CN209782193U - Gear type oil pump convenient for adjusting lubricating position of idler shaft bushing - Google Patents
Gear type oil pump convenient for adjusting lubricating position of idler shaft bushing Download PDFInfo
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- CN209782193U CN209782193U CN201920458494.6U CN201920458494U CN209782193U CN 209782193 U CN209782193 U CN 209782193U CN 201920458494 U CN201920458494 U CN 201920458494U CN 209782193 U CN209782193 U CN 209782193U
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- oil
- idler shaft
- pump
- gear
- plunger
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Abstract
A gear type oil pump convenient for adjusting the lubricating position of an idler shaft bushing comprises a pump body and a pump cover, wherein an idler shaft hole, a low-pressure oil cavity, a high-pressure oil cavity and a pressure limiting valve are arranged on the pump body, the bushing is arranged in the idler shaft hole in a pressing mode, an idler shaft is arranged in the bushing, an idler gear is arranged on the idler shaft, the pressure limiting valve comprises a plunger, a spring and a plug screw, an oil inlet and an oil outlet are formed in the pump cover, an oil through hole is formed in the pump body, an annular oil groove is formed in the outer peripheral surface of the idler shaft, an inclined oil passage is arranged in the idler shaft, one end of the inclined oil passage; the plunger is provided with an arc-shaped oil discharge groove, a chamfer is arranged at one end of the cylindrical part close to the plug screw, a first oil duct arranged on the pump body is communicated with a second oil duct arranged on the pump cover, and the second oil duct is communicated with the oil inlet cavity. The gear type oil pump is convenient for lubricating an idler shaft bushing, and the plunger type pressure limiting valve on the pump body is not easy to be blocked, so that the gear type oil pump has a very wide application prospect.
Description
Technical Field
The utility model relates to an engine lubrication system technical field, in particular to gear formula oil pump convenient to adjust the lubricated position of idler shaft bush.
Background
The engine oil pump in the lubricating system is used for forcibly pressing and conveying the engine oil to the motion surface of each part of the engine after the engine oil is increased to a certain pressure, and the structural form of the engine oil pump can be divided into a gear type engine oil pump and a rotor type engine oil pump.
The existing large-displacement gear type 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 an engine crankshaft, the engine crankcase is very large, the center distance between an oil pump transmission shaft and the crankshaft is relatively large, on the premise of determining the transmission ratio, if the center distance is matched by simply increasing the diameters of the oil pump transmission gear and the gear on the crankshaft, the gear on the crankshaft and the oil pump transmission gear are necessarily too large, so that the cost is increased, in addition, the engine does not have enough space for arranging the gear with the large diameter, so an idle gear is usually added between the oil pump transmission gear and the crankshaft gear to transmit the gear driving force on the crankshaft to the oil pump transmission gear. To extend the useful life of the idler gear, it is necessary to lubricate the bushings mounted on the idler shaft. At present, a through oil duct needs to be arranged inside an idler shaft when engine oil in a high-pressure oil cavity is introduced into a bushing of the idler shaft, and then an opening is formed in a pump body so that the engine oil in the high-pressure oil cavity can enter one end of the oil duct through the opening and flow into the bushing through the interior of the idler shaft. However, a problem arises in that since the shaft hole of the idler shaft is previously opened and then the idler shaft is put into the shaft hole, the oil passage end of the idler shaft and the opening hole in the pump body are both small and difficult to align, and such a structure is also not favorable for adjusting the direct lubrication position of the bushing.
The continuous work of the oil pump can cause the phenomenon of overhigh oil pressure inside the oil pump, which can cause unnecessary efficiency consumption, so that a pressure limiting valve is required to be arranged on an outlet pipeline of the oil pump, and the pressure inside the oil pump is adjusted by the aid of the pressure limiting valve. In the prior art, a plunger type pressure limiting valve is a commonly used pressure limiting valve, when the oil pressure is too high, the stroke of the plunger is adjusted by a spring and the oil pressure in a pressure relief cavity, and lubricating oil flows out from an oil drainage port, so that the pressure relief is realized. Thus, there is a problem that when the plunger moves downward to contact the plug screw after the valve is opened, the oil is easily discharged from the pressure limiting valve, and the valve is thus locked.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a gear type oil pump convenient to adjust idle shaft bushing's lubricated position, this gear type oil pump are convenient for lubricate the idle shaft bushing, and the plunger type voltage limiting valve of the installation in the pump body has that the oil extraction is smooth and easy, the difficult dead advantage of holding back.
In order to solve the technical problem, the utility model discloses a following technical scheme: a gear type oil pump convenient for adjusting the lubricating position of an idler shaft bushing comprises a pump body and a pump cover, wherein an idler shaft hole, an oil inlet cavity, a high-pressure oil cavity and a pressure limiting valve are arranged on the pump body, a bushing is arranged in the idler shaft hole in a pressing mode, an idler shaft is arranged in the bushing, an idler gear is arranged on the idler shaft and meshed with a transmission gear, the transmission gear is arranged on a driving shaft, a driving gear is arranged in the middle of the driving shaft and meshed with a driven gear, the driven gear is arranged on a driven shaft, the pressure limiting valve comprises a plunger, a spring and a screw plug, an oil inlet and an oil outlet are arranged on the pump cover, an oil through hole used for communicating the high-pressure oil cavity with the idler shaft hole is formed in the pump body, an annular oil groove is formed in the peripheral surface of the idler, one end of the inclined oil duct is communicated with the annular oil groove, and the other end of the inclined oil duct corresponds to the position of the bushing; the plunger comprises a cylindrical part for mounting a spring, one end of the cylindrical part close to the screw plug is provided with a plurality of arc-shaped oil discharge grooves, and a chamfer is arranged at the joint between the outer peripheral surface of the cylindrical part and the end surface of the cylindrical part close to the screw plug, so that a circle of circumferential oil guide groove is formed between the bottom end of the cylindrical part and the plug screw after the cylindrical part of the plunger is contacted with the plug screw, the pump body is provided with a first oil duct which is positioned at one side of the oil discharge groove, the pump cover is provided with a second oil duct, the first oil duct is communicated with the second oil duct, the second oil duct is communicated with the oil inlet cavity, when the plunger moves downwards and contacts with the plug screw, the lubricating oil in the plunger flows out of the oil discharge groove into an oil guide groove formed between the bottom end of the cylindrical part and the plug screw, and then flows through the first oil duct and the second oil duct in sequence and enters the oil inlet cavity.
Preferably, the number of the oil discharge grooves is four, and the four oil discharge grooves are uniformly distributed around the bottom of the plunger.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses a set up the oil through hole on the pump body, and seted up oblique oil duct at the idler shaft that lies in oil through hole one side, the one end that oblique oil duct is close to high-pressure oil pocket and the terminal position phase-match of oil through hole, thereby be convenient for alignment between the two, still set up the end that the round is used for communicateing the oil through hole and the annular oil groove that oblique oil duct is close to the one end of high-pressure oil pocket in the idler shaft along the circumferencial direction simultaneously, thereby make insert the idler shaft downthehole back, even the end that the oil through hole is close to high-pressure oil pocket and oblique oil duct do not aim at completely, lubricating oil also can get into the inside oblique oil duct of idler shaft through annular oil groove by the oil through hole, and be different from the condition that the position that carries out the lubrication to: the optimal supply position for lubricating the idle shaft bushing by the lubricating oil in the circumferential direction is convenient to adjust and obtain. Additionally, the utility model provides a curved oil drain groove has been seted up to the pressure limiting valve in the bottom of plunger, and the valve is opened the back plunger downstream and is contacted the back with the plug screw, and lubricating oil in the plunger still can be followed
The oil flows out of the oil discharge groove into an oil guide groove formed between the bottom end of the cylindrical part and the plug screw, then flows through the first oil duct and the second oil duct in sequence and enters the oil inlet cavity, and the oil discharge groove flows out of the oil discharge groove and flows through the first oil duct on the pump body and the second oil duct on the pump cover in sequence and enters the oil inlet cavity, so that the situations of unsmooth oil discharge and valve blockage are effectively prevented, the service life of the plunger type pressure limiting valve on the oil pump is prolonged, and the oil pump plunger type pressure limiting valve has a very wide application prospect.
Drawings
Fig. 1 is an overall structure diagram of the middle gear type oil pump of the present invention.
Fig. 2 is the structure diagram of the utility model of the middle gear type oil pump after the pump cover is removed.
Fig. 3 is a sectional view of the middle gear type oil pump of the present invention.
Fig. 4 is a partially enlarged view of a portion a in fig. 3.
Fig. 5 is a sectional view of the center pillar type pressure limiting valve of the present invention.
Fig. 6 is a perspective view of the middle plunger according to the present invention.
The reference signs are:
1-pump body 2-pump cover 3-bush
4-idler shaft 5-idler gear 6-drive gear
7-driving shaft 8-driving gear 9-driven gear
10-driven shaft 11-oil inlet 12-oil outlet
13-oil through hole 14-inclined oil duct 15-annular oil groove
16-high pressure oil chamber 101-plunger 102-spring
103-screw plug 104-oil drain groove 105-first oil channel
106-the second oil passage 107-the oil intake chamber.
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", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
A gear type oil pump convenient for adjusting the lubricating position of an idler shaft bushing is disclosed, as shown in figures 1-6, and comprises a pump body 1 and a pump cover 2, wherein an idler shaft hole, an oil inlet cavity, a high-pressure oil cavity 16 and a pressure limiting valve are arranged on the pump body 1, a bushing 3 is pressed in the idler shaft hole, an idler shaft 4 is arranged in the bushing 3, an idler gear 5 is arranged on the idler shaft 4, the idler gear 5 is meshed with a transmission gear 6, the transmission gear 6 is arranged on a driving shaft 7, a driving gear 8 is arranged in the middle of the driving shaft 7, the driving gear 8 is meshed with a driven gear 9, the driven gear 9 is arranged on a driven shaft 10, the pressure limiting valve comprises a plunger 101, a spring 102 and a plug screw 103, an oil inlet 11 and an oil outlet 12 are arranged on the pump cover 2, an oil through hole 13 for communicating the high-pressure oil, an inclined oil channel 14 is arranged inside the idler shaft 4, one end of the inclined oil channel 14 is communicated with the annular oil groove 15, and the other end of the inclined oil channel corresponds to the position of the lining 3; the plunger 101 comprises a cylindrical part for mounting the spring 102, one end of the cylindrical part close to the screw plug 103 is provided with a plurality of arc-shaped oil discharge grooves 104, and the junction between the outer peripheral surface of the cylindrical part and the end surface of the cylindrical part close to the screw plug 103 is provided with a chamfer, so that a circle of circumferential oil guide grooves are formed between the bottom end of the cylindrical part and the plug screw 103 after the cylindrical part of the plunger 101 contacts the plug screw 103, the pump body 1 is provided with a first oil passage 105, the first oil passage 105 is positioned at one side of the oil discharge groove 104, the pump cover 2 is provided with a second oil passage 106, the first oil passage 105 is communicated with the second oil passage 106, the second oil passage 106 is communicated with the oil inlet cavity 107, when the plunger 101 moves downward and contacts the plug screw 103, the lubricating oil inside the plunger 101 flows out from the oil drain groove 104 into an oil guide groove formed between the bottom end of the cylindrical portion and the plug screw 103, and then flows through the first oil passage 105 and the second oil passage 106 in this order and enters the oil intake chamber 107.
The utility model is characterized in that the pump body 1 is provided with the oil through hole 13, the idler shaft 4 which is arranged at one side of the oil through hole 13 is provided with the inclined oil duct 14, one end of the inclined oil duct 14 which is close to the high-pressure oil chamber 16 is matched with the tail end position of the oil through hole 13, thereby facilitating the alignment between the two, and simultaneously, the idler shaft 4 is provided with a circle of annular oil groove 15 along the circumferential direction for communicating the tail end of the oil through hole 13 with one end of the inclined oil passage 14 close to the high-pressure oil chamber 16, so that after the idler shaft 4 is inserted into the idler shaft hole, even if the end of the oil through hole 13 is not perfectly aligned with the opening of the inclined oil gallery 14 near the end of the high-pressure oil chamber 16, the lubricating oil can enter the inclined oil gallery 14 inside the idler shaft 4 from the oil through hole 13 through the annular oil groove 15, and the condition that the position that is different from among the prior art to carrying out the lubrication to bush 3 of idler shaft 4 can't change, the utility model discloses still have a apparent advantage: which facilitates adjustment to obtain an optimum position for the lubrication of the bush 3 of the idler shaft 4 with the lubricating oil in the circumferential direction. Additionally, the utility model provides a curved oil drain groove 104 has been seted up to the pressure limiting valve in the bottom of plunger 101, and the valve is opened the back plunger downstream to with the plug screw 103 contact back, and the lubricating oil in the plunger 101 still can follow in the oil drain groove 104 and flow out to the guide oil groove that forms between the barrel portion bottom and the plug screw 103 in, then flow through in proper order first oil duct 105, the second oil duct 106 back and get into oil inlet chamber 107, oil drain groove 104 flows out and flow through in proper order and get into oil inlet chamber 107 behind first oil duct 105 on the pump body 1, the second oil duct 106 on the pump cover 2, has effectively prevented that the oil extraction is not smooth and easy, the dead condition of valve is suppressed takes place, has prolonged the life of plunger type pressure limiting valve on the oil pump.
As a preferred embodiment of the present invention, the number of the oil drainage grooves 104 is four, and the four oil drainage grooves 104 are uniformly distributed around the bottom of the plunger 101.
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 (2)
1. A gear type oil pump convenient for adjusting the lubricating position of an idler shaft bushing comprises a pump body (1) and a pump cover (2), wherein an idler shaft hole, an oil inlet cavity (107), a high-pressure oil cavity (16) and a pressure limiting valve are arranged on the pump body (1), a bushing (3) is arranged in the idler shaft hole in a pressing mode, an idler shaft (4) is arranged inside the bushing (3), an idler gear (5) is arranged on the idler shaft (4), the idler gear (5) is meshed with a transmission gear (6), the transmission gear (6) is arranged on a driving shaft (7), a driving gear (8) is arranged in the middle of the driving shaft (7), the driving gear (8) is meshed with a driven gear (9), the driven gear (9) is arranged on a driven shaft (10), the pressure limiting valve comprises a plunger (101), a spring (102) and a screw plug (103), an oil inlet (11) and an oil outlet (12) are arranged on the pump cover (, the method is characterized in that: an oil through hole (13) used for communicating a high-pressure oil chamber (16) with an idler shaft hole is formed in the pump body (1), an annular oil groove (15) is formed in the outer peripheral surface of the idler shaft (4), an inclined oil duct (14) is arranged inside the idler shaft (4), one end of the inclined oil duct (14) is communicated with the annular oil groove (15), and the other end of the inclined oil duct corresponds to the position of the lining (3); the plunger (101) comprises a cylindrical part for mounting a spring (102), one end of the cylindrical part close to a plug screw (103) is provided with a plurality of arc-shaped oil discharge grooves (104), a chamfer is arranged at the joint between the outer circumferential surface of the cylindrical part and the end surface of the cylindrical part close to the plug screw (103), so that a circle of circumferential oil guide grooves are formed between the bottom end of the cylindrical part and the plug screw (103) after the cylindrical part of the plunger (101) is contacted with the plug screw (103), the pump body (1) is provided with a first oil channel (105), the first oil channel (105) is positioned on one side of the oil discharge grooves (104), the pump cover (2) is provided with a second oil channel (106), the first oil channel (105) is communicated with the second oil channel (106), the second oil channel (106) is communicated with the oil inlet cavity (107), and after the plunger (101) moves downwards and is contacted with the plug screw (103), lubricating oil in the plunger (101) flows out of the oil discharge groove (104) to an oil guide groove formed between the bottom end of the cylindrical portion and the plug screw (103), and then flows into the oil inlet cavity (107) after sequentially flowing through the first oil passage (105) and the second oil passage (106).
2. The gear-type oil pump according to claim 1, characterized in that: the number of the oil discharge grooves (104) is four, and the four oil discharge grooves (104) are uniformly distributed on the periphery of the bottom of the plunger (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920458494.6U CN209782193U (en) | 2019-04-08 | 2019-04-08 | Gear type oil pump convenient for adjusting lubricating position of idler shaft bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920458494.6U CN209782193U (en) | 2019-04-08 | 2019-04-08 | Gear type oil pump convenient for adjusting lubricating position of idler shaft bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209782193U true CN209782193U (en) | 2019-12-13 |
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ID=68801694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920458494.6U Active CN209782193U (en) | 2019-04-08 | 2019-04-08 | Gear type oil pump convenient for adjusting lubricating position of idler shaft bushing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209782193U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882729A (en) * | 2019-04-08 | 2019-06-14 | 湖南机油泵股份有限公司 | A kind of gear type oil pump for the lubricating place being conveniently adjusted idle pulley neck bush |
-
2019
- 2019-04-08 CN CN201920458494.6U patent/CN209782193U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882729A (en) * | 2019-04-08 | 2019-06-14 | 湖南机油泵股份有限公司 | A kind of gear type oil pump for the lubricating place being conveniently adjusted idle pulley neck bush |
| CN109882729B (en) * | 2019-04-08 | 2023-09-19 | 湖南机油泵股份有限公司 | Gear type oil pump convenient for adjusting lubrication position of idler shaft bushing |
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