CN222102206U - Single cylinder engine oil pump - Google Patents
Single cylinder engine oil pump Download PDFInfo
- Publication number
- CN222102206U CN222102206U CN202420515165.1U CN202420515165U CN222102206U CN 222102206 U CN222102206 U CN 222102206U CN 202420515165 U CN202420515165 U CN 202420515165U CN 222102206 U CN222102206 U CN 222102206U
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- Prior art keywords
- oil
- gear
- pump
- cylinder engine
- oil pumping
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- 239000010705 motor oil Substances 0.000 title claims description 27
- 239000003921 oil Substances 0.000 claims abstract description 206
- 238000005086 pumping Methods 0.000 claims abstract description 83
- 230000000903 blocking effect Effects 0.000 claims description 13
- 239000010727 cylinder oil Substances 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 1
Landscapes
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
本实用新型涉及机油泵技术领域，具体提供了一种单缸机机油泵，设置于发动机的后箱总成上，所述后箱总成内设置有凸轮轴齿轮，所述单缸机机油泵包括泵油腔和泵油齿轮，所述后箱总成内靠近所述凸轮轴齿轮的位置处设置有所述泵油腔，所述泵油腔朝向所述凸轮轴齿轮的一侧设置有连接口，所述泵油齿轮用于转动安装于所述泵油腔内，且所述泵油齿轮的一侧通过所述连接口以与所述凸轮轴齿轮相啮合；其中，连接口用于使得泵油齿轮与凸轮轴齿轮相啮合，以便于借助凸轮轴齿轮转动带动泵油齿轮在泵油腔内转动，实现泵油，机油泵内只设置一个泵油齿轮，不仅有利于降低成本，而且也有利于缩小机油泵的泵油腔的空间，进而缩小机油泵整体布置空间。
The utility model relates to the technical field of oil pumps, and specifically provides a single-cylinder oil pump, which is arranged on a rear box assembly of an engine, a camshaft gear is arranged in the rear box assembly, and the single-cylinder oil pump comprises an oil pumping chamber and an oil pumping gear, the oil pumping chamber is arranged at a position close to the camshaft gear in the rear box assembly, a connecting port is arranged on the side of the oil pumping chamber facing the camshaft gear, the oil pumping gear is used to be rotatably installed in the oil pumping chamber, and one side of the oil pumping gear is meshed with the camshaft gear through the connecting port; wherein the connecting port is used to make the oil pumping gear mesh with the camshaft gear, so that the oil pumping gear can be driven to rotate in the oil pumping chamber by the rotation of the camshaft gear to achieve oil pumping. Only one oil pumping gear is arranged in the oil pump, which is not only conducive to reducing costs, but also conducive to reducing the space of the oil pumping chamber of the oil pump, thereby reducing the overall layout space of the oil pump.
Description
Technical Field
The utility model relates to the technical field of oil pumps, in particular to an oil pump of a single-cylinder engine.
Background
The single cylinder diesel engine, that is, the diesel engine with only one cylinder when classified according to the number of cylinders, is mainly applied to the fields of agricultural machinery, engineering machinery, automobile industry, ship machinery, electric power industry and the like. The oil pump is an important component of the vehicle engine, and is used for pumping the engine oil in the oil pan into the engine after being pressurized so as to lubricate all main moving parts of the engine.
The existing single-cylinder engine oil pump is mostly integrated and driven by an external gear, a belt or a shaft, the inside of the existing single-cylinder engine oil pump is provided with two gears for pumping oil, the gears are sealed in an oil pumping cavity by an upper shell and a lower shell, the arrangement of the two oil pumping gears results in large overall arrangement space of the oil pump, the requirement of compact arrangement of the single-cylinder engine is not facilitated, and the generation cost can be increased.
Disclosure of utility model
The technical problem to be solved by the utility model is that the internal arrangement of the oil pump of the existing single-cylinder engine is used for pumping oil by virtue of two gears, so that the whole arrangement space of the oil pump is large, and the requirement of compact arrangement of the single-cylinder engine is not facilitated.
In order to solve the problems, the utility model provides the following technical scheme:
The utility model provides a single cylinder engine oil pump, sets up on the back case assembly of engine, be provided with camshaft gear in the back case assembly, single cylinder engine oil pump includes pump oil pocket and pump oil gear, the pump oil pocket set up in be close to in the back case assembly camshaft gear's the position department, pump oil pocket orientation one side of camshaft gear is provided with the connector, pump oil gear be used for rotating install in the pump oil pocket, just one side of pump oil gear is passed through the connector with camshaft gear meshes mutually.
Compared with the prior art, the oil pump of the single-cylinder engine has the following beneficial effects:
When the cam gear rotates to drive a valve mechanism of the engine to work, as one side of the oil pumping cavity facing the cam shaft is provided with a connecting port, one side of the oil pumping gear is meshed with the cam gear through the connecting port, so that the cam gear drives the oil pumping gear to rotate to pump oil in the oil pumping cavity, wherein the connecting port is used for enabling the oil pumping gear to be meshed with the cam gear so as to drive the oil pumping gear to rotate in the oil pumping cavity by means of rotation of the cam gear, and oil pumping is realized, that is, only one oil pumping gear is arranged in the oil pump, so that cost is reduced, the space of the oil pumping cavity of the oil pump is reduced, the whole arrangement space of the oil pump is further reduced, and the requirement of compact arrangement of a single-cylinder engine is met.
The oil pumping cavity comprises a mounting groove and a cover plate, wherein the mounting groove is provided with the connecting port towards one side wall of the cam shaft gear, one axial end of the mounting groove is provided with a mounting port, the oil pumping gear is used for being mounted into the mounting groove through the mounting port, and the cover plate is detachably mounted at the mounting port and used for covering the mounting port.
Preferably, the mounting port is communicated with the connection port, the cover plate is used for covering the connection port and the connection port, so as to cover the position where the cam shaft gear is meshed with the oil pumping gear, and the cover plate is in clearance fit with the cam shaft gear.
Preferably, the oil pump of the single-cylinder engine further comprises a flyweight seat and a pin shaft, the oil pumping gear is fixedly connected with the flyweight seat, the pin shaft is fixed in the mounting groove, and the flyweight seat is rotatably mounted on the pin shaft.
Preferably, the single-cylinder engine oil pump further comprises a pressure relief structure, the pressure relief structure comprises an oil drain hole and an oil blocking plug, the side wall of the oil pumping cavity is provided with the oil drain hole in a penetrating mode, and the oil blocking plug is used for blocking the oil drain hole from the outside of the oil pumping cavity.
Preferably, the oil drain hole is arranged on the cover plate.
Preferably, the pressure relief structure further includes an elastic member for connecting between an outer wall of the pump oil chamber and the oil stopper, the elastic member maintaining the oil stopper with a tendency to block the oil drain hole.
Preferably, the pressure relief structure further comprises a limiting piece, wherein the limiting piece is used for being installed on the outer wall of the oil pumping cavity and close to the oil drain hole, and the limiting piece and the oil blocking plug blocked at the oil drain hole are arranged at a distance along the axial direction of the oil drain hole.
Preferably, a low-pressure oil cavity and a high-pressure oil cavity are further arranged in the rear box assembly, the low-pressure oil cavity is communicated with the connecting port through a first oil duct, and the high-pressure oil cavity is communicated with the connecting port through a second oil duct.
Preferably, a crank gear is further arranged in the rear box assembly, the crank gear is used for being meshed with the cam gear to drive the cam gear, and the number of teeth of the cam gear is twice that of teeth of the crank gear.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a single-cylinder engine oil pump according to an embodiment of the present utility model;
Fig. 2 is a schematic diagram of the overall structure of a single-cylinder engine oil pump according to an embodiment of the present utility model;
Fig. 3 is a schematic diagram of the whole structure of a single-cylinder engine oil pump according to an embodiment of the present utility model;
Fig. 4 is a schematic diagram of a cross-sectional structure of an oil pumping gear and a flyweight seat of an oil pump of a single-cylinder engine according to an embodiment of the present utility model.
Reference numerals illustrate:
1 pump oil cavity, 10 connector, 11 mounting groove, 12 apron, 13 installing ports, 2 pump oil gear, 3 flyweight seat, 4 round pin axle, 5 pressure release structure, 51 spacing piece, 52 keep off the oil plug, 53 elastic component, 6 rear box assembly, 61 low pressure oil cavity, 62 high pressure oil cavity, 63 first oil duct, 64 second oil duct, 7 camshaft gear, 8 crankshaft gear.
Detailed Description
Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the application but are not intended to limit the scope of the application.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
It should be noted that in the coordinate system XYZ provided herein, the X-axis forward direction represents the right direction, the X-axis reverse direction represents the left direction, the Y-axis forward direction represents the front direction, the Y-axis reverse direction represents the rear direction, the Z-axis forward direction represents the top direction, and the Z-axis reverse direction represents the bottom direction, and that the Z-axis, X-axis, and Y-axis representations are meant only to facilitate description of the present utility model and to simplify description, and are not intended to indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present utility model.
Referring to fig. 1-4, the oil pump of the single-cylinder engine provided by the utility model is arranged on a rear tank assembly 6 of the engine, a cam shaft gear 7 is arranged in the rear tank assembly 6, the oil pump of the single-cylinder engine comprises an oil pumping cavity 1 and an oil pumping gear 2, the oil pumping cavity 1 is arranged at a position, close to the cam shaft gear 7, in the rear tank assembly 6, a connecting port 10 is arranged at one side, facing the cam shaft gear 7, of the oil pumping cavity 1, the oil pumping gear 2 is rotatably arranged in the oil pumping cavity 1, and one side of the oil pumping gear 2 is meshed with the cam shaft gear 7 through the connecting port 10.
In this embodiment, when the cam gear 7 rotates to drive the valve mechanism of the engine to work, since the oil pumping cavity 1 is provided with the connection port 10 towards one side of the cam gear 7, one side of the oil pumping gear 2 is meshed with the cam gear 7 through the connection port 10, so that the cam gear 7 drives the oil pumping gear 2 to rotate, thereby achieving the purpose of pumping oil in the oil pumping cavity 1, wherein the connection port 10 is used for enabling the oil pumping gear 2 to be meshed with the cam gear 7, so that the oil pumping gear 2 is driven to rotate in the oil pumping cavity 1 by means of rotation of the cam gear 7, that is, only one oil pumping gear 2 is arranged in the oil pump, which is beneficial to reducing cost, reducing the space of the oil pumping cavity 1 of the oil pump, further reducing the whole arrangement space of the oil pump, and meeting the requirement of compact arrangement of the single-cylinder engine.
Referring to fig. 1, preferably, a crank gear 8 is further disposed in the rear case assembly 6, the crank gear 8 is configured to mesh with the cam gear 7 to drive the cam gear 7, and the number of teeth of the cam gear 7 is twice that of the crank gear 8.
Specifically, in the engine, the crank gear 8 is provided as a driving wheel, the crank gear 8 is meshed with the cam gear 7, and when the crank gear 8 drives the cam gear 7 to rotate, the cam gear 7 drives a cam shaft in the engine to rotate, so as to drive a valve mechanism in the engine to work. According to the utility model, the oil pumping gear 2 is meshed with the cam shaft gear 7 to realize oil pumping, so that the cam shaft gear 7 is fully utilized, gears used during oil pumping are reduced, the size of an oil pump is reduced, and the requirement of compact arrangement of a single-cylinder engine is met.
In the present embodiment, the number of teeth of the cam gear 7 is twice that of the crank gear 8, and this structure enables the pump gear 2 to obtain a higher rotational speed, and the higher the rotational speed, the larger the pump oil amount. Therefore, the utility model can reduce the arrangement space of the oil pump on the premise of meeting the requirement of the same oil pumping amount as the original design.
Referring to fig. 1, preferably, the oil pumping chamber 1 includes a mounting groove 11 and a cover plate 12, the side wall of the mounting groove 11 facing the cam gear 7 is provided with the connection port 10, one axial end of the mounting groove 11 is provided with a mounting port 13, the oil pumping gear 2 is used for being mounted into the mounting groove 11 through the mounting port 13, and the cover plate 12 is detachably mounted at the mounting port 13 and is used for covering the mounting port 13.
Specifically, the end of the connection port 10 is in clearance fit with the cam gear 7, and the clearance range is smaller than 0.1mm, so that the leakage of engine oil is reduced.
In this embodiment, the installation opening 13 is configured to facilitate the installation of the oil pumping gear 2 into the installation groove 11, and the cover plate 12 is configured to cover the installation opening 13 so that the oil pumping cavity 1 can smoothly pump oil.
Referring to fig. 1, preferably, the mounting opening 13 is in communication with the connection opening 10, the cover 12 is used for covering a position where the connection opening 10 is in communication with the mounting opening 13, so as to cover a position where the cam gear 7 is meshed with the pump gear 2, and the cover 12 is in clearance fit with the cam gear 7.
Specifically, the side of the oil pumping gear 2 facing the cover plate 12 is flush with the side wall of the cam gear 7, the cover plate 12 is in clearance fit with the side wall of the oil pumping gear 2, and the clearance between the cover plate 12 and the oil pumping gear 2 and the clearance between the cover plate 12 and the cam gear 7 are smaller than 0.05mm, so that a small amount of oil discharge is ensured.
In this embodiment, the cover 12 covers the position where the cam gear 7 is meshed with the oil pumping gear 2, and is in clearance fit with the cam gear 7 and the oil pumping gear 2, so as to reduce oil leakage.
Referring to fig. 4, preferably, the single-cylinder engine oil pump further includes a flyweight seat 3 and a pin 4, the oil pumping gear 2 is fixedly connected with the flyweight seat 3, the pin 4 is fixed in the mounting groove 11, and the flyweight seat 3 is rotatably mounted on the pin 4.
Specifically, the oil pumping gear 2 is in interference press fit with the flyweight seat 3.
In this embodiment, when the cam gear 7 rotates, the oil pumping gear 2 is driven to rotate, so that the oil pumping gear 2 and the flyweight seat 3 rotate together around the pin shaft 4.
Referring to fig. 2, preferably, a low pressure oil chamber 61 and a high pressure oil chamber 62 are further disposed in the rear case assembly 6, the low pressure oil chamber 61 is communicated with the connection port 10 through a first oil passage 63, and the high pressure oil chamber 62 is communicated with the connection port 10 through a second oil passage 64.
Specifically, the second oil passage 64 communicates with the side wall of the mounting groove 11.
In this embodiment, the oil pumping gear 2 is press-fitted with the flyweight seat 3 in an interference manner, and rotates clockwise around the pin shaft 4 at a high speed, so that the engine oil is thrown into the high-pressure oil chamber 62 from the low-pressure oil chamber 61 through the first oil passage 63 and the second oil passage 64, and pumping is completed.
Referring to fig. 3, preferably, the single-cylinder engine oil pump further includes a pressure relief structure 5, the pressure relief structure 5 includes an oil drain hole and an oil blocking plug 52, the sidewall of the oil pumping cavity 1 is provided with the oil drain hole in a penetrating manner, and the oil blocking plug 52 is used for blocking the oil drain hole from the outside of the oil pumping cavity 1.
Specifically, the oil stopper 52 is a steel ball.
In the present embodiment, when the oil pressure in the pumping chamber is excessively large, the oil pushes up the oil stopper 52, and the oil is released through the oil drain hole, thereby releasing the pressure.
Referring to fig. 3, the drain hole is preferably disposed on the cover plate 12.
Preferably, the pressure relief structure 5 further includes an elastic member 53, the elastic member 53 is configured to be connected between the outer wall of the pumping chamber 1 and the oil stop 52, and the elastic member 53 maintains the oil stop 52 with a tendency to block the oil drain hole.
Specifically, the elastic member 53 is a spring, and the spring is disposed on the cover 12, so that the oil stop 52 is pressed by the spring and blocked in the oil drain hole.
In this embodiment, when the pressure in the oil pumping chamber 1 is too high, the oil pushes away the steel ball and the elastic piece, and releases the oil, until the pressure returns to normal, the steel ball is subjected to the action of the restoring force of the elastic piece, and returns to the state of blocking the oil drain hole, so as to ensure smooth oil pumping.
Referring to fig. 3, preferably, the pressure relief structure 5 further includes a limiting piece 51, where the limiting piece 51 is configured to be mounted on an outer wall of the pump oil cavity 1 near the oil drain hole, and the limiting piece 51 and the oil blocking plug 52 blocked at the oil drain hole are disposed at a distance along an axial direction of the oil drain hole.
In this embodiment, the limiting piece 51 is configured to limit a movement range of the steel ball caused by impact extrusion of the elastic piece, so as to prevent the steel ball from being impacted by the engine oil to be far from the oil drain hole, so that the elastic piece cannot drive the steel ball to reset.
Although the utility model is disclosed above, the scope of the utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the scope of the utility model.
Claims (10)
1. The utility model provides a single cylinder engine oil pump, sets up on the back case assembly (6) of engine, be provided with camshaft gear (7) in back case assembly (6), its characterized in that, single cylinder engine oil pump includes pump oil chamber (1) and pump oil gear (2), pump oil chamber (1) set up in be close to in back case assembly (6) the position department of camshaft gear (7), pump oil chamber (1) orientation one side of camshaft gear (7) is provided with connector (10), pump oil gear (2) be used for rotate install in pump oil chamber (1), just one side of pump oil gear (2) is passed through connector (10) with camshaft gear (7) mesh mutually.
2. The single-cylinder engine oil pump according to claim 1, wherein the oil pumping cavity (1) comprises a mounting groove (11) and a cover plate (12), the connecting port (10) is arranged on one side wall of the mounting groove (11) facing the cam shaft gear (7), a mounting opening (13) is arranged at one axial end of the mounting groove (11), the oil pumping gear (2) is used for being mounted into the mounting groove (11) through the mounting opening (13), and the cover plate (12) is detachably mounted at the mounting opening (13) and used for covering the mounting opening (13).
3. The single-cylinder engine oil pump according to claim 2, wherein the mounting port (13) is communicated with the connection port (10), the cover plate (12) is used for covering a position where the connection port (10) is communicated with the mounting port (13) so as to cover a position where the cam gear (7) is meshed with the oil pumping gear (2), and the cover plate (12) is in clearance fit with the cam gear (7).
4. The single-cylinder engine oil pump according to claim 2, further comprising a flyweight seat (3) and a pin shaft (4), wherein the oil pumping gear (2) is fixedly connected with the flyweight seat (3), the pin shaft (4) is fixed in the mounting groove (11), and the flyweight seat (3) is rotatably mounted on the pin shaft (4).
5. The single-cylinder engine oil pump according to claim 2, further comprising a pressure relief structure (5), wherein the pressure relief structure (5) comprises an oil drain hole and an oil blocking plug (52), the oil drain hole is arranged through the side wall of the pump oil cavity (1), and the oil blocking plug (52) is used for blocking the oil drain hole from the outside of the pump oil cavity (1).
6. The single-cylinder engine oil pump according to claim 5, characterized in that the drain hole is provided on the cover plate (12).
7. The single-cylinder engine oil pump according to claim 5, characterized in that the relief structure (5) further comprises an elastic member (53), the elastic member (53) being adapted to be connected between the outer wall of the pump oil chamber (1) and the oil stop (52), the elastic member (53) keeping the oil stop (52) in a tendency to block the oil drain hole.
8. The single-cylinder engine oil pump according to claim 7, wherein the pressure relief structure (5) further comprises a limiting piece (51), the limiting piece (51) is used for being mounted on the outer wall of the oil pumping cavity (1) near the oil drain hole, and the limiting piece (51) and the oil blocking plug (52) blocked at the oil drain hole are arranged at a distance along the axial direction of the oil drain hole.
9. The single-cylinder engine oil pump according to claim 1, wherein a low-pressure oil chamber (61) and a high-pressure oil chamber (62) are further arranged in the rear tank assembly (6), the low-pressure oil chamber (61) is communicated with the connection port (10) through a first oil passage (63), and the high-pressure oil chamber (62) is communicated with the connection port (10) through a second oil passage (64).
10. The single-cylinder engine oil pump according to claim 1, characterized in that a crank gear (8) is further provided in the rear case assembly (6), the crank gear (8) is for meshing with the cam gear (7) to drive the cam gear (7), and the number of teeth of the cam gear (7) is twice the number of teeth of the crank gear (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420515165.1U CN222102206U (en) | 2024-03-18 | 2024-03-18 | Single cylinder engine oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420515165.1U CN222102206U (en) | 2024-03-18 | 2024-03-18 | Single cylinder engine oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222102206U true CN222102206U (en) | 2024-12-03 |
Family
ID=93624307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420515165.1U Active CN222102206U (en) | 2024-03-18 | 2024-03-18 | Single cylinder engine oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222102206U (en) |
-
2024
- 2024-03-18 CN CN202420515165.1U patent/CN222102206U/en active Active
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| GR01 | Patent grant | ||
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