oil pump and a hydraulic parking lock actuator is mounted on an axle housing, thereby improving mounting performance and achieving miniaturization of the axle housing.

[0011] This disclosure relates to an invention of an integrated pump unit mounting system comprising an integrated pump unit mounted on a vehicle axle housing. The integrated pump unit is integrally composed of a motor unit, a pump unit, and a rotary hydraulic actuator unit.

[0012] The pump unit rotates under the driving force of the motor unit, discharging the oil drawn in from the suction port to the discharge port. The hydraulic actuator unit rotates the stop shaft of the parking lock mechanism by hydraulic pressure supplied from the pump unit, thereby switching between the locked state and the unlocked state.

[0013] A suction-side pump connection element is connected to the suction inlet. A discharge-side pump connection element is connected to the discharge outlet, which is either separate from or integral with the housing of the integrated pump unit. At least one of the suction-side pump connection element or the discharge-side pump connection element, along with the stop shaft, is arranged parallel to the assembly direction of the integrated pump unit on the bridge housing.

[0014] Pump connection elements arranged parallel to the assembly direction in both the suction-side and discharge-side pump connection elements are defined as specific pump connection elements. In this integrated pump unit mounting system, to avoid interference between the specific pump connection elements and the rotating body that rotates together with the stop shaft, the rotation range of the stop shaft is limited according to the configuration of the specific pump connection elements.

[0015] Therefore, in the integrated pump device mounting system disclosed herein, interference between the integrated pump device and the bridge housing connection elements can be effectively avoided, thereby improving mounting performance and miniaturizing the bridge housing. Attached Figure Description

[0016] The foregoing and other objects, features, and advantages of this disclosure will become more apparent with reference to the accompanying drawings and through the following detailed description. The accompanying drawings are as follows: Figure 1 This is a diagram showing the general layout of the connection elements of the integrated pump unit when mounted in the e-Axle housing.

[0017] Figure 2 This is a configuration diagram of a hydraulic system including an integrated pump device according to one embodiment.

[0018] Figure 3 This is an exploded perspective view showing the assembly operation of the integrated pump device of the first embodiment into the e-Axle housing.

[0019] Figure 4 This is an exploded perspective view showing the assembly operation of the integrated pump device of the second embodiment into the e-Axle housing.

[0020] Figure 5 This is an exploded perspective view showing the assembly operation of the integrated pump device of the third embodiment into the e-Axle housing.

[0021] Figure 6 This is a front view of the e-Axle housing according to the third embodiment.

[0022] Figure 7 yes Figure 6 Sectional view along line VII-VII.

[0023] Figure 8 It means in Figure 6 The diagram shows the state in which the integrated pump device is assembled in the e-Axle housing of the third embodiment in the VIII-VIII line section.

[0024] Figure 9 This diagram illustrates the definition of the first to fourth regions in the configuration of the coordinate division.

[0025] Figure 10 This is a diagram showing the limitation of the rotation range of the stop shaft in configuration example (1).

[0026] Figure 11 yes Figure 10 The view in the XI direction.

[0027] Figure 12 This is a diagram showing the limitation of the rotation range of the stop shaft in configuration example (2).

[0028] Figure 13 This is a diagram showing the limitation of the rotation range of the stop shaft in configuration example (3).

[0029] Figure 14 yes Figure 13The XIV direction view.

[0030] Figure 15 This is a diagram showing the limitation of the rotation range of the stop shaft in configuration example (4).

[0031] Figure 16 This is a diagram showing the limitation of the rotation range of the stop shaft in configuration example (5).

[0032] Figure 17 This is a diagram showing the limitation of the rotation range of the stop shaft in other configuration examples.

[0033] Figure 18 This is a configuration diagram of a hydraulic system that includes an integrated pump device with other implementations. Detailed Implementation

[0034] An embodiment of the integrated pump mounting system will be described based on the accompanying drawings. The integrated pump mounting system is a system in which an integrated pump device is mounted on the axle housing, which serves as the axle mechanism housing of a vehicle. In this embodiment, application to the e-Axle mechanism of electric vehicles is particularly envisioned, and the term "e-Axle housing" is used instead of the general term "axle housing." The integrated pump device, for example, activates the parking lock mechanism in an autonomous electric vehicle. Additionally, the integrated pump device supplies cooling or lubricating oil to MG (Motorcycle) and similar vehicles.

[0035] First, refer to Figure 1 , Figure 2 This section provides an overview of the integrated pump unit system. Figure 1 This shows a general layout of the connection elements that connect to the integrated pump unit 10 when mounted on the integrated pump unit 10 and the e-Axle housing 70. Figure 2 This describes the configuration of a hydraulic system including an integrated pump device 10 according to one embodiment.

[0036] The integrated pump unit 10 integrally comprises 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 generally cylindrical, and the pump unit 30 is generally cuboid. The motor unit 20, the pump unit 30, and the hydraulic actuator unit 60 are arranged in series. The motor rotation shaft M shared by the motor unit 20 and the pump unit 30 is arranged coaxially or parallel to the actuator rotation shaft O of the hydraulic actuator unit 60. Hereinafter, the actuator rotation shaft O will be abbreviated as "rotation shaft O".

[0037] Hereinafter, the direction of the rotation axis O will be referred to as the "axial direction", and the plane orthogonal to the axial direction will be referred to as the "axial orthogonal plane". The integrated pump unit 10 is assembled onto the e-Axle housing 70 along the axial direction from the motor part 20 side toward the hydraulic actuator part 60 side. This direction is defined as the "assembly direction". Figure 10This is equivalent to a projection of the axis orthogonal plane viewed in the direction opposite to the assembly direction. The hydraulic actuator section 60 has an axial end face opening with a suction port 67 and a discharge port 68. For the internal structure of the integrated pump unit 10, refer to... Figure 8 To be described later.

[0038] The pump unit 30 is an electric oil pump (EOP) that rotates under the driving force of the motor unit 20, and discharges oil drawn in from the suction port 67 to the discharge port 68. Specifically, oil is drawn in from a suction filter 92 or similar device located upstream of the oil circuit. In addition, in the integrated pump device 10 of one embodiment, the oil pressurized and delivered by the pump unit 30 is discharged via the hydraulic actuator unit 60 to an oil-consuming device 97 such as the MG or reducer located downstream of the oil circuit. This function is referred to as the "EOP function".

[0039] The hydraulic actuator unit 60 uses the working force generated by the hydraulic pressure supplied from the pump unit 30 to rotate the stop shaft 81 of the parking lock mechanism 80, thereby switching between the locking state and the locking-out state. This function is referred to as "PLA (Parking Lock Actuator) Function" or "PBW (Parking By-Wire) Function".

[0040] Components connected to the integrated pump unit 10 in association with the EOP function are called "EOP connection elements" and constitute part of the oil circuit in the hydraulic system. Among them, the element upstream of the oil circuit connected to the suction port 67 is called the "suction side pump connection element", and the element downstream of the oil circuit connected to the discharge port 68 is called the "discharge side pump connection element".

[0041] The suction-side pump connection element is, for example, the suction port connection pipe 927 protruding from the body of the suction filter 92. The body of the suction filter 92 is a flat cuboid extending along its length. Figure 1 In the specifications, the suction inlet connecting tube 927 protrudes from one end along the length of the main body. This is not limited to this; for example, ... Figures 13-15 As shown, there are also specifications that protrude upwards from the middle of the length direction. In this embodiment, only the suction inlet connecting pipe 927, which is directly connected to the integrated pump device 10 in the suction filter 92, will be described as a "suction-side pump connection element". The discharge-side pump connection element is, for example, the discharge outlet connecting pipe 688. In this embodiment, the discharge outlet connecting pipe 688 is separately provided from the housing of the integrated pump device 10.

[0042] Components connected to the integrated pump unit 10 in relation to PLA function are called "PLA connection elements". The stop shaft 81, as the first PLA connection element, is connected to the vane rotor 63 of the hydraulic actuator section 60 (see reference 1) on the rotating shaft O. Figure 8The hydraulic actuator section 60 is connected to the stop plate 82, which is a "rotating body" that rotates together with the stop shaft 81, and the parking lever 85, which reciprocates in conjunction with the rotation of the stop plate 82 (see reference). Figure 3 , Figure 10 (etc.) are also included in the PLA connection elements.

[0043] In the integrated pump assembly system of this embodiment, at least one of the suction-side pump connection element or the discharge-side pump connection element, and the stop shaft 81 are configured to be parallel to the assembly direction, i.e., parallel to the axial direction. Here, the parallel configuration of the stop shaft 81 relative to the assembly direction is also considered common technical knowledge. On the other hand, the EOP connection element does not necessarily have to be configured parallel to the axial direction; for example, it is functionally valid even if it is configured radially in the integrated pump assembly 10.

[0044] However, in this embodiment, considering the improvement of assemblability and mounting capability of the e-Axle housing 70, a configuration is adopted in which one or both of the suction-side pump connection element and the discharge-side pump connection element are arranged parallel to the assembly direction. Figure 1 In the example, the inlet connection pipe 927 and the outlet connection pipe 688 are arranged parallel to the assembly direction, but either one can be arranged in a direction different from the assembly direction.

[0045] Here, the EOP connection element, which is arranged parallel to the assembly direction in both the suction-side pump connection element and the discharge-side pump connection element, is defined as a "specific pump connection element". In summary, in the integrated pump device mounting system of this embodiment, the specific pump connection element and the stop shaft 81 are arranged parallel to the assembly direction.

[0046] By setting the assembly direction of a specific pump connection element and the stop shaft 81 in the assembly operation of the e-Axle housing 70 to the same direction, at least a portion of the EOP connection element and the PLA connection element can be "simultaneously connected". Furthermore, the definition of "simultaneously connected" refers to the same process, not the same time. By achieving simultaneous connection, assemblability and mounting performance are improved. In addition, the manufacturability of the e-Axle housing 70 is also improved.

[0047] Furthermore, in the integrated pump device mounting system of this embodiment, to avoid interference between a specific pump connection element and the stop plate 82, the rotation range of the stop shaft 81 is limited according to the configuration of the specific pump connection element. This effectively prevents interference between the connection elements. For details on avoiding interference, please refer to... Figures 9-17 To be described later.

[0048] [Implementation of e-Axle housing] Next, refer to Figures 3-8Several embodiments of the e-Axle housing 70, preferably selected for suitable simultaneous connection operations, will be described. In these embodiments, substantially identical components are labeled with the same reference numerals and descriptions are omitted. The symbol for the e-Axle housing in each embodiment is followed by the embodiment number in the third position after "70". Similarly, the reference numerals for mounting openings and protrusions are also followed by the embodiment number in the third position.

[0049] (First Implementation) Figure 3 The e-Axle housing 701 of the first embodiment shown has a mounting opening 721 formed on the inner side of the outer frame portion 71. During the assembly operation of the integrated pump device 10 into the e-Axle housing 701, the outlet connecting pipe 688 and the suction connecting pipe 927, which are specific pump connection elements, are inserted into the mounting opening 721 in the same direction as the stop shaft 81, and a part of the integrated pump device 10 is inserted into the mounting opening 721.

[0050] The suction inlet connecting pipe 927, serving as a connection element for the suction-side pump, is connected to the suction inlet 67 of the integrated pump unit 10. The discharge outlet connecting pipe 688, serving as a connection element for the discharge-side pump, is connected to the discharge outlet 68 of the integrated pump unit 10. The stop shaft 81, serving as a PLA connection element, together with the attached stop plate 82 and parking lever 85, is connected to the center portion of the housing of the integrated pump unit 10. Furthermore, regarding the cone 86 and the parking lock pawl 87, please refer to... Figure 10 As will be described later.

[0051] By forming a mounting opening 721 in the e-Axle housing 701, a portion of the integrated pump unit 10 can be embedded inside the e-Axle housing 701 during simultaneous connection operations of specific pump connection elements and PLA connection elements. (See details...) Figure 8 This will be described later. Therefore, it is possible to miniaturize the e-Axle housing 701 while maintaining high assemblability.

[0052] (Second Implementation) Figure 4 The e-Axle housing 702 of the second embodiment shown has the same configuration as the e-Axle housing 701 of the first embodiment, and also integrally provides a protrusion 732 that extends inward from the inner wall of the mounting opening 722. The protrusion 732 has a shaft support hole 74 for supporting the stop shaft 81 and an insertion hole 75 for inserting a specific pump connection element.

[0053] During the assembly of the integrated pump unit 10, there may be situations where the operator cannot visually inspect the interior of the e-Axle housing 702. By integrally providing a protrusion 732 with a shaft support hole 74 and an insertion hole 75, the positional deviation of the shaft support hole 74 and the insertion hole 75 relative to the positioning part is reduced. Therefore, even when the interior of the e-Axle housing 702 cannot be visually inspected, the reliability of the simultaneous connection of the stop shaft 81 and specific pump connection elements can be improved, thereby achieving high efficiency in the operation.

[0054] In the second embodiment, the protrusion 732 is formed into a generally triangular shape that ensures the minimum space required for the formation of the shaft support hole 74 and the insertion hole 75, and is arranged to extend downward from the upper inner wall of the mounting opening 722. Therefore, the weight of the e-Axle housing 702 can be reduced.

[0055] (Third Implementation) exist Figure 5 In the e-Axle housing 703 of the third embodiment shown, in addition to the configuration of the e-Axle housing 702 of the second embodiment, the protrusion 733 is connected to the inner wall of the mounting opening 723 by more than half the length of the inner periphery of the mounting opening 723. Approximately half of the mounting opening 723 is blocked by the protrusion 733, which can also be expressed as a "half-bag shape".

[0056] Figure 6 , Figure 7 This indicates the frontal shape of the e-Axle housing 703 and the center horizontal plane passing through the center O of the shaft support hole 74. Figure 6 The cross-sectional shape along line VII-VII. In the third embodiment, the protrusion 733 is connected to the entire inner wall of the mounting opening 722, which is above the center horizontal plane, and a portion of the inner wall below the center horizontal plane. In other words, the space between the lower edge of the protrusion 733 and the lower portion of the outer frame 71 becomes a substantial mounting opening 723. As a result, the rigidity of the e-Axle housing 703 is increased, and the reliability during connection operations is improved.

[0057] Figure 8 This represents a cross-section showing the state in which the integrated pump unit 10 is assembled in the e-Axle housing 703. A portion of the e-Axle housing 703 corresponds to... Figure 6 Section VIII-VIII. In Figure 8 The diagram shows an example where the insertion hole 75 is L-shaped, but it can also be straight. The outlet of the insertion hole 75 is connected to the fuel consuming device 97, such as the MG.

[0058] The internal structure of the integrated pump unit 10 will be briefly described. One end of the shaft 24 of the motor unit 20 is connected to the internal gear 321 of the pump gear 32 housed in the pump unit 30. By rotating the shaft 24, the internal gear 321 rotates inside the external gear 322, thereby supplying hydraulic pressure from the pump unit 30 to the blade housing 61 of the hydraulic actuator unit 60 via the pump plate 50.

[0059] By switching the hydraulic supply path according to the rotation direction of the pump section 30, the vane rotor 63 housed in the vane housing 61 rotates in both directions. Simultaneously, the stop shaft 81 connected to the central axis of the vane rotor 63 rotates in both directions. Furthermore, at a predetermined rotational position of the vane rotor 63, the oil passage to the discharge port 68 is opened, and oil drawn in from the suction port 67 is discharged from the discharge port 68.

[0060] The length of the integrated pump unit 10 inserted into the e-Axle housing 703 within its total shaft length Lt is denoted as the embedded length Li, and the remaining shaft length is denoted as the protruding length Lo. By making a portion of the total shaft length Lt the embedded length Li, the protruding length Lo is suppressed. Therefore, miniaturization of the e-Axle housing 703 in the state of mounting the integrated pump unit 10 is achieved.

[0061] Furthermore, by housing the pump plate 50 and the hydraulic actuator section 60 inside the e-Axle housing 703, even if oil leakage occurs, it remains inside the e-Axle housing 703, preventing leakage to the outside. Additionally, oil leakage from the pump section 30 to the motor section 20 is sealed by an oil seal 246 located in the middle of the shaft 24.

[0062] [Limitation of the rotation range of the stop shaft] Reference Figures 9-17 The limitations on the rotation range of the stop shaft 81 corresponding to the configuration of a specific pump connection element that is arranged parallel to the assembly direction in relation to the suction side pump connection element or the discharge side pump connection element are explained.

[0063] When the stop plate 82, acting as a "rotating body," operates within the axial range of the connecting element, interference may occur during its operation, depending on the configuration of the connecting element. However, if the orthogonal plane of the axis where the stop plate 82 operates is offset from the axial range of the connecting element to avoid interference, the axial volume of the e-Axle housing 70 increases. For example, in Figure 8 In the mounting configuration, the orthogonal plane of the working axis of the stop plate 82 deviates from the axial range of the outlet connecting pipe 688. Therefore, a mounting configuration is required that can effectively avoid interference between the connecting element and the stop plate 82 and reduce the axial volume of the e-Axle housing 70.

[0064] Reference Figure 9This describes the definition of the configuration area for each 90° interval in the configuration coordinate system. In this configuration coordinate system, in the direction opposite to the assembly direction ( Figure 1 Viewing the integrated pump unit 10 from the e-Axle housing 70 side in the IX direction, with the rotation center of the stop shaft 81 as the origin O. The rightward direction of the horizontal line passing through the origin O is set to 0°, and the angle increases counterclockwise. The direction of the horizontal line corresponds to the direction parallel to the road surface when mounted on the vehicle. Furthermore, the mark "O" serves as both a symbol for the rotation shaft and a symbol for the origin.

[0065] In this coordinate system configuration, four configuration regions are defined: 0°~90° as the first region, 90°~180° as the second region, 180°~270° as the third region, and 270°~360° as the fourth region. In the diagram, the first to fourth regions are represented by the symbols "I", "II", "III", and "IV", respectively.

[0066] Figures 10-15 Four configuration examples (1) to (4) are shown, in which a specific pump connection element is configured in any configuration area. Here, "configured in any configuration area" means that the overall shape of the specific pump connection element is contained within the configuration area in the orthogonal plane of the axis where the stop plate 82 is working. Figure 16 Example (5) shows a combined configuration where two specific pump connection elements are each configured in a configuration area. Additionally, in Figure 17 In the example, as another configuration example, an example is shown where a particular pump connection element is configured across two configuration areas.

[0067] The rotation range of the stop shaft 81 is limited such that the stop plate 82 operates within an angular range of 270°, encompassing the three configuration areas excluding the configuration area containing the specific pump connection element. Here, the shortest distance from the origin O to the outline of the specific pump connection element is defined as the critical radius Rc. "The stop plate 82 operates within the angular range" means that, in the radial region above the critical radius Rc, the entire outline of the stop plate 82 is contained within that angular range.

[0068] In addition, the point where the outer edge of the stop plate 82 intersects the virtual circle of the critical radius Rc is set as the critical intersection point Q, and the angle formed by the line connecting the origin O and the critical intersection point Q and the circumferential center line of the stop plate 82 is set as the allowance angle. The rotation range of the stop shaft 81 can be expressed as follows: "The rotation range of the stop shaft 81 is limited to the circumferential centerline of the stop plate 82 after removing the margin angle from both ends of the angular range that combines the three configuration areas excluding the configuration area for the specific pump connection element." (270-2) Rotate within an angle range of 0.5°. exist Figures 10-12 In the configuration examples (1) and (2) shown, the suction inlet connection pipe 927, which is a suction-side pump connection element, is set as a specific pump connection element to avoid interference. Considering the connection with the suction filter 92 located upstream of the oil line, the suction inlet 67 of the integrated pump unit 10 is located below the rotation axis O. Therefore, the suction inlet connection pipe 927 is configured in the third or fourth region. Here, as Figure 1 , Figure 11 As shown, the main body of the suction filter 92 is offset from the orthogonal plane of the working axis of the stop plate 82, so it does not interfere with the rotation range of the stop shaft 81. Therefore, only the suction inlet connecting pipe 927, whose axial range overlaps with the orthogonal plane of the working axis of the stop plate 82, is treated as the suction-side pump connection element to be avoided. The discharge outlet connecting pipe 688, which is the discharge-side pump connection element, is configured orthogonally to the assembly direction and is not equivalent to a specific pump connection element.

[0069] As the stop plate 82 rotates, the stop roller 84 passes over the peak and engages with either of the two valleys by the force of the stop spring 83, thereby switching between the P position (solid line in the figure) and the non-P position (double-dotted line in the figure). Typically, the rotation angle of the stop shaft 81 is applied to be less than 45°. In the example shown, the working angle θr of the stop shaft 81 is approximately 23°.

[0070] In the parking lock mechanism 80, the parking lever 85 reciprocates in the P direction and non-P direction due to the rotation of the stop plate 82. Consequently, the parking lock pawl 87, which abuts against the conical surface of the cone 86 on the parking lever 85, swings around its axis. When the parking lever 85 moves in the P direction, the protrusion of the parking lock pawl 87 engages with the parking gear 88, thus locking the mechanism. When the parking lever 85 moves in the non-P direction, the protrusion of the parking lock pawl 87 disengages from the parking gear 88, and the locking is released.

[0071] In configuration example (1), the inlet connecting pipe 927 is disposed in the third region. In this case, the rotation range of the stop shaft 81 is limited to the range within which the stop plate 82 operates, encompassing the fourth region, the first region, and the second region. In configuration example (2), the inlet connecting pipe 927 is disposed in the fourth region. In this case, the rotation range of the stop shaft 81 is limited to the range within which the stop plate 82 operates, encompassing the first region, the second region, and the third region. Thus, interference between the inlet connecting pipe 927 and the stop plate 82 can be effectively avoided, and the e-Axle housing 70 can be miniaturized.

[0072] exist Figures 13-15In the configuration examples (3) and (4) shown, the outlet connection pipe 688, which is a discharge-side pump connection element, is designated as a specific pump connection element to avoid interference. The outlet 68 of the integrated pump unit 10 is positioned above the rotation axis O, taking into account its connectivity with the oil cooler, MG, etc., located downstream of the oil circuit. Therefore, the outlet connection pipe 688 is configured in either the first or second region. The suction inlet connection pipe 927, which is a suction-side pump connection element, is configured orthogonally to the assembly direction and is not equivalent to a specific pump connection element.

[0073] In configuration example (3), the outlet connection pipe 688 is disposed in the first region. In this case, the rotation range of the stop shaft 81 is limited to the range within which the stop plate 82 operates, encompassing the second, third, and fourth regions. In configuration example (4), the outlet connection pipe 688 is disposed in the second region. In this case, the rotation range of the stop shaft 81 is limited to the range within which the stop plate 82 operates, encompassing the third, fourth, and first regions. Thus, interference between the outlet connection pipe 688 and the stop plate 82 can be effectively avoided, and the e-Axle housing 70 can be miniaturized.

[0074] Figure 16 The configuration example (5) shown is a configuration example that combines the components of the suction-side pump connection element of configuration example (1) and the discharge-side pump connection element of configuration example (4). Configuration example (5) is also similar to... Figure 1 Correspondingly, the suction inlet connection pipe 927 and the discharge outlet connection pipe 688 are specific pump connection elements arranged parallel to the assembly direction. The suction inlet connection pipe 927 is located in the third region, and the discharge outlet connection pipe 688 is located in the second region.

[0075] In this case, the rotation range of the stop shaft 81 is limited to the "range of the fourth region and the first region" shared by configuration example (1) and configuration example (4) ("range of the third region, the fourth region and the first region"), so that the stop plate 82 can operate. Similarly, in the configuration example that combines configuration examples (2) and configuration example (3), the rotation range of the stop shaft 81 is limited to the stop plate 82 operating within the "range of the second region and the third region".

[0076] In this way, when both the suction side pump connection element and the discharge side pump connection element are specific pump connection elements, interference between the EOP connection element and the stop plate 82 can be effectively avoided by combining the common allowable rotation range for each EOP connection element.

[0077] Reference Figure 17Other configuration examples will be described below. In this configuration example, the suction inlet connection pipe 927 is configured across the third and fourth regions, and the discharge outlet connection pipe 688 is configured across the first and second regions. In this case, it is generally manifested as "limiting the rotation range of the stop shaft according to the configuration of the specific pump connection elements to avoid interference between the specific pump connection elements (i.e., the suction inlet connection pipe 927 and the discharge outlet connection pipe 688) and the stop plate 82". Thus, the same effect as the configuration examples (1) to (5) described above can be obtained.

[0078] (Other implementation methods) (a) In the above embodiments, a system in which an integrated pump device is mounted on the e-Axle housing of an electric vehicle is particularly envisioned, but the mounting system of this disclosure can also be applied to hybrid electric vehicles or engine vehicles with an auxiliary battery that serves as a power source for the motor. In the case of axle mechanisms (power transmission mechanisms of axles) in vehicles other than electric vehicles, "e-Axle housing" is replaced by "axle housing" as a general term.

[0079] (b) Figure 18 Indicates including with Figure 2 The hydraulic system configuration of the integrated pump device in different embodiments. This embodiment of the integrated pump device is disclosed in International Publication No. 2022 / 130671. Oil discharged from the pump section 30 is discharged to oil-consuming devices 97 such as the MG and reducer via a supply oil passage branching off from the oil passage leading to the hydraulic actuator section 60. For example, by arranging the discharge port from the pump section 30 parallel to the assembly direction without passing through the interior of the vane housing 61, the same mounting configuration to the e-Axle housing 70 described above can be applied to the integrated pump device of this embodiment.

[0080] (c) In the above embodiment, the outlet connecting pipe 688, which is separately provided from the housing of the integrated pump device 10, is connected to the outlet 68 of the integrated pump device 10. In this configuration, for various e-Axle housings 70 with different sizes and shapes of connection holes, a common integrated pump device 10 can be assembled by changing the outlet connecting pipe used. However, if the connection hole of the mounted e-Axle housing 70 is determined to be one type, the outlet connecting pipe may also be integrally provided with the housing of the integrated pump device 10. In the integral configuration, the outlet connecting pipe is also regarded as a "discharge-side pump connection element" connected to the outlet 68 of the integrated pump device 10, referring to the description of the above embodiment.

[0081] (d) The connection element of the suction side pump is not limited to the suction inlet connection pipe 927, but can be any component upstream of the oil line that connects to the suction inlet 67. For example, relative to Figure 1 , Figure 11When the length of the suction inlet connecting pipe 927 is relatively short and the orthogonal plane of the working axis of the stop plate 82 is contained within 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 inlet connecting pipe 927, as a "suction-side pump connection element". The discharge-side pump connection element is not limited to the discharge outlet connecting pipe 688, but can be any component downstream of the oil passage connected to the discharge outlet 68.

[0082] The present disclosure is not limited to the above-described embodiments and can be implemented in various ways without departing from its spirit.

[0083] This disclosure has been described with reference to embodiments. However, this disclosure is not limited to these embodiments and constructions. This disclosure also includes various modifications and equivalent variations. In addition, various combinations and methods, as well as other combinations and methods that include only one element, more or fewer elements, also fall within the scope and spirit of this disclosure.

Claims

1. An integrated pump device mounting system, characterized in that, It has an integrated pump unit (10), which is mounted on the axle housing (70) of the vehicle and is integrally formed as follows: Motor section (20); The pump unit (30) rotates under the driving force of the motor unit and discharges the oil drawn in from the suction port (67) to the discharge port (68); as well as The rotary hydraulic actuator (60) switches between locked and unlocked states by rotating the stop shaft (81) of the parking lock mechanism (80) using hydraulic pressure supplied from the pump unit. A suction-side pump connection element (927, 92) is connected to the suction port. The outlet is connected to a discharge-side pump connection element (688) that is either separate from or integral with the housing of the integrated pump device. At least one of the suction-side pump connection element or the discharge-side pump connection element, and the stop shaft are arranged parallel to the assembly direction of the integrated pump assembly in the bridge housing. If the pump connection element arranged parallel to the assembly direction in the suction side pump connection element and the discharge side pump connection element is defined as a specific pump connection element, then the rotation range of the stop shaft is limited according to the configuration of the specific pump connection element to avoid interference between the specific pump connection element and the rotating body (82) that rotates together with the stop shaft.

2. The integrated pump device mounting system according to claim 1, characterized in that, When viewing the integrated pump device from the bridge housing side in the direction opposite to the assembly direction, in a coordinate system with the rotation center of the stop shaft as the origin and the rightward direction of the horizontal line passing through the origin as 0° and increasing counterclockwise, if we define four configuration regions: 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°... Then, one of the specific pump connection elements is configured in any one of the configuration areas. The rotation range of the stop shaft is limited such that the rotating body operates within the range of the three configuration areas combined, excluding the configuration area that configures the specific pump connection element.

3. The integrated pump device mounting system according to claim 2, characterized in that, The specific pump connection element is the suction-side pump connection element. The suction-side pump connection element is disposed in the third region, and the rotation range of the stop shaft is limited such that the rotating body operates within the range that combines the fourth region, the first region, and the second region, or... The suction-side pump connection element is disposed in the fourth region, and the rotation range of the stop shaft is limited such that the rotating body operates within the range that combines the first region, the second region, and the third region.

4. The integrated pump device mounting system according to claim 2, characterized in that, The specific pump connection element is the discharge-side pump connection element. The discharge-side pump connection element is configured in the first region, and the rotation range of the stop shaft is limited such that the rotating body operates within the range that combines the second region, the third region, and the fourth region, or... The discharge-side pump connection element is configured in the second region, and the rotation range of the stop shaft is limited such that the rotating body operates within the range that combines the third region, the fourth region, and the first region.

5. The integrated pump device mounting system according to any one of claims 1-4, characterized in that, The bridge housing (701-703) has mounting openings (721-723) for inserting the specific pump connection element in the same direction as the stop shaft and inserting a portion of the integrated pump assembly during the assembly operation of the integrated pump assembly.

6. The integrated pump device mounting system according to claim 5, characterized in that, The bridge housing (702, 703) is integrally provided with an extension (732, 733) extending inward from the inner wall of the mounting opening. The extension has a shaft support hole (74) for supporting the stop shaft and an insertion hole (75) for the specific pump connection element to be inserted.

7. The integrated pump device mounting system according to claim 6, characterized in that, The protrusion (733) of the bridge housing (703) is connected to the inner wall of the mounting opening by more than half the length of the inner periphery of the mounting opening.

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