阅读说明：本技术 一种可变排量的转子机油泵 (Variable-displacement rotor oil pump ) 是由 唐业和 许仲秋 刘光明 佘笑梅 于 2020-05-08 设计创作，主要内容包括：本发明提供了一种可变排量的转子机油泵,包括泵体、泵盖、内转子、外转子、偏心齿环及伺服电机；泵体上设有容纳偏心齿环的腔体,腔体底部设有第一油槽、第二油槽；偏心齿环与泵体的腔体为间隙配合,偏心齿环的外周设有渐开线齿,偏心齿环齿顶DA中心与容纳外转子的内孔D中心存在偏心距e,所述偏心距e为内转子与外转子的偏心距；伺服电机通过螺钉B固定在泵体上,伺服电机的传动轴上设有螺旋齿,所述螺旋齿与偏心齿环外侧的渐开线齿相啮合,使所述传动轴和所述偏心齿环构成涡轮蜗杆机构,在伺服电机传动轴的驱动下,偏心齿环能够在腔体内进行顺时针或逆时针旋转,从而改变偏心齿环与腔体底部第一油腔和第二油腔的夹角,实现排量可变。(The invention provides a variable-displacement rotor oil pump which comprises a pump body, a pump cover, an inner rotor, an outer rotor, an eccentric gear ring and a servo motor, wherein the pump cover is arranged on the pump body; a cavity for accommodating the eccentric gear ring is arranged on the pump body, and a first oil groove and a second oil groove are arranged at the bottom of the cavity; the eccentric gear ring is in clearance fit with a cavity of the pump body, involute teeth are arranged on the periphery of the eccentric gear ring, an eccentric distance e exists between the center of the tooth top DA of the eccentric gear ring and the center of an inner hole D for accommodating the outer rotor, and the eccentric distance e is the eccentric distance between the inner rotor and the outer rotor; the servo motor is fixed on the pump body through a screw B, and the transmission shaft of the servo motor is provided with spiral teeth, the spiral teeth are meshed with involute teeth on the outer side of the eccentric gear ring, so that the transmission shaft and the eccentric gear ring form a worm and gear mechanism, and the eccentric gear ring can rotate clockwise or anticlockwise in the cavity under the driving of the transmission shaft of the servo motor, so that the included angle between the eccentric gear ring and the first oil cavity and the second oil cavity at the bottom of the cavity is changed, and the variable displacement is realized.)

1. A variable displacement rotor oil pump characterized by: comprises a pump body (11), a pump cover (2), an inner rotor (5), an outer rotor (6), an eccentric gear ring (7) and a servo motor (10); a cavity (117) for accommodating the eccentric gear ring (7) is arranged on the pump body (11), a first oil groove (113) and a second oil groove (114) are arranged at the bottom of the cavity (117), wherein the first oil groove (113) is connected with an oil inlet (118) through an oil duct, and the second oil groove (114) is connected with an oil outlet (119) through an oil duct; the eccentric gear ring (7) is in clearance fit with a cavity (117) of the pump body, involute teeth (72) are arranged on the periphery of the eccentric gear ring (7), an eccentric distance e exists between the center of the tooth top DA of the eccentric gear ring (7) and the center of an inner hole D for accommodating the outer rotor (6), and the eccentric distance e is the eccentric distance between the inner rotor (5) and the outer rotor (6); servo motor (10) are fixed on the pump body (11) through screw B (9), be equipped with spiral tooth (104) on transmission shaft (103) of servo motor (10), spiral tooth (104) mesh mutually with involute tooth (72) in the eccentric ring gear (7) outside, make transmission shaft (103) with eccentric ring gear (7) constitute turbine worm mechanism, under the drive of servo motor (10) transmission shaft, eccentric ring gear (7) can carry out clockwise or anticlockwise rotation in the cavity of the pump body (11) to change the contained angle of eccentric ring gear (7) and first oil pocket (113) in cavity bottom and second oil pocket (114).

2. The variable displacement rotor oil pump of claim 1, wherein: the inner rotor (5) can drive the outer rotor (6) to rotate clockwise and anticlockwise in the eccentric gear ring (7) under the driving of the rotating shaft.

3. The variable displacement rotor oil pump according to claim 1 or 2, characterized in that: the servo motor (10) is provided with a cable plug (101) for connecting an engine ECU (electronic control unit) or a transmission TCU (transmission control unit) which sends a signal instruction to control a transmission shaft (103) of the servo motor (10) to rotate according to the system flow or pressure requirement, and spiral teeth (104) of the transmission shaft (103) drive an eccentric gear ring (7) to rotate 360 degrees in a cavity (117) of a pump body (11).

4. The variable displacement rotor oil pump according to claim 1 or 2, characterized in that: the pump body (11) is provided with a through hole (112) or a groove for accommodating the transmission shaft (103), and the through hole (112) or the groove is communicated with the cavity (117).

5. The variable displacement rotor oil pump according to claim 1 or 2, characterized in that: the inner side section of the shaft hole of the inner rotor (5) is provided with two symmetrical flat tails (51), and the flat square of an engine crankshaft or a transmission input shaft passes through the shaft hole of the inner rotor (5) to be matched with the flat tails (51) to drive the inner rotor to rotate clockwise or anticlockwise so that the oil pump works; bushing (4) and be interference fit are equipped with to the shaft hole outside section of inner rotor (5), pump cover (2) medial surface is equipped with an annular boss (21), annular boss (21) periphery is pressed with interference fit's mode and is equipped with one axle sleeve (3), annular boss (21) and axle sleeve (3) stretch into extremely interior inner rotor (5) of bushing (4) are fixed a position, pump cover (2) are fixed a position through locating pin (8) with pump body (11) to lock through screw A (1).

6. The variable displacement rotor oil pump according to claim 1 or 2, characterized in that: a first mark point (115) and a second mark point (116) which are symmetrical in position are arranged around a cavity (117) of the pump body, and a third mark point (71) is arranged on the eccentric gear ring (7); when the third marking point (71) is aligned with the first marking point (115), the oil pump can rotate anticlockwise; when the third marking point (71) is aligned with the second marking point (116), the oil pump may perform clockwise rotation.

Technical Field

The invention relates to the technical field of internal combustion engine lubricating systems or transmission lubricating hydraulic systems, in particular to a variable-displacement rotor oil pump.

Background

the variable structure of the single-acting vane pump is more complex, while the stator of the floating structure reduces the reliability of the oil pump, the performance of the pump is reduced to different degrees under the working conditions of large flow, low speed and high speed, the variable structure of the gear pump is more complex, the cost is higher, the important performance indexes of the total efficiency, noise, corresponding time, and the like, the single-acting vane pump and the rotor pump are not used for the high-power commercial vehicle engine, the variable structure of the gear pump is more complex, the oil pressure consumption is not increased, the oil pressure is not increased, the oil supply is not increased, the oil pressure is increased, and the oil supply is not required to be reduced.

Disclosure of Invention

The invention aims to provide a variable-displacement rotor oil pump which is simple and compact in structure and high in reliability.

In order to solve the technical problems, the technical scheme of the variable displacement rotor oil pump is as follows: a variable displacement rotor oil pump comprises a pump body, a pump cover, an inner rotor, an outer rotor, an eccentric gear ring and a servo motor; the pump body is provided with a cavity for accommodating the eccentric gear ring, and the bottom of the cavity is provided with a first oil groove and a second oil groove, wherein the first oil groove is connected with the oil inlet through an oil duct, and the second oil groove is connected with the oil outlet through an oil duct; the eccentric gear ring is in clearance fit with a cavity of the pump body, involute teeth are arranged on the periphery of the eccentric gear ring, an eccentric distance e exists between the center of the tooth top DA of the eccentric gear ring and the center of an inner hole D for accommodating the outer rotor, and the eccentric distance e is the eccentric distance between the inner rotor and the outer rotor; the servo motor passes through screw B to be fixed on the pump body, be equipped with the helical tooth on servo motor's the transmission shaft, the helical tooth meshes with the involute tooth in the eccentric ring gear outside mutually, makes the transmission shaft with the eccentric ring gear constitutes turbine worm mechanism, under the drive of servo motor transmission shaft, the eccentric ring gear can carry out clockwise or anticlockwise rotation in the cavity of the pump body to change the contained angle of eccentric ring gear and the first oil pocket in cavity bottom and second oil pocket.

Among the above-mentioned technical scheme, because eccentric ring gear can carry out clockwise or anticlockwise rotation in the cavity of the pump body to change the contained angle of eccentric ring gear and cavity bottom first oil pocket and second oil pocket, and then just can change the sealed effective area of rotor and reach the variable displacement effect, make the effective discharge capacity of oil pump be less than theoretical discharge capacity, reduce the engine and do work, thereby realize energy saving and consumption reduction.

Further, the inner rotor can drive the outer rotor to rotate clockwise and anticlockwise in the eccentric gear ring under the driving of the rotating shaft. When the eccentric gear ring rotates 180 degrees to realize the reverse eccentricity e, the oil pump can realize reverse oil supply and the oil inlet and outlet channels can be kept unchanged, and the working condition can meet the requirements of a lubricating system and a hydraulic system for oil when the new energy automobile backs. The conventional lubricating and hydraulic transmission solution of the new energy automobile usually adopts a mode of combining a mechanical oil pump and an electronic oil pump, when a motor rotates forwards, the mechanical oil pump works and the electronic oil pump works in an electronic auxiliary mode, and when the motor rotates backwards, the mechanical oil pump is disconnected for transmission through a clutch and only the electronic oil pump works, so that the control strategy and the whole hydraulic system are complex and tedious; and this technical scheme just can realize above-mentioned all functions through single oil pump, and simple structure, the reliability is high.

The servo motor is provided with a cable plug used for being connected with an engine ECU (electronic control Unit) or a transmission TCU (transmission control Unit), the ECU or the TCU sends a signal instruction to control a transmission shaft of the servo motor to rotate according to the system flow or pressure requirement, and spiral teeth of the transmission shaft drive an eccentric gear ring to rotate 360 degrees in a cavity of the pump body.

Furthermore, the pump body is provided with a through hole or a groove for accommodating the transmission shaft, and the through hole or the groove is communicated with the cavity.

Furthermore, two symmetrical flat tails are arranged on the inner side section of the inner rotor shaft hole, and a flat square of an engine crankshaft or a transmission input shaft penetrates through the inner rotor shaft hole to be matched with the flat tails to drive the inner rotor to rotate clockwise or anticlockwise so that the oil pump works; the pump cover is characterized in that a bush is arranged on the outer side section of the shaft hole of the inner rotor and is in interference fit, an annular boss is arranged on the inner side face of the pump cover, a shaft sleeve is arranged on the periphery of the annular boss in a pressing mode in the interference fit mode, the annular boss and the shaft sleeve stretch into the bush to position the inner rotor, and the pump cover and the pump body are positioned through a positioning pin and locked through a screw.

Furthermore, a first mark point and a second mark point which are symmetrical in position are arranged around the cavity of the pump body, and a third mark point is arranged on the eccentric gear ring; when the third marking point is aligned with the first marking point, the oil pump can rotate counterclockwise; when the third mark point is aligned with the second mark point, the oil pump may perform clockwise rotation. The mark points are arranged on the pump body and the eccentric gear ring, so that the assembly precision of the eccentric gear ring and the pump body is improved.

Drawings

FIG. 1 is a schematic diagram of an explosion structure of an oil pump according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an overall structure of an oil pump without a pump cover in the embodiment of the invention;

FIG. 3 is a schematic view of the pump body of FIG. 1;

FIG. 4 is a schematic view of the eccentric ring gear of FIG. 1;

FIG. 5 is a schematic diagram of the servo motor shown in FIG. 1;

Fig. 6 is a schematic view of the inner rotor structure of fig. 1;

FIG. 7 is a left side view of FIG. 6;

FIG. 8 is a schematic diagram of the pump cover structure of FIG. 1;

The reference signs are:

1-screw A2-pump cover 3-shaft sleeve

4-lining 5-inner rotor 6-outer rotor

7-eccentric toothed ring 8-positioning pin 9-screw B

10-servo motor 101-cable plug 102-nail through hole

103-transmission shaft 104-helical tooth 11-pump body

111-screw hole 112-through hole 113-first oil groove

114-second oil groove 115-first marking point 116-second marking point

117-cavity 118-oil inlet 119-oil outlet

21-annular boss 51-flat tail 71-third mark point

72-involute teeth.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but 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, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or interconnected between two elements, directly or indirectly through intervening media, and the specific meaning of the terms may be understood by those skilled in the art according to their specific situation.

As shown in fig. 1 to 8, the preferred embodiment of the present invention is: a variable displacement rotor oil pump comprises a pump body 11, a pump cover 2, an inner rotor 5, an outer rotor 6, an eccentric gear ring 7 and a servo motor 10; a cavity 117 for accommodating the eccentric gear ring 7 is arranged on the pump body 11, a first oil groove 113 and a second oil groove 114 are arranged at the bottom of the cavity 117, wherein the first oil groove 113 is connected with an oil inlet 118 through an oil passage, and the second oil groove 114 is connected with an oil outlet 119 through an oil passage; the eccentric gear ring 7 is in clearance fit with a cavity 117 of the pump body, involute teeth 72 are arranged on the periphery of the eccentric gear ring 7, an eccentric distance e exists between the center of the tooth top DA of the eccentric gear ring 7 and the center of an inner hole D for accommodating the outer rotor, and the eccentric distance e is the eccentric distance between the inner rotor 5 and the outer rotor 6; the servo motor 10 is fixed on the pump body 11 through a screw B9, a transmission shaft 103 of the servo motor 10 is provided with a spiral tooth 104, the spiral tooth 104 is meshed with an involute tooth 72 on the outer side of an eccentric toothed ring 7, so that the transmission shaft 103 and the eccentric toothed ring 7 form a worm gear mechanism, the eccentric toothed ring 7 can rotate clockwise or anticlockwise in a cavity 117 of the pump body under the driving of the transmission shaft 103 of the servo motor, the included angle between the eccentric toothed ring 7 and a first oil cavity 113 and a second oil cavity 114 at the bottom of the cavity is changed, the effective sealing area of a rotor can be changed to achieve a variable displacement effect, the effective displacement of an oil pump is smaller than the theoretical displacement, the work of an engine is reduced, and energy conservation and consumption reduction are realized.

As shown in fig. 3, the pump body 11 is provided with four screw holes 111 for fixing the servo motor 10, and a through hole 112 or a groove for accommodating the transmission shaft 103, the through hole 112 or the groove being communicated with the cavity 117; as shown in fig. 5, four nail passing holes 102 are provided on the servo motor 10. During installation, the transmission shaft 103 of the servo motor 10 is inserted into the through hole 112 or the groove on the pump body, and then the four screws 1 are respectively threaded through the four screw passing holes 102 of the servo motor 10 and screwed into the four screw holes 111 of the pump body 11, so that the servo motor 10 can be fixed on the pump body 11.

As shown in fig. 5, a cable plug 101 for connecting an engine ECU or a transmission TCU is provided on the servo motor 10, the ECU or the TCU sends a signal command to control a transmission shaft 103 of the servo motor 10 to rotate according to a system flow or a pressure demand, and a helical tooth 104 of the transmission shaft 103 drives the eccentric gear ring 7 to rotate 360 ° in a cavity 117 of the pump body 11.

As shown in fig. 6 and 7, the shaft hole of the inner rotor is a stepped hole, two symmetrical flat tails 51 are arranged at the inner section of the shaft hole of the inner rotor 5, and the flat side of the engine crankshaft or the transmission input shaft passes through the shaft hole of the inner rotor 5 and is matched with the flat tails 51 to drive the inner rotor 5 to rotate clockwise or counterclockwise so as to enable the oil pump to work; the outer section of the shaft hole of the inner rotor 5 is provided with a bushing 4 which is in interference fit; as shown in fig. 8, the inner side surface of the pump cover 2 is provided with an annular boss 21, and the outer periphery of the annular boss 21 is press-fitted with a shaft sleeve 3 in an interference fit manner; the annular boss 21 and the shaft sleeve 3 extend into the bushing 4 to position the inner rotor 5, and the pump cover 2 and the pump body 11 are positioned through the positioning pin 8 and locked through a screw A1. The inner rotor 5 can drive the outer rotor 6 to rotate clockwise and anticlockwise in the eccentric gear ring 7 under the driving of a flat square. When the eccentric gear ring 7 rotates 180 degrees to realize the reverse eccentricity e, the oil pump can realize reverse oil supply and the oil inlet and outlet channels can be kept unchanged, and the working condition can meet the requirements of a lubricating system and a hydraulic system for oil when the new energy automobile backs. The conventional lubricating and hydraulic transmission solution of the new energy automobile usually adopts a mode of combining a mechanical oil pump and an electronic oil pump, when a motor rotates forwards, the mechanical oil pump works and the electronic oil pump works in an electronic auxiliary mode, and when the motor rotates backwards, the mechanical oil pump is disconnected for transmission through a clutch and only the electronic oil pump works, so that the control strategy and the whole hydraulic system are complex and tedious; and the technical scheme of this embodiment just can realize above-mentioned all functions through single oil pump, and simple structure, the reliability is high.

As shown in fig. 3 and 4, a first marker point 115 and a second marker point 116 are symmetrically arranged around a cavity 117 of the pump body 11, and a third marker point 71 is arranged on the eccentric gear ring 7; when the third marking point 71 is aligned with the first marking point 115, the oil pump may rotate counterclockwise; when the third marking point 71 is aligned with the second marking point 116, the oil pump may perform clockwise rotation. The mark points are arranged on the pump body 11 and the eccentric gear ring 7, so that the assembly precision of the eccentric gear ring 7 and the pump body 11 is improved.

The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.

Some of the drawings and descriptions of the present invention have been simplified to facilitate the understanding of the improvements over the prior art by those skilled in the art, and some other elements have been omitted from this document for the sake of clarity, and it should be appreciated by those skilled in the art that such omitted elements may also constitute the subject matter of the present invention.