Oil pump suite for automobile
The design of the sealing mechanism solves the problem of insufficient sealing at the connection between the upper and lower housings of the oil pump. The use of components such as screws and sealing blocks for limiting and clamping ensures the sealing and stability of the oil pump assembly, prevents fuel leakage, and extends its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-03-31
AI Technical Summary
The existing oil pump has insufficient sealing at the connection between the upper and lower housings, which can easily lead to a decrease in sealing performance due to vibration. In addition, the bolt connection is prone to loosening, resulting in fuel leakage.
The sealing mechanism includes a screw, sealing block, rubber seat, centering plate, gasket and locking nut. Through the synergistic action of the limiting device and the clamping device, a tight connection between the upper housing and the flange is ensured, preventing damage to the components from excessive tightening.
It achieves efficient and reliable sealing of the oil pump kit, prevents fuel leakage, ensures stable operation of the oil pump in complex environments, avoids component damage, and improves sealing performance and service life.
Smart Images
Figure CN224064453U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil pump technology, and in particular to an automotive oil pump kit. Background Technology
[0002] An oil pump is a mechanical device used to transport oil, widely used in automobiles, industrial equipment, and many other fields. In automobiles, the main function of the oil pump is to deliver fuel from the fuel tank to the engine to ensure that the engine receives enough fuel to operate normally. It needs to precisely control the fuel supply and pressure according to the engine's operating conditions. With the continuous development of automotive technology, the performance requirements for oil pumps are also increasing. Early oil pumps may have had relatively simple structures and limited efficiency and precision. Today, in order to meet the requirements of efficient combustion, reduced fuel consumption, and reduced emissions, oil pumps are constantly being improved in design and manufacturing. For example, advanced materials are used to improve the wear resistance and reliability of oil pumps, and electronic control technology is used to achieve precise control of oil pumps to adapt to different driving conditions and engine load changes, thereby improving the overall performance and fuel economy of automobiles. Therefore, there is a particular need for an automotive oil pump kit.
[0003] However, most existing oil pumps are assembled from an upper and lower housing, which are installed by screwing in multiple bolts. The sealing performance of this bolted connection mainly depends on the tightening force of the bolts. If the tightening force of the bolts is too large or too small, it may lead to a decrease in sealing performance. When the oil pump is in use, it will inevitably be subjected to vibration. These vibrations may come from the external environment, the rotation of the impeller itself, or the pulsation of oil pressure. These vibrations can easily cause the connecting parts of the upper and lower housings of the oil pump, such as the bolts, to loosen, resulting in a decrease in the sealing performance of the oil pump connection. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides an automotive oil pump kit that enhances the sealing performance between the upper and lower housings of the oil pump, thus solving the problem of insufficient sealing performance in existing oil pumps.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] An automotive oil pump kit includes a lower housing, a flange mounted on the upper part of the lower housing, a first sealing plug mounted on the inner side of the flange, a sealing mechanism provided on the surface of the flange, a second sealing plug provided on the surface of the sealing mechanism, an upper housing mounted on the surface of the second sealing plug, a fixing ring connected to the surface of the upper housing, an oil inlet pipe connected to the bottom of the upper housing, a filter screen cylinder slidably connected to the inner side of the lower housing, a limit ring mounted on the top of the filter screen cylinder, a limit ring mounted on the bottom of the filter screen cylinder, an inner overflow pipe installed inside the filter screen cylinder, a return spring wound around the outer side of the inner overflow pipe, and an annular brush mounted on the bottom of the lower housing. The sealing mechanism includes a clamping device and a limiting device, the limiting device limiting the position after the clamping device is clamped.
[0007] Preferably, the sealing mechanism includes a screw, a sealing block, a rubber seat, a centering disc, a gasket, and a locking nut. The upper two ends of the flange are fixedly connected to the screw. The sealing block is sleeved on the surface of the screw. A rubber seat is also sleeved on the upper part of the screw. A centering disc is connected above the rubber seat. A gasket is connected above the centering disc. A locking nut is connected above the gasket. A limit device is provided on the inner side of the locking nut.
[0008] Preferably, the limiting device includes a telescopic hole, a telescopic spring, a limiting plate, a stop ratchet, and a stop groove. The inner side of the locking nut has a telescopic hole, the inner end of the telescopic hole is fixedly connected to a telescopic spring, one end of the telescopic spring is fixedly connected to a limiting plate, the outer end of the limiting plate is fixedly connected to a stop ratchet, and the surface of the screw has a stop groove.
[0009] Preferably, the rubber seat, the centering plate, and the gasket are all provided with through holes in their middle parts, and are sleeved on the outside of the screw through the through holes.
[0010] Preferably, the limiting plate forms a telescopic structure by means of a telescopic spring and a stop ratchet, and the position of the telescopic hole corresponds to the position of the stop groove.
[0011] Preferably, the position of the stop ratchet corresponds to the position of the stop groove, and the outer wall size of the stop ratchet matches the inner wall size of the stop groove.
[0012] Preferably, the top end of the reset spring is fixedly connected to the bottom surface of the second sealing plug, and the bottom end of the reset spring is fixedly connected to the bottom of the inner end of the filter screen cylinder.
[0013] Compared with the prior art, this utility model provides an automotive oil pump kit with the following advantages: Through the sealing mechanism, during the sealing assembly of the oil pump kit, the operator first places the upper housing above the flange, allowing the second sealing plug to initially align with the interface. Then, tightening the locking nut on the screw activates the clamping device. As the nut is screwed in, the gasket is compressed and transmits the force to the centering disc, which then evenly distributes it to the rubber seat. The rubber seat deforms and fits against the connection between the upper housing and the flange, achieving a preliminary seal. Simultaneously, the sealing block is pressurized, squeezing the edges of both. To enhance the sealing effect, during the tightening process, the stop groove on the screw approaches the stop ratchet. Initially, the stop ratchet is not in the stop groove, and the telescopic spring naturally extends. The limiting plate drives the stop ratchet to press against the outer wall of the screw. When the two are aligned, the spring force causes the stop ratchet to pop out and embed into the stop groove. If the nut is continued to be tightened, the stop ratchet will lock the screw. Due to its special structure, the resistance to reverse rotation is large, effectively limiting the excessive tightening of the nut. In conjunction with the clamping device, it ensures a tight seal and prevents damage to components or stripping of the screw, thus providing a guarantee for the safe and stable operation of the oil pump and preventing fuel leakage. Attached Figure Description
[0014] Figure 1 This is a side view of the structure of the present utility model;
[0015] Figure 2 This is a schematic diagram of the internal structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the sealing mechanism of this utility model;
[0017] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.
[0018] In the diagram: 1. Lower housing; 2. Flange; 3. First sealing plug; 4. Sealing mechanism; 401. Screw; 402. Sealing block; 403. Rubber seat; 404. Centering disc; 405. Gasket; 406. Locking nut; 407. Telescopic hole; 408. Telescopic spring; 409. Limiting plate; 410. Stop ratchet; 411. Stop groove; 5. Second sealing plug; 6. Upper housing; 7. Retaining ring; 8. Oil inlet pipe; 9. Filter screen cylinder; 10. Limiting ring; 11. Limiting ring; 12. Inner overflow pipe; 13. Return spring; 14. Annular brush. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figure 1-4 An automotive oil pump kit includes a lower housing 1, a flange 2 mounted on the upper part of the lower housing 1, a first sealing plug 3 mounted on the inner side of the flange 2, a sealing mechanism 4 provided on the surface of the flange 2, a second sealing plug 5 provided on the surface of the sealing mechanism 4, an upper housing 6 mounted on the surface of the second sealing plug 5, a fixing ring 7 connected to the surface of the upper housing 6, an oil inlet pipe 8 connected to the bottom of the upper housing 6, a filter screen cylinder 9 slidably connected to the inner side of the lower housing 1, a limit ring 10 mounted on the top of the filter screen cylinder 9, a limit ring 11 mounted on the bottom of the filter screen cylinder 9, an inner overflow pipe 12 installed inside the filter screen cylinder 9, a return spring 13 wound around the outer side of the inner overflow pipe 12, an annular brush 14 mounted on the bottom of the lower housing 1, and the sealing mechanism 4 including a clamping device and a limiting device.
[0021] In this embodiment, the sealing mechanism 4 includes a screw 401, a sealing block 402, a rubber seat 403, a centering disc 404, a gasket 405, and a locking nut 406. The screw 401 is fixedly connected to both ends of the upper part of the flange 2. The sealing block 402 is sleeved on the surface of the screw 401. A rubber seat 403 is also sleeved on top of the screw 401. A centering disc 404 is connected above the rubber seat 403. A gasket 405 is connected above the centering disc 404. A locking nut 406 is connected above the gasket 405. An inner limit device is provided. Through the clamping device, when the oil pump assembly needs to be sealed, the operator places the upper housing 6 above the flange 2, initially aligning the second sealing plug 5 with the relevant interface. Then, the clamping device of the sealing mechanism 4 is operated. Since screws 401 are fixedly connected to both ends of the flange 2, the operator tightens the locking nut 406 above the screws 401. As the locking nut 406 is gradually screwed downwards, the gasket 405 first experiences downward pressure, which is then transmitted to the centering plate 40. 4. The positive center plate 404 further distributes the pressure evenly to the rubber seat 403 below. Under pressure, the rubber seat 403 deforms and tightly fits the connection between the upper housing 6 and the flange 2, filling any possible tiny gaps and thus achieving a preliminary seal. At the same time, the sealing block 402 is subjected to downward pressure on the screw 401, which exerts a large squeezing force on the edges of the flange 2 and the upper housing 6, making them fit tightly together and further enhancing the sealing effect. At this time, the limiting device set inside the locking nut 406 begins to function. The limiting device can limit the excessive tightening of the locking nut 406, ensuring that the pressure of the entire clamping device is controlled within a reasonable range. This ensures both the tightness of the seal and avoids damage to components due to excessive pressure. Throughout the process, the clamping device and the limiting device work together. Through the tightening of the screw and nut and the transmission and distribution of pressure between the components, an efficient and reliable seal is achieved at the connection between the upper housing 6 and the flange 2. This provides a strong guarantee for the oil pump assembly to prevent fuel leakage during vehicle operation and ensures the stable and safe operation of the oil pump.
[0022] Furthermore, the limiting device includes a telescopic hole 407, a telescopic spring 408, a limiting plate 409, a stop ratchet 410, and a stop groove 411. The inner side of the locking nut 406 has a telescopic hole 407, the inner end of which is fixedly connected to the telescopic spring 408. One end of the telescopic spring 408 is fixedly connected to the limiting plate 409, and the outer end of the limiting plate 409 is fixedly connected to the stop ratchet 410. The surface of the screw 401 has a stop groove 411. With the limit device in place, when the operator tightens the locking nut 406, as it continues to rotate downwards, the stop groove 411 on the surface of the screw 401 gradually approaches the stop ratchet 410. Initially, since the stop ratchet 410 has not yet entered the stop groove 411, the extension spring 408 is in a naturally extended state. The limit plate 409 causes the stop ratchet 410 to press tightly against the outer wall of the screw 401. As the locking nut 406 continues to rotate, when the stop ratchet 410 and the stop... When the slots 411 are aligned, under the elastic force of the telescopic spring 408, the limiting plate 409 pushes the stop ratchet 410 outward and embeds it into the stop slot 411. At this time, if the operator continues to try to tighten the lock nut 406, the stop ratchet 410 will stop the screw 401 and prevent the lock nut 406 from rotating further. Due to the special structural design of the stop ratchet 410 and the stop slot 411, the stop ratchet 410 can only enter the stop slot 411 relatively easily in one direction, while it will encounter great resistance when rotating in the opposite direction. This effectively limits the over-tightening of the lock nut 406. In conjunction with the clamping device, while ensuring a tight seal, it effectively avoids problems such as damage to the sealing components or stripping of the screw caused by over-tightening. This provides a reliable safety guarantee for the long-term stable operation of the oil pump assembly, ensuring that the oil pump can safely and efficiently deliver fuel in the complex operating environment of the car and preventing dangerous situations such as fuel leakage.
[0023] Furthermore, the rubber seat 403, the centering disc 404, and the gasket 405 all have through holes in their middle sections, and are fitted onto the outside of the screw 401 through these through holes. The arrangement of the rubber seat 403, the centering disc 404, and the gasket 405 provides a stable and effective pressure transmission path for the entire clamping device. The rubber seat 403 has good flexibility and sealing properties; when subjected to downward pressure from the locking nut 406, it can deform according to the shape of the connection between the upper housing 6 and the flange 2, tightly fitting the gap and achieving a preliminary seal. The centering disc 405... 04 plays a crucial role in evenly distributing pressure. It transmits the concentrated pressure from the gasket 405 to the rubber seat 403 evenly, preventing excessive local pressure from damaging the rubber seat or causing uneven sealing. The gasket 405 is located at the top and directly contacts the locking nut 406. On the one hand, it increases the contact area with the locking nut 406, preventing damage to the nut or screw caused by local stress concentration during tightening. On the other hand, it can also more effectively and smoothly transmit the pressure of the nut to the centering plate 404. The three work together to ensure the tightness and reliability of the seal.
[0024] Furthermore, the limiting plate 409 forms a telescopic structure through the cooperation of the telescopic spring 408 and the stop ratchet 410. The position of the telescopic hole 407 corresponds to the position of the stop groove 411. The setting of the telescopic spring 408 gives the stop ratchet 410 the function of automatic telescopic extension. During the tightening of the locking nut 406, when the stop ratchet 410 and the stop groove 411 are not aligned, the telescopic spring 408 is in a naturally extended state, pressing the stop ratchet 410 tightly against the outer wall of the screw 401. Once the two are aligned, the elastic potential energy of the telescopic spring 408 is released instantly, pushing the stop ratchet 410 to quickly embed into the stop groove 411, thereby limiting the locking nut 406. When it is necessary to release the limit, the operator applies external force to overcome the elastic force of the telescopic spring 408, causing it to contract and drive the stop ratchet 410 out of the stop groove 411. After the operation is completed, the telescopic spring 408 can automatically return to its original state, preparing for the next limit operation, which greatly improves the convenience and reliability of the limit operation.
[0025] In addition, the position of the stop ratchet 410 corresponds to the position of the stop groove 411, and the outer wall size of the stop ratchet 410 matches the inner wall size of the stop groove 411. Through the setting of the stop ratchet 410 and the stop groove 411, precise control of the turning angle and position of the lock nut 406 is achieved. Since the two are matched in size, after the stop ratchet 410 is embedded in the stop groove 411, it can form a stable locking structure, effectively preventing the lock nut 406 from rotating further. Moreover, the stop ratchet 410 can only enter the stop groove 411 relatively easily in a specific direction. When rotating in the opposite direction, it encounters great resistance. This one-way locking characteristic ensures that even if the lock nut 406 is affected by external forces such as vibration and bumps during the operation of the oil pump, it will not loosen, maintain the stability of the sealing pressure, ensure the sealing performance of the oil pump assembly, and prevent safety hazards such as fuel leakage.
[0026] It is worth noting that the top of the return spring 13 is fixedly connected to the bottom surface of the second sealing plug 5, and the bottom of the return spring 13 is fixedly connected to the bottom of the inner end of the filter screen cylinder 9. Through the setting of the return spring 13, during the operation of the oil pump, when fuel flows into the filter screen cylinder 9, it will generate a downward impact force on the filter screen cylinder 9, causing its position to shift downwards. At this time, the return spring 13 is compressed, storing elastic potential energy. When the fuel flow rate decreases or stops, the return spring 13 releases the elastic potential energy, pushing the filter screen cylinder 9 upwards to return to its original position, ensuring it always remains in a suitable working position and guaranteeing the stability of the fuel filtration effect. Simultaneously, the presence of the return spring 13 can also buffer the impact force of fuel on the filter screen cylinder 9 to a certain extent, reducing the risk of damage to the filter screen due to frequent stress, extending the service life of the filter screen cylinder 9, and thus ensuring the continuous and efficient filtration of fuel by the oil pump, providing clean fuel to the engine and maintaining the stable operation of the vehicle's power system.
[0027] During use, when the car is started and running, fuel flows into the upper housing 6 through the fuel inlet pipe 8. Since the fuel inlet pipe 8 is connected to the bottom of the upper housing 6, the fuel, under the action of gravity and the pressure generated by the fuel pump, impacts directly downwards. At this time, the second sealing plug 5 works in conjunction with the first sealing plug 3 to effectively prevent fuel leakage from the connection between the upper and lower housings, ensuring that the fuel can only flow into the lower housing 1 along a predetermined path. After entering the lower housing 1, the fuel first contacts the filter screen 9. Under the constraint of the limiting ring 10 and the limiting ring 11, the filter screen 9 can slide up and down along the inner side of the lower housing 1 within a certain range. The high-speed impact of the fuel on the filter screen 9 drives the fuel to... The return spring 13 is compressed, causing the filter cylinder 9 to move downwards. However, when the fuel flow rate decreases, the return spring 13 releases its elastic potential energy, pushing the filter cylinder 9 upwards to maintain its stable filtration position. The filter cylinder 9 performs initial filtration of the fuel, intercepting larger particles of impurities, purifying the fuel, ensuring the normal operation of subsequent internal components of the fuel pump, and preventing wear and blockage caused by impurities. After initial filtration, a portion of the fuel flows into the inner overflow pipe 12. The function of the inner overflow pipe 12 is to overflow excess fuel back to the fuel tank when the fuel pressure is too high, thereby maintaining stable fuel pressure inside the fuel pump and preventing abnormal pressure from affecting the normal operation of the fuel pump and engine. During operation, if minute impurities remain in the fuel as it flows through the inner overflow pipe 12, the return spring 13, while buffering the fuel impact, also assists in shaking the filter screen cylinder 9, further dislodging the impurities adsorbed on the filter screen and allowing them to be discharged with the fuel flow. This reduces filter screen clogging and extends its service life. Simultaneously, the annular brush 14, fixed to the bottom of the lower housing 1, moves relative to the inner wall of the bottom of the lower housing 1 due to vibrations generated by vehicle movement and the impact of fuel flow, continuously cleaning the bottom of the lower housing 1 to prevent impurities from accumulating there, ensuring smooth fuel flow and preventing impurities from re-mixing into the filtered fuel. In this process, the fuel, after thorough filtration and pressure regulation, is pressurized by the fuel pump and delivered to the engine at a stable pressure and flow rate through the fuel outlet pipe connected to the fuel pump assembly. The engine precisely controls the fuel injection quantity according to its different operating conditions, ensuring complete combustion of the fuel within the engine to provide power to the vehicle. Throughout this process, the sealing mechanism 4 ensures the internal sealing of the fuel pump assembly, and the limiting device precisely controls the pressure of the clamping device to prevent fuel leakage or component damage due to pressure issues. All components work closely together to ensure the efficient, stable, and safe operation of the automotive fuel pump assembly, providing a reliable fuel supply to the vehicle's power system. Ultimately, the sealing function of the entire fuel pump is achieved, making the process convenient and quick.
[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An oil pump kit for an automobile comprising a lower housing (1), characterized in that: The upper side of the lower shell (1) is provided with a flange plate (2), the inner side of the flange plate (2) is provided with a first sealing plug (3), the surface of the flange plate (2) is provided with a sealing mechanism (4), the surface of the sealing mechanism (4) is provided with a second sealing plug (5), the surface of the second sealing plug (5) is provided with an upper shell (6), the surface of the upper shell (6) is connected with a fixed ring (7), the bottom of the upper shell (6) is connected with an oil inlet pipe (8), the inner side of the lower shell (1) is connected with a filter screen cylinder (9) in a sliding mode, the top of the filter screen cylinder (9) is provided with a limiting ring (10), the bottom of the filter screen cylinder (9) is provided with a limiting ring (11), the inside of the filter screen cylinder (9) is provided with an inner overflow pipe (12), the outer side of the inner overflow pipe (12) is wound with a reset spring (13), and the bottom of the lower shell (1) is provided with an annular brush (14). The sealing mechanism (4) comprises a pressing device and a limiting device.
2. An oil pump kit for an automobile according to claim 1, characterized by: The sealing mechanism (4) comprises a screw rod (401), a sealing pressing block (402), a rubber seat (403), a concentric socket disc (404), a gasket (405) and a locking nut (406), the upper side of the flange plate (2) is fixedly connected with the screw rod (401), the surface of the screw rod (401) is sleeved with the sealing pressing block (402), the upper side of the screw rod (401) is further sleeved with the rubber seat (403), the upper side of the rubber seat (403) is connected with the concentric socket disc (404), the upper side of the concentric socket disc (404) is connected with the gasket (405), the upper side of the gasket (405) is connected with the locking nut (406), and the inner side of the locking nut (406) is provided with a limiting device.
3. An oil pump kit for an automobile according to claim 2, wherein: The limiting device comprises a telescopic hole (407), a telescopic spring (408), a limiting plate (409), a stop ratchet (410) and a stop groove (411), the inner side of the locking nut (406) is provided with the telescopic hole (407), the inner end of the telescopic hole (407) is fixedly connected with the telescopic spring (408), one end of the telescopic spring (408) is fixedly connected with the limiting plate (409), the outer end of the limiting plate (409) is fixedly connected with the stop ratchet (410), and the surface of the screw rod (401) is provided with the stop groove (411).
4. An oil pump kit for an automobile as set forth in claim 2, characterized in that: The middle part of the rubber seat (403), the concentric socket disc (404) and the gasket (405) is provided with a through hole, and the through hole is sleeved on the outer side of the screw rod (401).
5. An oil pump kit for an automobile as set forth in claim 3, characterized in that: The limiting plate (409) and the stop ratchet (410) are matched with each other to form a telescopic structure through the telescopic spring (408), and the position of the telescopic hole (407) corresponds to the position of the stop groove (411).
6. An oil pump kit for an automobile as set forth in claim 3, characterized in that: The position of the stop ratchet (410) corresponds to the position of the stop groove (411), and the outer wall size of the stop ratchet (410) is consistent with the inner wall size of the stop groove (411).
7. An oil pump kit for an automobile as set forth in claim 1, characterized in that: The top end of the reset spring (13) is fixedly connected with the bottom surface of the second sealing plug (5), and the bottom end of the reset spring (13) is fixedly connected with the inner end bottom of the filter screen cylinder (9).