CN209909522U - Shaft end lubricating oil pump - Google Patents
Shaft end lubricating oil pump Download PDFInfo
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- CN209909522U CN209909522U CN201920622394.2U CN201920622394U CN209909522U CN 209909522 U CN209909522 U CN 209909522U CN 201920622394 U CN201920622394 U CN 201920622394U CN 209909522 U CN209909522 U CN 209909522U
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Abstract
The utility model relates to an inner gearing cycloid gear pump technical field, concretely relates to shaft end lubricating oil pump, which comprises a pump body and a pump cover, wherein the pump body is provided with a rotatable hypocycloid rotor, an epicycloid rotor and a rotor shaft connected with the hypocycloid rotor, the pump cavity, the epicycloid rotor and the rotor shaft are coaxial, the pump body is also provided with a eccentric core sleeve sleeved outside the hypocycloid rotor, the edge of the pump cavity is provided with a positioning pin parallel to the axis of the pump cavity, and the eccentric core sleeve can swing around the positioning pin; the pump body is also provided with an oil inlet channel and an oil discharge channel which penetrate through the pump body, and a liquid inlet cavity and a liquid discharge cavity which are respectively communicated with the oil inlet channel and the oil discharge channel, and the liquid inlet cavity and the liquid discharge cavity are both communicated with the gear chamber; the oil pump has the advantages of simple and compact structure, small size, small mass, stable operation, low noise, long service life, good rotating speed characteristic and no cavity phenomenon, and can normally supply oil for the forward and reverse rotation of the hypocycloid rotor under the condition of not changing the liquid inlet and the liquid outlet.
Description
Technical Field
The utility model relates to an inner gearing cycloid gear pump technical field, concretely relates to axle head lubricating-oil pump.
Background
An internally engaged cycloidal gear pump is composed of oil distributing disk, pump body, eccentrically installed external rotor (driven wheel) and internal rotor (driving wheel). The inner rotor and the outer rotor have one tooth difference, and a plurality of sealed volumes are formed because the inner rotor and the outer rotor are meshed by a plurality of teeth.
When the existing inner meshing cycloid gear pump rotates forwards, the liquid inlet cavity sucks oil and discharges the oil through the liquid discharge cavity, and when the existing inner meshing cycloid gear pump rotates backwards, the oil discharge end sucks the oil and discharges the oil through the oil suction end;
the internal meshing cycloid gear pump can play a lubricating role in the process of positive and negative rotation in partial fields, and oil is sucked in through the oil suction end and discharged through the oil discharge end no matter the internal meshing cycloid gear pump rotates positively or reversely, so that the internal meshing cycloid gear pump is not available at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a shaft end lubricating oil pump, this oil pump simple structure, compactness, small in size, quality are little, operate steadily, the noise is little, longe-lived, rotational speed characteristic is good, do not have the cavitation, under the condition that does not change inlet and leakage fluid dram, the equal normal oil supply of hypocycloid rotor positive and negative rotation.
To achieve the purpose, the utility model adopts the following technical proposal:
the lubricating oil pump comprises a pump body and a pump cover, wherein one side of the pump body is provided with an inwards-recessed pump cavity, the pump cover covers the pump cavity and is fixedly connected with the pump body, a rotatable hypocycloid rotor, an epicycloid rotor and a rotor shaft connected with the hypocycloid rotor and the epicycloid rotor are mounted on the pump body, and the pump cavity, the epicycloid rotor and the rotor shaft are coaxial;
the hypocycloid rotor is sleeved on the outer side of the epicycloid rotor and is in meshed transmission with the epicycloid rotor, a plurality of inner teeth are arranged on the hypocycloid rotor, a plurality of outer teeth are arranged on the epicycloid rotor, the number of the inner teeth is at least one less than that of the outer teeth, the inner teeth are meshed with the outer teeth, and a gear chamber is formed between the inner teeth and the outer teeth;
the pump body is also provided with a core shift sleeve sleeved outside the hypocycloid rotor, the core shift sleeve is in a circular ring shape, the core shift sleeve is arranged inside the pump cavity, and the eccentric amount of the core shift sleeve relative to the pump cavity is smaller than the difference between the radius of the inner wall of the pump cavity and the radius of the outer wall of the core shift sleeve;
the edge of the pump cavity is provided with a positioning pin parallel to the axis of the pump cavity, and the eccentric sleeve can swing around the positioning pin;
the pump body still is provided with the oil feed passageway, the oil extraction passageway that run through the pump body and feed liquor chamber and the flowing back chamber that communicate respectively thereof, and feed liquor chamber and flowing back chamber all communicate with the gear room, and the locating pin was kept away from in the gear room to the feed liquor chamber setting, and the flowing back chamber setting is in the gear room one side of being close to the locating pin, and feed liquor chamber and flowing back chamber are for the axis of pump chamber and the plane symmetry's that the axis of locating pin constitutes shape.
As a preferred embodiment of a shaft-end lubricant pump, the number of internal teeth is one less than the number of external teeth.
As a preferred scheme of the shaft-end lubricating oil pump, the liquid inlet cavity comprises a liquid inlet groove and a liquid inlet hole, the liquid outlet cavity comprises a liquid outlet groove and a liquid outlet hole, the liquid inlet groove and the liquid outlet groove are both grooves vertically extending downwards from the bottom wall of the pump cavity, the liquid inlet hole is communicated with the inside of the liquid inlet groove and the outside of the pump body, and the liquid outlet hole is communicated with the inside of the liquid outlet groove and the outside of the pump body;
the liquid inlet groove and the liquid discharge groove are symmetrically distributed around the axis of the pump cavity, and the liquid inlet groove and the liquid discharge groove are in crescent shapes which are symmetrical relative to the plane formed by the axis of the pump cavity and the axis of the positioning pin.
As a preferred scheme of a shaft end lubricating oil pump, a pump cavity hole penetrating through the pump body along the axis of the pump cavity is formed in the pump body, a rotor shaft is rotatably installed in the pump cavity hole, two ends of the rotor shaft are respectively located in the pump cavity and the pump body, and one end, located in the pump cavity, of the rotor shaft is fixedly connected with an epicycloidal rotor.
As a preferred scheme of a shaft end lubricating oil pump, the pump cavity is provided with an end surface lubricating groove which is sunken downwards and communicated with the liquid feeding groove and the pump cavity hole.
As an optimal scheme of the shaft end lubricating oil pump, a rotor shaft lubricating groove which is recessed downwards around a pump cavity hole is further formed in the pump cavity, and the rotor shaft lubricating groove is communicated with the end face lubricating groove.
As an optimal scheme of a shaft end lubricating oil pump, the rotor shaft is cylindrical including axis body and actuating lever, and the both ends of axis body are located the inside of pump chamber and the inside of the pump body respectively, and the axis body is rotatable to be installed in the pump chamber hole, and the actuating lever is along the axis of axis body towards the milling that keeps away from the direction extension of pump chamber to the limit piece.
The utility model has the advantages that:
when the rotor shaft drives the epicycloidal rotor to rotate clockwise, the hypocycloidal rotor rotates in the same direction with the epicycloidal rotor under the drive of the epicycloidal rotor, the eccentric sleeve also rotates in the same direction, the eccentric sleeve rotates clockwise by a certain angle around the positioning pin and then abuts against the inner wall of the pump cavity so as to be fixed, at the moment, the pump body, the pump cover, the inner teeth and the outer teeth form two closed working volumes, the inner teeth and the outer teeth close to the liquid inlet cavity are gradually disengaged, the first closed working volume is gradually increased to form local vacuum, so that oil is sucked in through the liquid inlet cavity, gaps between the inner teeth and the outer teeth are filled with the oil, the inner teeth and the outer teeth close to the liquid discharge cavity are gradually engaged, the second closed working volume is gradually reduced, and the oil is extruded, so that the oil is discharged;
when the rotor shaft drives the epicycloidal rotor to rotate anticlockwise, the hypocycloidal rotor rotates in the same direction with the epicycloidal rotor under the drive of the epicycloidal rotor, the eccentric sleeve also rotates in the same direction, the eccentric sleeve rotates anticlockwise for a certain angle around the positioning pin and abuts against the inner wall of the pump cavity to be fixed, at the moment, the pump body, the pump cover, the inner teeth and the outer teeth form two different closed working volumes, the inner teeth and the outer teeth close to the liquid inlet cavity are gradually disengaged, the third closed working volume is gradually increased to form local vacuum, so that oil is sucked in through the liquid inlet cavity, the oil fills the gap between the inner teeth and the outer teeth, the inner teeth and the outer teeth close to the liquid discharge cavity are gradually engaged, the fourth closed working volume is gradually reduced, the oil is extruded, and the oil is discharged through the liquid discharge cavity;
no matter the epicycloidal rotor rotates clockwise or anticlockwise, oil is sucked in quantitatively through the liquid inlet cavity and is discharged through the liquid discharge cavity, and the lubricating oil is suitable for being popularized and applied to various devices or systems which need to be capable of lubricating in forward and reverse rotation.
1. The oil pump has the advantages of simple and compact structure, small size and small mass, and an isolation element is not required to be arranged between the liquid inlet cavity and the liquid outlet cavity, so that the number of parts is small;
2. the internal teeth and the external teeth are meshed in an inner way and rotate in the same direction, the relative sliding speed at the position of the tooth guo is low, and the friction and the abrasion between tooth surfaces are low, so that the oil pump is stable in operation, low in noise and long in service life;
3. the oil pump has good rotating speed characteristic, high volume efficiency and sufficient oil absorption and oil discharge, and the centrifugal force of the liquid generated by the high-speed rotation of the rotor can enable the oil to fill gaps between the teeth, so that the phenomenon of cavitation is avoided, and the oil pump can be used for high-speed operation;
4. under the condition of not changing the liquid inlet cavity and the liquid outlet cavity, the epicycloid rotor can normally supply oil in both positive and negative rotation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a left side view of a shaft end lubricating oil pump according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
fig. 3 is a perspective view of a shaft end lubricating oil pump according to an embodiment of the present invention;
fig. 4 is an exploded perspective view of a shaft end lubrication pump according to an embodiment of the present invention;
fig. 5 is a first top view of the internal structure of a shaft end lubricating oil pump according to an embodiment of the present invention;
fig. 6 is a second top view of the internal structure of the shaft-end lubricating oil pump according to the embodiment of the present invention;
fig. 7 is a top view of a pump body of a shaft-end lubrication pump according to an embodiment of the present invention;
fig. 8 is a perspective view of a pump body of a shaft end lubricating oil pump according to an embodiment of the present invention;
in the figure:
1. a pump body;
1a, a pump cavity; 1a1, pump chamber hole;
1b, positioning pins;
1c, a liquid inlet cavity; 1c1, a liquid inlet tank; 1c2, a liquid inlet hole; 1c3, end face lubrication groove; 1c4, rotor shaft lubrication groove;
1d, a liquid discharge cavity; 1d1, drain tank; 1d2, drain hole;
2. a pump cover;
3. a hypocycloidal rotor; 3a, internal teeth;
4. an epicycloidal rotor; 4a, external teeth;
5. a rotor shaft; 5a, a shaft body; 5b, a driving rod;
6. core deviation sleeve;
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.
In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 8, the shaft end lubricating oil pump comprises a pump body 1 and a pump cover 2, wherein one side of the pump body 1 is provided with an inward-recessed pump cavity 1a, the pump cover 2 covers the pump cavity 1a and is fixedly connected with the pump body 1, the pump body 1 is provided with a rotatable hypocycloid rotor 3, an epicycloid rotor 4 and a rotor shaft 5 connected with the hypocycloid rotor 4, and the pump cavity 1a, the epicycloid rotor 4 and the rotor shaft 5 are coaxial;
the hypocycloid rotor 3 is sleeved on the outer side of the epicycloid rotor 4, the hypocycloid rotor 3 and the epicycloid rotor 4 are in meshing transmission, a plurality of inner teeth 3a are arranged on the hypocycloid rotor 3, a plurality of outer teeth 4a are arranged on the epicycloid rotor 4, the number of the inner teeth 3a is at least one less than that of the outer teeth 4a, the inner teeth 3a are meshed with the outer teeth 4a, and a gear chamber is formed between the inner teeth 3a and the outer teeth 4 a;
the pump body 1 is also provided with a core shift sleeve 6 sleeved outside the hypocycloid rotor 3, the core shift sleeve 6 is in a circular ring shape, the core shift sleeve 6 is installed inside the pump cavity 1a, and the eccentricity of the core shift sleeve 6 relative to the pump cavity 1a is smaller than the difference between the radius of the inner wall of the pump cavity 1a and the radius of the outer wall of the core shift sleeve 6;
the edge of the pump cavity 1a is provided with a positioning pin 1b parallel to the axis of the pump cavity 1a, and the eccentric sleeve 6 can swing around the positioning pin 1 b;
the pump body 1 still is provided with the oil feed passageway that runs through the pump body, oil extraction passageway and feed liquor chamber 1c and the leakage fluid chamber 1d that communicates respectively thereof, feed liquor chamber 1c and leakage fluid chamber 1d all communicate with the gear room, feed liquor chamber 1c sets up the one side of keeping away from locating pin 1b in the gear room, leakage fluid chamber 1d sets up the one side that is close to locating pin 1b in the gear room, feed liquor chamber 1c and leakage fluid chamber 1d are the plane symmetry's shape that constitutes for the axis of pump chamber 1a and the axis of locating pin 1 b.
The pump body 1 and the pump cover 2 are combined through a pump cavity 1a to form a rotor assembly chamber, the eccentric sleeve 6 is rotatably installed inside the pump cavity 1a through a positioning pin 1b, so that the pump body 1, the pump cover 2 and the eccentric sleeve 6 are combined to form a rotor working chamber, the hypocycloid rotor 3 and the epicycloid rotor 4 operate in the rotor working chamber, and the rotor working chamber can eccentrically move relative to the rotor assembly chamber.
The number of the inner teeth 3a is one less than the number of the outer teeth 4 a.
The hypocycloid rotors 3 and the epicycloid rotors 4 are internally meshed and rotate in the same direction, and under the condition that only one tooth is different between the inner teeth 3a and the outer teeth 4a, the relative sliding speed at the tooth profiles of the hypocycloid rotors 3 and the epicycloid rotors 4 is small, and the friction and the abrasion of the tooth surfaces are small.
The liquid inlet cavity 1c comprises a liquid inlet groove 1c1 and a liquid inlet hole 1c2, the liquid outlet cavity 1d comprises a liquid outlet groove 1d1 and a liquid outlet hole 1d2, the liquid inlet groove 1c1 and the liquid outlet groove 1d1 are both grooves vertically extending downwards from the bottom wall of the pump cavity 1a, the liquid inlet hole 1c2 is communicated with the inside of the liquid inlet groove 1c1 and the outside of the pump body 1, and the liquid outlet hole 1d2 is communicated with the inside of the liquid outlet groove 1d1 and the outside of the pump body 1;
the liquid inlet groove 1c1 and the liquid discharge groove 1d1 are symmetrically distributed around the axis of the pump cavity 1a, and the liquid inlet groove 1c1 and the liquid discharge groove 1d1 are both crescent shapes which are symmetrical relative to the plane formed by the axis of the pump cavity 1a and the axis of the positioning pin 1 b.
As shown in fig. 7 and 8, the oil liquid is sucked into the gear chamber through the liquid inlet hole 1c2 and the liquid inlet groove 1c1 in sequence, and simultaneously the oil liquid is discharged from the gear chamber through the liquid discharge groove 1d1 and the liquid discharge hole 1d2 in sequence; the liquid inlet groove 1c1 and the liquid outlet groove 1d1 increase the contact area of the liquid inlet chamber 1c and the liquid outlet chamber 1d with the gear chamber, so that the liquid inlet chamber 1c and the liquid outlet chamber 1d are communicated with the gear chamber no matter when the rotor working chamber rotates clockwise to one side of the pump chamber 1a around the positioning pin 1b or when the rotor working chamber rotates anticlockwise to the other side of the pump chamber 1a around the positioning pin 1 b.
The pump body 1 is provided with a pump cavity hole 1a1 penetrating through the pump body 1 along the axis of the pump cavity 1a, the rotor shaft 5 is rotatably installed in the pump cavity hole 1a1, two ends of the rotor shaft 5 are respectively positioned in the pump cavity 1a and the pump body 1, and one end of the rotor shaft 5 positioned in the pump cavity 1a is fixedly connected with the epicycloid rotor 4.
The end of the rotor shaft 5 located inside the pump body 1 is driven to rotate by external equipment, so that the end of the rotor shaft 5 located inside the pump cavity 1a drives the epicycloidal rotor 4 to rotate.
The pump chamber 1a is provided with a face lubricating groove 1c3 recessed downward and communicating the liquid feed groove 1c1 and the pump chamber hole 1a 1.
When the liquid inlet chamber 1c sucks oil, part of the oil enters the end face lubricating groove 1c3 through the rotor shaft lubricating groove 1c4, and the end face lubricating groove 1c3 provides lubricating oil for the lower end face of the epicycloidal rotor 4.
The pump cavity 1a is also provided with a rotor shaft lubricating groove 1c4 which is recessed downwards around the pump cavity hole 1a1, and the rotor shaft lubricating groove 1c4 is communicated with the end face lubricating groove 1c 3.
The rotor shaft lubrication groove 1c4 is fed with oil through the end face lubrication groove 1c3, thereby supplying the cylindrical surface of the rotor shaft 5 with lubrication oil.
The rotor shaft 5 comprises a shaft body 5a and a driving rod 5b, the shaft body 5a is cylindrical, two ends of the shaft body 5a are respectively located inside the pump cavity 1a and inside the pump body 1, the shaft body 5a is rotatably installed in the pump cavity hole 1a1, and the driving rod 5b is a milling edge block extending along the axis of the shaft body 5a towards the direction far away from the pump cavity 1 a.
The drive lever 5b facilitates the rotation of the external device drive shaft body 5 a.
The utility model discloses a theory of operation:
as shown in fig. 5, when the trochoid rotor 4 is driven by the rotor shaft 5 to rotate clockwise by the trochoid rotor 4, the hypocycloid rotor 3 rotates in the same direction as the trochoid rotor 4 under the driving of the trochoid rotor 4, the eccentric sleeve 6 also rotates in the same direction, the eccentric sleeve 6 rotates clockwise by a certain angle around the positioning pin 1b and then abuts against the inner wall of the pump cavity 1a so as to be fixed, at the moment, the pump body 1, the pump cover 2, the internal teeth 3a and the external teeth 4a are combined to form two closed working volumes, the internal teeth 3a and the external teeth 4a close to the liquid inlet cavity 1c are gradually disengaged, the first closed working volume is gradually increased to form partial vacuum, so that oil is sucked through the liquid inlet cavity 1c, the oil fills the gap between the internal teeth 3a and the external teeth 4a, the internal teeth 3a and the external teeth 4a close to the liquid outlet cavity 1d are gradually engaged, the second closed working, thereby discharging the oil through the liquid discharge chamber 1 d;
as shown in fig. 6, when the rotor shaft 5 drives the epicycloidal rotor 4 to rotate counterclockwise, the hypocycloidal rotor 3 rotates in the same direction as the epicycloidal rotor 4 under the driving of the epicycloidal rotor 4, the eccentric sleeve 6 also rotates in the same direction, the eccentric sleeve 6 rotates counterclockwise by a certain angle around the positioning pin 1b and abuts against the inner wall of the pump cavity 1a so as to be fixed, at this time, the pump body 1, the pump cover 2, the internal teeth 3a and the external teeth 4a are combined to form two different closed working volumes, the internal teeth 3a and the external teeth 4a close to the liquid inlet cavity 1c are gradually disengaged, the third closed working volume is gradually increased to form partial vacuum, so that the liquid is sucked through the liquid inlet cavity 1c, the oil fills the gap between the internal teeth 3a and the external teeth 4a, the internal teeth 3a and the external teeth 4a close to the liquid discharge cavity 1d are gradually engaged, and the fourth closed working volume is, the oil is squeezed, thereby discharging the oil through the liquid discharge chamber 1 d;
no matter the epicycloidal rotor 4 rotates clockwise or anticlockwise, oil is sucked in quantitatively through the liquid inlet cavity 1c and discharged through the liquid discharge cavity 1d, and the lubricating oil is suitable for being popularized and applied to various devices or systems which need to be capable of lubricating in forward and reverse rotation.
It should be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention and the technical principles thereof. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, these modifications are within the scope of the present invention as long as they do not depart from the spirit of the present invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.
Claims (7)
1. A shaft end lubricating oil pump is characterized by comprising a pump body (1) and a pump cover (2), wherein one side of the pump body (1) is provided with an inwards concave pump cavity (1a), the pump cover (2) covers the pump cavity (1a) and is fixedly connected with the pump body (1), the pump body (1) is provided with a rotatable hypocycloid rotor (3), an epicycloid rotor (4) and a rotor shaft (5) connected with the hypocycloid rotor (4), and the pump cavity (1a), the epicycloid rotor (4) and the rotor shaft (5) are coaxial;
the hypocycloid rotor (3) is sleeved on the outer side of the epicycloid rotor (4) and is in meshed transmission with the hypocycloid rotor (3) and the epicycloid rotor (4), a plurality of inner teeth (3a) are arranged on the hypocycloid rotor (3), a plurality of outer teeth (4a) are arranged on the epicycloid rotor (4), the number of the inner teeth (3a) is at least one less than that of the outer teeth (4a), the inner teeth (3a) are meshed with the outer teeth (4a), and a gear chamber is formed between the inner teeth (3a) and the outer teeth (4 a);
the pump body (1) is also provided with a core shift sleeve (6) sleeved outside the hypocycloid rotor (3), the core shift sleeve (6) is in a circular ring shape, the core shift sleeve (6) is installed inside the pump cavity (1a), and the eccentricity of the core shift sleeve (6) relative to the pump cavity (1a) is smaller than the difference between the radius of the inner wall of the pump cavity (1a) and the radius of the outer wall of the core shift sleeve (6);
the edge of the pump cavity (1a) is provided with a positioning pin (1b) parallel to the axis of the pump cavity (1a), and the eccentric sleeve (6) can swing around the positioning pin (1 b);
the pump body (1) still is provided with the oil feed passageway that runs through the pump body, oil extraction passageway and feed liquor chamber (1c) and flowing back chamber (1d) that communicate respectively thereof, feed liquor chamber (1c) and flowing back chamber (1d) all communicate with the gear room, feed liquor chamber (1c) set up the one side of keeping away from locating pin (1b) in the gear room, flowing back chamber (1d) set up the one side that is close to locating pin (1b) in the gear room, feed liquor chamber (1c) and flowing back chamber (1d) are the plane symmetry's shape that constitutes for the axis of pump chamber (1a) and the axis of locating pin (1 b).
2. A shaft end lubricating oil pump according to claim 1, characterised in that the number of internal teeth (3a) is one less than the number of external teeth (4 a).
3. The shaft-end lubricating oil pump as defined in claim 1, wherein the liquid inlet chamber (1c) comprises a liquid inlet groove (1c1) and a liquid inlet hole (1c2), the liquid outlet chamber (1d) comprises a liquid outlet groove (1d1) and a liquid outlet hole (1d2), the liquid inlet groove (1c1) and the liquid outlet groove (1d1) are both grooves extending vertically and downwardly from the bottom wall of the pump cavity (1a), the liquid inlet hole (1c2) communicates the interior of the liquid inlet groove (1c1) and the exterior of the pump body (1), and the liquid outlet hole (1d2) communicates the interior of the liquid outlet groove (1d1) and the exterior of the pump body (1);
the liquid inlet groove (1c1) and the liquid outlet groove (1d1) are symmetrically distributed around the axis of the pump cavity (1a), and the liquid inlet groove (1c1) and the liquid outlet groove (1d1) are both in crescent shapes which are symmetrical relative to a plane formed by the axis of the pump cavity (1a) and the axis of the positioning pin (1 b).
4. A shaft end lubricating oil pump in accordance with claim 3, characterized in that the pump body (1) is provided with a pump chamber hole (1a1) through the pump body (1) along the axis of the pump chamber (1a), the rotor shaft (5) is rotatably mounted in the pump chamber hole (1a1), the two ends of the rotor shaft (5) are respectively located inside the pump chamber (1a) and inside the pump body (1), and the end of the rotor shaft (5) located inside the pump chamber (1a) is fixedly connected with the epicycloidal rotor (4).
5. The shaft-end lubricating oil pump as claimed in claim 4, wherein the pump chamber (1a) is provided with a face lubricating groove (1c3) recessed downward and communicating the liquid feed groove (1c1) and the pump chamber hole (1a 1).
6. The shaft end lubricating oil pump as claimed in claim 5, wherein the pump cavity (1a) is further provided with a rotor shaft lubricating groove (1c4) which is recessed downwards around the pump cavity hole (1a1), and the rotor shaft lubricating groove (1c4) is communicated with the end face lubricating groove (1c 3).
7. A shaft end lubricating oil pump according to claim 4, characterized in that the rotor shaft (5) comprises a shaft body (5a) and a driving rod (5b), the shaft body (5a) is cylindrical, the two ends of the shaft body (5a) are respectively located inside the pump cavity (1a) and inside the pump body (1), the shaft body (5a) is rotatably mounted in the pump cavity hole (1a1), and the driving rod (5b) is a milling edge block extending along the axis of the shaft body (5a) in the direction away from the pump cavity (1 a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920622394.2U CN209909522U (en) | 2019-04-30 | 2019-04-30 | Shaft end lubricating oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920622394.2U CN209909522U (en) | 2019-04-30 | 2019-04-30 | Shaft end lubricating oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209909522U true CN209909522U (en) | 2020-01-07 |
Family
ID=69046820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920622394.2U Active CN209909522U (en) | 2019-04-30 | 2019-04-30 | Shaft end lubricating oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209909522U (en) |
-
2019
- 2019-04-30 CN CN201920622394.2U patent/CN209909522U/en active Active
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