CN113756906A

CN113756906A - Oil pump of internal combustion engine

Info

Publication number: CN113756906A
Application number: CN202110946732.XA
Authority: CN
Inventors: 付俊杰; 潘瑞瑞
Original assignee: Individual
Current assignee: Beinei Tianjin Technology Co ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2021-12-07
Anticipated expiration: 2041-08-18
Also published as: CN113756906B

Abstract

The invention discloses an oil pump of an internal combustion engine, which comprises an end cover, and a pump body, a sealing plate and a driving gear which are connected to the end part of the end cover, wherein a driving shaft is installed on the inner wall of the pump body, the driving gear is fixedly installed on the outer wall of the driving shaft, a driven gear is meshed with the outer wall of the driving gear, a driven shaft is installed on the inner wall of the driven gear, a groove is formed in the inner wall of the end cover, the sealing plate is installed on the inner wall of the groove, the end cover comprises a cover body, limiting round tables are symmetrically connected to the inner wall of the cover body, connecting columns are fixedly installed at one ends, far away from the cover body, of the two limiting round tables, and the connecting columns are uniformly distributed on the limiting round tables. According to the invention, the cover body is connected with the driving gear through the limiting beads and the connecting column, so that a gap and end face leakage between the gear and the end cover or the sealing plate are prevented, the rotation stability of the driving gear is improved, the service life is prolonged, and the driving gear is prevented from being worn due to too close arrangement between the driving gear and the end cover.

Description

Oil pump of internal combustion engine

Technical Field

The invention relates to the technical field of oil delivery pumps, in particular to an oil pump of an internal combustion engine.

Background

The oil pump is used for forcibly pressing and conveying the oil to the moving surfaces of various parts of the engine after the oil is increased to a certain pressure. The oil pump can be divided into two types of gear type and rotor type. The gear-type oil pump is divided into an internal gear-type oil pump and an external gear-type oil pump, and the latter is generally called a gear-type oil pump. And a part for increasing the pressure of the oil and ensuring a certain amount of oil to forcibly supply the oil to each friction surface. Gear and rotor oil pumps are widely used in internal combustion engines. The gear type oil pump has the advantages of simple structure, convenient processing, reliable work, long service life and high oil pressure of the pump, and is widely applied.

The invention relates to an external gear pump in the field of fluid conveying devices, which comprises a pump shell, wherein a pair of externally meshed gears are arranged in the pump shell, an oil inlet is formed in one side of the pump shell, an oil outlet is formed in the other side of the pump shell, two end covers are arranged on the pump shell and matched with the end faces of the gears, and when the external gear pump works, oil in an oil trapping area can be guided into the upper side and the lower side of the oil inlet by an external oil pipe to balance the pressure from the oil outlet so as to protect a bearing and a bearing seat; the invention solves the problems of oil trapping and eccentric wear of the bearing of the gear pump at the same time, so that the gear pump has long service life and low working noise.

In the process of realizing the invention, as the pump body and the end cover are in direct contact with each other and are in hard seal, the end cover and the gear are directly pressed by end faces, parts are abraded after long-time running, so that an end face gap is formed between the gear and the end cover, and a gap is generated between the sealing plate and the gear, so that the end face leakage is easily caused when the pump works, the pressure of pump oil is reduced, and the amount of pump oil is reduced; and lubricating grease between the gear and the end cover is gradually lost and diluted, so that the abrasion of parts such as the gear, the shaft and the like is further accelerated.

For this reason, an engine oil pump is proposed to solve the above-described problems.

Disclosure of Invention

The invention aims to provide an oil pump of an internal combustion engine, which can be used for conveying lubricating oil to a driving gear through a limiting bead arranged inside an annular groove and an oil guide chute so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides an internal-combustion engine oil pump, includes the end cover and connects the pump body, closing plate and the driving gear at its tip, the driving shaft is installed to the inner wall of the pump body, the outer wall fixed mounting of driving shaft has the driving gear, the outer wall meshing of driving gear has driven gear, the driven shaft is installed to driven gear's inner wall, the inner wall of end cover is seted up flutedly, the closing plate is installed to the inner wall of recess, the end cover includes the lid, the inner wall symmetric connection of lid has spacing round platform, two the equal fixed mounting of one end of keeping away from the lid of spacing round platform has a spliced pole, and is a plurality of spliced pole evenly distributed is on spacing round platform, and is a plurality of the equal fixedly connected with spacing pearl of one end of spliced pole.

The driving shaft drives the driving gear to rotate, the connecting column fixes the one end of the limiting bead on the limiting round platform, the limiting bead is enabled to move inside the annular groove, the end cover and the driving gear are connected through the limiting bead and the connecting column, the driving gear is prevented from being worn and torn due to too close acceleration between the driving gear and the end cover, the stability of the rotation of the driving gear is improved, the service life is prolonged, the sealing plate is prevented from moving under the driving of the end cover, the end face clearance is generated, the oil pumping amount is reduced, the pressure of engine oil is reduced, and the service performance is improved.

Preferably, the inner wall fixed mounting of spacing round platform has defeated oil pipe, defeated oil pipe sets up and installs sealing washer one and control valve in the outside one end of lid, the one end of sealing washer one and the outer wall fixed connection of lid, control valve fixed mounting is at the outer wall of defeated oil pipe.

Can lubricate spacing pearl through defeated oil pipe to the inside transport lubricating oil of ring channel, alleviate spacing pearl wearing and tearing, the admission of control valve control lubricating oil, the additive lubricating oil of being convenient for seals a pair of defeated oil pipe and lid through the sealing washer, avoids the air admission.

Preferably, the driving gear includes the gear body, the ring channel has been seted up to the outer wall of the gear body, the inner wall of ring channel and the outer wall swing joint of spacing pearl, spacing collar in the one end inner wall fixedly connected with of ring channel, the outer spacing collar of other end inner wall fixedly connected with of ring channel.

Defeated oil pipe carries lubricating oil to the ring channel in, the ring channel can carry lubricating oil to lead in the oil chute, and lubricating oil in the ring channel can lubricate the removal of spacing pearl, alleviates spacing pearl wearing and tearing, improves performance, and interior spacing collar and outer spacing collar are used for fixed spacing pearl, prevent that spacing pearl from taking off from the ring channel, and the ring channel is convenient for lubricating oil and is fully lubricated the contact surface of driving gear and end cover, improves performance.

Preferably, two ends of the annular groove are connected with an oil guide chute in a penetrating manner, and the inner wall of the oil guide chute is fixedly connected with a spoiler.

The ring channel is carried lubricating oil and is led in the oil chute, it plays the effect of direction to lead the flow of oil chute to lubricating oil, avoid lubricating oil to store up in the ring channel, contact surface carries out abundant lubrication between driving gear and the end cover, improve lubricated effect, and when the driving gear rotates, under the effect of centrifugal force, lubricating grease can be followed and is led the outer fringe removal of oil chute to the driving gear, the spoiler can block lubricating grease simultaneously, the spoiler can block lubricating grease, the lubricating oil that prevents the storage of driving shaft department leaves driving gear and driving shaft junction along leading the oil chute by centrifugal force, make lubricating oil lubricate driving gear and driving shaft junction, alleviate driving shaft wearing and tearing, further improve lubricated effect.

Preferably, the sealing plate comprises a plate body and a W-shaped sealing ring, the outer wall of the plate body is fixedly connected with the outer wall of the W-shaped sealing ring, an adjusting groove is formed in the outer wall of the W-shaped sealing ring, one end of the adjusting groove is connected with a connecting inner groove, the inner wall of the adjusting groove is movably connected with a second sealing ring, and one end of the second sealing ring is fixedly provided with an elastic sheet.

The elastic sheet has certain elasticity, and the adjustment tank is in meshing cavity department, because the oil trapping phenomenon makes the machine oil pressure grow of meshing intracavity portion, and high-pressure oil extrusion elastic sheet makes the elastic sheet warp this moment, alleviates W shape sealing washer, driving gear and driven gear pressure that receives, alleviates driving shaft and driven shaft atress, prevents that reactive loss from increasing and fluid from generating heat.

Preferably, the outer wall fixed mounting of flexure strip has the spring coil, the spring coil is kept away from the one end of flexure strip and is connected on the inner wall of connecting the inside groove, the bottom of connecting the inside groove is connected with the oil storage chamber, the plate body is close to the one end in oil storage chamber and is connected with the drainage tube, the outer wall fixed mounting of drainage tube has the oiling valve.

When the oil trapping phenomenon is caused, when a local vacuum is formed inside the meshing cavity, the pressure inside the meshing cavity is smaller than the pressure in the connecting inner groove, the elastic sheet is extruded by the pressure of liquid inside the connecting inner groove, the elastic sheet moves towards the direction of the driving gear, engine oil stored in the oil storage cavity and the connecting inner groove flows out to enter the cavity, the local vacuum is eliminated, the elastic sheet resets under the traction of the spring ring, the gear is prevented from being abraded due to the local vacuum, and the service life is prolonged.

Compared with the prior art, the invention has the beneficial effects that:

1. connect end cover and driving gear through spacing pearl and spliced pole, improve driving gear pivoted stability, increase of service life, when the driving gear is to being close to end cover department removal, spacing pearl passes through ring channel contact extrusion driving gear, prevent to accelerate driving gear wearing and tearing too near between driving gear and the end cover to can prevent that the closing plate from removing under the drive of end cover, the end face clearance appears, lead to the pump oil volume to reduce, make the machine oil pressure decline.

2. Can carry oil storage tank and drainage groove with lubricating oil through the ring channel in, lubricating oil in the ring channel can lubricate the removal of spacing pearl, alleviate spacing pearl wearing and tearing, lubricating oil in the oil storage tank lubricates between driving shaft and the driving gear, when the driving gear rotates, under the effect of centrifugal force, lubricating grease can be followed and led the outer fringe removal of oil chute to the driving gear, the spoiler can block lubricating grease, prevent that lubricating oil from receiving centrifugal force to leave driving gear and driving shaft junction along leading oil chute, alleviate the wearing and tearing during operation, performance is improved.

3. The elastic sheet that removes through the setting can make inside machine oil flow, fills the space, alleviates the local vacuum that the oily phenomenon of trapping formed, improves the stability of using, makes the machine oil pressure grow of meshing intracavity portion when the oily phenomenon of trapping, and the high pressure oil extrusion elastic sheet makes the elastic sheet warp this moment, alleviates W shape sealing washer, driving gear and driven gear pressure that receives, alleviates driving shaft and driven shaft atress, prevents that reactive loss from increasing and fluid from generating heat.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic cross-sectional view taken along the line J-J of FIG. 2 according to the present invention;

FIG. 4 is a schematic perspective view of the end cap of the present invention;

FIG. 5 is a perspective view of the sealing plate of the present invention;

FIG. 6 is a schematic view of the L-L cross-sectional structure of FIG. 3 according to the present invention;

FIG. 7 is an enlarged view of the structure at B of FIG. 6 according to the present invention;

FIG. 8 is an enlarged view of the structure of FIG. 1 at A according to the present invention;

FIG. 9 is a schematic view of the K-K cross-sectional structure of FIG. 2 according to the present invention;

FIG. 10 is a perspective view of a driving gear of the present invention;

FIG. 11 is a partial sectional view of a driving gear of the present invention.

In the figure: 1. an end cap; 101. a cover body; 102. a limiting round table; 103. connecting columns; 104. a limiting bead; 105. an oil delivery pipe; 106. a first sealing ring; 107. a control valve; 2. a sealing plate; 201. a plate body; 202. a W-shaped seal ring; 203. an adjustment groove; 204. an elastic sheet; 205. a second sealing ring; 206. connecting the inner grooves; 207. a spring ring; 208. an oil storage chamber; 209. a drainage tube; 3. a pump body; 4. a drive shaft; 5. a driving gear; 501. a gear body; 502. an annular groove; 503. an oil guiding chute; 504. a spoiler; 505. an inner spacing ring; 506. an outer spacing collar; 6. a driven gear; 7. a driven shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used 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 thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 11, the present invention provides an oil pump of an internal combustion engine, which has the following technical scheme:

the utility model provides an internal-combustion engine oil pump, including end cover 1 and connect the pump body 3 at its tip, closing plate 2 and driving gear 5, driving shaft 4 is installed to the inner wall of the pump body 3, the outer wall fixed mounting of driving shaft 4 has driving gear 5, the outer wall meshing of driving gear 5 has driven gear 6, driven shaft 7 is installed to driven gear 6's inner wall, the inner wall of end cover 1 is seted up flutedly, closing plate 2 is installed to the inner wall of recess, end cover 1 includes lid 101, the inner wall symmetric connection of lid 101 has spacing round platform 102, the equal fixed mounting in one end of keeping away from lid 101 of two spacing round platforms 102 has spliced pole 103, a plurality of spliced poles 103 evenly distributed is on spacing round platform 102, the equal fixedly connected with spacing pearl 104 of one end of a plurality of spliced poles 103.

When the device is operated, the driving shaft 4 drives the driving gear 5 to rotate, the driving gear 5 drives the driven gear 6 to rotate, the internal structures of the driven gear 6 and the driving gear 5 are the same, and the connection mode between the end cover 1 is the same, the connection column 103 fixes one end of the limit bead 104 on the limit round platform 102, so that the limit bead 104 moves in the annular groove 502, when the driving gear 5 moves to a position close to the end cover 1, the limiting bead 104 contacts and extrudes the driving gear 5 through the annular groove 502, so as to prevent the driving gear 5 from being worn too close to the end cover 1 to accelerate the driving gear 5, improve the stability of the driving gear 5 in rotation, prolong the service life, connect end cover 1 and driving gear 5 through spacing pearl 104 and spliced pole 103, prevent that the closing plate 2 from removing under end cover 1's drive, appear the terminal surface clearance, lead to the pump oil volume to reduce, make the decline of machine oil pressure.

Referring to fig. 9, as an embodiment of the present invention, an oil delivery pipe 105 is fixedly mounted on an inner wall of the limiting round table 102, a first seal ring 106 and a control valve 107 are mounted on one end of the oil delivery pipe 105 disposed outside the cover 101, one end of the first seal ring 106 is fixedly connected to an outer wall of the cover 101, and the control valve 107 is fixedly mounted on the outer wall of the oil delivery pipe 105.

The pipeline that defeated oil pipe 105 set up the inside one end of spacing round platform 102 aims at the space department between outer spacing collar 506 and the interior spacing collar 505, can be to the inside transport lubricating oil of ring channel 502 through defeated oil pipe 105, lubricate spacing pearl 104, alleviate spacing pearl 104 wearing and tearing, control valve 107 control lubricating oil gets into, the timely additional lubricating oil of being convenient for, seal up defeated oil pipe 105 and lid 101 through sealing washer 106, avoid the air admission.

Referring to fig. 10, the driving gear 5 includes a gear body 501, an annular groove 502 is formed in an outer wall of the gear body 501, an inner wall of the annular groove 502 is movably connected to an outer wall of the limiting bead 104, an inner limiting ring 505 is fixedly connected to an inner wall of one end of the annular groove 502, and an outer limiting ring 506 is fixedly connected to an inner wall of the other end of the annular groove 502.

The oil delivery pipe 105 delivers lubricating oil to the annular groove 502, the annular groove 502 can deliver the lubricating oil to the oil guide chute 503, the lubricating oil in the annular groove 502 can lubricate the movement of the limiting ball 104, the abrasion of the limiting ball 104 is reduced, the service life is prolonged, the inner limiting ring 505 and the outer limiting ring 506 are used for fixing the limiting ball 104, the limiting ball 104 is prevented from loosening from the annular groove 502, the outer limiting ring 506 and the inner limiting ring 505 can be used as sealing rings, the lubricating oil can be stored in the annular groove 502 and flows into the oil guide chute 503, the contact surface between the driving gear 5 and the end cover 1 is fully lubricated, and the service performance is improved.

Referring to fig. 11, an oil guide chute 503 is penetratingly connected to both ends of an annular groove 502, and a spoiler 504 is fixedly connected to an inner wall of the oil guide chute 503.

The oil guiding chute 503 is provided in plurality and is inclined, the depth of the oil guiding chute 503 near the outer edge of the driving gear 5 is lower than the depth of the oil guiding chute 503 near the center of the driving gear 5, the annular groove 502 feeds the lubricating oil into the oil guiding chute 503, the oil guiding chute 503 plays a role in guiding the flow of the lubricating oil, preventing the lubricating oil from accumulating in the annular groove 502, the contact surface between the driving gear 5 and the end cover 1 cannot be sufficiently lubricated, and when the driving gear 5 rotates, under the action of centrifugal force, the lubricating grease can move to the outer edge of the driving gear 5 along the oil guide chute 503, simultaneously spoiler 504 can block lubricated grease, prevents that the lubricating oil of storage of driving shaft 4 department from receiving centrifugal force effect to leave driving gear 5 and driving shaft 4 junction along leading oily chute 503, makes lubricating oil lubricate driving gear 5 and driving shaft 4 junction, alleviates driving shaft 4 wearing and tearing.

Referring to fig. 5, as an embodiment of the present invention, the sealing plate 2 includes a plate body 201 and a W-shaped sealing ring 202, an outer wall of the plate body 201 is fixedly connected to an outer wall of the W-shaped sealing ring 202, an adjusting groove 203 is formed in the outer wall of the W-shaped sealing ring 202, one end of the adjusting groove 203 is connected to an inner connecting groove 206, a second sealing ring 205 is movably connected to an inner wall of the adjusting groove 203, and one end of the second sealing ring 205 is fixedly mounted with an elastic sheet 204.

The second sealing ring 205 avoids leakage of engine oil in the connecting inner groove 206, the adjusting groove 203 can be arranged at the position of the W-shaped sealing ring 202 corresponding to the gear meshing cavity, or the oil suction cavity formed by the upper half part of the pump body 3 and the driving gear 5, and plays a role of an unloading groove, the size of the adjusting groove 203 is small, so that the oil suction cavity and the oil discharge cavity can be ensured to be disconnected, the elastic sheet 204 has certain elasticity and can be deformed, when the adjusting groove 203 is positioned at the meshing cavity, the pressure of the engine oil in the meshing cavity is increased due to oil trapping, the elastic sheet 204 is extruded by high-pressure oil at the moment, the elastic sheet 204 is deformed, the pressure borne by the W-shaped sealing ring 202, the driving gear 5 and the driven gear 6 is reduced, the stress of the driving shaft 4 and the driven shaft 7 is reduced, and reactive loss increase and oil heating are prevented.

5-6, a spring ring 207 is fixedly installed on the outer wall of the elastic sheet 204, one end of the spring ring 207, which is far away from the elastic sheet 204, is connected to the inner wall of the inner connecting groove 206, the bottom of the inner connecting groove 206 is connected to an oil storage cavity 208, one end of the plate body 201, which is close to the oil storage cavity 208, is connected to a drainage tube 209, and an oil filling valve is fixedly installed on the outer wall of the drainage tube 209.

The oil storage cavity 208 stores oil, the oil can be injected into the oil storage cavity 208 through the oil injection valve control drainage pipe 209, the oil storage cavity 208 is communicated with the inner connecting groove 206, when a local vacuum is formed inside the meshing cavity due to oil trapping, the pressure inside the meshing cavity is smaller than the pressure inside the inner connecting groove 206, the elastic sheet 204 is extruded by the pressure of the liquid inside the inner connecting groove 206, the elastic sheet 204 moves towards the driving gear 5, the oil stored in the oil storage cavity 208 and the inner connecting groove 206 flows out to enter the cavity to eliminate the local vacuum, the elastic sheet 204 is reset under the traction of the spring ring 207 to prevent the gear from being worn by the local vacuum, the service life is prolonged, the adjusting groove 203, the oil storage cavity 208, the inner connecting groove 206 and the internal devices can be arranged at an oil suction cavity formed at the upper half part of the pump body 3 and the driving gear 5, when the oil in the oil suction cavity is less, and the liquid level is lower than the adjusting groove 203, the oil storage cavity 208 and the liquid in the inner connecting groove 206 squeeze the elastic sheet 204, and the elastic sheet 204 moves towards the driving gear 5 to supplement oil, so that the oil in the oil suction cavity is prevented from being insufficient, air enters the meshing part of the gear, and the gear is abraded.

The working principle is as follows: the driving shaft 4 can drive the driving gear 5 to rotate, the driving gear 5 drives the driven gear 6 to rotate, the driving shaft 4 drives the driving gear 5 to rotate, the connecting column 103 fixes one end of the limiting bead 104 on the limiting circular truncated cone 102, the limiting bead 104 moves in the annular groove 502, when the driving gear 5 moves close to the end cover 1, the limiting bead 104 contacts and extrudes the driving gear 5 through the annular groove 502, the driving gear 5 and the end cover 1 are prevented from being too close to accelerate the abrasion of the driving gear 5, the end cover 1 and the driving gear 5 are connected through the limiting bead 104 and the connecting column 103, the sealing plate 2 is prevented from moving under the drive of the end cover 1, lubricating oil can be conveyed to the inside of the annular groove 502 through the oil conveying pipe 105, the limiting bead 104 is lubricated, the abrasion of the limiting bead 104 is reduced, the control valve 107 controls the lubricating oil to enter, and the lubricating oil conveying pipe 105 conveys the lubricating oil into the annular groove 502, the annular groove 502 can convey lubricating oil into the oil guide chute 503, the oil guide chute 503 plays a role in guiding the flow of the lubricating oil, the lubricating oil is prevented from being accumulated in the annular groove 502 and cannot sufficiently lubricate a contact surface between the driving gear 5 and the end cover 1, when the driving gear 5 rotates, lubricating grease can move to the outer edge of the driving gear 5 along the oil guide chute 503 under the action of centrifugal force, the lubricating oil at the driving shaft 4 is prevented from leaving the joint of the driving gear 5 and the driving shaft 4 along the oil guide chute 503 under the action of centrifugal force, when the adjusting groove 203 is positioned at the meshing cavity, the engine oil presses the elastic sheet 204 to deform the elastic sheet 204, when the meshing cavity forms a local vacuum due to the oil trapping phenomenon, the pressure inside the meshing cavity is smaller than the pressure in the inner groove 206 in the inner groove, the elastic sheet 204 is pressed by the liquid pressure inside the connecting groove 206, and the elastic sheet 204 moves towards the driving gear 5, the oil stored in the oil storage chamber 208 and the connecting inner groove 206 flows out to enter the cavity, the partial vacuum is eliminated, and the elastic sheet 204 is reset under the traction of the spring ring 207.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an internal-combustion engine oil pump, includes end cover (1) and connects pump body (3), closing plate (2) and driving gear (5) at its tip, its characterized in that: driving shaft (4) are installed to the inner wall of the pump body (3), the outer wall fixed mounting of driving shaft (4) has driving gear (5), the outer wall meshing of driving gear (5) has driven gear (6), driven shaft (7) are installed to the inner wall of driven gear (6), the inner wall of end cover (1) is seted up flutedly, closing plate (2) are installed to the inner wall of recess, end cover (1) is including lid (101), the inner wall symmetric connection of lid (101) has spacing round platform (102), two the equal fixed mounting in one end of keeping away from lid (101) of spacing round platform (102) has spliced pole (103), and is a plurality of spliced pole (103) evenly distributed is on spacing round platform (102), and is a plurality of the equal fixedly connected with spacing pearl (104) of one end of spliced pole (103).

2. An internal combustion engine oil pump according to claim 1, characterized in that: the inner wall fixed mounting of spacing round platform (102) has defeated oil pipe (105), defeated oil pipe (105) set up and install sealing washer (106) and control valve (107) in lid (101) outside one end, the one end of sealing washer (106) and the outer wall fixed connection of lid (101), control valve (107) fixed mounting is at the outer wall of defeated oil pipe (105).

3. An internal combustion engine oil pump according to claim 1, characterized in that: the driving gear (5) comprises a gear body (501), an annular groove (502) is formed in the outer wall of the gear body (501), the inner wall of the annular groove (502) is movably connected with the outer wall of the limiting bead (104), an inner limiting ring (505) is fixedly connected with the inner wall of one end of the annular groove (502), and an outer limiting ring (506) is fixedly connected with the inner wall of the other end of the annular groove (502).

4. An internal combustion engine oil pump according to claim 3, characterized in that: two ends of the annular groove (502) are connected with an oil guide chute (503) in a penetrating mode, and a spoiler (504) is fixedly connected to the inner wall of the oil guide chute (503).

5. An internal combustion engine oil pump according to claim 1, characterized in that: the sealing plate (2) comprises a plate body (201) and a W-shaped sealing ring (202), the outer wall of the plate body (201) is fixedly connected with the outer wall of the W-shaped sealing ring (202), an adjusting groove (203) is formed in the outer wall of the W-shaped sealing ring (202), one end of the adjusting groove (203) is connected with an inner connecting groove (206), the inner wall of the adjusting groove (203) is movably connected with a second sealing ring (205), and an elastic sheet (204) is fixedly mounted at one end of the second sealing ring (205).

6. An internal combustion engine oil pump according to claim 5, characterized in that: the outer wall fixed mounting of flexure strip (204) has spring coil (207), the one end that flexure strip (204) were kept away from in spring coil (207) is connected on the inner wall of connecting inside groove (206), the bottom of connecting inside groove (206) is connected with oil storage chamber (208), the one end that plate body (201) are close to oil storage chamber (208) is connected with drainage tube (209), the outer wall fixed mounting of drainage tube (209) has the oiling valve.