CN114629280A

CN114629280A - Driving motor and electric system

Info

Publication number: CN114629280A
Application number: CN202011463456.3A
Authority: CN
Inventors: 杨鲁川
Original assignee: Changzhou Grand Pump Co ltd
Current assignee: Changzhou Grand Pump Co ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2022-06-14

Abstract

The invention relates to a driving motor and an electric system, wherein the driving motor comprises: a housing (11); the stator (12) is arranged in the shell (11) and is fixedly connected with the shell (11); a motor rotor (13) supported within the housing (11), and the stator (12) being disposed around the motor rotor (13); the motor rotor (13) is rotatably arranged in the housing (11), and the motor rotor (13) is axially slidably arranged in the housing (11). The invention is a rotor system without generating axial force, effectively reduces the abrasion of products, improves the reliability of the system, reduces energy consumption and improves the efficiency of the system.

Description

Driving motor and electric system

Technical Field

The invention relates to the field of machinery, in particular to a driving motor and an electric system.

Background

In the current wave of global warming reduction, automobiles are naturally forcibly managed and limited by oil consumption regulations and emission regulations of governments in various countries as an important aspect of social energy consumption and pollutant emission. Various new energy automobiles mainly comprising electric automobiles are provided with corresponding energy-saving and emission-reducing targets. In the field of new energy automobiles, the in-wheel motor is used for directly driving the vehicle, so that a transmission system of the vehicle can be greatly simplified, a transmission shaft, a differential mechanism, a transmission axle and the like are saved, and the effects of reducing cost, saving energy and reducing emission are achieved. But with the promotion of automobile market to new energy automobile performance, cost requirement, still require in-wheel motor power bigger when requiring in-wheel motor volume reduction, in the time of in-wheel motor self can become very serious like this, the heat dissipation also is difficult heavily. And the method of applying the motor pump to provide an oily cooling medium, lubrication and the like for the hub motor is widely accepted.

As a highly integrated component, reliability of the motor oil pump is certainly important for a vehicle, so that the reliability of the motor oil pump is required to be high. Meanwhile, due to the energy-saving and emission-reducing target carried by the vehicle, the energy consumption of the used motor oil pump is also very high.

In the working process of the motor oil pump, a pump gear and a shaft (most of the pump gear and the motor rotor are shared) form a rotor system by the motor rotor, and the rotor system can generate axial force when rotating at high speed and also generate axial unbalanced force generated by the deviation of the installation position between the motor rotor and the stator. It is conventional in the prior art to provide a thrust mechanism to limit the axial displacement caused by axial and unbalanced forces in order to stabilize the structure. For example, a thrust mechanism (typically a ball bearing or a thrust bearing with a thrust function) is provided at a distal end of the pump gear (the housing of the pump limits an axial end face of the pump gear), or between the pump gear and the motor rotor, at a distal end of the motor rotor. The axial forces of the rotor system will then have to act on the end faces of the pump gear, ball bearings or thrust bearings.

It follows that this way of providing an axial limit of the transmission has the following drawbacks:

1. if the end face of the pump gear is used for bearing the axial force, the pump gear is pressed to one of the front and rear housing end faces. This accelerates wear of the pump gears or housing, shortens service life, and can lead to a risk of system failure;

2. the viscous friction torque between the pump gear and the housing is abruptly increased, resulting in an abrupt increase in the power required to drive the oil pump.

Similarly, the above two points also cause the same problem when a bearing provided on one side of the motor is used to bear the axial force.

Disclosure of Invention

The invention aims to provide a driving motor and an electric system.

To achieve the above object, the present invention provides a driving motor including:

a housing;

the stator is arranged in the shell and fixedly connected with the shell;

a motor rotor supported within the housing, and the stator disposed about the motor rotor;

the motor rotor is arranged in the shell in a rotating mode, and the motor rotor is arranged in the shell in a sliding mode along the axial direction.

According to one aspect of the invention, the housing comprises: the device comprises a barrel, a rear cover and a front cover, wherein the rear cover and the front cover are arranged at two opposite ends of the barrel;

the rotating shaft of the motor rotor is rotatably and slidably connected with the rear cover and the front cover.

According to an aspect of the present invention, a sliding bearing is further provided at a position where the rotation shaft is connected to the rear cover and/or the front cover.

According to an aspect of the present invention, the rear cover is provided with a mounting groove for coupling the rotation shaft;

the depth of the mounting groove is larger than the connecting length of the rotating shaft in the mounting groove.

According to one aspect of the invention, the rotating shaft is an optical axis and is provided with a hollow channel penetrating through a body thereof along an axial direction thereof;

and an output connection structure is arranged at one end of the rotating shaft, which is far away from the rear cover.

According to one aspect of the invention, the cross-sectional profile of the output connection is of regular geometry or the cross-sectional profile of the output connection is of cut-off circle shape.

According to an aspect of the invention, further comprising: a circuit unit;

the circuit unit is arranged on the rear cover;

the motor rotor also comprises a permanent magnet fixedly connected to the rotating shaft;

the permanent magnet is arranged opposite to the stator.

To achieve the above object, the present invention provides an electric system including: the electric pump is connected with the driving motor;

the electric pump includes: a pump housing and an electric pump rotor assembly disposed in the pump housing;

the motor rotor of the driving motor is connected with the electric pump rotor assembly, and the motor rotor can be arranged in a sliding mode relative to the electric pump rotor assembly along the axial direction.

According to one aspect of the invention, the electric pump rotor assembly is provided with an input connection for connection with an output connection on a rotating shaft in the motor rotor;

the input connecting structure and the output connecting structure are arranged in a sliding connection mode, and the shapes of the input connecting structure and the output connecting structure are matched.

According to one aspect of the invention, the pump housing comprises:

a body having a receiving cavity for mounting the electric pump rotor assembly, the receiving cavity having an opening at one side of the body;

the cover body is arranged on one side of the main body, which is provided with the opening;

the side, provided with the opening, of the main body is also provided with at least one filter screen mounting groove and a filter screen mounted in the filter screen mounting groove;

the main body is also provided with a first fluid channel for inputting fluid and a second fluid channel for outputting fluid;

the first fluid channel, the filter screen mounting groove and the accommodating cavity are communicated;

the second fluid channel is communicated with the accommodating cavity;

a hollow channel on a rotating shaft in the motor rotor is communicated with the accommodating cavity;

the cover body and the front cover in the shell are integrated or separated.

According to one aspect of the present invention, an input passage for communicating the screen mounting groove and the receiving cavity is provided at a side of the cover adjacent to the main body;

and an output channel communicated with the second fluid channel is arranged at the bottom of the accommodating cavity.

According to one aspect of the invention, the first fluid channel comprises: the first fluid sub-channel is used for inputting fluid and the second fluid sub-channel is used for being communicated with the filter screen mounting groove;

the first fluid sub-channel is cross-connected with the second fluid sub-channel;

the openings of the first fluid sub-channel are arranged on the side wall of the circumferential direction of the main body.

According to one aspect of the invention, the bottom of the accommodating cavity is provided with an input fluid accommodating groove;

the input fluid accommodating groove is arranged opposite to the input channel;

an output fluid accommodating groove is formed in one side, adjacent to the main body, of the cover body;

the output fluid containing groove is arranged opposite to the output channel.

According to one aspect of the invention, along the circumferential direction of the accommodating cavity, the filter screen mounting grooves and the accommodating cavity are distributed in a plurality at intervals;

the openings of the plurality of accommodating cavities on the side surface of the main body are regular in shape; alternatively, the first and second electrodes may be,

the filter screen mounting groove and the accommodating cavity are arranged in a spaced mode in the circumferential direction of the accommodating cavity to form a single filter screen mounting groove;

the opening of the filter screen mounting groove on the side face of the main body is in a long strip shape.

According to one scheme of the invention, the rotor system does not generate axial force, so that the abrasion of a product is effectively reduced, the reliability of the system is improved, the energy consumption is reduced, and the efficiency of the system is improved.

According to one scheme of the invention, the rotor is arranged to be rotatable and slidable in the axial direction, so that the rotor is only limited in rotation and is only limited in the axial direction by the magnetic field of the motor, and is not limited mechanically, so that the rotor is not subjected to contact axial force in the rotation process, the rotation balance of the rotor is ensured, the axial wear is effectively reduced under the condition of no contact axial force, and the service life of the whole motor is effectively ensured.

According to the scheme of the invention, the rotor is rotatable and slidable along the axial direction, so that parts for limiting the axial direction can be effectively reduced, the size of the whole motor is reduced, the structure of the motor is simplified, the production cost is saved, and the operation stability is effectively improved.

According to one scheme of the invention, the mounting positions such as the mounting grooves, the through holes and the like are directly arranged on the rear cover and the front cover so as to realize the rotation and the sliding of the rotating shaft, so that the structure is simple, the stability is high and the service life is long. In addition, through setting up the degree of depth of mounting groove to be greater than the connection length of axle, eliminate the axial contact force that the axle head received in the operation, and then be beneficial for guaranteeing the steady operation of axle and eliminating the produced piece of axial wear.

According to one scheme of the invention, the sliding bearing is arranged at the connecting position of the shaft, so that the abrasion of the shaft in the rotating process is reduced, and the service life of each part is prolonged.

According to one scheme of the invention, the rotating shaft is set as the optical axis, so that the axial contact which may exist in the rotating process of the rotating shaft is effectively eliminated, and the axial contact force of the whole rotating shaft is further eliminated.

According to one scheme of the invention, the output connecting structure is set to be in a regular geometric shape or a cutting edge round shape in cross section, so that the unbalance of the output end of the shaft can be effectively eliminated under the condition of ensuring the connection with other components, and the stable operation of the structure connected on the whole rotating shaft is ensured.

According to one scheme of the invention, the rotor in the driving motor and the rotor assembly in the electric pump are connected in an axial flexible mode, namely the rotor can drive the rotor assembly to rotate for working, and meanwhile, the rotor can axially slide relative to the rotor assembly at the connecting position. Through the flexible connection mode in the axial direction, the axial limitation of the structure in the electric pump to the rotating shaft in the driving motor is further eliminated, the axial contact force in the formed system is further eliminated, the stable operation of the whole system is ensured, and the abrasion of the whole system is reduced.

According to the scheme of the invention, the installation of the filter screen structure is realized under the condition of not changing the overall size and shape of the motor pump, and the requirements of large flow and high flow rate are also ensured.

According to one scheme of the invention, the filter screen mounting groove is arranged on the main body and is arranged in a groove mode, so that the filter screen can be mounted at the side of the rotor component, and the communication of the channel for inputting fluid can be realized by arranging the connecting channel on the cover body. The mode of setting up the recess in order to realize the filter screen installation in this kind of in the main part not only the rational utilization the whole space of main part, effectively avoided changing the problem of main part shape and size, but still can not exert an influence to the position and the mode of setting up of other structures.

According to one scheme of the invention, the filter screen mounting groove is arranged beside the accommodating cavity, so that the input fluid can flow into the accommodating cavity in the shortest stroke after passing through the filter screen, the oil path between the filter screen and the accommodating cavity is shortened, and the full supply of the fluid after the filter screen is mounted is ensured. Simultaneously, through set up input channel on the lid, not only shortened the filter screen like this and held the distance between the chamber, effectively utilized the space of lid moreover.

According to the scheme of the invention, the weight of the motor pump is effectively reduced by directly arranging the channel and the mounting groove on the main body and the cover body, and the effect of light weight is realized.

According to one scheme of the invention, the installation quantity of the filter screens can be effectively increased by arranging the plurality of filter screen installation grooves on the main body, so that the fluid flow of the input channel is effectively increased, and the whole weight of the main body is effectively reduced.

According to one scheme of the invention, the filter area of the filter screen can be effectively increased by arranging the strip-shaped filter screen mounting groove on the main body, so that the filter screen is very effective in increasing the fluid flow of the input channel, and the overall weight of the main body is effectively reduced.

According to one aspect of the present invention, the first fluid sub-channel and the second fluid sub-channel are arranged to intersect, so that the fluid inputted from the first fluid sub-channel can be uniformly distributed in the second fluid sub-channel to achieve a stable fluid supply to the screen mounting groove.

According to one aspect of the invention, the provision of the inlet fluid receiving groove allows more storage space in the pump body, which is advantageous for achieving a sufficient supply of fluid in the electric motor pump.

According to one aspect of the invention, the provision of the output fluid receiving groove allows more storage space in the pump body, which is advantageous for achieving a continuous stabilization of the output of fluid.

According to one scheme of the invention, the opening of the first fluid sub-channel is arranged on the circumferential side wall of the main body, so that the pipeline installation of the pump is more convenient and flexible.

According to one scheme of the invention, the opening of the second fluid channel is also arranged on the side wall of the circumferential direction of the main body, so that the pipeline installation of the pump is more convenient and flexible.

Drawings

Fig. 1 is a perspective view schematically showing a driving motor according to an embodiment of the present invention;

fig. 2 is a block diagram schematically showing a driving motor according to an embodiment of the present invention;

FIG. 3 is a block diagram schematically illustrating an electric system in accordance with one embodiment of the present invention;

FIGS. 4-5 are exploded views schematically illustrating the construction of an electric powered system according to an embodiment of the present invention;

FIG. 6 is a cross-sectional position diagram schematically illustrating an electric powered system in accordance with an embodiment of the present invention;

FIG. 7 is a cross-sectional view schematically showing A-A in FIG. 6;

fig. 8 is a cross-sectional view schematically showing B-B in fig. 6.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can also be derived from them without inventive effort.

In describing embodiments of the present invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship that is based on the orientation or positional relationship shown in the associated drawings, which is for convenience and simplicity of description only, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, the above-described terms should not be construed as limiting the present invention.

The present invention is described in detail below with reference to the drawings and the specific embodiments, which are not repeated herein, but the embodiments of the present invention are not limited to the following embodiments.

Referring to fig. 1 and 2, according to an embodiment of the present invention, a driving motor includes: a housing 11, a stator 12 and a motor rotor 13. In the present embodiment, the housing 11 is a hollow structure, and the stator 12 and the motor rotor 13 are both disposed in the housing 11. Wherein, the stator 12 is fixedly connected with the shell 11 in the shell 11; the motor rotor 13 is supported in the housing 11, and the stator 12 is disposed around the motor rotor 13. In the present embodiment, the motor rotor 13 is rotatably provided in the housing 11, and the motor rotor 13 is slidably provided in the housing 11 in the axial direction.

Through the arrangement, the rotor is arranged to be rotatable and slidable along the axial direction, so that the rotor only has rotation limitation, only through magnetic field constraint of the motor per se in the axial direction and no mechanical constraint, the rotor cannot be subjected to contact axial force in the rotation process, further the rotation balance of the rotor is guaranteed to be more favorable, axial abrasion is effectively reduced under the condition that the contact axial force is not available, and the service life of the whole motor is effectively guaranteed.

In addition, the rotor is rotatable and can slide along the axial direction, so that parts for limiting the axial direction can be effectively reduced, the size of the whole motor is reduced, the structure of the motor is simplified, the production cost is saved, and the operation stability is effectively improved.

Referring to fig. 1 and 2, according to an embodiment of the present invention, the housing 11 includes: a cylinder 111, and a rear cover 112 and a front cover 113 mounted at opposite ends of the cylinder 111. In the present embodiment, the cylindrical body 111 is a cylindrical body having both ends open. The rear cover 112 and the front cover 113 are fixedly coupled to both ends of the cylinder 111, respectively. The rear cover 112 and the front cover 113 are coaxially provided with mounting positions for mounting the rotor, so that the rotating shaft 131 of the motor rotor 13 is rotatably and slidably connected with the rear cover 112 and the front cover 113.

In the present embodiment, the rear cover 112 is provided with a mounting groove 1121 for connecting the rotation shaft 131. The depth of the mounting recess 1121 is greater than the coupling length of the rotation shaft 131 within the mounting recess 1121. An end of the rotation shaft 131 is inserted into the mounting recess 1121 to perform rotation and axial sliding. The front cover 113 is provided with a through hole for the rotation shaft 131 to pass through, so as to realize rotation and axial sliding of the rotation shaft 131.

Through the above arrangement, the installation positions such as the installation grooves and the through holes are directly arranged on the rear cover 112 and the front cover 113 so as to realize the rotation and the sliding of the rotating shaft, and the structure is simple, the stability is high, and the service life is long. In addition, through setting up the degree of depth of mounting groove to be greater than the connection length of axle, eliminate the axial contact force that the axle head received in the operation, and then be beneficial for guaranteeing the steady operation of axle and eliminating the produced piece of axial wear.

According to another embodiment of the present invention, a sliding bearing is further provided at a position where the rotation shaft 131 is connected to the rear cover 112 and/or the front cover 113. In the present embodiment, the sliding bearing may be provided at a position where the rotation shaft 131 is connected to the rear cover 112. Or a slide bearing may be provided at a position where the rotation shaft 131 is coupled to the front cover 113. Or sliding bearings may be provided at positions where the rotation shafts 131 are coupled to the rear cover 112 and the front cover 113, respectively.

Through the setting, set up slide bearing more and be favorable to reducing the wearing and tearing of axle in rotatory in-process through the hookup location at the axle, it is beneficial to improving the life of each part.

Referring to fig. 1 and 2, according to an embodiment of the present invention, the rotating shaft 131 is an optical axis and is provided with a hollow channel 1311 penetrating through a body thereof in an axial direction thereof. In the present embodiment, an output connection structure 1312 is provided at an end of the rotary shaft 131 remote from the rear cover 112.

With the above arrangement, the rotary shaft 131 is arranged as an optical axis, which effectively eliminates the axial contact force that may exist during the rotation process, and is further beneficial to eliminate the axial contact force of the whole rotary shaft.

Referring to fig. 1 and 2, according to one embodiment of the present invention, the cross-sectional profile of output attachment 1312 is in a regular geometric shape (e.g., rectangular, square, triangular, etc.) or the cross-sectional profile of output attachment 1312 is in the shape of a trimmed circle (e.g., a circle having at least one cut edge, preferably a symmetrical pattern having a plurality of cut edges).

With the above arrangement, the output connecting structure 1312 is provided with a regular geometric shape or a cut-off circle in cross section, so that the unbalance of the output end of the shaft can be effectively eliminated while the connection with other components is ensured, which is beneficial to ensuring the stable operation of the structure connected to the whole rotating shaft.

As shown in fig. 1 and 2, according to an embodiment of the present invention, the driving motor of the present invention further includes: a circuit unit 14. In the present embodiment, the circuit unit 14 is provided on the rear cover 112. In the present embodiment, a controller is installed in the circuit unit 14, and a control program is provided in the controller. The control program controls the running state of the whole driving motor through the controller, including parameters such as rotating speed, power and the like, so as to change the working state of the electric system for adjusting the driving motor. Meanwhile, a program arranged in the controller can also communicate with the outside through an interface on the controller, receive an external instruction to adjust the working state of the driving motor, and simultaneously can feed back the state (such as fault information and the like) of the driving motor to the outside.

As shown in fig. 1 and 2, according to an embodiment of the present invention, the motor rotor 13 further includes a permanent magnet 132 fixedly coupled to the rotating shaft 131; in the present embodiment, the permanent magnet 132 is disposed opposite the stator 12.

In the present embodiment, the stator 12 includes a core and a wire wound around the core.

Referring to fig. 2, 3, 4 and 5, according to an embodiment of the present invention, an electric system of the present invention includes: a drive motor 1, and an electric pump 2 connected to the drive motor 1. In the present embodiment, the electric pump 2 includes: a pump housing 21 and an electric pump rotor assembly 22 disposed in the pump housing 21. In the present embodiment, the motor rotor 13 of the drive motor 1 is connected to the electric pump rotor assembly 22, and the motor rotor 13 is slidably disposed in the axial direction with respect to the electric pump rotor assembly 22.

Through the arrangement, the rotor in the driving motor 1 and the rotor assembly in the electric pump also adopt an axial flexible connection mode, namely the rotor can drive the rotor assembly to rotate to work, and meanwhile, the rotor can also slide axially relative to the rotor assembly at the connection position. Through the flexible connection mode in the axial direction, the axial limitation of the structure in the electric pump to the rotating shaft in the driving motor is further eliminated, the axial contact force in the formed system is further eliminated, the stable operation of the whole system is ensured, and the abrasion of the whole system is reduced.

As shown in connection with fig. 3, 4 and 5, the electric pump rotor assembly 22 is provided with an input connection structure 22a for connection with an output connection structure 1312 on the rotary shaft 131 in the motor rotor 13, according to one embodiment of the present invention. In this embodiment, the electric pump rotor assembly 22 may be configured as an internally meshing gerotor pump assembly. Specifically, the electric pump rotor assembly 22 includes a first rotor member 221 and a second rotor member 222, and the first rotor member 221 and the second rotor member 222 are arranged to mesh with each other. Wherein the input connection structure 22a provided on the first rotor member 221 is connected to the output connection structure 1312 on the rotation shaft 131. In this embodiment, the input connection 22a is slidably connected to the output connection 1312 in a form-fitting manner. In the present embodiment, the electric pump rotor assembly 22 of the present invention may be configured in the form of a trochoidal rotor type assembly, an involute gear type assembly, a vane type assembly, a plunger type assembly, a diaphragm type assembly, or the like, and the engagement form of the rotor assembly may be external engagement.

In the present embodiment, in order to ensure the connection flexibility between the rotary shaft 131 and the electric pump rotor assembly 22, an end surface 1312a of the rotary shaft 131 formed by the output connection structure 1312 is spaced from the upper surface of the electric pump rotor assembly 22.

Referring to fig. 4 and 5, according to an embodiment of the present invention, a pump housing 21 includes: a body 211 and a cover 212. In this embodiment, a receiving cavity 2111 is formed in the body 211 along the thickness direction of the body 211. The accommodation chamber 2111 has an opening at one side of the main body 211, and a groove is formed on the main body 211 extending in the thickness direction of the main body 211. In the present embodiment, the housing chamber 2111 is used for mounting the electric pump rotor assembly 22, and the arrangement thereof needs to be adapted to the structure of the electric pump rotor assembly 22.

In the present embodiment, the cover 212 is disposed at one side of the main body 211 where the opening is disposed, that is, for closing the opening of the accommodating chamber 2111, so as to realize the operation of the electric pump rotor assembly 22 in the closed space. In this embodiment, in order to connect the electric pump rotor assembly 22 with an external power source, a through hole penetrating through the body of the cover 212 is provided, so that a rotating shaft of the external power source penetrates through and is connected with the electric pump rotor assembly 22, so as to realize the operation of the electric pump rotor assembly 22.

As shown in fig. 4 and 5, according to an embodiment of the present invention, the main body 211 is further provided with at least one screen mounting groove 2112 at a side where the opening is provided, and a screen 2113 mounted in the screen mounting groove 2112. The main body 211 is further provided with a first fluid passage 2114 for inputting fluid and a second fluid passage 2115 for outputting fluid; the first fluid passage 2114, the screen mounting groove 2112 and the accommodating chamber 2111 are communicated; the second fluid passage 2115 communicates with the accommodation chamber 2111. In the present embodiment, the opening of the strainer mounting groove 2112 and the opening of the receiving groove 111 are on the same side of the main body 211, and the cover 212 covers the strainer mounting groove 2112 and the receiving chamber 2111 after being mounted on the main body 211. An input passage 2121 for communicating the screen installation groove 2112 and the receiving chamber 2111 is further provided at a side of the cover body 212 adjacent to the main body 211. Further, the first fluid passage 2114, the screen mounting groove 2112 and the accommodation chamber 2111 are communicated through the input passage 2121.

As shown in fig. 3, in the present embodiment, the hollow passage 1311 on the rotary shaft 131 in the motor rotor 13 communicates with the accommodation chamber 2111. Specifically, a communication groove 2111c is further provided at the bottom of the accommodating chamber 2111, and the communication between the accommodating chamber 2111 and the hollow channel 1311 is achieved through the communication groove 2111c, so that fluid in the electric pump can enter the interior of the driving motor through the communication groove 2111c and the hollow channel 1311 to achieve cooling and lubrication of the interior of the motor. At the same time, the fluid flows into the electric pump through the return passage C provided in the front cover 113 or the cover body 212, and the circulation cooling action of the fluid is realized.

According to the present invention, the filter mounting groove is formed on the main body 211 and is formed in a groove manner, such that the filter can be mounted at the side of the rotor assembly, and the communication of the channel for inputting the fluid can be realized by providing the connection channel on the cover body. The mode of setting up the recess in order to realize the filter screen installation in this kind of on the main part has not only rationally utilized the whole space of main part 211, has effectively avoided changing the problem of main part shape and size, but still can not exert an influence to the position and the mode of setting up of other structures.

In addition, the filter screen mounting groove is arranged at the side of the accommodating cavity, so that input fluid can flow into the accommodating cavity in the shortest stroke after passing through the filter screen, an oil path between the filter screen and the accommodating cavity is shortened, and the filter screen mounting groove is favorable for ensuring the sufficient supply of the fluid after the filter screen is mounted. Simultaneously, through set up input channel on the lid, not only shortened the filter screen like this and held the distance between the chamber, effectively utilized the space of lid moreover.

In addition, the weight of the motor pump is effectively reduced by directly arranging the channel and the mounting groove on the main body and the cover body, and the effect of light weight is realized.

In the present embodiment, the cover 212 is integrated with the front cover 113 in the housing 11, that is, the cover 212 and the front cover 113 may be provided as one member in practical applications. Of course, the cover 212 and the front cover 113 of the housing 11 may be provided separately, and may be selected as needed.

As shown in fig. 4, according to an embodiment of the present invention, the screen mounting grooves 2112 are distributed in plurality at intervals from the accommodating chamber 2111 in the circumferential direction of the accommodating chamber 2111. In the present embodiment, three (two, four, or more) screen mounting grooves 2112 are provided, and the screen mounting grooves 2112 are also provided at intervals. The openings of the screen installation grooves 2112 on the side of the main body 211 are regular shapes (e.g., circular, square, etc.). In this embodiment, the interval between each screen mounting groove 2112 and the accommodating chamber 2111 may be equal or unequal, and may be adjusted according to actual needs to achieve reasonable distribution of each screen mounting groove 2112.

The installation number of the filter screens can be effectively increased by providing the plurality of filter screen installation grooves 2112 on the main body 211, which is very effective for increasing the fluid flow of the input passage and effectively reduces the overall weight of the main body 211.

According to another embodiment of the present invention, the screen mounting groove 2112 is provided in one spaced relation to the accommodating chamber 2111 along the circumferential direction of the accommodating chamber 2111. In the present embodiment, the screen attachment groove 2112 has an elongated opening on the side surface of the main body 211. In the present embodiment, the opening of the screen attachment groove 2112 may be an elongated shape having an arc shape or an elongated shape having a straight line. In this embodiment, the intervals between the screen mounting grooves 2112 and the accommodating chamber 2111 may be equal or unequal, and may be adjusted according to actual needs to achieve reasonable distribution of the screen mounting grooves 2112.

The filter area of the filter screen can be effectively increased by arranging the strip-shaped filter screen mounting groove 2112 on the main body 211, so that the flow of fluid in the input channel is effectively increased, and the whole weight of the main body 211 is effectively reduced.

As shown in fig. 4 and 5, according to an embodiment of the present invention, the bottom of the accommodation chamber 2111 is provided with an output passage 2111a communicating with the second fluid passage 2115.

With the arrangement, the output channel is arranged for realizing the requirement of fluid output, and the output channel can also store fluid so as to realize continuous and stable fluid output.

Referring to fig. 4, 5, 6, 7, and 8, according to an embodiment of the present invention, the first fluid channel 2114 includes: a first fluid sub-passage 2114a for inputting fluid and a second fluid sub-passage 2114b for communicating with the screen mounting slot 2112. In this embodiment, the first fluid sub-channel 2114a and the second fluid sub-channel 2114b are arranged to intersect, such that fluid input from the first fluid sub-channel 2114a can be uniformly distributed in the second fluid sub-channel 2114b to achieve a stable fluid supply to the screen mounting slot.

As shown in fig. 4, 5, 6, 7 and 8, according to an embodiment of the present invention, the bottom of the receiving chamber 2111 is provided with an input fluid receiving groove 2111 b. In the present embodiment, the input fluid housing groove 2111b is provided opposite to the input passage 2121.

With the above arrangement, more storage space is provided in the pump body, which is advantageous in achieving sufficient supply of fluid in the motor pump.

As shown in fig. 4 and 5, according to an embodiment of the present invention, an output fluid receiving groove 2122 is further formed on the cover 212 adjacent to the main body 211. In the present embodiment, the output fluid housing groove 2122 is provided opposite to the output passage 2111 a.

Through the arrangement, more storage spaces are formed in the pump body, and therefore continuous and stable fluid output is achieved.

With the above arrangement, the opening of the first fluid sub-passage 2114a is provided on the circumferential side wall of the main body 211, so that the piping installation of the pump of the present invention is more convenient and flexible.

As shown in fig. 4, 5, 6, 7 and 8, according to an embodiment of the present invention, the opening of the second fluid passage 2115 is also provided on the circumferential sidewall of the main body 211, so that the piping installation of the pump of the present invention is more convenient and flexible.

The foregoing is merely exemplary of particular aspects of the present invention and devices and structures not specifically described herein are understood to be those of ordinary skill in the art and are intended to be implemented in such conventional ways.

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

Claims

1. A drive motor, comprising:

a housing (11);

the stator (12) is arranged in the shell (11) and is fixedly connected with the shell (11);

a motor rotor (13) supported within the housing (11), and the stator (12) being disposed around the motor rotor (13);

the motor rotor (13) is rotatably arranged in the housing (11), and the motor rotor (13) is axially slidably arranged in the housing (11).

2. The drive motor according to claim 1, wherein the housing (11) comprises: the device comprises a cylinder (111), a rear cover (112) and a front cover (113) which are arranged at two opposite ends of the cylinder (111);

the rotating shaft (131) of the motor rotor (13) is rotatably and slidably connected with the rear cover (112) and the front cover (113).

3. The drive motor according to claim 2, wherein a sliding bearing is further provided at a position where the rotation shaft (131) is connected to the rear cover (112) and/or the front cover (113).

4. The drive motor according to claim 2 or 3, wherein the rear cover (112) is provided with a mounting groove (1121) for connecting the rotation shaft (131);

the depth of the mounting recess (1121) is greater than the connection length of the rotation shaft (131) within the mounting recess (1121).

5. The drive motor according to claim 4, wherein the rotary shaft (131) is an optical axis and is provided with a hollow passage (1311) penetrating a body thereof in an axial direction thereof;

an output connecting structure (1312) is arranged at one end of the rotating shaft (131) far away from the rear cover (112);

the cross-sectional profile of the output connection (1312) is of regular geometry or the cross-sectional profile of the output connection (1312) is of trim circle shape.

6. The drive motor according to claim 1, further comprising: a circuit unit (14);

the circuit unit (14) is provided on the rear cover (112);

the motor rotor (13) further comprises a permanent magnet (132) fixedly connected to the rotating shaft (131);

the permanent magnet (132) is disposed opposite the stator (12).

7. An electromotive system employing the drive motor according to any one of claims 1 to 6, characterized by comprising: the device comprises a driving motor (1) and an electric pump (2) connected with the driving motor (1);

the electric pump (2) comprises: a pump housing (21) and an electric pump rotor assembly (22) disposed in the pump housing (21);

the motor rotor (13) of the driving motor (1) is connected with the electric pump rotor assembly (22), and the motor rotor (13) can be arranged in a sliding mode relative to the electric pump rotor assembly (22) along the axial direction.

8. An electrical system according to claim 7, characterized in that the electrical pump rotor assembly (22) is provided with an input connection (22a) for connection with an output connection (1312) on a rotating shaft (131) in the motor rotor (13);

the input connection structure (22a) and the output connection structure (1312) are arranged in a sliding connection in a matched shape;

an end surface 1312a of the rotary shaft 131 formed by providing the output connection structure 1312 is spaced from an upper surface of the electric pump rotor assembly 22.

9. The electric system according to claim 7 or 8, characterized in that the pump housing (21) comprises:

a main body (211), the main body (211) having a receiving chamber (2111) for mounting the electric pump rotor assembly (22), and the receiving chamber (2111) having an opening at one side of the main body (211);

a cover (212) provided on the side of the main body (211) where the opening is provided;

one side, provided with the opening, of the main body (211) is also provided with at least one filter screen installation groove (2112) and a filter screen (2113) installed in the filter screen installation groove (2112);

the main body (211) is also provided with a first fluid channel (2114) for inputting fluid and a second fluid channel (2115) for outputting fluid;

the first fluid channel (2114), the filter screen mounting groove (2112) and the accommodating cavity (2111) are communicated;

the second fluid passage (2115) is communicated with the accommodation chamber (2111);

a hollow channel (1311) on a rotating shaft (131) in the motor rotor (13) is communicated with the accommodating cavity (2111);

the cover body (212) and a front cover (113) in the shell (11) are integrated or separated;

an input channel (2121) for communicating the filter screen installation groove (2112) with the accommodating cavity (2111) is arranged on one side of the cover body (212) adjacent to the main body (211);

the bottom of the containing cavity (2111) is provided with an output channel (2111a) communicated with the second fluid channel (2115);

a plurality of filter screen mounting grooves (2112) and the accommodating cavity (2111) are distributed at intervals along the circumferential direction of the accommodating cavity (2111);

the openings of the plurality of accommodation cavities (2111) on the side of the main body (211) are regular in shape; alternatively, the first and second electrodes may be,

the filter screen installation groove (2112) and the accommodating cavity (2111) are arranged in a spaced mode in the circumferential direction of the accommodating cavity (2111) to form a single groove;

the opening of the screen mounting groove (2112) on the side of the main body (211) is long.

10. The electric powered system of claim 9, characterized in that the first fluid passage (2114) comprises: a first fluid sub-channel (2114a) for inputting a fluid and a second fluid sub-channel (2114b) for communicating with the screen mounting groove (2112);

the first fluid sub-channel (2114a) is cross-connected with the second fluid sub-channel (2114 b);

the opening of the first fluid sub-channel (2114a) is arranged on the circumferential side wall of the main body (211);

an input fluid accommodating groove (2111b) is formed at the bottom of the accommodating cavity (2111);

the input fluid receiving groove (2111b) is disposed opposite to the input channel (2121);

an output fluid accommodating groove (2122) is formed in one side, adjacent to the main body (211), of the cover body (212);

the output fluid housing groove (2122) is disposed opposite to the output channel (2111 a).