CN211821680U

CN211821680U - Oil pump and engine assembly

Info

Publication number: CN211821680U
Application number: CN201922255222.9U
Authority: CN
Inventors: 张俊龙; 安铭; 刘建卫; 李春锋
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-10-30
Anticipated expiration: 2029-12-16

Abstract

The utility model belongs to the engine field discloses an oil pump and engine assembly, and the oil pump includes the pump case, the tang groove has been seted up respectively around circumference in both ends around the pump case, is located the front end tang inslot cover is equipped with first sealed rubber ring, is located the rear end tang inslot cover is equipped with the sealed rubber ring of second, the external diameter of the sealed rubber ring of second is greater than the external diameter of first sealed rubber ring. The utility model discloses an above-mentioned oil pump sets up the external diameter that is less than the second rubber gasket through the external diameter with first rubber gasket into, when the installation oil pump, there is the clearance between the surface of first rubber gasket and the major diameter section of the mounting hole of installed part, this clearance makes the oil pump pack into the mounting hole or when tearing out from the mounting hole, first rubber gasket can not be cut open by the cross position of oil feed passageway and mounting hole, the passageway of producing oil and mounting hole, and then avoided sealed inefficacy, the performance of oil pump has been improved.

Description

Oil pump and engine assembly

Technical Field

The utility model relates to an engine field especially relates to an oil pump and engine assembly.

Background

The oil pump is the heart of an engine lubricating system and is an important guarantee for the normal running of the engine. In the existing engine assembly, an oil pump of the existing engine assembly needs to be hermetically mounted on a mounting piece, the structure of the existing mounting piece is shown in fig. 1, the mounting piece is provided with a mounting hole 100 for mounting the oil pump, meanwhile, the mounting piece is provided with an oil inlet channel 101 and an oil outlet channel 102 which are communicated with the mounting hole 100, and the oil inlet channel 101 and the mounting hole 100, the oil outlet channel 102 and the mounting hole 100 are all in a cross-shaped cross structure, so that the cross position 103 is relatively sharp. The front end and the rear end of the existing oil pump are provided with sealing rubber rings, when the oil pump is mounted, in the process that the oil pump is mounted in the mounting hole 100, the sealing rubber rings at the front end can be cut by the intersection 103 of the oil inlet channel 101 and the mounting hole 100 and the intersection 103 of the oil outlet channel 102 and the mounting hole 100, so that sealing failure is caused, and the performance of the oil pump is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil pump and engine assembly can avoid the sealed rubber ring of oil pump front end to be cut brokenly, has improved the performance of oil pump.

To achieve the purpose, the utility model adopts the following technical proposal:

an oil pump comprises a pump shell, wherein the front end and the rear end of the pump shell are respectively provided with a spigot groove around the circumferential direction, a first sealing rubber ring is sleeved in the spigot groove at the front end, a second sealing rubber ring is sleeved in the spigot groove at the rear end, and the outer diameter of the second sealing rubber ring is larger than that of the first sealing rubber ring.

Preferably, the pump further comprises a driving shaft assembly arranged in the pump shell, one end of the driving shaft assembly penetrates through the pump shell, and the axis of the driving shaft assembly is overlapped with the central line of the pump shell.

Preferably, the driving gear is mounted at one end of the driving shaft assembly penetrating through the pump shell, and the driving gear is concentric with the excircle of the spigot groove.

Preferably, the driving gear fixing device further comprises a nut, wherein the nut is connected to one end, penetrating through the pump shell, of the driving shaft assembly in a threaded mode and is used for fixing the driving gear.

Preferably, an installation cavity is formed in the pump shell, an oil inlet and an oil outlet communicated with the installation cavity are formed in the pump shell, and the driving shaft assembly penetrates through the installation cavity.

Preferably, grooves are formed in the two sides of the pump shell along the circumferential direction, the oil inlet is formed in the groove bottom of one groove, and the oil outlet is formed in the groove bottom of the other groove.

Preferably, the arc length of the groove is greater than or equal to one third of the circumference of the pump casing outer contour and less than one half of the circumference of the pump casing outer contour.

Preferably, the oil pressure control device further comprises a pilot-operated overflow valve, and the pilot-operated overflow valve is configured to communicate the groove provided with the oil inlet with the groove provided with the oil outlet when the oil pressure at the oil inlet exceeds a preset value.

Preferably, the groove provided with the oil inlet is communicated with the groove provided with the oil outlet through a through hole, and a valve core of the pilot overflow valve penetrates through the through hole and can plug the through hole.

The utility model also provides an engine assembly, including installed part and foretell oil pump, the mounting hole has been seted up on the installed part, the mounting hole is the shoulder hole structure, the first sealed rubber ring sealing connection of oil pump in the path section of mounting hole, the second sealed rubber ring sealing connection of oil pump in the big footpath section of mounting hole, the big footpath section intercommunication of installed part has oil feed passageway and the passageway that produces oil.

The utility model has the advantages that: by setting the outer diameter of the first sealing rubber ring to be smaller than that of the second sealing rubber ring, when the oil pump is installed, a gap exists between the outer surface of the first sealing rubber ring and the large-diameter section of the installation hole of the installation part, and when the oil pump is installed in the installation hole or detached from the installation hole due to the gap, the first sealing rubber ring cannot be cut by the intersection positions of the oil inlet channel and the installation hole and the oil outlet channel and the installation hole, so that sealing failure is avoided, and the performance of the oil pump is improved.

Drawings

FIG. 1 is a schematic view of a prior art mount;

FIG. 2 is a schematic diagram of an engine assembly provided by the present disclosure;

fig. 3 is a schematic perspective view of the oil pump provided by the present invention;

fig. 4 is a side view of the oil pump provided by the present invention;

FIG. 5 is a schematic view of the matching structure between the driving shaft assembly and the driven shaft assembly

Fig. 6 is a schematic view of a pump housing according to the present invention;

fig. 7 is a schematic view of another perspective of the pump housing provided by the present invention.

In the figure:

1. a pump housing; 11. a spigot groove; 12. a mounting cavity; 13. an oil inlet; 14. an oil outlet; 15. a groove; 16. a first connection chamber; 17. a second connection chamber; 2. a first sealing rubber ring; 3. a second sealing rubber ring; 4. a drive shaft assembly; 41. a driving gear; 5. a drive gear; 6. a nut; 7. a pilot operated relief valve; 8. a driven shaft assembly; 81. a driven gear; 9. a first pump cover; 10', a second pump cover; 10. an oil pump; 20. a mounting member; 201. mounting holes; 202. an oil inlet channel; 203. an oil outlet channel;

100. mounting holes; 101. an oil inlet channel; 102. an oil outlet channel; 103. the position of the intersection.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; 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 in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides an engine assembly, as shown in FIG. 2, this engine assembly includes oil pump 10 and installed part 20, has seted up mounting hole 201 on installed part 20, and mounting hole 201 intercommunication has oil feed passageway 202 and oil outlet passageway 203. Above-mentioned mounting hole 201 is the shoulder hole structure, and above-mentioned oil feed passageway 202 and oil outlet passageway 203 all communicate with the major diameter section of mounting hole 201. In this embodiment, two mounting holes 201 may be provided, two corresponding oil inlet passages 202 and two corresponding oil outlet passages 203 are also provided, and one oil pump 10 is installed in each mounting hole 201.

As shown in fig. 3 and 4, the oil pump 10 includes a pump housing 1, a first sealing rubber ring 2, a second sealing rubber ring 3, a driving shaft assembly 4, a driving gear 5, a nut 6, a pilot overflow valve 7, a driven shaft assembly 8, a first pump cover 9, and a second pump cover 10', wherein the first sealing rubber ring 2 and the second sealing rubber ring 3 are respectively sleeved at two ends of the pump housing 1, the driving shaft assembly 4 is provided with a driving gear 41, the driven shaft assembly 8 is provided with a driven gear 81 (shown in fig. 5) engaged with the driving gear 41, the driving shaft assembly 4 and the driven shaft assembly 8 are both disposed in the pump housing 1, and an axis of the driving shaft assembly 4 coincides with a center line of the pump housing 1. The first pump cover 9 and the second pump cover 10' are respectively fixed at both ends of the pump case 1, one end of the driving shaft assembly 4 is disposed through the first pump cover 9, and the driving gear 5 is fixed at the one end. The above-described pilot-operated relief valve 7 is attached to the second pump cover 10'.

In this embodiment, as shown in fig. 6, an installation cavity 12 is disposed inside the pump housing 1, an oil inlet 13 and an oil outlet 14 communicated with the installation cavity 12 are disposed on the pump housing 1, the driving shaft assembly 4 and the driven shaft assembly 8 are disposed in the installation cavity 12, and both ends of the driving shaft assembly and the driven shaft assembly are rotatably connected to the first pump cover 9 and the second pump cover 10'.

Alternatively, grooves 15 may be circumferentially provided on both sides of the pump casing 1, one of the grooves 15 being adapted to communicate with an oil inlet passage 202 provided in the mounting member 20 (a part of the engine assembly), and the oil inlet 13 being provided at a bottom of the groove 15. The other groove 15 is used for communicating with the oil outlet channel 203 of the oil pump 10, and the oil outlet 14 is arranged at the bottom of the groove 15. The width of the groove 15 is slightly less than the width of the whole pump casing 1, and the arc length of the groove 15 is more than or equal to one third of the circumference of the outer contour line of the pump casing 1 and less than one half of the circumference of the outer contour line of the pump casing 1. The arrangement of the structure can ensure that the oil inlet channel 202 and the oil outlet channel 203 of the mounting part 20 can be communicated with the groove 15, and further the communication between the oil inlet channel 202 and the oil inlet 13 and the communication between the oil outlet channel 203 and the oil outlet 14 are also realized. And the structure of the groove 15 is arranged, when the positions of the oil inlet channel 202 and the oil outlet channel 203 of the mounting part 20 are changed, the oil pump 10 with the groove 15 can still be communicated with the oil inlet channel 202 and the oil outlet channel 203, so that the application range of the oil pump 10 is wider.

In this embodiment, the arc length of the groove 15 is not less than the arc lengths of the oil inlet 13 and the oil outlet 14, so that it is ensured that the oil in the oil inlet channel 202 can completely enter the oil inlet 13 through the groove 15, and the oil flowing out from the oil outlet 14 completely flows into the oil outlet channel 203 through the groove 15.

Alternatively, the widths of the oil inlet 13 and the oil outlet 14 are not larger than the width of the driving gear 41 of the driving shaft assembly 4, so that all the oil can be pumped out through the meshing rotation of the driving gear 41 and the driven gear 81, and the optimal operation state of the oil pump 10 can be achieved. In this embodiment, the width of the drive gear 41 is the same as the width of the driven gear 81.

In this embodiment, the front end and the rear end of the pump case 1 are respectively provided with a spigot groove 11 around the circumferential direction, the first sealing rubber ring 2 is sleeved in the spigot groove 11 at the front end and sealed with the small diameter section of the mounting hole 201, and the second sealing rubber ring 3 is sleeved in the spigot groove 11 at the rear end and sealed with the large diameter section of the mounting hole 201. Through the setting of this tang groove 11, can be convenient for the installation of first rubber packing ring 2 and second rubber packing ring 3. Preferably, the cross section of the stop groove 11 is rectangular or semicircular, and the cross sections of the first and second packing rings 2 and 3 are circular.

Optionally, the outer diameter of the first sealing rubber ring 2 is smaller than the outer diameter of the second sealing rubber ring 3, so that when the oil pump 10 is installed, a gap exists between the outer surface of the first sealing rubber ring 2 and the large-diameter section of the installation hole 201 of the installation part 20, and when the oil pump 10 is installed in the installation hole 201 or removed from the installation hole 201 through the gap, the first sealing rubber ring 2 cannot be cut by the intersection positions of the oil inlet channel 202 and the installation hole 201, and the oil outlet channel 203 and the installation hole 201, so that sealing failure is avoided, and the performance of the oil pump 10 is improved.

As the preferred technical scheme, the driving gear 5 is concentric with the excircle of the spigot groove 11, the structure can more conveniently position the axis of the driving gear 5, and further ensure the accurate positioning of the installation of the driving gear 5, and compared with the existing positioning mode through a positioning pin, the positioning of the embodiment is more accurate and reduces parts.

Further, the oil pump 10 further comprises a nut 6, and the nut 6 is screwed to one end of the driving shaft assembly 4 penetrating through the pump housing 1 and is used for fixing the driving gear 5.

In this embodiment, the above-mentioned pilot-operated overflow valve 7 is used for communicating the groove 15 provided with the oil inlet 13 with the groove 15 provided with the oil outlet 14 when the oil pressure at the oil inlet 13 exceeds a preset value, so that the structure of the whole oil pump 10 is compact, and the purpose of saving power consumption can be achieved.

Alternatively, as shown in fig. 6 and 7, a first connection chamber 16 and a second connection chamber 17 may be provided on the pump housing 1, a through hole is provided between the first connection chamber 16 and the second connection chamber 17 and is communicated through the through hole, the first connection chamber 16 is communicated with the groove 15 provided with the oil inlet 13, the second connection chamber 17 is communicated with the groove 15 provided with the oil outlet 14, and the valve element of the pilot relief valve 7 is disposed through the through hole and is capable of plugging the through hole to disconnect the communication between the first connection chamber 16 and the second connection chamber 17. When the pressure of the oil in the groove 15 provided with the oil inlet 13 exceeds a preset value, the valve core of the pilot-operated overflow valve 7 moves, the through hole is opened, the first connecting cavity 16 is communicated with the second connecting cavity 17, and the oil in the groove 15 provided with the oil inlet 13 can enter the second connecting cavity 17 through the first connecting cavity 16, so that the pressure relief in the groove 15 provided with the oil inlet 13 is realized. After the pressure relief is finished, the valve core of the pilot-operated overflow valve 7 is reset, the through hole is blocked, and the communication between the first connecting cavity 16 and the second connecting cavity 17 is disconnected. Through the pilot overflow valve 7, the service performance of the oil pump 10 and the utilization rate of oil are improved, and energy conservation and consumption reduction are realized.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The engine oil pump (10) is characterized by comprising a pump shell (1), wherein the front end and the rear end of the pump shell (1) are respectively provided with a spigot groove (11) around the circumferential direction, the spigot groove (11) at the front end is internally sleeved with a first sealing rubber ring (2), the spigot groove (11) at the rear end is internally sleeved with a second sealing rubber ring (3), and the outer diameter of the second sealing rubber ring (3) is larger than that of the first sealing rubber ring (2).

2. The oil pump (10) of claim 1, further comprising a drive shaft assembly (4) disposed within the pump housing (1), wherein one end of the drive shaft assembly (4) is disposed through the pump housing (1), and an axis of the drive shaft assembly (4) coincides with a center line of the pump housing (1).

3. The oil pump (10) of claim 2, further comprising a drive gear (5) mounted to an end of the drive shaft assembly (4) that passes through the pump housing (1), the drive gear (5) being concentric with an outer circumference of the spigot groove (11).

4. The oil pump (10) of claim 3, further comprising a nut (6), wherein the nut (6) is threadedly connected to one end of the drive shaft assembly (4) penetrating through the pump housing (1) for fixing the drive gear (5).

5. The oil pump (10) of any one of claims 2 to 4, wherein a mounting cavity (12) is arranged inside the pump housing (1), an oil inlet (13) and an oil outlet (14) communicated with the mounting cavity (12) are formed in the pump housing (1), and the driving shaft assembly (4) is arranged in the mounting cavity (12) in a penetrating manner.

6. The oil pump (10) of claim 5, characterized in that grooves (15) are circumferentially formed in both sides of the pump housing (1), the oil inlet (13) is formed in the bottom of one of the grooves (15), and the oil outlet (14) is formed in the bottom of the other groove (15).

7. The oil pump (10) of claim 6, characterized in that the arc length of the groove (15) is greater than or equal to one third of the circumference of the outer contour of the pump housing (1) and less than one half of the circumference of the outer contour of the pump housing (1).

8. The oil pump (10) of claim 6, further comprising a pilot operated spill valve (7), the pilot operated spill valve (7) being configured to communicate the recess (15) opening the oil inlet (13) with the recess (15) opening the oil outlet (14) when the oil pressure at the oil inlet (13) exceeds a preset value.

9. The oil pump (10) of claim 8, wherein the groove (15) provided with the oil inlet (13) communicates with the groove (15) provided with the oil outlet (14) via a through hole, and a spool of the pilot operated relief valve (7) is disposed through the through hole and can close the through hole.

10. An engine assembly, characterized by comprising a mounting member (20) and the oil pump (10) according to any one of claims 1 to 9, wherein the mounting member (20) is provided with a mounting hole (201), the mounting hole (201) is of a stepped hole structure, a first sealing rubber ring (2) of the oil pump (10) is hermetically connected to a small-diameter section of the mounting hole (201), a second sealing rubber ring (3) of the oil pump (10) is hermetically connected to a large-diameter section of the mounting hole (201), and the large-diameter section of the mounting member (20) is communicated with an oil inlet passage (202) and an oil outlet passage (203).