Oil pump and engine

Abstract

The invention provides an oil pump and an engine. The oil pump comprises a shell and a plurality of gears arranged in the shell, and the gears are sequentially arranged in the preset direction and engaged; the plurality of gears comprise a gear unit, and the gear unit comprises two adjacent gears; one gear unit corresponds to one oil passing port group, each oil passing port group comprises two oil inlets and one oil outlet, the two oil inlets of each oil passing port group are located in the first side or the second side of the shell, and the oil outlets of the oil passing port groups are located in the second side or the first side of the shell; the two oil inlets of each oil through port group are arranged in one-to-one correspondence with the two gears of the corresponding gear unit, so that the corresponding oil inlet of the corresponding oil through port group absorbs oil into the shell under the rotation action of each gear of the gear unit; the oil outlets of the oil passing port groups are arranged between the two gears of the corresponding gear units; teeth of each gear make contact with the inner wall of the shell, so that the two oil inlets of the oil passing port set do not communicate with each other and do not affect each other.

Description

Technical Field

[0001] This invention relates to the field of oil pump technology, and more specifically, to an oil pump and an engine. Background Technology

[0002] Diesel engine oil pumps need to draw oil from multiple locations; for example, drawing oil from two locations.

[0003] like Figure 1 As shown, the existing oil pump has two gears 2 inside the housing 1, and only one oil suction port 3 and one oil outlet port 4 are provided on the housing 1. The two oil suction ports are achieved through the two branches of the oil suction pipe 5. However, when one of the oil suction ports of the first branch pipe 51 and the second branch pipe 52 is higher than the oil level and draws in air, the other oil suction port will also be unable to draw in oil, causing the oil pump to malfunction.

[0004] For example, when the oil suction port of the first branch pipe 51 is higher than its corresponding oil level and draws in air, the pressure inside the second branch pipe 52 will be greater than its corresponding external oil level pressure, which will disrupt the negative pressure of the second branch pipe 52. Consequently, the oil suction port of the second branch pipe 52 will also be unable to draw in engine oil, meaning the oil pump will not work properly. Summary of the Invention

[0005] The main objective of this invention is to provide an oil pump and an engine to solve the problem of mutual interference between the two oil inlet ports of the oil pump in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, an oil pump is provided, comprising a housing and a plurality of gears disposed within the housing, the plurality of gears being sequentially arranged and meshing along a predetermined direction; the plurality of gears comprising gear units, each gear unit comprising two adjacent gears; the housing having a first side and a second side disposed opposite to each other, the distribution direction of the first side and the second side of the housing being perpendicular to the predetermined direction; one gear unit corresponding to one oil inlet group, the oil inlet group comprising two oil inlets and one oil outlet, the two oil inlets of the oil inlet group being located on the first side or the second side of the housing, and the oil outlet of the oil inlet group being located on the second side or the first side of the housing; the two oil inlets of the oil inlet group are respectively disposed in one-to-one correspondence with the two gears of the corresponding gear unit, so that under the rotation of each gear of the gear unit, the corresponding oil inlet of the corresponding oil inlet group draws oil into the housing; the oil outlet of the oil inlet group is disposed between the two gears of the corresponding gear unit; the teeth of each gear contact the inner wall of the housing, so that the two oil inlets of the oil inlet group are not connected.

[0007] In some embodiments, there is one gear unit, and the oil pump includes two gears.

[0008] In some embodiments, the plurality of gear units are provided; any three adjacent gears in the plurality of gears are a first gear, a second gear and a third gear, respectively, the first gear and the second gear form a gear unit, and the second gear and the third gear form a gear unit; the plurality of oil passage groups are provided; any two adjacent oil passage groups are a first oil passage group and a second oil passage group; the two oil inlets of the first oil passage group are located on the first side of the housing, and the oil outlet of the first oil passage group is located on the second side of the housing; the two oil inlets of the second oil passage group are located on the second side of the housing, and the oil outlet of the second oil passage group is located on the first side of the housing.

[0009] In some embodiments, the inner wall of the housing comprises a first inner wall segment located on both sides of each oil inlet; during the rotation of each gear, the first inner wall segment on each side of each oil inlet of the oil passage group is in contact with one or two teeth of the corresponding gear of the corresponding gear unit.

[0010] Optionally, the first inner wall segment is arc-shaped, and the center axis of the first inner wall segment on each side of each oil inlet of the oil passage group coincides with the center axis of the corresponding gear of the corresponding gear unit.

[0011] In some embodiments, the inner wall of the housing comprises a second inner wall segment located on both sides of the oil outlet, and the two second inner wall segments on both sides of the oil outlet of the oil passage group are arranged one-to-one with the two gears of the corresponding gear unit, respectively; during the rotation of each gear, the second inner wall segment on each side of the oil outlet of the oil passage group is in contact with at least one tooth of the corresponding gear of the corresponding gear unit.

[0012] Optionally, the second inner wall segment is arc-shaped, and the center axis of the second inner wall segment on both sides of the oil outlet of the oil passage group coincides with the center axis of the two gears of the corresponding gear unit one-to-one.

[0013] In some embodiments, a connecting pipe is connected to the oil inlet.

[0014] Optionally, the connecting pipe comprises a main pipe segment and a flared segment, the first end of the main pipe segment is connected to and communicates with the oil inlet, the first end of the flared segment is connected to and communicates with the second end of the main pipe segment, and the second end of the flared segment is used for oil absorption; in the direction from the first end to the second end of the flared segment, the cross section of the lumen of the flared segment gradually increases.

[0015] According to another aspect of the present application, an engine is provided, which comprises the oil pump described above.

[0016] By applying the technical solution of the present application, the oil pump comprises a housing and a plurality of gears arranged in the housing, the plurality of gears in the housing are arranged in sequence along a predetermined direction and meshed, that is, any two adjacent gears in the housing are meshed, and the rotation directions of the two adjacent meshed gears are opposite.

[0017] The plurality of gears in the housing comprises gear units, and each gear unit comprises two adjacent gears.

[0018] One gear unit corresponds to one oil port group. The oil port group comprises two inlet ports and one outlet port. In one oil port group, the two inlet ports are located on the first side or the second side of the housing, and the outlet port is located on the second side or the first side of the housing, i.e. the two inlet ports are located on the same side of the housing, and the outlet port is located on the other side of the housing.

[0019] The two inlet ports of the oil port group are arranged one-to-one with the two gears of the corresponding gear unit, so that under the rotation of each gear of the gear unit, the corresponding inlet port of the corresponding oil port group is used to suck oil into the housing, and the oil enters the pump cavity. The outlet port of the oil port group is arranged between the two gears of the corresponding gear unit, and as the gears rotate, the oil in the pump cavity is transported to the outlet port of the oil port group, and then sent out through the outlet port.

[0020] The teeth of each gear are in contact with the inner wall of the housing, so that the two inlet ports of the oil port group are not communicated with each other, thereby not affecting each other.

[0021] In the oil pump of the present application, each inlet port is independent, so that even if one of the inlet ports is higher than the corresponding oil level and sucks air, it will not affect the other inlet ports, and the other inlet ports can still suck oil normally. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings accompanying the specification of the present application serve to provide further understanding of the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 A structural schematic diagram of an existing oil pump which realizes two oil suction ports through two branch pipes of an oil suction pipe is shown;

[0024] Figure 2 A structural schematic diagram of an oil pump with one gear unit according to the present application is shown;

[0025] Figure 3 A structural schematic diagram of the oil pump in Figure 2 after the connecting pipe is removed is shown;

[0026] Figure 4 A structural schematic diagram of an oil pump with two gear units according to the present application is shown.

[0027] In the above drawings, the following reference signs are included:

[0028] 1, housing; 2, gear; 3, oil suction port; 4, oil outlet; 5, oil suction pipe; 51, first branch pipe; 52, second branch pipe;

[0029] 10, housing; 101, first inner wall segment; 102, second inner wall segment;

[0030] 111, first preset wall segment; 112, second preset wall segment; 113, third preset wall segment; 114, fourth preset wall segment;

[0031] 121, first wall segment; 122, second wall segment; 123, third wall segment; 124, fourth wall segment; 125, fifth wall segment; 126, sixth wall segment; 127, seventh wall segment; 128, eighth wall segment;

[0032] 20, gear;

[0033] 211, first gear; 212, second gear; 213, third gear;

[0034] 221, first preset gear; 222, second preset gear;

[0035] 30, oil inlet;

[0036] 311, first oil inlet; 312, second oil inlet; 313, third oil inlet; 314, fourth oil inlet;

[0037] 321, first preset oil inlet; 322, second preset oil inlet;

[0038] 33, connecting pipe; 331, main pipe segment; 332, flared segment;

[0039] 40, oil outlet; 41, first oil outlet; 42, second oil outlet. DETAILED DESCRIPTION

[0040] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0041] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0042] It is to be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0043] The present application provides an oil pump, please refer to Figures 2 to 4 The oil pump comprises a housing 10 and a plurality of gears 20 arranged in the housing 10, the plurality of gears 20 in the housing 10 are arranged in sequence along a preset direction and meshed, that is, any two adjacent gears 20 in the housing 10 are meshed, and the rotation directions of the two adjacent meshed gears 20 are opposite. The gear 20 is also called a pump oil gear.

[0044] The plurality of gears 20 in the housing 10 comprises a gear unit, and the gear unit comprises two adjacent gears 20.

[0045] The housing 10 has a first side and a second side arranged oppositely, and the distribution directions of the first side and the second side of the housing 10 are perpendicular to the preset direction.

[0046] One gear unit corresponds to one oil port group. The oil port group comprises two oil inlets 30 and one oil outlet 40. In one oil port group, the two oil inlets 30 are located on the first side or the second side of the housing 10, and the oil outlet 40 is located on the second side or the first side of the housing 10, that is, the two oil inlets 30 are located on the same side of the housing 10, and the oil outlet 40 is located on the other side of the housing 10.

[0047] The two oil inlets 30 of the oil port group are arranged one by one corresponding to the two gears 20 of the corresponding gear unit, so that under the rotation of each gear 20 of the gear unit, the corresponding oil inlet 30 of the corresponding oil port group is sucked into the housing 10, and the oil enters the pump oil cavity. The oil outlet 40 of the oil port group is arranged between the two gears 20 of the corresponding gear unit, and with the rotation of the gears 20, the oil in the pump oil cavity is transported to the oil outlet 40 of the oil port group, and then is sent out through the oil outlet 40.

[0048] The teeth of each gear 20 are in contact with the inner wall of the housing 10, so that the two oil inlets 30 of the oil port group are not communicated with each other, thereby not affecting each other.

[0049] In the oil pump of the present application, each oil inlet 30 is independent, that is, even if one of the oil inlets 30 is higher than the corresponding oil level and sucks air, it will not affect the other oil inlets 30, and the other oil inlets 30 can still suck oil normally.

[0050] In the present application, the gear unit is one or more.

[0051] In this application, the inner wall of the housing 10 includes a first inner wall segment 101 located on both sides of each oil inlet 30, that is, for each oil inlet 30, there is a first inner wall segment 101 on both sides. During the rotation of each gear 20, the first inner wall segment 101 on each side of each oil inlet 30 of the oil port group contacts one or two teeth of the corresponding gear 20 of the corresponding gear unit to ensure the independence of each oil inlet 30, that is, to ensure that the two oil inlets 30 of the oil port group are not connected.

[0052] Specifically, the first inner wall section 101 is arc-shaped, and the central axis of the first inner wall section 101 on each side of each oil inlet 30 of the oil inlet group coincides with the central axis of the corresponding gear 20 of the corresponding gear unit.

[0053] In this application, the inner wall of the housing 10 includes second inner wall sections 102 located on both sides of the oil outlet 40. The two second inner wall sections 102 on both sides of the oil outlet 40 of the oil port group are respectively arranged in a one-to-one correspondence with the two gears 20 of the corresponding gear unit. During the rotation of each gear 20, the second inner wall section 102 on each side of the oil outlet 40 of the oil port group contacts at least one tooth of the corresponding gear 20 of the corresponding gear unit to ensure the independence of the oil outlet 40.

[0054] Specifically, the second inner wall section 102 is arc-shaped, and the central axis of the second inner wall section 102 on both sides of the oil outlet 40 of the oil port group corresponds to and coincides with the central axis of the two gears 20 of the corresponding gear unit. That is, the central axis of the second inner wall section 102 on each side of the oil outlet 40 of the oil port group coincides with the central axis of the corresponding gear 20 of the corresponding gear unit.

[0055] Optionally, in this application, a connecting pipe 33 is connected to the oil inlet 30.

[0056] Optionally, the connecting pipe 33 includes a main pipe section 331 and a flared section 332. The first end of the main pipe section 331 is connected to and communicates with the oil inlet 30, and the first end of the flared section 332 is connected to and communicates with the second end of the main pipe section 331. The second end of the flared section 332 is used for oil suction. From the first end to the second end of the flared section 332, the cross-section of the lumen of the flared section 332 gradually increases.

[0057] Optionally, in this application, the oil outlet 40 is used to communicate with the interior of the external oil tank so that the oil flowing out from the oil outlet 40 enters the external oil tank.

[0058] This application also provides an engine that includes the aforementioned oil pump. Optionally, the engine is a diesel engine, and the oil pump is a diesel engine oil pump.

[0059] An oil pump is used to draw oil from the oil pan of an engine.

[0060] Example 1

[0061] In this embodiment, as Figure 2 and Figure 3 As shown, there is one gear unit; this embodiment is used to further describe the case where there is only one gear unit.

[0062] Specifically, the oil pump includes two gears 20, and the distribution direction of the first and second sides of the housing 10 is perpendicular to the distribution direction of the two gears 20; the two gears 20 are a first preset gear 221 and a second preset gear 222, respectively.

[0063] Specifically, there is one oil inlet assembly, that is, the oil pump includes two oil inlets 30 and one oil outlet 40; the oil pump in this embodiment is a two-inlet oil pump, which can draw oil from the two oil inlets 30 respectively.

[0064] like Figure 2 and Figure 3 As shown, the second side of the housing 10 is provided with two oil inlets 30, namely a first preset oil inlet 321 and a second preset oil inlet 322; the first preset gear 221 corresponds to the first preset oil inlet 321, so that the first preset oil inlet 321 draws oil into the housing 10 under the rotation of the first preset gear 221; the second preset gear 222 corresponds to the second preset oil inlet 322, so that the second preset oil inlet 322 draws oil into the housing 10 under the rotation of the second preset gear 222.

[0065] The inner wall of the housing 10 includes a first preset wall section 111, a second preset wall section 112, a third preset wall section 113, and a fourth preset wall section 114. The first preset wall section 111 includes a first inner wall section 101 on one side of the first preset oil inlet 321, the second preset wall section 112 is the first inner wall section 101 on the other side of the first preset oil inlet 321, the third preset wall section 113 is the first inner wall section 101 on one side of the second preset oil inlet 322, and the fourth preset wall section 114 includes the first inner wall section 101 on the other side of the second preset oil inlet 322.

[0066] The first preset wall section 111 includes a second inner wall section 102 on one side of the oil outlet 40, and the fourth preset wall section 114 includes a second inner wall section 102 on the other side of the oil outlet 40.

[0067] The second end of the first preset wall section 111 and the first end of the second preset wall section 112 are respectively located on both sides of the first preset oil inlet 321. The second end of the second preset wall section 112 is connected to the first end of the third preset wall section 113. The second end of the third preset wall section 113 and the second end of the fourth preset wall section 114 are respectively located on both sides of the second preset oil inlet 322. The first end of the first preset wall section 111 and the first end of the fourth preset wall section 114 are respectively located on both sides of the oil outlet 40.

[0068] Multiple teeth of the first preset gear 221 contact the first preset wall segment 111, and multiple teeth of the second preset gear 222 contact the fourth preset wall segment 114.

[0069] During the rotation of the first preset gear 221, the second preset wall segment 112 contacts one or two teeth of the first preset gear 221 to ensure the independence of the first preset oil inlet 321. Specifically, one tooth of the first preset gear 221 may slide out of the second preset wall segment 112 while the next tooth of the first preset gear 221 slides into the second preset wall segment 112; or, one tooth of the first preset gear 221 may be about to slide out of the second preset wall segment 112 while the next tooth of the first preset gear 221 has already slid into the second preset wall segment 112. The engagement between the third preset wall segment 113 and the second preset gear 222 is similar and will not be described further. This ensures that the first preset oil inlet 321 and the second preset oil inlet 322 are not connected.

[0070] The first preset wall segment 111, the second preset wall segment 112, the third preset wall segment 113, and the fourth preset wall segment 114 are all arc-shaped; the central axis of the first preset wall segment 111 and the central axis of the second preset wall segment 112 coincide with the central axis of the first preset gear 221, and the central axis of the third preset wall segment 113 and the central axis of the fourth preset wall segment 114 coincide with the central axis of the second preset gear 222.

[0071] The second preset wall section 112 and the third preset wall section 113 are set at an angle.

[0072] The first preset gear 221 rotates clockwise, and the second preset gear 222 rotates counterclockwise.

[0073] Example 2

[0074] In this embodiment, there are multiple gear units; this embodiment is used to further describe the case where there are multiple gear units.

[0075] Specifically, the oil pump includes three or more gears 20. Among the multiple gears 20 of the oil pump, any three adjacent gears are a first gear 211, a second gear 212, and a third gear 213, respectively. The first gear 211 and the second gear 212 form a gear unit, and the second gear 212 and the third gear 213 form a gear unit.

[0076] Specifically, there are multiple oil inlet groups, and any two adjacent oil inlet groups are respectively the first oil inlet group and the second oil inlet group; the two oil inlets 30 of the first oil inlet group are located on the first side of the housing 10, and the oil outlet 40 of the first oil inlet group is located on the second side of the housing 10; the two oil inlets 30 of the second oil inlet group are located on the second side of the housing 10, and the oil outlet 40 of the second oil inlet group is located on the first side of the housing 10.

[0077] Specifically, the two inlets 30 of the first oil port group are a first oil inlet 311 and a second oil inlet 312. The first oil inlet 311 is located on the side of the second oil inlet 312 away from the oil outlet 40 of the second oil port group; the second oil inlet 312 and the oil outlet 40 of the second oil port group are necessarily not connected. The two inlets 30 of the second oil port group are a third oil inlet 313 and a fourth oil inlet 314. The third oil inlet 313 is located on the side of the fourth oil inlet 314 away from the oil outlet 40 of the first oil port group; the fourth oil inlet 314 and the oil outlet 40 of the first oil port group are necessarily not connected.

[0078] Specifically, in the first oil inlet assembly, the first oil inlet 311 corresponds to the first gear 211, so that the first oil inlet 311 draws oil into the housing 10 under the rotation of the first gear 211; the second oil inlet 312 corresponds to the second gear 212, so that the second oil inlet 312 draws oil into the housing 10 under the rotation of the second gear 212.

[0079] In the second oil inlet assembly, the third oil inlet 313 corresponds to the third gear 213, so that the third oil inlet 313 draws oil into the housing 10 under the rotation of the third gear 213; the fourth oil inlet 314 corresponds to the second gear 212, so that the fourth oil inlet 314 draws oil into the housing 10 under the rotation of the second gear 212.

[0080] The oil outlet 40 of the first oil port group is the first oil outlet 41, and the oil outlet 40 of the second oil port group is the second oil outlet 42.

[0081] like Figure 4As shown, taking an oil pump including three gears 20 as an example, the inner wall of the housing 10 includes a first wall section 121, a second wall section 122, a third wall section 123, a fourth wall section 124, a fifth wall section 125, a sixth wall section 126, a seventh wall section 127, and an eighth wall section 128; the first wall section 121 includes a first inner wall section 101 on one side of the first oil inlet 311, and the second wall section 122 is the first inner wall section 101 on the other side of the first oil inlet 311; the third wall section 123 is the first inner wall section 101 on one side of the second oil inlet 312, and the fourth wall section 124 is the first inner wall section 101 on the other side of the second oil inlet 312; the fourth wall section 124 is also the second oil outlet... The second inner wall section 102 on one side of the second oil outlet 42, the fifth wall section 125 includes the second inner wall section 102 on the other side of the second oil outlet 42; the fifth wall section 125 includes the first inner wall section 101 on one side of the third oil inlet 313, the sixth wall section 126 is the first inner wall section 101 on the other side of the third oil inlet 313; the seventh wall section 127 is the first inner wall section 101 on one side of the fourth oil inlet 314, the eighth wall section 128 is the first inner wall section 101 on the other side of the fourth oil inlet 314; the eighth wall section 128 is also the second inner wall section 102 on one side of the first oil outlet 41, and the first wall section 121 includes the second inner wall section 102 on the other side of the first oil outlet 41.

[0082] The second end of the first wall section 121 and the first end of the second wall section 122 are located on both sides of the first oil inlet 311. The second end of the second wall section 122 is connected to the first end of the third wall section 123. The second end of the third wall section 123 and the first end of the fourth wall section 124 are located on both sides of the second oil inlet 312. The second end of the fourth wall section 124 and the second end of the fifth wall section 125 are located on both sides of the second oil outlet 42. The first end of the fifth wall section 125 and the first end of the sixth wall section 126 are located on both sides of the third oil inlet 313. The second end of the sixth wall section 126 is connected to the first end of the seventh wall section 127. The second end of the seventh wall section 127 and the first end of the eighth wall section 128 are located on both sides of the fourth oil inlet 314. The second end of the eighth wall section 128 and the first end of the first wall section 121 are located on both sides of the first oil outlet 41.

[0083] Multiple teeth of the first gear 211 are in contact with the first wall section 121, and multiple teeth of the third gear 213 are in contact with the fifth wall section 125.

[0084] During the rotation of the first gear 211, the second wall section 122 contacts one or two teeth of the first gear 211 to ensure the independence of the first oil inlet 311. Specifically, one tooth of the first gear 211 may slide out of the second wall section 122 while the next tooth of the first gear 211 slides into it; or, one tooth of the first gear 211 may be about to slide out of the second wall section 122 while the next tooth of the first gear 211 has already slid into it. The engagement of the third wall section 123 with the second gear 212 is similar, as are the engagements of the fourth wall section 124 with the second gear 212, the sixth wall section 126 with the third gear 213, the seventh wall section 127 with the second gear 212, and the eighth wall section 128 with the second gear 212, and therefore will not be described further. This ensures that the first oil inlet 311 and the second oil inlet 312 are not connected, and also ensures that the third oil inlet 313 and the fourth oil inlet 314 are not connected.

[0085] During the rotation of the second gear 212, the fourth wall section 124 contacts at least one tooth of the second gear 212 to ensure the independence of the second oil outlet 42. During the rotation of the second gear 212, the eighth wall section 128 contacts at least one tooth of the second gear 212 to ensure the independence of the first oil outlet 41.

[0086] The first wall segment 121, the second wall segment 122, the third wall segment 123, the fourth wall segment 124, the fifth wall segment 125, the sixth wall segment 126, the seventh wall segment 127, and the eighth wall segment 128 are all arc-shaped. The central axis of the first wall segment 121 and the central axis of the second wall segment 122 coincide with the central axis of the first gear 211. The central axes of the third wall segment 123, the fourth wall segment 124, the seventh wall segment 127, and the eighth wall segment 128 coincide with the central axis of the second gear 212. The central axes of the fifth wall segment 125 and the sixth wall segment 126 coincide with the central axis of the third gear 213.

[0087] The second wall segment 122 and the third wall segment 123 are arranged at an angle, and the sixth wall segment 126 and the seventh wall segment 127 are arranged at an angle.

[0088] The first gear 211 rotates clockwise, the second gear 212 rotates counterclockwise, and the third gear 213 rotates clockwise.

[0089] Example 3

[0090] This embodiment provides an engine that includes the oil pump described in Embodiment 1 or Embodiment 2. Optionally, the engine is a diesel engine, and the oil pump is a diesel engine oil pump.

[0091] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0092] In the oil pump provided by the present invention, the oil pump includes a housing 10 and a plurality of gears 20 disposed in the housing 10. The plurality of gears 20 in the housing 10 are arranged sequentially and meshed in a preset direction, that is, any two adjacent gears 20 in the housing 10 mesh with each other, and the rotation directions of the two adjacent meshing gears 20 are opposite.

[0093] The plurality of gears 20 within the housing 10 include gear units, each gear unit comprising two adjacent gears 20.

[0094] One gear unit corresponds to one oil port group. The oil port group includes two oil inlets 30 and one oil outlet 40. In one oil port group, the two oil inlets 30 are located on the first or second side of the housing 10, and the oil outlet 40 is located on the second or first side of the housing 10, that is, the two oil inlets 30 are located on the same side of the housing 10, and the oil outlet 40 is located on the other side of the housing 10.

[0095] The two oil inlets 30 of the oil inlet assembly are respectively configured in a one-to-one correspondence with the two gears 20 of the corresponding gear unit, so that the rotation of each gear 20 of the gear unit causes the corresponding oil inlet 30 of the corresponding oil inlet assembly to draw oil into the housing 10, and the oil enters the oil pump chamber. The oil outlet 40 of the oil inlet assembly is located between the two gears 20 of the corresponding gear unit. As the gears 20 rotate, the oil in the oil pump chamber is transported to the oil outlet 40 of the oil inlet assembly, and then discharged through the oil outlet 40.

[0096] The teeth of each gear 20 contact the inner wall of the housing 10 so that the two oil inlets 30 of the oil inlet assembly are not connected and thus do not affect each other.

[0097] In the oil pump of this application, each oil inlet 30 is independent. Even if one oil inlet 30 is higher than its corresponding oil level and sucks in air, it will not affect the other oil inlets 30, and the other oil inlets 30 can still suck in oil normally.

[0098] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0099] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0100] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An oil pump characterized by comprising: The oil pump comprises a shell (10) and a plurality of gears (20) arranged in the shell (10), the plurality of gears (20) are arranged in sequence along a preset direction and are engaged; the plurality of gears (20) comprise a gear unit, the gear unit comprises two adjacent gears (20); The shell (10) has a first side and a second side arranged oppositely, and the distribution directions of the first side and the second side of the shell (10) are perpendicular to the preset direction; One gear unit corresponds to one oil port group, the oil port group comprises two oil inlets (30) and one oil outlet (40), the two oil inlets (30) of the oil port group are located on the first side or the second side of the shell (10), and the oil outlet (40) of the oil port group is located on the second side or the first side of the shell (10); the two oil inlets (30) of the oil port group are arranged one by one with the two gears (20) of the corresponding gear unit, so that the corresponding oil inlet (30) of the corresponding oil port group is sucked into the shell (10) under the rotation of each gear (20) of the gear unit; the oil outlet (40) of the oil port group is arranged between the two gears (20) of the corresponding gear unit; The teeth of each gear (20) are in contact with the inner wall of the shell (10), so that the two oil inlets (30) of the oil port group are not communicated.

2. The oil pump according to claim 1, characterized by The gear unit is one, and the oil pump comprises two gears (20).

3. The oil pump of claim 1, wherein The gear unit is a plurality of; any three adjacent gears in the plurality of gears (20) are a first gear (211), a second gear (212) and a third gear (213), the first gear (211) and the second gear (212) form a gear unit, and the second gear (212) and the third gear (213) form a gear unit; The oil port group is a plurality of, and any two adjacent oil port groups are a first oil port group and a second oil port group; the two oil inlets (30) of the first oil port group are located on the first side of the shell (10), and the oil outlet (40) of the first oil port group is located on the second side of the shell (10); the two oil inlets (30) of the second oil port group are located on the second side of the shell (10), and the oil outlet (40) of the second oil port group is located on the first side of the shell (10).

4. The oil pump according to any one of claims 1 to 3, characterized by The inner wall of the shell (10) comprises a first inner wall segment (101) located on both sides of each oil inlet (30); during the rotation of each gear (20), the first inner wall segment (101) on each side of each oil inlet (30) of the oil port group is in contact with one or two teeth of the corresponding gear (20) of the corresponding gear unit.

5. The oil pump of claim 4, wherein The first inner wall segment (101) is arc-shaped, and the center axis of the first inner wall segment (101) on each side of each oil inlet (30) of the oil port group coincides with the center axis of the corresponding gear (20) of the corresponding gear unit.

6. The oil pump according to any one of claims 1 to 3, characterized by The inner wall of the shell (10) comprises second inner wall segments (102) on both sides of the oil outlet (40), and the two second inner wall segments (102) on both sides of the oil outlet (40) of the oil passage group are respectively arranged in one-to-one correspondence with the two gears (20) of the corresponding gear unit; during the rotation of each gear (20), the second inner wall segment (102) on each side of the oil outlet (40) of the oil passage group is in contact with at least one tooth of the corresponding gear (20) of the corresponding gear unit.

7. The oil pump of claim 6, wherein The second inner wall segment (102) is arc-shaped, and the center axis of the second inner wall segment (102) on both sides of the oil outlet (40) of the oil passage group coincides with the center axis of the two gears (20) of the corresponding gear unit in one-to-one correspondence.

8. The oil pump of claim 1, wherein A connecting pipe (33) is connected at the oil inlet (30).

9. The oil pump of claim 8, wherein The connecting pipe (33) comprises a main pipe segment (331) and a flared segment (332), the first end of the main pipe segment (331) is connected and communicated with the oil inlet (30), the first end of the flared segment (332) is connected and communicated with the second end of the main pipe segment (331), and the second end of the flared segment (332) is used for oil absorption; from the first end to the second end of the flared segment (332), the cross section of the lumen of the flared segment (332) gradually increases.

10. An engine characterized by, The machine oil pump comprises the machine oil pump according to any one of claims 1 to 9.

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