Oil pump and parking actuator dual-mode mechanism

Abstract

The utility model provides an oil pump and parking actuator dual-mode mechanism which comprises a mounting shell, a motor assembly, an oil pump assembly, a plunger assembly and a parking assembly, and the mounting shell is provided with a first oil cavity and a second oil cavity; the plunger assembly comprises a connecting shell and a plunger, the connecting shell and the mounting shell are connected to form a cavity, the plunger comprises a plunger part and a connecting rod part, the connecting rod part is in linkage connection with the parking assembly, the plunger part is slidably connected into the cavity, and the connecting shell is provided with a first connecting oil cavity and a second connecting oil cavity. The first oil cavity communicates with the cavity located on the side, close to the mounting shell, of the plunger part to form a first oil way, and the second oil cavity, the first connecting oil cavity, the cavity located on the side, away from the mounting shell, of the plunger part and the second connecting oil cavity communicate in sequence to form a second oil way. The oil pump and the parking lock actuator are integrated, the structure is compact, the function of the oil pump and the function of the actuator can be switched only by changing the rotating direction of the motor assembly, and operation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy vehicles, and in particular to a dual-mode mechanism of an oil pump and a parking actuator. Background Art

[0002] With the development of new energy technologies in the automotive field, new energy vehicles have higher and higher requirements for motor power density, and oil-cooled motors account for an increasingly higher proportion of motor types in new energy vehicles. The use of oil-cooled motors usually requires an oil pump system. In addition, as national laws and regulations on automobile safety become increasingly perfect, parking locks are becoming an increasingly indispensable component in gearboxes.

[0003] At present, the opening and closing states of the oil pump system often require additional configuration of corresponding controllers to achieve control, and the locking and releasing states of the parking lock require additional configuration of drive motors and controllers to achieve control. The drive motors and controllers occupy a large space, have high manufacturing costs, and have relatively more parts, resulting in a relatively large overall size and weight of the gearbox, which is not conducive to the layout and lightweight design of the gearbox. In addition, the parking lock only needs to work when the vehicle is stopped, and the utilization rate of the drive motor and controller separately configured for the parking lock is relatively low. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a dual-mode mechanism of an oil pump and a parking actuator, aiming to solve the technical problems that the drive motor and controller configured for the oil pump system and the parking lock in the prior art occupy a large space, have a high manufacturing cost, and have relatively many parts, resulting in a relatively large overall volume and weight of the gearbox, which is not conducive to the layout and lightweight design of the gearbox, and the parking lock only needs to work when the vehicle is stopped, so the utilization rate of the drive motor and controller separately configured for the parking lock is low.

[0005] The utility model aims to provide a dual-mode mechanism of an oil pump and a parking actuator, comprising a mounting housing, a motor assembly arranged inside the mounting housing, an oil pump assembly connected to the motor assembly, a plunger assembly connected to the mounting housing, and a parking assembly linked to the plunger assembly, wherein the mounting housing is provided with a first oil chamber and a second oil chamber connected to the oil pump assembly, and the first oil chamber and the second oil chamber are independently arranged;

[0006] The plunger assembly comprises a connecting shell and a plunger, the connecting shell is connected with the mounting shell to form a cavity, the plunger comprises a plunger part and a connecting rod part connected to the plunger part, one end of the connecting rod part away from the plunger part passes through the connecting shell and is linked to the parking assembly, the plunger part is slidably connected in the cavity, and a first connecting oil chamber and a second connecting oil chamber are respectively provided on both sides of the end of the connecting shell away from the mounting shell, the first oil chamber is connected with the cavity located on a side of the plunger part close to the mounting shell to form a first oil circuit, and the second oil chamber, the first connecting oil chamber, the cavity located on a side of the plunger part away from the mounting shell, and the second connecting oil chamber are connected in sequence to form a second oil circuit;

[0007] The oil pressure of the first oil chamber and the second oil chamber is changed by controlling the rotation direction of the motor assembly to conduct the first oil circuit or the second oil circuit, so that the lubricating oil enters the cavity and pushes the plunger part to move axially along the cavity, so that the connecting rod part can drive the parking assembly to move synchronously to achieve parking locking or release.

[0008] Compared with the prior art, the beneficial effects of the dual-mode mechanism of an oil pump and a parking actuator of the utility model are: it realizes the integrated integration of the oil pump and the parking lock actuator, the structure is compact and simple, and the oil pump assembly and the parking assembly share a motor assembly, and the oil pump function and the actuator function can be switched only by changing the rotation direction of the motor assembly. The operation is convenient, and no additional controller is required to control the switching, which reduces the number of parts and the gearbox layout space, is conducive to the lightweight setting of the gearbox, and reduces the production cost. Specifically, a plurality of oil chambers are designed on the mounting shell and the connecting shell to form a first oil circuit and a second oil circuit for connecting the oil pump assembly and the cavity where the plunger is located. The oil pressure of the first oil chamber and the second oil chamber is changed by different rotation directions of the motor assembly to conduct the first oil circuit or the second oil circuit, so that the lubricating oil in the external oil pan can enter the top or bottom of the plunger part through the first oil circuit or the second oil circuit, pushing the plunger part to move axially along the cavity, and then driving the parking assembly to move synchronously to realize the parking lock or release function. In other words, the parking assembly is driven by hydraulics. Compared with the gear-driven parking lock actuator, it has a simpler structure, fewer parts, and is more stable and reliable to use.

[0009] In addition, the dual-mode mechanism of the oil pump and parking actuator according to the utility model may also have the following additional technical features:

[0010] Furthermore, a first one-way valve is provided at one end of the first oil chamber away from the oil pump assembly, and the first one-way valve is used to control the oil inlet of the second oil circuit. A second one-way valve is provided at one end of the second connecting oil chamber away from the cavity, and the second one-way valve is used to control the oil outlet of the second oil circuit. When the oil pressure of the first oil chamber is lower than the oil pressure of the second oil chamber, the first one-way valve is turned on, and the lubricating oil enters the oil pump assembly through the first one-way valve via the first oil chamber, and then flows out from the second oil chamber connected to the oil pump assembly, and enters the cavity through the second oil circuit, pushing the plunger part to move along the axial direction of the cavity toward the mounting shell, and the connecting rod part drives the parking assembly to move in the same direction to realize parking release. When the parking is completely released, the second one-way valve is turned on, and the lubricating oil in the cavity will be discharged from the second one-way valve to dissipate heat to external devices.

[0011] Furthermore, a third one-way valve is provided at one end of the second oil chamber away from the oil pump assembly, and the third one-way valve is used to control the oil inlet of the first oil circuit. A fourth one-way valve is provided at the connection between the first oil chamber and the cavity, and the fourth one-way valve is used to control the lubricating oil to enter the cavity located on the side of the plunger part close to the mounting shell. When the oil pressure of the first oil chamber is higher than the oil pressure of the second oil chamber, the third one-way valve and the fourth one-way valve are connected, and the lubricating oil enters the oil pump assembly through the third one-way valve via the second oil chamber, and then flows out from the first oil chamber connected to the oil pump assembly, and then passes through the fourth one-way valve and enters the cavity via the first oil circuit, pushing the plunger part to move along the axial direction of the cavity in a direction away from the mounting shell, so that the connecting rod part drives the parking assembly to move synchronously to realize the parking lock.

[0012] Furthermore, a third connecting oil chamber is provided at one end of the connecting shell close to the mounting shell, and the third connecting oil chamber is communicated with the cavity located on the side of the plunger part close to the mounting shell. A pressure relief valve is provided in the third connecting oil chamber, and the pressure relief valve is used to control the oil pressure in the cavity.

[0013] The camming mechanism is configured to enable the cam to move relative to the locking mechanism, and the locking mechanism comprises a locking cam which is configured to lock the locking mechanism and the locking cam of the vehicle. The camming mechanism comprises a locking cam which is configured to lock the locking mechanism. The camming mechanism comprises a locking cam which is configured to lock the vehicle. The locking cam is configured to lock the vehicle.

[0014] Furthermore, a limit block is provided on the parking push rod, and a parking spring is sleeved on the parking push rod located between the limit block and the conical block, the limit block is used to limit the axial movement of the parking spring, and one end of the parking spring away from the limit block is fixedly connected to the conical block.

[0015] Furthermore, the fixed end is provided with a positioning pin and a reset torsion spring connected to the positioning pin, and the reset torsion spring is used to drive the limiting protrusion to disengage from the tooth groove of the parking gear.

[0016] Furthermore, the dual-mode mechanism of the oil pump and the parking actuator also includes a stop assembly, which includes a stop plate and a positioning steel ball cooperating with the stop plate, the stop plate is fixedly connected to an end of the connecting rod portion away from the plunger portion, one end of the stop plate is provided with a slot, and the stop plate is clamped with an end of the parking push rod away from the conical block through the slot, and the other end of the stop plate is provided with a first positioning groove and a second positioning groove adapted to the positioning steel ball.

[0017] Furthermore, the dual-mode mechanism of the oil pump and the parking actuator also includes a detection component, and the detection component includes a position sensor and a magnet matched with the position sensor, and the magnet is fixed to one side of the stop plate.

[0018] Further, the motor assembly includes a motor housing and a motor disposed in the motor housing, and the motor housing is fixedly connected to the mounting housing;

[0019] The oil pump assembly includes an oil pump housing, a cycloid outer rotor disposed in the oil pump housing, and a cycloid inner rotor meshingly connected to the cycloid outer rotor. The oil pump housing is fixed in the mounting housing, and the cycloid inner rotor is meshingly connected to the output shaft of the motor via a spline. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural diagram of the oil pump and parking actuator dual-mode mechanism of the utility model at a first viewing angle;

[0021] Figure 2 It is a three-dimensional structural diagram of the oil pump and parking actuator dual-mode mechanism of the utility model at a second viewing angle;

[0022] Figure 3 It is a three-dimensional structural diagram of the oil pump and parking actuator dual-mode mechanism of the utility model from a third viewing angle;

[0023] Figure 4 for Figure 3 A magnified view of the structure at B in the middle;

[0024] Figure 5 It is a three-dimensional structural diagram of the dual-mode mechanism of the oil pump and the parking actuator of the utility model without the parking component;

[0025] Figure 6 for Figure 5 A schematic diagram of the structure in a certain viewing angle;

[0026] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure at AA in the middle;

[0027] Figure 8 This is a working principle diagram of the oil pump and parking actuator dual-mode mechanism of the utility model when it functions as an oil pump;

[0028] Fig. 9 This is a working principle diagram of the oil pump and parking actuator dual-mode mechanism of the utility model when it functions as a parking actuator.

[0029] The above drawings include the following reference numerals: 1-installation housing; 11-tube shell portion; 12-seat body portion; 101-first oil chamber; 102-second oil chamber; 2-motor assembly; 21-motor housing; 22-motor; 3-oil pump assembly; 31-oil pump housing; 32-cycloid outer rotor; 33-cycloid inner rotor; 4-plunger assembly; 41-connecting housing; 42-plunger; 421-plunger portion; 422-connecting rod portion; 401-first connecting oil chamber; 402-second connecting oil chamber; 403-third connecting oil chamber; 404-cavity; 51-first one-way valve; 52-second connecting oil chamber; 53-third connecting oil chamber; 54-cavity; 55-first one-way valve; 56-first one-way valve; 57-first one-way valve; 58-first one-way valve; 59-first one-way valve; 60-second one-way valve; 61-second one-way valve; 62-second one-way valve; 63-second one-way valve; 64-second one-way valve; 65-second one-way valve; 66-second one-way valve; 67-second one-way valve; 68-second one-way valve; 69-second one-way valve; 70-second one-way valve; 71-second one-way valve; 72-second one-way valve; 73-second one-way valve; 74-second one-way valve; 75-second one-way valve 2-second one-way valve; 53-third one-way valve; 54-fourth one-way valve; 55-pressure relief valve; 6-stop assembly; 61-stop plate; 601-first positioning groove; 602-second positioning groove; 603-card slot; 62-positioning steel ball; 7-parking assembly; 71-parking push rod; 72-conical block; 73-parking arm; 731-limiting protrusion; 74-parking base; 75-parking gear; 76-parking spring; 77-locating pin; 78-reset torsion spring; 8-detection assembly; 81-position sensor; 82-magnet; a-first oil circuit; b-second oil circuit.

[0030] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] See also Figures 1 to 7The oil pump and parking actuator dual-mode mechanism of the utility model includes a mounting shell 1, a motor assembly 2 arranged inside the mounting shell 1, an oil pump assembly 3 connected to the motor assembly 2, a plunger assembly 4 connected to the mounting shell 1, and a parking assembly 7 linked to the plunger assembly 4. The mounting shell 1 is provided with a first oil chamber 101 and a second oil chamber 102 connected to the oil pump assembly 3, and the first oil chamber 101 and the second oil chamber 102 are independently arranged.

[0035] As an example, the mounting housing 1 includes a tube shell portion 11 and a seat body portion 12 disposed at one end of the tube shell portion 11. The tube shell portion 11 and the seat body portion 12 are connected to form a storage space for accommodating the motor assembly 2 and the oil pump assembly 3. The motor assembly 2 is disposed at one end of the tube shell portion 11 away from the seat body portion 12, and the oil pump assembly 3 is fixed on the seat body portion 12. Specifically, the motor assembly 2 is used to provide a rotational driving force, and includes a motor housing 21 and a motor 22 disposed inside the motor housing 21. The motor housing 21 is fastened to the end of the tube shell portion 11 away from the seat body portion 12 by bolts, and the output shaft of the motor 22 passes through the motor housing 21 and is connected to the oil pump assembly 3. It should be noted that the motor 22 in this embodiment uses a low-power motor, which can save the motor cost.

[0036] In this embodiment, the oil pump assembly 3 is a cycloidal gear pump, which includes an oil pump housing 31, a cycloidal outer rotor 32 disposed in the oil pump housing 31, and a cycloidal inner rotor 33 meshingly connected to the cycloidal outer rotor 32. The oil pump housing 31 is fixedly connected to the seat body 12 by bolts, and the cycloidal inner rotor 33 is meshingly connected to the output shaft of the motor 22 by splines, so that the motor 22 can drive the oil pump assembly 3 to rotate in the same direction.

[0037] Further, the end of the seat body 12 close to the tube shell 11 is provided with a first oil chamber 101 and a second oil chamber 102, and one end of the first oil chamber 101 and the second oil chamber 102 are respectively connected to the internal space of the oil pump housing 31, and the ends of the first oil chamber 101 and the second oil chamber 102 away from the oil pump housing 31 are respectively connected to the outside of the seat body 12. As a specific example, in this embodiment, the cross-sections of the first oil chamber 101 and the second oil chamber 102 are both L-shaped channels. It should be noted that the first oil chamber 101 and the second oil chamber 102 can be used as both an oil suction chamber and an oil outlet chamber. In this embodiment, when the motor 22 rotates clockwise, the first oil chamber 101 is an oil suction chamber and the second oil chamber 102 is an oil outlet chamber; when the motor 22 rotates counterclockwise, the second oil chamber 102 is an oil suction chamber and the first oil chamber 101 is an oil outlet chamber.

[0038] As an example, the plunger assembly 4 includes a connecting shell 41 and a plunger 42. The connecting shell 41 is connected to the mounting shell 1 to form a cavity 404. Specifically, the connecting shell 41 is fixedly connected to one end of the seat body 12 away from the tube shell part 11 by bolts, and the cavity 404 is formed between the connecting shell 41 and the end surface of the seat body 12. The plunger 42 is slidably connected in the cavity 404. The plunger 42 includes a plunger part 421 and a connecting rod part 422 connected to the plunger part 421. The circumferential outer wall of the plunger part 421 is slidably connected to the circumferential inner wall of the cavity 404. The end of the connecting rod part 422 away from the plunger part 421 passes through the connecting shell 41 and is linked to the parking assembly 6.

[0039] Furthermore, the first oil chamber 101 on the seat body 12 is connected to the cavity 404 located on the side of the plunger portion 421 close to the mounting shell 1, that is, the top end of the cavity 404, to form a first oil circuit a. During actual use, the lubricating oil that enters the cavity 404 through the first oil circuit a is located above the plunger portion 421, which can push the plunger portion 421 to move downward.

[0040] A first connecting oil chamber 401 and a second connecting oil chamber 402 are respectively provided on both sides of an end of the connecting shell 41 away from the mounting shell 1. Specifically, a first connecting oil chamber 401 and a second connecting oil chamber 402 are respectively provided on both sides of the bottom end of the cavity 404. One side of the bottom end of the cavity 404 is connected with the second oil chamber 102 in the seat body 12 through the first connecting oil chamber 401, and the other side of the bottom end of the cavity 404 is connected with the outside of the connecting shell 41 through the second connecting oil chamber 402. The second oil chamber 102, the first connecting oil chamber 401, the cavity 404 located on the side of the plunger part 421 away from the mounting shell 1, that is, the bottom end of the cavity 404, and the second connecting oil chamber 402 are connected in sequence to form a second oil circuit b. In actual use, the lubricating oil entering the cavity 404 through the second oil circuit b is located below the plunger part 421, which can push the plunger part 421 to move upward.

[0041] Furthermore, in order to better control the conduction and closing of the first oil circuit a and the second oil circuit b, a one-way valve structure is provided on each of the two oil circuits. Specifically, a first one-way valve 51 is provided at one end of the first oil chamber 101 away from the oil pump assembly 3, and the first one-way valve 51 is used to control the oil inlet of the second oil circuit b, and a second one-way valve 52 is provided at one end of the second connecting oil chamber 402 away from the cavity 404, and the second one-way valve 52 is used to control the oil outlet of the second oil circuit b. It should be noted that the valve core end of the first one-way valve 51 is arranged toward the outside of the seat body 12, and is connected to the oil pan through the external oil circuit, and the spring end of the first one-way valve 51 is arranged toward the inside of the first oil chamber 101 and is connected to the first oil chamber 101; the valve core end of the second one-way valve 52 is arranged toward the inside of the cavity 404 and is connected to the cavity 404, and the spring end of the second one-way valve 52 is arranged toward the outside of the connecting housing 41.

[0042] A third one-way valve 53 is provided at one end of the second oil chamber 102 away from the oil pump assembly 3. The third one-way valve 53 is used to control the oil inlet of the first oil circuit a. A fourth one-way valve 54 is provided at the connection point between the second oil chamber 102 and the top of the cavity 404. The fourth one-way valve 54 is used to control the lubricating oil to enter the cavity 404 located on the side of the plunger 421 close to the mounting housing 1, that is, located above the plunger 421. It should be noted that the valve core end of the third one-way valve 53 is arranged toward the outside of the seat body 12 and is connected to the oil pan through the external oil circuit, and the spring end of the third one-way valve 53 is arranged toward the inside of the second oil chamber 102 and is connected to the second oil chamber 102; the valve core end of the fourth one-way valve 54 is arranged toward the inside of the second oil chamber 102 and is connected to the second oil chamber 102, and the spring end of the fourth one-way valve 54 is arranged toward the inside of the cavity 404 and is connected to the cavity 404.

[0043] Furthermore, in order to prevent the internal structure of the connecting shell 41 from being damaged due to excessive oil pressure at the top of the cavity 404 connected to the first oil chamber 101, a pressure relief valve 55 is provided on the connecting shell 41. Specifically, a third connecting oil chamber 403 is provided at one end of the connecting shell 41 close to the mounting shell 1. The third connecting oil chamber 403 is connected to the cavity 404 located on the side of the plunger portion 421 close to the mounting shell 1, that is, the top of the cavity 404. A pressure relief valve 55 is provided in the third connecting oil chamber 403. The pressure relief valve 55 is used to control the oil pressure in the top area of ​​the cavity 404. When the oil pressure reaches a certain threshold, it will automatically open to perform a pressure relief operation.

[0044] As an example, the parking assembly 7 includes a parking push rod 71, a conical block 72 slidably connected to the parking push rod 71, a parking arm 73 arranged on the side of the conical block 72 away from the parking push rod 71, a parking base 74, and a parking gear 75. The parking push rod 71 is linked to the connecting rod portion 422, and a limit block is provided on the parking push rod 71. A parking spring 76 is sleeved on the parking push rod 71 located between the limit block and the conical block 72, and the limit block is used to limit the axial movement of the parking spring 76. Specifically, the parking push rod 71 includes a clamping portion and a push rod portion connected to the clamping portion, the clamping portion is clamped in the clamping groove 603 of the stop plate 61, a limit block is provided at one end of the push rod portion close to the clamping portion, and the end of the push rod portion away from the clamping portion is slidably connected to the conical block 72, a sliding groove adapted to the push rod portion is provided in the conical block 72, the rod body of the push rod portion located between the conical block 72 and the clamping portion is sleeved with the parking spring 76, the end of the parking spring 76 close to the limit block is limited by the limit block, and the end of the parking spring 76 away from the limit block is fixedly connected to the end of the conical block 72.

[0045] In actual use, when the plunger portion 421 moves in the direction away from the mounting housing 1 along the axial direction of the cavity 404, the connecting rod portion 422 will drive the stopper 61 to move synchronously, pushing the parking push rod 71 to move in the direction away from the mounting housing 1, and the limit block on the parking push rod 71 compresses the parking spring 76. Since the end of the parking push rod 71 away from the limit block is slidably arranged inside the conical block 72, when one end of the parking spring 76 is subjected to force, it will push the conical block 72 disposed at the other end of the parking spring 76 to move in the direction away from the parking push rod 71. It should be understood that the sliding connection design between the parking push rod 71 and the conical block 72 and the design of the parking spring 76 can avoid rigid connection and reduce mechanical vibration and noise, wherein the parking spring 76 can play a buffering role, ensuring that the conical block 72 moves slowly, and avoiding the conical block 72 being directly subjected to force and causing impact on the parking arm 73 in its moving direction.

[0046] Furthermore, a guide hole is provided on one end surface of the parking base 74, and the parking base 74 can be fixed on the gearbox housing. The parking arm 73 includes a fixed end and a movable end, and a positioning pin 77 and a reset torsion spring 78 are provided on the fixed end. The positioning pin 77 can be fixed on the gearbox housing, and the fixed end is rotatably connected to the positioning pin 77. One end of the reset torsion spring 78 is fixed to the positioning pin 77, and the other end of the reset torsion spring 78 is connected to the movable end. The movable end is located on the side close to the conical block 72 in the axial direction of the guide hole, and one side of the movable end is in contact with the end surface of the parking base 74, and the other side of the movable end is provided with a limiting protrusion 731 adapted to the tooth groove of the parking gear 75. When the parking push rod 71 moves away from the mounting housing 1, that is, moves toward the direction of the guide hole, driven by the connecting rod 422, the conical surface of the conical block 72 will abut against the movable end, and drive the movable end to rotate in the direction of the parking gear 75 with the fixed end as the rotation center. In this process, the reset torsion spring 78 generates a reverse rebound force on the parking arm 73, and when the limiting protrusion 731 on the movable end is engaged in the tooth groove of the parking gear 75, the parking lock can be realized. When the conical block 72 is reset, the movable end of the parking arm 73 is no longer pushed by the conical block 72, and the rebound force of the reset torsion spring 78 will drive the limiting protrusion 731 on the movable end to disengage from the tooth groove of the parking gear 75, so that the parking arm 73 is reset, and then the parking is released.

[0047] As an example, the dual-mode mechanism of the oil pump and the parking actuator in the utility model also includes a stop assembly, which includes a stop plate 61 and a positioning steel ball 62 that cooperates with the stop plate 61. The stop plate 61 is fixedly connected to the end of the connecting rod portion 422 away from the plunger portion 421. A slot 603 is provided at one end of the stop plate 61. The stop plate 61 is engaged with the engaging portion of the parking push rod 71 through the slot 603, thereby realizing the linkage connection between the connecting rod portion 422 and the parking push rod 71. The other end of the stop plate 61 is provided with a first positioning groove 601 and a second positioning groove 602 that are adapted to the positioning steel ball 62. The first positioning groove 601 is provided on the side of the stop plate 61 close to the connecting shell 41, and the second positioning groove 602 is provided on the side of the stop plate 61 away from the connecting shell 41. The positioning steel ball 62 can be fixed on the gearbox housing, and includes a mounting seat, a spring portion disposed in the mounting seat, and a steel ball portion connected to the spring portion. When the spring portion is in a natural state, the steel ball portion is disposed at one end of the mounting seat. In addition, the stopper 61 is also slidably connected to the end surface of the connecting housing 41 away from the mounting housing 1 through a sliding bearing.

[0048] When the vehicle is in the parking lock state, the conical surface of the conical block 72 in the parking assembly 7 is in abutment with the movable end of the parking arm 73. Since the return torsion spring 78 in the parking assembly 7 generates a rebound force on the movable end to drive it to reset, the conical block 72 will be correspondingly subjected to a force that can drive it away from the parking arm 73, so that the stop plate 61 has a movement tendency to move toward the connection shell 41. In this case, the cooperation design of the steel ball part in the positioning steel ball 62 being stuck in the first positioning groove 601 will limit the stop plate 61 to prevent the stop plate 61 from moving up. In this way, after the vehicle is in the parking lock state, the motor 22 can stop working, and the purpose of maintaining the parking lock state can be achieved only by the cooperation of the positioning steel ball 62 and the first positioning groove 601 on the stop plate 61.

[0049] When the vehicle starts to release the parking state, the connecting rod part 422 will drive the stop plate 61 to move in the direction close to the connecting shell 41, so that the conical block 72 moves away from the parking arm 73. At this time, the steel ball part of the positioning steel ball 62 stuck in the first positioning groove 601 will be forced to retract into the cavity of the mounting seat part until the second positioning groove 602 moves to the position of the steel ball part. The steel ball part enters the second positioning groove 602 under the action of the rebound force of the spring part to limit the stop plate 61 and avoid the stop plate 61 from moving downward due to the gravity of the parking push rod 71 and the conical block 72, thereby achieving the purpose of maintaining the parking release state.

[0050] As an example, the dual-mode mechanism of the oil pump and the parking actuator in the utility model also includes a detection component 8, which includes a position sensor 81 and a magnet 82 that cooperates with the position sensor 81. The position sensor 81 can be fixed on the transmission housing, and the magnet 82 is fixed on one side of the stop plate 61, so that the position sensor 81 can detect the position of the stop plate 61, so that the control of the dual-mode mechanism of the oil pump and the parking actuator in the utility model can achieve a closed loop, thereby improving the performance of the overall device.

[0051] During actual use, the working principle of the dual-mode mechanism of the oil pump and the parking actuator of the utility model is: by controlling the rotation direction of the motor 22 in the motor assembly 2, the oil pump assembly 3 is driven to rotate in the same direction, and the oil pressure of the first oil chamber 101 and the second oil chamber 102 connected to the oil pump assembly 3 is changed to conduct the first oil circuit a or the second oil circuit b, so that the lubricating oil in the oil pan enters the top or bottom end of the cavity 404 through the first oil circuit a or the second oil circuit b, and pushes the plunger part 421 to move axially along the cavity 404, so that the connecting rod part 422 can drive the parking assembly 7 to move synchronously to realize parking locking or releasing.

[0052] As a specific example, in this embodiment, if Figure 8 As shown, when the motor 22 rotates clockwise, the motor 22 drives the oil pump assembly 3 to rotate clockwise. At this time, the first oil chamber 101 as a low-pressure chamber is an oil suction chamber, and the second oil chamber 102 as a high-pressure chamber is an oil discharge chamber. In other words, when the oil pressure of the first oil chamber 101 is lower than the oil pressure of the second oil chamber 102, the lubricating oil is sucked into the oil pump assembly 3 through the first oil chamber 101, and then flows out from the second oil chamber 102 connected to the oil pump assembly 3. Specifically, the first one-way valve 51 is in the conducting state, and the third one-way valve 53 and the fourth one-way valve 54 are in the conducting state. When the valve 54 is in the closed state, the lubricating oil in the oil pan will enter the oil pump assembly 3 through the first one-way valve 51 and the first oil chamber 101, and then flow out from the second oil chamber 102 connected to the oil pump assembly 3, and enter the cavity 404 from one side of the bottom end of the cavity 404 through the second oil path b, pushing the plunger part 421 to move along the axial direction of the cavity 404 toward the mounting housing 1, and the connecting rod part 422 will drive the parking push rod 71 to move in the same direction, so that the conical block 72 is away from the parking arm 73, and the purpose of parking release is achieved. After the parking state of the vehicle is released, the second one-way valve 52 is turned on, and the lubricating oil in the cavity 404 will enter the second connecting oil chamber 402 from the other side of the bottom end of the cavity 404, and finally be discharged from the second one-way valve 52, which can cool and dissipate heat for external devices such as motors or other structural devices that need heat dissipation. In this case, the oil pump and parking actuator dual-mode mechanism of the utility model realizes the function of cooling the lubricating oil pump and can be used as an oil pump.

[0053] As a specific example, in this embodiment, if Fig. 9As shown, when the motor 22 rotates counterclockwise, the motor 22 drives the oil pump assembly 3 to rotate counterclockwise. At this time, the second oil chamber 102 as a low-pressure chamber is an oil suction chamber, and the first oil chamber 101 as a high-pressure chamber is an oil outlet chamber. In other words, when the oil pressure of the first oil chamber 101 is higher than the oil pressure of the second oil chamber 102, the lubricating oil is sucked into the oil pump assembly 3 through the second oil chamber 102, and then flows out from the first oil chamber 101 connected to the oil pump assembly 3. Specifically, the first one-way valve 51 and the second one-way valve 52 are in a closed state, and the third one-way valve 53 and the fourth one-way valve 54 are in a conducting state. The lubricating oil in the oil pan will enter the oil pump assembly 3 through the third one-way valve 53 via the second oil chamber 102, and then After flowing out from the first oil chamber 101 connected to the oil pump assembly 3, it passes through the fourth one-way valve 54 and enters the interior of the cavity 404 from the top of the cavity 404 via the first oil passage a, pushing the plunger portion 421 to move along the axial direction of the cavity 404 in the direction away from the mounting housing 1, and the connecting rod portion 422 drives the parking push rod 71 to move in the same direction, so that the conical block 72 abuts against the movable end of the parking arm 73, and drives the movable end to rotate toward the parking gear 75, so that the limiting protrusion 731 on the movable end is stuck in the tooth groove of the parking gear 75, thereby achieving the purpose of parking lock. In this case, the dual-mode mechanism of the oil pump and the parking actuator of the utility model realizes the actuator function and can be used as a parking lock actuator.

[0054] In summary, the beneficial effects of the dual-mode mechanism of the oil pump and the parking actuator of the utility model are: the oil pump and the parking lock actuator are integrated, the structure is compact and simple, and the oil pump assembly and the parking assembly share a motor assembly, and the oil pump function and the actuator function can be switched only by changing the rotation direction of the motor assembly, which is convenient to operate, and no additional controller is required to control the switching, which reduces the number of parts and reduces the production cost. Specifically, by designing a plurality of oil chambers on the mounting shell and the connecting shell to connect the first oil circuit and the second oil circuit for connecting the oil pump assembly and the cavity where the plunger is located, the oil pressure of the first oil chamber and the second oil chamber is changed by the different rotation directions of the motor assembly to conduct the first oil circuit or the second oil circuit, so that the lubricating oil of the external oil pan can enter the upper or lower part of the plunger through the first oil circuit or the second oil circuit, and push the plunger to move along the axial direction of the cavity, thereby driving the parking assembly to move synchronously to realize the parking lock or release function, that is, the parking assembly is driven by hydraulic pressure, and compared with the gear-driven parking lock actuator, the structure is simpler, the parts are fewer, and the use is more stable and reliable.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A dual-mode mechanism of an oil pump and a parking actuator, characterized in that: The invention comprises a mounting housing, a motor assembly arranged inside the mounting housing, an oil pump assembly connected to the motor assembly, a plunger assembly connected to the mounting housing, and a parking assembly linked to the plunger assembly, wherein the mounting housing is provided with a first oil chamber and a second oil chamber communicated with the oil pump assembly, and the first oil chamber and the second oil chamber are independently arranged; The plunger assembly comprises a connecting shell and a plunger, the connecting shell is connected with the mounting shell to form a cavity, the plunger comprises a plunger part and a connecting rod part connected to the plunger part, one end of the connecting rod part away from the plunger part passes through the connecting shell and is linked to the parking assembly, the plunger part is slidably connected in the cavity, and a first connecting oil chamber and a second connecting oil chamber are respectively provided on both sides of the end of the connecting shell away from the mounting shell, the first oil chamber is connected with the cavity located on a side of the plunger part close to the mounting shell to form a first oil circuit, and the second oil chamber, the first connecting oil chamber, the cavity located on a side of the plunger part away from the mounting shell, and the second connecting oil chamber are connected in sequence to form a second oil circuit; By controlling the rotation direction of the motor assembly, the oil pump assembly is driven to rotate in the same direction, and the oil pressure of the first oil chamber and the second oil chamber is changed to conduct the first oil circuit or the second oil circuit. The lubricating oil enters the cavity through the first oil circuit or the second oil circuit, pushing the plunger part to move axially along the cavity, so that the connecting rod part can drive the parking assembly to move synchronously to achieve parking lock or release.

2. The dual-mode mechanism of the oil pump and parking actuator according to claim 1, characterized in that: A first one-way valve is provided at one end of the first oil chamber away from the oil pump assembly, the first one-way valve is used to control the oil inlet of the second oil circuit, and a second one-way valve is provided at one end of the second connecting oil chamber away from the cavity, the second one-way valve is used to control the oil outlet of the second oil circuit. When the oil pressure in the first oil chamber is lower than the oil pressure in the second oil chamber, the first one-way valve is turned on, the lubricating oil enters the oil pump assembly through the first one-way valve via the first oil chamber, and then flows out from the second oil chamber connected to the oil pump assembly, and enters the cavity through the second oil circuit, pushing the plunger part to move along the axial direction of the cavity toward the mounting shell, and the connecting rod part drives the parking assembly to move in the same direction to realize parking release. When the parking is completely released, the second one-way valve is turned on, and the lubricating oil in the cavity will be discharged from the second one-way valve to dissipate heat to external devices.

3. The dual-mode mechanism of the oil pump and parking actuator according to claim 1, characterized in that: A third one-way valve is provided at one end of the second oil chamber away from the oil pump assembly, and the third one-way valve is used to control the oil inlet of the first oil circuit. A fourth one-way valve is provided at the connection between the first oil chamber and the cavity, and the fourth one-way valve is used to control the lubricating oil to enter the cavity located on the side of the plunger part close to the mounting shell. When the oil pressure in the first oil chamber is higher than the oil pressure in the second oil chamber, the third one-way valve and the fourth one-way valve are connected, and the lubricating oil enters the oil pump assembly through the third one-way valve via the second oil chamber, and then flows out from the first oil chamber connected to the oil pump assembly, and then passes through the fourth one-way valve and enters the cavity via the first oil circuit, pushing the plunger part to move along the axial direction of the cavity in a direction away from the mounting shell, so that the connecting rod part drives the parking assembly to move synchronously to realize the parking lock.

4. The dual-mode mechanism of the oil pump and the parking actuator according to claim 1, characterized in that: A third connecting oil chamber is provided at one end of the connecting shell close to the mounting shell, and the third connecting oil chamber is communicated with the cavity located on the side of the plunger part close to the mounting shell. A pressure relief valve is provided in the third connecting oil chamber, and the pressure relief valve is used to control the oil pressure in the cavity.

5. The dual-mode mechanism of the oil pump and the parking actuator according to claim 1, characterized in that: The camming mechanism is a kind of mechanism that is used for the car to move freely in the vehicle and to control the movement of the vehicle body so that the camming mechanism can be effectively prevented from moving.

6. The dual-mode mechanism of the oil pump and parking actuator according to claim 5, characterized in that: A limit block is provided on the parking push rod, and a parking spring is sleeved on the parking push rod located between the limit block and the conical block. The limit block is used to limit the axial movement of the parking spring, and one end of the parking spring away from the limit block is fixedly connected to the conical block.

7. The dual-mode mechanism of the oil pump and the parking actuator according to claim 5, characterized in that: The fixed end is provided with a positioning pin and a reset torsion spring connected to the positioning pin, and the reset torsion spring is used to drive the limiting protrusion to disengage from the tooth groove of the parking gear.

8. The dual-mode mechanism of the oil pump and the parking actuator according to claim 5, characterized in that: The dual-mode mechanism of the oil pump and the parking actuator also includes a stop assembly, which includes a stop plate and a positioning steel ball that cooperates with the stop plate, the stop plate is fixedly connected to the end of the connecting rod portion away from the plunger portion, one end of the stop plate is provided with a slot, and the stop plate is clamped with the end of the parking push rod away from the conical block through the slot, and the other end of the stop plate is provided with a first positioning groove and a second positioning groove that are adapted to the positioning steel ball.

9. The dual-mode mechanism of the oil pump and parking actuator according to claim 8, characterized in that: The dual-mode mechanism of the oil pump and the parking actuator also includes a detection component, which includes a position sensor and a magnet matched with the position sensor, and the magnet is fixed to one side of the stop plate.

10. The dual-mode mechanism of oil pump and parking actuator according to claim 1, characterized in that: The motor assembly comprises a motor housing and a motor arranged in the motor housing, wherein the motor housing is fixedly connected to the mounting housing; The oil pump assembly includes an oil pump housing, a cycloid outer rotor disposed in the oil pump housing, and a cycloid inner rotor meshingly connected to the cycloid outer rotor. The oil pump housing is fixed in the mounting housing, and the cycloid inner rotor is meshingly connected to the output shaft of the motor via a spline.

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