CN116526747A - Hub motor and drum brake integrated device - Google Patents

Hub motor and drum brake integrated device Download PDF

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Publication number
CN116526747A
CN116526747A CN202310255629.XA CN202310255629A CN116526747A CN 116526747 A CN116526747 A CN 116526747A CN 202310255629 A CN202310255629 A CN 202310255629A CN 116526747 A CN116526747 A CN 116526747A
Authority
CN
China
Prior art keywords
brake
drum
motor
hub motor
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202310255629.XA
Other languages
Chinese (zh)
Inventor
王奎洋
孙钰欣
楚博士
王渝甬
朱睿
仇雯
邹一驹昂
罗大鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu University of Technology
Original Assignee
Jiangsu University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu University of Technology filed Critical Jiangsu University of Technology
Priority to CN202310255629.XA priority Critical patent/CN116526747A/en
Publication of CN116526747A publication Critical patent/CN116526747A/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/106—Structural association with clutches, brakes, gears, pulleys or mechanical starters with dynamo-electric brakes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/20—Structural association with auxiliary dynamo-electric machines, e.g. with electric starter motors or exciters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention discloses an integrated device of a hub motor and a drum brake, which comprises the hub motor and a drum brake structure, wherein the hub motor comprises a rotor, a stator and a shell, the stator is fixed in the shell, and the rotor is arranged on the inner side of the stator; the drum brake structure comprises a brake drum, friction plates, brake shoes and a brake motor, wherein the brake drum rotates along with a rotor, the two brake shoes are symmetrically arranged on the inner side of the brake drum, the friction plates are fixed on the outer wall surfaces of the brake shoes, the brake motor is arranged between the two groups of brake shoes, and the brake motor drives the two brake shoes to move back to enable the friction plates to abut against the inner wall of the brake drum, so that the brake of the brake drum is realized. The integrated braking device adopts an integrated structure of two braking modes, fully utilizes the advantages of quick response and non-contact friction, improves the response speed of a braking system, shortens the braking time, improves the braking efficiency and the braking safety, prolongs the service life of the brake and improves the endurance mileage of the vehicle.

Description

Hub motor and drum brake integrated device
Technical Field
The invention relates to an integrated device of an in-wheel motor and a drum brake.
Background
The electric automobile has the outstanding advantage of zero emission during running, so the electric automobile is favored by automobile science and technology workers worldwide. The hub motor electric automobile realizes that a power system, a transmission system, a braking system and the like are integrally arranged on the inner side of a hub, and compared with the traditional centralized driving electric automobile, the hub motor electric automobile has the advantages of simplifying the whole automobile structure, reducing mechanical loss, improving working efficiency, facilitating complex control and the like, and is an important direction for the development of the electric automobile in the future.
The braking system is one of important components of the chassis of the automobile, and is directly related to the comprehensive performance and life and property safety of the automobile. Although the traditional hydraulic and pneumatic braking system can meet various requirements of the existing braking regulations, the defects of complex pipeline arrangement, dependence on a vacuum booster, low braking response speed, incapability of actively adjusting braking torque, difficulty in integrated control with other systems and the like exist, and the system is not suitable for development requirements of automobiles, particularly electric automobiles.
The brake-by-wire system realizes the decoupling of the brake pedal mechanism and the brake actuating mechanism, mainly comprises an electronic hydraulic brake system (EHB) and an electronic mechanical brake system (EMB), cancels the direct connection between the brake pedal mechanism and the brake actuating mechanism, takes an electric wire as an information transmission medium, and the electronic control unit recognizes the brake intention according to related sensor signals to control the brake actuating mechanism to act so as to realize the control of the braking force of each wheel.
The integrated device for regenerative braking and friction braking combines the functions and advantages of a regenerative braking and friction braking system, can be respectively arranged on the inner sides of all wheels, and has the advantages of small volume, high integration level, convenience in installation, flexible control and the like. However, the integrated device of the hub motor and the friction brake is less. At present, the most similar related technology with the invention patent is the urban bus hub flywheel energy storage and drum brake integrated brake device with the issued publication number of CN110185724B, but the invention has the problems that the friction brake integration level is lower, the combined brake device is large in size, the automobile is only decelerated and stopped by means of a friction brake, the friction brake component is excessively worn after long-time braking, the heat fading of the brake is generated, the braking performance of the whole automobile is influenced, and even the braking failure is caused.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides an integrated device for a hub motor and a drum brake. The integrated braking device is independently arranged on the inner side of the vehicle hub, can provide larger regenerative braking torque of the hub motor, effectively shunt vehicle braking energy, reduce abrasion and temperature of a friction brake, recover regenerative braking energy, and has the advantages of small volume, light weight, compact structure, convenient arrangement, good heat fading resistance and convenient integrated control.
The invention adopts the technical scheme that:
an integrated device for an in-wheel motor and drum brake, comprising
The hub motor comprises a rotor, a stator and a shell, wherein the stator is fixed in the shell, and the rotor is arranged on the inner side of the stator;
the drum brake structure comprises a brake drum, friction plates, brake shoes and a brake motor, wherein the brake drum rotates along with a rotor, the two brake shoes are symmetrically arranged on the inner side of the brake drum, the friction plates are fixed on the outer wall surfaces of the brake shoes, the brake motor is arranged between the two groups of brake shoes, and the brake motor drives the two brake shoes to move back to enable the friction plates to abut against the inner wall of the brake drum, so that braking of the brake drum is realized.
Further, the brake shoe comprises brake blocks, a fixing seat and reset springs, wherein the four brake blocks are symmetrically arranged on the inner side of the brake drum in groups, two brake blocks of each group are symmetrically hinged on the fixing seat, and two reset springs are connected between the two groups of brake blocks.
Further, the braking motor is a double-shaft direct current motor or a double-shaft stepping motor, screw rods are fixed on two output shafts of the braking motor, nuts are fixed at two ends of each group of braking plates, and the nuts are in threaded connection with the screw rods.
Further, the hub motor is an outer rotor hub motor, a rotor of the outer rotor hub motor is fixedly connected with the brake drum, and a heat insulation gasket is arranged between the rotor and the brake drum.
Further, the hub motor is an inner rotor hub motor, a gear ring, planetary gears and a sun gear are arranged in the inner rotor hub motor, the gear ring is arranged on the inner side of the brake shoe and is connected with the shell, the four planetary gears are rotationally arranged in the gear ring and meshed with the gear ring, and the sun gear is arranged in the middle of the planetary gears and meshed with all the planetary gears, and a rotating shaft on the inner rotor of the inner rotor hub motor is fixedly connected with the sun gear.
Further, a heat insulation gasket is arranged between the inner brake shoe of the inner rotor hub motor and the outer shell.
The hub motor can perform regenerative braking and perform braking energy recovery, so that the endurance mileage is improved. The friction brake assembly adopts a drum brake mode and is used for generating friction braking moment. When the speed and the braking strength reach a certain value, the hub motor preferentially carries out regenerative braking and braking energy recovery, and the advantages of quick response and non-contact friction are fully utilized, so that part of braking energy is shared, the abrasion of the friction brake is reduced, and the heat fading resistance of the friction brake is improved. The invention cancels the traditional hydraulic or pneumatic pipeline structure and has the characteristics of compact structure, convenient arrangement, easy integrated control, good heat fading resistance and the like. The beneficial effects that produce from this are:
1) The invention integrates the functions and advantages of regenerative braking and a brake-by-wire system, and utilizes non-contact electromagnetic braking to share braking energy, thereby reducing the abrasion of a friction brake and improving the heat fading resistance of a vehicle brake;
2) The invention adopts a distributed arrangement mode, the traditional hydraulic or pneumatic pipeline is eliminated, the integrated braking device is independently arranged in the wheel hub, the arrangement is relatively easy, and the structural change of the original automobile system is small;
3) The integrated braking device can adopt the combination control of regenerative braking and friction braking torque, fully plays the role of electromagnetic braking, and has the advantages of high integration level, convenient arrangement and suitability for high-quality integrated control;
4) The integrated braking device adopts an integrated structure of two braking modes, plays the advantages of respective braking systems, fully utilizes the advantages of quick response and non-contact friction, improves the response speed of the braking systems, shortens the braking time, improves the braking efficiency and the braking safety, prolongs the service life of the brake, and simultaneously improves the endurance mileage of the vehicle.
Drawings
FIG. 1 is a schematic diagram of an integrated device arrangement of the present invention.
Fig. 2 is a schematic diagram of an outer rotor hub motor integrated with a drum brake structure.
Fig. 3 is a schematic diagram of an inner rotor hub motor integrated with a drum brake structure.
Fig. 4 is a structural view of a drum brake structure.
Fig. 5 is a schematic diagram of the working principle of the present invention.
In the figure:
1-tyre, 2-hub, 3-integrated device, 4-rotor, 5-brake drum, 6-friction disc, 7-brake shoe, 8-spindle, 10-heat insulation gasket, 11-stator, 12-permanent magnet, 13-stator core, 14-stator winding, 15-shell, 17-fixing seat, 18-brake motor, 19-lead screw, 20-nut, 21-reset spring, 22-gear ring, 23-planetary gear, 25-sun gear and 27-brake disc.
Description of the embodiments
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 5, the hub motor and drum brake integrated device of the present invention is characterized in that the integrated device 3 is independently installed on the inner side of each wheel hub 2 in a distributed arrangement, the braking torque of each integrated brake device can be independently adjusted, and the hydraulic or pneumatic pipeline of the conventional brake system is eliminated. The integrated device specifically comprises an in-wheel motor and a drum brake structure, and the components and assembly are described in detail below.
The hub motor comprises a rotor 4, a stator 11 and a shell 15, wherein a stator core 13 and a stator winding 14 are arranged on the stator 11, the stator 11 is fixed in the shell 15, and the rotor 4 is arranged on the inner side of the stator 11; the rotor 4 is provided with permanent magnets 12.
The drum brake structure comprises a brake drum 5, friction plates 6, brake shoes 7 and a brake motor 18, wherein the brake drum 5 rotates along with a rotor 4, the two brake shoes 7 are symmetrically arranged on the inner side of the brake drum 5, the friction plates 6 are fixed on the outer wall surfaces of the brake shoes 7, the brake motor 18 is arranged between the two groups of brake shoes 7, and the brake motor 18 drives the two brake shoes 7 to move back to enable the friction plates 6 to abut against the inner wall of the brake drum 5, so that the brake of the brake drum 5 is realized.
The brake shoe 7 is in an arc shape and is of a split structure, and comprises brake plates 27, a fixed seat 17 and return springs 21, wherein four brake plates 27 are symmetrically arranged on the inner side of a brake drum 5 in pairs, two brake plates 27 of each group are symmetrically hinged on the fixed seat 17, and two return springs 21 are connected between the two brake plates 27.
The brake motor 18 is a double-shaft direct current motor or a double-shaft stepping motor, the brake motor 18 drives the brake plates 27 to move back through a screw mechanism, the screw mechanism comprises a screw rod and nuts, the screw rod 19 is fixed on two output shafts of the brake motor 18, the nuts 20 are fixed on two ends of each group of brake plates 27, and the nuts 20 are in threaded connection with the screw rod 19.
The brake drum 5 is of cylindrical construction and encloses all the components of the drum brake, and movement of the nut 19 brings about rotation of the brake pads 27 about the hinge point in an angular range such that the friction pads 6 are pressed against or away from the brake drum 5 to perform or stop a friction braking action.
The integrated device of the present invention can be applied to an outer rotor hub motor or an inner rotor hub motor, as shown in fig. 2 and 3.
When applied to an outer rotor hub motor (as shown in fig. 2), a rotor 4 of the outer rotor hub motor is fixedly connected with a brake drum 5, and a heat insulation gasket 10 is arranged between the rotor 4 and the brake drum 5.
When the planetary gear mechanism is applied to an inner rotor hub motor (shown in fig. 3), a gear ring 22, a planetary gear 23 and a sun gear 25 are arranged in the inner rotor hub motor, and the planetary gear mechanism is positioned between the hub motor and the rim and is used for reducing speed, increasing torque and driving wheels to rotate. Wherein the gear ring 22 is arranged on the inner side of the brake shoe 7 and is connected with the housing 15, and the gear ring 23 is a stationary part of the planetary gear mechanism. The four planetary gears 23 are rotatably arranged in the gear ring 22 and meshed with the gear ring 22, and the sun gear 25 is arranged in the middle of the planetary gears 23 and meshed with all the planetary gears 23, and the rotating shaft 8 on the inner rotor 4 of the inner rotor hub motor is fixedly connected with the sun gear 25. When the rotor 4 drives the axle to rotate, the rotor drives the sun wheel to rotate through the rotating shaft 8, and then the sun wheel drives the planet wheel to rotate, so that the purposes of reducing speed, increasing torque and driving the wheels to rotate are achieved. A heat insulation gasket 10 is arranged between the inner brake shoe 7 of the inner rotor hub motor and the outer shell 15.
The automobile hub is fixedly connected with the rotating shaft 8 through the brake drum 5, and the tire 1 and the hub of the automobile rotate together with the rotor of the hub motor. When the automobile brakes, the invention can adopt different braking modes according to different braking demands of the automobile, and the automobile can be decelerated or stopped in the shortest braking distance with the fastest time response on the premise of ensuring the braking safety. When the automobile brakes at low speed and low braking intensity, the hub motor regenerative braking does not work, and the drum brake decelerates or stops. When the regenerative braking by the in-wheel motor cannot meet the braking demand, the drum brake is decelerated or stopped. When the speed and the braking strength reach the set values, the hub motor preferentially carries out regenerative braking and braking energy recovery, and the advantages of quick response and non-contact friction are fully utilized, so that part of braking energy is shared, the abrasion of the friction brake is reduced, and the heat fading resistance of the friction brake is improved. When the regenerative braking by the in-wheel motor cannot meet the braking demand, the drum brake is decelerated or stopped.
The foregoing is merely a preferred embodiment of the invention, and it should be noted that modifications could be made by those skilled in the art without departing from the principles of the invention, which modifications would also be considered to be within the scope of the invention.

Claims (6)

1. An integrated device of an in-wheel motor and a drum brake, which is characterized in that: comprising
The hub motor comprises a rotor (4), a stator (11) and a shell (15), wherein the stator (11) is fixed in the shell (15), and the rotor (4) is arranged on the inner side of the stator (11);
drum brake structure, drum brake structure includes brake drum (5), friction disc (6), brake shoe (7) and brake motor (18), brake drum (5) rotate along with rotor (4), and two brake shoe (7) symmetrical arrangement are in the inboard of brake drum (5), and on friction disc (6) were fixed in the outer wall of brake shoe (7), set up brake motor (18) between two sets of brake shoes (7), brake motor (18) drive two brake shoes (7) move dorsad and make friction disc (6) conflict on the inner wall of brake drum (5), realize brake drum (5) braking.
2. The hub motor and drum brake assembly of claim 1, wherein: the brake shoe (7) comprises brake blocks (27), a fixed seat (17) and return springs (21), wherein the four brake blocks (27) are symmetrically arranged on the inner side of the brake drum (5) in groups, two brake blocks (27) of each group are symmetrically hinged on the fixed seat (17), and the two return springs (21) are connected between the two groups of brake blocks (27).
3. The hub motor and drum brake assembly of claim 2, wherein: the brake motor (18) is a double-shaft direct current motor or a double-shaft stepping motor, screw rods (19) are fixed on two output shafts of the brake motor (18), nuts (20) are fixed at two ends of each group of brake plates (27), and the nuts (20) are in threaded connection with the screw rods (19).
4. The hub motor and drum brake assembly of claim 1, wherein: the wheel hub motor is an outer rotor wheel hub motor, a rotor (4) of the outer rotor wheel hub motor is fixedly connected with a brake drum (5), and a heat insulation gasket (10) is arranged between the rotor (4) and the brake drum (5).
5. The hub motor and drum brake assembly of claim 1, wherein: the hub motor is an inner rotor hub motor, a gear ring (22), planetary gears (23) and a sun gear (25) are arranged in the inner rotor hub motor, the gear ring (22) is arranged on the inner side of a brake shoe (7) and is connected with a shell (15), four planetary gears (23) are rotationally arranged in the gear ring (22) and meshed with the gear ring (22), and the sun gear (25) is arranged in the middle of the planetary gears (23) and meshed with all the planetary gears (23), and a rotating shaft (8) on an inner rotor hub motor inner rotor (4) is fixedly connected with the sun gear (25).
6. The hub motor and drum brake assembly of claim 5, wherein: a heat insulation gasket (10) is arranged between the inner brake shoe (7) and the outer shell (15) of the inner rotor hub motor.
CN202310255629.XA 2023-03-16 2023-03-16 Hub motor and drum brake integrated device Withdrawn CN116526747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310255629.XA CN116526747A (en) 2023-03-16 2023-03-16 Hub motor and drum brake integrated device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310255629.XA CN116526747A (en) 2023-03-16 2023-03-16 Hub motor and drum brake integrated device

Publications (1)

Publication Number Publication Date
CN116526747A true CN116526747A (en) 2023-08-01

Family

ID=87401943

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310255629.XA Withdrawn CN116526747A (en) 2023-03-16 2023-03-16 Hub motor and drum brake integrated device

Country Status (1)

Country Link
CN (1) CN116526747A (en)

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Application publication date: 20230801