A variable displacement oil pump

Abstract

This application provides a variable displacement oil pump, including a housing with a cavity. A rotor is movably mounted in the cavity and connected to a pump shaft, thereby enabling the rotor to rotate. A pump disc is also movably mounted in the cavity, with an inlet pipe and an outlet pipe for oil input and discharge. A first protrusion and a second protrusion are respectively provided on both sides of the housing, and an elastic support component and a screw component are respectively mounted thereon. When the pump disc is located in the cavity, it abuts against the contact pad of the elastic support component and the pad connected to the screw component. When oil enters through the inlet pipe, it is discharged towards the outlet pipe with the cooperation of the rotating rotor. The gap between the inner wall of the pump disc and the rotor forms the oil flow area. By rotating the screw component, the screw component can drive the pump disc to move, thereby adjusting the oil flow gap and thus changing the oil displacement.

Description

Technical Field

[0001] This application relates to the field of oil pump technology, and in particular to a variable displacement oil pump. Background Technology

[0002] The oil pump is a core component of the engine lubrication system. Its function is to pressurize the oil and deliver it to various moving parts to ensure lubrication, cooling and cleaning. However, the displacement of existing oil pumps cannot be dynamically adjusted according to actual needs. This causes fixed displacement pumps to continuously output excessive oil at high speeds, which consumes extra engine power. Furthermore, fixed displacement pumps cannot adjust the flow rate according to oil temperature, which may lead to overheating or undercooling of the oil. This can accelerate the aging of seals and cause the risk of oil leakage, resulting in increased maintenance costs and failure rates. Utility Model Content

[0003] The purpose of this invention is to provide a variable displacement oil pump to solve the above-mentioned problems.

[0004] The technical solution of this application is implemented as follows:

[0005] This application provides a variable displacement oil pump, including a housing with a cavity inside the housing. A rotor is movably mounted in the cavity. A pump shaft is mounted on one side of the housing, and a portion of the pump shaft extends into the cavity and connects to the rotor. A pump disc is also movably mounted in the cavity. The pump disc has a hollow portion. When the pump disc is located in the cavity, the pump disc abuts against both ends of the housing. The hollow portion forms an oil region, and the rotor is located in the oil region.

[0006] The pump disc has an inlet pipe and an outlet pipe, and the top of the housing has a slot. When the pump disc is located in the cavity, part of the inlet pipe is located outside the slot. The housing is also provided with an outlet port, and part of the outlet pipe is located inside the outlet port.

[0007] The housing has a first protruding part and a second protruding part on both sides respectively. The first protruding part has a groove, and an elastic support component is provided in the groove. The elastic support component includes a first elastic element. One end of the first elastic element is connected to the inner wall of the groove, and the other end is connected to a contact pad. The contact pad abuts against the outer periphery of the pump disc with the cooperation of the first elastic element.

[0008] The second protruding part has a threaded hole, and a screw is threadedly connected to the threaded hole. Part of the screw is located in the cavity and connected to a pad. The pad abuts against the outer periphery of the pump disc. By rotating the screw, the pad moves the pump disc closer to or away from the first protruding part, thereby changing the distance between the pump disc and the rotor.

[0009] In one embodiment, the rotor has a slot, and several slots are provided and spaced apart along the circumferential direction of the rotor. A blade is movably mounted on the slot.

[0010] When the rotor rotates in conjunction with the pump shaft, some of the blades abut against the inner wall of the pump disc.

[0011] In one embodiment, recesses are provided on both sides of the slot, and an elastic sealing component is provided in the recess. The elastic sealing component includes a second elastic member, one end of which is connected to the inner wall of the recess, and the other end is connected to a sealing gasket, with part of the sealing gasket located in the recess.

[0012] The sealing gasket has an arc-shaped groove. When the two sets of sealing gaskets abut against each other with the cooperation of the second elastic element, the two sets of arc-shaped grooves form a sealing area through which the liquid inlet pipe passes.

[0013] In one embodiment, the elastic support component further includes a guide rod located between two sets of first elastic elements, one end of the guide rod being connected to the contact pad, and the other end extending to the outside of the first protrusion.

[0014] When the guide rod moves with the cooperation of the first elastic element through the contact pad, the portion of the guide rod located outside the first protrusion increases or decreases.

[0015] In one embodiment, a portion of the screw member is located outside the second protruding extension and is fitted with a handwheel member. The handwheel member has grooves evenly distributed on its outer periphery, and several grooves form anti-slip patterns.

[0016] In one embodiment, the contact pad has an arc-shaped end on the side facing the pump disc, and when the contact pad abuts against the pump disc, the arc-shaped end fits against the outer periphery of the pump disc.

[0017] In one embodiment, a support base is provided at the bottom of the housing, and mounting holes are provided on both sides of the support base.

[0018] The advantages or beneficial effects of the above technical solutions include at least the following:

[0019] This application discloses a variable displacement oil pump. The pump disc and rotor are respectively installed within a housing. Since the housing has a first protruding portion for mounting elastic support components and a second protruding portion for mounting screw components on both sides, when the pump disc is inside the housing, its outer periphery abuts against the contact pad of the elastic support component and the pad on the screw component. The rotor rotates by connecting to the pump shaft. Because the gap between the inner wall of the pump disc and the rotor creates a clearance for oil flow, rotating the screw component pushes the pad against the pump disc, thus adjusting the clearance. Furthermore, the contact pad, in cooperation with the first elastic component, consistently supports the pump disc, enabling adjustment of the oil flow rate. This solves the problem of existing oil pumps lacking flexibility and unable to flexibly adjust their displacement as needed. Attached Figure Description

[0020] The accompanying drawings illustrate exemplary embodiments of the present application and, together with the description thereof, serve to explain the principles of the present application. These drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification.

[0021] Figure 1 A schematic diagram of the internal structure of the oil pump according to an embodiment of this application is provided;

[0022] Figure 2 A schematic diagram of the oil pump with the rotor removed according to an embodiment of this application is shown;

[0023] Figure 3 A cross-sectional structural schematic diagram of the oil pump according to an embodiment of this application is provided;

[0024] Figure 4 A structural schematic diagram of an oil pump according to an embodiment of this application is shown;

[0025] Figure 5 A schematic diagram of the rotor section according to an embodiment of this application is shown;

[0026] Figure 6 A schematic diagram of the pump disc structure according to an embodiment of this application is shown;

[0027] Figure 7 Examples of this application are presented. Figure 3 Enlarged view of point A in the middle;

[0028] Reference numerals: 1. Housing; 11. Cavity; 12. Rotor section; 121. Slot; 122. Blade component; 13. Pump shaft; 14. Slot; 141. Recess; 15. Liquid outlet; 16. First protrusion; 161. Groove; 17. Second protrusion; 171. Threaded hole; 18. Support base;

[0029] 2. Pump disc; 21. Hollowed-out section; 22. Inlet pipe; 23. Outlet pipe;

[0030] 3. Elastic support component; 31. First elastic element; 32. Contact pad; 321. Arc-shaped end; 33. Guide rod;

[0031] 4. Screw assembly; 41. Spacer block; 42. Handwheel assembly; 421. Groove;

[0032] 5. Elastic sealing component; 51. Second elastic element; 52. Sealing gasket; 521. Arc groove. Detailed Implementation

[0033] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0034] It should be noted that, where there is no conflict, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] It should be understood that the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this application are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0036] It should be noted that the terms "a" and "several" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0037] The names of the messages or information exchanged between multiple devices in the embodiments of this application are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0038] Reference Figures 1-6A variable displacement oil pump includes a housing 1 with a cavity 11. A rotor 12 is movably mounted within the cavity 11. A pump shaft 13 is mounted on one side of the housing 1, with a portion of the pump shaft 13 extending into the cavity 11 and connecting to the rotor 12. A pump disc 2 is also movably mounted within the cavity 11, and the pump disc 2 has a perforated portion 21. When the pump disc 2 is located within the cavity 11, it abuts against both ends of the housing 1, forming an oil region. The abutment between the pump disc 2 and both ends of the housing 1 creates an axial seal within the cavity 11, preventing oil leakage from the gap between the pump disc 2 and the housing 1 to the outside of the cavity 11. This ensures that the oil region formed by the perforated portion 21 remains closed. The rotor 12 is located within the oil region. The position of the pump disc 2 can be adjusted to change its position relative to the rotor 12. The relative relationship between the oil and the engine oil volume changes, thus providing core structural support for dynamic adjustment of low-speed small displacement and high-speed large displacement. It can adapt to the different oil requirements of the engine from idling to high-speed operation and reduce unnecessary energy consumption.

[0039] The pump disc 2 has an inlet pipe 22 and an outlet pipe 23. The top of the housing 1 has a slot 14. When the pump disc 2 is located in the cavity 11, part of the inlet pipe 22 is located outside the slot 14. The housing 1 is also provided with an outlet interface 15. Part of the outlet pipe 23 is located inside the outlet interface 15. The inlet pipe 22 for oil suction and the outlet pipe 23 for oil discharge are respectively set on the pump disc 2, forming independent inlet and outlet channels to avoid oil mixing during oil suction and discharge, ensuring clear oil delivery direction and stable pressure. The inlet pipe 22 is connected to the external pipeline through the slot 14. Both form a pipe and interface matching structure to reduce oil splashing and leakage during delivery.

[0040] The housing 1 has a first protruding extension 16 and a second protruding extension 17 on its two sides respectively. The first protruding extension 16 has a groove 161, and an elastic support component 3 is provided in the groove 161. The elastic support component 3 includes a first elastic element 31. The first elastic element 31 adopts a pressure spring or a telescopic spring in the prior art. One end of the first elastic element 31 is connected to the inner wall of the groove 161, and the other end is connected to a contact pad 32. The contact pad 32 is made of rubber. The contact pad 32 abuts against the outer periphery of the pump disc 2 with the cooperation of the first elastic element 31. The first elastic element 31 continuously pushes the contact pad 32 to fit against the outer periphery of the pump disc 2 through its own elastic force. No matter if the pump disc 2 changes position due to displacement adjustment or causes slight displacement due to working vibration, the first elastic element 31 can adaptively adjust the position of the contact pad 32 by extension and retraction, always maintaining the support force on the pump disc 2 and preventing the pump disc 2 from shaking in the cavity 11.

[0041] The second protruding extension 17 has a threaded hole 171, and a screw 4 is threadedly connected to the threaded hole 171. Part of the screw 4 is located in the cavity 11 and is connected to a pad 41. The pad 41 is made of rubber and abuts against the outer periphery of the pump disc 2. By rotating the screw 4, the pad 41 moves the pump disc 2 closer to or away from the first protruding extension 16, thereby changing the distance between the pump disc 2 and the rotor 12. The threaded engagement between the screw 4 and the threaded hole 171 has the characteristic of fine adjustment. For each rotation of the screw 4, the movement distance of the pad 41 is equal to the thread pitch, thereby precisely changing the distance between the pump disc 2 and the rotor 12. When the distance increases, the effective volume of the oil area increases, and the oil pump displacement increases. When the distance decreases, the volume decreases, and the displacement decreases. This precise adjustment can meet the engine's fine requirements for oil displacement.

[0042] Based on the above structure, the rotor 12 and pump disc 2 are sequentially placed in the cavity 11 of the housing 1, and the rotor 12 is connected to the pump shaft 13 of the external motor. When the pump disc 2 is located in the cavity 11, the outer periphery of the pump disc 2 abuts against the contact pad 32 of the elastic support member 3 and the pad 41 on the screw member 4, respectively. Then, the inlet pipe 22 and the outlet pipe 23 are connected to the external pipeline. When oil is introduced into the pump disc 2 through the inlet pipe 22, the rotor 12 rotates under the cooperation of the pump shaft 13 and transports the oil to the outlet pipe 23. When it is necessary to adjust the oil discharge rate... During operation, rotating the screw 4 moves the pad 41 relative to the pump disc 2 towards the first protruding extension 16, changing the distance between the pump disc 2 and the rotor 12. A smaller distance reduces oil flow, while a larger distance accelerates it, thus adjusting the oil pump's displacement speed. Furthermore, the contact pad 32 in the elastic support component 3, in cooperation with the first elastic component 31, always abuts against the pump disc 2. Through the cooperation of the pump disc 2 and the screw 4, operators can flexibly adjust the oil displacement, thus solving the problem of existing oil pumps having a fixed displacement and being unable to adapt to different situations.

[0043] In one embodiment, reference is made to Figure 1 , Figure 5 and Figure 6 The rotor 12 has a slot 121, which is provided in several places and distributed at intervals along the circumference of the rotor 12. Blade 122 is movably installed on the slot 121. When the rotor 12 rotates with the cooperation of the pump shaft 13, some of the blade 122 abuts against the inner wall of the pump disc 2. When the pump shaft 13 drives the rotor 12 to rotate at high speed, the blade 122 extends radially outward along the slot 121 under the action of centrifugal force. As the rotor 12 rotates, the volume of the working chamber changes periodically. By changing the extension length of the blade 122, the effective volume of the working chamber is changed, which adapts to the oil demand of the engine at low speed and small displacement and high speed and large displacement, and reduces energy loss.

[0044] In one embodiment, reference is made to Figure 1 , Figure 2 , Figure 3 and Figure 7 The groove 14 is provided with recesses 141 on both sides. An elastic sealing component 5 is provided in the recess 141. The elastic sealing component 5 includes a second elastic element 51. The second elastic element 51 adopts a pressure spring or a telescopic spring in the prior art. One end of the second elastic element 51 is connected to the inner wall of the recess 141, and the other end is connected to a sealing gasket 52. The sealing gasket 52 is made of oil-resistant material to avoid oil corrosion leading to sealing failure and extend the life of the sealing component. Part of the sealing gasket 52 is located in the recess 141, and the recess 141 can be used to accommodate the sealing gasket 52.

[0045] The sealing gasket 52 has an arc-shaped groove 521, the radius of which matches the outer diameter of the liquid inlet pipe 22. When the two sets of sealing gaskets 52 abut against each other with the cooperation of the second elastic member 51, the two sets of arc-shaped grooves 521 form a sealing area through which the liquid inlet pipe 22 passes. When the liquid inlet pipe 22 is installed, it passes between the two sets of sealing gaskets 52, squeezing the sealing gasket 52 into the recess 141. The second elastic member 51 is compressed and generates a reverse elastic force. If the liquid inlet pipe 22 undergoes a slight displacement due to vibration or temperature change, the second elastic member 51 can adaptively adjust the position of the sealing gasket 52 by stretching and contracting, always keeping the sealing gasket 52 in contact with the liquid inlet pipe 22 and avoiding gap leakage.

[0046] In one embodiment, reference is made to Figures 1-3 The elastic support component 3 also includes a guide rod 33, which is located between the two sets of first elastic elements 31. One end of the guide rod 33 is connected to the contact pad 32, and the other end extends to the outside of the first protrusion 16, limiting the movement trajectory of the contact pad 32 to be purely axial, thus ensuring the accuracy of the pump disc 2 position adjustment.

[0047] When the contact pad 32 moves with the cooperation of the first elastic member 31, the portion of the guide rod 33 located outside the first protrusion 16 increases or decreases. When the position of the pump disc 2 changes, the contact pad 32 moves axially under the pressure of the pump disc 2 or the elastic force of the first elastic member 31, and the guide rod 33 slides synchronously along the through hole of the first protrusion 16. If the contact pad 32 has a tendency to tilt, the guide rod 33 will be limited by the through hole, forcing the contact pad 32 to maintain its axial movement trajectory. Furthermore, by observing the change in the length of the portion of the guide rod 33 located outside the first protrusion 16, the movement distance of the contact pad 32 can be directly judged, indirectly reflecting the position adjustment amount of the pump disc 2.

[0048] In one embodiment, reference is made to Figures 1-3The screw component 4 is located on the outside of the second protruding extension 17 and is equipped with a handwheel component 42. The outer circumference of the handwheel component 42 is evenly distributed with grooves 421. Several grooves 421 form anti-slip textures. When the discharge volume needs to be manually adjusted, the operator holds the handwheel component 42 and rotates the handwheel to drive the screw component 4 to rotate synchronously. The screw drives the pump disc 2 or rotor part 12 to move through the thread transmission, thereby adjusting the volume of the working chamber. In addition, the grooves 421 increase the static friction between the hand and the handwheel component 42, preventing slippage during rotation, improving operational safety while ensuring adjustment accuracy.

[0049] In one embodiment, reference is made to Figure 2 and Figure 3 The contact pad 32 has an arc-shaped end 321 on the side facing the pump disc 2. When the contact pad 32 abuts against the pump disc 2, the arc-shaped end 321 fits against the outer periphery of the pump disc 2. When the elastic support component 3 works, the first elastic element 31 pushes the contact pad 32 toward the pump disc 2 until the arc-shaped end 321 fits against the outer periphery of the pump disc 2. Since the arc-shaped end 321 matches the curvature of the outer periphery of the pump disc 2, they form an annular surface contact when they come into contact. The contact area is much larger than that of the traditional flat end. The arc-shaped fit ensures that there is no gap in the contact, thereby reducing the pressure per unit area, avoiding rapid wear of the contact part due to stress concentration, and extending the service life of the contact pad 32 and the pump disc 2.

[0050] In one embodiment, reference is made to Figure 1 and Figure 2 The bottom of the housing 1 is provided with a support base 18. The support base 18 has mounting holes on both sides. The support base 18 is integrally formed or welded to the bottom of the housing 1 to provide overall support for the oil pump. When installing the oil pump, the support base 18 is attached to the mounting base of the equipment. The support base 18 disperses the vibration of the oil pump through its own rigidity and weight, avoiding the vibration amplification caused by direct contact between the housing 1 and the base, and at the same time preventing the oil pump from shifting due to vibration.

[0051] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0052] Those skilled in the art should understand that the above embodiments are merely for illustrative purposes and are not intended to limit the scope of this application. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of this application.

Claims

1. A variable displacement oil pump characterized by: The device includes a housing with a cavity inside. A rotor is movably mounted in the cavity. A pump shaft is mounted on one side of the housing, and a portion of the pump shaft extends into the cavity and connects to the rotor. A pump disc is also movably mounted in the cavity. The pump disc has a hollow portion. When the pump disc is located in the cavity, the pump disc abuts against both ends of the housing. The hollow portion forms an oil region, and the rotor is located within the oil region. The pump disc has an inlet pipe and an outlet pipe, and the top of the housing has a slot. When the pump disc is located in the cavity, part of the inlet pipe is located outside the slot. The housing is also provided with an outlet port, and part of the outlet pipe is located inside the outlet port. The housing has a first protruding part and a second protruding part on its two sides respectively. The first protruding part has a groove, and an elastic support component is provided in the groove. The elastic support component includes a first elastic element. One end of the first elastic element is connected to the inner wall of the groove, and the other end is connected to a contact pad. The contact pad abuts against the outer periphery of the pump disc with the cooperation of the first elastic element. The second protruding part has a threaded hole, and a screw is threadedly connected to the threaded hole. Part of the screw is located in the cavity and connected to a pad. The pad abuts against the outer periphery of the pump disc. By rotating the screw, the pad moves the pump disc closer to or away from the first protruding part, thereby changing the distance between the pump disc and the rotor part.

2. The variable displacement oil pump of claim 1, wherein: The rotor section has a slot, and several slots are provided and spaced apart along the circumferential direction of the rotor section. A blade is movably mounted on the slot. When the rotor rotates in cooperation with the pump shaft, some of the blades abut against the inner wall of the pump disc.

3. The variable displacement oil pump of claim 1, wherein: The groove is further provided with recesses on both sides, and an elastic sealing component is provided in the recess. The elastic sealing component includes a second elastic element, one end of which is connected to the inner wall of the recess, and the other end is connected to a sealing gasket. A portion of the sealing gasket is located in the recess. The sealing gasket has an arc-shaped groove. When the two sets of sealing gaskets abut against each other in cooperation with the second elastic element, the two sets of arc-shaped grooves form a sealing area through which the liquid inlet pipe passes.

4. The variable displacement oil pump of claim 1, wherein: The elastic support component further includes a guide rod, which is located between the two sets of the first elastic elements. One end of the guide rod is connected to the contact pad, and the other end extends to the outside of the first protrusion. When the contact pad moves in cooperation with the first elastic member, the portion of the guide rod located outside the first protruding extension increases or decreases.

5. The variable displacement oil pump of claim 1, wherein: A portion of the screw component is located outside the second protruding extension and is fitted with a handwheel component. The handwheel component has grooves evenly distributed on its outer circumference, and several of the grooves form anti-slip patterns.

6. The variable displacement oil pump according to claim 1, characterized in that: The contact pad has an arc-shaped end on the side facing the pump disc. When the contact pad abuts against the pump disc, the arc-shaped end fits against the outer periphery of the pump disc.

7. The variable displacement oil pump of claim 1, wherein: The bottom of the housing is provided with a support base, and the support base is provided with mounting holes on both sides.

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