Electronic oil pump with isolation structure and vehicle

Abstract

The invention discloses an electronic oil pump with an isolation structure and a vehicle. The electronic oil pump with the isolation structure comprises a shell, a supporting plate and a plurality of conductive columns used for transmitting electric energy. The shell is of a cylindrical structure; the supporting plate is arranged in the shell, the periphery of the supporting plate is connected with the shell in a sealed mode to divide the inner area of the shell into a first cavity provided with a driving plate and a second cavity provided with a power device, and a plurality of first through holes are formed in the supporting plate. The conductive column is arranged on the supporting plate in a penetrating mode through a first through hole in the supporting plate, the two ends of the conductive column are fixedly connected with the driving plate in the first cavity in the shell and the power device in the second cavity in the shell respectively, and the combination face of the first through hole and the conductive column is provided with a protrusion and a groove so that the supporting plate and the conductive column can be connected in a sealed mode. The area in the electronic oil pump is isolated into two parts through the supporting plate, it is guaranteed that under different temperature working conditions, oil gas or oil liquid is prevented from intruding into the part provided with the driving plate, and therefore it is guaranteed that the driving plate cannot lose efficacy due to oil liquid intruding.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic oil pumps, and in particular relates to an electronic oil pump and a vehicle with an isolation structure. Background Art

[0002] The electronic oil pump with oil-cooling structure power and isolation structure is an electronically controlled oil pump that uses oil to cool itself and provides power for hydraulic systems or lubrication systems. The electronic oil pump with oil-cooling structure power and isolation structure is divided into two types: self-cooling type and isolation type. The main difference lies in whether the internal motor structure of the electronic oil pump with isolation structure directly uses the oil in the pump head of the electronic oil pump with isolation structure for cooling. The self-cooling type directly introduces the pump head oil into the inner cavity to cool the stator and rotor of the built-in motor of the electronic oil pump with isolation structure, and the isolation type completely separates the pump head area with oil from the stator and rotor of the built-in motor of the electronic oil pump with isolation structure.

[0003] However, no matter which method is used for the electronic oil pump with oil cooling structure power isolation structure, there is always the possibility of oil gas (the intruded oil gas will also form oil after accumulation) or oil may invade the drive board in the electronic oil pump. Since the oil of the electronic oil pump with isolation structure is in a semi-fluid state at low temperature, the flow effect is very poor. As the vibration is transmitted during the operation of the whole vehicle, the intruded oil will oscillate in the drive board area and repeatedly impact the electrical components on the drive board that use the patch connection process. Under long-term impact, the electronic components will be separated from the PCB board, causing the drive board to fail, thereby causing the electronic oil pump with isolation structure to fail. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides an electronic oil pump and a vehicle with an isolation structure.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] In a first aspect, an electronic oil pump with an isolation structure is provided, wherein the electronic oil pump with an isolation structure comprises:

[0007] A cylindrical shell;

[0008] A support plate is arranged inside the shell, and its outer periphery is sealed and connected to the shell to separate the inner area of ​​the shell into a first chamber provided with a driving plate and a second chamber provided with a power device, and a plurality of first through holes are provided on the support plate;

[0009] A plurality of conductive posts for transmitting electric energy, which are provided on the support plate through the first through hole in the support plate, and the two ends of the conductive posts are respectively fixedly connected to the driving plate in the first chamber in the shell and the power device in the second chamber in the shell; and

[0010] The first through hole in the support plate is divided into a first part close to the driving plate and a second part close to the power device. The inner wall of the first part in the first through hole and the outer wall of the conductive column together form a cavity for accommodating a filling medium. A plurality of protrusions on the inner wall of the second part in the first through hole and a plurality of grooves on the conductive column are fitted and sealed with each other. A first sealing member is provided in the groove in the conductive column closest to the power device in the second chamber.

[0011] In some embodiments, the shell is sealedly connected to the rear end cover, and there is a contact gap of a distance between the driving plate and the rear end cover in the first chamber in the shell.

[0012] In some embodiments, the number of protrusions on the inner wall of the first through hole in the support plate is multiple, and the number of grooves in the conductive column is two more than the number of protrusions on the inner wall of the first through hole.

[0013] In some embodiments, the support plate further comprises:

[0014] A plurality of second through holes, circumferentially evenly distributed on the outer circumference of the support plate, and a plurality of first screws are passed through the second through holes to fix the support plate to the housing;

[0015] A crotch portion, used for accommodating a second sealing member for sealing a connection position between the support plate and the housing; and

[0016] The concave portion is formed by the support plate being concave toward the other side from the center position of the end surface of one side of the power device in the second chamber.

[0017] In some embodiments, the support plate is further provided with reinforcing ribs for preventing the support plate from deforming, and the reinforcing ribs include:

[0018] A mesh rib is arranged on the periphery of the first through hole on the end surface of the support plate on one side of the drive plate in the first chamber in the shell;

[0019] An annular rib is arranged at the periphery of the second through hole in each of the support plates, and the outward protrusion of the annular rib is 1-2 mm higher than the outer peripheral end surface of the second through hole in the support plate;

[0020] A first tie bar, arranged between adjacent ring bars, wherein the height of the first tie bar is equal to that of the ring bars;

[0021] A second tensioning bar is disposed between the annular rib and the concave portion of the support plate; and

[0022] A plurality of third tensioning bars with equal intervals are arranged between the outer periphery of the crotch portion of the support plate and the outer periphery of the concave portion of the support plate.

[0023] In some embodiments, a third through hole and a fourth through hole are respectively provided on both sides of the driving plate; a second screw passes through the third through hole in the driving plate to fix one side of the driving plate to the shell; the end of one end of the conductive column passes through the fourth through hole in the driving plate and is fixedly connected to the other side of the driving plate, and the end of one end of the conductive column is higher than the end surface of the driving plate.

[0024] In some embodiments, the power device comprises:

[0025] A stator is connected to one end of each of the conductive columns located in the second chamber of the housing; and a rotor, one end of which is sleeved with a bushing and is arranged in the concave portion of the support plate.

[0026] In some embodiments, the inner wall of the bushing is a smooth cylindrical surface, the outer wall of the bushing is provided with alternating protrusions and recesses, the inner wall of the recess in the support plate and the outer wall of the bushing are provided with alternating protrusions and recesses, and the matching arrangement makes the outer wall of the bushing and the inner wall of the recess in the support plate fit tightly, and a spiral groove is provided on the outer side of the protrusion in the bushing, and the setting direction of the spiral groove is the same as the rotation direction of the rotor in the power device.

[0027] In some embodiments, the number of phases of the stator in the power device, the number of first through holes in the support plate, and the number of conductive columns are all three; adjacent first through holes in the support plates have the same spacing angle with the center of the support plate as the center.

[0028] In a second aspect, a vehicle is provided, comprising all of the electronic oil pumps with isolation structures.

[0029] The beneficial effect of the present invention is that the present invention has an isolation structure, which isolates the area inside the electronic oil pump into two parts, ensuring that under different temperature conditions, oil gas or oil liquid cannot invade the partial area where the drive plate is provided, thereby ensuring that the drive plate will not fail due to oil liquid intrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 is an overall structural diagram of an electronic oil pump with an isolation structure provided in one embodiment of the present invention;

[0032] Figure 2Schematic diagram of force analysis of an electronic oil pump with an isolation structure provided in one embodiment of the present invention

[0033] Figure 3 is a schematic structural diagram of an end surface of one side of a support plate provided in one embodiment of the present invention;

[0034] Figure 4 is a schematic structural diagram of the other end surface of the support plate provided in one embodiment of the present invention;

[0035] Figure 5 is a schematic diagram of a cross-sectional structure of a support plate provided in one embodiment of the present invention;

[0036] Figure 6 is a schematic structural diagram of a conductive column provided in one embodiment of the present invention;

[0037] Figure 7 is a schematic structural diagram of a driving board provided in one embodiment of the present invention;

[0038] Figure 8 is a schematic structural diagram of a housing provided in one embodiment of the present invention at a first viewing angle;

[0039] Fig. 9 is a schematic structural diagram of a housing provided in one embodiment of the present invention at a second viewing angle;

[0040] Fig.10 is a schematic diagram of the connection structure between the support plate and the housing provided in one embodiment of the present invention;

[0041] Fig.11 is a schematic diagram of the connection structure between the drive plate and the housing provided in one embodiment of the present invention;

[0042] Fig.12 is a schematic structural diagram of a bushing provided in one embodiment of the present invention at a first viewing angle;

[0043] Fig.13 It is a schematic structural diagram of a bushing provided in one embodiment of the present invention at a second viewing angle. DETAILED DESCRIPTION

[0044] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0045] like Figure 1 As shown, an electronic oil pump with an isolation structure is provided, comprising a housing 10, a support plate 20 and a plurality of conductive columns 30 for transmitting electrical energy.

[0046] The housing 10 is a cylindrical structure. The support plate 20 is arranged inside the housing 10, and the outer periphery is sealed and connected to the housing 10 to separate the inner area of ​​the housing 10 into a first chamber 101 provided with a driving plate 40 and a second chamber 102 provided with a power device 50. The support plate 20 is provided with a plurality of first through holes 201, and the conductive column 30 is passed through the first through holes 201 in the support plate 20 and is arranged on the support plate 20, and the two ends of the conductive column 30 are respectively fixedly connected to the driving plate 40 in the first chamber 101 in the housing 10 and the power device 50 in the second chamber 102 in the housing 10.

[0047] like Figure 1 , 3 As shown in Figures 4 and 5, in one embodiment, the support plate 20 further includes a second through hole 202, a crotch portion 203 and a recess 204. The second through holes 202 are evenly distributed on the outer periphery of the support plate 20 and are used to connect the housing 10. Specifically, the housing 10 has an annular mounting step 103, which extends inward from the middle section of the housing 10. The first screw 205 passes through the second through hole 202 in each support plate 20 to lock and connect the outer periphery of the support plate 20 and the step end face of the annular mounting step 103 in the housing 10. The crotch portion 203 is used to place a second sealing member 207 that seals the connection position between the support plate 20 and the housing 10. The recess 204 is formed by the support plate 20 being concave toward the other side from the center position of the end face of one side of the power device 50 in the second chamber 102, and is used to assemble the rotor 502 in the power device 50.

[0048] like Figure 3 As shown, in one embodiment, the number of the second through holes 202 in the support plate 20 depends on the diameter of the first screw 205, and the straight line distance between the center points of the second through holes 202 in adjacent support plates 20 is approximately equal to 10 times the diameter of the first screw 205, and the number of the second through holes 202 in the support plate 20 can be inferred from this. It is used to fix the drive plate 40.

[0049] like Figure 3-11 As shown, in one embodiment, one side of the driving plate 40 is fixedly connected to the housing 10, and the other side of the driving plate 40 is fixedly connected to one end of the conductive column 30. Specifically, the housing 10 has a column base 104, and the column base 104 is arranged on the portion of the housing 10 constituting the first chamber 101. The driving plate 40 is provided with a third through hole 401 and a fourth through hole 402 on both sides thereof; the second screw 403 passes through the third through hole 401 in the driving plate 40 to lock and connect one side of the driving plate 40 with the column base 104 on the housing 10; the end of one end of the conductive column 30 passes through the fourth through hole 402 in the driving plate 40 and is higher than the end face of the driving plate 40, and soldering is adopted at the connection between the conductive column 30 and the driving plate 40 so that the other side of the driving plate 40 is fixedly connected to the conductive column 30.

[0050] Specifically, the electronic oil pump with an isolation structure also includes a rear end cover 60, a conductive cable 70, a special-shaped seal 601 and a rubber seal 602. One end of the conductive cable 70 is connected to an external power supply and the vehicle ECU, and the other end thereof passes through the rear end cover 60 to enter the interior of the housing 10 and is connected to the drive board 40. The special-shaped seal 601 is arranged on the joint surface of the rear end cover 60 and the housing 10 so that the rear end cover 60 is sealed and connected to the housing 10. The rubber seal 602 is wrapped around the outer periphery of the conductive cable 70 and is sealed and connected to the rear end cover 60, so that the housing 10, the rear end cover 60 and the rubber seal 602 together enclose a sealing area to prevent the oil in the sealing area from leaking out. The sealing method of the special-shaped seal 601 and the rubber seal 602 has been a mature application in the industry and will not be repeated here. One end of the conductive cable 70 is connected to the external power supply and the vehicle ECU, and the other end is sealed through the rear end cover 60 through the rubber sealing gasket 602 and connected to the driving board 40 inside the shell 10. The driving board 40 absorbs the electric energy provided by the external power supply according to the signal command of the vehicle ECU, and logically distributes the electric energy, and then transmits the logically controlled output electric energy to the power device 50 through the conductive column 30 inserted on the support plate 20. Finally, the power device 50 drives the pump head of the electronic oil pump to complete the process of oil suction and discharge.

[0051] It can be understood that the support plate 20 is arranged inside the shell 10, and the outer periphery is sealed and connected to the shell 10 to separate the internal area of ​​the shell 10 into a first chamber 101 provided with a drive plate 40 and a second chamber 102 provided with a power device 50, that is, the first chamber 101 is surrounded by the rear end cover 60, the rubber sealing gasket 602, a part of the shell 10 and the support plate 20, and is a protected electric energy logic distribution working area; the second chamber 102 is surrounded by another part of the shell 10 (the oil inlet 105 and the oil outlet 106 are both arranged on this part of the shell 10) and the support plate 20, and is an electric energy conversion working area containing oil, gas and oil.

[0052] In order to prevent the oil in the second chamber 102 from leaking into the first chamber 101 and causing the drive plate 40 disposed in the first chamber 101 to fail, it is necessary to ensure that:

[0053] (i) Under different temperature conditions, the connection between the support plate 20 and the housing 10 is always kept sealed. The specific processing method is: a second sealing member 207 is provided at the connection position between the support plate 20 and the housing 10 for sealing. The second sealing member 207 generally adopts an O-ring. This sealing method has been a mature application in the industry and will not be described in detail here.

[0054] (ii) Under different temperature conditions, the connection between the support plate 20 and the conductive column 30 is always kept sealed, and the specific processing method is as follows: the first through hole 201 in the support plate 20 is divided into a first part 2011 close to the driving plate 40 and a second part 2012 close to the power device 50, the inner wall of the first part 2011 in the first through hole 201 and the outer wall of the conductive column 30 together form a cavity 2014 for accommodating the filling medium 2013, a plurality of protrusions 2015 provided on the inner wall of the second part 2012 in the first through hole 201 and a plurality of grooves 301 provided on the conductive column 30 are mutually fitted and sealed, and a first sealing member 206 is provided in the groove 301 of the conductive column 30 closest to the power device 50 in the second chamber 102. In one embodiment, the first sealing member 206 is specifically configured as at least one O-ring.

[0055] like Figure 1-11 As shown, under different temperature conditions, the specific principle of the connection between the support plate 20 and the conductive column 30 always maintaining a sealed state is as follows:

[0056] For ease of explanation, we will Figure 1 Simplified to Figure 2 , the connection point where one side of the driving plate 40 is locked and connected with the housing 10 by the second screw 403 is set as the first fulcrum 801, and the pressure formed by the screw connection of the second screw 403 at the first fulcrum 801 is set as the first pressure 803, and then, on the other side of the first fulcrum 801, that is, the side where the driving plate 40 is connected with the conductive column 30, there will be a reaction force of the first pressure 803, and the reaction force is set as the second pressure 804. The connection point where the support plate 20 is locked and connected with the housing 10 by the first screw 205 is set as the second fulcrum 802, and the pressure formed by the screw connection of the first screw 205 at the second fulcrum 802 is set as the third pressure 805. Because the first fulcrum 801 and the second fulcrum 802 are both screwed on the shell 10 and are in a completely fixed state relative to the shell 10, and the side where the drive plate 40 is connected to the conductive column 30 is not fixedly connected to the shell 10, under the presence of the second pressure 804, the side where the drive plate 40 is connected to the conductive column 30 has a displacement tendency to move toward the rear end cover 60. Since the drive plate 40 and the conductive column 30 are welded to form a unified whole, the conductive column 30 also has a displacement tendency to move toward the rear end cover 60.

[0057] At room temperature, the specific processing method of the present invention for the connection between the support plate 20 and the conductive column 30 makes the conductive column 30 and the support plate 20 in the most reasonable sealing state, and due to the existence of the second pressure 804, the displacement trend of the conductive column 30 toward the rear end cover 60 will increase the bonding force between the conductive column 30 and the support plate 20 at the microscopic level, thereby enhancing the sealing effect.

[0058] It is understandable that because the conductive column 30 needs to conduct electricity, the material used is metal; in order to prevent the electric energy passing through the support plate 20 from short-circuiting with the rear end cover 60 and the housing 10 and causing electric shock, the support plate 20 should be made of non-conductive materials such as plastic and bakelite powder, preferably plastic. Furthermore, to ensure the reliability of the plastic material, it is preferably modified nylon. Therefore, at high temperatures, the expansion of the metal material of the conductive column 30 is smaller than the expansion of the plastic of the support plate 20; at low temperatures, the cold shrinkage of the metal material of the conductive column 30 is smaller than the cold shrinkage of the plastic of the support plate 20.

[0059] At high temperature, since the expansion amount of the metal material of the conductive column 30 is smaller than the expansion amount of the plastic of the support plate 20, the expansion amplitude of the protrusion 2015 on the inner wall of the second part 2012 of the first through hole 201 in the support plate 20 is larger than the expansion amplitude of the groove 301 in the conductive column 30, that is, the "U-shaped" side length of the groove 301 in the conductive column 30 is smaller than the "reverse U" perimeter of the protrusion 2015 in the first through hole 201 of the support plate 20, so that the protrusion 2015 in the first through hole 201 of the support plate 20 applies volume expansion pressure to each contact surface of the groove 301 in the conductive column 30, and this pressure makes the contact surfaces of the two fit more closely. Further, since the first sealing member 206 is provided in the groove 301 closest to the power device 50 in the second chamber 102 in the conductive column 30, the thermal expansion at this time will increase the interference compression amount of the first sealing member 206, thereby enhancing the sealing effect. Furthermore, due to the presence of the second pressure 804, the displacement trend of the conductive pillar 30 moving toward the rear end cover 60 will microscopically increase the bonding force between the conductive pillar 30 and the support plate 20, thereby enhancing the sealing effect. Therefore, under high temperature conditions, the connection between the conductive pillar 30 and the support plate 20 is also in a sealed state.

[0060] At low temperatures, since the metal material of the conductive column 30 shrinks less than the plastic material of the support plate 20, the protrusion 2015 on the inner wall of the second portion 2012 of the first through hole 201 in the support plate 20 shrinks more than the groove 301 in the conductive column 30, that is, the "U-shaped" side length of the groove 301 in the conductive column 30 is greater than the "inverse U" perimeter of the protrusion 2015 on the inner wall of the second portion 2012 of the first through hole 201 in the support plate 20, which will cause a local gap between the conductive column 30 and the support plate 20, thereby reducing the bonding force between the protrusion 2015 in the first through hole 201 of the support plate 20 and the groove 301 in the conductive column 30. At this time, due to the existence of the local gap, the second pressure 804 can drive the driving plate 40 and the conductive column 30 to move toward the rear end cover 60 together, and this displacement will stop after the groove 301 in the conductive column 30 and the protrusion 2015 on the inner wall of the second portion 2012 of the first through hole 201 in the support plate 20 are re-formed to fit the end surface. Furthermore, since the cavity 2014 formed by the inner wall of the first portion 2011 of the first through hole 201 and the outer wall of the conductive column 30 contains a filling medium 2013 (the filling medium 2013 is usually a medium with glue properties such as silicone, epoxy resin, gel, etc., that is, it is in a flowing state before being cured, and no longer in a flowing state after reaching a predetermined curing condition or working condition), on the one hand, the filling medium 2013 can automatically fill the local gap after the conductive column 30 is displaced to enhance the sealing effect; on the other hand, the filling medium 2013 can superimpose deformation stress during the displacement of the conductive column 30 and during the process of the conductive column 30 returning to the initial position after displacement; further, because the first seal 206 is arranged in the groove 301 of the conductive column 30 closest to the power device 50 in the second chamber 102, when the oil or oil gas invades from the connection between the support plate 20 and the conductive column 30, it must first pass through the first seal 206. The first seal 206 can form an oil medium passage to lock the oil or oil gas in the cavity of the first seal 206 and flow in a certain direction and path. Therefore, at this time, the conductive column 30 and the support plate 20 still have a multi-channel close connection relationship. In addition, under low temperature conditions, oil gas is easy to liquefy and oil is easy to semi-fluidize. The infiltration oil pressure at the connection between the conductive column 30 and the support plate 20 is itself lower than the infiltration oil pressure at high temperature and normal temperature. Therefore, under low temperature conditions, the connection between the conductive column 30 and the support plate 20 is also in a sealed state.

[0061] In order to prevent the driving plate 40 and the conductive pillar 30 from being displaced too far under the action of the second pressure 804 and causing irreversible displacement, as shown in FIG. Figure 1 As shown, in one embodiment, the housing 10 is sealed and connected to the rear end cover 60 , and a contact gap 806 is provided between the driving plate 40 and the rear end cover 60 in the first chamber 101 in the housing 10 .

[0062] It is understandable that when the temperature is too low, the local gap between the conductive column 30 and the support plate 20 may be too large, which in turn causes the displacement distance of the drive plate 40 and the conductive column 30 to be too large and produce a displacement distance that cannot be restored to the initial position after the temperature is restored. For this reason, there is a contact gap 806 between the drive plate 40 and the rear end cover 60 in the first chamber 101, thereby ensuring that the drive plate 40 will contact the rear end cover 60 after being displaced a certain distance in the direction of the rear end cover 60, thereby preventing further displacement from occurring.

[0063] In order to ensure that the protrusion 2015 on the inner wall of the first through hole 201 in the support plate 20 is completely fitted with the groove 301 in the conductive column 30, as shown in FIG. Figure 1 As shown, in one embodiment, assuming that the number of protrusions 2015 on the inner wall of the first through hole 201 in the support plate 20 is N, the number of grooves 301 in the conductive column 30 is N+2.

[0064] like Figure 1 As shown, in one embodiment, the power device 50 includes a stator 501 and a rotor 502. The stator 501 in the power device 50 is connected to the other end of each conductive column 30, and one end of the rotor 502 in the power device 50 with a bushing 503 is arranged in the concave portion 204 in the support plate 20.

[0065] It is understandable that the drive plate 40 controls the electric energy to be transmitted to the stator 501 in the power device 50 through the electronic oil pump, thereby forming a rotating magnetic field between the inner circle of the stator 501 in the power device 50 and the outer circle of the rotor 502 in the power device 50, and the rotating magnetic field drives the rotor 502 in the power device 50 to rotate, thereby driving the pump head of the electronic oil pump to suck and discharge oil. This rotation principle is well known in the industry and will not be repeated. Because the conductive column 30 is provided to connect the stator 501 in the power device 50 with the drive plate 40, the number of the conductive columns 30 and the number of the first through holes 201 in the support plate 20 to which the conductive columns 30 are transmitted are both set according to the number of phases of the stator 501 in the power device 50 (the number of phases of the stator is the number of winding groups of the stator, which indicates how many groups of windings there are inside the stator).

[0066] like Figure 3 As shown, in one embodiment, the stator 501 in the power device 50 is preferably a three-phase stator, that is, the number of phases of the stator 501 is three, and thus the number of the first through holes 201 in the support plate 20 and the number of the conductive columns 30 are also three; in one embodiment, the first through holes 201 in adjacent support plates 20 have the same interval angle with the center of the support plate 20 as the center of the circle.

[0067] In order to ensure that the rotor 502 in the power device 50 does not dislocate from the recess 204 in the support plate 20 when rotating, as shown in FIG. Figure 12-13As shown, in one embodiment, the inner wall of the bushing 503 on the rotor 502 is a smooth cylindrical surface, and the outer wall of the bushing 503 on the rotor 502 is provided with alternate protrusions 5031 and recesses 5032, and the inner wall of the recess 204 in the support plate 20 is arranged in cooperation with the protrusion 5031 so that the outer wall of the bushing 503 and the inner wall of the recess 204 in the support plate 20 are closely fitted, and the outer side of the protrusion 5031 in the bushing 503 is provided with a spiral groove 5033, and the setting direction of the spiral groove 5033 is the same as the rotation direction of the rotor 502 in the power device 50. In one embodiment, the spiral groove 5033 is preferably a continuous spiral groove 5033 that is easy to process and has the best anti-rotation effect. In addition, the spiral groove 5033 can also be set as a discontinuous spiral groove 5033, and can also be set as a segmented continuous or discontinuous annular groove.

[0068] It can be understood that there is a circumferentially wrapped contact connection relationship between the rotor 502 and the bushing 503. When the rotor 502 is repeatedly started and stopped, its torque will also be synchronously transmitted to the bushing 503. Then, the spiral groove 5033 of the protrusion 5031 provided on the outer side of the bushing 503 will always be in a tight fit with the object accommodating the bushing 503, that is, the inner wall of the recess 204 in the support plate 20, and will not be loose. This relationship is similar to the screwing fit relationship between the thread and the screw hole. When the rotor 502 moves axially, it can effectively prevent the rotor 502 from escaping from the recess 204 in the support plate 20.

[0069] In order to ensure that the support plate 20 is stable and does not deform under different temperature conditions, Figure 3-5 As shown, in one embodiment, the support plate 20 is further provided with reinforcing ribs 208, and the reinforcing ribs 208 include mesh ribs 2081, annular ribs 2082, first ribs 2083, second ribs 2084, and third ribs 2085. The mesh ribs 2081 are located on the periphery of the first through hole 201 on the end surface of the support plate 20 close to the driving plate 40 in the first chamber 101 in the housing 10. The annular ribs 2082 are located on the periphery of the second through hole 202 in each support plate 20, and the convex part thereof is 1-2 mm higher than the peripheral end surface of the second through hole 202 in the support plate 20. The first ribs 2083 are located between adjacent annular ribs 2082, and the height is set equal to that of the annular ribs 2082. The second ribs 2084 are located between the annular ribs 2082 and the concave portion 204 in the support plate 20. A plurality of third tie bars 2085 with equal intervals are located between the outer periphery of the crotch portion 203 of the support plate 20 and the outer periphery of the recessed portion 204 of the support plate 20 .

[0070] It can be understood that the mesh ribs 2081 effectively reduce the deformation of the thin-walled plane of the support plate 20, increase the strength of the first through hole 201 in the support plate 20, and prevent the first through hole 201 in the support plate 20 from deforming. After the second through hole 202 in the support plate 20 contacts the first screw 205 and generates compressive stress, it is easy to sink. The annular ribs 2082 can effectively reduce the area of ​​this sinking and limit it to an acceptable range. The compressive stress between adjacent first screws 205 is likely to cause the part between the second through holes 202 in the adjacent support plates 20 to bulge, so a first tie rib 2083 is also added between adjacent annular ribs 2082, similar to the zipper of a bridge, to enhance the strength of this section to offset the compressive stress between the first screws 205. Similarly, since the first screws 205 are evenly distributed around the outer circumference of the support plate 20, the compressive stress between adjacent first screws 205 may easily cause the center of the support plate 20 to bulge, so a second tie bar 2084 is set between the annular rib 2082 and the concave portion 204 of the support plate 20 to enhance the circumferential strength to offset the compressive stress between the first screws 205, and its principle is the same as the first tie bar 2083. The outer circumference of the crotch portion 203 of the support plate 20 and the outer circumference of the concave portion 204 of the support plate 20 can be regarded as two concentric circles (equivalent to the outer tire and the center hub of a bicycle tire, connected by the support of spokes), and multiple third tie bars 2085 with the same straight-line distance are set between the concentric circles, so as to ensure that the crotch portion 203 of the support plate 20 and the concave portion 204 of the support plate 20 oscillate concentrically, effectively transmit the impact force generated by the rotation of the rotor 502 in the concave portion 204 of the support plate 20, and enhance the stability of the support plate 20.

[0071] The above description is merely a preferred embodiment of one or more embodiments of the present specification and is not intended to limit one or more embodiments of the present specification. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present specification shall be included in the scope of protection of one or more embodiments of the present specification.

Claims

1. An electronic oil pump with an isolation structure, characterized in that: include: A cylindrical shell; A support plate is arranged inside the shell, and its outer periphery is sealed and connected to the shell to separate the inner area of ​​the shell into a first chamber provided with a driving plate and a second chamber provided with a power device, and a plurality of first through holes are provided on the support plate; A plurality of conductive posts for transmitting electric energy, which are provided on the support plate through the first through hole in the support plate, and the two ends of the conductive posts are respectively fixedly connected to the driving plate in the first chamber in the shell and the power device in the second chamber in the shell; and The first through hole in the support plate is divided into a first part close to the driving plate and a second part close to the power device. The inner wall of the first part in the first through hole and the outer wall of the conductive column together form a cavity for accommodating a filling medium. A plurality of protrusions on the inner wall of the second part in the first through hole and a plurality of grooves on the conductive column are fitted and sealed with each other. A first sealing member is provided in the groove in the conductive column closest to the power device in the second chamber.

2. The electronic oil pump with an isolation structure according to claim 1, characterized in that: The shell is sealed and connected to the rear end cover, and a distance of a contact gap is provided between the driving plate in the first chamber in the shell and the rear end cover.

3. The electronic oil pump with an isolation structure according to claim 1, characterized in that: The number of protrusions on the inner wall of the first through hole in the support plate is multiple, and the number of grooves in the conductive column is two more than the number of protrusions on the inner wall of the first through hole.

4. The electronic oil pump with an isolation structure according to claim 1, characterized in that: The support plate also includes: A plurality of second through holes, circumferentially evenly distributed on the outer circumference of the support plate, and a plurality of first screws are passed through the second through holes to fix the support plate to the housing; A crotch portion, used for accommodating a second sealing member for sealing a connection position between the support plate and the housing; and The concave portion is formed by the support plate being concave toward the other side from the center position of the end surface of one side of the power device in the second chamber.

5. The electronic oil pump with an isolation structure according to claim 4, characterized in that: The support plate is also provided with reinforcing ribs for preventing the support plate from deforming, and the reinforcing ribs include: A mesh rib is arranged on the periphery of the first through hole on the end surface of the support plate on one side of the drive plate in the first chamber in the shell; An annular rib is arranged at the periphery of the second through hole in each of the support plates, and the outward protrusion of the annular rib is 1-2 mm higher than the outer peripheral end surface of the second through hole in the support plate; A first tie bar is arranged between adjacent ring bars, and the height of the first tie bar is equal to that of the ring bars; A second tensioning bar is disposed between the annular rib and the concave portion of the support plate; and A plurality of third tensioning bars with equal intervals are arranged between the outer periphery of the crotch portion of the support plate and the outer periphery of the concave portion of the support plate.

6. The electronic oil pump with an isolation structure according to claim 1, characterized in that: A third through hole and a fourth through hole are respectively provided on both sides of the driving plate; a second screw passes through the third through hole in the driving plate to fix one side of the driving plate to the shell; the end of one end of the conductive column passes through the fourth through hole in the driving plate and is fixedly connected to the other side of the driving plate, and the end of one end of the conductive column is higher than the end surface of the driving plate.

7. The electronic oil pump with an isolation structure according to claim 4, characterized in that: The power device comprises: a stator connected to one end of each of the conductive posts located in the second chamber of the housing; and The rotor has one end with a bushing set in the concave portion of the support plate.

8. The electronic oil pump with an isolation structure according to claim 7, characterized in that: The inner wall of the bushing is a smooth cylindrical surface, and the outer wall of the bushing is provided with alternate protrusions and recesses. The inner wall of the recess in the support plate and the outer wall of the bushing are provided with alternate protrusions and recesses, which are matched to make the outer wall of the bushing and the inner wall of the recess in the support plate fit tightly. A spiral groove is provided on the outer side of the protrusion in the bushing, and the setting direction of the spiral groove is the same as the rotation direction of the rotor in the power device.

9. The electronic oil pump with an isolation structure according to claim 7, characterized in that: The number of phases of the stator in the power device, the number of the first through holes in the support plate and the number of the conductive columns are all three; the first through holes in adjacent support plates have the same interval angle with the center of the support plate as the center of the circle.

10. A vehicle, characterized in that: An electronic oil pump with an isolation structure comprising any one of claims 1 to 9.

Images