CN110529217B

CN110529217B - Oil pump driving device, engine and vehicle

Info

Publication number: CN110529217B
Application number: CN201810517624.9A
Authority: CN
Inventors: 张文德
Original assignee: Borgward Automotive China Co Ltd
Current assignee: Borgward Automotive China Co Ltd
Priority date: 2018-05-25
Filing date: 2018-05-25
Publication date: 2021-07-20
Anticipated expiration: 2038-05-25
Also published as: CN110529217A

Abstract

The utility model relates to an oil pump drive arrangement, engine and vehicle, this oil pump drive arrangement includes engine oil pump shaft and drive shaft, the engine oil pump shaft passes through drive mechanism and connects in the drive shaft, drive mechanism includes first drive mechanism and second drive mechanism, the drive ratio of first drive mechanism is different with the drive ratio of second drive mechanism, drive arrangement still includes the controlled piece, receive the controlled piece motion through the control and can optionally make oil pump drive arrangement have first operating condition and second operating condition, at first operating condition, the drive shaft passes through first drive mechanism and drives the engine oil pump shaft, at second operating condition, the drive shaft passes through second drive mechanism and drives the engine oil pump shaft. By the technical scheme, the oil pump driving device can realize the switching of different transmission ratios, so that the rotating speed and the oil discharge capacity of the oil pump can be adjusted according to the working condition of an engine, and the aims of reducing the power loss of the oil pump and avoiding the waste of the oil are fulfilled.

Description

Oil pump driving device, engine and vehicle

Technical Field

The present disclosure relates to the field of engine technology, and in particular, to an oil pump driving device, an engine using the oil pump driving device, and a vehicle using the engine.

Background

Along with the development mode of high energy consumption economy and extensive type, the environmental problem is more and more prominent, and 60% -70% of the existing vehicles belong to high energy consumption and high pollution emission vehicles, and the total amount of fuel oil and engine oil consumed each year accounts for more than half of the annual output of finished oil in China, so in order to accelerate the construction of resource-saving society, energy conservation and emission reduction become one of the important subjects of the automobile industry. Because the engine is the heart of the automobile, how to improve the efficiency of the engine and reduce the power and energy loss is one of effective means for realizing energy conservation and emission reduction.

The oil pump is one of components in an engine and is used for pumping oil to moving surfaces of various parts of the engine so as to ensure the normal operation of the various parts of the engine. Currently, most of oil pumps are driven by a crankshaft or a balance shaft, and the displacement of the oil pump is in direct proportion to the rotating speed of the crankshaft or the balance shaft, that is, the higher the engine rotating speed is, the larger the displacement of the oil pump is, and the larger the supply amount of oil is. In order to make the supply of the engine oil meet the requirement of the engine in low-speed operation, the engine oil pump is often designed to be large, so that the supply of the engine oil is larger than the amount of the engine oil actually required by each part of the engine in high-speed operation or stable operation of the engine, and the power loss and the waste of the engine oil pump are caused. In the existing engine, only one-stage transmission exists between a crankshaft or a balance shaft and an engine oil pump, and the transmission ratio cannot be changed, so that the rotating speed of an engine oil pump shaft and the discharge capacity of the engine oil pump cannot be adaptively adjusted according to the rotating speed and the overall working condition of the engine, and the waste of engine oil cannot be avoided.

Disclosure of Invention

The purpose of the present disclosure is to provide an oil pump driving device, an engine using the oil pump driving device, and a vehicle using the engine, wherein the oil pump driving device can adjust the rotation speed and the oil discharge capacity of an oil pump according to the working condition of the engine, so as to achieve the purposes of reducing the power loss of the oil pump and avoiding the oil waste.

In order to achieve the above object, the present disclosure provides an oil pump driving device, including an oil pump shaft and a driving shaft, where the oil pump shaft is connected to the driving shaft through a transmission mechanism, the transmission mechanism includes a first transmission mechanism and a second transmission mechanism, a transmission ratio of the first transmission mechanism is different from a transmission ratio of the second transmission mechanism, the oil pump driving device further includes a controlled element, and the controlled element is controlled to move so as to selectively enable the oil pump driving device to have a first working state and a second working state, where in the first working state, the driving shaft drives the oil pump shaft through the first transmission mechanism, and in the second working state, the driving shaft drives the oil pump shaft through the second transmission mechanism.

Optionally, the controlled member is axially movably and circumferentially lockingly mounted on the drive shaft or the oil pump shaft, the first transmission mechanism is bidirectionally idly mounted between the drive shaft and the oil pump shaft by a first mounting structure, the second transmission mechanism is unidirectionally idly mounted between the drive shaft and the oil pump shaft by a second mounting structure, in the first operating state, the controlled member is engaged with the first transmission mechanism so that the drive shaft drives the oil pump shaft by the first transmission mechanism, the second transmission mechanism is idly rotated relative to the drive shaft and the oil pump shaft by the second mounting structure, in the second operating state, the controlled member is disengaged from the first transmission mechanism, and the first transmission mechanism is idly rotated relative to the drive shaft and the oil pump shaft by the first mounting structure, the driving shaft drives the engine oil pump shaft through the second transmission mechanism.

Optionally, the transmission ratio of the first transmission mechanism is greater than that of the second transmission mechanism, the first transmission mechanism includes a first transmission member and a second transmission member that are in transmission connection with each other, the second transmission mechanism includes a third transmission member and a fourth transmission member that are in transmission connection with each other, the first mounting structure includes a bearing, the second mounting structure includes an overrunning clutch, wherein,

the controlled part is mounted on the engine oil pump shaft and is adjacent to the second transmission part, the first transmission part is fixedly mounted on the driving shaft, the second transmission part is mounted on the engine oil pump shaft through the bearing, the third transmission part is fixedly mounted on the driving shaft, the fourth transmission part is mounted on the engine oil pump shaft through the overrunning clutch, in the first working state, the controlled part is connected with the second transmission part, the fourth transmission part idles on the engine oil pump shaft through the overrunning clutch, in the second working state, the controlled part is separated from the second transmission part, the second transmission part idles on the engine oil pump shaft through the bearing, and the fourth transmission part drives the engine oil pump shaft through the overrunning clutch;

or,

the controlled piece is installed on the driving shaft and is adjacent to the first transmission piece, the first transmission piece is installed on the driving shaft through the bearing, the second transmission piece is fixedly installed on the engine oil pump shaft, the third transmission piece is installed on the driving shaft through the overrunning clutch, the fourth transmission piece is fixedly installed on the engine oil pump shaft, in the first working state, the controlled piece is connected with the first transmission piece, the third transmission piece idles on the driving shaft through the overrunning clutch, in the second working state, the controlled piece is separated from the first transmission piece, the first transmission piece idles on the driving shaft through the bearing, and the driving shaft drives the third transmission piece through the overrunning clutch.

Optionally, the controlled member is axially movably and circumferentially lockingly mounted on the drive shaft or the oil pump shaft, the first transmission mechanism is bidirectionally idly mounted between the drive shaft and the oil pump shaft by a first mounting structure, the second transmission mechanism is bidirectionally idly mounted between the drive shaft and the oil pump shaft by a second mounting structure, in the first operating state, the controlled member is engaged with the first transmission mechanism so that the drive shaft drives the oil pump shaft by the first transmission mechanism, the second transmission mechanism is idly mounted relative to the drive shaft and the oil pump shaft by the second mounting structure, in the second operating state, the controlled member is disengaged from the first transmission mechanism and engaged with the second transmission mechanism, and the first transmission mechanism is idly mounted relative to the drive shaft and the oil pump shaft by the first mounting structure, the driving shaft drives the engine oil pump shaft through the second transmission mechanism.

Optionally, the first transmission mechanism comprises a first transmission piece and a second transmission piece which are in transmission connection with each other, the second transmission mechanism comprises a third transmission piece and a fourth transmission piece which are in transmission connection with each other, the first mounting structure comprises a first bearing, the second mounting structure comprises a second bearing, wherein,

the controlled piece is arranged on the engine oil pump shaft and is positioned between the second transmission piece and the fourth transmission piece, the first transmission piece is fixedly arranged on the driving shaft, the second transmission piece is arranged on the engine oil pump shaft through a first bearing, the third transmission piece is fixedly arranged on the driving shaft, the fourth transmission piece is arranged on the engine oil pump shaft through a second bearing, the controlled piece is engaged with the second transmission piece in the first working state, the fourth transmission piece idles on the engine oil pump shaft through the second bearing, the controlled piece is disengaged from the second transmission piece and is engaged with the fourth transmission piece in the second working state, and the second transmission piece idles on the engine oil pump shaft through the first bearing;

or,

the controlled element is mounted on the driving shaft and located between the first transmission element and the third transmission element, the first transmission element is mounted on the driving shaft through a first bearing, the second transmission element is fixedly mounted on the engine oil pump shaft, the third transmission element is mounted on the driving shaft through a second bearing, the fourth transmission element is fixedly mounted on the engine oil pump shaft, the controlled element is engaged with the first transmission element in the first working state, the third transmission element idles on the driving shaft through the second bearing, the controlled element is disengaged from the first transmission element and is engaged with the third transmission element in the second working state, and the first transmission element idles on the driving shaft through the first bearing.

Optionally, the first transmission mechanism and the second transmission mechanism are gear pairs respectively, and the controlled member is a friction wheel mounted by a spline extending in the axial direction, and the friction wheel has a friction end surface in frictional engagement with a gear in the corresponding gear pair.

Optionally, the drive device further comprises a third transmission mechanism bidirectionally idly mounted between the drive shaft and the oil pump shaft by a third mounting structure, a transmission ratio of the third transmission mechanism being between the first transmission mechanism and the second transmission mechanism, the third transmission mechanism being idly rotated relative to the drive shaft and the oil pump shaft by the third mounting structure in the first operating state and the second operating state, the oil pump drive device further comprising a third operating state in which the controlled member is engaged with the third transmission mechanism, the first transmission mechanism being idly rotated relative to the drive shaft and the oil pump shaft by the first mounting structure, the second transmission mechanism being idly rotated relative to the drive shaft and the oil pump shaft by the second mounting structure, the driving shaft drives the engine oil pump shaft through the third transmission mechanism.

Optionally, the transmission ratio of the third transmission mechanism is greater than that of the second transmission mechanism, the first transmission mechanism includes a first transmission member and a second transmission member that are mutually connected in a transmission manner, the second transmission mechanism includes a third transmission member and a fourth transmission member that are mutually connected in a transmission manner, the third transmission mechanism includes a fifth transmission member and a sixth transmission member that are mutually connected in a transmission manner, the first mounting structure includes a first bearing, the second mounting structure includes an overrunning clutch, and the third mounting structure includes a second bearing, wherein,

the controlled piece is arranged on the engine oil pump shaft and is positioned between the second transmission piece and a sixth transmission piece, the first transmission piece is fixedly arranged on the driving shaft, the second transmission piece is arranged on the engine oil pump shaft through the first bearing, the third transmission piece is fixedly arranged on the driving shaft, the fourth transmission piece is arranged on the engine oil pump shaft through the overrunning clutch, the fifth transmission piece is fixedly arranged on the driving shaft, the sixth transmission piece is arranged on the engine oil pump shaft through the second bearing, in the first working state, the controlled piece is connected with the second transmission piece, the fourth transmission piece idles on the engine oil pump shaft through the overrunning clutch, and the sixth transmission piece idles on the engine oil pump shaft through the second bearing in the second working state, the controlled part is disengaged from the second transmission part, the second transmission part idles on the oil pump shaft through the first bearing, the sixth transmission part idles on the oil pump shaft through the second bearing, the fourth transmission part drives the oil pump shaft through the overrunning clutch, and in the third working state, the controlled part is engaged with the sixth transmission part, the second transmission part idles on the oil pump shaft through the first bearing, and the fourth transmission part idles on the oil pump shaft through the overrunning clutch;

or,

the controlled element is arranged on the driving shaft and is positioned between the first transmission element and a fifth transmission element, the first transmission element is arranged on the driving shaft through the first bearing, the second transmission element is fixedly arranged on the engine oil pump shaft, the third transmission element is arranged on the driving shaft through the overrunning clutch, the fourth transmission element is fixedly arranged on the engine oil pump shaft, the fifth transmission element is arranged on the driving shaft through the second bearing, the sixth transmission element is fixedly arranged on the engine oil pump shaft, in the first working state, the controlled element is engaged with the first transmission element, the third transmission element idles on the driving shaft through the overrunning clutch, the fifth transmission element idles on the driving shaft through the second bearing, and in the second working state, the controlled element is disengaged from the first transmission element, the first transmission piece idles on the driving shaft through the first bearing, the fifth transmission piece idles on the driving shaft through the second bearing, the driving shaft drives the third transmission piece through the overrunning clutch, in the third working state, the controlled piece is jointed with the fifth transmission piece, the first transmission piece idles on the driving shaft through the first bearing, and the third transmission piece idles on the driving shaft through the overrunning clutch.

According to the technical scheme, the oil pump driving device can selectively drive the oil pump shaft to rotate through the first transmission mechanism or the second transmission mechanism, and the oil pump shaft can have two different rotating speeds due to the fact that the transmission ratio of the first transmission mechanism is different from that of the second transmission mechanism, so that the oil pump can have at least two different discharge capacities, and in the actual use process, the oil discharge capacity of the oil pump can be adjusted adaptively according to different oil demand quantities of an engine during low-speed rotation and high-speed rotation, power loss of the oil pump can be reduced, and waste of the oil is avoided.

According to another aspect of the disclosure, an engine is provided, which includes a crankshaft, a balance shaft, an oil pump driving device as described above, a driving shaft of the driving device is the crankshaft or the balance shaft, and a controller for controlling the controlled member to move according to an engine operating condition.

According to yet another aspect of the present disclosure, a vehicle is provided that includes the engine described above.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic structural diagram of a transmission device or an oil pump driving device according to a first embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a transmission device or an oil pump driving device according to a second embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a transmission device or an oil pump driving device according to a third embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a transmission or an oil pump driving device according to a fourth embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a transmission device or an oil pump driving device according to a fifth embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a transmission device or an oil pump driving device according to a sixth embodiment of the present disclosure.

Description of the reference numerals

1 first transmission mechanism 11 first transmission piece

12 second transmission member 2 second transmission mechanism

21 third transmission member 22 fourth transmission member

3 drive shaft 3' drive shaft

4' driven shaft of machine oil pump shaft

5 controlled member 51 groove

52 convex part 6 bearing

7 overrunning clutch 8 first bearing

9 second bearing 100 third transmission mechanism

101 fifth transmission member 102 sixth transmission member

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

As shown in fig. 1 to 6, the present disclosure provides a transmission device, which includes a driving shaft 3 'and a driven shaft 4', the driving shaft 3 'is connected to the driven shaft 4' through a transmission mechanism, the transmission mechanism includes a first transmission mechanism 1 and a second transmission mechanism 2, and a transmission ratio of the first transmission mechanism 1 is different from a transmission ratio of the second transmission mechanism 2. The transmission device also comprises a controlled part 5, and the transmission device can be selectively enabled to have a first working state and a second working state by controlling the controlled part 5 to move, wherein in the first working state, the driving shaft 3 'drives the driven shaft 4' through the first transmission mechanism 1, and in the second working state, the driving shaft 3 'drives the driven shaft 4' through the second transmission mechanism 2. That is, in the present disclosure, the transmission ratio between the driving shaft 3 'and the driven shaft 4' can be switched by controlling the controlled member 5, which is simple and easy.

Specifically, in an alternative embodiment of the present disclosure, in a first operating state, the controlled member 5 is engaged with the first transmission mechanism 1, so that the driving shaft 3 'drives the driven shaft 4' through the first transmission mechanism 1, the second transmission mechanism 2 idles with respect to the driving shaft 3 'and the driven shaft 4', and in a second operating state, the controlled member 5 is disengaged from the first transmission mechanism 1, the first transmission mechanism 1 idles with respect to the driving shaft 3 'and the driven shaft 4', and the driving shaft 3 'drives the driven shaft 4' through the second transmission mechanism 2. Here, "idle" means that the first transmission mechanism 1 or the second transmission mechanism 2 only operates between the driving shaft 3 ' and the driven shaft 4 ', but the torque of the driving shaft 3 ' cannot be transmitted to the driven shaft 4 ' through the first transmission mechanism 1 or the second transmission mechanism 2 and drives the driven shaft 4 ' to rotate. That is, in the first operating state, the power of the driving shaft 3 'is transmitted to the driven shaft 4' only through the first transmission mechanism 1, and the rotation speed of the driven shaft 4 'is determined by the transmission ratio of the first transmission mechanism 1, and in the second operating state, the power of the driving shaft 3' is transmitted to the driven shaft 4 'only through the second transmission mechanism 2, and the rotation speed of the driven shaft 4' is determined by the transmission ratio of the second transmission mechanism 2. In this way, because the first transmission mechanism 1 and the second transmission mechanism 2 can idle relative to the two shafts, the positions of the two transmission mechanisms relative to the two shafts do not need to be changed particularly, and the switching of different working states can be realized only by the movement of the controlled piece 5, so that the structure of the transmission device provided by the disclosure is simpler and more reliable. In other possible embodiments, the second transmission 2 can be deactivated in the first operating state, and the first transmission 1 can also be deactivated in the second operating state, which also achieves the object of the present disclosure.

Through the technical scheme, the transmission device provided by the disclosure can be selectively driven by the first transmission mechanism 1 or the second transmission mechanism 2, so that the transmission ratio of the transmission device can be switched between the transmission ratio of the first transmission mechanism 1 and the transmission ratio of the second transmission mechanism 2, and because the transmission ratio of the first transmission mechanism 1 is different from the transmission ratio of the second transmission mechanism 2, the rotating speed of the driven shaft 4 ' in the first working state is different from the rotating speed of the driven shaft 4 ' in the second working state, and the rotating speed of the driven shaft 4 ' is adjustable.

In the mechanical field, a transmission mode that the driving shaft 3 ' drives the driven shaft 4 ' to rotate is applied to a plurality of mechanical devices, so that the transmission device provided by various embodiments of the disclosure can be applied to the mechanical devices, and members connected with the driven shaft 4 ' in the mechanical devices can have different working conditions. For example, as an application embodiment, in the present disclosure, the transmission device may be applied to an engine, where a driving shaft 3 (e.g., a crankshaft or a balance shaft) for driving the oil pump to operate in the engine is equivalent to the driving shaft 3 'and an oil pump shaft 4 is equivalent to the driven shaft 4', so that, under a condition that the rotation speed of the driving shaft 3 is constant, the rotation speed of the oil pump shaft 4 may be adjusted according to an actual working condition of the engine by adjusting the controlled part 5, so that the oil discharge amount of the oil pump may be adaptively adjusted according to different oil demands when the engine rotates at a low speed and at a high speed, which is beneficial to reducing the power loss of the oil pump and avoiding the waste of oil.

Further, in an exemplary embodiment provided by the present disclosure, as shown in fig. 1 and fig. 2, the controlled element 5 is axially movably and lockingly installed on the driving shaft 3 'or the driven shaft 4' in a circumferential direction, the first transmission mechanism 1 is installed between the driving shaft 3 'and the driven shaft 4' in a bi-directional idling manner through a first installation structure, the second transmission mechanism 2 is installed between the driving shaft 3 'and the driven shaft 4' in a unidirectional idling manner through a second installation structure, in a first working state, the controlled element 5 is engaged with the first transmission mechanism 1, the driving shaft 3 'drives the driven shaft 4' to rotate through the first transmission mechanism 1, the second transmission mechanism 2 is idle-rotated relative to the driving shaft 3 'and the driven shaft 4' through the second installation structure, in a second working state, the controlled element 5 is disengaged from the first transmission mechanism 1, the driving shaft 3 'drives the driven shaft 4' to rotate through the second transmission mechanism 2, the first transmission 1 is idle relative to the driving shaft 3 'and the driven shaft 4' by means of a first mounting structure. Here, "two-way idling" means that the first transmission mechanism 1 cannot transmit torque from the drive shaft 3 'to the driven shaft 4' nor from the driven shaft 4 'to the drive shaft 3' although operating, and "one-way idling" means that the second transmission mechanism 2 can transmit torque only from the drive shaft 3 'to the driven shaft 4' but cannot transmit torque from the driven shaft 4 'to the drive shaft 3' although operating. For example, when the actual rotational speed of the output shaft 4 'is less than the rotational speed of the output shaft 4' driven according to the transmission ratio of the second transmission 2, the input shaft 3 'can transmit torque to the output shaft 4' via the second transmission 2, but the output shaft 4 'cannot transmit torque to the input shaft 3' via the second transmission 2.

That is to say, in the first working state, the controlled element 5 is engaged with the first transmission mechanism 1, because the controlled element 5 is circumferentially locked and installed on the driving shaft 3 'or the driven shaft 4', and the controlled element 5 synchronously rotates along with the driving shaft 3 'or the driven shaft 4', the first transmission mechanism 1 can release the bidirectional idling state through the controlled element 5, so as to realize the work of transmitting torque (the torque between the driving shaft 3 'and the driven shaft 4' is transmitted through the controlled element 5 to be engaged), at this time, because the second transmission mechanism 2 has the unidirectional idling performance, even if the driving shaft 3 'drives the second transmission mechanism 2 to operate, the torque cannot be transmitted to the driven shaft 4' through the second transmission mechanism 2, so the second transmission mechanism 2 cannot interfere with the transmission of the first transmission mechanism 1 with a large transmission ratio between two shafts. For example, at this time, the actual rotation speed of the driven shaft 4 'is greater than the rotation speed of the driven shaft 4' driven according to the transmission ratio of the second transmission mechanism 2, and the second transmission mechanism 2 only idles without affecting the operation of the first transmission mechanism 1 with a large transmission ratio.

And when the second working state, the controlled member 5 is separated from the first transmission mechanism 1, and at the moment, the first transmission mechanism 1 recovers the bidirectional idling function, and the first transmission mechanism 1 is in the idling state no matter what transmission ratio the two shafts rotate, so that the working of the second transmission mechanism 2 with smaller transmission ratio is not influenced. In this way, since the second transmission mechanism 2 has only a one-way idling function, it is now possible to transmit torque from the driving shaft 3 'to the driven shaft 4' through the second transmission mechanism 2 having a relatively small transmission ratio. Specifically, taking the first transmission mechanism 1 engaged with the controlled element 5 first as an example, after the first transmission mechanism 1 idles, the rotation speed of the driven shaft 4 ' is reduced, so that through the second mounting structure, when the actual rotation speed of the driven shaft 4 ' is less than the rotation speed of the driven shaft 4 ' driven according to the transmission ratio of the second transmission mechanism 2, the driving shaft 3 ' can transmit torque to the driven shaft 4 ' through the second transmission mechanism 2.

Further, as shown in fig. 1 and fig. 2, the transmission ratio of the first transmission mechanism 1 is greater than that of the second transmission mechanism 2, the first transmission mechanism 1 comprises a first transmission piece 11 and a second transmission piece 12 which are mutually connected in a transmission manner, the second transmission mechanism 2 comprises a third transmission piece 21 and a fourth transmission piece 22 which are mutually connected in a transmission manner, and in order to realize the above-mentioned one-way idling and two-way idling, the first mounting structure comprises a bearing 6 and the second mounting structure comprises an overrunning clutch 7 as an embodiment. The bearing 6 and the overrunning clutch 7 are well known to those skilled in the art, and the structure and the specific working principle thereof are not described in detail herein, but due to the particularity of the application scenario, the overrunning clutch 7 used in the transmission provided by the present disclosure has the advantages that: the overrunning clutch 7 is used for realizing the connection or the disconnection of the two rotating elements by using the rotating speed difference between the inner rotating element and the outer rotating element, so that the connection or the disconnection of power is not required to be provided by using a motor or a hydraulic module, the second transmission mechanism 2 can automatically connect or disconnect the torque transmission between the driving shaft 3 'and the driven shaft 4' through the overrunning clutch 7, and the structure of the transmission device provided by the disclosure is simpler and more reliable.

As mentioned above, the controlled element 5 may be installed on the driving shaft 3 ' or on the driven shaft 4 ', and in the first embodiment provided by the present disclosure, as shown in fig. 1, the controlled element 5 is installed on the driven shaft 4 '. Specifically, controlled piece 5 is installed on driven shaft 4 ' and is adjacent with second driving medium 12, first driving medium 11 fixed mounting is on driving shaft 3 ', second driving medium 12 is installed on driven shaft 4 ' through bearing 6, third driving medium 21 fixed mounting is on driving shaft 3 ', fourth driving medium 22 is installed on driven shaft 4 ' through freewheel clutch 7, controlled piece 5 can be located the outside of second driving medium 12, also can be located between second driving medium 12 and fourth driving medium 22. In the first working state, the controlled element 5 moves along the axial direction of the driven shaft 4 'and is engaged with the second transmission element 12, the driving shaft 3' drives the first transmission element 11 to rotate and transmits the torque to the second transmission element 12 through the first transmission element 11, so that the second transmission element 12 transmits the torque to the driven shaft 4 'through the controlled element 5 to drive the driven shaft 4' to rotate. At this time, the rotation speed of the second transmission member 12 is the same as that of the driven shaft 4 ', because the transmission ratio of the first transmission member 11 is greater than that of the second transmission member 2, and the rotation speed of the second transmission member 12 is greater than that of the fourth transmission member 22, that is, the rotation speed of the driven shaft 4' is greater than that of the fourth transmission member 22, according to the working principle of the overrunning clutch 7, the rotation speed of the inner ring is greater than that of the outer ring, the overrunning clutch 7 is disengaged, and the third transmission member 21 cannot transmit torque from the driving shaft 3 'to the driven shaft 4' through the overrunning clutch 7. In a second working state, the controlled element 5 moves along the axial direction of the driven shaft 4 'and is separated from the second transmission element 12, the second transmission element 12 idles on the driven shaft 4' through the bearing 6, the second transmission element 12 rotates relative to the driven shaft 4 ', at the moment, the rotating speed of the driven shaft 4' is reduced, when the rotating speed of the driven shaft 4 'is reduced to be less than that of the fourth transmission element 22, according to the working principle of the overrunning clutch 7, the rotating speed of an inner ring of the overrunning clutch 7 is less than that of an outer ring of the overrunning clutch 7, the overrunning clutch 7 is connected, and the third transmission element 21 transmits torque in the direction from the driving shaft 3' to the driven shaft 4 'through the overrunning clutch 7 so as to drive the driven shaft 4' to rotate.

In the second embodiment provided by the present disclosure, as shown in fig. 2, the controlled element 5 is installed on the driving shaft 3 ', specifically, the controlled element 5 is installed on the driving shaft 3' and adjacent to the first transmission element 11, the first transmission element 11 is installed on the driving shaft 3 'through the bearing 6, the second transmission element 12 is fixedly installed on the driven shaft 4', the third transmission element 21 is installed on the driving shaft 3 'through the overrunning clutch 7, and the fourth transmission element 22 is fixedly installed on the driven shaft 4', in the first working state, the controlled element 5 moves along the axial direction of the driving shaft 3 'and is engaged with the first transmission element 11, the driving shaft 3' drives the first transmission element 11 to rotate through the controlled element 5, and transmits the torque to the driven shaft 4 'through the first transmission element 11 and the second transmission element 12, so as to rotate the driven shaft 4'. At this time, the rotational speed of the third transmission member 21 is greater than that of the drive shaft 3 ', that is, the rotational speed of the outer race of the overrunning clutch 7 is greater than that of the inner race thereof, the overrunning clutch 7 is disengaged, and the third transmission member 21 idles on the drive shaft 3' via the overrunning clutch 7. In a second working state, the controlled element 5 moves along the axial direction of the driving shaft 3 'and is separated from the first transmission element 11, the first transmission element 11 idles on the driving shaft 3' through the bearing 6, the rotating speed of the driven shaft 4 'is reduced, so that the rotating speeds of the fourth transmission element 22 and the third transmission element 21 are reduced, when the rotating speed of the third transmission element 21 is reduced to be less than that of the driving shaft 3', the rotating speed of the outer ring of the overrunning clutch 7 is less than that of the inner ring of the overrunning clutch 7, the overrunning clutch 7 is connected, and the driving shaft 3 'drives the third transmission element 21 through the overrunning clutch 7, so that the fourth transmission element 22 and the driven shaft 4' are driven to rotate. That is, since the transmission ratio of the first transmission mechanism 1 is greater than that of the second transmission mechanism 2, when the controlled element is engaged with the first transmission element 11, the driven shaft 4' rotates at a high speed, so as to drive the third transmission element 21 connected with the overrunning clutch 7 to rotate at a high speed, so that the rotating speed of the outer ring of the overrunning clutch 7 is greater than that of the inner ring thereof, and at this time, the overrunning clutch 7 is in an overrunning state, and the outer ring and the inner ring thereof rotate at respective speeds; when the controlled piece is separated from the first transmission piece 11, the rotating speed of the driven shaft 4 ' is reduced until the rotating speed of the driven shaft 4 ' is just reduced to be less than that of the driving shaft 3 ', the rotating speed of the outer ring of the overrunning clutch 7 is less than that of the inner ring of the overrunning clutch 7, and at the moment, the overrunning clutch 7 is in a combined state, and the outer ring and the inner ring rotate together. It should be noted that the clutch manner of the overrunning clutch 7 used in the second embodiment is opposite to that of the overrunning clutch 7 used in the first embodiment.

In addition, in other embodiments, the controlled member 5 may be mounted on the driving shaft 3 'and the overrunning clutch 7 may be mounted on the driven shaft 4', or the controlled member 5 may be mounted on the driven shaft 4 'and the overrunning clutch 7 may be mounted on the driving shaft 3'. The working principle of the transmission device of the two embodiments is the same as that of the transmission device described in the first embodiment and the second embodiment, and the description thereof is omitted.

In another exemplary embodiment provided by the present disclosure, as shown in fig. 3 and 4, the controlled member 5 is mounted on the driving shaft 3 'or the driven shaft 4' in an axially movable and circumferentially lockable manner, the first transmission mechanism 1 is mounted between the driving shaft 3 'and the driven shaft 4' in a bidirectionally idle-rotatable manner by a first mounting structure, the second transmission mechanism 2 is mounted between the driving shaft 3 'and the driven shaft 4' in a bidirectionally idle-rotatable manner by a second mounting structure, in a first working state, the controlled part 5 is jointed with the first transmission mechanism 1, the driving shaft 3 'drives the driven shaft 4' to rotate through the first transmission mechanism 1, the second transmission mechanism 2 idles relative to the driving shaft 3 'and the driven shaft 4' through a second mounting structure, in the second operating state, the idle part is disengaged from the first transmission mechanism 1 and engaged with the second transmission mechanism 2, and the first transmission mechanism 1 idles relative to the driving shaft 3 'and the driven shaft 4' through the first mounting structure. Here, "two-way idling" means that the first transmission mechanism 1 and the second transmission mechanism 2 cannot transmit torque from the drive shaft 3 'to the driven shaft 4' nor from the driven shaft 4 'to the drive shaft 3' although they are operated. Further, this embodiment is different from the above-described embodiments (first and second embodiments) in that: in this embodiment, the first transmission 1 and the second transmission 2 are mounted in a bi-directional idle manner between the input shaft 3 'and the output shaft 4', and the switching on or off of the torque transmission is controlled only by the engagement or disengagement of the controlled member 5 with the corresponding transmission.

That is to say, in the first operating state, the controlled element 5 is engaged with the first transmission mechanism 1, since the controlled element 5 is circumferentially lockingly mounted on the driving shaft 3 'or the driven shaft 4', the controlled element 5 rotates synchronously with the driving shaft 3 'or the driven shaft 4', the first transmission mechanism 1 transmits torque through the controlled element 5, and the second transmission mechanism 2 idles, in the second operating state, the controlled element 5 is engaged with the second transmission mechanism 2, the second transmission mechanism 2 transmits torque through the controlled element 5, and the first transmission mechanism 1 idles.

Further, as shown in fig. 3 and 4, the first transmission mechanism 1 includes a first transmission member 11 and a second transmission member 12 which are in transmission connection with each other, the second transmission mechanism 2 includes a third transmission member 21 and a fourth transmission member 22 which are in transmission connection with each other, the first mounting structure includes a first bearing 8, and the second mounting structure includes a second bearing 9.

As described above, the controlled element 5 may be installed on the driving shaft 3 ' or on the driven shaft 4 ', and in the third embodiment provided by the present disclosure, as shown in fig. 3, the controlled element 5 is installed on the driven shaft 4 '. Specifically, the controlled member 5 is installed on the driven shaft 4 ' and is located between the second transmission member 12 and the fourth transmission member 22, the first transmission member 11 is fixedly installed on the driving shaft 3 ', the second transmission member 12 is installed on the driven shaft 4 ' through the first bearing 8, the third transmission member 21 is fixedly installed on the driving shaft 3 ', the fourth transmission member 22 is installed on the driven shaft 4 ' through the second bearing 9, in the first working state, the controlled piece 5 moves along the axial direction of the driven shaft 4 ' and is jointed with the second transmission piece 12, the second transmission piece 12 is jointed with the driven shaft 4 ' through the controlled piece 5, the driving shaft 3 ' drives the first transmission piece 11 to rotate and transmits the torque to the second transmission piece 12 through the first transmission piece 11, so that the second transmission member 12 transmits torque to the driven shaft 4 ' through the controlled member 5 to drive the driven shaft 4 ' to rotate, and at the same time, the fourth transmission member 22 idles on the driven shaft 4 ' through the second bearing 9. In the second working state, the controlled element 5 is separated from the second transmission element 12 and is connected with the fourth transmission element 22, the fourth transmission element 22 is connected with the driven shaft 4 ' through the controlled element 5, the driving shaft 3 ' drives the third transmission element 21 to rotate and transmits the torque to the fourth transmission element 22 through the third transmission element 21, so that the fourth transmission element 22 transmits the torque to the driven shaft 4 ' through the controlled element 5 to drive the driven shaft 4 ' to rotate, and at the moment, the second transmission element 12 idles on the driven shaft 4 ' through the first bearing 8.

In the fourth embodiment provided by the present disclosure, as shown in fig. 4, the controlled member 5 is installed on the driving shaft 3 'and located between the first transmission member 11 and the third transmission member 21, the first transmission member 11 is installed on the driving shaft 3' through the first bearing 8, the second transmission member 12 is fixedly installed on the driven shaft 4 ', the third transmission member 21 is installed on the driving shaft 3' through the second bearing 9, the fourth transmission member 22 is fixedly installed on the driven shaft 4 ', in the first working state, the controlled member 5 is engaged with the first transmission member 11, the driving shaft 3' is engaged with the first transmission member 11 through the controlled member 5 to transmit the torque to the driven shaft 4 'through the first transmission member 11 and the second transmission member 12, and the third transmission member 21 idles on the driving shaft 3' through the second bearing 9. In the second operating state, the controlled member 5 is disengaged from the first transmission member 11 and engaged with the third transmission member 21, the driving shaft 3 ' is engaged with the third transmission member 21 through the controlled member 5 to transmit torque to the driven shaft 4 ' through the third transmission member 21 and the fourth transmission member 22, and the first transmission member 11 idles on the driving shaft 3 ' through the first bearing 8. Alternatively, in the third and fourth embodiments, the gear ratio of the first transmission mechanism 1 may be larger than that of the second transmission mechanism 2, and the gear ratio of the first transmission mechanism 1 may also be smaller than that of the second transmission mechanism 2.

The first and second embodiments described above are different from the third and fourth embodiments in the manner of switching the gear ratio: the first embodiment and the second embodiment mainly utilize the working principle of the overrunning clutch 7, and the switching of the transmission ratio of the transmission device is realized through the cooperation of the controlled element 5, the bearing 6 and the overrunning clutch 7, specifically, in the first working state, the torque transmission of the driving shaft 3 'and the driven shaft 4' is switched on through the controlled element 5, and in the second working state, the torque transmission of the driving shaft 3 'and the driven shaft 4' is switched on through the overrunning clutch 7. In the third and fourth embodiments, the gear ratio of the transmission device is switched mainly through the cooperation of the controlled element 5, the first bearing 8 and the second bearing 9, neither the first transmission mechanism 1 nor the second transmission mechanism 2 can transmit torque alone, and the on and off of torque transmission is controlled through the engagement or disengagement of the controlled element 5 with the corresponding transmission mechanism, that is, the controlled element 5 is engaged with only one of the first transmission mechanism 1 and the second transmission mechanism 2, so that the driving shaft 3 'can drive the driven shaft 4' through only one of the first transmission mechanism 1 and the second transmission mechanism 2.

As shown in fig. 5 and 6, in one embodiment provided by the present disclosure, the transmission device further includes a third transmission mechanism 100, the first transmission mechanism 1 is bidirectionally idly mounted between the driving shaft 3 'and the driven shaft 4' through a first mounting structure, the second transmission mechanism 2 is unidirectionally idly mounted between the driving shaft 3 'and the driven shaft 4' through a second mounting structure, the third transmission mechanism 100 is bidirectionally idly mounted between the driving shaft 3 'and the driven shaft 4' through a third mounting structure, a transmission ratio of the third transmission mechanism 100 is between the first transmission mechanism 1 and the second transmission mechanism 2, in the first operating state and the second operating state, the third transmission mechanism 100 is idly mounted with respect to the driving shaft 3 'and the driven shaft 4' through a third mounting structure, the transmission device further includes a third operating state, in the third operating state, the controlled member 5 is engaged with the third transmission mechanism 100, the first transmission mechanism 1 idles relative to the driving shaft 3 'and the driven shaft 4' through a first mounting structure, the second transmission mechanism 2 idles relative to the driving shaft 3 'and the driven shaft 4' through a second mounting structure, and the driving shaft 3 'drives the driven shaft 4' through a third transmission mechanism 100. Thus, the transmission of the present disclosure can be switched between three different gear ratios, with the driven shaft 4' having three different rotational speeds.

Further, in the exemplary embodiment provided by the present disclosure, the gear ratio of the first transmission mechanism 1 is larger than the gear ratio of the third transmission mechanism 100, and the gear ratio of the third transmission mechanism 100 is larger than the gear ratio of the second transmission mechanism 2. The third transmission mechanism 100 comprises a fifth transmission piece 101 and a sixth transmission piece 102 which are in transmission connection with each other, the first mounting structure comprises a first bearing 8, the second mounting structure comprises an overrunning clutch 7, and the third mounting structure comprises a second bearing 9.

As described above, the controlled element 5 may be installed on the driving shaft 3 ' or on the driven shaft 4 ', and in a fifth embodiment provided in the present disclosure, as shown in fig. 5, the controlled element 5 is installed on the driven shaft 4 ' and located between the second transmission element 12 and the sixth transmission element 102, the first transmission element 11 is fixedly installed on the driving shaft 3 ', the second transmission element 12 is installed on the driven shaft 4 ' through the first bearing 8, the third transmission element 21 is fixedly installed on the driving shaft 3 ', the fourth transmission element 22 is installed on the driven shaft 4 ' through the overrunning clutch 7, the fifth transmission element 101 is fixedly installed on the driving shaft 3 ', and the sixth transmission element 102 is installed on the driven shaft 4 ' through the second bearing 9. In a first working state, the controlled element 5 is connected with the second transmission element 12, the rotating speed of the outer ring of the overrunning clutch 7 is less than that of the inner ring of the overrunning clutch 7, the overrunning clutch 7 is separated, the fourth transmission element 22 idles on the driven shaft 4 'through the overrunning clutch 7, the sixth transmission element 102 idles on the driven shaft 4' through the second bearing 9, and the first transmission mechanism 1 transmits the torque from the driving shaft 3 'to the driven shaft 4' through the controlled element 5. When the controlled element 5 is separated from the second transmission element 12, the rotating speed of the driven shaft 4 ' is reduced, the controlled element 5 can be connected with the sixth transmission element 102 to enable the transmission device to enter a third working state, at this time, because the rotating speed of the third transmission mechanism 100 is greater than that of the second transmission mechanism 2, the rotating speed of the outer ring of the overrunning clutch 7 is still less than that of the inner ring of the overrunning clutch 7, the overrunning clutch 7 is in a separated state, the fourth transmission element 22 idles on the driven shaft 4 ' through the overrunning clutch 7, the second transmission element 12 idles on the driven shaft 4 ' through the first bearing 8, and the sixth transmission element 102 transmits the torque from the driving shaft 3 ' to the driven shaft 4 ' through the controlled element 5. When the controlled element 5 is disengaged from both the second transmission element 12 and the sixth transmission element 102, the rotating speed of the driven shaft 4 ' further decreases, the transmission device enters a second working state, when the rotating speed of the driven shaft 4 ' decreases to be less than that of the fourth transmission element 22, the rotating speed of the outer ring of the overrunning clutch 7 is greater than that of the inner ring of the overrunning clutch 7, the overrunning clutch 7 is in a joint state, the fourth transmission mechanism can transmit torque through the overrunning clutch 7, so that the fourth transmission element 22 drives the driven shaft 4 ' to rotate through the overrunning clutch 7, at the moment, the second transmission element 12 idles on the driven shaft 4 ' through the first bearing 8, and the sixth transmission element 102 idles on the driven shaft 4 ' through the second bearing 9.

In a sixth embodiment provided by the present disclosure, as shown in fig. 6, the controlled element 5 is mounted on the driving shaft 3 ' and located between the first transmission element 11 and the fifth transmission element 101, the first transmission element 11 is mounted on the driving shaft 3 ' through the first bearing 8, the second transmission element 12 is fixedly mounted on the driven shaft 4 ', the third transmission element 21 is mounted on the driving shaft 3 ' through the overrunning clutch 7, the fourth transmission element 22 is fixedly mounted on the driven shaft 4 ', the fifth transmission element 101 is mounted on the driving shaft 3 ' through the second bearing 9, the sixth transmission element 102 is fixedly mounted on the driven shaft 4 ', in the first working state, the controlled element 5 is engaged with the first transmission element 11, the third transmission element 21 idles on the driving shaft 3 ' through the overrunning clutch 7, the fifth transmission element 101 idles on the driving shaft 3 ' through the second bearing 9, and in the second working state, the controlled element 5 is disengaged from the first transmission element 11, the first transmission piece 11 idles on the driving shaft 3 ' through the first bearing 8, the fifth transmission piece 101 idles on the driving shaft 3 ' through the second bearing 9, the driving shaft 3 ' drives the third transmission piece 21 through the overrunning clutch 7, in a third working state, the controlled piece 5 is connected with the fifth transmission piece 101, the first transmission piece 11 idles on the driving shaft 3 ' through the first bearing 8, and the third transmission piece 21 idles on the driving shaft 3 ' through the overrunning clutch 7. The working principle of the sixth embodiment is basically the same as that of the fifth embodiment, and the description thereof is omitted. Note that the clutch mode of the overrunning clutch 7 used in the sixth embodiment is opposite to the clutch mode of the overrunning clutch 7 used in the fifth embodiment, that is, the overrunning clutch 7 used in the sixth embodiment is in the disengaged state when the rotation speed of the outer race is greater than that of the inner race, and the overrunning clutch 7 is in the engaged state when the rotation speed of the outer race is less than that of the inner race.

In addition, the transmission modes of the first transmission mechanism 1, the second transmission mechanism 2, and the third transmission mechanism 100 may be various, and in an embodiment provided by the present disclosure, the first transmission mechanism 1, the second transmission mechanism 2, and the third transmission mechanism 100 are all gear pairs, that is, the first transmission mechanism 1, the second transmission mechanism 2, and the third transmission mechanism 100 all include two gears engaged with each other. In other embodiments, the two gears of the first transmission mechanism 1, the second transmission mechanism 2, and the third transmission mechanism 100 may transmit power through a chain. Alternatively, the first transmission mechanism 1, the second transmission mechanism 2, and the third transmission mechanism 100 may be two pulleys between which power is transmitted by a belt.

As shown in fig. 1 to 6, in an exemplary embodiment provided by the present disclosure, the controlled member 5 is a friction wheel having a friction end surface that frictionally engages with a gear in the corresponding gear pair. And the controlled piece 5 is arranged on the corresponding shaft through a spline extending along the axial direction, when the friction wheel is jointed with the first transmission mechanism 1 or the second transmission mechanism 2, the friction end surface of the controlled piece is abutted against the surface of the first transmission mechanism 1 or the second transmission mechanism 2, so that the torque transmission between the friction wheel and the first transmission mechanism 1 or the second transmission mechanism 2 is switched on.

Further, in the first, second, third and fourth embodiments, as shown in fig. 1 to 4, the end surface of the friction wheel close to the first transmission mechanism 1 is formed with the convex portion 52, and the top surface of the convex portion 52 is formed as the above-mentioned friction end surface. In the fifth embodiment and the sixth embodiment, as shown in fig. 5 and 6, the protrusions 52 are formed on both of the opposite end surfaces of the friction wheel (the end surface close to the first transmission mechanism 1 and the end surface close to the third transmission mechanism 100), and the top surfaces of the protrusions 52 are formed as friction end surfaces.

In order to drive the friction wheel to move, so that the friction wheel can be selectively engaged with a corresponding transmission mechanism, the transmission device provided by the present disclosure further comprises a driving device for driving the friction wheel to move, the driving device comprises a shifting fork, a groove 51 for accommodating the shifting fork is formed on the outer periphery of the friction wheel, and the groove 51 extends along the circumferential direction of the friction wheel. By shifting the fork, the friction wheel can be moved in the axial direction of the driving shaft 3 'or the driven shaft 4' so as to be engaged with the corresponding transmission mechanism.

Furthermore, the driving device further comprises a driving oil cylinder for driving the shifting fork to move, and a telescopic rod of the driving oil cylinder is connected to the shifting fork, so that the shifting fork can be driven to move through the expansion and contraction of the telescopic rod, and the friction wheel is driven to move along the axial direction of the driving shaft 3 'or the driven shaft 4'.

As previously described, the transmission provided by the present disclosure is applied to an engine to drive an oil pump to operate. Therefore, as shown in fig. 1 to 6, the present disclosure further provides an oil pump driving device, including an oil pump shaft 4 and a driving shaft 3, where the oil pump shaft 4 is connected to the driving shaft 3 through a transmission mechanism, the transmission mechanism includes a first transmission mechanism 1 and a second transmission mechanism 2, a transmission ratio of the first transmission mechanism 1 is greater than a transmission ratio of the second transmission mechanism 2, the driving device further includes a controlled part 5, and the oil pump driving device can selectively enable the oil pump driving device to have a first working state and a second working state by controlling the controlled part 5 to move, in the first working state, the driving shaft 3 drives the oil pump shaft 4 through the first transmission mechanism 1, and in the second working state, the driving shaft 3 drives the oil pump shaft 4 through the second transmission mechanism 2.

Here, the drive shaft 3 for driving the oil pump shaft 4 to rotate in the engine corresponds to the drive shaft 3 'in the first to sixth embodiments, the oil pump shaft 4 corresponds to the driven shaft 4' in the first to sixth embodiments, and the first transmission mechanism 1 and the second transmission mechanism 2 have the same structure and the same operation principle as those of the first transmission mechanism 1 and the second transmission mechanism 2 in the first to sixth embodiments. The driving shaft 3 may be a crankshaft in the engine, a balance shaft in the engine, or another shaft in the engine for driving a pump shaft of the engine oil to rotate.

In this way, the oil pump driving device provided by the present disclosure can selectively drive the oil pump shaft 4 to rotate through the first transmission mechanism 1 or the second transmission mechanism 2, and because the transmission ratio of the first transmission mechanism 1 is different from that of the second transmission mechanism 2, the oil pump shaft 4 can have two different rotating speeds, so that the oil pump can have two different displacements. When the engine runs at a low speed, the required engine oil amount is large, the engine oil pump driving device is in a first working state, the driving shaft 3 drives the engine oil pump shaft 4 through the first transmission mechanism 1, so that the engine oil pump shaft 4 runs at a high speed, the engine oil discharge amount is large, and oil pressure is quickly established by each friction pair of the engine; when the engine runs at high speed or stably, the required engine oil amount is small, the engine oil pump driving device is automatically switched from the first working state to the second working state, the driving shaft 3 drives the engine oil pump shaft 4 through the second transmission mechanism 2, so that the engine oil pump shaft 4 runs at low speed, the engine oil discharge capacity is small, and the engine oil discharge capacity can be equal to the engine discharge capacity required when the engine runs at high speed or stably. Of course, the oil pump driving device provided by the present disclosure may also have the third transmission mechanism 100 and the third operating state, so that the oil pump shaft 4 has three operating states of high-speed rotation, medium-speed rotation, and low-speed rotation, and thus the engine oil has three different displacements.

By the technical scheme, the oil pump driving device can adjust the rotating speed of the oil pump shaft 4 according to the actual working condition of the engine, so that the oil discharge capacity of the oil pump can be adaptively adjusted according to the oil quantity demands of the engine at different rotating speeds, and the aims of reducing the power loss of the oil pump and avoiding the waste of the oil are fulfilled.

According to another aspect of the present disclosure, an engine is provided, which includes a crankshaft, a balance shaft, an oil pump, the oil pump driving device, and a controller. In the engine, the oil pump may be driven by a crankshaft or a balance shaft, and therefore, the drive shaft 3 for driving the oil pump shaft 4 to rotate in the oil pump drive device may be a crankshaft or a balance shaft in the engine. The controller is used for controlling the controlled element 5 of the oil pump driving device to move according to the working condition of the engine, optionally, the controller can be an ECU of a vehicle, the ECU can receive the actual working condition information of the engine and judge the oil amount range required by the engine, and then the controlled element 5 is controlled to move through the OCV, so that the oil pump driving device has a first working state or a second working state.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. An oil pump driving device, comprising an oil pump shaft (4) and a driving shaft (3), wherein the oil pump shaft (4) is connected to the driving shaft (3) through a transmission mechanism, the transmission mechanism comprises a first transmission mechanism (1) and a second transmission mechanism (2), the transmission ratio of the first transmission mechanism (1) is different from the transmission ratio of the second transmission mechanism (2), the oil pump driving device further comprises a controlled member (5), the controlled member (5) is controlled to move to selectively enable the oil pump driving device to have a first working state and a second working state, in the first working state, the driving shaft (3) drives the oil pump shaft (4) through the first transmission mechanism (1), and in the second working state, the driving shaft (3) drives the oil pump shaft (4) through the second transmission mechanism (2),

the controlled piece (5) is mounted on the drive shaft (3) or the engine oil pump shaft (4) in an axially movable and circumferentially lockable manner, the first transmission mechanism (1) is mounted between the drive shaft (3) and the engine oil pump shaft (4) in a bi-directional idle-running manner by a first mounting structure, the second transmission mechanism (2) is mounted between the drive shaft (3) and the engine oil pump shaft (4) in a unidirectional idle-running manner by a second mounting structure, in the first working state, the controlled piece (5) is engaged with the first transmission mechanism (1) so that the drive shaft (3) drives the engine oil pump shaft (4) by the first transmission mechanism (1), and the second transmission mechanism (2) is idle-running relative to the drive shaft (3) and the engine oil pump shaft (4) by the second mounting structure, in the second working state, the controlled piece (5) is separated from the first transmission mechanism (1), the first transmission mechanism (1) idles relative to the driving shaft (3) and the engine oil pump shaft (4) through the first mounting structure, the driving shaft (3) drives the engine oil pump shaft (4) through the second transmission mechanism (2),

wherein the first mounting structure comprises a bearing (6) and the second mounting structure comprises an overrunning clutch (7).

2. The oil pump drive according to claim 1, characterized in that the transmission ratio of the first transmission mechanism (1) is greater than the transmission ratio of the second transmission mechanism (2), the first transmission mechanism (1) comprises a first transmission member (11) and a second transmission member (12) which are in transmission connection with each other, and the second transmission mechanism (2) comprises a third transmission member (21) and a fourth transmission member (22) which are in transmission connection with each other, wherein,

the controlled piece (5) is arranged on the engine oil pump shaft (4) and is adjacent to the second transmission piece (12), the first transmission piece (11) is fixedly arranged on the driving shaft (3), the second transmission piece (12) is arranged on the engine oil pump shaft (4) through the bearing (6), the third transmission piece (21) is fixedly arranged on the driving shaft (3), the fourth transmission piece (22) is arranged on the engine oil pump shaft (4) through the overrunning clutch (7), in the first working state, the controlled piece (5) is connected with the second transmission piece (12), the fourth transmission piece (22) idles on the engine oil pump shaft (4) through the overrunning clutch (7), in the second working state, the controlled piece (5) is separated from the second transmission piece (12), and the second transmission piece (12) is idled on the engine oil pump shaft (4) through the bearing (6), the fourth transmission piece (22) drives the engine oil pump shaft (4) through the overrunning clutch (7);

or,

the controlled piece (5) is arranged on the driving shaft (3) and is adjacent to the first transmission piece (11), the first transmission piece (11) is arranged on the driving shaft (3) through the bearing (6), the second transmission piece (12) is fixedly arranged on the engine oil pump shaft (4), the third transmission piece (21) is arranged on the driving shaft (3) through an overrunning clutch (7), the fourth transmission piece (22) is fixedly arranged on the engine oil pump shaft (4), the controlled piece (5) is jointed with the first transmission piece (11) in the first working state, the third transmission piece (21) idles on the driving shaft (3) through the overrunning clutch (7), the controlled piece (5) is separated from the first transmission piece (11) in the second working state, and the first transmission piece (11) idles on the driving shaft (3) through the bearing (6), the driving shaft (3) drives the third transmission piece (21) through the overrunning clutch (7).

3. The oil pump drive according to claim 1, characterized in that the drive further comprises a third transmission mechanism (100), the third transmission mechanism (100) being bidirectionally idly mounted between the drive shaft (3) and the oil pump shaft (4) by a third mounting structure, a transmission ratio of the third transmission mechanism (100) being intermediate between the first transmission mechanism (1) and the second transmission mechanism (2), the third transmission mechanism (100) being idly rotated relative to the drive shaft (3) and the oil pump shaft (4) by the third mounting structure in the first operating state and the second operating state, the oil pump drive further comprising a third operating state in which the controlled member (5) is engaged with the third transmission mechanism (100), the first transmission mechanism (1) being relatively engaged with the drive shaft (3) and the oil pump shaft (4) by the first mounting structure The shaft (4) idles, the second transmission mechanism (2) idles relative to the driving shaft (3) and the engine oil pump shaft (4) through a second mounting structure, and the driving shaft (3) drives the engine oil pump shaft (4) through the third transmission mechanism (100).

4. The oil pump drive device according to claim 3, characterized in that the transmission ratio of the third transmission mechanism (100) is greater than the transmission ratio of the second transmission mechanism (2), the first transmission mechanism (1) comprises a first transmission member (11) and a second transmission member (12) which are in transmission connection with each other, the second transmission mechanism (2) comprises a third transmission member (21) and a fourth transmission member (22) which are in transmission connection with each other, the third transmission mechanism (100) comprises a fifth transmission member (101) and a sixth transmission member (102) which are in transmission connection with each other, the first mounting structure comprises a first bearing (8), the second mounting structure comprises an overrunning clutch (7), the third mounting structure comprises a second bearing (9), wherein,

the controlled piece (5) is installed on the engine oil pump shaft (4) and is positioned between the second transmission piece (12) and a sixth transmission piece (102), the first transmission piece (11) is fixedly installed on the driving shaft (3), the second transmission piece (12) is installed on the engine oil pump shaft (4) through the first bearing (8), the third transmission piece (21) is fixedly installed on the driving shaft (3), the fourth transmission piece (22) is installed on the engine oil pump shaft (4) through the overrunning clutch (7), the fifth transmission piece (101) is fixedly installed on the driving shaft (3), the sixth transmission piece (102) is installed on the engine oil pump shaft (4) through the second bearing (9), and in the first working state, the controlled piece (5) is jointed with the second transmission piece (12), the fourth transmission element (22) idles on the oil pump shaft (4) through the overrunning clutch (7), the sixth transmission element (102) idles on the oil pump shaft (4) through the second bearing (9), in the second working state, the controlled element (5) is separated from the second transmission element (12), the second transmission element (12) idles on the oil pump shaft (4) through the first bearing (8), the sixth transmission element (102) idles on the oil pump shaft (4) through the second bearing (9), the fourth transmission element (22) drives the oil pump shaft (4) through the overrunning clutch (7), in the third working state, the controlled element (5) is engaged with the sixth transmission element (102), and the second transmission element (12) idles on the oil pump shaft (4) through the first bearing (8), the fourth transmission piece (22) idles on the engine oil pump shaft (4) through the overrunning clutch (7);

or,

the controlled piece (5) is installed on the driving shaft (3) and located between the first transmission piece (11) and the fifth transmission piece (101), the first transmission piece (11) is installed on the driving shaft (3) through the first bearing (8), the second transmission piece (12) is fixedly installed on the engine oil pump shaft (4), the third transmission piece (21) is installed on the driving shaft (3) through the overrunning clutch (7), the fourth transmission piece (22) is fixedly installed on the engine oil pump shaft (4), the fifth transmission piece (101) is installed on the driving shaft (3) through the second bearing (9), the sixth transmission piece (102) is fixedly installed on the engine oil pump shaft (4), and in the first working state, the controlled piece (5) is connected with the first transmission piece (11), the third transmission element (21) idles on the drive shaft (3) through the overrunning clutch (7), the fifth transmission element (101) idles on the drive shaft (3) through the second bearing (9), the controlled element (5) is disengaged from the first transmission element (11) in the second working state, the first transmission element (11) idles on the drive shaft (3) through the first bearing (8), the fifth transmission element (101) idles on the drive shaft (3) through the second bearing (9), the drive shaft (3) drives the third transmission element (21) through the overrunning clutch (7), the controlled element (5) is engaged with the fifth transmission element (101) in the third working state, and the first transmission element (11) idles on the drive shaft (3) through the first bearing (8), the third transmission element (21) is free-wheeling on the drive shaft (3) via the overrunning clutch (7).

5. The oil pump drive according to any one of claims 1-4, characterized in that the first transmission mechanism (1) and the second transmission mechanism (2) are each a gear pair, and the controlled member (5) is a friction wheel mounted by axially extending splines, the friction wheel having a friction end surface frictionally engaging with a gear of the corresponding gear pair.

6. An oil pump driving device, comprising an oil pump shaft (4) and a driving shaft (3), wherein the oil pump shaft (4) is connected to the driving shaft (3) through a transmission mechanism, the transmission mechanism comprises a first transmission mechanism (1) and a second transmission mechanism (2), the transmission ratio of the first transmission mechanism (1) is different from the transmission ratio of the second transmission mechanism (2), the oil pump driving device further comprises a controlled member (5), the controlled member (5) is controlled to move to selectively enable the oil pump driving device to have a first working state and a second working state, in the first working state, the driving shaft (3) drives the oil pump shaft (4) through the first transmission mechanism (1), and in the second working state, the driving shaft (3) drives the oil pump shaft (4) through the second transmission mechanism (2),

the controlled part (5) is mounted on the drive shaft (3) or the engine oil pump shaft (4) in an axially movable and circumferentially lockable manner, the first transmission mechanism (1) is mounted between the drive shaft (3) and the engine oil pump shaft (4) in a bidirectionally idle-rotatable manner by means of a first mounting structure, the second transmission mechanism (2) is mounted between the drive shaft (3) and the engine oil pump shaft (4) in a bidirectionally idle-rotatable manner by means of a second mounting structure, in the first operating state, the controlled part (5) is engaged with the first transmission mechanism (1) so that the drive shaft (3) drives the engine oil pump shaft (4) by means of the first transmission mechanism (1), and the second transmission mechanism (2) is idle-rotated relative to the drive shaft (3) and the engine oil pump shaft (4) by means of the second mounting structure, in the second operating state, the controlled part (5) is disengaged from the first transmission mechanism (1) and is engaged with the second transmission mechanism (2), the first transmission mechanism (1) idles relative to the driving shaft (3) and the engine oil pump shaft (4) through the first mounting structure, the driving shaft (3) drives the engine oil pump shaft (4) through the second transmission mechanism (2),

wherein the first mounting structure comprises a first bearing (8) and the second mounting structure comprises a second bearing (9).

7. The oil pump drive according to claim 6, characterized in that the first transmission mechanism (1) comprises a first transmission member (11) and a second transmission member (12) which are in driving connection with each other, and the second transmission mechanism (2) comprises a third transmission member (21) and a fourth transmission member (22) which are in driving connection with each other, wherein,

the controlled piece (5) is arranged on the engine oil pump shaft (4) and is positioned between the second transmission piece (12) and the fourth transmission piece (22), the first transmission piece (11) is fixedly arranged on the driving shaft (3), the second transmission piece (12) is arranged on the engine oil pump shaft (4) through the first bearing (8), the third transmission piece (21) is fixedly arranged on the driving shaft (3), the fourth transmission piece (22) is arranged on the engine oil pump shaft (4) through the second bearing (9), in the first working state, the controlled piece (5) is connected with the second transmission piece (12), the fourth transmission piece (22) idles on the engine oil pump shaft (4) through the second bearing (9), and in the second working state, the controlled piece (5) is separated from the second transmission piece (12) and is connected with the fourth transmission piece (22), the second transmission piece (12) idles on the engine oil pump shaft (4) through the first bearing (8);

or,

the controlled piece (5) is arranged on the driving shaft (3) and is positioned between the first transmission piece (11) and the third transmission piece (21), the first transmission piece (11) is arranged on the driving shaft (3) through the first bearing (8), the second transmission piece (12) is fixedly arranged on the engine oil pump shaft (4), the third transmission piece (21) is arranged on the driving shaft (3) through the second bearing (9), the fourth transmission piece (22) is fixedly arranged on the engine oil pump shaft (4), in the first working state, the controlled piece (5) is connected with the first transmission piece (11), the third transmission piece (21) idles on the driving shaft (3) through the second bearing (9), and in the second working state, the controlled piece (5) is separated from the first transmission piece (11) and is connected with the third transmission piece (21), the first transmission member (11) is free-wheeling on the drive shaft (3) via the first bearing (8).

8. The oil pump drive according to any one of claims 6-7, characterized in that the first transmission mechanism (1) and the second transmission mechanism (2) are each a gear pair, and the controlled member (5) is a friction wheel mounted by axially extending splines, the friction wheel having a friction end surface frictionally engaging with a gear of the corresponding gear pair.

9. An engine, comprising:

a crankshaft, a balance shaft and an oil pump,

the oil pump drive of any of claims 1-5 or 6-8, a drive shaft (3) of the drive being the crankshaft or the balance shaft; and

and the controller is used for controlling the controlled part (5) to move according to the working condition of the engine.

10. A vehicle characterized by comprising the engine of claim 9.