CN203401963U - Motor-driven hub reduction system - Google Patents

Abstract

The utility model discloses a wheel side deceleration system driven by a motor, which comprises a motor (1), a wheel hub (19), a primary deceleration mechanism (101) and a secondary deceleration mechanism (102), the motor (1), a The first-stage reduction mechanism (101), the second-stage reduction mechanism (102), and the hub (19) are connected sequentially; the second-stage reduction mechanism (102) is a planetary reduction mechanism, and the hub motor planetary reduction system is highly integrated, compact in assembly, easy to maintain, and simple in structure , strong reliability, easy processing and manufacturing, easy to realize all-wheel drive.

Description

Motor driven wheel reduction system

technical field

The utility model belongs to the technical field of auto parts manufacturing, in particular, the utility model relates to a motor-driven wheel side deceleration system.

Background technique

The wheel-hub electric vehicle is a new type of driven electric vehicle, which has two basic forms: the direct-drive electric wheel and the electric wheel with a wheel-side reducer.

The direct-drive electric wheel without wheel-side reduction system directly drives the wheel hub by the inner or outer rotor of the motor, which has poor starting and acceleration performance and slow system response. Electric wheels with wheel-side reducers are rarely used at present, and most of them are driven by one-stage reduction, and are often constrained by the performance of the motor, which cannot generate enough driving force to drive the car in certain occasions.

Utility model content

What the utility model aims to solve is to provide a motor-driven wheel-side deceleration system that uses electric energy as a power source, simplifies the operating mechanism, improves transmission efficiency, and generates sufficient driving force.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A wheel side reduction system driven by a motor, including a motor, a hub, and a primary reduction mechanism and a secondary reduction mechanism, the motor, the primary reduction mechanism, the secondary reduction mechanism, and the hub are connected in sequence; the secondary reduction mechanism is a planetary reduction mechanism mechanism.

The primary reduction mechanism includes a cylindrical gear and an internal gear meshing with each other; the cylindrical gear is fixedly connected with the main shaft of the motor;

The central hole of the internal gear is vacantly sleeved on the stepped shaft;

The two-stage reduction mechanism includes sun gear, planetary gear, ring gear and planet carrier;

The sun gear is fixedly connected with the internal gear; the planetary gear is rotatably installed on the planetary carrier, and the sun gear meshes with the planetary gear;

The planet carrier is fixedly connected with the stepped shaft.

It also includes outer hub, reducer housing, bracket, reducer end cover, brake caliper, brake disc;

The reducer housing and the reducer end cover together form a sealed reducer box;

The bracket is installed on the outer end of the reducer housing; the brake caliper is installed on the outer end of the reducer end cover; the brake disc is installed on the hub;

The ring gear is fixedly installed in the reducer housing.

The two ends of the stepped shaft are installed on the reducer housing and the reducer end cover respectively through the first tapered roller bearing and the second tapered roller bearing, and the stepped shaft is fixedly connected with the wheel hub through the spline.

The outer hub is fixedly connected to the hub through hub bolts.

One end of the stepped shaft is fixed by the hub nut and sealed by the hub protective end cover.

The planet carrier is fixedly connected with the stepped shaft through splines.

The utility model has the advantage that, compared with the traditional internal combustion engine vehicle, it has its unique technical characteristics and advantages in terms of power source configuration and chassis structure, and its beneficial technical effects are mainly reflected in the following aspects:

1. The power control is changed from hard connection to soft connection. Through the electronic wire control technology, the stepless speed change of each electric wheel from zero to the maximum speed and the differential speed control between each electric wheel are realized, omitting the mechanical parts required by traditional cars. The drive system and the whole vehicle have a simple structure, a large effective use of space, and improved transmission efficiency.

2. The driving force of each wheel is directly and independently controllable, can respond quickly, and is flexible in forward and reverse rotation. Efficient utilization implements optimal control and management to save energy.

3. The degree of freedom in vehicle layout and body shape design is greatly increased, and the load-carrying function and transmission function of the frame are separated, the structure is greatly simplified, and it is easy to realize the diversification and serialization of products with the same chassis and different body shapes, shortening the cost The development cycle reduces the development cost.

4. On the four-wheeled vehicle using the in-wheel motor drive system, if the four-wheel steering by wire technology (4WS) is further introduced, the high-performance steering of the vehicle can be realized, the steering radius can be reduced, and even zero steering radius can be realized, which greatly increases the steering. convenience.

5. There are almost no high-power moving parts on the body, and the vibration, noise, heat radiation and comfort of the vehicle are greatly improved.

Improve the starting and accelerating performance of the car, give full play to the advantages of wheel drive, and generate enough driving force to drive the car for specific occasions. Increase the output torque of the drive system.

Description of drawings

Fig. 1 is the schematic diagram of the hub motor planetary reduction system involved in the utility model;

Fig. 2 is a schematic diagram of the overall structure of the hub motor of the present invention;

Fig. 3 is a left view of the structure shown in Fig. 2;

Fig. 4 is a schematic structural diagram of the hub motor planetary reduction system of the present invention;

Fig. 5 is the schematic diagram of the hub structure of the present utility model;

Fig. 6 is a schematic view of the end face of the hub of the present invention.

The symbols in the above figures are:

1. Motor, 2. First tapered roller bearing, 3. Bracket, 4. Bracket bolt, 5. Reducer end cover, 6. Cylindrical gear, 7. Planet carrier, 8. Sun gear, 9. Spline of stepped shaft , 10, stepped shaft, 11, second tapered roller bearing, 12, internal gear, 13, planetary gear, 14, ring gear, 15, end cover bolt, 16, reducer housing, 17, bolt, 18, system Moving pliers, 19, hub, 20, hub bolt, 21, spline, 22, hub nut, 23, hub protective end cover, 24, outer hub, 25, brake disc, 101, primary reduction mechanism, 102, two stage reduction mechanism.

Detailed ways

The specific implementation of the present utility model will be described in further detail below by describing the embodiments with reference to the accompanying drawings.

As shown in Figure 1, it is a structural block diagram of the present utility model. It includes a motor 1, a hub 19, a primary reduction mechanism, and a secondary reduction mechanism. The motor 1 is connected to the hub 19 through a primary reduction mechanism 101 and a secondary reduction mechanism 102; the secondary reduction mechanism 102 is a planetary reduction mechanism.

The motor is mounted on the reducer housing.

As shown in Figure 2 to Figure 6:

The first-stage deceleration mechanism 101 is installed on one side of the motor 1, and is connected to the motor 1 for transmission, and is driven by the motor 1 to realize the first-stage deceleration by adopting gear and ring gear meshing transmission.

The first-stage reduction mechanism 101 includes a cylindrical gear 6 and an internal gear 12 meshing with each other; the cylindrical gear 6 is fixedly connected to the main shaft of the motor 1 ;

The two-stage reduction mechanism 102 includes a sun gear 8, a planetary gear 13, a ring gear 14, and a planet carrier 7; the sun gear 8 is fixedly connected to the internal gear 12; the planet carrier 7 is fixedly connected to the stepped shaft 10 in a circumferential direction.

The secondary reduction mechanism 102 adopts a planetary gear reduction transmission, is connected to the output end of the primary reduction mechanism 101, and is fixed by the ring gear 14, and the transmission mode of the planet carrier 7 is output. The ring gear 14 is fixed on the reducer housing and can be disassembled. Replacement.

The secondary deceleration mechanism 102 is installed between the primary deceleration mechanism 101 and the end cover 5 of the reducer, and adopts a single planetary row for deceleration.

As shown in Figure 1 and Figure 2, the hub motor planetary reduction system of the present invention includes a motor 1, a primary reduction system 101, a secondary reduction system 102, a reducer housing 16, a reducer end cover 5, a stepped shaft 10, The first tapered roller bearing 2 and the second tapered roller bearing 11, hub 19, outer hub 24, hub nut 22, brake caliper 18, brake disc 25, bracket 3, hub protective end cover 23, stepped shaft spline 9 etc.

The input end of the secondary reduction mechanism 102 is driven by the output end internal gear 12 of the primary reduction mechanism 101, that is, the power of the internal gear 12 is directly transmitted to the input end sun gear 8 of the secondary reduction mechanism 102, and the sun gear 8 rotates freely. The ring gear 14 is installed and fixed, and the transmission mode of the planetary carrier 7 is used; the ring gear 14 is fixedly installed and can be disassembled and replaced; the planetary carrier 7 is the output end of the two-stage reduction mechanism 102, and its power is output to the stepped shaft 10, using splines In the connection transmission mode, the stepped shaft spline 9 transmits the torque from the planet carrier 7 to the stepped shaft 10, and then the stepped shaft 10 transmits the torque to the hub 19 through the spline 21, and finally to the outer hub 24.

The two ends of the stepped shaft 10 are supported by the tapered roller bearing 2 and the tapered roller bearing 11, the first tapered roller bearing 2 and the second tapered roller bearing 11 are used to bear the vertical load on the ground and the axial force generated when the vehicle rolls , which are installed on the reducer housing 16 and the reducer end cover 5 respectively, and after the end cover is fixed and installed by the end cover bolts 15 on the reducer end cover 5, the axial position of the two bearings is fixed; the hub 19 is installed on the ladder On the shaft 10, it is connected by a spline 21 and transmits the torque of the stepped shaft 10, and the outer end of the hub 19 is fixedly connected to the outer hub 24 by the hub bolt 20, and after the connection, the outer end is fixed axially by the hub nut 22 The outer hub 24 is simple in structure and light in weight, easy to assemble and disassemble and easy to manufacture; As shown in Fig. 3 and Fig. 4, a braking mechanism is installed between the hub 19 and the reducer end cover 5, including a brake caliper 18 and a brake disc 25, the brake disc 25 is installed inside the hub 19, and the brake caliper 18 is fixedly installed on the reducer end cover 5 through bolts 17, and the brake caliper 18 and the brake disc 25 realize the braking of the hub 19 through friction.

The hub motor planetary reduction system includes a reducer housing 16 , a reducer end cover 5 , a brake caliper 18 , a brake disc 25 , a hub 19 , an outer hub 24 , and a stepped shaft 10 .

The reducer casing 16 and the reducer end cover 5 are connected by bolts to form a sealed box together, and it is an assembled body of the primary reduction mechanism 101 and the secondary reduction mechanism 102, which can realize liquid lubrication.

The brake caliper 18 is fixedly installed on the end cover 5 of the reducer, and the brake disc 25 is fixedly installed on the hub 19, and the hub braking is realized through friction.

The wheel hub 19 and the outer wheel hub 24 are connected as a whole by bolts, and the integrated wheel hub is fixedly installed on the stepped shaft 10 by the hub nut 22, and the torque of the stepped shaft 10 is obtained through the spline, and an anti-loosening device is provided on the outside of the wheel hub nut 22 And hub protective end cover 23 is arranged.

Tapered roller bearings are installed on both sides of the stepped shaft, assembled on the reducer housing 16 and the reducer end cover 5, and realize its axial positioning through the reducer end cover 5 and the stepped shaft 10, and can withstand a certain axial force. force.

The internal gear 12 is fixed together with the sun gear 8 or manufactured as an integral gear,

The planet carrier 7 is fixedly connected circumferentially with the stepped shaft 10 through the stepped shaft spline 9;

It also includes an outer hub 24, a reducer housing 16, a bracket 3, a reducer end cover 5, a brake caliper 18, and a brake disc 25;

The reducer housing 16 and the reducer end cover 5 together form a sealed reducer case;

The bracket 3 is installed on the outer end of the reducer housing 16; it is installed through the bracket bolt 4. The brake caliper 18 is installed on the outer end of the reducer end cover 5; the brake disc 25 is installed on the hub 19; the brake disc 25 is braked by the brake caliper 18 through friction to realize the braking of the hub 19;

Finally, the braking control of the outer hub 24 is realized.

The ring gear 14 is fixedly installed in the reducer housing 16 .

The motor 1 first drives the primary reduction mechanism 101 and then drives the secondary reduction mechanism 102,

The internal gear 12 and the sun gear 8 jointly rotate around the axis of the stepped shaft 10 , the planet carrier 7 is connected to the stepped shaft 10 through the stepped shaft spline 9 , and the stepped shaft spline 9 transmits power from the planet carrier 7 to the stepped shaft 10 .

The two ends of the stepped shaft 10 are installed on the reducer housing 16 and the reducer end cover 5 through the first tapered roller bearing 2 and the second tapered roller bearing 11. The stepped shaft 10 rotates around its axis, and is connected to the The power is transmitted to the hub 19.

The outer hub 24 is fixedly connected to the hub 19 through hub bolts 20 .

And the assembly is compact and easy to fix, and the outer hub 24 is easy to manufacture and light in weight, so it is easy to carry and replace.

The wheel hub 19 is assembled with the outer wheel hub 24, the position of the shaft end is fixed by the wheel hub nut 22, and the outer end is sealed and protected by the wheel hub protective end cover 23.

Assembly sequence: as shown in FIG. 2 , the first step is to install the motor 1 into the reducer housing 16 for fixing. In the second step, install the first tapered roller bearing 2 into the bearing seat of the reducer housing 16, insert the stepped shaft 10, and then install the first-stage reduction mechanism 101 and the second-stage reduction mechanism 102 in sequence, and then install the second tapered roller bearing The sub-bearing 11 is installed on the other side of the stepped shaft 10, and the end cover 5 of the reducer is covered and fixed and sealed with the end cover bolts 15; thus the overall assembly of the hub motor planetary reduction system is completed. In the third step, the brake caliper 18 is first placed on the brake disc 25, the brake disc 25 is fixed on the hub 19, and then the hub 19 is connected to the stepped shaft 10 through the spline 21, and the shaft is fixed by the hub nut 22 To the position, cover the hub protective end cap 23. The fourth step is to use relevant tools to fix the brake caliper 18 on the reducer end cover 5 through the heat dissipation holes on the spoke plate surface of the hub 19, and finally connect the outer hub 24 to the hub 19 through the hub bolts 20 to complete the overall assembly .

The hub motor planetary reduction system has a simple structure and high transmission efficiency. The bipolar reduction of the hub motor can be realized through the primary reduction mechanism 101 and the secondary reduction mechanism 102. The transmission ratio is large, so it is easy to realize the motor driving the whole vehicle.

The in-wheel motor planetary reduction system can not only give full play to the performance of the motor and speed up the system response speed, but also use double-stage reduction to increase the transmission ratio of the system, greatly increase the output torque of the system, and generate enough driving force to drive the car while giving full play to the performance of the motor. At the same time, it is beneficial to reduce the load of the motor and alleviate the impact of the uneven road surface on the motor, which is of great significance to improving the overall life of the electric wheel.

After adopting such a structure, compared with traditional internal combustion engine vehicles, it has its unique technical features and advantages in terms of power source configuration and chassis structure, and its beneficial technical effects are mainly reflected in the following aspects:

1. The power control is changed from hard connection to soft connection. Through the electronic wire control technology, the stepless speed change of each electric wheel from zero to the maximum speed and the differential speed control between each electric wheel are realized, omitting the mechanical parts required by traditional cars. The drive system and the whole vehicle have a simple structure, a large effective use of space, and improved transmission efficiency.

2. The driving force of each wheel is directly and independently controllable, can respond quickly, and is flexible in forward and reverse rotation. Efficient utilization implements optimal control and management to save energy.

3. The degree of freedom in vehicle layout and body shape design is greatly increased, and the load-carrying function and transmission function of the frame are separated, the structure is greatly simplified, and it is easy to realize the diversification and serialization of products with the same chassis and different body shapes, shortening the cost The development cycle reduces the development cost.

4. On the four-wheeled vehicle using the in-wheel motor drive system, if the four-wheel steering by wire technology (4WS) is further introduced, the high-performance steering of the vehicle can be realized, the steering radius can be reduced, and even zero steering radius can be realized, which greatly increases the steering. convenience.

5. There are almost no high-power moving parts on the body, and the vibration, noise, heat radiation and comfort of the vehicle are greatly improved.

Improve the starting and accelerating performance of the car, give full play to the advantages of wheel drive, and generate enough driving force to drive the car for specific occasions. Increase the output torque of the drive system.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned methods, as long as various insubstantial improvements are made by adopting the method concept and technical solutions of the utility model, or Directly applying the ideas and technical solutions of the utility model to other occasions without improvement is within the protection scope of the utility model.

Claims (7)

1. a motor-driven wheel edging deceleration system, comprise electrical motor (1), wheel hub (19), it is characterized in that: also comprise primary speed-down mechanism (101) and two reduction gear (102), described electrical motor (1), primary speed-down mechanism (101), two reduction gear (102), wheel hub (19) connect successively; Described two reduction gear (102) is planetary gear speed reducing mechanism.

2. a kind of motor-driven wheel edging deceleration system according to claim 1, is characterized in that:

Described primary speed-down mechanism (101) comprises intermeshing cylindrical wheel (6) and inner gear (12); Described cylindrical wheel (6) is fixedly connected with the main shaft of electrical motor (1);

The centre hole empty set of described inner gear (12) is on stepped shaft (10);

Described two reduction gear (102) comprises sun wheel (8), satellite gear (13), gear ring (14), pinion carrier (7);

Described sun wheel (8) is fixedly connected with described inner gear (12); It is upper that described satellite gear (13) is installed in rotation on pinion carrier (7), and sun wheel (8) is meshed with satellite gear (13);

Described pinion carrier (7) is fixedly connected with described stepped shaft (10).

3. a kind of motor-driven wheel edging deceleration system according to claim 2, is characterized in that:

Also comprise outer wheel hub (24), reducer shell (16), support (3), retarder end cap (5), brake clamp (18), brake disc (25);

Described reducer shell (16) and the common reduction case that forms sealing of retarder end cap (5);

Described support (3) is installed on the outer end of reducer shell (16); Described brake clamp (18) is installed on the outer end of retarder end cap (5); Described brake disc (25) is arranged on wheel hub (19);

Described gear ring (14) is fixedly mounted in reducer shell (16).

4. a kind of motor-driven wheel edging deceleration system according to claim 3, it is characterized in that: described stepped shaft (10) two ends are arranged on respectively reducer shell (16) by the first tapered roller bearing (2) and the second tapered roller bearing (11) and retarder end cap (5) is upper, and described stepped shaft (10) is fixedly connected with wheel hub (19) by spline (21).

5. a kind of motor-driven wheel edging deceleration system according to claim 4, is characterized in that: described outer wheel hub (24) is connected with wheel hub (19) fixed installation by boss bolt (20).

6. a kind of motor-driven wheel edging deceleration system according to claim 5, is characterized in that: one end of described stepped shaft (10) is fixing by hub nut (22), and by wheel hub protection end cap (23) sealing.

7. a kind of motor-driven wheel edging deceleration system according to claim 6, is characterized in that: described pinion carrier (7) is fixedly connected with stepped shaft (10) by stepped shaft spline (9).

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