CN111173737A

CN111173737A - Integrated oil pumping device

Info

Publication number: CN111173737A
Application number: CN201910818435.XA
Authority: CN
Inventors: 杨昌林; 张德键; 申小刚
Original assignee: Chongqing Hongyu Precision Industrial Co ltd
Current assignee: Chongqing Hongyu Precision Industrial Co ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-05-19

Abstract

The invention discloses an integrated oil pumping device, which comprises a pump cover assembly, a driving assembly, a driven assembly and a pump body assembly, wherein the pump cover assembly is connected with the driving assembly; the main component of the pump body component is a pump body; the middle part of the pump body is provided with a pair of gear cavities; an oil inlet groove I and an oil outlet groove I are respectively formed in the upper end and the lower end of the gear cavity; the drive assembly comprises a drive gear and a drive shaft; the driven assembly comprises a driven gear and a driven shaft; the driving gear and the driven gear are positioned in the gear cavity and are meshed with each other; the main component of the pump cover assembly is a pump cover; the pump cover is arranged on the pump body; the oil pumping device has the advantages of short oil circuit, small leakage, low energy consumption, small pressure pulsation and compact structure, greatly reduces the assembly space and has prospective technical effects.

Description

Integrated oil pumping device

Technical Field

The invention belongs to the technical field of automobile automatic transmissions, and particularly relates to an integrated oil pumping device.

Background

The traditional automatic transmission of the automobile adopts an independent oil pumping device to provide a power source for a hydraulic transmission system, and the automatic transmission adopting a cycloid rotor pump or a gear pump controls each gear shifting mechanism and an actuating element by distributing oil through a valve plate.

The oil pumping device has the advantages of single structure, long oil path, large flow leakage, fast kinetic energy reduction and high energy consumption, and is easy to cause pressure pulsation of a transmission system to influence the performance of the transmission; moreover, the oil pumping device, the gear shifting mechanism and other executing elements in the traditional hydraulic system are all configured independently, so that a large amount of space of the transmission is occupied, and the development trend of compactness, miniaturization, intelligence and light weight of the transmission is not facilitated.

The oil pumping device of the conventional automatic transmission has a limitation in applications in which efficiency and intelligentization of component integration are increasingly emphasized due to the above-mentioned disadvantages.

Therefore, there is a need in the art for an oil pumping device that overcomes the above-mentioned problems.

Disclosure of Invention

The technical scheme adopted for achieving the aim of the invention is that the integrated oil pumping device comprises a pump cover assembly, a driving assembly, a driven assembly and a pump body assembly.

The main component of the pump body component is a pump body.

The middle part of the pump body is provided with a pair of gear cavities, and the gear cavities are respectively provided with a driving shaft hole I and a driven shaft hole I. And an oil inlet groove I and an oil outlet groove I are respectively formed at the upper end and the lower end of the gear cavity.

An oil inlet and an oil return opening communicated with the oil inlet groove I are formed in the side wall of the pump body. An oil outlet communicated with the oil outlet groove I is formed in the side wall of the pump body.

And the side wall of the pump body is provided with a piston control oil duct I, a piston control oil duct II, a piston control oil duct III, a piston cylinder hole I and a piston cylinder hole II. And the piston cylinder hole II is respectively communicated with the piston control oil duct I and the piston control oil duct II, and the piston control oil duct II is connected with the oil outlet through an external control oil way and supplies oil to the piston cylinder hole II. And the piston cylinder hole I is communicated with a piston control oil passage III, and the piston control oil passage III is connected with the oil outlet through an external control oil passage and supplies oil to the piston cylinder hole I. And gear shifting cylinder sleeves are arranged in the piston cylinder hole II and the piston cylinder hole I. And a gear shifting piston connected with a gear shifting mechanism is arranged in the gear shifting cylinder sleeve.

And an oil inlet and an oil outlet of the oil injection control pipeline which are communicated with each other are formed in the side wall of the pump body. The oil inlet of the oil injection control pipeline is connected with the oil outlet through an external control oil way, and the oil outlet of the oil injection control pipeline is connected with an external oil injection control element.

And an electronic pump valve interface and an electronic pump valve oil inlet which are communicated with each other are formed in the side wall of the pump body. The electronic pump valve interface is connected with an external electronic pump valve, and an oil inlet of the electronic pump valve is connected with the oil return port through an external control oil way.

The drive assembly includes a drive gear and a drive shaft. The driving shaft penetrates into the driving gear and is fixed.

The driven assembly includes a driven gear and a driven shaft. The driven shaft penetrates into the driven gear. The driving gear and the driven gear are positioned in the gear cavity and are meshed with each other.

The main component of the pump cover assembly is a pump cover.

And the pump cover is provided with a driving shaft hole II and a driven shaft hole II which are respectively matched with the driving shaft hole I and the driven shaft hole I of the pump body. And the pump cover is also provided with an oil inlet groove II and an oil outlet groove II which are respectively matched with the oil inlet groove I and the oil outlet groove I of the pump body.

The pump cover is installed on the pump body. One end of the driving shaft is installed in a driving shaft hole I of the pump body, and the other end of the driving shaft penetrates out of a driving shaft hole II of the pump cover. One end of the driven shaft is installed in a driven shaft hole I of the pump body, and the other end of the driven shaft is installed in a driven shaft hole II of the pump body.

Furthermore, go out oil groove II and extend on being close to drive shaft hole II's the lateral wall and have dashpot I. Go out oil groove II and extend on being close to driven shaft hole II's the lateral wall and have buffer slot II.

Further, buffer slot I and buffer slot II are the rectangular channel, and the rectangular channel groove width is 2 ~ 4mm, and the groove depth is 1 ~ 2 mm.

Furthermore, the extending tail ends of the buffer groove I and the buffer groove II are both circular arcs. The included angle between the arc center line of the extending tail end of the buffer groove I and the connecting line of the center of the driving shaft hole II and the center of the driven shaft hole II is recorded as psi, and the psi range is 85-95 degrees. And recording the included angle between the arc central line of the extending tail end of the buffer groove II and the connecting line of the center of the driving shaft hole II and the center of the driven shaft hole II as sigma, wherein the range of the sigma is 85-95 degrees.

Furthermore, the oil outlet groove I is communicated with the driven shaft hole I through a lubricating oil groove I, and the oil outlet groove I is communicated with the driving shaft hole I through a lubricating oil groove II.

The oil outlet groove II is communicated with the driven shaft hole II through a lubricating oil groove III, and the oil outlet groove II is communicated with the driving shaft hole II through a lubricating oil groove IV. The lubricating oil groove III is matched with the lubricating oil groove I, and the lubricating oil groove IV is matched with the lubricating oil groove II.

Further, a pump body bushing is press-fitted in the driving shaft hole I in an interference fit manner, and the pump body bushing is a bimetal rolling bushing.

And a pump cover bushing is press-fitted in the driving shaft hole II through interference fit, and the pump cover bushing is a bimetal rolling bushing.

And a gear bushing is press-mounted in the driven gear through interference fit. The gear bushing is a bimetal rolled bushing.

Further, an oil drainage groove is formed in the bottom of the hole I of the driving shaft hole. And an oil drainage port communicated with the oil drainage groove is formed in the side wall of the pump body.

Further, lubricating-oil groove I, lubricating-oil groove II, lubricating-oil groove III and lubricating-oil groove IV are V type groove, and V type groove contained angle is 60, and the groove depth is 0.5 ~ 0.8 mm.

Further, the end part of the driving shaft penetrating through the driving shaft hole II is provided with an external spline.

further, the driving gear and the driven gear are both provided with a tooth form angle α of 25 degrees and a tooth height coefficient

The long tooth profile involute gear of (1). The number of teeth of the driving gear and the driven gear is 10.

The technical effect of the invention is undoubted, and the invention has the following advantages:

1) the oil pumping device has the advantages of short oil circuit, small leakage, low energy consumption and small pressure pulsation;

2) the oil pumping device disclosed by the invention has the advantages that the piston control oil duct is arranged to effectively integrate the gear shifting mechanism, the electronic pump valve oil inlet and outlet integrated electronic pump valve interface is arranged, and the oil inlet and outlet integrated oil injection control executive component interface of the oil injection control pipeline is arranged, so that the structure is compact, the assembly space is greatly reduced, and the prospective technical effect is achieved.

Drawings

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

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

FIG. 3 is a schematic view of the pump body assembly of the present invention;

FIG. 4 is a schematic view of the pump body of the present invention, FIG. 1;

FIG. 5 is a schematic view of the pump body of the present invention, shown in FIG. 2;

FIG. 6 is a schematic view of the driving assembly of the present invention;

FIG. 7 is a schematic view of an assembly structure of the driven gear and the gear bushing according to the present invention;

FIG. 8 is a schematic view of the pump cap assembly of the present invention;

FIG. 9 is a schematic view of a pump cover according to the present invention 1;

fig. 10 is a schematic structural diagram 2 of the pump cover of the present invention.

In the figure: the pump cover assembly 1, the pump cover 11, the driving shaft hole II1101, the driven shaft hole II1102, the oil inlet groove II1103, the oil outlet groove II1104, the lubricating oil groove III1105, the lubricating oil groove IV1106, the buffer groove I1107, the buffer groove II1108, the pump cover bush 12, the driving assembly 2, the driving gear 21, the driving shaft 22, the driven assembly 3, the driven gear 31, the driven shaft 32, the gear bush 33, the pump body assembly 4, the pump body 41, the driving shaft hole I4101, the oil drain groove 41011, the driven shaft hole I4102, the oil inlet groove I4103, the oil outlet groove I4104, the lubricating oil groove I4105, the lubricating oil groove II4106, the oil inlet 4107, the oil outlet 4108, the oil return port 4109, the oil drain port 4110, the piston control oil passage I4111, the piston control oil passage II4112, the piston control oil passage III4113, the piston cylinder hole I4114, the piston cylinder hole II4115, the oil inlet 4116 of the oil outlet control pipeline 4117, the oil outlet 4117 of the oil, A hollow pin 44 and a pump block bushing 45.

Detailed Description

The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.

Example 1:

the embodiment discloses an integrated oil pumping device, which is shown in fig. 1 and comprises a pump cover assembly 1, a driving assembly 2, a driven assembly 3 and a pump body assembly 4.

Referring to fig. 2 to 5, the main component of the pump body assembly 4 is a pump body 41.

A pair of gear cavities is formed in the middle of the pump body 41, and a driving shaft hole I4101 and a driven shaft hole I4102 are formed in the gear cavities respectively. An oil drainage groove 41011 is arranged at the hole bottom of the driving shaft hole I4101. The pump body bush 45 is press-mounted in the driving shaft hole I411 in an interference fit mode, and the pump body bush 45 is a bimetal rolling bush.

An oil inlet groove I4103 and an oil outlet groove I4104 are respectively formed in the upper end and the lower end of the gear cavity. The oil outlet groove I4104 is communicated with the driven shaft hole I4102 through an opening lubricating oil groove I4105, and the oil outlet groove I4104 is communicated with the driving shaft hole I4101 through an opening lubricating oil groove II 4106.

An oil inlet 4107 and an oil return port 4109 communicated with the oil inlet groove I4103 are formed in the side wall of the pump body 41, the oil return port 4109 is used for collecting return oil of a transmission hydraulic system, the return oil has certain pressure and is communicated with the oil inlet 4107, and the self-priming capacity of the oil pump is enhanced. An oil outlet 4108 communicated with the oil outlet groove I4104 is formed in the side wall of the pump body 41. An oil drainage port 4110 communicated with the oil drainage groove 41011 is formed in the side wall of the pump body 41.

A piston control oil passage I4111, a piston control oil passage II4112, a piston control oil passage III4113, a piston cylinder hole I4114 and a piston cylinder hole II4115 are formed in the side wall of the pump body 41. And the piston cylinder hole II4115 is respectively communicated with a piston control oil passage I4111 and a piston control oil passage II4112, and the piston control oil passage II4112 is connected with an oil outlet 4108 through an external control oil way and supplies oil to the piston cylinder hole II 4115. The piston cylinder hole I4114 is communicated with a piston control oil passage III4113, and the piston control oil passage III4113 is connected with an oil outlet 4108 through an external control oil passage and supplies oil to the piston cylinder hole I4114. All install the cylinder liner 42 of shifting in piston cylinder hole II4115 and piston cylinder hole I4114, install the piston of shifting that is connected with gearshift in the cylinder liner 42 of shifting, promote the gearshift through the piston of shifting and shift gears.

An oil injection control pipeline oil inlet 4116 and an oil injection control pipeline oil outlet 4117 which are mutually communicated are formed in the side wall of the pump body 41, the oil injection control pipeline oil inlet 4116 is connected with an oil outlet 4108 through an external control oil way, and the oil injection control pipeline oil outlet 4117 is connected with an external oil injection control element.

An electronic pump valve interface 4118 and an electronic pump valve oil inlet 4119 which are mutually communicated are arranged on the side wall of the pump body 41, the electronic pump valve interface 4118 is connected with an external electronic pump valve, and the electronic pump valve oil inlet 4119 is connected with an oil return port 4109 through an external control oil path; the electronic pump valve can not only provide lubricating oil for the transmission, but also provide oil pressure of an engine starting and stopping device, and is determined by the structure of the transmission.

Referring to fig. 6, the driving assembly 2 includes a driving gear 21 and a driving shaft 22. The driving shaft 22 is inserted into the driving gear 21 and fixed, and is press-fitted into a whole by interference fit.

referring to fig. 7, the driven assembly 3 comprises a driven gear 31 and a driven shaft 32, a gear bush 33 is pressed in the driven gear 31 through interference fit, the gear bush 33 is made of a bimetal rolling bush, the driven shaft 32 penetrates into the gear bush 33 of the driven gear 31, the driving gear 21 and the driven gear 31 are positioned in a gear cavity and are meshed with each other, in the embodiment, the tooth form angle α is 25 degrees, and the tooth height coefficient is 25 degrees

The long tooth profile involute gear can reduce the transmission noise of the gear and improve the wear resistance of the gear while increasing the volume and reducing the space of the device. The number of teeth of the driving gear 21 and the driven gear 31 is 10, and the modulus and the thickness of the driving gear 21 are selected according to the displacement of the oil pumping device.

Referring to fig. 8 to 10, the main component of the pump cap assembly 1 is a pump cap 11.

The pump cover 11 is provided with a driving shaft hole II1101 and a driven shaft hole II1102 respectively corresponding to the driving shaft hole I4101 and the driven shaft hole I4102 of the pump body 41. And a pump cover bush 12 is press-fitted in the driving shaft hole II1101 through interference fit, and the pump cover bush 12 is a bimetal rolled bush.

The pump cover 11 is further provided with an oil inlet groove II1103 and an oil outlet groove II1104 which are respectively matched with the oil inlet groove I4103 and the oil outlet groove I4104 of the pump body 41. The oil outlet groove II1104 is communicated with the driven shaft hole II1102 through a lubricating oil groove III1105, and the oil outlet groove II1104 is communicated with the driving shaft hole II1101 through a lubricating oil groove IV 1106. The lubricating oil groove III1105 is matched with the lubricating oil groove I4105, and the lubricating oil groove IV1106 is matched with the lubricating oil groove II 4106.

A buffer groove I1107 extends from the side wall of the oil outlet groove II1104 close to the driving shaft hole II 1101. And a buffer groove II1108 extends on the side wall of the oil outlet groove II1104 close to the driven shaft hole II 1102. Buffer slot I1107 and buffer slot II1108 are the rectangular channel, and the rectangular channel groove width is 2mm, and the groove depth is 1 mm. The extending ends of the buffer groove I1107 and the buffer groove II1108 are both circular arcs. The included angle between the arc center line of the extending end of the buffer groove I1107 and the connecting line of the center of the driving shaft hole II1101 and the center of the driven shaft hole II1102 is written as psi, and the range of psi is 85 degrees. The included angle between the arc center line of the extending tail end of the buffer groove II1108 and the connecting line of the center of the driving shaft hole II1101 and the center of the driven shaft hole II1102 is recorded as sigma, and the range of the sigma is 85 degrees.

The pump cover 11 is fixed on the pump body 41 through screw connection, and for convenience of installation, a positioning pin 43 and a hollow pin 44 are installed on the pump body 41, a positioning hole is formed in the corresponding position of the pump cover 11, and the pump body 41 and the pump cover 11 are connected through screws after being positioned through the positioning pin 43 and the hollow pin 44. One end of the drive shaft 22 is mounted in the drive shaft hole I411 of the pump body 41, and the other end of the drive shaft 22 passes through the drive shaft hole II1101 of the pump cover 11. The end of the drive shaft 22 that passes through the drive shaft hole II1101 has external splines. The drive shaft 22 is connected to external power by external splines. One end of the driven shaft 32 is press-fitted in the driven shaft hole I412 of the pump body 41 by interference fit, and the other end of the driven shaft 32 is press-fitted in the driven shaft hole II1102 of the pump body 41 by interference fit.

Further, in this embodiment, the lubricating oil groove I4105, the lubricating oil groove II4106, the lubricating oil groove III1105 and the lubricating oil groove IV1106 are all V-shaped grooves, an included angle of the V-shaped groove is 60 °, and a groove depth is 0.5 mm.

When the oil pump works, the external power drives the driving shaft 22 to rotate, the driving shaft 22 drives the driving gear 21 and the driven gear 31 to rotate, oil flows into the oil inlet groove I4103 and the oil inlet groove II1103 from the oil inlet 4107, the driving gear 21 and the driven gear 31 rotate to bring the oil in the oil inlet groove I4103 and the oil inlet groove II1103 into the oil outlet groove I4104 and the oil outlet groove II1104, and finally the oil flows out through the oil outlet 4108; in the process, the buffer tank I1107 and the buffer tank II1108 are communicated with the gear cavity and the oil outlet tank I4104 and the oil outlet tank II1104, so that pressure balance is ensured, the oil trapping phenomenon is eliminated, and the normal operation of the oil pump is ensured.

During the operation of the oil pump, oil flows into the driven shaft hole I4102 through the lubricating oil groove I4105, flows into the driven shaft hole II1102 through the lubricating oil groove III1105, and lubricates the driven shaft 32 and the gear bush 33. Meanwhile, oil flows into the drive shaft hole II1101 through the lubricating oil groove IV1106, lubricates the drive shaft 22 and the pump cover bush 12, flows into the drive shaft hole I4101 through the lubricating oil groove II4106, lubricates the drive shaft 22 and the pump body bush 45, and then flows out through the oil drainage groove 41011 at the hole bottom of the drive shaft hole I4101.

The oil pumping device disclosed by the implementation has the advantages of short oil circuit, small leakage, low energy consumption and small pressure pulsation. The oil pumping device is compact in structure, assembly space is greatly reduced, and the oil pumping device has the technical effect of foresight.

Example 2:

the embodiment discloses a basic implementation manner, and an integrated oil pumping device, which is shown in fig. 1, includes a pump cover assembly 1, a driving assembly 2, a driven assembly 3, and a pump body assembly 4.

A pair of gear cavities is formed in the middle of the pump body 41, and a driving shaft hole I4101 and a driven shaft hole I4102 are formed in the gear cavities respectively.

An oil inlet groove I4103 and an oil outlet groove I4104 are respectively formed in the upper end and the lower end of the gear cavity.

Referring to fig. 7, the driven assembly 3 includes a driven gear 31 and a driven shaft 32. The driven shaft 32 penetrates into the driven gear 31. The driving gear 21 and the driven gear 31 are located in the gear cavity and are engaged with each other.

The pump cover 11 is provided with a driving shaft hole II1101 and a driven shaft hole II1102 respectively corresponding to the driving shaft hole I4101 and the driven shaft hole I4102 of the pump body 41.

The pump cover 11 is further provided with an oil inlet groove II1103 and an oil outlet groove II1104 which are respectively matched with the oil inlet groove I4103 and the oil outlet groove I4104 of the pump body 41.

The pump cover 11 is fixed on the pump body 41 through screw connection, and for convenience of installation, a positioning pin 43 and a hollow pin 44 are installed on the pump body 41, a positioning hole is formed in the corresponding position of the pump cover 11, and the pump body 41 and the pump cover 11 are connected through screws after being positioned through the positioning pin 43 and the hollow pin 44. One end of the drive shaft 22 is mounted in the drive shaft hole I411 of the pump body 41, and the other end of the drive shaft 22 passes through the drive shaft hole II1101 of the pump cover 11. One end of the driven shaft 32 is press-fitted in the driven shaft hole I412 of the pump body 41 by interference fit, and the other end of the driven shaft 32 is press-fitted in the driven shaft hole II1102 of the pump body 41 by interference fit.

When the oil-saving device works, the driving shaft 22 is driven to rotate by external power, the driving shaft 22 drives the driving gear 21 and the driven gear 31 to rotate, oil flows into the oil inlet groove I4103 and the oil inlet groove II1103 from the oil inlet 4107, the driving gear 21 and the driven gear 31 rotate to bring the oil in the oil inlet groove I4103 and the oil inlet groove II1103 into the oil outlet groove I4104 and the oil outlet groove II1104, and finally the oil flows out through the oil outlet 4108.

Example 3:

the main structure of this embodiment is the same as that of embodiment 2, and further, a buffer groove I1107 extends from the side wall of the oil outlet groove II1104 close to the drive shaft hole II 1101. And a buffer groove II1108 extends on the side wall of the oil outlet groove II1104 close to the driven shaft hole II 1102.

Example 4:

the main structure of this embodiment is the same as that of embodiment 3, and further, the buffer groove I1107 and the buffer groove II1108 are rectangular grooves, the width of the rectangular groove is 4mm, and the depth of the rectangular groove is 2 mm.

Example 5:

the main structure of this embodiment is the same as that of embodiment 4, and further, the extending ends of the buffer groove I1107 and the buffer groove II1108 are both circular arcs. The included angle between the arc center line of the extending end of the buffer groove I1107 and the connecting line of the center of the driving shaft hole II1101 and the center of the driven shaft hole II1102 is written as psi, and the range of psi is 95 degrees. The included angle between the arc center line of the extending tail end of the buffer groove II1108 and the connecting line of the center of the driving shaft hole II1101 and the center of the driven shaft hole II1102 is recorded as sigma, and the range of the sigma is 95 degrees.

Example 6:

the main structure of this embodiment is the same as that of embodiment 2, and further, the oil outlet groove I4104 is communicated with the driven shaft hole I4102 by opening a lubricating oil groove I4105, and the oil outlet groove I4104 is communicated with the driving shaft hole I4101 by opening a lubricating oil groove II 4106.

The oil outlet groove II1104 is communicated with the driven shaft hole II1102 through a lubricating oil groove III1105, and the oil outlet groove II1104 is communicated with the driving shaft hole II1101 through a lubricating oil groove IV 1106. The lubricating oil groove III1105 is matched with the lubricating oil groove I4105, and the lubricating oil groove IV1106 is matched with the lubricating oil groove II 4106.

Example 7:

the main structure of this embodiment is the same as that of embodiment 2, and further, a pump body bushing 45 is press-fitted in the driving shaft hole I411 through interference fit, and the pump body bushing 45 is a bimetal rolled bushing.

And a pump cover bush 12 is press-fitted in the driving shaft hole II1101 through interference fit, and the pump cover bush 12 is a bimetal rolled bush.

A gear bush 33 is press-fitted into the driven gear 31 by interference fit. The gear bush 33 is a bimetal rolling bush.

Example 8:

the main structure of this embodiment is the same as embodiment 2, and further, a drain groove 41011 is formed at the bottom of the driving shaft hole I4101. An oil drainage port 4110 communicated with the oil drainage groove 41011 is formed in the side wall of the pump body 41.

Example 9:

the main structure of this embodiment is the same as that of embodiment 2, and further, the lubricating oil groove I4105, the lubricating oil groove II4106, the lubricating oil groove III1105 and the lubricating oil groove IV1106 are V-shaped grooves, the included angle of the V-shaped grooves is 60 °, and the groove depth is 0.8 mm.

Example 10:

the main structure of this embodiment is the same as that of embodiment 2, and further, the end of the driving shaft 22 that penetrates through the driving shaft hole II1101 has external splines. The drive shaft 22 is connected to external power by external splines.

Example 11:

the main structure of the present embodiment is the same as embodiment 2, and further, the driving gear 21 and the driven gearthe wheels 31 are all formed with a tooth angle α of 25 °, and a tooth height factor

Claims

1. An integrated form pump oily device which characterized in that: the pump cover assembly comprises a pump cover assembly (1), a driving assembly (2), a driven assembly (3) and a pump body assembly (4);

the main component of the pump body component (4) is a pump body (41);

the middle part of the pump body (41) is provided with a pair of gear cavities, and a driving shaft hole I (4101) and a driven shaft hole I (4102) are respectively arranged in the gear cavities; an oil inlet groove I (4103) and an oil outlet groove I (4104) are respectively formed in the upper end and the lower end of the gear cavity;

an oil inlet (4107) and an oil return opening (4109) communicated with the oil inlet groove I (4103) are formed in the side wall of the pump body (41); an oil outlet (4108) communicated with an oil outlet groove I (4104) is formed in the side wall of the pump body (41);

a piston control oil passage I (4111), a piston control oil passage II (4112), a piston control oil passage III (4113), a piston cylinder hole I (4114) and a piston cylinder hole II (4115) are formed in the side wall of the pump body (41); the piston cylinder hole II (4115) is respectively communicated with the piston control oil passage I (4111) and the piston control oil passage II (4112), and the piston control oil passage II (4112) is connected with the oil outlet (4108) through an external control oil passage and supplies oil to the piston cylinder hole II (4115); the piston cylinder hole I (4114) is communicated with a piston control oil passage III (4113), and the piston control oil passage III (4113) is connected with an oil outlet (4108) through an external control oil way and supplies oil to the piston cylinder hole I (4114); a gear shifting cylinder sleeve (42) is arranged in each of the piston cylinder hole II (4115) and the piston cylinder hole I (4114); a gear shifting piston connected with a gear shifting mechanism is arranged in the gear shifting cylinder sleeve (42);

an oil injection control pipeline oil inlet (4116) and an oil injection control pipeline oil outlet (4117) which are mutually communicated are formed in the side wall of the pump body (41); the oil inlet (4116) of the oil injection control pipeline is connected with the oil outlet (4108) through an external control oil way, and the oil outlet (4117) of the oil injection control pipeline is connected with an external oil injection control element;

an electronic pump valve interface (4118) and an electronic pump valve oil inlet (4119) which are mutually communicated are formed in the side wall of the pump body (41); an electronic pump valve interface (4118) is connected with an external electronic pump valve, and an oil inlet (4119) of the electronic pump valve is connected with an oil return port (4109) through an external control oil way;

the drive assembly (2) comprises a drive gear (21) and a drive shaft (22); the driving shaft (22) penetrates into the driving gear (21) and is fixed;

the driven assembly (3) comprises a driven gear (31) and a driven shaft (32); the driven shaft (32) penetrates into the driven gear (31); the driving gear (21) and the driven gear (31) are positioned in the gear cavity and are meshed with each other;

the main component of the pump cover assembly (1) is a pump cover (11);

the pump cover (11) is provided with a driving shaft hole II (1101) and a driven shaft hole II (1102) which are respectively matched with the driving shaft hole I (4101) and the driven shaft hole I (4102) of the pump body (41); and the pump cover (11) is also provided with an oil inlet groove II (1103) and an oil outlet groove II (1104) which are respectively matched with the oil inlet groove I (4103) and the oil outlet groove I (4104) of the pump body (41).

The pump cover (11) is arranged on the pump body (41); one end of the driving shaft (22) is installed in a driving shaft hole I (411) of the pump body (41), and the other end of the driving shaft (22) penetrates out of a driving shaft hole II (1101) of the pump cover (11); one end of the driven shaft (32) is installed in a driven shaft hole I (412) of the pump body (41), and the other end of the driven shaft (32) is installed in a driven shaft hole II (1102) of the pump body (41).

2. An integrated oil pumping device as claimed in claim 2, wherein:

a buffer groove I (1107) extends from the side wall of the oil outlet groove II (1104) close to the shaft hole II (1101) of the driving shaft; and a buffer groove II (1108) is extended on the side wall of the oil outlet groove II (1104) close to the driven shaft hole II (1102).

3. An integrated oil pumping device as claimed in claim 2, wherein: buffer slot I (1107) and buffer slot II (1108) are the rectangular channel, and the rectangular channel groove width is 2 ~ 4mm, and the groove depth is 1 ~ 2 mm.

4. An integrated oil pumping device according to claim 3, wherein: the extending tail ends of the buffer groove I (1107) and the buffer groove II (1108) are both circular arcs; recording the included angle of the arc center line of the extending tail end of the buffer groove I (1107) and the connecting line of the center of the driving shaft hole II (1101) and the center of the driven shaft hole II (1102) as psi, wherein the psi is in the range of 85-95 degrees; the included angle between the arc center line of the extending tail end of the buffer groove II (1108) and the connecting line of the center of the driving shaft hole II (1101) and the center of the driven shaft hole II (1102) is recorded as sigma, and the range of the sigma is 85-95 degrees.

5. An integrated oil pumping device as claimed in claim 1, wherein: the oil outlet groove I (4104) is communicated with the driven shaft hole I (4102) by arranging a lubricating oil groove I (4105), and the oil outlet groove I (4104) is communicated with the driving shaft hole I (4101) by arranging a lubricating oil groove II (4106);

the oil outlet groove II (1104) is communicated with the driven shaft hole II (1102) through a lubricating oil groove III (1105), and the oil outlet groove II (1104) is communicated with the driving shaft hole II (1101) through a lubricating oil groove IV (1106); the lubricating oil groove III (1105) is matched with the lubricating oil groove I (4105), and the lubricating oil groove IV (1106) is matched with the lubricating oil groove II (4106).

6. An integrated oil pumping device as claimed in claim 1, wherein: a pump body bush (45) is press-mounted in the driving shaft hole I (411) through interference fit, and the pump body bush (45) is a bimetal rolled bush;

a pump cover bush (12) is press-fitted in the driving shaft hole II (1101) in an interference fit manner, and the pump cover bush (12) is a bimetal rolled bush;

a gear bushing (33) is pressed in the driven gear (31) through interference fit; the gear bushing (33) is a bimetal rolling bushing.

7. An integrated oil pumping device as claimed in claim 1, wherein: an oil drainage groove (41011) is formed in the hole bottom of the driving shaft hole I (4101); an oil drainage port (4110) communicated with the oil drainage groove (41011) is formed in the side wall of the pump body (41).

8. An integrated oil pumping device as claimed in claim 1, wherein: the lubricating oil groove I (4105), the lubricating oil groove II (4106), the lubricating oil groove III (1105) and the lubricating oil groove IV (1106) are all V-shaped grooves, the included angle of each V-shaped groove is 60 degrees, and the groove depth is 0.5-0.8 mm.

9. An integrated oil pumping device as claimed in claim 1, wherein: the end part of the driving shaft (22) penetrating through the driving shaft hole II (1101) is provided with an external spline.

10. an integrated oil pumping device as claimed in claim 1, wherein the drive gear (21) and the driven gear (31) are both at a tooth form angle α of 25 ° and a tooth height factor

The long tooth profile involute gear of (1); the number of teeth of the driving gear (21) and the driven gear (31) is 10.