CN209782192U - Double-support rotor pump with idler gear - Google Patents
Double-support rotor pump with idler gear Download PDFInfo
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- CN209782192U CN209782192U CN201920458360.4U CN201920458360U CN209782192U CN 209782192 U CN209782192 U CN 209782192U CN 201920458360 U CN201920458360 U CN 201920458360U CN 209782192 U CN209782192 U CN 209782192U
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Abstract
The utility model provides a double-support rotor pump with an idler gear, which comprises a pump body, a pump cover, an inner rotor, an outer rotor, a transmission shaft, a transmission gear, an idler gear and an idler shaft; the inner rotor is fixed in the middle of the transmission shaft, two ends of the transmission shaft are respectively and rotatably arranged in the shaft holes of the pump body and the pump cover, and bushings are arranged in the shaft holes of the pump body and the pump cover in a pressure-sharing manner; the idler shaft is fixedly arranged on the pump body, a bush is pressed in a shaft hole of the idler gear, and the idler gear is rotatably arranged on the idler shaft through the bush; the transmission gear is fixedly arranged at one end of the transmission shaft and is meshed with the idle gear; the medial surface of pump cover is equipped with the shaft hole boss, and the position that inner rotor corresponds pump cover shaft hole boss is equipped with the recess. The shaft hole boss is arranged on the inner side surface of the pump cover, so that the length of the shaft hole of the pump cover is prolonged, and the support for the transmission shaft is enhanced; because the inner rotor is provided with the groove at the position corresponding to the boss of the shaft hole of the pump cover, the whole thickness and the rotation of the inner rotor cannot be influenced.
Description
Technical Field
The utility model relates to an engine lubrication system part, in particular to take rotor formula oil pump of idler gear.
Background
The existing large-displacement oil pump is usually installed in an oil shell below an engine crankcase, a transmission gear of the oil pump is driven by a gear on the engine crankshaft, the engine crankcase is very large, the center distance between a transmission shaft of the oil pump and the crankshaft is relatively large, and on the premise of determining the transmission ratio, if the center distance is matched by simply increasing the diameters of the transmission gear of the oil pump and the gear on the crankshaft, the gear on the crankshaft and the transmission gear of the oil pump are necessarily too large, so the cost is increased, and in addition, the engine does not have enough space for arranging the gear with the large diameter. Therefore, an idle gear must be added between the transmission gear of the oil pump and the crankshaft gear to transmit the driving force of the gear on the crankshaft to the transmission gear of the oil pump, so that the cost can be reduced, and the structure of the engine is more compact.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a take idle gear's dual bracing gerotor pump, this kind of gerotor pump can strengthen the support to the transmission shaft under the prerequisite that does not increase pump cover thickness.
In order to solve the technical problem, the utility model discloses a following technical scheme: a double-support rotor pump with an idler gear comprises a pump body, a pump cover, an inner rotor, an outer rotor, a transmission shaft, a transmission gear, an idler gear and an idler shaft; the pump body is provided with a shaft hole and a rotor cavity, the pump cover is provided with a shaft hole, an oil inlet and an oil outlet, and bushings are mounted in the shaft holes of the pump body and the pump cover in a pressure-equalizing manner; the inner rotor is fixed in the middle of the transmission shaft, and two ends of the transmission shaft are respectively and rotatably arranged in the shaft holes of the pump body and the pump cover; the idler shaft is fixedly arranged on the pump body, a bushing is pressed in a shaft hole of the idler gear, and the idler gear is rotatably arranged on the idler shaft through the bushing; the transmission gear is fixedly arranged at one end of the transmission shaft and is meshed with the idle gear; the inner side of the pump cover is provided with a shaft hole boss, and a groove is formed in the position, corresponding to the shaft hole boss of the pump cover, of the inner rotor.
In the technical scheme, the shaft hole boss is arranged on the inner side surface of the pump cover, so that the length of the shaft hole of the pump cover is prolonged, and the support for the transmission shaft is enhanced; because the inner rotor is provided with the groove at the position corresponding to the boss of the shaft hole of the pump cover, the whole thickness and the rotation of the inner rotor cannot be influenced.
The utility model discloses further technical scheme is: the pump body is characterized in that a low-pressure oil groove and a high-pressure oil groove are arranged at the bottom of a rotor cavity of the pump body, one end of the high-pressure oil groove is provided with two extended optimization grooves, one of the optimization grooves close to the outside is a pressure fluctuation optimization groove, the other optimization groove close to the inside is a cavitation optimization groove, the cavitation optimization groove is communicated with the rotor oil absorption maximum volume cavity, and the pressure fluctuation optimization groove is not communicated with the rotor oil absorption maximum volume cavity.
Furthermore, two extended optimization grooves are also formed in one end of the oil outlet on the inner side face of the pump cover, wherein the outer one is a pressure fluctuation optimization groove, and the inner one is a cavitation optimization groove.
Because the cavitation optimization groove is communicated with the maximum volume cavity (when oil is absorbed, the cavity is in partial vacuum) for absorbing oil of the rotor, when the oil is not absorbed sufficiently, the oil in the high-pressure oil groove can supplement the oil liquid into the maximum volume cavity through the cavitation optimization groove, gas is reduced from being brought into the high-pressure cavity, the cavitation is optimized, and meanwhile, the effect of optimizing pressure fluctuation can be achieved.
Further, the bottom of the high-pressure oil groove of the pump body is provided with a slope.
Further, the pump body and the idler shaft are provided with lubricating oil passages communicated with each other, and the lubricating oil passages are used for supplying lubricating oil to a gap between the idler shaft and the idler gear bush.
preferably, a first lubricating oil channel is arranged on the pump body, an axial second lubricating oil channel is arranged on the idler shaft, a hole A butted with the first lubricating oil channel is formed in one end of the second lubricating oil channel, a hole B for lubricating the idler gear bush is formed in the other end of the second lubricating oil channel, the hole A and the hole B are radial holes, and the aperture of the hole A is smaller than that of the first lubricating oil channel. The aperture of the hole A is smaller than that of the first lubricating oil channel, so that a damping effect can be achieved, and pressure fluctuation of lubricating oil of the idle gear bush is reduced.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;
Fig. 2 is a schematic view of a pump body structure in an embodiment of the present invention;
fig. 3 is a schematic structural view of an inner side surface of a pump cover in an embodiment of the present invention;
Fig. 4 is a schematic structural view of the pump body provided with the inner rotor and the outer rotor in the embodiment of the present invention;
The reference signs are:
1-pump body 2-pump cover 3-inner rotor
4-external rotor 5-transmission shaft 6-transmission gear
7-idler gear 8-idler shaft 9-low pressure oil groove
10-high pressure oil groove 101-pressure fluctuation optimization groove
102-cavitation optimization groove 11-first lubricating oil channel
12-second lubricating oil channel 121-A hole 122-B hole
21-shaft hole boss 22-oil inlet 23-oil outlet.
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 "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. 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, the preferred embodiment of the present invention is: a double-support rotor pump with an idler gear comprises a pump body 1, a pump cover 2, an inner rotor 3, an outer rotor 4, a transmission shaft 5, a transmission gear 6, an idler gear 7 and an idler shaft 8; the pump body 1 is provided with a shaft hole and a rotor cavity, the pump cover 2 is provided with a shaft hole, an oil inlet 22 and an oil outlet 23, and bushings are mounted in the shaft holes of the pump body 1 and the pump cover 2 in a pressure-equalizing manner; the inner rotor 3 is fixed in the middle of the transmission shaft 5, and two ends of the transmission shaft 5 are respectively and rotatably arranged in shaft holes of the pump body 1 and the pump cover 2; the idler shaft 8 is fixedly arranged on the pump body 1, a bush is pressed in a shaft hole of the idler gear 7, and the idler gear 7 is rotatably arranged on the idler shaft 8 through the bush; the transmission gear 6 is fixedly arranged at one end of the transmission shaft 5 and is meshed with the idle gear 7; the medial surface of pump cover 2 is equipped with shaft hole boss 21, the position that inner rotor 3 corresponds pump cover shaft hole boss 21 is equipped with the recess.
In the technical scheme, the shaft hole boss 21 is arranged on the inner side surface of the pump cover 2, so that the length of the shaft hole of the pump cover 1 is prolonged, and the support for the transmission shaft is enhanced; because the inner rotor 3 is provided with the groove at the position corresponding to the boss 21 of the shaft hole of the pump cover, the whole thickness and the rotation of the inner rotor 3 can not be influenced.
As shown in fig. 2, 3 and 4, the bottom of the rotor cavity of the pump body 1 is provided with a low-pressure oil groove 9 and a high-pressure oil groove 10, the bottom of the high-pressure oil groove 10 of the pump body 1 is provided with an inclined plane, one end of the high-pressure oil groove 10 is provided with two extended optimization grooves, wherein the outer one is a pressure fluctuation optimization groove 101, the inner one is a cavitation optimization groove 102, the cavitation optimization groove 102 is communicated with the maximum volume cavity of the rotor oil absorption, and the pressure fluctuation optimization groove 101 is not communicated with the maximum volume cavity of the rotor oil absorption. Correspondingly, two extended optimization grooves are also formed in one end of the oil outlet on the inner side face of the pump cover, wherein the outer one is a pressure fluctuation optimization groove 101, and the inner one is a cavitation optimization groove 102. Because the cavitation optimization groove 102 is communicated with the maximum volume cavity (when oil is absorbed, the cavity is partially vacuum) for oil absorption of the rotor, when the oil is not sufficiently absorbed, the oil in the high-pressure oil groove 10 can supplement the oil into the maximum volume cavity through the cavitation optimization groove 102, so that the gas brought into the high-pressure cavity is reduced, the cavitation is optimized, and the effect of optimizing pressure fluctuation can be achieved.
As shown in fig. 1, a lubricating oil passage which is communicated with each other is arranged on the pump body 1 and the idler shaft 8, the lubricating oil passage is used for providing lubricating oil for a gap between the idler shaft 8 and an idler gear 7 bush, wherein a first lubricating oil passage 11 is arranged on the pump body, an axial second lubricating oil passage 12 is arranged on the idler shaft, one end of the second lubricating oil passage 12 is provided with an a hole 121 which is butted with the first lubricating oil passage 11, the other end of the second lubricating oil passage is provided with a B hole 122 which is used for lubricating the idler gear bush, the a hole 121 and the B hole 122 are both radial holes, and the aperture of the a hole 121 is smaller than that of the first lubricating. Since the aperture of the a hole 121 is smaller than that of the first lubricating oil passage 11, a damping effect can be achieved, and pressure fluctuation of the lubricating oil of the idle gear bush can be reduced.
The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.
In order to make it easier for those skilled in the art to understand the improvement of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and in order to clarify, some other elements have been omitted from this document, those skilled in the art should recognize that these omitted elements may also constitute the content of the present invention.
Claims (6)
1. A double-support rotor pump with an idler gear comprises a pump body (1), a pump cover (2), an inner rotor (3), an outer rotor (4), a transmission shaft (5), a transmission gear (6), an idler gear (7) and an idler shaft (8); the method is characterized in that: the pump body (1) is provided with a shaft hole and a rotor cavity, the pump cover (2) is provided with a shaft hole, an oil inlet (22) and an oil outlet (23), and bushings are mounted in the shaft holes of the pump body (1) and the pump cover (2) in a pressure-equalizing manner; the inner rotor (3) is fixed in the middle of the transmission shaft (5), and two ends of the transmission shaft (5) are respectively and rotatably arranged in shaft holes of the pump body (1) and the pump cover (2); the idler shaft (8) is fixedly arranged on the pump body (1), a bush is pressed in a shaft hole of the idler gear (7), and the idler gear (7) is rotatably arranged on the idler shaft (8) through the bush; the transmission gear (6) is fixedly arranged at one end of the transmission shaft (5) and is meshed with the idle gear (7); the inner side surface of the pump cover (2) is provided with a shaft hole boss (21), and a groove is formed in the position, corresponding to the pump cover shaft hole boss (21), of the inner rotor (3).
2. A dual support rotor pump with idler gears as set forth in claim 1 wherein: the pump body (1) rotor chamber bottom is equipped with low pressure oil groove (9) and high pressure oil groove (10), the one end of high pressure oil groove (10) is equipped with the optimization groove of two extensions, and wherein lean on outer one for pressure fluctuation optimization groove (101), lean on interior one for cavitation erosion optimization groove (102), cavitation optimization groove (102) communicate with each other with the maximum volume chamber of rotor oil absorption, pressure fluctuation optimization groove (101) do not communicate with each other with the maximum volume chamber of rotor oil absorption.
3. A dual support rotor pump with idler gears as set forth in claim 2 wherein: and one end of the oil outlet is also provided with two extended optimization grooves on the inner side surface of the pump cover, wherein the outer one is a pressure fluctuation optimization groove (101), and the inner one is a cavitation optimization groove (102).
4. A dual support rotor pump with idler gears as set forth in claim 2 wherein: the bottom of the high-pressure oil groove (10) of the pump body (1) is provided with an inclined plane.
5. A double support rotor pump with idler gear according to claim 1 or claim 2 wherein: and the pump body (1) and the idler shaft (8) are provided with lubricating oil channels which are communicated with each other, and the lubricating oil channels are used for providing lubricating oil for a gap between the idler shaft (8) and a bush of the idler gear (7).
6. a dual support rotor pump with idler gears as set forth in claim 4 wherein: the lubricating oil pump is characterized in that a first lubricating oil channel (11) is arranged on the pump body (1), an axial second lubricating oil channel (12) is arranged on the idler shaft (8), an A hole (121) butted with the first lubricating oil channel (11) is formed in one end of the second lubricating oil channel (12), a B hole (122) used for lubricating a bush of the idler gear (7) is formed in the other end of the second lubricating oil channel, the A hole (121) and the B hole (122) are radial holes, and the aperture of the A hole (121) is smaller than that of the first lubricating oil channel (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920458360.4U CN209782192U (en) | 2019-04-08 | 2019-04-08 | Double-support rotor pump with idler gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920458360.4U CN209782192U (en) | 2019-04-08 | 2019-04-08 | Double-support rotor pump with idler gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209782192U true CN209782192U (en) | 2019-12-13 |
Family
ID=68801683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920458360.4U Active CN209782192U (en) | 2019-04-08 | 2019-04-08 | Double-support rotor pump with idler gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209782192U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869621A (en) * | 2019-04-08 | 2019-06-11 | 湖南机油泵股份有限公司 | A kind of dual-gripper impeller pump with idle gear |
-
2019
- 2019-04-08 CN CN201920458360.4U patent/CN209782192U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869621A (en) * | 2019-04-08 | 2019-06-11 | 湖南机油泵股份有限公司 | A kind of dual-gripper impeller pump with idle gear |
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