CN117780631A - Oil pump device and vehicle - Google Patents

Abstract

An embodiment of the invention provides an oil pump device and a vehicle, wherein the oil pump device includes: a motor structure including a drive shaft; the pump structure comprises a pump shell and a pump rotor arranged on the pump shell; the pump housing includes: the pump comprises a pump body and a pump cover arranged at one axial end of the pump body; the pump rotor specifically comprises a first rotor structure and a second rotor structure which are meshed with each other, and the first rotor structure is connected with the driving shaft; the pump cover is provided with a cover convex part matched with the groove part, the cover convex part stretches into the groove part, and the cover convex part and the groove part form a friction pair. According to the technical scheme, the cover convex part extends into the groove part, and the friction pair is formed between the cover convex part and the groove part, so that the contact area of the cover convex part and the groove part can be increased, the radial size is larger, the whole contact area is larger, and the whole external axial size is more convenient to reduce.

Description

Oil pump device and vehicle

Technical Field

The invention relates to the technical field of pump structures, in particular to an oil pump device and a vehicle.

Background

At present, in the existing pump body, a certain supporting effect can be achieved by directly contacting the motor rotor shaft with the pump cover or the pump body, however, for a sliding bearing, in order to form a good supporting oil film, the thinner the diameter of the shaft is, the longer the required axial supporting length is, and because the motor rotor shaft is limited by the size limitation of the motor, the radial size of the motor rotor shaft is smaller, so that the length of the motor rotor shaft is increased under the condition of meeting the actual supporting effect, and the axial size of the whole pump body is overlong.

In particular, in the case of a single support with only one hole supporting the shaft, the axial length required for the friction pair is long. The existing pump body can split a long single-support friction pair into two sections, one section is placed on a pump cover, for example, a hole is formed in the pump cover, and the shaft is deep into the hole to serve as a friction pair of the second section. The axial length of the friction pair between the pump cavity and the motor can be shortened, and the axial size of the whole machine can be shortened. However, the hole of the pump cover is limited by the size of the pump cover, so that the axial length is limited, the capability of shortening the axial size of the whole machine is limited, and the pump cover is insufficient in some occasions with higher requirements on the axial size of the whole machine.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

In view of this, an embodiment of the first aspect of the present invention provides an oil pump device.

Embodiments of the second aspect of the present invention provide a vehicle.

In order to achieve the above object, an embodiment of a first aspect of the present invention provides an oil pump device including: a motor structure including a drive shaft; the pump structure comprises a pump shell and a pump rotor arranged on the pump shell; the pump housing includes: the pump comprises a pump body and a pump cover arranged at one axial end of the pump body, wherein a containing part is arranged between the pump body and the pump cover, and a pump rotor is positioned in the containing part; the pump rotor specifically comprises a first rotor structure and a second rotor structure which are meshed with each other, and the first rotor structure is connected with the driving shaft; the pump cover is provided with a cover convex part matched with the groove part, the cover convex part stretches into the groove part, and the cover convex part and the groove part form a friction pair.

The oil pump device mainly comprises a motor structure and a pump structure, wherein the motor structure comprises a driving shaft, the pump structure comprises a pump shell and a pump rotor, and the pump rotor can rotate relative to the pump shell, so that a certain pressurizing driving effect is achieved on fluid media such as lubricating oil. Specifically, the pump housing mainly includes a pump body and a pump cover that are axially disposed, and a housing portion is disposed between the pump cover and the pump body for housing the pump rotor. For the pump rotor, it includes a meshed first rotor structure and a second rotor structure. It should be emphasized that the first rotor structure and the driving shaft are in a split structure, and have a certain connection relationship, and the connection manner between the two structures includes, but is not limited to, interference fit, key fit, screw fit, spline fit, adhesive fit, etc.

It can be understood that, for the oil pump device, the driving shaft is directly in sliding fit with the pump cover, and on the basis that a small gap exists between the pump cover and the driving shaft, the lubricating oil can form an oil film, so that on the basis that no additional bearing structure is added, the effect similar to that of a sliding bearing can be achieved, the characteristics of the oil pump structure are fully utilized, and the number of the bearing structures can be reduced. However, it is necessary to add sufficient mating length and mating diameter to ensure that a well-supported thickness of oil film is formed between the two during operation of the oil pump. This application is at the distal end of first rotor structure, be provided with the slot part that extends to motor structure is sunken, still be provided with the lid convex part on the pump cover, through stretching into the slot part with the lid convex part, and form the friction pair between lid convex part and the slot part, can increase the area of contact of both, compare in the radial dimension of the contact surface between drive shaft and the pump body promptly, the radial dimension of this scheme is bigger, whole area of contact is bigger, make only need increase a part radial dimension, can play better supporting effect, thereby to the complete machine, can reduce the outside axial dimension in a very big degree, can change the outside axial dimension of complete machine through the radial dimension that increases a part pump body inside, thereby make on the basis that does not increase the radial dimension of oil pump device outside, realize reducing the effect of complete machine outside axial dimension.

In the technical scheme, the first rotor structure is provided with a first shaft hole in a through hole shape. In this solution, the drive shaft passes through a first shaft hole in the first rotor structure, and the radial position of the drive shaft is limited by the first shaft hole. It is emphasized that the axial dimension required for maintaining a certain supporting strength of the driving shaft is constant, and the external axial dimension of the whole oil pump device can be shortened by utilizing the inner space of the pump cover at one axial end, which is beneficial to the miniaturization design requirement.

In the above technical scheme, the cover groove part is arranged at one end of the pump cover far away from the motor structure. In the technical scheme, through setting up lid slot part on the pump cover, can very big lighten the weight of pump cover under the effect of lid slot part, in addition, can also play the effect such as dodging, location, support, improve the functionality of pump cover. In the above technical solution, further includes: the first bulge part is arranged at one end of the first rotor structure, which is close to the motor structure, and extends towards the direction, which is close to the motor structure; and the matching part is arranged on the storage part and is matched with the shape of the first protruding part.

In this technical scheme, through being provided with the first bellying that extends to motor structure on first rotor structure, through forming friction pair between the cooperation portion with first bellying and the pump body, can increase the area of contact of both, compare in the radial dimension of the contact surface between drive shaft and the pump body promptly, the radial dimension of this scheme is bigger, whole area of contact is bigger for only need increase a part radial dimension can play better supporting effect, thereby to the complete machine, can reduce external axial dimension to the very big degree, can change the external axial dimension of complete machine through increasing the inside radial dimension of a part pump body, thereby make on the basis of the radial dimension that does not increase oil pump device outside, realize reducing the effect of complete machine external axial dimension.

In the above technical solution, further includes: a motor housing, in which a motor cavity is formed, and a motor structure is arranged in the motor cavity; a pump cavity for accommodating a pump rotor is formed in the pump shell, and a driving shaft penetrates through the motor cavity and extends into the pump cavity.

In this technical scheme, through setting up the motor casing, through setting up motor structure in the motor intracavity to can play the effect of protection for motor structure, to the pump shell, then can play the guard action to the pump rotor that locates the pump chamber inside, reduce the influence that receives external environment, especially can realize relative sliding's rotation for the pump shell with first rotor structure integrated into one piece's drive shaft.

The cover convex part can be made into a whole with the pump cover or can be made into a split type, so that better supporting and friction effects can be realized by utilizing the characteristics of other materials.

It should be noted that the motor casing and the pump casing may be formed as an integral structure or as a separate structure.

In the above technical solution, further includes: the bearing groove is arranged on the motor cavity; the bearing is arranged in the bearing groove, and the driving shaft penetrates through the bearing.

In the technical scheme, the bearing groove and the bearing are also independently arranged, and a certain supporting effect can be achieved on the driving shaft through arranging the bearing on the driving shaft. Specifically, the motor cavity part of the casing is directly provided with a bearing groove, and after the bearing is placed in the bearing groove, the driving shaft can directly penetrate through the bearing, so that the support is realized.

Wherein the bearing grooves may be located at the ends of the motor structure. Further, it may be arranged at an end of the motor structure facing the second rotor structure, i.e. at an axially intermediate portion of the housing.

The bearing in the bearing groove can be a rolling bearing or a sliding bearing, and only needs to play a supporting role.

In the above technical solution, further includes: the oil seal groove is arranged on the motor cavity; the oil seal is arranged in the oil seal groove, and the driving shaft penetrates through the oil seal.

In the technical scheme, the oil seal groove is formed in the motor cavity, and the oil seal is arranged in the oil seal groove, so that the effect of preventing liquid medium from flowing into the motor structure is achieved.

In the above technical scheme, the radial outside of the first rotor structure is provided with a plurality of first teeth, the radial outside of the second rotor structure is provided with a plurality of second teeth, and the first rotor structure is externally meshed with the second rotor structure.

In this embodiment, the first rotor structure and the second rotor structure are driven by the engagement of the first teeth and the second teeth. Specifically, the first rotor structure is provided with external teeth, i.e. first teeth, and the second rotor structure is provided with external teeth, i.e. second teeth.

It will be appreciated that the first and second teeth are not all engaged, and during engagement, the first pair of teeth has not yet disengaged and the second pair of teeth has been engaged, the tooth face of each first tooth being in contact with the tooth face of the second tooth to form a sealed cavity, the volume of the sealed cavity varying with rotation of the first rotor structure.

Specifically, the first rotor structure is meshed with the conjugate curve tooth profile of the second rotor structure, and each tooth is contacted with each other to drive the second rotor structure to rotate in the same direction. The first rotor structure divides the interior cavity of the second rotor structure into a plurality of working cavities.

Further, the centers of the first rotor structure and the second rotor structure are not overlapped and are offset, the volumes of the working cavities change along with the rotation of the motor rotor, a certain vacuum is formed in the area with the increased volume, the oil inlet is arranged at the position, the pressure of the area with the reduced volume is increased, and the oil outlet is correspondingly arranged at the position.

In the above technical scheme, the radial outside of the first rotor structure is provided with a plurality of first teeth, the radial inside of the second rotor structure is provided with a plurality of second teeth, and the first rotor structure is internally meshed with the second rotor structure.

In this embodiment, the first rotor structure and the second rotor structure are driven by the engagement of the first teeth and the second teeth. Specifically, the first rotor structure is provided with external teeth, i.e. first teeth, and the second rotor structure is provided with internal teeth, i.e. second teeth. Through the internal engagement of the two, the pressurization of the fluid medium can be realized in the continuous rotation process of the first rotor structure.

In the above technical solution, further includes: the oil conveying channel is arranged on the pump cover, penetrates through two end faces of the pump cover, and at least part of projection of the oil conveying channel on the end faces is overlapped with projection of a gap between the second rotor structure and the first rotor structure on the end faces.

In the technical scheme, lubricating oil can be input into the cavity by arranging a through oil conveying channel on the pump cover. Specifically, the gap between the oil delivery channel and the first rotor structure and the gap between the oil delivery channel and the second rotor structure have an overlapping area in the axial direction, so that lubricating oil can flow into the first rotor structure and the second rotor structure along the oil delivery channel, fluid becomes lubricant, sliding friction generated when the first rotor structure and the second rotor structure rotate mutually can be reduced, negative influence of the sliding friction on rotation of the first rotor structure can be reduced, and overall torque efficiency is ensured.

In the above technical scheme, the casing specifically comprises a motor cavity and a pump cavity which are distributed along the axial direction, the motor structure is arranged in the motor cavity, and at least part of the first rotor structure and the second rotor structure are arranged in the pump cavity.

In this technical scheme, casing self mainly includes two cell bodies that are used for providing mounted position, namely motor chamber and pump chamber, through with the two axial distribution, more be convenient for utilize motor structure's structure to drive the pump body, also can drive first rotor structure together rotation under motor rotor's effect promptly.

It should be noted that, depending on the specific shape, part of the first rotor structure may be disposed in the pump chamber, or all of the first rotor structure may be disposed in the pump chamber.

In the above technical solution, the radial dimension of the first rotor structure is greater than the radial dimension of the driving shaft.

In this technical solution, by limiting the radial dimension of the first rotor structure, the radial dimension of the first rotor structure is limited to be larger so as to cooperate with the second rotor structure, thereby realizing the function of the oil pump.

In the above technical solution, the driving shaft is a stepped shaft or an optical axis.

In the technical scheme, the driving shaft can directly select an optical axis, so that the processing is convenient, or a stepped shaft is selected, the axial positioning can be realized according to steps, and the assembly is convenient.

In the above technical scheme, the motor structure specifically includes: the motor stator and the motor rotor are coaxially arranged, the driving shaft is connected with the motor rotor, and the motor rotor rotates to drive the driving shaft to rotate together.

In this technical scheme, motor structure mainly includes coaxial motor rotor and motor stator, and motor stator is fixed to be set up in the casing, and motor rotor then can take place to rotate for motor stator, at this moment, owing to still be equipped with integrated into one piece's drive shaft and first rotor structure, the drive shaft can directly stretch into motor rotor for motor rotor can drive first rotor structure and take place to rotate together when motor stator rotates under the motor stator effect, and then realize the cooperation with second rotor structure, thereby play certain pressurization driving effect to the fluid medium between first rotor structure and the second rotor structure, for example lubricating oil.

An embodiment of a second aspect of the present invention provides a vehicle including: a vehicle body; any one of the oil pump devices of the first aspect, provided in the vehicle body; and the transmission structure is arranged in the vehicle body and is connected with the oil pump device.

The vehicle provided by the invention comprises a vehicle body and the oil pump device arranged in the vehicle body, wherein the shell mainly plays a certain role in protecting the motor oil pump, and meanwhile, the engine is arranged in the vehicle body.

The transmission structure can be one or more of an engine, a speed reducer, a two-in-one electric drive system and a three-in-one electric drive system assembly.

The vehicle may be a special vehicle, and the vehicle has all the advantages of the oil pump device. It is worth to say that the vehicle can be a traditional 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.

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

Drawings

Fig. 1 shows a schematic structural view of an oil pump device according to an embodiment of the present invention;

fig. 2 shows a schematic structural view of an oil pump device according to an embodiment of the present invention;

fig. 3 shows a schematic structural view of an oil pump device according to an embodiment of the present invention;

fig. 4 shows a schematic structural view of an oil pump device according to an embodiment of the present invention;

fig. 5 shows a schematic structural view of an oil pump device according to an embodiment of the present invention;

fig. 6 shows a schematic structural view of an oil pump device according to an embodiment of the present invention;

FIG. 7 shows a schematic structural view of a pump cap according to one embodiment of the invention;

FIG. 8 shows a schematic structural view of a first rotor structure and a second rotor structure according to an embodiment of the present invention;

fig. 9 shows a schematic structural view of a vehicle according to an embodiment of the present invention.

The correspondence between the reference numerals and the component names in fig. 1 to 9 is:

100: an oil pump device; 102: a housing; 1024: a motor cavity; 1026: a pump chamber; 103: a pump structure; 1032: a pump housing; 104: a pump cover; 1042: an oil delivery passage; 105: a pump body; 106: a first rotor structure; 1062: a first shaft hole; 1065: a first tooth; 107: a pump rotor; 108: a second rotor structure; 1082: a second tooth; 110: a motor structure; 1101: a drive shaft; 1102: a motor rotor; 1104: a motor stator; 112: a first boss; 114: a mating portion; 1142: a groove portion; 1144: a cover protrusion; 1146: a cover groove portion;

1182: a bearing groove; 1184: a bearing; 1192: an oil seal groove; 1194: an oil seal;

200: a vehicle; 202: a vehicle body; 204: and a transmission structure.

Detailed Description

In order that the above-recited objects, features and advantages of embodiments of the present invention can be more clearly understood, a further detailed description of embodiments of the present invention will be rendered by reference to the appended drawings and detailed description thereof. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

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

Some embodiments according to the present invention are described below with reference to fig. 1 to 9.

Example 1

As shown in fig. 1, an oil pump device 100 according to this embodiment mainly includes a motor structure 110 and a pump structure 103, where the motor structure 110 includes a driving shaft, the pump structure 103 includes a pump housing 1032 and a pump rotor 107, and the pump rotor 107 can rotate relative to the pump housing 1032, so as to exert a certain pressurized driving effect on a fluid medium, such as lubricating oil. Specifically, the pump housing 1032 mainly includes the pump body 105 and the pump cover 104 that are axially disposed, and a housing portion is disposed between the pump cover 104 and the pump body 105 for housing the pump rotor 107, it is understood that a portion of the housing portion may be located in the pump body 105, a portion may be located in the pump cover 104, or the housing portion may be disposed entirely in the pump body 105 or the pump cover 104. For the pump rotor 107, it includes a meshed first rotor structure 106 and a second rotor structure 108. It should be emphasized that the first rotor structure 106 is a separate structure with a certain connection relationship with the driving shaft, and the connection manner between the two includes, but is not limited to, interference fit, key fit, screw fit, spline fit, adhesive fit, etc.

It will be appreciated that, for the oil pump device, the driving shaft is directly slidingly matched with the pump cover 104, on the basis that a smaller gap exists between the pump cover 104 and the driving shaft, the lubricating oil can form an oil film, so that on the basis that no additional bearing structure is added, the effect similar to that of a sliding bearing can be achieved, the characteristics of the oil pump structure 103 are fully utilized, the number of bearing structures can be reduced, but the addition is needed, in order to ensure the thickness of the oil film between the two, the far end of the first rotor structure 106 is provided with a groove 1142 which extends towards the recess of the motor structure, as shown in fig. 7, the pump cover is further provided with a cover protruding portion 1144, and a friction pair is formed between the cover protruding portion 1144 and the groove 1142, so that the contact area of the cover protruding portion 1144 and the groove 1142 can be increased, that is larger than the radial dimension of the contact surface between the driving shaft and the pump body, and the whole contact area is larger, so that only a part of the radial dimension needs to be increased, and a better supporting effect can be achieved, and thus, for the axial external effect of the whole pump can be realized by greatly reducing the axial dimension by increasing the axial dimension of the whole pump.

Further, as shown in fig. 5 and 6, the cover groove 1146 is provided in the pump cover, and the weight of the pump cover is greatly reduced by the cover groove 1146. Specifically, as shown in fig. 5, the cover groove 1146 is cylindrical, and as shown in fig. 6, the cover groove 1146 is tapered.

In one embodiment, the cap slot 1146 may be utilized to advantage in avoiding other wiring or piping structures.

In one embodiment, the lid slot 1146 may be utilized to effect an assembly or production orientation.

In one embodiment, the lid slot 1146 may be utilized to provide a supporting effect.

In one version, as shown in FIG. 3, the first shaft aperture 1062 is selected as a blind bore. In another version, as shown in FIG. 4, the first shaft aperture 1062 is selected as a through-hole.

Further, by providing the motor casing 102, the motor casing 102 has a cavity, that is, the motor cavity 1024, so as to protect the motor structure, and for the pump casing, the pump rotor 107 disposed inside the pump cavity is protected, so that the influence from the external environment is reduced, and especially, the driving shaft 1101 integrally formed with the first rotor structure 106 can rotate relative to the pump casing 1032 in a sliding manner.

In a particular embodiment, the motor housing 102 and the pump housing 1032 may be formed as a unitary structure.

In another embodiment, motor housing 102 and pump housing 1032 may be formed as a separate structure.

As shown in fig. 8, for the first rotor structure 106 and the second rotor structure 108, the driving of the lubricating oil is achieved by the engagement of the first teeth 1065 and the second teeth 1082.

In one embodiment, the first rotor structure 106 is provided with external teeth, i.e., first teeth 1065, and the second rotor structure 108 is provided with internal teeth, i.e., second teeth 1082.

In another embodiment, the first rotor structure 106 is provided with external teeth, i.e., first teeth 1065, and the second rotor structure 108 is provided with external teeth, i.e., second teeth 1082.

It will be appreciated that the first teeth 1065 and the second teeth 1082 are not all engaged, and during engagement, the first pair of teeth have not yet disengaged and the second pair of teeth have been engaged, the tooth face of each first tooth 1065 will contact the tooth face of the second tooth 1082 to form a sealed volume, and as the first rotor structure 106 rotates, the volume of the sealed volume will change, if not in communication with the relief passage, to form a trapped volume. Because the compressibility of the liquid is small, when the trapped oil volume is reduced from large, the liquid in the trapped oil volume is squeezed, the pressure is increased sharply, and meanwhile, the liquid (typically lubricating oil) in the trapped oil volume is forced to be squeezed out from all the leaked gaps, so that the driving shaft 1101 and the bearing 1184 can bear large impact load, power loss is increased, the oil is heated, noise and vibration are caused, and the working stability and service life of the gear pump are reduced. When the volume of the trapped oil is changed from small to large, vacuum is formed, so that air dissolved in the liquid is separated to generate bubbles, and the damages such as cavitation, noise, vibration, flow and pressure pulsation are brought. The method for eliminating the oil trapping phenomenon adopts the method that unloading grooves are formed in two end covers of a gear, so that the unloading grooves are communicated with an oil pressing cavity when the closed volume is reduced, and the unloading grooves are communicated with an oil suction cavity when the closed volume is increased.

Specifically, the first rotor structure 106 rotates the second rotor structure 108 in the same direction by engaging the conjugate curve tooth profile of the second rotor structure 108 with each tooth in contact with each other. First rotor structure 106 divides the interior cavity of second rotor structure 108 into a plurality of working chambers.

Further, the centers of the first rotor structure 106 and the second rotor structure 108 are not coincident and are offset, the volumes of the working chambers change along with the rotation of the motor rotor 1102, a certain vacuum is formed in the area with increased volumes, the oil inlet is arranged at the position, the pressure is increased in the area with reduced volumes, and the oil outlet is correspondingly arranged at the position.

The housing 102 itself mainly includes two cavities for providing mounting positions, i.e. a motor cavity 1024 and a pump cavity 1026, which are axially distributed, so that the pump body is more conveniently driven by the motor structure, i.e. the first rotor structure 106 is driven to rotate together under the action of the motor rotor 1102.

It should be noted that depending on the specific shape, some of the first rotor structure 106 may be disposed within the pump chamber 1026, or all of the first rotor structure 106 may be disposed within the pump chamber 1026.

Further, the bearing grooves 1182 and the bearings 1184 are separately provided, and by limiting the arrangement of the bearings 1184 on the drive shaft 1101 of the first rotor structure 106, a certain supporting effect can be provided on the drive shaft 1101. Specifically, the motor cavity 1024 of the housing 102 is directly provided with a bearing slot 1182, and after the bearing 1184 is placed in the bearing slot 1182, the driving shaft 1101 of the first rotor structure 106 may directly pass through the bearing 1184, so as to realize the support.

Wherein the bearing slots 1182 may be positioned at the ends of the motor structure. Further, it may be disposed at an end of the motor structure facing the second rotor structure 108, i.e., at an axially middle portion of the casing 102.

The bearing 1184 located in the bearing groove 1182 may be a rolling bearing 1184 or a sliding bearing 1184, so long as the supporting function is ensured.

In another embodiment, the effect of preventing the flow of liquid medium into the motor structure is achieved by providing an oil seal 1192 on the motor cavity 1024 and providing an oil seal 1194 within the oil seal 1192.

In another specific embodiment, both bearing grooves and oil seal grooves are provided.

Example two

As shown in fig. 2, the oil pump device 100 according to the present embodiment mainly includes two parts, namely a motor structure 110 and a pump structure 103, wherein the motor structure 110 includes a driving shaft, the pump structure 103 includes a pump housing 1032 and a pump rotor 107, and the pump rotor 107 can rotate relative to the pump housing 1032, so as to exert a certain pressurized driving effect on a fluid medium, such as lubricating oil. Specifically, the pump housing 1032 mainly includes the pump body 105 and the pump cover 104 that are axially disposed, and a housing portion is disposed between the pump cover 104 and the pump body 105 for housing the pump rotor 107, it is understood that a portion of the housing portion may be located in the pump body 105, a portion may be located in the pump cover 104, or the housing portion may be disposed entirely in the pump body 105 or the pump cover 104. For the pump rotor 107, it includes a meshed first rotor structure 106 and a second rotor structure 108. It should be emphasized that the first rotor structure 106 is a separate structure with a certain connection relationship with the driving shaft, and the connection manner between the two includes, but is not limited to, interference fit, key fit, screw fit, spline fit, adhesive fit, etc.

It will be appreciated that, for the oil pump device, the driving shaft is directly slidingly matched with the pump cover 104, on the basis that a smaller gap exists between the pump cover 104 and the driving shaft, the lubricating oil can form an oil film, so that on the basis that no additional bearing structure is added, the effect similar to a sliding bearing can be achieved, the characteristics of the oil pump structure 103 are fully utilized, the number of bearing structures can be reduced, but the supplement is needed, in order to ensure the thickness of the oil film between the two, the oil pump device is provided with a groove part concavely extending towards the motor structure at the far end of the first rotor structure 106, the pump cover is further provided with a cover protruding part, and by extending the cover protruding part into the groove part, and forming a friction pair between the cover protruding part and the groove part, the contact area of the cover protruding part and the groove part can be increased, namely, compared with the radial dimension of the contact surface between the driving shaft and the pump body, the radial dimension of the scheme is larger, the whole contact area is larger, so that only a part of the radial dimension needs to be increased, the better supporting effect can be achieved, and the axial dimension of the whole pump device can be greatly reduced, so that the axial dimension of the whole pump body can be replaced by increasing the axial dimension of the inner part, and the outer axial dimension of the whole pump body is not be greatly increased.

It is emphasized that, this application is provided with the first bellying 112 that extends to motor structure 110 on this basis on first rotor structure 106, through forming the friction pair between first bellying 112 and the pump body 105, can increase the area of contact of both, compare in the radial dimension of the contact surface between drive shaft and the pump body 105 promptly, the radial dimension of this scheme is bigger, whole area of contact is bigger, make only need increase a part radial dimension, can play better supporting effect, thereby to the complete machine, can reduce the external axial dimension to a great extent, can change the external axial dimension of complete machine through increasing the inside radial dimension of a part pump body 105, thereby make on the basis that does not increase the radial dimension of oil pump device outside, realize reducing the effect of complete machine external axial dimension.

Further, a sleeve may be added between the first boss 112 and the pump body 105.

On the basis of any of the above embodiments, the pump body 105 is provided with the mating portion 114, the first protruding portion 112 extends into the mating portion 114, and a friction pair is formed between the first protruding portion 112 and the mating portion 114 under the mating of the two, so as to play a certain supporting effect on the first rotor structure.

In addition to any of the above embodiments, the through oil delivery passage 1042 is provided in the pump cover 104, so that the lubricant can be introduced into the pump chamber 1026 without disassembling the pump cover 104. Specifically, the gaps between the oil delivery passage 1042 and the first and second rotor structures 106 and 108 are in an overlapping region in the axial direction, so that by inputting lubricating oil to the outer end face of the pump cover 104, the lubricating oil flows into the first and second rotor structures 106 and 108 along the oil delivery passage 1042.

On the basis of any of the above embodiments, the radial dimension of the first rotor structure 106 is defined, and the radial dimension of the first rotor structure 106 is defined to be larger so as to cooperate with the second rotor structure 108, thereby achieving the function of the oil pump.

On the basis of any of the above embodiments, the driving shaft 1101 may be directly selected from an optical axis, so as to facilitate processing, or may be selected from a stepped shaft, so as to achieve axial positioning according to steps, so as to facilitate assembly.

On the basis of any of the above embodiments, the motor structure 110 mainly includes a motor rotor 1102 and a motor stator 1104 that are coaxial, the motor stator 1104 is fixedly disposed in the casing 102, the motor rotor 1102 can rotate relative to the motor stator 1104, at this time, since an integral first rotor structure 106 is further disposed in the pump chamber 1026, the driving shaft 1101 can directly extend into the motor rotor 1102, so that when the motor rotor 1102 rotates under the action of the motor stator 1104, the first rotor structure 106 is driven to rotate together, and further, the cooperation with the second rotor structure 108 is realized, thereby playing a certain role in pressurizing and driving the lubricating oil between the first rotor structure 106 and the second rotor structure 108.

Example III

As shown in fig. 9, the present embodiment provides a vehicle 200, including a vehicle body 202 and an oil pump device 100 disposed in the vehicle body 202, the housing mainly plays a certain role in protecting the oil pump device 100, and meanwhile, a transmission structure 204 is disposed in the vehicle body 202, and since the oil pump device 100 is disposed in the vehicle body 202, the beneficial effects of any one of the oil pump devices are not repeated herein.

The transmission structure 204 may be one or more of an engine, a speed reducer, a two-in-one electric drive system, and a three-in-one electric drive system assembly.

The vehicle 200 may be a special vehicle 200, and the vehicle 200 has all the advantages of the oil pump device 100. It should be noted that, the vehicle 200 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.

According to the oil pump device and the vehicle provided by the invention, the cover convex part extends into the groove part, and the friction pair is formed between the cover convex part and the groove part, so that the contact area of the cover convex part and the groove part can be increased, the radial size is larger, the whole contact area is larger, and the overall external axial size is more convenient to reduce.

In the present invention, the terms "first," "second," "third," and the like 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 defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean 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 present invention. In this specification, schematic representations of the above terms 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 is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. An oil pump device, characterized by comprising:

a motor structure comprising a drive shaft that rotates about an axis extending in an axial direction;

the pump structure comprises a pump shell and a pump rotor arranged on the pump shell, and the pump rotor is driven to rotate by the rotation of the driving shaft so as to discharge fluid medium;

the pump housing includes: the pump comprises a pump body and a pump cover arranged at one axial end of the pump body, wherein a containing part is arranged between the pump body and the pump cover, and the pump rotor is positioned in the containing part;

the pump rotor specifically comprises a first rotor structure and a second rotor structure which are meshed with each other, and the first rotor structure is connected with the driving shaft;

the pump cover is provided with a cover convex part matched with the groove part, the cover convex part stretches into the groove part, and the cover convex part and the groove part form a friction pair.

2. The oil pump apparatus according to claim 1, wherein,

the first rotor structure is provided with a first shaft hole in a through hole shape.

3. The oil pump apparatus according to claim 1, characterized by further comprising:

and the cover groove part is arranged at one end of the pump cover, which is far away from the motor structure.

4. The oil pump apparatus according to claim 1, characterized by further comprising:

the first bulge part is arranged at one end, close to the motor structure, of the first rotor structure and extends towards the direction close to the motor structure;

and the matching part is arranged on the containing part and is matched with the shape of the first protruding part.

5. The oil pump apparatus according to claim 1, characterized by further comprising:

a motor housing, wherein a motor cavity is formed in the motor housing, and the motor structure is arranged in the motor cavity;

the pump housing is formed with a pump chamber for accommodating the pump rotor, and the driving shaft penetrates through the motor chamber and extends into the pump chamber.

6. The oil pump apparatus according to claim 5, characterized by further comprising:

the bearing groove is arranged on the motor cavity;

the bearing is arranged in the bearing groove, and the driving shaft penetrates through the bearing.

7. The oil pump apparatus according to claim 5, characterized by further comprising:

the oil seal groove is arranged on the motor cavity;

the oil seal is arranged in the oil seal groove, and the driving shaft penetrates through the oil seal.

8. The oil pump apparatus of claim 1, wherein a plurality of first teeth are provided radially outward of the first rotor structure, a plurality of second teeth are provided radially outward of the second rotor structure, and the first rotor structure is externally engaged with the second rotor structure.

9. The oil pump apparatus of claim 1, wherein a radially outer side of the first rotor structure is provided with a plurality of first teeth and a radially inner side of the second rotor structure is provided with a plurality of second teeth, the first rotor structure being intermeshed with the second rotor structure.

10. The oil pump apparatus according to claim 1, characterized by further comprising:

the oil conveying channel is arranged on the pump cover, penetrates through two end faces of the pump cover, and at least part of projection of the oil conveying channel on the end faces is overlapped with projection of a gap between the second rotor structure and the first rotor structure on the end faces.

11. The oil pump apparatus according to claim 1, wherein the drive shaft is a stepped shaft or an optical axis.

12. The oil pump apparatus according to claim 1, characterized in that the motor structure specifically includes:

the motor stator and the motor rotor are coaxially arranged, the driving shaft is connected with the motor rotor, and the motor rotor rotates to drive the driving shaft to rotate together.

13. A vehicle, characterized by comprising:

a vehicle body;

the oil pump device according to any one of claims 1 to 12, provided in the vehicle body;

and the transmission structure is arranged in the vehicle body and is connected with the oil pump device.