CN116906546A - Transmission lubricating oil pump and transmission shell structure thereof - Google Patents

Abstract

The application relates to a transmission lubricating oil pump and a transmission shell structure thereof. The transmission lubrication pump includes a drive shaft, a port plate, and a reversing assembly. The reversing assembly comprises a reversing disc and a limiting piece, the valve plate and the reversing disc are connected to the driving shaft, a first valve and a second valve are arranged on the valve plate, the reversing disc comprises a first reversing channel and a second reversing channel, when the driving shaft rotates positively, the first reversing channel, the first valve and the first oil suction port are communicated with the low-pressure oil cavity, and the second reversing channel, the second valve and the first oil discharge port are communicated with the high-pressure oil cavity; when the driving shaft rotates reversely, the second reversing channel, the second distributing port and the first oil suction port are communicated with the low-pressure oil cavity, and the first reversing channel, the first distributing port and the first oil discharge port are communicated with the high-pressure oil cavity. Under the working conditions of forward rotation and reverse rotation of the driving shaft, an oil inlet oil way and an oil outlet oil way of the transmission lubricating oil pump are unchanged.

Description

Transmission lubricating oil pump and transmission shell structure thereof

Technical Field

The application relates to the technical field of mechanical lubrication, in particular to a transmission lubricating oil pump and a transmission shell structure thereof.

Background

For a traditional vehicle, the driving gear of the transmission lubricating oil pump does not have a reversing working condition, so that the oil inlet oil way and the oil outlet oil way of the transmission lubricating oil pump are kept unchanged under the forward rotating condition, however, for a transmission in a new energy automobile, the driving gear of the transmission lubricating oil pump has the reversing working condition because a motor can be reversed, and the oil inlet oil way and the oil outlet oil way of the transmission lubricating oil pump are changed under the reversing working condition, so that the transmission lubricating oil pump cannot work.

Disclosure of Invention

Based on this, it is necessary to provide a transmission lubricant pump and a transmission housing structure thereof, which address the problem of the change of the oil inlet and outlet passages of the transmission lubricant pump under the reverse rotation condition.

A transmission lubricant pump, the transmission lubricant pump comprising:

a drive shaft;

the valve plate is fixedly connected to the driving shaft, a first valve opening and a second valve opening are formed in the valve plate, the driving shaft rotates positively, the first valve opening is communicated with a low-pressure oil cavity of the transmission lubricating oil pump, and the second valve opening is communicated with a high-pressure oil cavity of the transmission lubricating oil pump; the driving shaft is reversed, the first distributing port is communicated with the high-pressure oil cavity, and the second distributing port is communicated with the low-pressure oil cavity;

the reversing assembly comprises a reversing disc and a limiting piece, the reversing disc is connected to the driving shaft, and the reversing disc comprises a first reversing channel and a second reversing channel; the first reversing channel is provided with a first reversing groove and a first reversing hole communicated with the first reversing groove, and the first reversing groove is communicated with the first distributing port; the second reversing channel is provided with a second reversing groove and a second reversing hole communicated with the second reversing groove, and the second reversing groove is communicated with the second distributing port;

the limiting piece is used for limiting the rotation range of the reversing disc when the driving shaft rotates positively or reversely, and limiting the reversing disc when the driving shaft rotates positively, so that the first reversing hole is communicated with a first oil suction port of the transmission lubricating oil pump, and the second reversing hole is communicated with a first oil discharge port of the transmission lubricating oil pump; when the driving shaft rotates reversely, the limiting piece limits the reversing disc, so that the second reversing hole is communicated with the first oil suction port, and the first reversing hole is communicated with the first oil discharge port.

In one embodiment, the transmission lubrication pump further comprises an oil pump rear housing, which together with the port plate forms a cavity provided with the reversing assembly; the oil pump rear shell is provided with the first oil suction port and the first oil discharge port.

In one embodiment, the oil pump rear shell is provided with a first oil suction duct, a first oil discharge duct, a second oil suction port and a second oil discharge port; the second oil suction port and the second oil discharge port are arranged at the lower end of the oil pump rear shell, and the first oil suction port and the first oil discharge port are arranged at the upper end of the oil pump rear shell; the first oil suction port is communicated with the second oil suction port through the first oil suction duct, and the first oil discharge port is communicated with the second oil discharge port through the first oil discharge duct.

In one embodiment, the limiting member is arranged and mounted on a shell of the oil pump rear shell opposite to the reversing disc.

In one embodiment, the transmission lubricating oil pump further comprises an oil cavity assembly, the oil cavity assembly is connected to the driving shaft, the low-pressure oil cavity and the high-pressure oil cavity are arranged in the oil cavity assembly, and when the driving shaft is switched between forward rotation and reverse rotation, the positions of the low-pressure oil cavity and the high-pressure oil cavity in the oil cavity assembly are driven to be switched.

In one embodiment, the oil cavity assembly comprises an oil pump front shell, a stator and a rotor, wherein the oil pump front shell and the valve plate jointly form an oil cavity, the stator and the rotor are arranged in the oil cavity, the rotor is connected with the driving shaft, the rotor is driven by the driving shaft, the rotor is meshed with the stator, and the low-pressure oil cavity and the high-pressure oil cavity are formed through meshing rotation of the stator and the rotor.

In one embodiment, the reversing assembly comprises a friction ring, the reversing disc is connected to the driving shaft through the friction ring, the reversing disc is not relatively rotated between the friction ring and the driving shaft before being limited by the limiting piece, the reversing disc is driven to rotate by the driving shaft, the reversing disc is relatively rotated between the friction ring and the driving shaft after being limited by the limiting piece, and the reversing disc is not driven to rotate by the driving shaft.

In one embodiment, the transmission lube pump further includes a drive gear coupled to the drive shaft, the drive gear engaging a counter gear coupled within the transmission.

The application also provides a transmission shell structure which is used for installing the transmission lubricating oil pump, so that the transmission lubricating oil pump is arranged in a transmission; the transmission shell structure is provided with an oil pump interface and a driving shaft hole, the oil pump interface is used for being connected with a transmission lubricating oil pump, and the driving shaft hole is used for being connected with the driving shaft.

In one embodiment, the transmission housing structure is provided with a second oil suction passage and a second oil discharge passage, the second oil suction passage is configured to form an oil suction passage together with the first oil suction passage, and the second oil discharge passage is configured to form an oil discharge passage together with the first oil discharge passage.

Through the technical scheme, when the driving shaft rotates positively, the first reversing channel is communicated with the first oil suction port and the first distributing port of the transmission lubricating oil pump, the first distributing port is communicated with the low-pressure oil cavity, the second reversing channel is communicated with the first oil discharge port and the second distributing port of the transmission lubricating oil pump, the second distributing port is communicated with the high-pressure oil cavity, and the paths of lubricating oil are sequentially the first oil suction port, the low-pressure oil cavity, the high-pressure oil cavity and the first oil discharge port; when the driving shaft rotates reversely, the second reversing channel is communicated with the first oil suction port and the second distributing port of the transmission lubricating oil pump, the second distributing port is communicated with the low-pressure oil cavity, the first reversing channel is communicated with the first oil discharge port and the first distributing port of the transmission lubricating oil pump, the first distributing port is communicated with the high-pressure oil cavity, and the paths of lubricating oil are sequentially the first oil suction port, the low-pressure oil cavity, the high-pressure oil cavity and the first oil discharge port under the reversing action of the reversing disc no matter whether the driving shaft rotates normally or reversely.

Drawings

FIG. 1 is a schematic diagram of a transmission lubricant pump and a transmission housing structure according to an embodiment of the present application.

Fig. 2 is a schematic view of a valve plate of an embodiment of a transmission lubricant pump and a transmission housing structure according to the present application.

Fig. 3 is a schematic diagram of a reversing disc of an embodiment of a transmission lubricant pump and transmission housing structure according to the present application.

Fig. 4 is a schematic view of a rear oil pump housing structure of an embodiment of a transmission lubrication pump of the present application.

FIG. 5 is a schematic diagram of a transmission housing of an embodiment of a transmission lubricant pump and transmission housing structure according to the present application.

FIG. 6 is a schematic diagram of a transmission lubricant pump according to an embodiment of the present application and a transmission housing structure thereof.

Fig. 7 is a sectional view A-A of fig. 6 when the driving shaft is rotated forward.

Fig. 8 is a B-B sectional view of fig. 6 when the driving shaft is rotated forward.

Fig. 9 is a C-C cross-sectional view of fig. 6 when the drive shaft is rotated in a forward direction.

Fig. 10 is a sectional view A-A of fig. 6 when the driving shaft is rotated forward.

Fig. 11 is a B-B sectional view of fig. 6 when the drive shaft is rotated forward.

Fig. 12 is a C-C cross-sectional view of fig. 6 when the drive shaft is rotated in a forward direction.

Component reference numerals in the drawings illustrate:

1000. a transmission lubrication pump; 100. a drive shaft; 200. a port plate; 300. a reversing assembly; 400. an oil pump rear case; 500. front shell of oil pump; 600. a drive gear; 2000. a transmission housing structure; 210. a first distribution port; 220. a second distribution port; 310. a reversing disc; 320. a friction ring; 330. a limiting piece; 410. a first oil suction port; 420. a first oil drain port; 430. a first oil suction passage; 440. a first oil drain passage; 450. a second oil suction port; 460. a second oil drain port; 510. a stator; 520. a rotor; 2001. an oil pump interface; 2002. a drive shaft hole; 2003. the second oil suction duct; 2004. a second oil drain passage; 311. a first commutation channel; 312. a second commutation channel; 313. a stopper rail; 311a, a first reversing groove; 311b, a first reversing hole; 312a, a second reversing groove; 312b, second reversing hole.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Referring to fig. 1 and 6, fig. 1 is a schematic diagram of a transmission lubricant pump 1000 and a transmission housing structure 2000 thereof according to the present application, and fig. 6 is a schematic diagram of a transmission lubricant pump 1000 according to the present application. The application provides a transmission lubricating oil pump 1000 which is used for being installed on a transmission shell structure 2000, so that the transmission lubricating oil pump 1000 can be internally arranged in a transmission, the risk of oil leakage is effectively reduced, the external space of the transmission is saved, the overall size of the transmission is reduced, and the structure of a transmission lubricating system is optimized.

The transmission lubricating oil pump 1000 includes an oil chamber assembly connected to the driving shaft 100, wherein the oil chamber assembly includes a low-pressure oil chamber and a high-pressure oil chamber, and when the driving shaft 100 is switched between forward rotation and reverse rotation, the positions of the low-pressure oil chamber and the high-pressure oil chamber in the oil chamber assembly are driven to be exchanged.

The transmission lube pump 1000 also includes a drive shaft 100, a port plate 200, and a reversing assembly 300. Referring to fig. 2, fig. 2 is a schematic diagram of a valve plate 200 of a transmission lubrication pump 1000 according to the present application. The port plate 200 is fixedly connected to the drive shaft 100. The valve plate 200 and the driving shaft 100 may be fixedly connected by other elements such as a bidirectional bearing, so that the valve plate 200 is not driven by the driving shaft 100, which is not limited herein. The valve plate 200 is provided with a first valve 210 and a second valve 220, the driving shaft 100 rotates forward, the first valve 210 is communicated with a low-pressure oil cavity of the transmission lubricating oil pump 1000, and the second valve 220 is communicated with a high-pressure oil cavity of the transmission lubricating oil pump 1000; the drive shaft 100 is reversed, the first port 210 is in communication with the high pressure chamber, and the second port 220 is in communication with the low pressure chamber.

The reversing assembly 300 includes a reversing disc 310 and a limiter 330. Referring to fig. 3, fig. 3 is a schematic diagram of a reversing disc 310 of an embodiment of a transmission lubricant pump 1000 and a transmission housing structure 2000 according to the present application. The reversing disc 310 is connected to the drive shaft 100, the reversing disc 310 including a first reversing channel 311 and a second reversing channel 312; the first reversing channel 311 has a first reversing groove 311a and a first reversing hole 311b communicated with the first reversing groove 311a, and the first reversing groove 311a is communicated with the first distributing port 210; the second diverting passage 312 has a second diverting groove 312a and a second diverting hole 312b communicating with the second diverting groove 312a, the second diverting groove 312a communicating with the second distributing port 220.

The limiting piece 330 is used for limiting the rotation range of the reversing disc 310 when the driving shaft 100 rotates forward or rotates backward, and the limiting piece 330 limits the reversing disc 310 when the driving shaft 100 rotates forward, so that the first reversing hole 311b is communicated with the first oil suction port 410 of the transmission lubricating oil pump 1000, and the second reversing hole 312b is communicated with the first oil discharge port 420 of the transmission lubricating oil pump 1000; when the driving shaft 100 rotates reversely, the limiting member 330 limits the reversing disc 310, so that the second reversing hole 312b is communicated with the first oil suction port 410, and the first reversing hole 311b is communicated with the first oil discharge port 420.

Through the above technical solution, when the driving shaft 100 rotates forward, the first reversing channel 311 is communicated with the first oil suction port 410 and the first distributing port 210 of the transmission lubricating oil pump 1000, the first distributing port 210 is communicated with the low-pressure oil cavity, the second reversing channel 312 is communicated with the first oil discharge port 420 and the second distributing port 220 of the transmission lubricating oil pump 1000, the second distributing port 220 is communicated with the high-pressure oil cavity, and the paths of the lubricating oil are sequentially the first oil suction port 410, the low-pressure oil cavity, the high-pressure oil cavity and the first oil discharge port 420; when the driving shaft 100 rotates reversely, the second reversing channel 312 is communicated with the first oil suction port 410 and the second distributing port 220 of the transmission lubricating oil pump 1000, the second distributing port 220 is communicated with the low-pressure oil cavity, the first reversing channel 311 is communicated with the first oil discharge port 420 and the first distributing port 210 of the transmission lubricating oil pump 1000, the first distributing port 210 is communicated with the high-pressure oil cavity, and the paths of the lubricating oil are sequentially the first oil suction port 410, the low-pressure oil cavity, the high-pressure oil cavity and the first oil discharge port 420 under the reversing action of the reversing disc 310 no matter the driving shaft 100 rotates normally or rotates reversely.

The reversing assembly 300 comprises a friction ring 320, a reversing disc 310 is connected to the driving shaft 100 through the friction ring 320, the reversing disc 310 is not relatively rotated between the friction ring 320 and the driving shaft 100 before being limited by a limiting piece 330, the reversing disc 310 is driven to rotate by the driving shaft 100, the reversing disc 310 is relatively rotated between the friction ring 320 and the driving shaft 100 after being limited by the limiting piece 330, and the reversing disc 310 is not driven to rotate by the driving shaft 100.

Specifically, the oil chamber assembly includes an oil pump front case 500, a stator 510, and a rotor 520, the oil pump front case 500 and the port plate 200 together form an oil chamber, the stator 510 and the rotor 520 are built in the oil chamber, the rotor 520 is connected to the driving shaft 100, the rotor 520 is driven by the driving shaft 100, the rotor 520 is engaged with the stator 510, and a low pressure oil chamber and a high pressure oil chamber are formed by the engaged rotation of the stator 510 and the rotor 520.

Referring to fig. 4, the transmission lubrication pump 1000 further includes an oil pump rear housing 400, where the oil pump rear housing 400 and the port plate 200 together form a cavity provided with the reversing assembly 300, and the oil pump rear housing 400 is provided with a first oil suction port 410 and a first oil discharge port 420. The oil pump rear case 400 is provided with a first oil suction duct 430, a first oil discharge duct 440, a second oil suction port 450 and a second oil discharge port 460; the second oil suction port 450 and the second oil discharge port 460 are provided at the lower end of the oil pump rear case 400, and the first oil suction port 410 and the first oil discharge port 420 are provided at the upper end of the oil pump rear case 400; the first oil suction port 410 is communicated with the second oil suction port 450 through a first oil suction duct 430, and the first oil discharge port 420 is communicated with the second oil discharge port 460 through a first oil discharge duct 440.

The stopper 330 may be mounted on the port plate 200 or the oil pump rear housing 400 to limit the steering wheel 310, which is not particularly limited herein. Illustratively, the limiter 330 is disposed on a housing of the oil pump rear housing 400 opposite the reversing disc 310.

Referring to FIG. 5, FIG. 5 is a schematic diagram of a transmission housing structure 2000 in accordance with the present application. The present application also proposes a transmission housing structure 2000, and the transmission housing structure 2000 is used to install the transmission lubricant pump 1000 described above, so that the transmission lubricant pump 1000 is built into a transmission. The transmission case structure 2000 is provided with a second oil suction passage 2003 and a second oil discharge passage 2004, the second oil suction passage 2003 being for forming an oil suction passage together with the first oil suction passage 430, the second oil discharge passage 2004 being for forming an oil discharge passage together with the first oil discharge passage 440. So set up, transmission lubricating oil pump 1000 and transmission housing structure 2000 share the oil duct, not only reduced the installation of the oil feed oil duct of transmission lubricating oil pump 1000 and the oil absorption oil duct in the derailleur and arranged the degree of difficulty, still made oil feed oil duct and oil absorption oil duct along the longitudinal arrangement of transmission housing structure 2000, effectively reduced the axial dimension of transmission lubricating oil pump 1000.

Referring to fig. 5, a transmission housing structure 2000 is provided with an oil pump interface 2001 for connecting the transmission lubricant pump 1000 and a drive shaft hole 2002 for connecting the drive shaft 100. The arrangement positions of the oil pump interface 2001 and the drive shaft hole 2002 may be determined according to practical applications, and are not particularly limited herein. Preferably, the oil pump interface 2001 is arranged at the bottom oil pan of the transmission housing structure 2000, so that the space at the bottom oil pan of the transmission housing structure 2000 is larger, the transmission lubricating oil pump 1000 is arranged and mounted, and the difficulty in mounting and arranging lubricating parts such as filtering and oil pipes of the transmission lubricating oil pump 1000 is effectively reduced.

Referring to fig. 6, the transmission lubrication pump 1000 further includes a driving gear 600, the driving gear 600 is connected to the driving shaft 100, and the driving gear 600 is engaged with a constant rotation gear connected in the transmission. The driving gear 600 is driven to rotate by the constant rotation gear, and the driving shaft 100 is driven to rotate by the driving gear 600.

Further, referring to fig. 9 and 12, fig. 9 is a cross-sectional view of the transmission lubricant pump 1000 in the forward direction, and fig. 12 is a cross-sectional view of the transmission lubricant pump 1000 in the reverse direction. The reversing disc 310 is provided with a limiting rail 313, the limiting rail 313 having a first end for limiting the reversing disc 310 in forward rotation and a second end for limiting the reversing disc 310 in reverse rotation. When the reversing disc 310 rotates, the limiting piece 330 slides in the limiting rail 313 until abutting against the first end or the second end. The limiting member 330 may be other limiting members 330 such as a roller, a slider, etc., and is not specifically limited herein. Illustratively, the limiter 330 is a stop pin.

Referring to fig. 7-9, fig. 7-9 are cross-sectional views of sections A-A, B-B, C-C, respectively, of the transmission lubricant pump 1000 during forward rotation, illustrating the principles of operation of the transmission lubricant pump 1000 during forward rotation. When the driving shaft 100 is driven by the driving gear 600 to be in a forward rotation working condition, the driving shaft 100 drives the reversing disc 310 to rotate through the friction ring 320 until the limiting pin is abutted against the first end of the limiting rail 313, and at this time, the first oil suction port 410, the first reversing hole 311b, the first reversing groove 311a and the first distributing port 210 are communicated with the low-pressure oil cavity; the first oil drain 420, the second reversing hole 312b, the second reversing groove 312a, and the second distributing port 220 are communicated with the high-pressure oil chamber. The paths of the lubricating oil are as follows: the transmission oil pan- > the second oil suction port 450- > the first oil suction port 430 and the second oil suction port 2003- > the first oil suction port 410- > the first reversing hole 311 b- > the first reversing groove 311 a- > the first distributing port 210- > the low pressure oil chamber- > the high pressure oil chamber- > the second distributing port 220- > the second reversing groove 312 a- > the second reversing hole 312 b- > the first oil drain port 420- > the first oil drain port 440 and the second oil drain port 2004- > the second oil drain port 460.

Referring to fig. 10-12, fig. 10-12 are cross-sectional views of sections A-A, B-B, C-C, respectively, of a reverse rotation of transmission lubricant pump 1000, illustrating the principle of operation of transmission lubricant pump 1000 in a reverse rotation condition. When the driving shaft 100 is driven by the driving gear 600 to be in the reverse rotation condition, the driving shaft 100 drives the reversing disc 310 to rotate through the friction ring 320 until the limiting pin abuts against the second end of the limiting rail 313, at this time, the first oil suction port 410, the second reversing hole 312b, the second reversing groove 312a and the second distributing port 220 are communicated with the low-pressure oil cavity, and the first oil discharge port 420, the first reversing hole 311b, the first reversing groove 311a and the first distributing port 210 are communicated with the high-pressure oil cavity. The paths of the lubricating oil are as follows: the transmission oil pan- > the second oil suction port 450- > the first oil suction port 430 and the second oil suction port 2003- > the first oil suction port 410- > the second reversing hole 312 b- > the second reversing groove 312 a- > the second distributing port 220- > the low pressure oil chamber- > the high pressure oil chamber- > the first distributing port 210- > the first reversing groove 311 a- > the first reversing hole 311 b- > the first oil drain port 420- > the first oil drain port 440 and the second oil drain port 2004- > the second oil drain port 460. So configured, the path of the lubricating oil is from the low pressure oil chamber to the high pressure oil chamber in the normal rotation condition or the reverse rotation condition of the driving shaft 100, and the oil inlet path and the oil outlet path of the lubricating oil remain unchanged.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A transmission lubricant pump, comprising:

a drive shaft;

the valve plate is fixedly connected to the driving shaft, a first valve opening and a second valve opening are formed in the valve plate, the driving shaft rotates positively, the first valve opening is communicated with a low-pressure oil cavity of the transmission lubricating oil pump, and the second valve opening is communicated with a high-pressure oil cavity of the transmission lubricating oil pump; the driving shaft is reversed, the first distributing port is communicated with the high-pressure oil cavity, and the second distributing port is communicated with the low-pressure oil cavity;

the reversing assembly comprises a reversing disc and a limiting piece, the reversing disc is connected to the driving shaft, and the reversing disc comprises a first reversing channel and a second reversing channel; the first reversing channel is provided with a first reversing groove and a first reversing hole communicated with the first reversing groove, and the first reversing groove is communicated with the first distributing port; the second reversing channel is provided with a second reversing groove and a second reversing hole communicated with the second reversing groove, and the second reversing groove is communicated with the second distributing port;

the limiting piece is used for limiting the rotation range of the reversing disc when the driving shaft rotates positively or reversely, and limiting the reversing disc when the driving shaft rotates positively, so that the first reversing hole is communicated with a first oil suction port of the transmission lubricating oil pump, and the second reversing hole is communicated with a first oil discharge port of the transmission lubricating oil pump; when the driving shaft rotates reversely, the limiting piece limits the reversing disc, so that the second reversing hole is communicated with the first oil suction port, and the first reversing hole is communicated with the first oil discharge port.

2. The transmission lubricant pump of claim 1, further comprising an oil pump rear housing that cooperates with the port plate to form a cavity in which the reversing assembly is disposed; the oil pump rear shell is provided with the first oil suction port and the first oil discharge port.

3. The transmission lubrication pump according to claim 2, wherein the oil pump rear housing is provided with a first oil suction passage, a first oil discharge passage, a second oil suction port and a second oil discharge port; the second oil suction port and the second oil discharge port are arranged at the lower end of the oil pump rear shell, and the first oil suction port and the first oil discharge port are arranged at the upper end of the oil pump rear shell; the first oil suction port is communicated with the second oil suction port through the first oil suction duct, and the first oil discharge port is communicated with the second oil discharge port through the first oil discharge duct.

4. A transmission lubricant pump as claimed in claim 3, wherein the stop is provided on a housing of the pump rear housing opposite the reversing disc.

5. The transmission lubricant pump of claim 3, further comprising an oil chamber assembly connected to the drive shaft, the oil chamber assembly including the low pressure oil chamber and the high pressure oil chamber therein, the drive shaft driving the low pressure oil chamber and the high pressure oil chamber in the oil chamber assembly in a position-to-position relationship when switching between forward rotation and reverse rotation.

6. The transmission lubricant pump according to claim 5, wherein the oil chamber assembly includes an oil pump front case, a stator, and a rotor, the oil pump front case and the port plate together forming an oil chamber, the stator and the rotor being built in the oil chamber, the rotor being connected to the drive shaft, the rotor being driven by the drive shaft, the rotor being engaged with the stator, the low-pressure oil chamber and the high-pressure oil chamber being formed by engagement rotation of the stator and the rotor.

7. A transmission lubricant pump according to claim 3, wherein the reversing assembly comprises a friction ring, the reversing disc is connected to the drive shaft by the friction ring, there is no relative rotation between the friction ring and the drive shaft before being limited by the limiting member, the reversing disc is driven to rotate by the drive shaft, there is relative rotation between the friction ring and the drive shaft after being limited by the limiting member, and the reversing disc is not driven to rotate by the drive shaft.

8. The transmission lubricant pump of claim 3, further comprising a drive gear coupled to the drive shaft, the drive gear engaging a constant-speed gear coupled within the transmission.

9. A transmission housing structure for mounting the transmission lubricant pump according to any one of claims 3 to 8 such that the transmission lubricant pump is built in a transmission; the transmission shell structure is provided with an oil pump interface and a driving shaft hole, the oil pump interface is used for being connected with a transmission lubricating oil pump, and the driving shaft hole is used for being connected with the driving shaft.

10. The transmission housing structure according to claim 9, wherein the transmission housing structure is provided with a second oil suction passage for forming an oil suction passage together with the first oil suction passage and a second oil discharge passage for forming an oil discharge passage together with the first oil discharge passage.