CN218616197U - Power system and vehicle - Google Patents

Abstract

The application provides a power system and a vehicle. The power system comprises a speed reducer, a motor, a stop block, an elastic piece and a support block, wherein the first end of a motor shaft is connected with an input shaft of the speed reducer, the stop block is arranged on any one of the motor shaft and the input shaft of the speed reducer, and the elastic piece and the support block are arranged on the power system. The motor shaft still includes the second end that sets up with first end is relative, and backstop piece act on respectively at the first end and the second end of motor shaft, have restricted the motor shaft and received the moving distance of axial force to first end and second end, and the backstop piece is used for restricting the radial movement of the axial first end of motor, has avoided the motor shaft to deviate its operating position, has impacted the motor shaft damage that the motor shaft leads to the moving distance of first end and second end is too big even. The abutting part is used for compressing the elastic part and limiting the moving distance of the motor shaft, the problem that the elastic part loses elasticity due to the fact that the elastic part exceeds the maximum deformation value is avoided, and the service life of the elastic part is prolonged.

Description

Power system and vehicle

Technical Field

The present disclosure relates to a vehicle power system, and more particularly to a power system and a vehicle having the same.

Background

At present, new energy automobiles develop more rapidly, and compared with internal combustion engines used by traditional vehicles, electric motors used by the new energy automobiles have higher requirements. In a main flow power system in the market at present, when a motor shaft works, axial force is provided for the motor shaft, so that the axial distance of the motor shaft moves greatly under the action of the axial force, and the movement of the motor shaft cannot be controlled due to an unlimited structure of the motor shaft, so that the motor shaft deviates from the working position of the motor shaft, and the service life of parts and the working efficiency are reduced.

SUMMERY OF THE UTILITY MODEL

The application provides a power system, including limit structure, solve the interior unlimited structure of motor shaft of power system, make its skew operating position to cause the problem that motor efficiency descends and spare part life-span is short.

In order to solve the technical problem, the power system provided by the application comprises a speed reducer and a motor, wherein the speed reducer comprises a speed reducer input shaft, the motor comprises a motor shaft, and the first end of the motor shaft is connected with the speed reducer input shaft. And a stop block is arranged on any one of the motor shaft and the input shaft of the speed reducer, and the power system further comprises an elastic piece and a stop piece. The motor shaft further comprises a second end opposite to the first end, the motor shaft moves towards the first end along the axial direction of the motor shaft to be capable of being abutted against the stop block, the motor shaft moves towards the second end along the axial direction of the motor shaft to compress the elastic piece, and the motor shaft can move to be abutted against the abutment block. Wherein, the stroke that the motor axle moved to the second end is less than the maximum deflection of elastic component.

Specifically, the power system further comprises a shell, and the speed reducer and the motor are arranged in the shell. The inner wall of the shell is provided with a first groove and a second groove, the first groove penetrates through the inner wall of the shell, the second groove is communicated with the first groove, the inner diameter of the first groove is larger than that of the second groove, and the abutting part is a step at the joint of the first groove and the second groove. The elastic piece is installed in the second groove, part of the elastic piece extends into the first groove, the second end of the motor shaft is installed in the first groove, and the motor shaft moves towards the second end along the axial direction of the motor shaft to be capable of being abutted against the step and compressing the elastic piece.

Specifically, the distance from the end face of the second end of the motor shaft to the step is greater than the maximum compression deformation amount of the elastic member.

Specifically, a first bearing is fixedly arranged at the second end of the motor shaft, and the first bearing moves towards the second end along the axial direction of the motor shaft to be stopped at the step.

Specifically, the housing includes a first housing, a second housing, and a third housing. The first shell is connected with the second shell, and the first shell and the second shell form a speed reducer box body for accommodating the speed reducer together. The third shell is connected with the second shell, and the third shell and the second shell form a motor box body for accommodating the motor. The motor shaft penetrates through the motor box body and extends into the speed reducer box body to be connected with the input shaft of the speed reducer, and the first groove and the second groove are arranged in the motor box body.

Specifically, a second bearing is further arranged in the speed reducer box, and the speed reducer input shaft is mounted on the second bearing.

Specifically, be equipped with a mounting groove on the first casing, be equipped with one on the second casing and run through reduction gear box with the logical groove of motor box, the mounting groove with lead to the relative, and with high setting of groove. The number of the second bearings is two, the two second bearings are respectively installed in the through grooves of the installation groove box, and the motor shaft penetrates through the through grooves to be connected with the input shaft of the speed reducer.

Specifically, the input shaft of the speed reducer is a hollow shaft and comprises a hollow passage. The first end of motor shaft install connect in the hollow channel. The stopping block is arranged on the motor shaft, and moves towards the first end along with the motor shaft along the axial direction of the motor shaft to stop the end face of the input shaft of the speed reducer.

Specifically, an internal spline is arranged in the hollow channel, and an external spline is arranged on the motor shaft. The internal spline and the external spline are mutually matched to install and connect the motor shaft in the hollow channel.

Another technical scheme that this application proposed is: there is provided a vehicle including a powertrain as claimed in any one of the above.

The beneficial effect of this application is: compare in current driving system, driving system that this application provided includes reduction gear and motor, and the reduction gear includes the reduction gear input shaft, and the motor includes the motor shaft, and the first end and the reduction gear input shaft of motor shaft are equipped with the backstop piece on any one of motor shaft and reduction gear input shaft, and driving system still includes the elastic component and supports and keep off the piece. The motor shaft also comprises a second end opposite to the first end, the motor shaft moves to the first end along the axial direction of the motor shaft to be capable of being abutted against the stop block, and the stop block is used for limiting the radial movement of the first end of the motor shaft in the axial direction. The motor shaft moves to the second end along the axial direction of the motor shaft until the motor shaft can be resisted by the resisting piece, and the resisting piece is used for limiting the moving distance of the motor shaft to the second end. Therefore, the stop block and the stop piece are respectively applied to the first end and the second end of the motor shaft, the moving distance of the motor shaft towards the first end and the second end under the action of axial force is limited, the motor shaft is prevented from deviating from the working position, and even the motor shaft is prevented from being damaged due to overlarge moving distance towards the first end and the second end and caused by impact on the motor shaft. And, the motor shaft compresses the elastic component along its axial to the in-process of second end removal for the elastic component has an axial thrust to the motor shaft, has avoided the motor shaft vibration. In addition, the stroke that the motor axial second end moved is less than the maximum deflection of elastic component, that is to say, when the second end moved to keep out in keeping out the piece, the elastic component had not reached the maximum deflection value of elastic component yet, had avoided the elastic component to exceed the problem of the loss elasticity that the maximum deflection value leads to, and then has prolonged the life of elastic component.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive effort, wherein:

FIG. 1 is a cross-sectional view of one embodiment of a power system provided herein;

fig. 2 is a partially enlarged structural view of a circle I in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without making any creative effort based on the embodiments in the present application belong to the protection scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present application can be understood as specific cases by those of ordinary skill in the art.

Referring to fig. 1, fig. 1 is a cross-sectional view of an embodiment of a power system provided in the present application. In one aspect of the present application, a power system is provided. In one embodiment, the power system includes a speed reducer 1 and a motor 2, the speed reducer 1 includes a speed reducer input shaft 40, the motor 2 includes a motor shaft 50, a first end 501 of the motor shaft 50 is connected with the speed reducer input shaft 40, a stop block 52 is disposed on any one of the motor shaft 50 and the speed reducer input shaft 40, and the power system further includes an elastic member 90 and a stop member 33. The motor shaft 50 further includes a second end 502 disposed opposite to the first end 501, the motor shaft 50 moves along the axial direction toward the first end 501 to abut against the stop block 52, and the stop block 52 is used for limiting the moving direction of the motor shaft 50. The motor shaft 50 moves along the axial direction toward the second end 502 to abut against the stopper 33, and the stopper 33 is used for limiting the moving distance of the motor shaft 50 and compressing the elastic member 90. Wherein, the stroke of the motor shaft 50 moving towards the second end 502 is less than the maximum deformation of the elastic member 90.

In the power system of the present application, the motor shaft 50 moves along the axial direction thereof toward the first end 501 to be capable of abutting against the stop block 52; the motor shaft 50 moves along the axial direction thereof toward the second end 502 to be capable of resisting against the stopper 33; the stop block 52 and the stop member 33 can limit the moving distance of the motor shaft to the first end 501 and the second end 502, so as to avoid the motor shaft 50 from deviating from the working position, and even the motor shaft 50 is damaged due to the impact of the excessive moving distance of the motor shaft to the first end 501 and the second end 502. Moreover, the elastic member 90 is compressed during the movement of the motor shaft 50 toward the second end 502 along the axial direction thereof, so that the elastic member 90 has an axial pushing force on the motor shaft 50, thereby preventing the motor shaft 50 from vibrating. In addition, the moving stroke of the motor shaft 50 toward the second end 502 is less than the maximum deformation amount of the elastic member 90, that is, when the second end 502 moves to abut against the abutting member 33, the elastic member 90 does not reach the maximum deformation value of the elastic member 90, so that the problem of elasticity loss caused by the fact that the elastic member 90 exceeds the maximum deformation value is avoided, and the service life of the elastic member 90 is further prolonged.

In one specific embodiment, the stop block 52 and the stop member 33 are disposed at the first end 501 and the second end 502 of the motor shaft 50, respectively, for limiting the movement of the motor shaft 50 under the axial force.

Continuing with fig. 2, fig. 2 is a schematic diagram of a partial enlarged structure of circle I in fig. 1. Specifically, in one embodiment, the power system further includes a housing 3, wherein the reducer 1 and the motor 2 are both disposed within the housing 3. The inner wall of the housing 3 is provided with a first groove 31 and a second groove 32, the first groove 31 penetrates the inner wall of the housing 3, and the second groove 32 communicates with the first groove 31. The inner diameter of the first groove 31 is larger than that of the second groove 32, and the stop 33 is a step 33 at the intersection of the first groove 31 and the second groove 32. It can be understood that the step-shaped stop member 33 formed by the height difference between the first groove 31 and the second groove 32 can be more suitable for the moving path and size of the motor shaft 50 than the separate stop member 33 provided inside the housing 3, and since the stop member 33 is a groove recessed at one end of the housing 3, it cooperates with the stop block 52 to a certain extent when the motor shaft 50 moves, so as to limit the axial displacement of the motor shaft 50 and prevent the motor shaft 50 from shifting due to the axial force when the power system operates. The elastic member 90 is installed in the second groove 32, part of the elastic member 90 extends into the first groove 31, the second end 502 of the motor shaft 50 is installed in the first groove 31, and the motor shaft 50 moves along the axial direction thereof toward the second end 502 to abut against the step 33 and compress the elastic member 90. When the power system normally works, the motor shaft 50 continuously presses the elastic member 90 in the second groove 32, and the elastic member 90 is in a compressed state, so as to provide an elastic force towards the first end 501 for the motor shaft 50, provide an axial pretightening force for the motor shaft 50, and eliminate a virtual position of the motor 2, thereby inhibiting an axial movement trend of the motor shaft 50.

Specifically, in one embodiment, the distance from the end surface of the second end 502 of the motor shaft 50 to the step 33 is greater than the maximum compression deformation amount of the elastic member 90, so that the elastic member 90 can be accommodated in the second groove 32 and has an elastic force on the motor shaft 50. The compression set of the elastic member 90 can be adjusted or replaced as needed under certain conditions, so that the power system can be adapted to a variety of conditions.

In another embodiment, the stop 33 may also be formed by two protrusions spaced apart from each other on the housing 3, and the motor shaft 50 moves along the axial direction thereof toward the second end 502 to stop against the two protrusions. The elastic member 90 is installed between the two protrusions, and a portion of the elastic member 90 extends to the outside of the two protrusions. The distance from the end surface of the second end 502 of the motor shaft 50 to the end surfaces of the two protrusions is greater than the maximum compression deformation amount of the elastic member 90.

To ensure smooth rotation of the motor shaft 50, with continued reference to fig. 2, in one embodiment, the second end 502 of the motor shaft 50 is fixedly provided with a first bearing 80. The first bearing 80 moves with the motor shaft 50 along its axial direction toward the second end 502 to stop at the step 33 for taking up the rotation of the motor shaft 50. A certain gap is formed between the first bearing 80 and the step 33, the length of the gap can be set to a, generally, the value of a is far smaller than the height of the elastic member 90, so that the elastic member is ensured to be kept in a certain compression state at the step 33, the elastic force towards the first end 501 is provided for the first bearing 80, and further, a necessary axial force is provided for the motor shaft 50, and the value of a can be adjusted according to the precision and the operation requirements of the power system, so that the power system can be suitable for various requirements.

With continued reference to fig. 1, the present application further contemplates an improvement to the housing 3 of the powertrain described above. Specifically, in one embodiment, the housing 3 includes a first housing 10, a second housing 20, and a third housing 30, the first housing 10 and the second housing 20 are connected, and the first housing 10 and the second housing 20 together form a gear box 100 that houses the gear 1. The third casing 30 is connected to the second casing 20, and the third casing 30 and the second casing 20 together form a motor case 200 accommodating the motor 2. Compared with the power system in the prior art, the independent speed reducer 1 and the motor 2 are connected together, the power system assembly is arranged in one structure through the three-side shell, namely one side of the shell is structurally reduced in the motor box body 200, the integrated effect of the speed reducer 1 and the motor 2 is enhanced while the weight of the whole power system is reduced, and the size of the power system is reduced. The first bearing 80 is installed in the third housing 30, and is stopped at the step 33.

Specifically, in one embodiment, a second bearing 60 is further disposed within the reducer case 100, and the reducer input shaft 40 is mounted on the second bearing 60. The first groove 31 and the second groove 32 are both provided in the motor case 200. A second bearing 60 is also provided on the second housing 20 within the reducer case 100 to bear the rotation of the reducer input shaft 40 in the powertrain and generate torque. The first bearing 80 and the second bearing 60 fix the reducer input shaft 40 and the motor shaft 50 so that the two can only rotate and control the axial and radial movement of the reducer input shaft 40 and the motor shaft 50 while reducing the friction coefficient of the reducer input shaft 40 and the motor shaft 50 in the movement process and ensuring the rotation precision of the reducer input shaft and the motor shaft.

To connect the input shaft 40 and the motor shaft 50 of the reducer together, with continued reference to fig. 1, in a specific embodiment, the first housing 10 is provided with a mounting slot 101, and the second housing 20 is provided with a through slot 201 extending through the reducer casing 100 and the motor casing 200. The installation groove 101 and the through groove 201 are arranged relatively and at the same height, so that the speed reducer input shaft 40 and the motor shaft 50 can be connected at the same height, and the problem of reduction of transmission efficiency due to the fact that an adapter is used under the condition that height difference exists or direct connection cannot be achieved is solved. In some specific embodiments, the second bearing 60 includes two, and the two second bearings 60 are respectively installed in the installation groove 101 and the through groove 201, and the motor shaft 50 is connected to the reducer input shaft 40 through the through groove 201. The second bearing 60 located in the through slot 201 controls both the reducer input shaft 40 and the motor shaft 50, supporting the rotation of the two shafts when the power system is in operation, ensuring the transmission action between the reducer input shaft 40 and the motor shaft 50.

Specifically, in one embodiment, the reducer input shaft 40 is a hollow shaft, including a hollow passage (not shown). The hollow shaft is small in size and light in weight, can keep stable transmission during transmission, is less influenced by inertia due to light weight, is high in movement precision and is low in noise during high-speed rotation. The first end 501 of motor shaft 50 is the erection joint in hollow channel, stopper 52 sets up on the motor shaft, stopper 52 along with motor shaft 50 along its axial to first end 501 move to the terminal surface of backstop in reduction gear input shaft 40, stopper 52 contacts with motor shaft 50 and reduction gear input shaft 40 simultaneously this moment, because motor shaft 50 erection joint is in the hollow channel of reduction gear input shaft 40, when stopper 52 carries out radial position removal to motor shaft 50 this moment, carry out radial spacing to reduction gear input shaft 40 in step, the inside axial driven position stability of driving system has wholly been guaranteed, the transmission efficiency of driving system has further been guaranteed.

To achieve the connection and transmission between the reducer input shaft 40 and the motor shaft 50, in a specific embodiment, please continue to refer to fig. 1, an internal spline (not shown) is disposed in the hollow passage, an external spline 51 is disposed on the motor shaft 50, and the internal spline and the external spline 51 cooperate to mount the motor shaft 50 in the hollow passage. Because the number of teeth of contact between the splines is more, the total contact area is larger, the stress is more uniform in the connection between the motor shaft 50 and the input shaft 40 of the speed reducer, and when transmission is carried out, larger load can be borne, the service lives of the motor shaft 50 and the input shaft 40 of the speed reducer are prolonged to a certain extent, the guidance performance is good, and the transmission efficiency of the whole power system can be improved.

In another aspect of the application, a vehicle is also provided, and the vehicle comprises the power system of any one of the embodiments. Therefore, the vehicle of the present application also has all the advantages of the power system, which will not be described in detail herein.

In the description of the present application, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like is intended to mean that a particular feature, mechanism, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, mechanisms, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure, which are directly or indirectly applied to other related technical fields, are included in the scope of the present disclosure.

Claims (10)

1. A power system comprises a speed reducer and a motor, wherein the speed reducer comprises a speed reducer input shaft, the motor comprises a motor shaft, and the first end of the motor shaft is connected with the speed reducer input shaft;

the power system also comprises an elastic piece and a stop piece;

the motor shaft further comprises a second end opposite to the first end, and the motor shaft moves towards the first end along the axial direction of the motor shaft to be capable of abutting against the stop block;

the motor shaft moves towards the second end along the axial direction of the motor shaft to compress the elastic piece, and the motor shaft can move to be abutted against the abutting piece; wherein, the stroke that the motor axle moved to the second end is less than the maximum deflection of elastic component.

2. The power system of claim 1, further comprising a housing, the speed reducer and the electric machine both being disposed within the housing;

the inner wall of the shell is provided with a first groove and a second groove, the first groove penetrates through the inner wall of the shell, and the second groove is communicated with the first groove;

the inner diameter of the first groove is larger than that of the second groove, and the stop piece is a step at the joint of the first groove and the second groove;

the elastic piece is arranged in the second groove, and part of the elastic piece extends into the first groove;

the second end of the motor shaft is installed in the first groove, and the motor shaft moves towards the second end along the axial direction of the motor shaft to be capable of resisting the step and compressing the elastic piece.

3. The power system as claimed in claim 2, wherein a distance from the end surface of the second end of the motor shaft to the step is greater than a maximum compression deformation amount of the elastic member.

4. The power system as claimed in claim 2, wherein a first bearing is fixedly provided at the second end of the motor shaft;

the first bearing moves along with the motor shaft along the axial direction of the motor shaft to the second end to stop at the step.

5. The power system of claim 2, wherein the housing comprises a first housing, a second housing, and a third housing;

the first shell is connected with the second shell, and the first shell and the second shell form a speed reducer box body for accommodating the speed reducer together;

the third shell is connected with the second shell, and the third shell and the second shell form a motor box body for accommodating the motor;

the motor shaft penetrates through the motor box body and extends into the speed reducer box body to be connected with the input shaft of the speed reducer;

the first groove and the second groove are arranged in the motor box body.

6. The power system as claimed in claim 5, wherein a second bearing is further arranged in the speed reducer box;

the input shaft of the speed reducer is arranged on the second bearing.

7. The power system according to claim 6, wherein the first housing is provided with a mounting groove, and the second housing is provided with a through groove penetrating through the reducer case and the motor case;

the mounting groove and the through groove are opposite and arranged at the same height;

the second bearings are respectively arranged in the through grooves of the mounting groove box, and the motor shaft penetrates through the through grooves to be connected with the input shaft of the speed reducer.

8. The powertrain system of any of claims 1-7, wherein the retarder input shaft is a hollow shaft comprising a hollow channel;

the first end of the motor shaft is installed and connected in the hollow channel;

the stop block is arranged on the motor shaft, and moves along with the motor shaft to the first end along the axial direction of the motor shaft until the stop block stops at the end surface of the input shaft of the speed reducer.

9. The power system of claim 8, wherein internal splines are provided in the hollow passage;

an external spline is arranged on the motor shaft;

the internal spline and the external spline are mutually matched to mount and connect the motor shaft in the hollow channel.

10. A vehicle comprising a powertrain according to any one of claims 1 to 9.

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