CN214984619U

CN214984619U - Power rear axle device

Info

Publication number: CN214984619U
Application number: CN202120537990.8U
Authority: CN
Inventors: 杨春卫
Original assignee: Beijing Topsroboteer Technology Co ltd
Current assignee: Beijing Topsroboteer Technology Co ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-12-03
Anticipated expiration: 2031-03-15

Abstract

The utility model provides a power rear axle device relates to electric motor car technical field, including drive arrangement, transition axle and speedtransmitter, drive arrangement includes motor and electromagnetic braking ware, electromagnetic braking ware is used for right the motor is brakied, the through-hole has been seted up on electromagnetic braking ware's the end cover, the transition axle passes the through-hole, the one end of transition axle with the non-drive end of the motor shaft of motor is connected, the other end of transition axle with speedtransmitter passes through the connector and connects. The utility model discloses install speedtransmitter on one end of transition axle, the running speed that can real-time supervision motor to on the signal transmission to the controller of power rear axle with speedtransmitter collection, and then carry out feedback closed-loop control to the motor, thereby satisfy the demand of many equipment.

Description

Power rear axle device

Technical Field

The utility model relates to an electric motor car technical field, concretely relates to power rear axle device.

Background

With the progress of society and the development of science and technology, the rapid development of various vehicles and the appearance of the scooter for the old, the problem of inconvenience of the old is greatly solved, and the convenience of the travel of the old is greatly improved.

At present, the structure of the power rear axle for the old-age scooter industry on the market generally comprises an output shaft, a gear reducer, a differential mechanism, a motor and an electromagnetic brake at the tail end of the motor, particularly the electromagnetic brake with the power-off suction characteristic, and can lock the motor shaft after the system is powered off to prevent accidents.

However, it is sometimes necessary to modify such a rear axle to apply mechanical connection and electrical connection to multiple devices, such as multiple cars of a train, so as to meet the requirement that one person can control a first device to control other devices connected in series to safely move forward together. Therefore, in order to meet this demand, a power rear axle device needs to be designed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a power rear axle device to satisfy many equipment safety control and the demand that moves ahead.

The utility model provides a pair of power rear axle device, including drive arrangement, transition axle and speedtransmitter, drive arrangement includes motor and electromagnetic braking ware, electromagnetic braking ware is used for right the motor brakes, the through-hole has been seted up on electromagnetic braking ware's the end cover, the transition axle passes the through-hole, the one end of transition axle with the non-drive end of the motor shaft of motor is connected, the other end of transition axle with speedtransmitter passes through the connector and connects.

Further, the motor shaft, the transition shaft, the through hole and the speed sensor are coaxially arranged.

Further, the connector is a coupling.

Further, the transition shaft is connected with the non-driving end of the motor shaft through a micro motor coupler, and the micro motor coupler is a metal spiral spring coupler or a corrugated pipe coupler.

Further, the speed sensor is a photoelectric encoder, a magnetic encoder or a rotary transformer.

Further, still include the sealing washer, the transition axle with be equipped with the sealing washer between the through-hole, the material of sealing washer is polyimide.

Further, still include gear reducer, differential mechanism, left half axle and right half axle are located same axis, differential mechanism is located between left half axle and the right half axle, the motor is installed one side of gear reducer's casing.

Furthermore, an output shaft of the motor is connected with the gear reducer through a first gear, an output end of the gear reducer is connected with the differential through a second gear, and the differential is respectively connected with the left half shaft and the right half shaft through a third gear; the motor drives the left half shaft and the right half shaft respectively through the gear reducer and the differential mechanism.

Further, the speed sensor is electrically connected with the controller.

Further, the controller is electrically connected to the motor.

The utility model provides a pair of power rear axle device has following beneficial effect:

the utility model discloses in, set up the transition axle through the non-drive end at the motor shaft of motor, install speed sensor on one end of transition axle, the running speed that can real-time supervision motor to on the signal transmission to the controller of power rear axle with speed sensor collection, and then carry out feedback closed-loop control to the motor. When many equipment, every equipment is provided with the utility model discloses a power rear axle and controller. The first equipment can simultaneously transmit the speed instruction to other equipment, and after all the equipment receive the same speed instruction, a plurality of pieces of equipment simultaneously operate, so that mutual extrusion of mechanical connection among a plurality of pieces of equipment cannot be caused. Therefore, the requirements of safety control and forward movement of multiple devices are met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a power rear axle device according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of one configuration of a transition shaft in the powered rear axle assembly shown in FIG. 1;

FIG. 3 is a schematic structural view of a seal arrangement in the powered rear axle assembly shown in FIG. 1;

fig. 4 is a schematic diagram of a transmission process in the powered rear axle assembly of fig. 1.

In the figure:

10-a drive device; 11-a motor; 12-an electromagnetic brake; 13-end cap; 20-a transition shaft; 30-a speed sensor; 31-a connector; 40-a micro motor coupling; 50-sealing ring; 51-a sealing sleeve; 52-a reinforcement; 53-spring coils; 60-an output shaft; 61-a first gear; 62-a gear reducer; 63-a second gear; 64-a differential; 65-a third gear; 70-left half shaft; 71-right half shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "mounted" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Fig. 1 is a schematic structural diagram of a power rear axle device according to an embodiment of the present invention; FIG. 2 is a schematic illustration of one configuration of a transition shaft in the powered rear axle assembly shown in FIG. 1; FIG. 3 is a schematic structural view of a seal arrangement in the powered rear axle assembly shown in FIG. 1; fig. 4 is a schematic diagram of a transmission process in the powered rear axle assembly of fig. 1.

As shown in fig. 1, the embodiment of the utility model provides a pair of power rear axle device, including drive arrangement 10, transition axle 20 and speedtransmitter 30, drive arrangement 10 includes motor 11 and electromagnetic braking ware 12, and electromagnetic braking ware 12 is used for brakieing motor 11, has seted up the through-hole on electromagnetic braking ware 12's the end cover 13, and transition axle 20 passes the through-hole, and the one end of transition axle 20 is connected with the non-drive end of motor shaft of motor 11, and the other end and the speedtransmitter 30 of transition axle 20 pass through connector 31 and are connected.

After the motor 11 is connected with a power supply, the electromagnetic brake 12 is separated from the armature end cover under the action of electromagnetic attraction, and the motor 11 starts to operate. When the power supply is cut off, the electromagnetic brake 12 loses the magnetic attraction force, the spring pushes the armature to press the brake disc, and the motor 11 stops moving immediately under the action of the friction torque.

As shown in fig. 2, on the basis of the above-mentioned embodiment, further, in order to ensure the stability and accuracy of the operation of the speed sensor 30, the motor shaft, the transition shaft 20 and the speed sensor 30 are coaxially arranged.

In the present embodiment, the speed sensor 30 is a photoelectric encoder, a magnetic encoder, or a resolver.

Meanwhile, in order to ensure the reliability of the speed sensor 30 in operation, a connector 31 needs to be installed between the transition shaft 20 and the speed sensor 30, and the connector 31 is a coupling.

In particular, it may be an encoder coupler, such as an aluminum alloy encoder coupler or a stainless steel encoder coupler. The encoder coupler is usually small in size, the clockwise rotation characteristic and the anticlockwise rotation characteristic are the same, and after the encoder coupler is installed, maintenance is basically not needed, and the encoder coupler is convenient to install.

Optionally, the shaft can be elastically and flexibly connected, such as a plate spring, so that damage to the shaft system and the code wheel of the encoder caused by the shaft movement and jumping can be avoided.

Alternatively, the connector 31 may be other means for fixing the speed sensor 30, such as a mounting plate, a magnet block, or the like.

It should be noted that the specific fixing manner is determined according to the type of the specific speed sensor 30, and the above-mentioned fixing manner is only an option.

Preferably, the transition shaft 20 is integrally manufactured with the motor shaft in order to ensure overall coaxiality.

Alternatively, to ensure stability, versatility and convenience of mounting the transition shaft 20 to the motor shaft, the transition shaft 20 is coupled to the non-drive end of the motor shaft by a micro-motor coupling 40.

Because of manufacturing and installation errors, relative offset is inevitably generated between two shafts connected by the coupling, and therefore the coupling should have certain capability of compensating the offset of the two shafts so as to eliminate or reduce additional load caused by the relative offset and improve transmission performance. In order to reduce the vibration of the mechanical transmission system, the coupling should also have certain damping performance. Therefore, in the present embodiment, the micro-motor coupling 40, such as a metal coil spring coupling or a diaphragm coupling, is used to connect the transition shaft 20 to the non-driving end of the motor shaft. The micro motor coupler 40 is convenient to disassemble, assemble and maintain.

As shown in fig. 3, in addition to the above embodiment, a seal ring 50 is further provided between the transition shaft 20 and the through hole, and the material of the seal ring 50 is polyimide.

In the present embodiment, the end cover 13 at the end of the electromagnetic brake 12 is provided with a through hole. Therefore, in order to ensure the overall sealing performance and the dust-proof performance of the motor 11, a seal ring 50 is provided between the transition shaft 20 and the through hole. The polyimide seal ring 50 has the advantages of excellent high insulation, wear resistance, self-lubrication, high temperature resistance and the like.

Optionally, the through-hole seal arrangement includes a seal sleeve 51, a reinforcement 52 and a spring ring 53. The reinforcement 52 serves to reinforce the strength of the overall seal structure; an embedded groove is formed in the outer wall of the end part of the sealing sleeve 51, and a spring ring 53 is installed in the embedded groove; the inner wall of the end of the sealing sleeve 51 is provided with a mounting groove for mounting the sealing ring 50.

The end part of the sealing sleeve 51 is tightened by the spring ring 53, so that the sealing sleeve 51 is tightly attached to the transition shaft 20, and the sealing ring 50 in the mounting groove ensures the dustproof performance of the motor 11.

Alternatively, the sealing sleeve 51 may be provided with mounting holes, which are bolted to the end cap 13 of the electromagnetic brake end.

As shown in fig. 4, in addition to the above embodiment, the rear axle device further includes a gear reducer 62, a differential 64, a left axle 70 and a right axle 71, the left axle 70 and the right axle 71 are located on the same axis, the differential 64 is located between the left axle 70 and the right axle 71, and the motor 11 is mounted on one side of the housing of the gear reducer 62.

An output shaft 60 of the motor 11 is connected to a gear reducer 62 through a first gear 61, an output end of the gear reducer 62 is connected to a differential 64 through a second gear 63, and the differential 64 is connected to a left axle shaft 70 and a right axle shaft 71 through a third gear 65. The motor 11 drives the left half shaft 70 and the right half shaft 71 respectively through the gear reducer 62 and the differential 64.

In the present embodiment, the output shaft 60 of the motor 11 is fixedly connected to the driving end of the transmission, that is, the output shaft 60 of the motor 11 and the gear reducer 62 are driven by a first gear, the output end of the gear reducer 62 is connected to the differential 64 by a second gear, and the left half-shaft 70 and the right half-shaft 71 are connected between the differential 64 and the wheel hub respectively.

Alternatively, one end of the left half shaft 70 and one end of the right half shaft 71 can be fixedly connected with the output end of the differential 64 through splines, and the other end is rigidly connected with the wheel hub.

When the equipment runs, the motor 11 outputs power, the power is transmitted to the differential 64 after passing through the gear reducer 62, and then the power is transmitted to the left half shaft 70, the right half shaft 71 and the wheel hubs which are rigidly connected with the left half shaft and the right half shaft by the differential 64, so that the wheels fixed on the wheel hubs are driven to rotate, and the equipment runs normally.

The power rear axle integrates the motor 11, the gear reducer 62, the differential 64 and the rear axle into a whole, and has the advantages of compact and simple structure, low manufacturing cost and convenient maintenance. Differential 64 solves the differential problem and makes the device more robust.

On the basis of the above embodiment, further, the power rear axle device further includes a controller, the controller is electrically connected to the speed sensor 30, and the controller is electrically connected to the motor 11.

In the present embodiment, the controller of the rear axle device can not only collect signals from the speed sensor 30, but also perform closed-loop control on the speed of the motor 11 through a built-in microprocessor by means of a closed-loop control algorithm.

Specifically, the controller of the present embodiment has a speed sensor interface for the controller to communicate with a speed sensor. In addition, the controller is also provided with a power supply input interface for providing the required power supply for the controller; the electromagnetic brake interface is used for controlling the action of the electromagnetic brake 12 and realizing the braking of the motor 11; the motor phase line interface is used for electrically connecting the controller with the phase line of the motor; these interfaces are compatible with existing powered rear axle controllers.

In addition, the controller also comprises a motor winding temperature sensor interface which is used for monitoring the temperature of the motor winding in real time, ensuring the safe operation of the motor 11 and protecting the motor 11; the mechanical brake signal input interface is used for responding and processing a mechanical brake signal; and the control signal input interface is used for carrying out on-off control on a control power supply of the controller and carrying out instruction communication with the controller.

When a plurality of devices are provided, each device can be provided with the power rear axle and the controller of the embodiment to ensure that the speed instruction of the first device can be transmitted to other devices at the same time. After all the devices receive the same speed instruction, the closed-loop control of the speed can be accurately realized, and when a plurality of devices operate simultaneously, the mutual extrusion of mechanical connection among the devices cannot be caused.

To sum up, the utility model discloses in, set up transition axle 20 through the non-drive end at the motor shaft of motor 11, install speedtransmitter 30 on one end of transition axle 20, can real-time supervision motor 11's operating speed to on the signal transmission to the controller of power rear axle with speedtransmitter 30 collection, and then carry out feedback closed-loop control to motor 11, thereby satisfy the demand of many equipment, realize promptly that the first main equipment of control just can control the purpose that other equipment of establishing ties go forward together.

The above description is only a preferred 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. The utility model provides a power rear axle device, characterized in that, includes drive arrangement (10), transition axle (20) and speed sensor (30), drive arrangement (10) are including motor (11) and electromagnetic braking ware (12), electromagnetic braking ware (12) are used for right motor (11) brake, the through-hole has been seted up on end cover (13) of electromagnetic braking ware (12), transition axle (20) pass the through-hole, the one end of transition axle (20) with the non-drive end of the motor shaft of motor (11) is connected, the other end of transition axle (20) with speed sensor (30) pass through connector (31) and are connected.

2. The powered rear axle arrangement according to claim 1, characterized in that the motor shaft, the transition shaft (20), the through hole and the speed sensor (30) are arranged coaxially.

3. The powered rear axle arrangement according to claim 1, characterized in that the connector (31) is a coupling.

4. The powered rear axle arrangement according to claim 1, characterized in that the transition shaft (20) is connected to the non-drive end of the motor shaft of the motor (11) by a micro motor coupling (40), the micro motor coupling (40) being a metal coil spring coupling or a bellows coupling.

5. The powered rear axle arrangement according to claim 1, characterized in that the speed sensor (30) is a photoelectric encoder, a magnetic encoder or a rotary transformer.

6. The powered rear axle device according to claim 1, further comprising a sealing ring (50), wherein the sealing ring (50) is arranged between the transition shaft (20) and the through hole, and the sealing ring (50) is made of polyimide.

7. The powered rear axle arrangement according to claim 1, further comprising a gear reducer (62), a differential (64), a left half-shaft (70) and a right half-shaft (71), said left half-shaft (70) and said right half-shaft (71) being located on the same axis, said differential (64) being located between said left half-shaft (70) and said right half-shaft (71), said electric motor (11) being mounted on one side of a housing of said gear reducer (62).

8. The powered rear axle arrangement according to claim 7, characterized in that the output shaft (60) of the electric machine (11) is connected to the gear reduction unit (62) via a first gear (61), the output of the gear reduction unit (62) is connected to the differential (64) via a second gear (63), the differential (64) being connected to the left axle shaft (70) and the right axle shaft (71) via a third gear (65), respectively; the motor (11) drives the left half shaft (70) and the right half shaft (71) through the gear reducer (62) and the differential (64).

9. The powered rear axle arrangement according to claim 1, further comprising a controller electrically connected with the speed sensor (30).

10. The powered rear axle arrangement according to claim 9, characterized in that the controller is electrically connected with the electric motor (11).