Oil filling mechanism of motor pump assembly and motor pump assembly

Abstract

The utility model belongs to the technical field of motor pumps, and particularly relates to a motor pump assembly oil filling mechanism and a motor pump assembly. The connecting element is provided with a first connecting end connected with the motor pump unit through the joint and the oil pipe; the second connecting end is configured to be connected with oil charging equipment when the motor pump unit is in an oil charging state and connected with a shock absorber when the second connecting end is connected and assembled with the shock absorber, and the first connecting end and the second connecting end are communicated through a channel in the connecting element; the third connecting end is provided with a valve element, and the valve element is configured to communicate or close a channel between the first connecting end and the second connecting end; the connector comprises a connecting part connected with the first connecting end; one end of the oil pipe is arranged outside the inserting part in a sleeving manner; the extrusion sleeve covers the outside of one end of the oil pipe; and the limiting part is positioned between the connecting part and the inserting part. And the second connecting end can be used as an oil filling port and a connecting port with the shock absorber, so that the structure is simplified, and the cost is reduced.

Description

Technical Field

[0001] This application belongs to the field of electric pump technology, and particularly relates to an oil filling mechanism for an electric pump assembly and an electric pump assembly. Background Technology

[0002] Fully active suspension, also known as active suspension, includes an electric motor pump unit, high-pressure oil lines, shock absorbers, and an active suspension domain controller. It can dynamically provide hydraulic power based on the vehicle's driving conditions (starting, braking, steering), driving speed, road vibration, and vehicle load, and dynamically and adaptively adjust the suspension damping and vehicle height. This type of suspension can provide excellent comfort and also increase the vehicle's stability and handling performance at high speeds or during sharp turns.

[0003] The motor-pump unit is connected to the vibration damper via a high-pressure oil pipe. One side of the high-pressure oil pipe connects directly to the inside of the motor-pump unit via a hydraulic connector, while the other side connects to the vibration damper via a hydraulic adapter. The system requires a certain pressure of hydraulic oil to operate normally.

[0004] The current main technical solution for oil injection is as follows: after the motor pump unit and the shock absorber unit are connected by a high-pressure oil pipe, a third connector with a one-way valve structure is set at the adapter near the shock absorber side. The injection of hydraulic oil through the third connector leads to a complex adapter structure and increased costs. Utility Model Content

[0005] To address the technical problem of complex oil filling structures in existing technologies, this application provides an oil filling mechanism for an electric motor pump assembly and an electric motor pump assembly.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is an oil filling mechanism for a motor pump assembly, including connecting elements, joints and oil pipes;

[0007] The connecting element has:

[0008] The first connection end is connected to the motor pump unit via the connector and oil pipe;

[0009] The second connection end is configured to connect to the oil filling device when the motor pump unit is in the oil filling state, and to connect to the vibration damper when it is connected and assembled with the vibration damper. The first connection end and the second connection end are connected through the channel inside the connecting element.

[0010] The third connection end has a valve core inside, which is configured to connect or close the channel between the first connection end and the second connection end.

[0011] The connector includes:

[0012] The connecting part is connected to the first connecting end;

[0013] The plug-in portion has one end of the oil pipe fitted onto the outside of the plug-in portion and is interference-fitted with the plug-in portion;

[0014] An extrusion sleeve covers the outside of one end of the oil pipe and is interference-fitted with the oil pipe;

[0015] The limiting part, located between the connecting part and the insertion part, is configured to prevent the extrusion sleeve from displacing along the length of the oil pipe.

[0016] In some embodiments, the valve core includes a threaded section, a valve stem section, and a plugging section arranged sequentially, with the diameters of the threaded section, valve stem section, and plugging section decreasing sequentially. The channel inside the connecting element includes a threaded section and a connecting section arranged sequentially. The threaded section is threadedly connected to the threaded section. The diameter of the valve stem section matches the inner diameter of the connecting section. The valve stem section is provided with an installation groove, and a sealing ring is provided in the installation groove.

[0017] In some embodiments, the second connecting end is located at the end of the connecting segment, the first connecting end is located on one side of the connecting segment, a transition step is provided at the connection between the second connecting end and the connecting segment, and the end of the blocking segment matches the shape of the transition step.

[0018] In some embodiments, the valve core is further provided with an extension section located at the end of the threaded section away from the valve stem section. An operating hole is provided on the end face of the extension section. The diameter of the extension section is smaller than the diameter of the threaded section. A retaining ring is provided at the opening of the third connecting end. The inner diameter of the retaining ring is larger than the diameter of the extension section but smaller than the diameter of the threaded section.

[0019] In some embodiments, the wall thickness of the connecting element in the communicating section is greater than the wall thickness in the screwed section.

[0020] In some embodiments, the first connecting end is provided with a mounting hole, and the connecting part is inserted and fixed in the mounting hole.

[0021] In some embodiments, the extrusion sleeve has a plurality of indentations along its axial direction.

[0022] In some embodiments, the limiting portion includes a limiting groove disposed on the connector, and the compression sleeve extends into the limiting groove with a snap-fit ​​portion, which snaps into the limiting groove.

[0023] In some embodiments, the oil pipe includes a rubber tube with at least one reinforcing layer disposed inside.

[0024] This utility model also provides a motor pump assembly, including a motor pump unit and the above-mentioned motor pump assembly oil filling mechanism, wherein the motor pump unit is connected to an oil pipe.

[0025] Beneficial effects: In this application, the first connecting end connects to the motor pump unit, and the second connecting end connects to the oil filling device to fill the oil pipe and motor pump unit with oil. After filling, the valve core in the third connecting end seals the communication channel between the first and second connecting ends, leaving the hydraulic oil inside the oil pipe and motor pump unit. This facilitates the transport of the oil pipe and motor pump unit as a whole after filling. When it needs to be connected and assembled with a shock absorber, the second connecting end can be directly connected to the shock absorber. That is, the second connecting end can serve as both an oil filling port and a connection port to the shock absorber, eliminating the need for an additional one-way valve structure for the oil filling port, simplifying the structure and reducing costs.

[0026] In addition, the fit between the plug and the extrusion sleeve enables a tight connection between the oil pipe and the connector, ensuring a tight seal. The limiting part prevents the extrusion sleeve from moving under high pressure, ensuring the reliability of the connection. Attached Figure Description

[0027] Figure 1 A schematic diagram of the cross-sectional structure of the oil filling mechanism for the motor pump assembly;

[0028] Figure 2 for Figure 1 Enlarged view of the local structure at point A;

[0029] Figure 3 This is a cross-sectional view of the oil pipe;

[0030] In the figure: 1. Connecting element; 11. First connecting end; 111. Mounting hole; 12. Second connecting end; 121. Transition step; 122. Sealing element; 13. Third connecting end; 131. Snap ring; 14. Channel; 141. Threaded section; 142. Connecting section; 15. Mounting base; 151. Connecting hole; 2. Connector; 21. Connecting part; 22. Insertion part; 221. Sealing ring; 23. Extrusion sleeve; 231. Indentation; 232. Protrusion; 233. Snap-fit ​​part; 24. Limiting part; 241. Annular protrusion; 3. Oil pipe; 31. Reinforcing layer; 4. Valve core; 41. Threaded section; 42. Valve stem section; 421. Mounting groove; 422. Sealing ring; 43. Blocking section; 44. Extension section; 45. Operating hole. Detailed Implementation

[0031] The present application will be further described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without making creative changes are within the protection scope of the present application.

[0032] like Figure 1As shown, the simple oil filling mechanism for a motor pump assembly provided in this application includes a connecting element 1, a connector 2, and an oil pipe 3. The connecting element 1 has three connection ports: a first connecting end 11, a second connecting end 12, and a third connecting end 13. In some embodiments, the second connecting end 12 and the third connecting end 13 are coaxially arranged, located at the upper and lower ends of the connecting element 1, respectively, and connected through a channel 14 inside the connecting element 1. The first connecting end 11 is located on one side of the connecting element 1 and communicates with the channel 14 inside the connecting element 1. A valve core 4 is installed inside the third connecting end 13, and the valve core 4 moves within the channel 14 of the connecting element 1, thereby achieving communication or closure between the first connecting end 11 and the second connecting end 12. The first connecting end 11 is connected to the motor pump unit through the connector 2 and the oil pipe 3. The second connecting end 12 is connected to the oil filling device when the motor pump unit is being filled with oil, and is connected to the vibration damper when assembled with the vibration damper. That is, the second connecting end 12 can not only serve as the oil filling port, but also as the port connected to the vibration damper.

[0033] The connector 2 is used to connect the first connecting end 11 and the oil pipe 3. It includes a connecting part 21, a plug-in part 22, a compression sleeve 23, and a limiting part 24. The connecting part 21 is connected to the first connecting end 11. Since the oil pipe 3 contains high-pressure hydraulic oil after filling and under normal working conditions, it is necessary to ensure the stability and sealing of the connection between the connector 2 and the oil pipe 3. One end of the oil pipe 3 is tightly inserted into the outside of the plug-in part 22 with an interference fit. The compression sleeve 23 covers the outside of one end of the oil pipe 3 and is also interference fitted with the oil pipe 3. Thus, one end of the oil pipe 3 is tightly positioned between the compression sleeve 23 and the plug-in part 22. In addition, the limiting part 24 restricts the displacement of the compression sleeve 23 along the length direction of the oil pipe 3, thereby ensuring the stability and sealing of the connection between the oil pipe 3 and the plug-in part 22.

[0034] During the oil filling process, the position of the movable valve core 4 within the channel 14 of the connecting element 1 connects the first connecting end 11 and the second connecting end 12, connecting the second connecting end 12 to the oil filling device. The hydraulic oil then passes sequentially through the second connecting end 12, the channel 14 within the connecting element 1, the first connecting end 11, the connector 2, and the oil pipe 3 to the motor pump unit. After the motor pump unit and the oil pipe 3 are filled with hydraulic oil at a certain pressure, the position of the movable valve core 4 within the channel 14 of the connecting element 1 closes the first connecting end 11 and the second connecting end 12, thus sealing the hydraulic oil within the oil pipe 3 and the motor pump. After disconnecting the oil filling device from the second connecting end 12, the oil-filled connecting element 1, oil pipe 3, and motor pump can be transported as a whole motor pump assembly. To prevent the second connecting end 12 from being contaminated, a dust cap can be placed on the second connecting end 12 after disconnecting the oil filling device. When the motor pump assembly needs to be connected to the shock absorber, remove the dust cap and directly connect the second connection end 12 to the shock absorber to form a suspension. During normal operation, move the valve core 4 again to make the first connection end 11 and the second connection end 12 connected.

[0035] like Figure 1 As shown, in order to ensure the sealing of the connection between the second connection end 12 and the oil filling equipment and the shock absorber, in some embodiments, a sealing element 122 is provided on the outside of the second connection end 12 and at the connection between the second connection end 12 and the connecting element 1.

[0036] Specifically, in some embodiments, such as Figure 1As shown, the valve core 4 includes a threaded section 41, a valve stem section 42, and a sealing section 43 arranged sequentially, with the diameters of the threaded section 41, valve stem section 42, and sealing section 43 decreasing sequentially. The channel 14 inside the connecting element 1 includes a threaded section 141 and a connecting section 142 arranged sequentially. The threaded section 41 is threadedly connected to the threaded section 141. The diameter of the valve stem section 42 matches the inner diameter of the connecting section 142. The valve stem section 42 is provided with a mounting groove 421, and a sealing ring 422 is provided in the mounting groove 421. By utilizing the threaded section 41 of the valve core 4 and the threaded section 141 of the channel 14 inside the connecting element 1, wherein the length of the threaded section 141 is greater than the length of the threaded section 41, the valve core 4 can move within the channel 14 inside the connecting element 1 when rotated, thereby achieving the sealing or connecting of the first connecting end 11 and the second connecting end 12 using the sealing section 43. The diameter of the sealing section 43 is set to be smaller than the inner diameter of the connecting section 142, so that the sealing section 43 and the connecting section 142 do not come into contact during the movement of the sealing section 43 within the cavity of the connecting section 142. This reduces the wear of the sealing section 43 and prevents it from wearing out after prolonged use, which could lead to ineffective sealing of the first connecting end 11 and the second connecting end 12. At the same time, a sealing ring 422 is provided on the valve stem section 42 to ensure the sealing performance of the valve stem section 42 within the connecting section 142, preventing oil from leaking from the threaded section 41 to the outside of the connecting element 1.

[0037] like Figure 1 As shown, in some embodiments, the third connecting end 13 and the second connecting end 12 are coaxially arranged, with a channel 14 inside the connecting element 1 between them. That is, the second connecting end 12 is located at the end of the connecting section 142, and the first connecting end 11 is located on one side of the connecting section 142. A transition step 121 is provided at the connection between the second connecting end 12 and the connecting section 142, and the end of the sealing section 43 matches the shape of the transition step 121. When the end of the sealing section 43 moves to contact and engage with the transition step 121, the second connecting end 12 can be closed, preventing it from communicating with the first connecting end 11. In addition, in some embodiments, the difference between the length H1 of the threaded section 141 and the length h1 of the threaded section 41 should be greater than the difference between the length H of the internal channel 14 of the connecting element 1 and the length h of the valve core 4, so as to ensure that the sealing section 43 can move a sufficient distance to ensure a tight fit with the transition step 121 and achieve a sealing effect. In addition, since the diameter of the threaded section 41 of the valve core 4 is larger than that of the valve stem section 42, a step is formed at the connection. The diameter of the threaded section 141 of the channel 14 is larger than that of the connecting section 142, and a step is also formed at the connection. The cooperation of the two steps can prevent damage caused by the valve core 4 being over-tightened, which would result in the sealing section 43 and the transition step 121 being too tightly fitted.

[0038] For ease of operation, in some embodiments, the valve core 4 is further provided with an extension section 44, located at the end of the threaded section 41 away from the valve stem section 42. An operating hole 45 is provided on the end face of the extension section 44. The diameter of the extension section 44 is smaller than the diameter of the threaded section 41. A retaining ring 131 is provided at the opening of the third connecting end 13. The inner diameter of the retaining ring 131 is larger than the diameter of the extension section 44 but smaller than the diameter of the threaded section 41. In one embodiment, the operating hole 45 is an internal hexagonal operating hole 45, allowing the valve core 4 to be screwed on with a tool. The retaining ring 131 limits the maximum upward distance of the valve core 4; that is, the step at the connection between the threaded section 41 and the extension section 44 contacts the retaining ring 131, preventing the valve core 4 from disengaging from the channel 14 inside the connecting element 1. In addition, in some embodiments, when the valve core 4 is at the maximum rising distance, the end face of the extension section 44 is flush with the end face of the third connection end 13, so that the operator can more intuitively observe whether the valve core 4 has moved to the maximum rising distance and avoid over-tightening.

[0039] In some embodiments, such as Figure 1 As shown, the wall thickness of the connecting element 1 in the connecting section 142 is greater than that in the screw section 141, thereby ensuring the rigidity of the connecting element 1 in the connecting section 142 and preventing high-pressure bursting. Meanwhile, to facilitate the installation and fixing of the connecting element 1 under normal suspension operation, in one embodiment, a mounting base 15 is extended from one bottom side of the connecting element 1, and a connecting hole 151 is formed on the mounting base 15 to facilitate direct fixing of the connecting element 1 to the shock absorber or other structures. This mounting base 15 is positioned opposite to the first connecting end 11 on the connecting element 1, which also increases the wall thickness of the connecting element 1 in the connecting section 142.

[0040] To facilitate the connection between the first connecting end 11 and the connector 2, in some embodiments, the first connecting end 11 is provided with a mounting hole 111, and the connecting part 21 is inserted and fixed in the mounting hole 111. For example... Figure 1 As shown, a stepped surface is provided at the connection between the mounting hole 111 and the first connecting end 11. After the connecting part 21 of the connector 2 is inserted into the mounting hole 111, one end of it abuts against the stepped surface. In one embodiment, the connecting part 21 is welded to the mounting hole 111 to improve the fixed connection strength and sealing performance.

[0041] like Figure 1 and 2As shown, to ensure the reliability of the connection between the oil pipe 3 and the compression sleeve 23, in one embodiment, the compression sleeve 23 is provided with multiple indentations 231 along its axial direction. The indentations 231 form a groove structure on the outer surface of the compression sleeve 23 and a protrusion 232 at a corresponding position on the inner surface of the compression sleeve 23, thereby further compressing and fixing the oil pipe 3, and firmly fixing the oil pipe 3 between the compression sleeve 23 and the insertion part 22. In some embodiments, the compression sleeve 23 is compressed by external force to form the indentations 231, and the multiple indentations 231 make the compression sleeve 23 have a corrugated structure. In one embodiment, a sealing ring 221 structure is also installed at the middle position of the outer surface of the insertion part 22 of the connector 2, which further improves the sealing performance between the inner surface of the oil pipe 3 and the insertion part 22.

[0042] In addition, such as Figure 1 As shown, in some embodiments, the limiting part 24 includes a limiting groove disposed on the connector 2. The limiting groove is formed by the gap between two annular protrusions 241 protruding from the connector 2. The extrusion sleeve 23 extends into the limiting groove with a locking part 233, which engages within the limiting groove. The limiting groove effectively restricts the movement of the locking part 233 along the length of the oil pipe 3, thus restricting the movement of the extrusion sleeve 23 along the length of the oil pipe 3.

[0043] like Figure 3 As shown, to improve the high-pressure resistance of the oil pipe 3, in some embodiments, the oil pipe 3 is at least a rubber tube at the end connected to the connecting element 1, and at least one reinforcing layer 31 is provided inside it. In some embodiments, the reinforcing layer is a nylon layer or a steel wire layer. The rubber tube has good sealing performance with the interference fit between the insertion part 22 and the extrusion sleeve 23. At the same time, the reinforcing layer 31 provided inside it can effectively improve the strength and high-pressure resistance of the rubber tube, and can also retain the flexibility of the rubber tube. In some embodiments, two reinforcing layers 31 are provided inside the rubber tube. The two reinforcing layers 31 can be all steel wire layers, all nylon layers, or one outer steel wire layer and the other nylon layer.

[0044] This utility model also provides a motor pump assembly, including a motor pump unit and the aforementioned motor pump assembly oil filling mechanism, wherein the motor pump unit is connected to the oil pipe 3. After connecting and filling the motor pump unit and the motor pump assembly oil filling mechanism, the second connecting end 12 is covered with a dust cap and can then be packaged and shipped as a whole. When it is necessary to assemble it with a shock absorber to form a suspension, the dust cap is removed, the second connecting end 12 is directly connected to the shock absorber, and the connecting element 1 is fixed to the shock absorber using the mounting seat 15 and the connecting hole 151 on the connecting element 1, thus completing the suspension assembly.

[0045] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of this application.

Claims

1. An oil filling mechanism for an electric motor pump assembly, comprising: The connecting element (1), the joint (2) and the oil pipe (3) are included. The connecting element (1) has: a first connecting end (11) connected with the motor pump unit through the joint (2) and the oil pipe (3); a second connecting end (12) configured to be connected with the oil filling device when the motor pump unit is in the oil filling state and to be connected with the shock absorber when the shock absorber is assembled, the first connecting end (11) and the second connecting end (12) being communicated through a channel (14) inside the connecting element (1); a third connecting end (13) provided with a valve core (4) configured to communicate or close the channel (14) between the first connecting end (11) and the second connecting end (12). The joint (2) includes: a connecting part (21) connected with the first connecting end (11); a plug-in part (22), one end of the oil pipe (3) being sleeved outside the plug-in part (22) and being in interference fit with the plug-in part (22); a pressing sleeve (23) covering the outside of one end of the oil pipe (3) and being in interference fit with the oil pipe (3); a limiting part (24) located between the connecting part (21) and the plug-in part (22) and configured to prevent the pressing sleeve (23) from moving along the length direction of the oil pipe (3).

2. The motor pump assembly oil fill mechanism of claim 1, wherein, The valve core (4) includes a threaded segment (41), a valve rod segment (42) and a plugging segment (43) arranged in sequence, and the diameters of the threaded segment (41), the valve rod segment (42) and the plugging segment (43) decrease in sequence, the channel (14) inside the connecting element (1) includes a screwing segment (141) and a communicating segment (142) arranged in sequence, the threaded segment (41) is in threaded connection with the screwing segment (141), the diameter of the valve rod segment (42) matches the inner diameter of the communicating segment (142), and the valve rod segment (42) is provided with a mounting groove (421) in which a sealing ring (422) is arranged.

3. The motor-pump assembly oil fill mechanism of claim 2, wherein, The second connecting end (12) is located at the end of the communicating segment (142), the first connecting end (11) is located at one side of the communicating segment (142), and a transition step (121) is arranged at the connection between the second connecting end (12) and the communicating segment (142), and the end of the plugging segment (43) matches the shape of the transition step (121).

4. The motor-pump assembly oil fill mechanism of claim 2 or 3, wherein, The valve core (4) is further provided with an extension segment (44) located at one end of the threaded segment (41) away from the valve rod segment (42), the extension segment (44) is provided with an operation hole (45) on the end face, the diameter of the extension segment (44) is smaller than that of the threaded segment (41), and the snap ring (131) arranged at the opening of the third connecting end (13) has an inner diameter greater than that of the extension segment (44) and smaller than that of the threaded segment (41).

5. The motor-pump assembly oil fill mechanism of claim 2 or 3, wherein, The wall thickness of the connecting element (1) at the communicating segment (142) is greater than that at the screwing segment (141).

6. The motor-pump assembly oil fill mechanism of any of claims 1-3, wherein, The first connecting end (11) is provided with a mounting hole (111), and the connecting part (21) is inserted and fixed in the mounting hole (111).

7. The motor-pump assembly oil fill mechanism of claim 1, wherein, The extrusion sleeve (23) is provided with a plurality of indentations (231) along the axial direction.

8. The motor-pump assembly oil fill mechanism of claim 1 or 7, wherein, The limiting part (24) comprises a limiting groove arranged on the joint (2), and the extrusion sleeve (23) extends the clamping part (233) to the limiting groove, and the clamping part (233) is clamped in the limiting groove.

9. The motor pump assembly oil fill mechanism of claim 1, wherein, The oil pipe (3) comprises a rubber pipe, and at least one reinforcing layer (31) is arranged in the rubber pipe.

10. An electric motor pump assembly characterized by, The motor pump unit is connected with the oil pipe (3).

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