CN216467300U - Power device and vehicle - Google Patents

Abstract

The application relates to a power device which comprises a shell, a motor, a first bearing and a connecting piece. The motor, the first bearing and the connecting piece are contained in the shell. The motor comprises an output shaft; the first bearing is fixedly connected with the output shaft and synchronously rotates along with the output shaft; the connecting piece comprises a fixing part and an abutting part, wherein the fixing part is fixed on the inner side of the shell, and the abutting part extends into the first bearing. The abutting part comprises at least two support legs which are uniformly distributed in the circumferential direction, and each support leg abuts against the first bearing; this application forms the butt through circumference evenly distributed's stabilizer blade simultaneously with first bearing, and the position structural stability of the two contact is higher, can guarantee that axle current realizes the ground connection function with the casing through first bearing and connecting piece, and then has promoted power device's reliability and life. The application also relates to a vehicle equipped with the power device.

Description

Power device and vehicle

Technical Field

The application relates to the field of automobiles, in particular to a power device and a vehicle provided with the power device.

Background

The motor provides power through the output shaft, but the motor can produce the electric current in the course of working, and this electric current conduction forms the axle current to the output shaft, if the axle current can not be released, in the long-time working process of motor, can form the galvanic corrosion to components such as output shaft to influence the performance of motor along with the time.

The traditional method for eliminating the current of the motor shaft comprises the step of additionally arranging a grounding structure such as a conductive brush at one end of an output shaft of the motor. However, in the long-term working process, the conductive brush is in poor contact with the shell due to the bad phenomena of abrasion, deformation, displacement and the like of the conductive brush, and the current of the motor shaft cannot be stably eliminated for a long time.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a power device, through carrying out configuration optimization in the scheme that adopts electrically conductive bearing to eliminate axle electric current to promote power device's axle electric current ground connection reliability. Meanwhile, the application also relates to a vehicle equipped with the power device.

In a first aspect, the present application is directed to a power plant that includes a housing, a motor, a first bearing, and a coupling. The motor is fixed on the inner side of the shell and comprises an output shaft; the first bearing is positioned on the inner side of the output shaft and comprises an inner ring and an outer ring, the outer ring is fixedly connected with the output shaft, and the first inner cavity is positioned on the inner side of the outer ring and can rotate relative to the outer ring; the connecting piece includes fixed part and butt portion, and the fixed part is fixed in the casing inboard, and butt portion connects in one side of fixed part, and the part is located the inboard of first inner chamber, and butt portion includes two at least stabilizer blades, and the circumference evenly distributed of two at least stabilizer blades along first axis, the coincidence of the rotation center line of first axis and output shaft, every stabilizer blade all with the inner circle butt, the connecting piece adopts conducting material.

This application power device accepts and fixed motor through the casing, still through the cooperation of first bearing and connecting piece, realizes the electrically conductive connection between output shaft and the casing. Wherein first bearing and output shaft coaxial setting, and outer lane and output shaft fixed connection for the outer lane can rotate along with the output shaft synchronization. The connecting piece then connects between casing and inner circle, and the butt portion of connecting piece includes at least two stabilizer blades along circumference evenly distributed, when a plurality of stabilizer blades respectively with the inner circle butt, contact pressure between butt portion and the inner circle is even relatively, the homoenergetic when the output shaft appears arbitrary direction and slightly rocks can guarantee the good contact between at least partial stabilizer blade and the inner circle, and then makes the cooperation of first bearing and connecting piece, can realize effectual electric conduction between output shaft and the casing. The grounding structure of the motor output shaft in the power device is high in reliability, and the service life of the power device can be prolonged.

In a possible implementation manner, the abutting part has elasticity, each support leg has an attaching section abutted with the inner ring, and when the abutting part is in a free state, the maximum outer diameter of the attaching section is larger than the inner diameter of the inner ring.

In this implementation, the maximum outer diameter through setting up the laminating section is greater than the internal diameter of inner circle, can form the butt with the inner circle when guaranteeing the butt portion to stretch into the inner circle. And the abutting part is elastic, namely, each support leg is elastic, and each support leg is always in an elastic deformation state and keeps the elastic force abutting towards the inner ring in the process of abutting against the inner ring. Thus, when wear occurs between the abutting part and the inner ring, poor contact caused by the wear can be compensated through the elastic deformation of each support leg relative to the inner ring.

In a possible implementation manner, the connecting member includes a supporting column, the supporting column is fixedly connected or integrally formed with the fixing portion, the supporting column is located on one side of the abutting portion along the direction of the first axis, the abutting portion includes a connecting ring, the at least two support legs are both fixedly connected with the connecting ring, and the connecting ring is sleeved on the supporting column.

In this implementation, the fixing portion and the abutting portion may be provided as two relatively independent components, which are convenient to process respectively. Wherein fixed part and support column all can adopt the material preparation that rigidity intensity is higher relatively, and then guarantee the stability of being connected between connecting piece and the casing to form reliable support to butt joint portion. And after the support legs are mutually fixed through the connecting rings, the connecting rings are sleeved on the support columns, so that the axial symmetry effect of the abutting part relative to the first axis can be guaranteed.

In a possible implementation mode, the support column has a first outer diameter, the connecting ring is provided with a notch along the circumferential direction, when the abutting part is in a free state, the connecting ring is inwards contracted due to the elasticity of the connecting ring, and the inner diameter of the contracted connecting ring is smaller than the first outer diameter.

In this implementation, since the abutting portion has elasticity, after the notch is provided in the circumferential direction of the connection ring, the connection ring is in an inwardly contracted posture due to the elasticity of the connection ring and the notch. And the inner diameter of the connecting ring in a free state is set to be smaller than the first outer diameter, so that the connecting ring is in an elastic opening state when being sleeved on the supporting column and always applies elastic force towards the supporting column. Therefore, the friction force between the connecting ring and the supporting column is increased, and reliable connection and conduction between the abutting part and the supporting column are further ensured.

In a possible implementation, the number of connecting rings is two, and the two connecting rings are arranged at two ends of the abutting portion in a direction of the first axis.

In this implementation, set up two go-between in the direction along first axis to be located the both ends of butt portion respectively, make two go-between be connected and form the support with a plurality of stabilizer blades respectively, promoted the structural stability of butt portion, guarantee that each stabilizer blade keeps elasticity and forms the gesture of mutual butt with the inner circle in long-time working process.

In a possible implementation manner, the supporting column includes a limiting end, the limiting end is located on one side of the abutting portion, which deviates from the fixing portion, and the maximum diameter of the limiting end is greater than the first outer diameter.

In this implementation, the support column is arranged to penetrate through the abutting portion and form a limiting end, and the limiting end and the fixing portion are arranged at two end positions of the abutting portion in a split manner in the direction along the first axis. After the maximum diameter that sets up spacing end is greater than the first external diameter of support column, spacing end and fixed part can be followed relative both ends restriction butt portion's position respectively to guarantee that every stabilizer blade is in elastic deformation's state in the butt portion.

In a possible implementation mode, the inner ring has the terminal surface that deviates from the fixed part, and every stabilizer blade still is equipped with the extension section, and the extension section is located the laminating section and deviates from fixed part one side, and when butt portion stretched into the inner ring, the biggest external diameter of extension section was greater than the internal diameter of inner ring, extension section and terminal surface butt in order to fix butt portion.

In this implementation, set up the extension on each stabilizer blade, and the laminating section that the extension is located deviates from fixed part one side, and each stabilizer blade passes first bearing along the direction of first axis promptly. And the maximum outer diameter of the extension section is larger than the inner diameter of the inner ring, so that the extension section can be abutted against the end face of the first bearing, and the bad phenomena that the abutting part slides towards one side of the fixing part and the abutting part of the attaching section and the inner ring falls off are prevented.

In a possible implementation, the number of legs is two or a multiple of two.

In this implementation, because a plurality of stabilizer blades evenly distribute around the circumference of first axis, therefore set up the quantity of stabilizer blade as the dual back, in the direction of symmetry for first axis, can distribute two symmetrical stabilizer blades to form respectively and support with the inner circle. The two symmetrical support legs have the same pressure and opposite directions when being abutted against the inner ring, and the stress of the whole abutting part is relatively balanced in the process of abutting against the inner ring, so that the additional load on the output shaft is avoided.

In a possible implementation manner, in the extending direction along the output shaft, the output shaft has a first end far away from the motor body, the first end is provided with an accommodating hole, and the first bearing is embedded in the accommodating hole.

In this implementation, by opening the receiving hole at the first end of the output shaft and receiving the first bearing, the fixed connection of the outer ring and the output shaft can be achieved. And this application power device's structure is compacter, is favorable to controlling its whole volume.

In one possible implementation, the power plant further comprises a second bearing, the second bearing being connected between the output shaft and the housing;

the second bearing is provided with a second resistor between the output shaft and the shell, the first bearing and the connecting piece are provided with a first resistor between the output shaft and the shell, and the second resistor is larger than the first resistor.

In this implementation, the second bearing is respectively fixedly connected with the output shaft and the housing, so that the support function of the second bearing on the output shaft is realized. Therefore, in the process that the motor drives the output shaft to rotate, the output shaft can keep a relatively stable rotating posture under the support of the second bearing. Through setting up the second resistance that the second bearing formed between output shaft and casing, be greater than the first resistance that first bearing and connecting piece formed between output shaft and casing for the axle current that forms on the output shaft can realize the ground function to the casing through first bearing and connecting piece, avoids forming the electric property route on the second bearing, and then protects the second bearing and avoids the galvanic corrosion.

In one possible embodiment, the second bearing comprises a second inner ring and a second outer ring, the second inner ring being fixedly connected to the output shaft and the second outer ring being fixedly connected to the housing.

In this implementation, the second inner ring and the second outer ring can rotate relatively, and the support function of the second bearing on the output shaft is realized through the fixed connection between the second inner ring and the output shaft and the fixed connection between the second outer ring and the housing.

In a possible implementation manner, the motor includes a rotor and a stator sleeved outside the rotor, the stator is fixedly connected with the housing, and the rotor is fixedly connected with the output shaft and drives the output shaft to rotate.

In this implementation, the motor stator may be fixed within the housing and drive the rotor to rotate to output power. The rotor and the stator are arranged along the same axis, and the rotor is fixedly connected with the output shaft and used for driving the output shaft to rotate so as to output power of the motor.

In a second aspect, the present application relates to a vehicle including the power unit described above. As can be understood, the vehicle is provided with the power device, so that the shaft current generated by the motor in the working process can be effectively conducted to the shell and the grounding function is realized. The vehicle of the application also improves the working reliability and has longer service life.

Drawings

FIG. 1 is a schematic cross-sectional view of a power plant provided by an embodiment of the present application;

FIG. 1a is an enlarged, fragmentary schematic view of a cross-section of the power plant of FIG. 1;

FIG. 2 is an exploded schematic view of the power plant of FIG. 1;

FIG. 3 is a schematic structural view of a coupling member of the power plant of FIG. 1;

FIG. 4 is a schematic illustration of the engagement of the coupling member with the first bearing in the power plant of FIG. 1;

FIG. 5 is a schematic structural view of another embodiment of a coupling member of the power plant of FIG. 1;

FIG. 6 is a schematic view of the coupling of FIG. 5 with a first bearing;

FIG. 7 is an exploded view of the coupling and first bearing of FIG. 6;

FIG. 8 is a schematic structural view of yet another embodiment of the connector shown in FIG. 5;

FIG. 9 is a schematic view of the coupling member of FIG. 8 with a first bearing;

FIG. 10 is a schematic structural view of yet another embodiment of the connector shown in FIG. 5;

FIG. 11 is a schematic view of the construction of the connecting stud of the connector of FIG. 10;

FIG. 12 is a schematic view of the structure of the retaining section of the connector shown in FIG. 10;

FIG. 13 is a schematic view of the holding section of the connector shown in FIG. 12 in another viewing direction;

FIG. 14 is a schematic view of the coupling of FIG. 10 with a first bearing;

FIG. 15 is an exploded view of the coupling and first bearing of FIG. 14;

FIG. 16 is a schematic structural view of another embodiment of the connecting column of FIG. 11;

fig. 17 is a schematic view of the assembled connecting column and holding section of fig. 16.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "coupled", as used herein, includes both direct and indirect coupling, unless otherwise indicated. In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are used only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on" or "over" a second feature may be directly or diagonally over the first feature or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under" or "beneath" a second feature may be directly or obliquely under the first feature or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, a power device 100 according to an embodiment of the present disclosure includes a housing 101 and a transmission shaft (not shown). Wherein the transmission shaft is used for outputting the power of the power device 100 outwards. In some embodiments, the housing 101 may be configured as a closed structure, thereby forming a sealed interior cavity for protecting the remaining components housed within the housing 101. In other embodiments, the housing 101 may be configured as a non-closed bracket structure, and the housing 101 is only used for supporting the rest of the components fixed in the housing 101, and ensuring the function of the power device 100 by ensuring the relative position relationship between the components.

Inside the housing 101, the power unit 100 is further provided with a motor 30 and a connecting member 40. The motor 30 is used as a power source of the power device 100, is accommodated and fixed in the housing 101, and is in transmission connection with the transmission shaft, and provides power to the outside through the transmission shaft.

Please refer to fig. 1a for a partial enlarged view. The housing 101 also accommodates the first bearing 10. The motor 30 includes a stator 31 and a rotor 32, wherein the stator 31 is disposed outside the rotor 32 and is fixedly connected to the housing 101. The rotor 32 is rotatable about its rotational center by the stator 31. In the present implementation, the center of rotation is defined as the second axis 002. The rotor 32 is fixedly connected with an output shaft 33, and the motor 30 rotates synchronously with the rotor 32 through the output shaft 33, so that the power output of the motor 30 can be realized. The output shaft 33 is located on one side of the motor 30 in the direction along the second axis 002, that is, the output shaft 33 is located on one side of the motor 30 in the direction along the second axis 002. In some embodiments, the output shaft 33 may also be provided integrally with the rotor 32. The output shaft 33 can transmit the rotation of the rotor 32 to an external function device in the form of a flat key, a spline, a gear, or the like, thereby realizing the power output of the motor 30. It will be appreciated that during synchronous rotation of the output shaft 33 with the rotor 32, the output shaft 33 also rotates about the second axis 002.

In some embodiments, the power device 100 may further include a transmission assembly (not shown) that is in transmission connection with the transmission shaft and the output shaft 33, respectively, for realizing the transmission connection between the motor 30 and the transmission shaft. The transmission assembly can regulate the speed (including increasing or decreasing) of the rotational power output by the motor 30, and then transmit the power to an external function device through the transmission shaft. The transmission assembly and the output shaft 33 may be connected by the flat key, spline, gear, etc. as mentioned above, which is not limited to the power device 100 of the present application.

The power plant 100 of the present application may be used in a vehicle related to the present application, such as an electric vehicle or a hybrid vehicle, as a power assembly thereof. The power plant 100 may be drivingly connected to wheel ends of an electric or hybrid vehicle to drive the wheels in rotation to effect travel of the vehicle. Because the power device 100 can effectively ground the shaft current generated when the motor 30 works, the working reliability of the vehicle is improved, and the service life is longer. It is understood that the power plant 100 of the present application can also be used as a power plant of any equipment and output the power of the motor 30 through the output shaft 33.

The first bearing 10 is fixedly connected to the output shaft 33. Specifically, the first bearing 10 includes an inner race 11 and an outer race 12, wherein the outer race 12 is fixedly connected to the output shaft 33. The inner ring 11 is rotatably connected with the outer ring 12, and the inner ring 11 and the outer ring 12 can be rotatably connected through balls or needle rollers and the like. Referring to the illustration of fig. 2, the output shaft 33 has a first end 331, and the first end 331 is located at a side far from the body of the motor 30 in the direction along the second axis 002. The first end 331 is formed with a receiving hole 332, the receiving hole 332 is formed in a circular shape in a cross section perpendicular to the second axis 002, and an inner diameter of the receiving hole 332 is substantially equal to an outer diameter of the outer ring 12, so that the first bearing 10 can be inserted into the receiving hole 332 and the output shaft 33 and the outer ring 12 can be fixedly connected. It is understood that the geometric axis of the receiving hole 332 is also coincident with the second axis 002, so that the first bearing 10 inserted into the receiving hole 332 can rotate synchronously with the output shaft 33 around the second axis 002.

Offer accepting hole 332 in the first end 331 department of output shaft 33 to inlay first bearing 10 in accepting hole 332, realize outer lane 12 and output shaft 33's fixed connection, can avoid first bearing 10 to monopolize according to the space in this application power device 100, and then make this application power device 100's inner structure compacter, be favorable to the control of power device 100 whole volume. It will be appreciated that in other embodiments, the fixation between the output shaft 33 and the outer race 12 may also be achieved by an adaptor (not shown). The adaptor may be disposed between the output shaft 33 and the first bearing 10 along the second axis 002, and respectively sleeved outside the output shaft 33 and the outer ring 12, so as to achieve the fixed connection between the output shaft 33 and the outer ring 12, and enable the outer ring 12 to rotate synchronously with the output shaft 33 around the second axis 002. In the power unit 100 of the present application, the adapter needs to be electrically conductive.

The connecting member 40 is fixedly connected to the housing 101. The connecting member 40 includes a fixing portion 42 and an abutting portion 41, wherein the fixing portion 42 and the abutting portion 41 are arranged along the direction of the first axis 001 and are conducted, that is, the fixing portion 42 is located on one side of the abutting portion 41 along the direction of the first axis 001. The fixing portion 42 is used to be fixedly connected with the housing 101, and makes the first axis 001 of the connecting member 40 coincide with the second axis 002 of the output shaft 33. And when the connecting piece 40 is fixed on the housing 101, the abutting portion 41 extends into the inner ring 11 and abuts against the inner ring 11. Specifically, the abutting portion 41 includes at least two legs 411, and the at least two legs 411 are uniformly distributed along the circumferential direction of the first axis 001 and are respectively fixedly connected to the fixing portion 42. When the abutment portion 41 projects into the inner ring 11, each leg 411 abuts against the inner surface 211 of the inner ring 11.

In the illustration of fig. 1 and 2, the connecting element 40 is configured in the shape of a connecting bridge 44. Referring to fig. 3, the connecting bridge 44 includes two fixing arms 442 and two abutting pins 441. Wherein two fixing arms 442 can be configured as fixing portions 42 of the connecting bridge 44, two abutting pins 441 can be configured as abutting portions 41 of the connecting bridge 44, and each abutting pin 441 is configured as a leg 411. The two fixing arms 442 are fixedly connected to the two abutting pins 441.

In the structure of the connecting bridge 44 illustrated in fig. 3, two fixing arms 442 are symmetrically disposed along the first axis 001, a screw hole 4421 is disposed on a side of the fixing arm 442 away from the first axis 001, and the two fixing arms 442 are respectively fixedly connected to the housing 101 through the respective screw holes 4421. The two abutting pins 441 are also symmetrically disposed along the first axis 001, that is, the two abutting pins 441 are uniformly distributed along the circumferential direction of the first axis 001. The two abutting pins 441 simultaneously extend into the inner ring 11 and respectively abut against the inner ring 11. It can be understood that the second axis 002 is coincident with the first axis 001, so that the two abutting pins 441 are symmetrical to each other along the direction of the second axis 002 when abutting against the inner ring 11. That is, the positions where the two abutting pins 441 abut against the inner ring 11 are symmetrical to each other along the second axis 002.

Therefore, please refer to the force-receiving diagram between the connecting bridge 44 and the first bearing 10 shown in fig. 4. In the process of abutting the connecting bridge 44 and the inner ring 11, the abutting pressures F1 of the inner ring 11 respectively received by the two abutting pins 441 are the same in magnitude and opposite in direction. The two abutting pins 441 are in a relatively balanced stressed state, and can be kept in stable contact with the inner ring 11 even after long-term use, so that the phenomenon of poor contact between the two abutting pins 441 and the inner ring 11 due to relative displacement between the two abutting pins and the inner ring 11 caused by uneven stress is avoided.

It can be understood that, in other embodiments, the connecting element 40 of the present application may have a plurality of legs 411 disposed in the abutting portion 41, and the plurality of legs 411 are uniformly distributed with respect to the circumferential direction of the first axis 001, so that the abutting portion 41 is in a balanced state when abutting against the inner ring 11 of the first bearing 10, and the abutting portion 41 is kept in stable contact with the inner ring 11 during long-term use.

It should be noted that in the power plant 100 of the present application, the output shaft 33, the first bearing 10 and the connecting member 40 are all electrically conductive. During operation, the motor 30 generates an electric current which, when discharged to the output shaft 33, may cause electrical corrosion of the output shaft 33 or components connected to the output shaft 33 if not released. The performance of the motor 30 is affected after the power device 100 works for a long time, and the service life of the motor 30 is even shortened. In the prior art, the motor is additionally provided with a conductive brush and other structures at one end of the output shaft 33, so that the output shaft 33 is electrically grounded. However, the conductive brush may be displaced relative to the output shaft 33 after long-term use due to uneven stress, etc., resulting in poor contact between the conductive brush and the output shaft 33 and failure of the grounding function.

This application power device 100 has guaranteed through the mode of a plurality of stabilizer blades 411 along the circumference evenly distributed of first axis 001 in butt portion 41 that the atress between butt portion 41 and the inner circle 11 is even, and when output shaft 33 appeared rocking slightly of arbitrary direction, also can both guarantee the good contact between at least partial stabilizer blade 411 and the inner circle 11 to reliable contact effect has been obtained. The output shaft 33 is electrically connected with the housing 101 through the cooperation of the first bearing 10 and the connecting piece 40. The shaft current on the output shaft 33 can be transmitted to the housing 101 through the first bearing 10 and the connecting member 40, so as to realize the grounding function. Further, the electric corrosion phenomenon which may be formed because the shaft current in the output shaft 33 cannot be released is avoided, the reliability of the power device 100 is improved, and the service life is prolonged.

In a possible implementation, the abutment 41 is also elastic. I.e., each leg 411 is resilient. Specifically, the leg 411 has an abutting section 4111 abutting against the inner ring 11, and when the abutting portion 41 is in a free state (i.e., when the abutting portion 41 does not extend into the inner ring 11), a structure surrounded by the abutting sections 4111 has a maximum outer diameter D0. Inner race 11 has an inner diameter d 1. The maximum outer diameter D0 of the abutting section 4111 is set larger than the inner diameter D1 of the inner race 11. The abutting section 4111 of each leg 411 is elastically deformed by the pressure of the inner ring 11 when the abutting portion 41 protrudes into the inner ring 11. The integral structure of the engaging portion 4111 is contracted inward of the first axis 001, so that each supporting leg 4111 abuts against the inner ring 11.

Since each leg 411 has elasticity, each leg 411 is always in an elastically deformed state during abutment with the inner ring 11, and maintains an elastic force F2 (shown in fig. 4) abutting against the inner ring 11. That is, each leg 411 has elastic potential energy to be expanded with respect to the first axis 001 by being elastically deformed to be contracted toward the first axis 001. The elastic potential energy ensures the elasticity of each leg 411 to the inner ring 11, and after the power device 100 of the present application is used for a long time, when the inner ring 11 and/or each leg 411 are worn, each leg 411 can maintain the reliable contact to the inner ring 11 by releasing the elastic potential energy. Specifically, the elastic deformation of the legs 411 toward the inner ring 11 can compensate for the gap between the inner ring 11 and the legs 411 due to wear, thereby maintaining the reliable connection between the abutting portion 41 and the first bearing 10.

It should be noted that, during the rotation of the first bearing 10 with the output shaft 33, the outer ring 12 is fixedly connected with the output shaft 33, and the outer ring 12 needs to rotate synchronously with the output shaft 33. However, because of the rotational connection between the outer ring 12 and the inner ring 11, the inner ring 11 can rotate synchronously with the output shaft 33, and can also be kept stationary with respect to the second axis 002 by the abutting force of the abutting portion 41.

Please refer to fig. 5, which is a schematic structural diagram of another implementation of the connecting member 40 in the power device 100 of the present application. In the embodiment of fig. 5, the connection 40 is configured in the shape of a conductive post 45. The conductive post 45 is provided with a connection post 452 and an abutting section 451 along the direction of the first axis 001, and in this implementation, the connection post 452 and the abutting section 451 are of an integral structure. Wherein the connection stud 452 can be configured as a fixing portion 42 of the conductive stud 45 and the abutment section 451 can be configured as an abutment portion 41 of the conductive stud 45. Wherein, butt section 451 is equipped with a plurality of butt stabilizer blades 4511, and a plurality of butt stabilizer blades 4511 are along the circumference evenly distributed of first axis 001, and a plurality of butt stabilizer blades 4511 still respectively with spliced pole 452 fixed connection. It will be appreciated that abutment leg 4511 is configured as leg 411 of connection member 40.

Please refer to fig. 6 and 7, which show the structure of the conductive post 45 fixed on the housing 101. Wherein fig. 7 is an exploded view of fig. 6. The shell 101 is provided with a positioning hole 1011, the shape of the positioning hole 1011 is matched with the shape of the connecting column 452, and the connecting column 452 extends into the positioning hole 1011 to be fixedly connected with the shell 101. It can be appreciated that, since the first axis 001 of the conductive post 45 needs to coincide with the second axis 002 of the output shaft 33 after the connecting post 452 is inserted into the positioning hole 1011, the geometric axis of the positioning hole 1011 needs to be disposed along the second axis 002. That is, when the motor 30 is fixed to the housing 101, the geometric axis of the positioning hole 1011 coincides with the second axis 002. This application power device 100 does not restrict the fixed connection mode of spliced pole 452 and locating hole 1011, and the two can be fixed mutually through arbitrary modes such as threaded connection, welding, riveting or even interference fit connection. Because of the central symmetrical structure design of the abutting section 451, in this embodiment, the connection between the conductive pillar 45 and the positioning hole 1011 only needs to keep the coincidence of the first axis 001 and the second axis 002, so that the function of the connection member 40 and the first bearing 10 in cooperation for conducting current can be realized.

In this embodiment, the number of the abutting legs 4511 is plural, and the plural abutting legs 4511 are uniformly distributed along the circumferential direction of the first axis 001, so that the sum of the pressures applied to the abutting between the respective abutting legs 4511 and the inner ring 11 is zero, and the reliable abutting of the abutting section 451 and the inner ring 11 can also be ensured. It will be appreciated that the abutment section 451 may also be provided with a spring.

In some embodiments, when there are a plurality of abutment legs 4511 in the abutment section 451, the number of the plurality of abutment legs 4511 may also be a multiple of two, i.e., the number of abutment legs 4511 is a double number. Thus, in any direction symmetrical with respect to the first axis 001, two symmetrical abutting legs 4511 are distributed, and the two symmetrical abutting legs 4511 are respectively abutted against the inner ring 11. Similar to the principle of the connecting member 40 configured as the connecting bridge 44, the two symmetrical abutting legs 4511 generate the same pressure and opposite directions when abutting against the inner ring 11, so that the stress of the whole abutting section 451 during the abutting against the inner ring 11 is relatively balanced, thereby avoiding the additional load of the abutting section 451 on the output shaft 33.

Please refer to fig. 8 for a schematic structural diagram of another embodiment of the conductive pillars 45. In the embodiment of fig. 8, the conductive post 45 also includes a connection post 452 and an abutment section 451. Further, each abutment leg 4511 is also provided with an extension 4513. Specifically, please refer to fig. 9. The abutment foot 4511 also includes a butt segment 4512, the butt segment 4512 being adapted to abut and make conductive contact with the inner race 11. Extension 4513 is located on the side of compliant segment 4512 opposite attachment post 452. And as shown in fig. 9, when abutment section 451 extends into inner race 11, each abutment leg 4511 extends through inner race 11 and locates extension 4513 on the other side of inner race 11 from attachment post 452. When the abutting section 451 extends into the inner race 11, the connecting post 452 and the extended section 4513 are arranged on opposite sides of the first bearing 10 in the direction of the second axis 002. Meanwhile, when the abutting section 451 extends into the inner ring 11, the maximum outer diameter D2 of the structure surrounded by the extension 4513 of the plurality of abutting legs 4511 is larger than the inner diameter D1 of the inner ring 11.

On the other hand, the inner ring 11 has an end face 111 facing away from the connection post 452 in a direction along the second axis 002. When the maximum outer diameter D2 of the structure surrounded by the extended section 4513 is greater than the inner diameter D1 of the inner ring 11, the extended section 4513 may form a support against the end surface 111, and prevent the support section 451 from sliding toward the connecting column 452 side along the second axis 002. It will be appreciated that, because each abutment leg 4511 may have elasticity, when the abutment leg 4511 is subjected to a force, the abutment leg 4511 may slide in the direction of the second axis 002 relative to the first bearing 10 through elastic deformation, and there is a bad phenomenon that the attachment segment 4512 of a part of the abutment leg 4511 is displaced in abutment with the inner race 11, or even falls off. By the arrangement of the extension 4513, the reliable abutting of each abutting leg 4511 and the inner ring 11 can be ensured.

See fig. 10 for a further embodiment of the connector 40. In the embodiment of fig. 10, the connection 40 is likewise designed as a conductive pin 45. In the present embodiment, the connection post 452 and the abutting section 451 of the conductive post 45 are provided as independent components, and the connection post 452 and the abutting section 451 are fixedly connected to form the conductive post 45.

Specifically, please refer to the structure of the connection post 452 shown in fig. 11. In the direction along the first axis 001, the conductive post 45 further includes a support post 453. The supporting column 453 is fixedly connected to the connecting column 452, and the supporting column 453 is located on one side of the connecting column 452 close to the abutting section 451. That is, when the connection post 452 is fixed in the positioning hole 1011, the support post 453 extends toward the output shaft 33 along the second axis 002.

See fig. 12 for a structural schematic of the abutment section 451. In the implementation of fig. 12, the abutment section 451 includes a connection ring 454. The plurality of support legs 4511 of the abutting section 451 are fixedly connected with the connecting ring 454, and are sleeved on the supporting column 453 through the connecting ring 454, so that the abutting section 451 is fixedly connected with the connecting column 452.

Please refer to fig. 13 and 14, which illustrate a structure of the connecting member 40 of the present embodiment assembled on the housing 101. Fig. 14 is an exploded view of fig. 13. In this embodiment, the supporting column 453 passes through the abutting section 451 and provides a reliable support for the abutting section 451, so that the abutting leg 4511 on the abutting section 451 can more reliably form an abutment with the inner ring 11, thereby ensuring the electrical conductivity of the structure of the present application. Meanwhile, the abutting section 451 and the connecting column 452 are separately and independently arranged, and the two are convenient to separately process and manufacture. Because the connection post 452 needs to be fixedly connected with the positioning hole 1011 and keep the coincidence of the first axis 001 and the second axis 002, the connection post 452 can be made of a material with relatively high rigidity and strength, so that the connection stability between the connection member 40 and the housing 101 is ensured, and the abutting section 451 is reliably supported. The abutting section 451 is required to have a certain elasticity, so that it can be separately prepared from an elastic material and sleeved on the supporting column 453. Similarly, the power device 100 of the present application does not limit the fixing manner of the supporting column 453 and the connecting ring 454, and the supporting column 453 and the connecting ring 454 can be fixedly connected by welding, screwing, riveting or interference fit connection.

In the embodiment of fig. 11-14, support 453 and connection ring 454 are fixedly connected by an interference fit. In particular, support column 453 has a first outer diameter D1. The connection ring 454 is provided with a notch 4541 (see fig. 15) in its circumferential direction. And when the connection ring 454 is in a free state (not sleeved with the support column 453), the inner diameter D2 of the connection ring 454 is smaller than the first outer diameter D1 of the support column 453. Therefore, when the connection ring 454 is sleeved on the support column 453, the connection ring 454 can be elastically deformed due to the elasticity of the connection ring 454 and the structure of the gap 4541. The inner diameter D2 of the connection ring 454 is enlarged to a configuration equal to the first outer diameter D1. At this time, the connection ring 454 is formed with an elastic force always applied in the direction of the first axis 001, that is, the connection ring 454 always applies an elastic force toward the support column 453. Accordingly, the friction between the connection ring 454 and the support column 453 is increased correspondingly, so that an interference fit connection structure is formed between the connection ring 454 and the support column 453, and the fixed connection between the abutting section 451 and the connection column 452 is realized.

In the illustrations of fig. 10-14, the number of connecting rings 454 is two. The two connecting rings 454 are arranged at two ends of the abutting section 451 along the direction of the first axis 001, and opposite ends of each abutting leg 4511 are fixedly connected with one connecting ring 454. The two connecting rings 454 provide a secure support by a fixed connection with a plurality of abutment legs 4511, respectively, and promote structural stability of the abutment section 451. And the two connecting rings 454 can also make each abutting support 4511 keep elastic force during long-time working, thereby keeping the abutting section 451 and the inner ring 11 in a mutually abutting state. It will be appreciated that in other embodiments, only one connecting ring 454 may be provided in the abutment section 451, and that a plurality of abutment legs 4511 may be fixedly connected with respect to the support column 453 through one connecting ring 454.

Please refer to the structural schematic provided in fig. 16. Support column 453 further includes a retaining end 4531. In the direction along the first axis 001, the position-limiting end 4531 is located on the side of the supporting column 453 facing away from the connecting column 452. Meanwhile, the supporting column 453 penetrates the abutting section 451, and the position-limiting end 4531 is located on the side of the abutting section 451 facing away from the connecting column 452. Or, as depicted, the connecting post 452 and the restraining end 4531 are arranged on opposite sides of the abutment section 451 in the direction of the first axis 001. The maximum diameter D3 of the retaining end 4531 is greater than the first outer diameter D1.

In this implementation, after the support posts 453 pass through the abutment section 452 and form the restraint ends 4531, the restraint ends 4531 and the connection posts 452 are aligned at opposite ends of the abutment section 451 in a direction along the first axis 001. And because the maximum diameter D3 of the position-limiting end 4531 is greater than the first outer diameter D1 of the supporting column 453 and the inner diameter D2 of the connecting ring 454 of the abutting section 451 is expanded to be equal to the first outer diameter D1, the outer diameter D3 of the position-limiting end 4531 is also greater than the inner diameter D2 of the connecting ring 454. The limiting end 4531 and the connecting column 452 can respectively abut against the abutting section 451 from two opposite ends in the direction of the first axis 001, and ensure the position of the abutting section 451 along the first axis 001 (as shown in fig. 17).

As mentioned above, when the connection ring 454 of the abutting section 451 is sleeved on the supporting pillar 452 by interference fit, the connection ring 454 in the abutting section 451 may also slide relative to the supporting pillar 452, and thus the abutting section 451 is displaced relative to the inner ring 11 along the direction of the first axis 001, or the connection ring 454 is displaced relative to the supporting pillar 453, which may not ensure that each of the abutting legs 4511 is in a predetermined elastic deformation state. Such a phenomenon may cause a contact failure between the conductive post 45 and the first bearing 10. Therefore, after the position-limiting end 4531 is provided, the position of the abutting section 451 relative to the supporting column 453 is fixed, and a reliable conductive path can be formed between the conductive pillar 45 and the first bearing 10.

Referring back to fig. 1 and the schematic illustration of fig. 1a, the power plant 100 of the present application may further be provided with a second bearing 20. The second bearing 20 is sleeved on the output shaft 33 and fixedly connected with the housing 101. That is, the second bearing 20 is connected between the output shaft 33 and the housing 101. Specifically, the second bearing 20 includes a second inner race 21 and a second inner race 22 that are rotatable with respect to each other, and the second inner race 21 and the second inner race 22 are rotationally connected by balls or needles. It will be appreciated that the second inner ring 21 and the second inner ring 22 are arranged coaxially. The second inner ring 21 is sleeved on the output shaft 33, and the second inner ring 22 is fixedly connected with the housing 101.

It should be mentioned that the fixed connection of the second bearing 20 to the housing 101 may be a fixed structure extending from the housing 101 towards the second bearing 20, the fixed structure being integrally provided with the housing 101 and serving to fix the second outer ring 11 of the second bearing 20. In other embodiments, the second outer ring 11 of the second bearing 20 may also be fixedly connected to the housing 101 by a boss, so as to form a fixed connection between the second bearing 20 and the housing 101. That is, the boss and the housing 101 are independent structures, and the boss and the housing 101 are combined in a fixed connection manner, and the boss is fixedly connected between the second bearing 20 and the housing 101. Both implementations may achieve the effect of a fixed connection of the second bearing 20 with the housing 101.

Referring to fig. 1a, the housing 101 is provided with a bearing cavity 102, an outer shape of the bearing cavity 102 matches an outer shape of the second inner ring 22, and an inner diameter of the bearing cavity 102 is substantially equal to an outer diameter of the second inner ring 22. The second bearing 20 is fitted into the bearing cavity 102. It is understood that the bearing cavity 102 may be the fixed structure described above, and may also be the boss described above. The inner diameter of the second inner ring 21 of the second bearing 20 is substantially equal to the outer diameter of the output shaft 33, and the second inner ring 21 is fitted over the output shaft 33 along the second axis line 002. And because the second inner ring 21 is disposed coaxially with the second inner ring 22, the geometric axis of the second inner ring 22 also coincides with the second axis 002. Further, the geometric axis of the bearing cavity 102 opened on the housing 101 also needs to coincide with the second axis 002.

When the second inner race 22 is fitted in the bearing cavity 102, the second inner race 22 is fixed with respect to the housing 101, thereby fixing the rotation axis of the second inner race 21 rotatable with respect to the second inner race 22. In particular, the second inner ring 22 may be used to constrain the axis of rotation of the second inner ring 21 so that it always remains coincident with the second axis 002. Thereby, the second bearing 20 is restricted from rotating about the second axis line 002 at all times as well as the output shaft 33. The second bearing 20 supports the output shaft 33, and improves the stress support of the output shaft 33, so that the output shaft is prevented from forming a cantilever-type stress structure relative to the motor 30. The second bearing can keep the stability of the output shaft 33 when rotating around the second axis 002, which is beneficial to stabilizing the power output of the output shaft 33.

In the present embodiment, the second bearing 20 is also electrically conductive, and the second bearing 20 has a second resistance R2 formed between the output shaft 33 and the housing 101. And the first bearing 10 and the connecting member 40 form a first resistance R1 between the output shaft 33 and the housing 101. For the power plant 100 of the present application, it is desirable to provide the second resistor R2 to be greater than the first resistor R1. Thus, the shaft current formed on the output shaft 33 can be conducted to the ground of the housing 101 through the conductive path formed by the first bearing 10 and the connecting member 40. Since the resistance of the second bearing 20 is relatively large, the shaft current on the output shaft 33 is conducted to the housing 101 through the second bearing 20, and the current is relatively small, so that the second bearing 20 can be protected from the electric corrosion. In a possible implementation manner, the first bearing 10 of the present application may be implemented by using a conductive bearing with a relatively high conductive capability, so as to further avoid possible damage to the second bearing 20 caused by the shaft current 33. In other embodiments, the second bearing 20 may be implemented by an insulating bearing, which further facilitates the conduction of the shaft current on the output shaft 33 to the housing 101 through the electrical path formed by the first bearing 10 and the connecting member 40 for grounding.

The above description is only for the specific embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions, such as the reduction or addition of structural elements, the change of shape of structural elements, etc., within the technical scope of the present application, and shall be covered by the scope of the present application; the embodiments and features of the embodiments of the present application may be combined with each other without conflict. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (12)

1. A power plant, comprising:

a housing;

a motor fixed to an inner side of the housing, the motor including an output shaft;

the first bearing is positioned on the inner side of the output shaft and comprises an inner ring and an outer ring, the outer ring is fixedly connected with the output shaft, and the inner ring is positioned on the inner side of the outer ring and can rotate relative to the outer ring; and the number of the first and second groups,

the connecting piece, including fixed part and butt portion, the fixed part is fixed in the inboard of casing, butt portion connect in one side of fixed part, and the part is located the inboard of inner circle, butt portion includes two at least stabilizer blades, two at least the stabilizer blade is along the circumference evenly distributed of first axis, first axis with the center line of rotation coincidence of output shaft, every the stabilizer blade all with the inner circle butt, the connecting piece adopts conducting material.

2. The power unit according to claim 1, wherein the abutting portion has elasticity, and each of the legs has an abutting section abutting against the inner ring, and when the abutting portion is in a free state, a maximum outer diameter of the abutting section is larger than an inner diameter of the inner ring.

3. The power device according to claim 2, wherein the connecting member comprises a supporting pillar, the supporting pillar is fixedly connected or integrally formed with the fixing portion, the supporting pillar is located on one side of the abutting portion along the direction of the first axis, the abutting portion comprises a connecting ring, the at least two legs are fixedly connected with the connecting ring, and the connecting ring is sleeved on the supporting pillar.

4. The power device according to claim 3, wherein the support column has a first outer diameter, the connection ring is provided with a notch along the circumferential direction thereof, when the abutting portion is in a free state, the connection ring is retracted inward due to the elasticity thereof, and the inner diameter of the retracted connection ring is smaller than the first outer diameter.

5. The power unit according to claim 4, wherein the number of the connection rings is two, and the two connection rings are arranged at both ends of the abutting portion in the direction of the first axis.

6. The power device according to claim 5, wherein the support column comprises a limiting end, the limiting end is located on a side of the abutting portion facing away from the fixing portion, and the maximum diameter of the limiting end is larger than the first outer diameter.

7. The power device according to any one of claims 2 to 6, wherein the inner ring has an end surface facing away from the fixing portion, each of the support legs is further provided with an extension portion, the extension portion is located on a side of the attaching portion facing away from the fixing portion, when the abutting portion extends into the inner ring, the maximum outer diameter of the extension portion is larger than the inner diameter of the inner ring, and the extension portion abuts against the end surface to fix the abutting portion.

8. A power plant according to claim 1, characterized in that the number of legs is two or a multiple of two.

9. The power device according to claim 1, wherein the output shaft has a first end far from the motor body in an extending direction of the output shaft, the first end is provided with a receiving hole, and the first bearing is embedded in the receiving hole.

10. The power plant of claim 1, further comprising a second bearing connected between the output shaft and the housing;

the second bearing forms a second resistance between the output shaft and the housing, the first bearing and the connecting piece form a first resistance between the output shaft and the housing, and the second resistance is greater than the first resistance.

11. The power device of claim 1, wherein the motor includes a rotor and a stator sleeved outside the rotor, the stator is fixedly connected to the housing, and the rotor is fixedly connected to the output shaft and drives the output shaft to rotate.

12. A vehicle, characterized in that the vehicle comprises a power plant according to any one of claims 1-11.

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