CN213807831U

CN213807831U - Pump cover of pump device, pump device and vehicle

Info

Publication number: CN213807831U
Application number: CN202021897637.2U
Authority: CN
Inventors: 化豪爽; 曹小军; 付威; 葛笑
Original assignee: Guangdong Welling Auto Parts Co Ltd; Anhui Welling Auto Parts Co Ltd
Current assignee: Guangdong Welling Auto Parts Co Ltd; Anhui Welling Auto Parts Co Ltd
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2021-07-27
Anticipated expiration: 2030-09-03

Abstract

The application provides a pump cover of a pump device, the pump device and a vehicle. The pump cover includes: the cover comprises a cover body, a first cover and a second cover, wherein the cover body is provided with an input port and an output port; the first bearing part is connected with the cover body, an accommodating cavity with an opening at one end is formed by the first bearing part in a surrounding manner, and the first bearing part is used for being in clearance fit with a rotating shaft of the pump device; and the first lubricating flow path is communicated with the accommodating cavity and the input port, is communicated with the accommodating cavity and the output port and is used for providing a lubricating medium for the accommodating cavity so as to lubricate the first bearing part. This application utilizes first bearing portion as slide bearing, supports the pivot of pump unit, and adopts the form of blind hole for the one end that the pivot inserted the pump cover can be sealed up, thereby prevents that lubricating medium from flowing along the pivot and leading to revealing, and then has improved the efficiency of pump. Meanwhile, the first bearing part is lubricated by the first lubricating flow path, so that a lubricating film can be formed between the first bearing part and the rotating shaft, and the abrasion between the first bearing part and the rotating shaft is effectively reduced.

Description

Pump cover of pump device, pump device and vehicle

Technical Field

The application relates to the technical field of pump devices, in particular to a pump cover of a pump device, the pump device and a vehicle.

Background

At present, the scheme that one end of a rotating shaft of a pump device, which is connected with a pump gear, is not sealed is adopted, namely one end of the rotating shaft, which is connected with the pump gear, is directly exposed outside, so that part of lubricating medium can flow out along the rotating shaft, the leakage amount of the lubricating medium is larger, and the pump efficiency is lower.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above technical problems, an object of the present application is to provide a pump cover of a pump apparatus.

It is another object of the present application to provide a pump assembly that includes the pump cap described above.

It is a further object of the present application to provide a vehicle comprising the above pump arrangement.

In order to achieve the above object, according to an embodiment of a first aspect of the present application, there is provided a pump cover of a pump apparatus, including: a cap body provided with an input port and an output port; the first bearing part is connected with the cover body, an accommodating cavity with an opening at one end is formed by the first bearing part in a surrounding manner, and the first bearing part is used for being in clearance fit with a rotating shaft of the pump device; and the first lubricating flow path is communicated with the accommodating cavity and the input port, is communicated with the accommodating cavity and the output port, and is used for providing a lubricating medium for the accommodating cavity so as to lubricate the first bearing part.

The pump cover of pump unit that this application first aspect's embodiment provided utilizes first bearing portion as the slide bearing, supports pump unit's pivot, and holds the chamber in the first bearing portion and adopt the form of blind hole for the pivot inserts the one end of pump cover and can be dead by the shutoff, thereby prevents that lubricating medium (specifically can be but not be limited to machine oil, water base liquid, mineral oil, vegetable oil etc.) from flowing out along the pivot and leading to revealing, and then has improved the efficiency of pump. Meanwhile, the first bearing part is lubricated by the first lubricating flow path, so that a layer of lubricating film (such as an oil film) can be formed between the first bearing part and the rotating shaft, the friction and the abrasion between the first bearing part and the rotating shaft are effectively reduced, the reduction of the energy consumption of a product is facilitated, and the service life of the product is prolonged.

It will be appreciated that in the present application the lubricating medium is a liquid lubricating medium, which ensures that the lubricating medium can flow along the first lubrication flow path.

In addition, the pump cover of the pump device in the above embodiment provided by the present application may further have the following additional technical features:

according to an embodiment of the present application, the first lubrication flow path includes: the throttling hole is arranged on the first bearing part and communicated with the output port and the accommodating cavity; the first throttling groove is arranged on the first bearing part and communicated with the accommodating cavity and the input port.

The first lubrication flow path includes an orifice and a first throttle groove. The orifice is arranged on the first bearing part and is connected with the output port and the accommodating cavity, so that the lubricating medium at the output port can enter the accommodating cavity through the orifice, and the communication between the output port and the accommodating cavity is realized. The first throttling groove is formed in the first bearing portion and communicated with the accommodating cavity and the input port, so that the lubricating medium in the accommodating cavity can flow to the input port through the first throttling groove, and the accommodating cavity is communicated with the input port. Meanwhile, the throttling hole and the first throttling groove play a role in throttling and pressure reduction, so that the lubricating medium at the output port smoothly flows into the accommodating cavity through the throttling hole, and the lubricating medium in the accommodating cavity smoothly flows to the input port through the first throttling groove, so that the flowability of the lubricating medium in the first lubricating flow path is improved, and the lubricating effect is further improved. In addition, the throttling hole and the first throttling groove are arranged on the first bearing part, the throttling hole can be directly arranged in a mode of slotting and perforating on the first bearing part, the structure is simple, and extra sealing is not needed.

According to an embodiment of the present application, the first lubrication flow path further comprises: the first lubricating groove is arranged on the cavity wall of the accommodating cavity and extends towards two ends of the accommodating cavity.

Establish first lubrication groove on holding the chamber wall in chamber, increased the capacity that holds the chamber in other words, therefore be favorable to increasing the volume that holds the lubricated medium of intracavity, and the continuous lubricated medium in the first lubrication groove can play good lubrication action to first bearing portion to improve lubricated effect. Simultaneously, because first lubrication groove extends to the both ends that hold the chamber, can play the ascending drainage effect of axial to the lubricated medium that holds the intracavity for the lubricated medium that holds the intracavity can extend to the axial both ends that hold the chamber along first lubrication groove fast, thereby the axial length of extension lubricated membrane improves the homogeneity of lubricated membrane in the axial, further improves the lubricated effect to first bearing portion.

According to an embodiment of the application, the first lubrication groove is arranged in an axial direction of the first bearing portion.

The first lubricating groove is arranged along the axial direction of the first bearing part and is of a linear structure, and compared with the scheme of inclined arrangement, the first lubricating groove is low in processing difficulty and short in length, so that the first lubricating groove is convenient to machine and form, the processing technology is simplified, and the production cost is reduced.

According to an embodiment of the present application, the first lubrication flow path further comprises: and the first flow through groove is arranged on the cavity wall of the accommodating cavity and is arranged along the circumferential direction of the first bearing part.

The first flow through groove is formed in the wall of the accommodating cavity, which is equivalent to further increase of the capacity of the accommodating cavity, so that the quantity of the lubricating medium in the accommodating cavity is further increased, and a better lubricating effect is provided. Simultaneously, because first circulation groove sets up along the circumference of first bearing portion and is the loop configuration, can play ascending drainage effect in week to the lubricated medium that holds the intracavity for the lubricated medium that holds the intracavity can encircle first bearing portion along first circulation groove fast, improves the homogeneity of lubricated membrane in week, further improves the lubricated effect to first bearing portion.

According to an embodiment of the present application, the first circulation groove communicates with the first lubrication groove, one end of the first throttling groove communicates with the first circulation groove, and the other end of the first throttling groove communicates with the input port.

Because the first circulation groove is communicated with the first lubricating groove, and two ends of the first throttling groove are respectively communicated with the first circulation groove and the input port, oil of the output port flows into the accommodating cavity through the throttling hole, flows along the axial direction of the first lubricating groove and flows to the first circulation groove, flows along the circumferential direction of the first circulation groove and flows to the first throttling groove, and then flows to the input port through the first throttling groove. Therefore, the first lubricating flow path plays a good role in guiding the lubricating medium, and the circulation of the lubricating medium is effectively improved, so that the lubricating effect is improved; meanwhile, the positions and the shapes of the throttling hole and the first throttling groove can be conveniently and reasonably arranged according to needs, the processing difficulty is reduced, and the structure and the performance of a product are optimized.

According to an embodiment of the present application, the first circulation groove is provided at an open end of the accommodation chamber, and the first throttle groove is provided on an end surface of the open end of the first bearing portion.

Establish first circulation groove at the open end department that holds the chamber, then the one end in first lubrication groove also extends to the open end department that holds the chamber to guarantee with the intercommunication in first circulation groove, be favorable to prolonging the length in first lubrication groove like this, thereby further improve lubricated effect. Accordingly, the first throttling groove is provided on the end surface of the open end of the first bearing portion, facilitating communication between the first circulation groove and the first throttling groove. Simultaneously, the space that holds the opening end department in chamber is great relatively, compares in the scheme of the inside trompil at first bearing portion, is showing the processing degree of difficulty that has reduced first circulation groove and first throttle groove, the machine-shaping of being convenient for.

According to an embodiment of the application, the open end of the accommodating cavity is provided with a chamfer which is concave towards the direction far away from the central axis of the accommodating cavity to form the first flowing through groove.

Form first class through the mode of establishing the chamfer at the opening end department who holds the chamber and lead to the groove for the processing that first class led to the groove is more convenient, easily machine-shaping more. Meanwhile, the chamfer is sunken towards the direction far away from the central axis of the accommodating cavity, so that the chamfer is ensured to form an annular groove, and a channel for flowing of a lubricating medium is provided. In addition, the chamfer form has no edge structure, so that the lubricating medium is favorably prevented from accumulating in the first flow through groove, and the flowability of the lubricating medium is improved.

According to an embodiment of the application, the first throttle groove is arranged in a radial direction of the first bearing portion.

The first throttling groove is arranged along the radial direction of the first bearing part and is of a linear structure, and compared with the scheme that the first throttling groove is obliquely arranged and is arranged in a curve shape, the first throttling groove is low in processing difficulty and short in length, so that the processing and forming are facilitated, the processing technology is simplified, and the production cost is reduced. Of course, the first lubrication groove may also take the form of a non-linear shape.

According to an embodiment of the application, the minimum radial distance L1 between the first lubrication groove and the outlet opening is smaller than the minimum radial distance L2 between the first lubrication groove and the inlet opening.

The minimum radial distance L1 between the first lubrication groove and the delivery outlet refers to the minimum distance between the edge of the first lubrication groove and the edge of the delivery outlet in the radial direction of the first bearing portion. The minimum radial distance L2 between the first lubrication groove and the input port refers to the minimum distance between the edge of the first lubrication groove and the edge of the input port in the radial direction of the first bearing portion. When L1 is less than L2, it indicates that the first lubrication groove is closer to the output port and farther from the input port. In other words, the first lubrication groove is provided on the side near the output port, i.e., on the high-pressure side of the pump cover. In the rotating process of the rotating shaft, the rotating shaft is affected by the pressure of liquid in the pump cover and can relatively deviate from the low-pressure side of the pump cover, so that the part of the first bearing part, which is close to the input port, is a main pressure bearing area. Therefore, the first lubrication groove is arranged on the high-pressure side of the pump cover, the pressure bearing area of the first bearing portion can be avoided, the influence on the rigidity of the first bearing portion is small, and the use reliability of the first bearing portion is improved. In addition, the pressure difference between the first lubricating groove and the input port is utilized to improve the flowing effect of the lubricating medium in the accommodating cavity, so that the lubricating effect is further improved.

According to an embodiment of the present application, the first bearing portion includes: the supporting part is provided with a first bearing hole in an enclosing manner, and the first bearing hole is used for being in clearance fit with the rotating shaft; the storage part is connected with one end of the supporting part and encloses a storage pool communicated with the first bearing hole, and the first bearing hole and the storage pool form at least one part of the accommodating cavity.

The first bearing portion includes a support portion and a storage portion. The supporting part is surrounded with a first bearing hole which is in clearance fit with the rotating shaft, so that the function of the first bearing part as a sliding bearing is realized. The storage part is connected with one end of the supporting part and encloses a storage pool, one end of the first bearing part is sealed, and the containing cavity is made to form a blind hole structure. Simultaneously, the setting of reservoir has prolonged the axial length of first bearing portion in other words to further improve the volume of holding the lubricated medium of intracavity, be favorable to further improving lubricated effect. And the lubricating medium stored in the storage tank has certain pressure, can play a role of reverse bearing on the end surface of the rotating shaft, is favorable for avoiding frictional wear between the end surface of the rotating shaft and the first bearing part, and also indirectly plays a role of reverse thrust on the pump gear connected with the rotating shaft, thereby being favorable for reducing the frictional wear between the end surface of the pump gear and the pump cover.

According to an embodiment of the application, the cross-sectional area of the first bearing hole is smaller than the cross-sectional area of the reservoir.

The cross-sectional area of the first bearing hole (area of the cross-section along the axis perpendicular to the first bearing portion) is smaller than the cross-sectional area of the reservoir (area of the cross-section along the axis perpendicular to the first bearing portion), that is: the first bearing hole is relatively thin, and the storage pool is relatively thick, so that the amount of a lubricating medium in the storage pool can be further increased, the lubricating effect can be further improved, the pressure of the storage pool can be improved, and the reverse bearing effect on the rotating shaft and the pump gear can be further improved.

According to an embodiment of the present application, one end of the orifice communicates with the output port, and the other end of the orifice communicates with the reservoir.

Since the rotation shaft is not inserted into the storage tank, a space in the storage tank is relatively large. When the both ends of orifice communicate delivery outlet and reservoir respectively, the pressure differential between reservoir and the delivery outlet is great relatively, therefore the lubricated medium of the delivery outlet department of being convenient for flows into fast through the orifice and holds the chamber, is favorable to improving the flow velocity of lubricated medium to improve lubricated effect.

According to one embodiment of the application, the central axis of the orifice is rectilinear.

The central axis of the throttle hole is a straight line, and the throttle hole is a straight through hole and directly penetrates through the inner wall surface and the outer wall surface of the first bearing part, so that compared with a curved through hole, the throttle hole is simpler in structure and convenient to machine and mold.

According to an embodiment of the present application, the first lubrication groove of the first lubrication flow path is provided on the bore wall of the first bearing bore and extends to both ends of the first bearing bore.

Establish first lubrication groove on the pore wall of first bearing hole, and first lubrication groove extends to the both ends in first shaft hole, has both guaranteed the intercommunication of first lubrication groove and reservoir to guaranteed that the lubricated medium in the reservoir can flow to first lubrication groove, also guaranteed that the lubricated medium in the first lubrication groove can form even lubricant film between the pore wall of pivot and first bearing hole, thereby guarantee good lubrication.

According to an embodiment of the present application, let us say that the cross-sectional area of the throttle hole is S1, and the smaller of the cross-sectional area of the first throttle groove and the cross-sectional area of the first flow through groove is S2; wherein S2 is not less than S1 is not less than 10 multiplied by S2; or S1 is not less than S2 is not less than 10 multiplied by S1.

Through the cross-sectional area (the area of the cross-section along the flow direction of perpendicular to lubricated medium) of reasonable control each part of first lubricated flow path, can the hydraulic pressure in the reasonable control reservoir, and then play good reverse bearing effect to countershaft and pump gear, also guarantee to provide reasonable lubricated medium volume for first bearing portion simultaneously to can not lead to the lubricated medium volume of delivery outlet too to reduce and influence the efficiency of pump unit.

According to an embodiment of the present application, the central axis of the input port is arranged in the axial direction of the first bearing portion; the center axis of the outlet port is arranged in the axial direction or the radial direction of the first bearing portion.

The central axis of the input port is arranged along the axial direction of the first bearing part, namely, the central axis of the input port is parallel to the central axis of the first bearing part, the structure is simple, and the processing and forming are convenient. The central axis of the output port is arranged along the axial direction or the radial direction of the first bearing part, namely, the central axis of the output port is kept parallel or vertical to the central axis of the first bearing part, the structure is simpler, and the processing and the forming are convenient. So, pump unit has two kinds of flow paths, and the axial is gone into, axial play, perhaps goes into, radial play axially, and concrete setting mode can be according to product demand rational design.

According to an embodiment of the second aspect of the present application, there is provided a pump apparatus including: a pump cap of the pump apparatus according to any one of the embodiments of the first aspect; one end of the shell is connected with the pump cover, a pump cavity and a motor cavity are arranged in the shell, and the pump cavity is communicated with an input port and an output port of the pump cover; one end of the rotating shaft is inserted into the accommodating cavity of the pump cover and is in clearance fit with the first bearing part of the pump cover.

The pump device provided by the embodiment of the second aspect of the present application includes the pump cover of any one of the embodiments of the first aspect, so that all the advantages of any one of the embodiments are achieved, and details are not repeated herein.

According to an embodiment of the present application, the casing includes a second bearing portion, the second bearing portion is disposed in the pump chamber, the second bearing portion defines a second bearing hole, and the rotating shaft passes through the second bearing hole and is in clearance fit with the second bearing hole.

The second bearing part is a part of the shell and is used as a sliding bearing for supporting the rotating shaft and improving the position stability of the rotating shaft. Therefore, the first bearing part and the second bearing part form two sliding bearings which support the rotating shaft, and the rolling bearing can be omitted, so that the structure of the pump device is simplified, and the production cost of the pump device is reduced.

According to an embodiment of the application, the pump chamber comprises a first pressure chamber communicating with the input port and a second pressure chamber communicating with the output port, the pump device further comprising: the oil seal is arranged between the pump cavity and the motor chamber, is positioned on one side of the second bearing part close to the motor chamber and is used for separating the pump cavity from the motor chamber; and the second lubrication flow path is communicated with the first pressure cavity and the second bearing hole and communicated with the second bearing hole and the second pressure cavity and used for providing a lubrication medium for the second bearing hole to lubricate the second bearing part.

The second bearing part is lubricated by the second lubricating flow path, so that a lubricating film can be formed between the second bearing part and the rotating shaft, the friction and the abrasion between the second bearing part and the rotating shaft are effectively reduced, the reduction of the energy consumption of a product is facilitated, and the service life of the product is also facilitated to be prolonged.

According to an embodiment of the present application, the second lubrication flow path includes: one end of the second throttling groove is communicated with the second pressure cavity; a second lubrication groove provided on an inner wall surface of the second bearing hole, one end of the second lubrication groove being communicated with the other end of the second throttle groove; a second circulation groove which is arranged along the circumferential direction of the second bearing hole and is communicated with the other end of the second lubrication groove; and one end of the pressure relief hole is communicated with the second circulation groove, and the other end of the pressure relief hole is communicated with the first pressure cavity.

The second lubrication flow path includes a second throttle groove, a second lubrication groove, a second circulation groove, and a relief hole. The two ends of the second throttling groove are respectively communicated with the second pressure cavity and the second lubricating groove, the two ends of the second lubricating groove are respectively communicated with the second throttling groove and the second circulation groove, and the two ends of the pressure relief hole are respectively communicated with the second circulation groove and the first pressure cavity. The second lubricating groove is internally provided with a continuous lubricating medium, so that the second bearing part can be well lubricated.

According to an embodiment of the present application, the second throttle groove is provided on an end surface of the second bearing portion away from the oil seal; the pressure relief hole is arranged on the second bearing part.

The second throttle groove and the pressure relief hole are both arranged on the second bearing part, and can be directly arranged in a mode of slotting and perforating on the second bearing part, so that the structure is simpler, and the additional sealing is not needed. Meanwhile, the end face, far away from the oil seal, of the second bearing part directly faces the pump cavity, so that the second throttling groove is formed in the end face, and compared with the second throttling groove formed in the second bearing part, the structure of the second throttling groove is favorably simplified, and the machining difficulty is reduced.

According to an embodiment of the present application, the oil seal has a clearance with the second bearing portion, the clearance forming at least a part of the second flow channel; and/or one end of the oil seal facing the second bearing part is provided with a flow passage, and the flow passage forms at least one part of the second flow through groove.

At least one part of the second circulation groove is formed by utilizing the clearance between the oil seal and the second bearing part, so that the second bearing part can be prevented from being grooved, the structure of the second bearing part is simplified, and the processing and the forming are convenient; and the flow area of the second circulation groove is increased, the flowing effect of a lubricating medium in the second lubricating flow path is improved, the lubricating effect is improved, the pressure on the oil seal is reduced, and the risk of failure of the oil seal is reduced.

At least one part of the second circulation groove is formed by the flow passage on the oil seal, and the second bearing part can be prevented from being grooved, so that the structure of the second bearing part is simplified, and the processing and the forming are convenient; and the flow area of the second circulation groove is increased, the flowing effect of a lubricating medium in the second lubricating flow path is improved, the lubricating effect is improved, the pressure on the oil seal is reduced, and the risk of failure of the oil seal is reduced.

According to an embodiment of the application, a pressure relief cavity is provided on an end surface of the second bearing portion facing the oil seal.

The pressure relief cavity is formed in the end face, facing the oil seal, of the second bearing part, so that on one hand, the pressure on the oil seal can be further reduced, and the risk of failure of the oil seal is further reduced; on the other hand, in the rotating process of the rotating shaft, the pressure relief cavity is arranged, so that the second bearing part can be flexibly deformed to a certain extent, the rotating shaft is flexibly supported to a certain extent, and the friction and the abrasion between the rotating shaft and the second bearing part can be reduced.

According to an embodiment of the third aspect of the present application, there is provided a vehicle including: a vehicle body; and a pump device as in any one of the embodiments of the second aspect, the pump device being connected to the vehicle body.

The vehicle provided by the third aspect of the present application includes the pump device according to any one of the embodiments of the second aspect, so that all the advantages of any one of the embodiments described above are achieved, and details are not repeated herein.

Additional aspects and advantages of the present application will be set forth in part in the description which follows, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic top view of a pump cap according to one embodiment of the present application;

FIG. 2 is a schematic view of the pump cap of FIG. 1 taken along the direction A-A;

FIG. 3 is a schematic illustration in partial cross-sectional view of a pump apparatus provided in accordance with an embodiment of the present application;

FIG. 4 is a schematic illustration in partial cross-sectional view of a pump apparatus provided in accordance with an embodiment of the present application;

FIG. 5 is a schematic illustration of a partially exploded view of a pump assembly according to one embodiment of the present application;

FIG. 6 is a schematic illustration in partial cross-sectional view of a pump apparatus provided in accordance with an embodiment of the present application;

FIG. 7 is a schematic illustration of a partially exploded view of a pump assembly according to one embodiment of the present application;

fig. 8 is a schematic perspective view of a plug spring according to an embodiment of the present application;

FIG. 9 is a schematic block diagram of a vehicle provided by one embodiment of the present application;

FIG. 10 is a schematic structural diagram of a vehicle according to an embodiment of the present application.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 10 is:

1, a cover body, 11 input ports and 12 output ports;

2 first bearing part, 21 support part, 211 first bearing hole, 22 storage part, 221 storage pool, 23 containing cavity;

3 a first lubrication flow path, 31 an orifice, 32 a first throttle groove, 33 a first lubrication groove, 34 a first flow groove;

4 machine shell, 41 pump chamber, 411 first pressure chamber, 412 second pressure chamber, 42 motor chamber, 43 second bearing part, 431 second bearing hole, 432 pressure relief chamber, 44 gap, 45 fastener;

5, rotating a shaft;

6 oil seal, 61 flow channel;

7 second lubrication flow path, 71 second throttling groove, 72 second lubrication groove, 73 second flow groove, 74 relief hole;

81 rotor assembly, 82 stator assembly, 83 motor terminal, 84 circuit board, 841 first welding hole, 842 second welding hole, 843 welding hole, 844 inserting spring, 8441 welding disc, 8442 spring sheet, 8443 inserting hole, 85 fixing plate, 851 buckle, 852 first buckle, 853 second buckle, 854 avoiding notch, 86 end cover, 861 assembling hole, 87 connector, 871 inserting pin, 872 sleeve, 88 internal gear and 89 external gear;

100 pump cover, 200 pump unit, 300 vehicle, 302 vehicle body, 304 driving part, 306 oil storage.

Wherein the arrows in fig. 2 indicate the flow direction of the lubricating medium.

Detailed Description

In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

Pump covers, pump devices, and vehicles provided by some embodiments of the present application are described below with reference to fig. 1 through 10.

As shown in fig. 1, an embodiment of the first aspect of the present application provides a pump cover 100 of a pump apparatus 200, including: a cap body 1, a first bearing portion 2, and a first lubrication flow path 3.

Specifically, the cap body 1 is provided with an input port 11 and an output port 12, as shown in fig. 1 and 2. The first bearing portion 2 is connected to the cap body 1. The first bearing portion 2 encloses an accommodating cavity 23 with an open end, and the first bearing portion 2 is used for being in clearance fit with the rotating shaft 5 of the pump device 200. The first lubrication flow path 3 communicates the housing chamber 23 with the input port 11, and communicates the housing chamber 23 with the output port 12 for supplying the housing chamber 23 with a lubrication medium to lubricate the first bearing portion 2.

The pump cover 100 of the pump device 200 provided in the embodiment of the first aspect of the present application utilizes the first bearing portion 2 as a sliding bearing to support the rotating shaft 5 of the pump device 200, and the accommodating cavity 23 in the first bearing portion 2 is in the form of a blind hole, so that one end of the rotating shaft 5 inserted into the pump cover 100 can be sealed, thereby preventing the lubricating medium (specifically, but not limited to, engine oil, water-based liquid, mineral oil, vegetable oil, etc.) from flowing out along the rotating shaft 5 to cause leakage, and further improving the efficiency of the pump. Meanwhile, the first bearing part 2 is lubricated by the first lubricating flow path 3, so that a lubricating film can be formed between the first bearing part 2 and the rotating shaft 5, the friction and the wear between the first bearing part 2 and the rotating shaft 5 are effectively reduced, the reduction of the energy consumption of a product is facilitated, and the service life of the product is prolonged.

Specifically, the pump cover 100 includes a cover body 1, a first bearing portion 2, and a first lubrication flow path 3. The cover body 1 is provided with an input port 11 and an output port 12, the input port 11 has relatively low pressure for sucking the lubricating medium and allowing the lubricating medium to enter the pump device 200, and the output port 12 has relatively high pressure for pumping the lubricating medium and allowing the lubricating medium to flow out of the pump device 200. The first bearing portion 2 is connected to the cover body 1, is a part of the pump cover 100, and serves as a sliding bearing that supports the rotation shaft 5 to improve the positional stability of the rotation shaft 5.

Meanwhile, the arrangement of the first bearing part 2 enables the rotating shaft 5 to be directly inserted into the pump cover 100, so that the function of the positioning pin is achieved, the pump cover 100 is limited, and the pump cover 100 is prevented from deviating left and right in the working process of the pump device 200, so that the positioning pin additionally arranged can be omitted, the structure of the pump cover 100 is simplified, and the connecting structure of the pump cover 100 and other parts (such as the casing 4) is also simplified.

And, the first lubrication flow path 3 connects the accommodating chamber 23 and the input port 11, and also connects the accommodating chamber 23 and the output port 12, because the pressure of the output port 12 is relatively high, and the pressure of the input port 11 is relatively low, under the action of the pressure difference, part of the lubrication medium of the output port 12 will actively enter the accommodating chamber 23 through the first lubrication flow path 3, then flow to the input port 11 through the first lubrication flow path 3, then flow in the pump along with the lubrication medium of the input port 11, and finally flow to the output port 12, forming a flow path circulation. In the process of rotating the rotating shaft 5, the lubricating medium in the accommodating cavity 23 forms a lubricating film between the rotating shaft 5 and the first bearing part 2 to lubricate the first bearing part 2, so that the friction and the wear between the rotating shaft 5 and the first bearing part 2 are reduced, the energy consumption of the pump is reduced, and the service life of the pump is prolonged. In addition, the first lubrication flow path 3 realizes the circulation flow of the lubrication medium by using the pressure difference, so that the active lubrication of the first bearing part 2 is realized, and the lubrication effect is good.

In one embodiment of the present application, as shown in fig. 1 and 2, the first lubrication flow path 3 includes: an orifice 31 and a first orifice groove 32. Wherein, the orifice 31 is provided on the first bearing portion 2 and communicates the output port 12 with the accommodation chamber 23. The first throttle groove 32 is provided in the first bearing portion 2 and communicates the accommodating chamber 23 with the input port 11.

The first lubrication flow path 3 includes an orifice 31 and a first orifice groove 32. The orifice 31 is arranged on the first bearing part 2 and is connected with the output port 12 and the accommodating cavity 23, so that the lubricating medium at the output port 12 can enter the accommodating cavity 23 through the orifice 31, and the output port 12 is communicated with the accommodating cavity 23. The first throttling groove 32 is formed in the first bearing portion 2 and communicates the accommodating chamber 23 with the input port 11, so that the lubricating medium in the accommodating chamber 23 can flow to the input port 11 through the first throttling groove 32, and the communication between the accommodating chamber 23 and the input port 11 is realized.

Meanwhile, the throttle hole 31 and the first throttle groove 32 play a role in throttling and depressurizing, which is beneficial to the smooth flowing of the lubricating medium at the output port 12 into the accommodating cavity 23 through the throttle hole 31 and the smooth flowing of the lubricating medium in the accommodating cavity 23 to the input port 11 through the first throttle groove 32, thereby being beneficial to improving the fluidity of the lubricating medium in the first lubricating flow path 3 and further improving the lubricating effect.

In addition, the throttle hole 31 and the first throttle groove 32 are both arranged on the first bearing part 2, and can be directly arranged in a mode of slotting and opening holes on the first bearing part 2, so that the structure is simple, and additional sealing is not needed.

In an embodiment of the present application, further, as shown in fig. 1 and 2, the first lubrication flow path 3 further includes: a first lubrication groove 33. The first lubrication groove 33 is provided on the cavity wall of the accommodation chamber 23 and extends toward both ends of the accommodation chamber 23.

The first lubrication groove 33 is formed in the cavity wall of the accommodating cavity 23, which is equivalent to increase of the capacity of the accommodating cavity 23, so that the quantity of the lubrication medium in the accommodating cavity 23 is increased, and the continuous lubrication medium in the first lubrication groove 33 can play a good lubrication role on the first bearing part 2, so that the lubrication effect is improved.

Simultaneously, because first lubrication groove 33 extends to the both ends that hold chamber 23, can play the ascending drainage effect of axial to the lubricated medium that holds in the chamber 23 for the lubricated medium that holds in the chamber 23 can extend to the axial both ends that hold chamber 23 along first lubrication groove 33 fast, thereby the axial length of extension lubricated membrane improves lubricated membrane in the axial homogeneity, further improves the lubricated effect to first bearing portion 2.

In a specific example of the present application, the first lubrication groove 33 is provided in the axial direction of the first bearing portion 2, as shown in fig. 2.

The first lubrication groove 33 is arranged along the axial direction of the first bearing portion 2, is in a linear structure, and compared with a scheme that the first lubrication groove is arranged obliquely, the machining difficulty is low, and the length is short, so that the machining and forming are facilitated, the machining process is simplified, and the production cost is reduced.

Of course, the first lubrication groove 33 may also take the form of a non-linear shape, which is also advantageous for improving the lubrication effect.

In an embodiment of the present application, further, as shown in fig. 1 and 2, the first lubrication flow path 3 further includes: a first circulation slot 34. The first flow through groove 34 is provided on the cavity wall of the housing cavity 23 and is provided along the circumferential direction of the first bearing portion 2.

The first flow through groove 34 is formed in the wall of the accommodating cavity 23, which is equivalent to further increasing the capacity of the accommodating cavity 23, thereby being beneficial to further increasing the amount of the lubricating medium in the accommodating cavity 23, and further providing better lubricating effect. Simultaneously, because first circulation groove 34 is the loop configuration along the circumference setting of first bearing portion 2, can play ascending drainage effect in circumference to the lubricated medium that holds in the chamber 23 for the lubricated medium that holds in the chamber 23 can encircle first bearing portion 2 along first circulation groove 34 fast, improves lubricated membrane at ascending homogeneity in circumference, further improves the lubricated effect to first bearing portion 2.

Further, as shown in fig. 2, the first circulation groove 34 communicates with the first lubrication groove 33. One end of the first throttle groove 32 communicates with the first circulation groove 34, and the other end of the first throttle groove 32 communicates with the input port 11.

Since the first communicating groove 34 is communicated with the first lubricating groove 33, and both ends of the first throttling groove 32 are respectively communicated with the first communicating groove 34 and the input port 11, the lubricating medium of the output port 12 enters the accommodating chamber 23 through the throttling hole 31, flows along the first lubricating groove 33 axially and flows to the first communicating groove 34, flows along the first communicating groove 34 circumferentially and flows to the first throttling groove 32, and then flows to the input port 11 through the first throttling groove 32. Therefore, the first lubricating flow path 3 has a good drainage effect on the lubricating medium, and the circulation of the lubricating medium is effectively improved, so that the lubricating effect is improved; meanwhile, the positions and the shapes of the throttling hole 31 and the first throttling groove 32 are conveniently and reasonably arranged according to needs, the processing difficulty is reduced, and the structure and the performance of a product are optimized.

In one specific example of the present application, as shown in fig. 2, the first flow through groove 34 is provided at the open end of the accommodation chamber 23. The first throttle groove 32 is provided on an end surface of the open end of the first bearing portion 2.

Establish first circulation groove 34 at the open end department that holds chamber 23, then the one end of first lubrication groove 33 also extends to the open end department that holds chamber 23 to guarantee with the intercommunication of first circulation groove 34, be favorable to like this the length of extension first lubrication groove 33, thereby further improve lubricated effect.

Accordingly, providing the first throttle groove 32 on the end surface of the open end of the first bearing portion 2 facilitates communication of the first circulation groove 34 with the first throttle groove 32.

Meanwhile, the space at the opening end of the accommodating cavity 23 is relatively large, and compared with the scheme of opening the hole in the first bearing part 2, the processing difficulty of the first circulation groove 34 and the first throttling groove 32 is remarkably reduced, and the processing and forming are facilitated.

Specifically, the open end of the accommodation chamber 23 is provided with a chamfer as shown in fig. 2. The chamfer is recessed away from the central axis of the receiving cavity 23 forming a first flow channel 34.

The first circulation groove 34 is formed by arranging a chamfer at the opening end of the accommodating cavity 23, so that the first circulation groove 34 is more convenient to machine and easier to machine and mold. Meanwhile, the chamfer is sunken towards the direction far away from the central axis of the accommodating cavity 23, so that the chamfer is ensured to form an annular groove, and a channel for flowing of a lubricating medium is provided.

In addition, the chamfered form does not have a corner structure, and therefore, it is also advantageous to prevent the lubricating medium from accumulating in the first flow through groove 34, thereby improving the fluidity of the lubricating medium.

Further, the first throttle groove 32 is provided in the radial direction of the first bearing portion 2, as shown in fig. 1 and 2.

The first throttling groove 32 is arranged along the radial direction of the first bearing part 2, is in a linear structure, and compared with the scheme of inclined arrangement and curve arrangement, the processing difficulty is low, and the length is short, so that the processing and forming are convenient, the processing technology is simplified, and the production cost is reduced.

Of course, the first lubrication groove 33 may also take the form of a non-linear shape.

In one embodiment of the present application, as shown in fig. 1, the minimum radial distance L1 between the first lubrication groove 33 and the output port 12 is less than the minimum radial distance L2 between the first lubrication groove 33 and the input port 11.

The minimum radial distance L1 between the first lubrication groove 33 and the output port 12 refers to the minimum distance between the edge of the first lubrication groove 33 and the edge of the output port 12 in the radial direction of the first bearing portion 2. The minimum radial distance L2 between the first lubrication groove 33 and the input port 11 refers to the minimum distance between the edge of the first lubrication groove 33 and the edge of the input port 11 in the radial direction of the first bearing portion 2.

When L1 is smaller than L2, it means that the first lubrication groove 33 is closer to the output port 12 and farther from the input port 11. In other words, the first lubrication groove 33 is provided on the side close to the output port 12, that is, on the high-pressure side of the pump cover 100. In the process of rotating the rotating shaft 5, under the influence of the hydraulic pressure of the lubricating medium in the pump cover 100, the rotating shaft 5 is relatively deviated to the low-pressure side of the pump cover 100, so that the part of the first bearing portion 2 close to the input port 11 is a main pressure-bearing area. Therefore, arranging the first lubrication groove 33 on the high-pressure side of the pump cover 100 can avoid the pressure receiving area of the first bearing portion 2, has less influence on the rigidity of the first bearing portion 2, and is advantageous to improve the reliability of use of the first bearing portion 2. In addition, this also facilitates an increase in the flow effect of the lubricating medium in the accommodating chamber 23 by the pressure difference between the first lubricating groove 33 and the input port 11, thereby further increasing the lubricating effect.

In one embodiment of the present application, as shown in fig. 2, the first bearing portion 2 includes: a support portion 21 and a storage portion 22. The supporting portion 21 encloses a first bearing hole 211, and the first bearing hole 211 is used for being in clearance fit with the rotating shaft 5. The storage part 22 is connected to one end of the support part 21 and encloses a storage tank 221 communicating with the first bearing hole 211. The first bearing hole 211 and the reservoir 221 form at least a part of the accommodation chamber 23.

The first bearing portion 2 includes a support portion 21 and a storage portion 22. The support portion 21 encloses a first bearing hole 211, and the first bearing hole 211 is in clearance fit with the rotating shaft 5, so that the first bearing portion 2 can function as a sliding bearing. The storage part 22 is connected with one end of the support part 21, encloses a storage pool 221, and seals one end of the first bearing part 2, so that the accommodating cavity 23 forms a blind hole structure.

Meanwhile, the arrangement of the storage tank 221 is equivalent to the extension of the axial length of the first bearing portion 2, so that the amount of the lubricating medium in the accommodating cavity 23 is further improved, and the lubricating effect is further improved.

Moreover, the lubricating medium stored in the storage tank 221 has a certain hydraulic pressure, and can play a role of reverse bearing on the end surface of the rotating shaft 5, thereby being beneficial to avoiding the friction wear between the end surface of the rotating shaft 5 and the first bearing part 2, and indirectly playing a reverse thrust on the pump gear connected with the rotating shaft 5, and further being beneficial to reducing the friction wear between the end surface of the pump gear and the pump cover 100.

Further, the cross-sectional area of the first bearing hole 211 is smaller than that of the reservoir 221, as shown in fig. 2.

The cross-sectional area of the first bearing hole 211 (the area of the cross-section along the axis perpendicular to the first bearing portion 2) is smaller than the cross-sectional area of the reservoir 221 (the area of the cross-section along the axis perpendicular to the first bearing portion 2), that is: the first bearing hole 211 is relatively thin, and the reservoir 221 is relatively thick, which is beneficial to further increasing the amount of the lubricating medium in the reservoir 221, so as to further improve the lubricating effect, and is also beneficial to improving the hydraulic pressure of the reservoir 221, thereby improving the reverse bearing effect on the rotating shaft 5 and the pump gear.

In one embodiment of the present application, further, as shown in fig. 2, one end of the orifice 31 communicates with the output port 12, and the other end of the orifice 31 communicates with the reservoir 221.

Since the rotation shaft 5 is not inserted into the reservoir 221, the space inside the reservoir 221 is relatively large. When the two ends of the orifice 31 are respectively communicated with the output port 12 and the storage tank 221, the pressure difference between the storage tank 221 and the output port 12 is relatively large, so that the lubricating medium at the output port 12 can rapidly flow into the accommodating cavity 23 through the orifice 31, the flowing speed of the lubricating medium can be increased, and the lubricating effect can be improved.

Further, the central axis of the orifice 31 is a straight line, as shown in fig. 2.

When the central axis of the orifice 31 is a straight line, the orifice 31 is a straight through hole and directly penetrates the inner wall surface and the outer wall surface of the first bearing portion 2, and the structure is simpler than that of a curved through hole, and the machining and molding are facilitated.

Depending on the position and shape of the output port 12, the central axis of the orifice 31 may be inclined with respect to the central axis of the first bearing 2 (as shown in fig. 2) or may be perpendicular to the central axis.

In one embodiment of the present application, further, as shown in fig. 2, the first lubrication groove 33 of the first lubrication flow path 3 is provided on the bore wall of the first bearing bore 211 and extends to both ends of the first bearing bore 211.

Establish first lubrication groove 33 on the pore wall of first bearing hole 211, and first lubrication groove 33 extends to the both ends in first shaft hole, has both guaranteed the intercommunication of first lubrication groove 33 with reservoir 221 to guaranteed that the lubricating medium in the reservoir 221 can flow to first lubrication groove 33, also guaranteed that the lubricating medium in the first lubrication groove 33 can form even lubricated membrane between the pore wall of pivot 5 and first bearing hole 211, thereby guarantee good lubrication.

In some embodiments of the present application, let us say that the cross-sectional area of the throttle hole 31 is S1, and the smaller of the cross-sectional area of the first throttle groove 32 and the cross-sectional area of the first flow through groove 34 is S2. Wherein S2 is not less than S1 is not less than 10 multiplied by S2; or S1 is not less than S2 is not less than 10 multiplied by S1.

By reasonably controlling the cross-sectional area (the area of the cross-section in the direction perpendicular to the flow direction of the lubricating medium) of each part of the first lubricating flow path 3, the hydraulic pressure in the reservoir 221 can be reasonably controlled, so that a good reverse bearing effect is achieved on the rotating shaft 5 and the pump gear, and at the same time, a reasonable amount of lubricating medium is ensured to be provided for the first bearing part 2, and the efficiency of the pump device 200 is not affected by too small amount of lubricating medium at the output port 12.

In one embodiment, the lubricant is oil, and the oil pressure in the reservoir 221 approximately satisfies the following relationship: p ═ P (Pout × S1)²+Pin×S2²)/(S1²+S2²). Wherein: pout denotes the pressure of the output port 12, Pin denotes the pressure of the input port 11, S1 denotes the cross-sectional area of the orifice 31, and S2 is min (the cross-sectional area of the first throttle groove 32, the cross-sectional area of the first circulation groove 34).

In the using process, when the arrangement direction of the first bearing holes 211 and the storage tank 221 is opposite to the gravity direction, P is the minimum value, S1 and S2 satisfy that S1 is not less than S2 is not less than 10 multiplied by S1, and the oil pressure of the storage tank 221 can be ensured to be appropriate.

In the using process, as shown in fig. 3, when the arrangement direction of the first bearing hole 211 and the reservoir 221 is consistent with the gravity direction, i.e. the first bearing hole 211 is above and the reservoir 221 is below, P takes the maximum value, S1 and S2 satisfy S2 is not less than S1 is not less than 10 × S2, and the oil pressure of the reservoir 221 can be ensured to be appropriate.

Taking the installation direction shown in fig. 3 as an example, it is determined from the existing data that the oil flow rate in the first lubrication groove 33 needs to be more than 2ml/s to satisfy the lubrication requirement of the first bearing portion 2. The values of S1 and S2 are adjusted, and the oil flow rate in the first lubrication groove 33 is detected, and the following results are obtained:

1) when S1 takes 1.76mm²S2 is 0.04mm²When the oil is used, 44 is taken from S1/S2, and the oil flow in the first lubricating groove is 0.17 ml/S; 2) when S1 takes 1.76mm²，S2 is 0.19mm²When the oil is used, 9.26 is taken from S1/S2, and the oil flow in the first lubricating groove is 1.65 ml/S; 3) when S1 takes 3.14mm²S2 is 0.49mm²When the oil flow rate is larger than the set value, 6.41 is taken from S1/S2, and the oil flow rate in the first lubricating groove is 3.02 ml/S; 4) when S1 takes 3.14mm²S2 is 4mm²In this case, 0.79 was used in S1/S2, and the oil flow rate in the first lubricating groove was 6.93 ml/S.

The data show that the third scheme can ensure that the oil flow in the first lubricating groove 33 is more than 2ml/s, and the oil output of the output port 12 is not influenced by overlarge flow, so that the performance of the pump is reduced.

In one embodiment of the present application, as shown in fig. 3, the center axis of the input port 11 is arranged in the axial direction of the first bearing portion 2. The center axis of the output port 12 is arranged in the axial direction or the radial direction of the first bearing portion 2.

The central axis of the input port 11 is arranged along the axial direction of the first bearing part 2, namely, the central axis of the input port is parallel to the central axis of the first bearing part 2, the structure is simple, and the processing and the forming are convenient. The central axis of the output port 12 is arranged along the axial direction or the radial direction of the first bearing part 2, namely, the central axis is kept parallel or vertical to the central axis of the first bearing part 2, the structure is simpler, and the processing and the forming are convenient. Thus, the pump device 200 has two flow paths, i.e., axial inlet and axial outlet, or axial inlet and radial outlet, and the specific arrangement mode can be reasonably designed according to the product requirements.

An embodiment of the second aspect of the present application provides a pump apparatus 200, comprising: a pump cover 100, a casing 4, and a rotary shaft 5 of the pump apparatus 200 according to any one of the first embodiment.

Specifically, one end of the casing 4 is connected to the pump cover 100. A pump chamber 41 and a motor chamber 42 are provided in the housing 4, and the pump chamber 41 communicates with the input port 11 and the output port 12 of the pump cover 100. One end of the rotating shaft 5 is inserted into the accommodating chamber 23 of the pump cover 100 and is in clearance fit with the first bearing portion 2 of the pump cover 100.

The pump cap 100 of any one of the embodiments of the first aspect is included in the pump cap 200 of the embodiment of the second aspect, so that all the advantages of any one of the embodiments are achieved, and details are not repeated herein.

In one embodiment of the present application, further, as shown in fig. 3, the housing 4 includes a second bearing portion 43. The second bearing portion 43 is provided in the pump chamber 41. The second bearing portion 43 encloses a second bearing hole 431. The rotation shaft 5 passes through the second bearing hole 431 and is in clearance fit with the second bearing hole 431.

The second bearing portion 43 is a part of the housing 4, and serves as a slide bearing for supporting the rotary shaft 5 and improving the positional stability of the rotary shaft 5. Thus, the first bearing portion 2 and the second bearing portion 43 form two sliding bearings for supporting the rotary shaft 5, and the rolling bearings can be eliminated, thereby simplifying the structure of the pump device 200 and reducing the production cost of the pump device 200.

Meanwhile, the first bearing part 2 is a part of the pump cover 100 and can be integrally formed with the pump cover 100, and the second bearing part 43 is a part of the casing 4 and can be integrally formed with the casing 4, so that compared with the case in which two sliding bearings are separately arranged, the installation procedure of the two sliding bearings is omitted, and the structure for matching the installation of the two sliding bearings is also omitted, thereby further simplifying the structure and the installation procedure of the pump device 200, and further reducing the production cost and the assembly cost of the pump device 200.

In one embodiment of the present application, further, as shown in FIG. 3, the pump chamber 41 includes a first pressure chamber 411 and a second pressure chamber 412. The first pressure chamber 411 communicates with the input port 11, and the second pressure chamber 412 communicates with the output port 12.

The pump apparatus 200 further comprises: an oil seal 6 and a second lubrication flow path 7. The oil seal 6 is provided between the pump chamber 41 and the motor chamber 42 and on a side of the second bearing portion 43 close to the motor chamber 42 for partitioning the pump chamber 41 and the motor chamber 42. The second lubrication flow path 7 communicates the first pressure chamber 411 with the second bearing hole 431 and communicates the second bearing hole 431 with the second pressure chamber 412 for supplying a lubrication medium to the second bearing hole 431 to lubricate the second bearing portion 43.

The pump cavity 41 is used for installing a pump gear, the pump gear comprises an inner gear 88 and an outer gear 89, the inner gear 88 is sleeved on the rotating shaft 5 and is coaxially connected with the rotating shaft 5, and the outer gear 89 is sleeved on the outer side of the inner gear 88 and is eccentrically arranged relative to the inner gear 88. A first pressure chamber 411 and a second pressure chamber 412 are formed between the outer gear 89 and the inner gear 88. The first pressure chamber 411 is in communication with the input port 11, and is at a relatively low pressure, which may be referred to as a low pressure chamber. The second pressure chamber 412 communicates with the output port 12 and is at a relatively high pressure, which may be referred to as a high pressure chamber. When the pump device 200 is operated, the lubricating medium is sucked from the input port 11, enters the low-pressure chamber, and along with the rotation of the pump gear, the lubricating medium in the low-pressure chamber enters the high-pressure chamber and is discharged through the output port 12.

The motor chamber 42 is used to mount the rotor assembly 81 and the stator assembly 82, and the coils of the stator assembly 82 are connected to the circuit board 84 of the pump apparatus 200 through the motor terminals 83. The oil seal 6 is arranged between the pump cavity 41 and the motor cavity 42, the pump cavity 41 and the motor cavity 42 are separated by the oil seal 6, the lubricating medium in the pump cavity 41 can be prevented from entering the motor cavity 42, and then the rotor assembly 81, the stator assembly 82 and the circuit board 84 can be arranged in the same cavity without separately separating and sealing the circuit board 84.

Meanwhile, the second bearing part 43 is lubricated by the second lubricating flow path, so that a lubricating film can be formed between the second bearing part 43 and the rotating shaft 5, the friction and the wear between the second bearing part 43 and the rotating shaft 5 are effectively reduced, the reduction of the energy consumption of a product is facilitated, and the service life of the product is also facilitated to be prolonged.

Specifically, the second lubrication flow path 7 connects the second bearing hole 431 with the first pressure chamber 411, and also connects the second bearing hole 431 with the second pressure chamber 412, because the pressure of the second pressure chamber 412 is relatively high, and the pressure of the first pressure chamber 411 is relatively low, under the action of the pressure difference, part of the lubrication medium of the second pressure chamber 412 will actively enter the second bearing hole 431 through the second lubrication flow path 7, then flow to the first pressure chamber 411 through the second lubrication flow path 7, then flow in the pump along with the lubrication medium of the first pressure chamber 411, and finally flow to the second pressure chamber 412, forming a flow path circulation. In the process of rotating the rotating shaft 5, the lubricating medium in the second bearing hole 431 forms a lubricating film between the rotating shaft 5 and the second bearing part 43 to lubricate the second bearing part 43, so that the friction and the wear between the rotating shaft 5 and the second bearing part 43 are reduced, the energy consumption of the pump is further reduced, and the service life of the pump is prolonged. In addition, the second lubrication flow path 7 realizes the circulation flow of the lubrication medium by the pressure difference, and realizes the active lubrication of the second bearing portion 43, which has a good lubrication effect.

In a specific example of the present application, the second lubrication flow path 7 includes: a second throttle groove 71, a second lubrication groove 72, a second flow through groove 73, and a relief hole 74. One end of the second throttle groove 71 communicates with the second pressure chamber 412. The second lubrication groove 72 is provided on the inner wall surface of the second bearing hole 431, and one end of the second lubrication groove 72 communicates with the other end of the second throttle groove 71. The second circulation groove 73 is provided along the circumferential direction of the second bearing hole 431, and communicates with the other end of the second lubrication groove 72. One end of the pressure relief hole 74 communicates with the second circulation groove 73, and the other end of the pressure relief hole 74 communicates with the first pressure chamber 411.

The second lubrication flow path 7 includes a second throttle groove 71, a second lubrication groove 72, a second flow groove 73, and a relief hole 74. Two ends of the second throttling groove 71 are respectively communicated with the second pressure chamber 412 and the second lubricating groove 72, two ends of the second lubricating groove 72 are respectively communicated with the second throttling groove 71 and the second flow through groove 73, two ends of the pressure relief hole 74 are respectively communicated with the second flow through groove 73 and the first pressure chamber 411, so that the lubricating medium in the second pressure chamber 412 sequentially flows into the first pressure chamber 411 through the second throttling groove 71, the second lubricating groove 72, the second flow through groove 73 and the pressure relief hole 74, and then flows into the second pressure chamber 412 along with the lubricating medium in the first pressure chamber 411, and flow path circulation is realized. The second lubrication groove 72 is filled with a continuous lubrication medium, and can provide good lubrication for the second bearing portion 43.

Meanwhile, the second throttling groove 71 and the pressure relief hole 74 play a role in throttling and reducing pressure, which is beneficial to the smooth flowing of the lubricating medium in the second pressure chamber 412 into the accommodating chamber 23 through the second throttling groove 71 and the smooth flowing of the lubricating medium in the accommodating chamber 23 to the first pressure chamber 411 through the pressure relief hole 74, thereby being beneficial to improving the fluidity of the lubricating medium in the second lubricating flow path 7 and further improving the lubricating effect.

The second lubrication groove 72 is formed in the inner wall surface of the second bearing hole 431, which is equivalent to increase of the capacity of the second bearing hole 431, so that the amount of the lubrication medium in the second bearing hole 431 is increased, and the continuous lubrication medium in the second lubrication groove 72 can perform a good lubrication effect on the second bearing portion 43, thereby improving the lubrication effect.

Further, the second lubrication groove 72 is arranged along the axial direction of the second bearing portion 43, and is in a linear structure, so that compared with the inclined arrangement scheme, the machining difficulty is low, and the length is short, thereby facilitating the machining and forming, simplifying the machining process, and reducing the production cost. Of course, the second lubrication groove 72 may also take the form of a non-linear shape, which is also advantageous for enhancing the lubrication effect.

Meanwhile, because the second lubrication groove 72 extends towards the two ends of the second bearing hole 431, the axial drainage function can be performed on the lubrication medium in the second bearing hole 431, so that the lubrication medium in the second bearing hole 431 can quickly extend towards the two axial ends of the second bearing hole 431 along the second lubrication groove 72, the axial length of the lubrication film is prolonged, the uniformity of the lubrication film in the axial direction is improved, and the lubrication effect on the second bearing part 43 is further improved.

In addition, because the second circulation groove 73 is arranged along the circumferential direction of the second bearing portion 43 and is in an annular structure, the lubricating medium in the second bearing hole 431 can be drained in the circumferential direction, so that the lubricating medium in the second bearing hole 431 can quickly surround the second bearing portion 43 along the second circulation groove 73, the uniformity of the lubricating film in the circumferential direction is improved, and the lubricating effect on the second bearing portion 43 is further improved.

Further, as shown in fig. 3, a second throttle groove 71 is provided on an end surface of the second bearing portion 43 remote from the oil seal 6. The relief hole 74 is provided in the second bearing portion 43.

The second throttle groove 71 and the pressure relief hole 74 are both formed in the second bearing portion 43, and can be directly formed by forming a groove and a hole in the second bearing portion 43, so that the structure is simple, and additional sealing is not needed.

Meanwhile, the end face of the second bearing portion 43, which is far away from the oil seal 6, directly faces the pump chamber 41, so that the second throttling groove 71 is formed in the end face, and compared with the second throttling groove 71 formed in the second bearing portion 43, the structure of the second throttling groove 71 is simplified, and the processing difficulty is reduced.

In some specific examples, the oil seal 6 has a clearance 44 with the second bearing portion 43, as shown in fig. 3. The gap 44 forms at least a portion of the second flow channel 73.

Forming at least a part of the second circulation groove 73 by the gap 44 between the oil seal 6 and the second bearing portion 43 can avoid grooving on the second bearing portion 43, thereby simplifying the structure of the second bearing portion 43 and facilitating the processing and molding; and is favorable to increasing the flow area of second circulation groove 73, has been favorable to improving the flow effect of the interior lubricating medium of second lubrication flow path 7 to improve lubricated effect, also is favorable to reducing the pressure to oil blanket 6, thereby reduces the risk that oil blanket 6 became invalid.

In some specific examples, an end of the oil seal 6 facing the second bearing portion 43 is provided with a flow passage 61, as shown in fig. 3. The flow channel 61 forms at least a part of the second flow channel 73.

The formation of at least a part of the second flow channel 73 by the flow channel 61 on the oil seal 6 can also avoid the formation of a groove on the second bearing portion 43, thereby simplifying the structure of the second bearing portion 43 and facilitating the processing and forming; and is favorable to increasing the flow area of second circulation groove 73, has been favorable to improving the flow effect of the interior lubricating medium of second lubrication flow path 7 to improve lubricated effect, also is favorable to reducing the pressure to oil blanket 6, thereby reduces the risk that oil blanket 6 became invalid.

In an embodiment of the present application, further, a pressure relief chamber 432 is provided on an end surface of the second bearing portion 43 facing the oil seal 6, as shown in fig. 3.

The provision of the relief chamber 432 on the end face of the second bearing portion 43 facing the oil seal 6 enables, on the one hand, a further reduction in the pressure on the oil seal 6 and thus a further reduction in the risk of failure of the oil seal 6; on the other hand, in the process of rotating the rotating shaft 5, the pressure relief cavity 432 is arranged, so that the second bearing portion 43 can be flexibly deformed to a certain extent, a certain flexible supporting effect on the rotating shaft 5 is achieved, and the friction and the abrasion between the rotating shaft 5 and the second bearing portion 43 can also be reduced.

In one embodiment, further as shown in fig. 4 and 5, the pump device 200 further includes an end cap 86, a fixing plate 85, and a connector 87. The connector 87 and the motor chamber 42 are separated on both sides of the circuit board 84. The fixing plate 85 and the connector 87 are molded integrally. The housing 4, the fixing plate 85, and the end cover 86 are stacked in a direction from the pump chamber 41 to the motor chamber 42, and are fixedly connected by screws. The fixing plate 85 is provided with a fastener 851 for fixing the circuit board 84, and the fastener 851 is provided on a surface of the fixing plate 85 facing away from the end cover 86. The circuit board 84 is provided with a first soldering hole 841 and a second soldering hole 842, the first soldering hole 841 is used for connecting the motor terminal 83, and the second soldering hole 842 is used for connecting the pin 871 of the connector 87. An avoiding notch 854 is formed in the fixing plate 85, and the avoiding notch 854 corresponds to the first welding hole 841. End cap 86 is provided with a mounting hole 861 which is a clearance fit with sleeve 872 of connector 87.

During assembly, the circuit board 84 is fixed to the fixing plate 85, and at this time, the pins 871 of the connector 87 are inserted into the second welding holes 842 to weld and fix the pins 871 to the circuit board 84. The fixing plate 85 is then stacked on the end face of the housing 4 with the first soldering hole 841 of the circuit board 84 aligned with the motor terminal 83, at which time the motor terminal 83 is inserted into the first soldering hole 841, and then the motor terminal 83 is soldered to the circuit board 84 using the space provided by the relief notch 854. Then, the end cover 86 is fastened and the screws are screwed to fixedly connect the end cover 86, the fixing plate 85 and the housing 4.

Aiming at the problem that the structure of the pump device 200 with the motor and the connector 87 separated at two sides of the circuit board 84 is difficult to weld, the assembly structure realizes simple welding of the circuit board 84 and the motor terminal 83 by utilizing the position relation of the circuit board 84, the fixing plate 85, the end cover 86 and the connector 87 and the position relation of the first welding hole 841 and the avoiding notch 854, and solves the problem of difficult welding of the motor terminal 83 and the circuit board 84 in the structure of the pump device 200. Compared with the scheme that the motor terminal 83 is in interference fit with the circuit board 84 by adopting a press-fit pin in the prior art, the motor terminal 83 can adopt a conventional terminal, so that the production cost is effectively reduced; compared with the pressfit process, the welding process is mature, and the process is relatively simple, so that the assembly cost is reduced.

In another embodiment, as shown in fig. 6 and 7, the pump device 200 further comprises an end cap 86, a fixing plate 85 and a connector 87, wherein the end cap 86, the connector 87 and the fixing plate 85 are in a split structure. The connector 87 and the motor chamber 42 are separated on both sides of the circuit board 84. The fixing plate 85 and the circuit board 84 are located inside the housing 4. The fixing plate 85, the circuit board 84, and the end cover 86 are arranged in a direction from the pump chamber 41 toward the motor chamber 42. The fixing plate 85 is provided with a first catch 852 for connecting the housing 4 and a second catch 853 for fixing the circuit board 84. The end cover 86 is fixedly connected with the casing 4 through screws. The connector 87 is fixedly connected with the end cover 86 through screws. The fixing plate 85 is provided with an escape notch 854, and the circuit board 84 is provided with a welding hole 843 and a plug spring 844. The welding hole 843 is used for welding the motor terminal 83. The insertion spring 844 is used for inserting and fixing with the insertion pin 871 of the connector 87.

During assembly, the fixing plate 85 is fixed to the housing 4 by the first fastener 852, and then the circuit board 84 is fixed to the fixing plate 85 by the second fastener 853, at this time, the motor terminal 83 is just inserted into the welding hole 843 through the avoiding notch 854, and then the motor terminal 83 is welded to the circuit board 84. The connector 87 and end cap 86 are then assembled into an assembly and snapped onto the circuit board 84 such that the pins 871 of the connector 87 are inserted into the springs 844 of the circuit board 84 with the end cap 86 also aligned with the housing 4 and the end cap 86 is fixedly attached to the housing 4 with screws.

As shown in fig. 8, the inserting spring 844 is a metal sheet member, and has two pads 8441 fixed to the circuit board 84 by soldering. The inserting spring 844 is provided with an inserting hole 8443, two spring pieces 8442 are arranged below the inserting hole 8443, the inserting pin 871 is close to the spring pieces 8442 when not assembled, the inserting pin 871 penetrates through the inserting hole 8443 to be contacted with the spring pieces 8442, the spring pieces 8442 are opened, the inserting pin 871 is pressed by the original pretightening force, and the electric connection is realized. The structure is free from welding and is simple to assemble. The size of the receptacle 8443 and the distance between the spring tabs 8442 can be flexibly adjusted to accommodate a variety of pins 871 of different lengths and widths.

The assembly structure also aims at the problem that the structure of the pump device 200 with the motor and the connector 87 separated at two sides of the circuit board 84 is difficult to weld, realizes simple and convenient welding of the circuit board 84 and the motor terminal 83, and solves the problem of difficult welding of the motor terminal 83 and the circuit board 84 in the structure of the pump device 200. Compared with the scheme that a press-fit pin is adopted for the contact pins 871 of the motor terminal 83 and the connector 87 in the prior art to be in interference fit with the circuit board 84, the motor terminal 83 and the contact pins 871 of the scheme can adopt conventional terminals, so that the production cost is effectively reduced; compared with a pressfit process, the welding process is mature, the process is relatively simple, and the requirements of the inserting and pulling fixing mode of the inserting spring 844 on the press-fitting force and the positioning accuracy are low, so that the assembly cost is reduced.

As shown in fig. 9 and 10, an embodiment of the third aspect of the present application provides a vehicle 300 including: a vehicle body 302 and a pump device 200 as in any of the embodiments of the second aspect. The pump device 200 is connected to a vehicle body 302.

The vehicle 300 according to the third aspect of the present application includes the pump device 200 according to any one of the embodiments of the second aspect, so that all the advantages of any one of the embodiments described above are achieved, and therefore, the description thereof is omitted.

Specifically, the housing 4 has a connecting lug, and the vehicle body 302 has a fixing hole, and the connecting lug is fixedly connected with the fixing hole by a fastener 45. The vehicle body 302 includes a drive member 304 and an oil reservoir 306, the input port 11 communicating with the oil reservoir 306, and the output port 12 for supplying a cooling medium (e.g., oil for cooling) to the drive member 304. In other words, the lubricating medium can be used both for lubricating the two bearing parts of the pump device and as a cooling medium for the drive components of the vehicle.

It should be noted that the vehicle 300 may be a conventional fuel vehicle or a new energy vehicle. The new energy automobile comprises a pure electric automobile, a range-extended electric automobile, a hybrid electric automobile, a fuel cell electric automobile, a hydrogen engine automobile and the like. When the vehicle is a conventional fuel-powered vehicle, the drive member 304 is a fuel-powered engine. When the vehicle is a new energy vehicle, the driving part 304 is a driving motor.

It is understood that the pump device 200 need not be used in a vehicle, and may be used in other products where a pump device 200 is desired. Therefore, the mounting carrier of the pump apparatus 200 is not limited to the vehicle body 302. Also, the specific installation direction of the pump device 200 depends on the product structure. Such as: after the pump device 200 is assembled with the mounting carrier, it may be reversed from the top-bottom direction illustrated in the drawings, i.e.: the motor part 7 is arranged at the lower part, and the pump part 6 is arranged at the upper part; it can also be installed upside down, in line with the up and down direction illustrated in the drawings, i.e.: the motor section 7 is located above and the pump section 6 is located below.

In this application, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pump cover of a pump apparatus, comprising:

the cover comprises a cover body, a first cover and a second cover, wherein the cover body is provided with an input port and an output port;

the first bearing part is connected with the cover body, an accommodating cavity with an opening at one end is formed by the first bearing part in a surrounding mode, and the first bearing part is in clearance fit with a rotating shaft of the pump device;

and the first lubricating flow path is communicated with the accommodating cavity and the input port, is communicated with the accommodating cavity and the output port, and is used for providing a lubricating medium for the accommodating cavity so as to lubricate the first bearing part.

2. A pump cap for a pump device according to claim 1, wherein the first lubrication flow path includes:

the throttling hole is arranged on the first bearing part and communicated with the output port and the accommodating cavity;

and the first throttling groove is arranged on the first bearing part and communicated with the accommodating cavity and the input port.

3. A pump cap for a pump device according to claim 2, the first lubrication flow path further including:

and the first lubricating groove is arranged on the cavity wall of the accommodating cavity and extends towards two ends of the accommodating cavity.

4. A pump cap for a pump assembly according to claim 3,

the first lubrication groove is provided along an axial direction of the first bearing portion.

5. A pump cap for a pumping device according to claim 3, wherein the first lubrication flow path further includes:

and the first flow through groove is arranged on the cavity wall of the accommodating cavity and is arranged along the circumferential direction of the first bearing part.

6. A pump cap for a pump assembly according to claim 5,

the first circulation groove is communicated with the first lubricating groove, one end of the first throttling groove is communicated with the first circulation groove, and the other end of the first throttling groove is communicated with the input port.

7. A pump cap for a pump assembly according to claim 6,

the first circulation groove is provided at an open end of the accommodation chamber, and the first throttle groove is provided on an end surface of an open end of the first bearing portion.

8. A pump cap for a pump assembly according to claim 7,

the opening end department that holds the chamber is equipped with the chamfer, the chamfer is kept away from to the chamfer the direction of the central axis that holds the chamber is sunken, forms first circulation leads to the groove.

9. A pump cap for a pump assembly according to claim 7,

the first throttle groove is provided in a radial direction of the first bearing portion.

10. A pump cap for a pump device according to any one of claims 3 to 9,

a minimum radial distance L1 between the first lubrication groove and the output port is less than a minimum radial distance L2 between the first lubrication groove and the input port.

11. A pump cover for a pump apparatus according to any one of claims 2 to 9, characterized in that the first bearing portion includes:

the supporting part is provided with a first bearing hole in an enclosing manner, and the first bearing hole is in clearance fit with the rotating shaft;

the storage part is connected with one end of the supporting part and encloses a storage pool communicated with the first bearing hole, and the first bearing hole and the storage pool form at least one part of the accommodating cavity.

12. A pump cap for a pump assembly according to claim 11,

the cross-sectional area of the first bearing hole is smaller than the cross-sectional area of the reservoir.

13. A pump cap for a pump assembly according to claim 11,

one end of the throttle hole is communicated with the output port, and the other end of the throttle hole is communicated with the storage pool.

14. A pump cap for a pump assembly according to claim 13,

the central axis of the throttle hole is a straight line.

15. A pump cap for a pump assembly according to claim 11,

the first lubrication groove of the first lubrication flow path is formed in the hole wall of the first bearing hole and extends to two ends of the first bearing hole.

16. A pump cap for a pump assembly according to claim 15,

note that the cross-sectional area of the throttle hole is S1, and the smaller of the cross-sectional area of the first throttle groove and the cross-sectional area of the first flow through groove is S2; wherein the content of the first and second substances,

s2 is not less than S1 is not less than 10 multiplied by S2; or

S1≤S2≤10×S1。

17. A pump cap for a pump device according to any one of claims 1 to 9,

the central axis of the input port is arranged along the axial direction of the first bearing part;

the central axis of the output port is arranged along the axial direction or the radial direction of the first bearing part.

18. A pump apparatus, comprising:

a pump cap of the pump device of any of claims 1 to 17;

one end of the shell is connected with the pump cover, a pump cavity and a motor chamber are arranged in the shell, and the pump cavity is communicated with an input port and an output port of the pump cover;

and one end of the rotating shaft is inserted into the accommodating cavity of the pump cover and is in clearance fit with the first bearing part of the pump cover.

19. The pump apparatus of claim 18,

the casing comprises a second bearing portion, the second bearing portion is arranged in the pump cavity, a second bearing hole is formed in the second bearing portion in an enclosing mode, and the rotating shaft penetrates through the second bearing hole and is in clearance fit with the second bearing hole.

20. The pump apparatus of claim 19, wherein the pump chamber includes a first pressure chamber and a second pressure chamber, the first pressure chamber in communication with the input port and the second pressure chamber in communication with the output port, the pump apparatus further comprising:

the oil seal is arranged between the pump cavity and the motor chamber, is positioned on one side of the second bearing part close to the motor chamber and is used for separating the pump cavity from the motor chamber;

and the second lubricating flow path is communicated with the first pressure cavity and the second bearing hole and communicated with the second bearing hole and the second pressure cavity and used for providing a lubricating medium for the second bearing hole to lubricate the second bearing part.

21. The pump arrangement of claim 20, wherein the second lubrication flow path comprises:

one end of the second throttling groove is communicated with the second pressure cavity;

a second lubrication groove provided on an inner wall surface of the second bearing hole, one end of the second lubrication groove being communicated with the other end of the second throttle groove;

a second circulation groove provided along a circumferential direction of the second bearing hole and communicating with the other end of the second lubrication groove;

and one end of the pressure relief hole is communicated with the second circulation groove, and the other end of the pressure relief hole is communicated with the first pressure cavity.

22. The pump apparatus of claim 21,

the second throttling groove is formed in the end face, far away from the oil seal, of the second bearing part;

the pressure relief hole is formed in the second bearing portion.

23. The pump apparatus of claim 21,

a gap is provided between the oil seal and the second bearing portion, the gap forming at least a portion of the second flow channel; and/or

And a flow passage is arranged at one end of the oil seal facing the second bearing part, and forms at least one part of the second flow through groove.

24. The pump apparatus of claim 23,

and a pressure relief cavity is arranged on the end face, facing the oil seal, of the second bearing part.

25. A vehicle, characterized by comprising:

a vehicle body; and

a pump arrangement according to any one of claims 18 to 24, said pump arrangement being associated with said vehicle body.