Coupling electronic mechanical braking system and vehicle

Abstract

The utility model belongs to the technical field of vehicles, and discloses a coupling electronic mechanical braking system and a vehicle, the coupling electronic mechanical braking system comprises a braking motor, a gear transmission mechanism, a parking motor, a worm and gear transmission mechanism and a switching mechanism, the braking motor increases the motor torque through a planetary gear transmission mechanism, and the output end of a planetary gear is fixedly connected with a first-stage gear; the parking braking motor is sequentially meshed with the second-stage gear and the third-stage gear and outputs braking torque through the braking output shaft, the parking braking motor increases parking braking torque through the second-stage speed reduction worm and gear mechanism and outputs the parking braking torque through the output shaft, and the third-stage gear and the second-stage worm gear share one output shaft. The braking motor and the gear transmission mechanism can be coupled or decoupled with the parking motor and the worm and gear transmission mechanism and the switching mechanism, braking safety redundancy guarantee is provided, and the integrated design of compact structure is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of coupling electronic mechanical brake system and vehicle. BACKGROUND

[0002] Electronic mechanical brake system takes motor as braking force driving source, and converts motor power into braking force by mechanical transmission mechanism, and it is the important development direction of automobile brake technology.

[0003] The current electronic mechanical brake technology has basically realized the basic function of service brake, but the redundancy safety design, miniaturization and integration still need to be improved, and there are defects such as single function, complex structure and large space.

[0004] The utility model CN220816351U discloses an electronic caliper assembly integrating service brake and electronic parking brake, which integrates service brake and parking brake on one caliper, effectively reducing vehicle space occupation and mass compared with the scheme of additionally increasing electronic parking brake caliper; and service brake and parking brake can be mutually redundant through axial transmission assembly, enhancing brake safety. The axial transmission assembly includes service transmission assembly and parking transmission assembly coaxially arranged and rotationally connected through adapter bearing, the service transmission assembly includes service gear and ball screw, the ball screw includes screw rod and service nut, the service gear is connected with the screw rod and rotates synchronously with the screw rod, and service brake motor and parking brake motor work simultaneously without decoupling design.

[0005] The previous invention patent application CN119796151A of the applicant discloses an electronic mechanical parking brake system with service brake and parking brake mutually coupled redundancy, and the parking secondary reduction input worm gear and service brake secondary reduction output gear realize coupling and decoupling, ensuring independent safety redundancy function of service brake and parking brake. However, the transmission system occupies large space and has small transmission ratio, so a device with more compact structure and higher integration is needed. SUMMARY

[0006] In view of the deficiencies of the prior art, the utility model designs a coupling electronic mechanical brake system and vehicle to provide a solution with large transmission ratio, small space occupation, compact structure and higher integration, reduce the specification of brake motor, and improve the efficiency and reliability of brake system.

[0007] To achieve the above purpose, the utility model provides the following technical scheme:

[0008] The application discloses a coupling electromechanical brake system and vehicle, which comprises a brake motor, a gear transmission mechanism, a parking motor, a worm gear transmission mechanism and a conversion mechanism. The gear transmission mechanism comprises a ring gear, a first-stage gear, a second-stage gear and a third-stage gear which are connected with each other. The worm gear transmission mechanism and the conversion mechanism comprise a first-stage worm, a first-stage worm gear, a second-stage worm and a second-stage worm gear which are connected with each other. The brake motor and the gear transmission mechanism can be coupled or decoupled with the parking motor and the worm gear transmission mechanism and the conversion mechanism.

[0009] As a preferred scheme of the coupling electromechanical brake system and vehicle, the first-stage gear of the gear transmission mechanism is fixedly connected with a planet carrier, the planet carrier is nested in a planet wheel of the ring gear, the planet wheel is engaged with a sun gear and the ring gear, and the ring gear is fixed on an assembly outer shell through a connecting key.

[0010] As a preferred scheme of the coupling electromechanical brake system and vehicle, the gear transmission mechanism outputs a brake torque through a brake output shaft, the worm gear transmission mechanism and the conversion mechanism share the brake output shaft with the gear transmission mechanism, that is, the brake torque can be output by the brake motor, the parking motor or the two motors together.

[0011] As a preferred scheme of the coupling electromechanical brake system and vehicle, the third-stage gear of the gear transmission mechanism is provided with gear end face teeth with a relative angle of 180 degrees, and the second-stage worm gear is provided with worm end face teeth with an angle of 180 degrees. Since the rotation number of the third-stage gear is less than 1 / 2, the third-stage gear and the second-stage worm gear can independently operate without interfering with each other, that is, the worm gear transmission mechanism and the conversion mechanism are decoupled with the gear transmission mechanism in terms of outputting the brake torque.

[0012] As a preferred scheme of the coupling electromechanical brake system and vehicle, the brake motor comprises a motor output shaft which is fixedly connected with the sun gear, the first-stage gear is fixedly connected with the planet carrier, and the planet carrier is nested in a cavity of the ring gear.

[0013] As a preferred scheme of the coupling electromechanical brake system and vehicle, the third-stage gear is fixedly connected with the brake output shaft and is fixed through a gear mounting bearing.

[0014] As a preferred scheme of the coupling electromechanical brake system and vehicle, the worm gear transmission mechanism and the conversion mechanism comprise a worm mounting bearing which is nested in the second-stage worm gear, the parking motor drives the second-stage worm gear through the worm gear transmission mechanism and the conversion mechanism, the third-stage gear is driven through the worm end face teeth and the gear end face teeth, and the parking brake torque is transmitted through the brake output shaft.

[0015] As a kind of preferred coupling electronic mechanical brake system and vehicle of the above, the worm gear and the conversion mechanism due to the self-locking function of worm gear itself, i.e. worm gear transmission can only be driven by worm to rotate worm gear, and worm gear cannot drive worm to rotate, can realize self-locking function when parking.

[0016] As a kind of preferred coupling electronic mechanical brake system and vehicle of the above, the brake motor or parking motor can still realize driving brake and / or parking brake when certain motor fails, which ensures the motor redundancy safety function.

[0017] As a kind of preferred coupling electronic mechanical brake system and vehicle of the above, the first-stage gear tooth surface width is greater than the second-stage gear, and the second-stage gear is fixed by gear mounting bearing at both ends.

[0018] Compared with prior art, the advantages of the utility model are:

[0019] 1, coupling and decoupling of braking torque and parking torque: brake motor and parking motor output torque through common output shaft, realize the coupling of braking torque and parking torque, and realize the decoupling of braking torque through gear transmission mechanism and worm end face gear transmission mechanism, i.e. braking torque output can be realized alone, parking braking torque output can be realized alone, or two kinds of torque are superimposed and output, to provide safety redundancy brake guarantee, to ensure that the brake system can still work normally when single motor fails.

[0020] 2, miniaturization and integration design: the utility model realizes compact integrated design by improving transmission ratio of planetary gear train, parking brake system adopts two-stage worm gear and worm transmission mechanism with large speed ratio, realizes miniaturization and integration of brake system, and meets driving brake precision and high torque demand of parking brake.

[0021] 3, energy saving and environmental protection: reverse self-locking structure of worm gear and worm is used under parking mode, without continuous power supply of motor, to improve safety and energy efficiency.

[0022] In summary, a kind of coupling electronic mechanical brake system and vehicle provide a kind of efficient, safe and rapid response brake solution by its unique design, suitable for electronic mechanical brake system of modern automobile.

[0023] The detailed structure of the utility model is further described below in combination with the drawings and specific embodiments. DRAWINGS

[0024] Fig. 1 It is the whole structure schematic view of the utility model coupling electronic mechanical brake system and vehicle;

[0025] Fig. 2The utility model discloses a coupling electronic mechanical brake system and vehicle coupling assembly structure schematic diagram;

[0026] Fig. 3 The utility model discloses planetary gear train drive assembly schematic diagram;

[0027] Among them, 1, brake motor;2, gear ring;3, first stage gear;4, second stage gear;5, third stage gear;6, second stage worm wheel;7, second stage worm;8, first stage worm wheel;9, first stage worm;10, parking motor;101, motor output shaft;21, sun gear;22, connecting key;23, planetary gear;31, planet carrier;41, gear mounting bearing;51, gear mounting bearing;52, gear end face tooth;53, brake output shaft;61, worm wheel mounting bearing;62, worm wheel end face tooth;71, worm mounting bearing. DETAILED DESCRIPTION

[0028] As Figs. 1-3 Indicated:

[0029] The utility model discloses structure principle and realized function as follows:

[0030] Brake function realization and power transmission path, brake motor passes through planetary gear transmission mechanism and increases motor torque, and the output end of planetary gear is fixedly connected with first stage gear, and is engaged with second stage gear and third stage gear in turn, and torque is further increased, and brake torque is output through brake output shaft.

[0031] Parking brake function realization and power transmission path, and parking brake motor passes through two-stage speed reduction worm gear mechanism and increases parking brake torque, and second stage worm wheel is engaged with the gear end face tooth of third stage gear through worm wheel end face tooth, and rotates and transmits parking brake torque, and power transmission output is carried out through output shaft, and parking brake force output is realized.

[0032] Third stage gear and second stage worm wheel share one brake output shaft, and brake motor and gear transmission mechanism and parking motor and worm gear transmission mechanism and conversion mechanism can be coupled or decoupled.

[0033] Specifically, gear transmission mechanism outputs brake torque through brake output shaft, and worm gear transmission mechanism and conversion mechanism and gear transmission mechanism share brake output shaft, that is, brake torque can be output through brake motor, can be output through parking motor or can be output through brake torque.

[0034] Specifically, the end of third stage gear of gear transmission mechanism is provided with gear end face tooth of relative 180 degrees, and the end of second stage worm wheel is provided with worm wheel end face tooth of 180 degrees, and since the rotation number of third stage gear is less than 1 / 2, third stage gear and second stage worm wheel can independently run and do not interfere with each other.

[0035] The first stage gear is fixedly connected with the planet carrier, the planet carrier is nested in the planetary gear of the ring gear, the planetary gear is engaged with the sun gear and the ring gear, and the ring gear is fixed on the assembly outer shell through the connecting key.

[0036] Specifically, the brake motor comprises a motor output shaft fixedly connected with the sun gear, the first stage gear is fixedly connected with the planet carrier, and the planet carrier is nested in the cavity of the ring gear. The third stage gear is fixedly connected with the brake output shaft and is fixed through the gear mounting bearing.

[0037] Through the design of the planetary gear system, the transmission ratio is increased, the motor specification is reduced, and the structural arrangement space of the transmission system is reduced, so that the system is compact, the product is miniaturized, and the weight is reduced.

[0038] Specifically, the worm gear transmission mechanism and the conversion mechanism comprise a worm gear mounting bearing nested in the second stage worm gear. The parking motor drives the second stage worm gear through the worm gear transmission mechanism and the conversion mechanism, drives the third stage gear through the worm end surface teeth and the gear end surface teeth, and transmits the parking brake torque through the brake output shaft.

[0039] Specifically, the worm gear transmission mechanism and the conversion mechanism have the self-locking function of the worm gear itself, that is, the worm gear transmission can only drive the worm gear to rotate, and the worm gear cannot drive the worm gear to rotate. Even if the vehicle is powered off, the parking torque can be maintained, and the self-locking function during parking is realized.

[0040] At the same time, when some faults occur, when the brake motor or the parking motor fails in a certain motor, the driving brake and / or the parking brake can still be realized, and the motor redundancy safety function is ensured.

[0041] Optionally, the first stage gear has a gear tooth surface width greater than that of the second stage gear, and the second stage gear is fixed through the gear mounting bearing at both ends.

[0042] The above is the specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the technical field can make equivalent replacement or change according to the technical scheme and the conception of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model claim.

Claims

1. A coupling electromechanical brake system, the system is composed of a brake motor (1), a gear transmission mechanism, a parking motor (10), a worm gear transmission mechanism and a conversion mechanism, the gear transmission mechanism is composed of a ring gear (2), a first-stage gear (3), a second-stage gear (4) and a third-stage gear (5) connected in sequence, the worm gear transmission mechanism and the conversion mechanism are composed of a first-stage worm (9), a first-stage worm gear (8), a second-stage worm (7) and a second-stage worm gear (6) connected in sequence, characterized in that, The brake motor (1) and the gear transmission mechanism are coupled with or decoupled from the parking motor (10) and the worm gear transmission mechanism and the conversion mechanism.

2. A coupled electromechanical brake system according to claim 1, wherein, The first-stage gear (3) of the gear transmission mechanism is fixedly connected with the planet carrier (31), the planet carrier (31) is nested in the planetary gear (23) of the ring gear (2), the planetary gear (23) is engaged with the sun gear (21) and the ring gear (2), and the ring gear (2) is fixed on the assembly outer shell through the connecting key (22).

3. A coupled electromechanical brake system according to claim 1, wherein The brake output shaft (53) is further included, the gear transmission mechanism outputs the brake torque through the brake output shaft (53), and the worm gear transmission mechanism and the conversion mechanism share the brake output shaft (53) with the gear transmission mechanism.

4. A coupled electromechanical brake system according to any one of claims 1-3, characterized in that, The end of the third-stage gear (5) of the gear transmission mechanism is provided with gear end face teeth (52) with a relative angle of 180 degrees, and the end of the second-stage worm gear (6) is provided with worm gear end face teeth (62) with an angle of 180 degrees, because the rotation number of the third-stage gear (5) is less than 1 / 2, the third-stage gear (5) and the second-stage worm gear (6) can independently operate and do not interfere with each other, that is, the worm gear transmission mechanism and the conversion mechanism are decoupled from the gear transmission mechanism in terms of outputting the brake torque.

5. A coupled electromechanical brake system according to any one of claims 1-3, characterized in that, The brake motor (1) includes the motor output shaft (101), which is fixedly connected with the sun gear (21), and the first-stage gear (3) is fixedly connected with the planet carrier (31), and the planet carrier (31) is nested in the cavity of the ring gear (2).

6. A coupled electromechanical brake system according to any one of claims 1-3, wherein, The third-stage gear (5) is fixedly connected with the brake output shaft (53) and is fixedly installed through the gear mounting bearing (51).

7. A coupled electromechanical brake system according to any one of claims 1-3, wherein, The worm gear transmission mechanism and the conversion mechanism include the worm gear mounting bearing (61), the worm gear mounting bearing (61) is nested in the second-stage worm gear (6), the parking motor (10) drives the second-stage worm gear (6) through the worm gear transmission mechanism and the conversion mechanism, drives the third-stage gear (5) through the worm gear end face teeth (62) and the gear end face teeth (52), and transmits the parking brake torque through the brake output shaft (53).

8. A coupled electromechanical brake system according to any one of claims 1-3, wherein, The first-stage gear (3) has a tooth face width greater than that of the second-stage gear (4), and the second-stage gear (4) is fixed at both ends through the gear mounting bearing (41).

9. A coupled electromechanical braking vehicle, characterized by, The coupling electromechanical brake system includes any one of claims 1-8.

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