CN201142616Y - Electric wheel hub motor - Google Patents

Abstract

A hub motor of an electric vehicle comprises a hub shell body, an end cover, a speed reducing mechanism and a motor component. The motor component comprises a stator and a rotor; the rotor is accommodated in the stator; one end of the stator is closed by the end cover of the stator; the outside of the end cover of the stator is fixedly connected with a left half shaft; the left half shaft penetrates out of the left end cover from the center; the other end of the stator is connected with a speed reducer base; and the end cover of the stator, the stator and the speed reducer base are fixedly connected into a whole body by bolts. A central hole and a planetary gear which is symmetrical to the central hole are formed on the speed reducer base, the output end of the rotor penetrates the central hole to be meshed with the planetary gear, the left end cover and the right end cover are fixedly connected with the hub shell body to surround the motor and the speed reducing mechanism. The hub motor is characterized by reasonable structure, stable performance, reasonable maintenance mode and long service life.

Description

Electric wheel hub motor

technical field

The utility model relates to an electric wheel hub motor.

Background technique

The electric wheel hub has gradually evolved from the earliest brushed motor to the currently widely used brushless motor, and the brushless motor has gradually developed from the previous direct drive of the motor, and the current drive is driven by the reduction mechanism to increase the output torque; such as the Chinese Patent Announcement No. It is: an electric hub motor of CN1937363. This hub motor is composed of a hub shell, a motor, a reducer and a clutch. The motor, reducer and clutch are arranged in sequence and arranged coaxially. The main shaft is connected to the hub shell through a bearing. The motor transmits power to the clutch through the reducer at a high torque and low speed, and drives the hub shell to rotate through the clutch to drive the electric vehicle. The hub motor of this electric vehicle has a large output torque, low power consumption, and low heat generation. The working performance is stable, but because the internal parts are not tightly matched, there is uneven force between the parts, the noise increases after a period of use, the inner wear of the hub is serious, and the service life is not long; The components are closely connected. Once one of the components is damaged, the entire hub needs to be disassembled for repair. Even after the repair, the overall performance of the hub motor will drop significantly.

Utility model content

The purpose of the utility model is to provide a wheel hub motor of an electric vehicle. The main shaft of the motor is divided into two sections, and the components inside the motor are combined in a modular manner, which has the characteristics of reasonable structure, stable performance, maintenance mode and long service life.

The utility model is achieved in that:

An electric wheel hub motor, including a hub shell, an end cover, a speed reduction mechanism and a motor component, the motor component includes a stator and a rotor, and the rotor is accommodated in the stator, and it is characterized in that: one end of the stator is closed by the stator end cover , the outer side of the stator end cover is fixedly connected with the left half shaft, and the inner side is provided with a central blind hole, the left half shaft passes through the center of the left end cover, the other end of the stator is connected with the reducer seat, the stator end cover, the stator and the reducer seat The three are fixed into a whole by bolts; the reducer seat is provided with a center hole and a planetary gear symmetrical about the center hole, the output end of the rotor passes through the center hole and meshes with the planetary gear, the reducer end cover and the reducer The three planetary gears are positioned together by the device seat, and the right half shaft is arranged on the end cover of the reducer, and the right half shaft passes through the center hole of the right end cover of the hub, and a clutch is arranged inside the right end cover, and the clutch is connected with the three planetary gears. Matching; the left end cover and the right end cover are fixedly connected on the hub shell to surround the motor and the reduction mechanism.

A rotating shaft is arranged at the center of the rotor, and a bearing is sleeved at both ends of the rotating shaft, and the two bearings are respectively accommodated at the center hole of the reducer seat and the central blind hole of the stator end cover.

Bearings are arranged at the central holes of the left and right end covers, and the size of the bearings is compatible with the left and right half shafts.

The clutch is composed of a reduction ring gear, a clutch seat, a positioning roller, a roller ring cover, a clutch roller and a fixed ring. It is installed on the fixed hole of the clutch seat to ensure the concentricity of the decelerating ring gear and the clutch seat with the fixed ring. The clutch roller is set in the clutch hole of the clutch seat, and the fixed ring has a clutch chute that matches the clutch roller. The clutch seat and the positioning ring are also provided with protrusions for mutual spacing, and the roller ring cover limits each roller in the positioning hole and the clutch hole.

The utility model changes the original structure in which the main shaft of the hub motor runs through all parts, adopts a two-stage main shaft, and connects the stator, the stator end cover and the reducer seat as a whole, so that the above three parts and the left and right half shafts The stationary parts are combined into a whole, and the planetary gear on the clutch seat is driven by the rotor, which further drives the deceleration ring gear of the clutch on the right end cover. There are bearings at both ends of the rotor, and the two bearings are accommodated in the center hole of the clutch seat and the stator end. In the blind hole in the center of the cover, this setting makes the force balance of the rotor when it is working, and the noise of the rotor is lower when it is working. Bearings are installed at the center holes of the left and right end covers to ensure that the rotor drives the hub shell to rotate. , the good coaxiality between the stationary part and the rotating part and the reduction of friction can prolong the service life of the motor; in addition, another feature of the utility model is that the clutch is set inside the right end cover as a whole, which makes full use of the space of the end cover and adopts the deceleration gear As the active part of the clutch, the deceleration ring gear needs the cooperation of the deceleration ring gear to realize the function of deceleration and increasing torque. The new model connects the motor and the clutch through bolts to form an integral module, and the clutch and the right end cover are another module. When assembling, you only need to install the module inside the hub shell, and wrap the motor and reducer by the left and right end covers. Assembly, assembly is very convenient, and at the same time reduces the failure rate of the motor in operation.

Description of drawings

Fig. 1 is the three-dimensional exploded schematic view of the utility model;

Fig. 2 is the structural representation of the utility model speed reducer;

Fig. 3 is a structural schematic diagram of the right end cap.

Detailed ways

As shown in Figures 1-3, an electric wheel hub motor includes a hub shell 1, an end cover, a reduction mechanism and motor components. The motor component includes a stator 21 and a rotor 22, and the rotor 22 is accommodated in the stator 21. One end of the stator 21 is closed by the stator end cover 23, the outside of the stator end cover 23 is fixedly connected with the left half shaft 11, and the inner side is provided with a central blind hole 24, the left half shaft 11 passes through the center of the left end cover 12, and the stator 21 The other end is connected to the reducer seat 31, and the stator end cover 23, the stator 21 and the reducer seat 31 are fixed into a whole by bolts; the reducer seat 31 is provided with a center hole 33 and symmetrical holes about the center hole. The planetary gear 32, the output end 25 of the rotor 22 passes through the center hole 33 and meshes with the planetary gear 32, a bearing 26 is provided at both ends of the central shaft of the rotor 22, and the two bearings 26 are respectively accommodated in the center of the reducer seat The hole 33 and the central blind hole 24 of the stator end cover, the reducer end cover 34 and the reducer 31 seat together position the three planetary gears 32, and the reducer end cover 34 is provided with a right half shaft 13 and a right half shaft 13 Go out from the central hole of the right end cover 14 of the hub, and a clutch is arranged inside the right end cover 14 to cooperate with three planetary gears 32. The roller 44, the roller ring cover and the fixed ring 45 are composed of the deceleration ring gear 41, the clutch seat 42 and the fixed ring 45, which are arranged coaxially in sequence, and the positioning roller 43 is arranged on the fixed hole of the clutch seat 42 to ensure The coaxiality of the reduction ring gear 41, the clutch seat 42 and the fixed ring 45, the clutch roller 44 is set in the clutch hole of the clutch seat 42, and the fixed ring 45 is provided with a clutch chute 46 that cooperates with the clutch roller 44, On the clutch seat 42 and the positioning ring 45, there are also protrusions 47, 48 for mutual spacing, and the roller ring cover limits each roller in the fixing hole and the clutch hole; the left end cover 12 and the right end cover 14 are fixed on the The hub shell 1 surrounds the motor and the reduction mechanism, and bearings are arranged at the center holes of the left and right end covers 12 and 14, and the size of the bearings is adapted to the size of the left and right half shafts.

The utility model adopts a completely different structure from the current electric wheel hub motor, and divides the main shaft of the motor into left and right half shafts. The left half shaft 11 is connected with the stator end cover 23, and the right half shaft 13 is connected with the reducer end cover 34. The motor and the reducer between the left and right half shafts 11 and 13 are connected together by bolts. This structure connects the stationary parts as a whole, and the stationary parts and the moving parts are connected by bearings to ensure The concentricity of the moving parts during work reduces the wear between the parts and prolongs the working life of the parts.

Another feature of the utility model is that the clutch is arranged inside the right end cover, and the parts of the clutch are arranged coaxially, and are set outside the planetary gear to mesh with the planetary gear 32. This design fully utilizes the inner space of the hub and can reduce the number of hub motors. volume; the clutch of the utility model is composed of a deceleration ring gear 41 coaxially arranged, a clutch seat 42, a fixed ring 45 and a positioning roller 43 arranged on the clutch seat, a clutch roller 44 and a roller ring cover. The coaxiality is good, the clutch idling gap is short, and because the diameter of each part of the clutch is large, the relative impact force between the parts is small, the wear is light, and the working performance of the clutch is more stable.

The working process of the utility model is as follows: the rotation of the rotor is transmitted to the three planetary gears through the output end, and the planetary gear and the reduction ring gear form a reduction device to increase the output torque and reduce the output speed at the same time, through the reduction mechanism and finally through the clutch device , to transmit the power of the motor to the hub shell, so as to push the electric vehicle forward; The process can ensure a high degree of coaxiality. At the same time, all parts of the clutch device are coaxially arranged, and the wear and tear between each other is greatly reduced during work, so the noise during work is low, and the internal parts are not easily damaged. The life of the motor get extended.

Claims (4)

1, a kind of wheel hub electric motor of electric vehicle, comprise hub shell, end cap, reducing gear and motor component, motor component comprises stator and rotor, rotor is placed in the stator, it is characterized in that: an end of described stator is closed by the stator terminal cap seal, and the stator end cap outside is fixed with left half axle, the inboard is provided with a central blind hole, left half axle passes from the center of left end cap, and the other end of stator is connected with the decelerator seat, and stator end cap, stator and decelerator seat three are fixed into an integral body by bolt; Described decelerator seat is provided with a centre bore and about the planetary gear of centre bore symmetry, the output of rotor passes this centre bore and planetary gear engagement, decelerator end cap and decelerator seat are together to three planetary gear location, the decelerator end cap is provided with right axle shaft, right axle shaft passes from the central hole of the right end cap of wheel hub, be provided with clutch in right end cap inside, clutch matches with three planetary gears; Left end cap and right end cap are connected on the hub shell motor and reducing gear are surrounded.

2, a kind of wheel hub electric motor of electric vehicle as claimed in claim 1 is characterized in that: be provided with rotating shaft in described centre of rotor, and equal socket one bearing in rotating shaft two ends, two bearings is contained in the central blind hole place of decelerator seat central hole and stator end cap respectively.

3, a kind of wheel hub electric motor of electric vehicle as claimed in claim 1 is characterized in that: the central hole at described left and right end cap all is provided with bearing, and this bearing size and left and right half adapt.

4, a kind of wheel hub electric motor of electric vehicle as claimed in claim 1, it is characterized in that: described clutch is by reduction gear ring, the clutch seat, positioning roller, the roller ring cowling, clutch roller and retainer plate are formed, reduction gear ring, the coaxial successively socket setting of clutch seat and retainer plate, described positioning roller is arranged on the fixing hole of clutch seat, guarantee the concentricity of reduction gear ring and clutch seat and retainer plate, the clutch roller is provided with in the clutch hole of clutch seat, have the clutch skewed slot that cooperates with this clutch roller at retainer plate, also be provided with the projection of mutual spacing usefulness on clutch seat and centring ring, the roller ring cowling is spacing in location hole and clutch hole with each roller.

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