CN217681904U

CN217681904U - Electric pre-oil supply pump and engine

Info

Publication number: CN217681904U
Application number: CN202221534139.0U
Authority: CN
Inventors: 张志权; 张培杰; 李寒寒; 任利东; 徐凤阳
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-10-28
Anticipated expiration: 2032-06-17

Abstract

The utility model discloses an electronic fuel feed pump and engine in advance, fuel feed pump include driving motor and oil pump in advance, and driving motor includes motor body and output shaft, and the oil pump has the transmission shaft, and the output shaft is provided with the drive worm, and the transmission shaft is provided with driven worm wheel, and driven worm wheel and drive worm cooperation transmission to the restriction transmission shaft drives the output shaft and rotates. The utility model discloses a driving motor's output shaft is provided with the drive worm, and the transmission shaft of oil pump is provided with driven worm wheel, transmits through worm gear mechanism between the two, on the basis of guaranteeing transmission efficiency between the two, utilizes worm gear mechanism's reverse auto-lock characteristic for the transmission of power can only transmit the transmission shaft to the oil pump from driving motor's output shaft, and can't transmit driving motor's output shaft from the transmission shaft of oil pump. Therefore, the phenomenon that the driving motor is driven reversely due to the fact that high-pressure engine oil in the engine impacts the oil pump is avoided, damage to the driving motor is reduced, and the service life is prolonged.

Description

Electric pre-oil supply pump and engine

Technical Field

The utility model belongs to the technical field of the diesel engine is lubricated, concretely relates to electronic fuel feeding pump and engine in advance.

Background

The pre-oil supply pump is one of important parts in an engine system of a vehicle, and is used for conveying oil to an engine lubricating system to lubricate the engine before the engine is started, and forming a layer of oil film on the surface of each part of the engine to reduce mechanical damage.

The pre-oil supply pump generally comprises a motor and an oil pump, and the pre-oil supply pump drives the oil pump to work by utilizing the running of an electric drive motor and inputs oil into an engine. After the engine lubrication finishes, the pre-oil supply pump stops working, the engine starts to run, however, as oil in the engine is more and more, the pressure is gradually increased, the high-pressure oil can reversely impact the oil pump to enable the oil pump to reversely rotate, and then the oil pump drives the motor to run through a transmission structure between the oil pump and the motor.

In order to prevent the engine oil in the engine from reversely impacting and driving the oil pump and the motor to rotate in the prior art, a check valve is generally arranged at an outlet of the oil pump to prevent the engine oil from reversely flowing. However, the check valve has poor reliability in operation, and in practical use, the phenomena of incapability of opening due to clamping stagnation, incapability of closing due to failure of a spring and the like often occur, so that the check valve fails, and the pre-oil supply pump fails to supply pre-oil or fails to return reversely.

Therefore, how to improve the working reliability on the basis of ensuring the non-return effect of the pre-fuel feed pump becomes a problem to be solved urgently in the field.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic fuel feed pump and engine in advance to at least one among the solution above-mentioned technical problem.

The utility model discloses the technical scheme who adopts does:

the utility model provides an electronic fuel feeding pump in advance, includes driving motor and oil pump, driving motor includes motor body and output shaft, the oil pump has the transmission shaft, the output shaft is provided with the drive worm, the transmission shaft is provided with driven worm wheel, driven worm wheel with the drive worm cooperation transmission, in order to restrict the transmission shaft drives the output shaft rotates.

The driving worm and the output shaft are of an integrally formed structure.

The periphery of transmission shaft be provided with driven worm wheel backstop complex backstop arch, the protruding orientation of backstop one side of driven worm wheel still have be used for with the fixed plane of driven worm wheel.

The driving worm and the output shaft are of a split structure, the driving worm is sleeved on the periphery of the output shaft, and the driving worm can move along the axial direction of the output shaft.

The output shaft is provided with at least two driving worms, and the driving worms are arranged at intervals along the axial direction of the output shaft.

The driving motor further comprises a supporting seat for supporting the motor body, the bottom of the supporting seat is of a plane structure, and the supporting seat is provided with a fixing hole.

The bottom of supporting seat still is provided with the shock attenuation buffer layer.

The electric pre-oil supply pump further comprises a dust cover, the dust cover is provided with a dust-proof cavity, and the driving motor and the oil pump are arranged in the dust-proof cavity.

The dust cover includes the cover body and lid, the cover body is equipped with the opening, the lid set up in the opening part, the lid with the cover body rotates the connection, so that the lid can for the cover body rotates in order to open or to close the opening.

The utility model also discloses an engine, including organism and oil pan, the engine still includes foretell electronic fuel feed pump in advance, the oil pump has the oil absorption mouth, the oil absorption mouth with the inside intercommunication of oil pan.

Since the technical scheme is used, the utility model discloses the beneficial effect who gains does:

1. driving motor the output shaft is provided with the drive worm, the oil pump the transmission shaft is provided with driven worm wheel, carries out the transmission through worm gear mechanism between the two, on the basis of guaranteeing the transmission efficiency between the two, utilizes worm gear mechanism's reverse auto-lock characteristic for the transmission of power is only can follow driving motor's output shaft transmits to the transmission shaft of oil pump, and can't follow the transmission shaft of oil pump transmits to driving motor's output shaft. Therefore, the phenomenon that the driving motor is driven reversely due to the fact that high-pressure engine oil in the engine impacts the oil pump is avoided, damage to the driving motor is reduced, and the service life is prolonged. Compared with the mode that a check valve is arranged on the oil pump, the worm and gear transmission mechanism has better reliability and lower failure rate, and reduces the cost of maintenance.

2. As a preferred embodiment of the utility model, the periphery of transmission shaft be provided with driven worm wheel backstop complex backstop is protruding, the protruding orientation of backstop one side of driven worm wheel still have be used for with the fixed plane of driven worm wheel is fixed. In the installation process of the driven worm wheel, the stop protrusion can stop with the driven worm wheel to limit the installation position of the driven worm wheel, meanwhile, the driven worm wheel is reminded of installation in place, the driven worm wheel is sleeved from one end of the transmission shaft, the driven worm wheel is pushed in the axial direction of the transmission shaft until the driven worm wheel abuts against the stop protrusion, the driven worm wheel is installed in place, and meanwhile, the stop protrusion can also prevent the driven worm wheel from sliding along the transmission shaft. When the transmission shaft and the driven worm wheel are fixed, for example, when the transmission shaft and the driven worm wheel are fixed in a welding mode, the periphery of the output shaft and the inner ring of the driven worm wheel can be fixed in a welding mode, the fixing plane of the stopping protrusion and the end face of the driven worm wheel can be fixed in a welding mode, accordingly, the fixing area of the transmission shaft and the driven worm wheel is increased, and the connection strength and the connection stability are improved.

3. As a preferred embodiment of the present invention, the output shaft is provided with at least two of the driving worms, and each of the driving worms are arranged along the axial direction of the output shaft at intervals. The output shaft is provided with a plurality of driving worms, so that the fit clearance can be adjusted by matching different driving worms with the driven worm wheel to meet different transmission requirements, and when one of the driving worms is seriously worn, the position of the driving worm can be adjusted to match the driven worm wheel with other driving worms, so that a better transmission effect is obtained, the driving motor or the output shaft does not need to be replaced, and the cost of maintenance is reduced.

4. As a preferred embodiment of the utility model, driving motor is still including being used for supporting motor body's supporting seat, the bottom of supporting seat still is provided with the shock attenuation buffer layer. The shock absorption buffer layer is arranged, so that shock generated in the working process of the driving motor can be absorbed and buffered, the overall stability of the pre-oil supply pump is improved, meanwhile, the shock transmitted to other parts by the driving motor can be greatly reduced, and the overall shock absorption performance of an engine system is improved.

5. The utility model also discloses an engine, including organism and oil pan, the engine still includes foretell electronic fuel feed pump in advance, the oil pump has the oil absorption mouth, the oil absorption mouth with the inside intercommunication of oil pan. Before the engine works, the pre-oil supply pump starts to work, the oil liquid stored in the oil pan is pumped out and pumped into the engine to lubricate the inside of the engine, so that the working efficiency is improved, and meanwhile, a layer of oil film is formed on the surface of the engine to reduce abrasion. And the oil in the oil pan is utilized for lubrication, so that the oil is recycled, the utilization rate is improved, and the cost is saved. In addition, the driving motor and the oil pump are driven by a worm gear mechanism, and on the basis of ensuring the transmission efficiency between the driving motor and the oil pump, the transmission of power can only be transmitted to the transmission shaft of the oil pump from the output shaft of the driving motor by utilizing the reverse self-locking characteristic of the worm gear mechanism, but cannot be transmitted to the output shaft of the driving motor from the transmission shaft of the oil pump. Therefore, the phenomenon that the driving motor is driven reversely due to the fact that high-pressure engine oil in the engine impacts the oil pump is avoided, damage to the driving motor is reduced, and the service life is prolonged.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a schematic structural view of the electric pre-oil supply pump according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the driving motor and the oil pump according to another embodiment of the present invention.

Wherein:

1 driving a motor; 11 an output shaft; 12 driving the worm; 13 a motor body; 14, supporting a seat; 15 fixing holes; 16 shock absorbing buffer layers;

2, an oil pump; 21 a drive shaft; 22 a driven worm gear; 23 stop projection.

Detailed Description

In order to more clearly explain the overall concept of the present invention, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. In the description herein, references to the terms "embodiment," "an example" or "specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1 to 2, an electric pre-oil supply pump includes a driving motor 1 and an oil pump 2, the driving motor 1 includes a motor body 13 and an output shaft 11, the oil pump 2 has a transmission shaft 21, the output shaft 11 is provided with a driving worm 12, the transmission shaft 21 is provided with a driven worm wheel 22, and the driven worm wheel 22 is in transmission with the driving worm 12 in a matching manner so as to limit the transmission shaft 21 from driving the output shaft 11 to rotate.

Specifically, the helix angle of the driving worm 12 is smaller than the equivalent friction angle between the meshing teeth of the driving worm 12 and the driven worm wheel 22, so as to realize self-locking.

Driving motor 1 output shaft 11 is provided with drive worm 12, oil pump 2 transmission shaft 21 is provided with driven worm wheel 22, transmits through worm gear mechanism between the two, on the basis of guaranteeing transmission efficiency between the two, utilizes worm gear mechanism's reverse auto-lock characteristic for the transmission of power can only be followed driving motor 1's output shaft 11 transmits extremely driving motor 2's transmission shaft 21, and can't follow oil pump 2's transmission shaft 21 transmits extremely driving motor 1's output shaft 11. Therefore, the phenomenon that the driving motor 1 is driven reversely because high-pressure engine oil in the engine impacts the oil pump 2 is avoided, the damage to the driving motor 1 is reduced, and the service life is prolonged. Compared with the mode of arranging the check valve on the oil pump 2, the worm gear transmission mechanism has better reliability and lower failure rate, and reduces the cost of maintenance.

As shown in fig. 1, the driving worm 12 and the driven worm wheel 22 are used for transmission in a matching manner, and the output shaft 11 and the transmission shaft 21 are arranged in a perpendicular state, so that the length of the pre-oil supply pump along the axial direction of the output shaft 11 is reduced, the occupied space is reduced, and the position arrangement of the driving motor 1 and the oil pump 2 is more compact.

It should be noted that, the present invention is not limited to the assembling manner of the driving worm 12 and the output shaft 11, and it may be one of the following embodiments:

the first implementation mode comprises the following steps: the driving worm 12 and the output shaft 11 are integrally formed.

In this embodiment, the driving worm 12 and the output shaft 11 are integrally formed, so that a subsequent assembly process is omitted, and the connection strength between the driving worm 12 and the output shaft 11 is improved. Preferably, the driving worm 12 may be formed by directly machining a worm gear engagement structure on the output shaft 11.

Further, as shown in fig. 2, a stop protrusion 23 which is in stop fit with the driven worm wheel 22 is arranged on the periphery of the transmission shaft 21, and a fixing plane for fixing with the driven worm wheel 22 is further arranged on one side of the stop protrusion 23 facing the driven worm wheel 22.

In the installation process of the driven worm wheel 22, the stopping protrusion 23 can stop the driven worm wheel 22 to limit the installation position of the driven worm wheel 22, and meanwhile, the driven worm wheel 22 is reminded of installation in place, the driven worm wheel 22 is sleeved from one end of the transmission shaft, the driven worm wheel 22 is pushed in the axial direction of the transmission shaft 21 until the driven worm wheel 22 abuts against the stopping protrusion 23, the driven worm wheel 22 is installed in place, and meanwhile, the stopping protrusion 23 can also prevent the driven worm wheel 22 from sliding along the transmission shaft 21. When fixing, for example, when the transmission shaft 21 and the driven worm wheel 22 are welded and fixed, not only the outer periphery of the output shaft 21 and the inner ring of the driven worm wheel 22 can be welded and fixed, but also the fixing plane of the stopper protrusion 23 and the end surface of the driven worm wheel 22 can be welded and fixed, so that the fixing area of the transmission shaft 21 and the driven worm wheel 22 is increased, and the connection strength and the connection stability are improved.

The second embodiment: in the present embodiment, the driving worm 12 and the output shaft 11 are of a split structure, the driving worm 12 is sleeved on the outer circumference of the output shaft 11, and the driving worm 12 is capable of moving along the axial direction of the output shaft 11.

The driving worm 12 and the output shaft 11 are formed separately and can move along the output shaft 11, so that the position of the driving worm 12 on the output shaft 11 can be adjusted, the relative position of the driving worm 12 and the driven worm wheel 22 can be adjusted by adjusting the position of the driving worm 12, the meshing gap can be further changed, and different transmission requirements can be met.

Preferably, the output shaft 11 is provided with at least two driving worms 12, and the driving worms 12 are arranged at intervals along the axial direction of the output shaft 11.

The output shaft 11 is provided with a plurality of driving worms 12, so that on one hand, different driving worms 12 can be matched with the driven worm wheel 22 to adjust the matching clearance, thereby meeting different transmission requirements, and on the other hand, when one of the driving worms 12 is seriously worn, the position of the driving worm 12 can be adjusted, so that the driven worm wheel 22 is matched with the other driving worms 12, thereby obtaining better transmission effect, without replacing the driving motor 1 or the output shaft 11, and reducing the cost of maintenance.

In one embodiment, the outer diameters of the driving worms 12 are different, so that the meshing clearance between the driving worm 12 and the driven worm wheel 22 can be adjusted by matching different driving worms 12 and driven worm wheels 22, thereby improving the applicability.

In another specific embodiment, the outer diameters of the driving worms 12 are the same, so that any one of the driving worms 12 can be matched with the driven worm wheel 22, and when the driving worm 12 is worn to a large extent, the positions of the other driving worms 12 are adjusted to match the driven worm wheel 22 with the other driving worms 12, so that the driving motor 1 or the output shaft 11 does not need to be replaced, and the maintenance cost is reduced.

As a preferred embodiment of the present invention, as shown in fig. 1 and fig. 2, the driving motor 1 further includes a supporting seat 14 for supporting the motor body 13, the bottom of the supporting seat 14 is a planar structure, and the supporting seat 14 is provided with a fixing hole 15.

The supporting seat 14 supports the driving motor 1 and fixes the driving motor 1 in an engine system, so that the stability of the driving motor 1 is improved, the shaking of the driving motor 1 in the working process is reduced, and the sealing performance of an oil path joint is ensured. The arrangement of the fixing hole 15 can enable parts such as bolts to penetrate through the driving motor 1 for fixing, so that the assembly difficulty is reduced, and the installation cost is saved.

Further, as shown in fig. 1 and 2, a shock absorbing buffer layer 16 is further disposed at the bottom of the support seat 14.

The shock absorption buffer layer 16 is arranged, so that the shock generated in the working process of the driving motor 1 can be absorbed and buffered, the overall stability of the pre-oil supply pump is improved, meanwhile, the shock transmitted to other parts by the driving motor 1 can be greatly reduced, and the overall shock absorption performance of an engine system is improved.

In the present embodiment, the structure of the shock absorbing buffer layer 16 is not particularly limited, and may be an elastic rubber layer, a shock absorbing spring, or the like, and is not particularly limited herein.

The utility model discloses an in the preferred embodiment, electronic fuel feed pump in advance still includes the dust cover, the dust cover has dustproof chamber, driving motor 1 with oil pump 2 all arranges in dustproof intracavity.

The dust cover certainly the outside of electronic fuel feed pump in advance encloses the fuel feed pump in advance, with external dust, impurity etc. with driving motor 1 with oil pump 2 separates, avoids the dust to be in worm gear mechanism department piles up, forms the backstop to the rotation of the two and influences transmission efficiency. The cleaning of the drive motor 1, the oil pump 2, and the drive worm 12 and the driven worm wheel 22 is ensured.

Preferably, the dust cover includes a cover body and a cover body, the cover body is provided with an opening, the cover body is arranged at the opening, the cover body is rotatably connected with the cover body, so that the cover body can rotate relative to the cover body to open or close the opening.

The lid rotates to open and shut the opening makes the dust-proof chamber can be opened, the staff accessible the operating condition and the wearing and tearing condition of inside each spare part are observed to the opening, still can pass through simultaneously the opening to worm gear mechanism adds lubricating oil, guarantees lubricating property, improves the convenience of maintenance.

The utility model also discloses an engine, including organism and oil pan, the engine still includes foretell electronic fuel feed pump in advance, oil pump 2 has the oil absorption mouth, the oil absorption mouth with the inside intercommunication of oil pan. Before the engine works, the pre-oil supply pump starts to work, the oil liquid stored in the oil pan is pumped out and pumped into the engine to lubricate the inside of the engine, so that the working efficiency is improved, and meanwhile, a layer of oil film is formed on the surface of the engine to reduce abrasion. And the oil in the oil pan is utilized for lubrication, so that the engine oil is recycled, the utilization rate is improved, and the cost is saved. In addition, the driving motor 1 and the oil pump 2 are driven by a worm gear mechanism, and on the basis of ensuring the driving efficiency between the driving motor 1 and the oil pump 2, the reverse self-locking characteristic of the worm gear mechanism is utilized, so that the power transmission can be only transmitted from the output shaft 11 of the driving motor 1 to the transmission shaft 21 of the oil pump 2, but not from the transmission shaft 21 of the oil pump 2 to the output shaft 11 of the driving motor 1. Therefore, the phenomenon that the driving motor 1 is driven reversely because high-pressure engine oil in the engine impacts the oil pump 2 is avoided, the damage to the driving motor 1 is reduced, and the service life is prolonged.

The utility model can be realized by adopting or using the prior art for reference in places which are not mentioned in the utility model.

All the embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from other embodiments.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides an electronic fuel feed pump in advance, includes driving motor and oil pump, its characterized in that, driving motor includes motor body and output shaft, the oil pump has the transmission shaft, the output shaft is provided with the drive worm, the transmission shaft is provided with driven worm wheel, driven worm wheel with the drive worm cooperation transmission, in order to restrict the transmission shaft drives the output shaft rotates.

2. The electric pre-oil feed pump of claim 1,

the driving worm and the output shaft are of an integrally formed structure.

3. The electric pre-oil feed pump of claim 2,

the periphery of transmission shaft be provided with driven worm wheel backstop complex backstop is protruding, the protruding orientation of backstop one side of driven worm wheel still have be used for with the fixed plane of driven worm wheel.

4. The electric pre-oil supply pump according to claim 1,

5. The electric pre-oil feed pump according to claim 1 or 4,

6. The electric pre-oil feed pump of claim 1,

7. The electric pre-oil supply pump according to claim 6,

8. The electric pre-oil feed pump of claim 1,

9. The electric pre-oil supply pump according to claim 8,

10. An engine, comprising a body and an oil sump, characterized in that,

the engine further comprising an electric pre-feed pump as set forth in any of claims 1-9, said oil pump having an oil intake opening communicating with the interior of said oil pan.