CN221423753U

CN221423753U - Electronic mechanical brake for automobile

Info

Publication number: CN221423753U
Application number: CN202323058612.XU
Authority: CN
Inventors: 金勇奎; 梁培根
Original assignee: Aihe Automobile Shanghai Co ltd
Current assignee: Aihe Automobile Shanghai Co ltd
Priority date: 2023-11-13
Filing date: 2023-11-13
Publication date: 2024-07-26
Anticipated expiration: 2033-11-13

Abstract

The utility model discloses an electronic mechanical brake for an automobile, which comprises an electronic mechanical brake mechanism and a transmission mechanism, wherein the electronic mechanical brake mechanism comprises a power-off brake assembly, a position sensor assembly, a motor assembly, a planetary transmission mechanism, a bevel gear transmission mechanism, a screw assembly, a brake caliper and a friction plate, and the power-off brake assembly comprises a power-off brake and a power-off brake seat. According to the utility model, through the arrangement of the electromechanical brake mechanism, the electromechanical brake directly drives the mechanical device to clamp the brake caliper by adopting the motor, so that the response time of the brake is shortened, the response is quicker, and the braking distance can be effectively reduced; the motor has better controllability, the braking force control is more accurate, and better front and rear braking force distribution can be met; the number of parts of the electromechanical brake is reduced, the arrangement of a pipeline is reduced by transmitting energy through a circuit, and the occupied arrangement space is reduced; and the assembly process is simplified, and the production efficiency is higher.

Description

Electronic mechanical brake for automobile

Technical Field

The utility model relates to the technical field of automobile brakes, in particular to an electronic mechanical brake for an automobile.

Background

The braking performance of the automobile is directly related to the safety of life and property, and good braking performance is the basic guarantee of safe running of the automobile; along with the rapid development of the intellectualization and the electrodynamic property in the field of commercial vehicles in the automobile industry, the intelligent driving is expected to fall to the ground preferentially in a specific scene of the commercial vehicle, and higher requirements are provided for the braking performance.

The prior commercial vehicle widely adopts a pneumatic braking system, and the current pneumatic braking system has been developed to an electronic control pneumatic braking system EBS; the pneumatic braking system mainly comprises an air compressor, an air processing unit, an air storage cylinder, a valve, a pipeline, a pneumatic brake and the like, generates and transmits compressed air, and finally brakes through a pneumatic drive brake; the response speed of the pneumatic braking system is slower than that of a hydraulic braking system widely applied by a passenger car, and the braking distance is relatively longer; the pneumatic braking system has the advantages of large number of parts, large volume of the air cylinder, complex pipeline arrangement and poor practicality in occupying arrangement space; in order to solve the above problems, an electromechanical brake for an automobile has been proposed.

Disclosure of utility model

The utility model mainly solves the technical problems existing in the prior art and provides an electronic mechanical brake for an automobile.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an electromechanical brake for car, includes electromechanical brake mechanism and drive mechanism, electromechanical brake mechanism includes power-off brake assembly, position sensor assembly, motor assembly, planetary drive mechanism, bevel gear drive mechanism, lead screw assembly, brake caliper, friction disc, power-off brake assembly includes power-off brake, power-off brake seat, motor assembly includes motor housing, motor stator, motor rotor, motor axis of rotation, motor output shaft, motor bearing, the inner circle of power-off brake is fixed on motor output shaft, and the outer lane is fixed on power-off brake seat, and there is the friction disc in power-off brake's inside, utilizes the electro-magnet principle, controls the actuation of friction disc through DC power supply to control power transmission's separation and braking.

Preferably, the position sensor assembly comprises a position sensor and a position sensor seat, the position sensor is fixedly connected with the position sensor seat, an inner ring of the position sensor is fixed on a motor rotating shaft, and an outer ring of the position sensor is fixed on the position sensor seat.

Preferably, the transmission mechanism comprises a planetary transmission mechanism and a bevel gear transmission mechanism, the planetary transmission mechanism comprises a sun gear, a planetary pinion, a gear ring shell, a planet carrier and a planet carrier support bearing, the bevel gear transmission mechanism comprises a bevel pinion, a bevel gear shell, a fastening bolt, a compression spring and a gasket, an output shaft of the motor is meshed with the sun gear, the sun gear of the planetary transmission mechanism is a transmission mechanism input end, and the planetary pinion is supported on a shaft on the planet carrier through a needle bearing.

Preferably, the fastening bolt is arranged in the planet carrier, the fastening bolt is in threaded connection with the planet carrier, the fastening bolt of the hollow shaft section of the planet carrier is screwed, and the compression spring is compressed, so that the gasket and the small bevel gear are pressed on the large bevel gear.

Preferably, the screw assembly comprises a screw shaft, a screw nut, a thrust bearing, an angular contact bearing, a belleville spring and a pin shaft, wherein the screw nut is fixedly connected with the large bevel gear, part of the screw consists of a screw shaft, the screw nut, a roller and the like, and when the screw roller is a roller, the screw is a planetary roller screw; when the screw roller is a ball, the screw is a ball screw.

Preferably, the tail end of the screw shaft is in a piston shape, the friction plate is arranged on one side of the tail end of the screw shaft, the tail end of the screw shaft is processed into a piston shape for pushing the friction plate, a hole is formed in the piston, and the pin shaft is arranged in the hole.

Compared with the prior art, the utility model has the following beneficial effects:

1. According to the utility model, through the arrangement of the electromechanical brake mechanism, the electromechanical brake directly drives the mechanical device to clamp the brake caliper by adopting the motor, so that the response time of the brake is shortened, the response is quicker, and the braking distance can be effectively reduced; the motor has better controllability, the braking force control is more accurate, and better front and rear braking force distribution can be met; the number of parts of the electromechanical brake is reduced, the arrangement of a pipeline is reduced by transmitting energy through a circuit, and the occupied arrangement space is reduced; and the assembly process is simplified, and the production efficiency is higher.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of the present utility model in elevation;

FIG. 2 is a schematic side view of the present utility model;

FIG. 3 is a schematic top view of the present utility model;

FIG. 4 is a schematic view of the whole structure of the utility model in a lower view;

FIG. 5 is a schematic diagram of the overall explosion configuration in elevation of the present utility model;

fig. 6 is a schematic diagram of the structure of the present utility model in front section.

In the figure: 1. a power-off brake assembly; 1.1, a power-off brake; 1.2, a power-off brake seat; 2. a position sensor assembly; 2.1, a position sensor; 2.2, a position sensor seat; 3. a motor assembly; 3.1, a motor shell; 3.2, a motor stator; 3.3, a motor rotor; 3.4, a motor rotating shaft; 3.5, motor bearings; 3.6, a motor output shaft; 4. a planetary transmission mechanism; 4.1, sun gear; 4.2, planet pinions; 4.3, gear ring shell; 4.4, a planet carrier; 4.5, a planet carrier support bearing; 5. bevel gear drive mechanism; 5.1, bevel pinion; 5.2, big bevel gears; 5.3, bevel gear housing; 5.4, fastening bolts; 5.5, compressing the spring; 5.6, a gasket; 6. a screw assembly; 6.1, a screw rod shaft; 6.2, a screw nut; 6.3, thrust bearings; 6.4, an angular contact bearing; 6.5, a belleville spring; 6.6, a pin shaft; 7. a brake caliper; 8. friction plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-6, an electromechanical brake for an automobile comprises an electromechanical brake mechanism and a transmission mechanism, wherein the electromechanical brake mechanism comprises a power-off brake assembly 1, a position sensor assembly 2, a motor assembly 3, a planetary transmission mechanism 4, a bevel gear transmission mechanism 5, a screw assembly 6, a brake caliper 7 and a friction plate 8, the power-off brake assembly 1 comprises a power-off brake 1.1 and a power-off brake seat 1.2, the motor assembly 3 comprises a motor shell 3.1, a motor stator 3.2, a motor rotor 3.3, a motor rotating shaft 3.4, a motor output shaft 3.6 and a motor bearing 3.5, an inner ring of the power-off brake 1.1 is fixed on the motor output shaft 3.6, an outer ring is fixed on the power-off brake seat 1.2, and the electromechanical brake directly drives a mechanical device to clamp a brake caliper 7 by a motor, so that the response time of the brake is shortened, the response is quicker, and the braking distance can be effectively reduced; the motor has better controllability, the braking force control is more accurate, and better front and rear braking force distribution can be met; the number of parts of the electromechanical brake is reduced, the arrangement of a pipeline is reduced by transmitting energy through a circuit, and the occupied arrangement space is reduced; the assembly process is simplified, and the production efficiency is higher; because the electronic mechanical brake system has obvious advantages compared with the pneumatic brake system, the electronic mechanical brake system can be used for replacing a pneumatic brake of a commercial vehicle, has rapid development in recent years, is applicable to urgent market demand of the electronic mechanical brake technology of the commercial vehicle, and has wide prospect; however, the electronic mechanical brake has different compositions and different shapes from the pneumatic brake, so the invention discloses the electronic mechanical brake with the shape close to the pneumatic brake and the outline smaller than that of the pneumatic brake with the same specification; when the electronic mechanical brake is used for replacing a pneumatic brake, the electronic mechanical brake has no interference with peripheral parts of the brake, and less automobile design change is realized, so that the improvement and the improvement of the existing automobile type are facilitated, and the popularization and the application of the electronic mechanical brake technology in commercial vehicles are accelerated; the device mainly aims at an electronic mechanical brake with the outer contour smaller than that of the existing pneumatic brake so as to replace the existing pneumatic brake; the invention provides the electromechanical brake with the appearance close to the pneumatic brake and the outline smaller than that of the pneumatic brake with the same specification, which reduces the design change amount of the automobile when replacing the pneumatic brake and accelerates the popularization and application of the electromechanical brake technology in commercial vehicles.

In one aspect of the embodiment, the power-off brake assembly 1 is a power-off brake 1.1, a friction disc is arranged in the power-off brake assembly, the attraction of the friction disc is controlled by a direct current power supply according to the electromagnet principle, so that the separation and the braking of power transmission are controlled, the inner ring of the power-off brake 1.1 is fixed on a motor output shaft 3.6, and the outer ring is fixed on a power-off brake seat 1.2; the power-off brake 1.1 is connected with the electromechanical brake controller, and when the power-on is performed, the friction disc in the power-off brake 1.1 is separated, so that the motor output shaft 3.6 is allowed to output power; when the power is off, the friction disc in the power-off brake 1.1 is sucked and braked, the motor output shaft 3.6 is locked tightly, the sensor is a position sensor 2.1 for driving and controlling the brushless motor, and the sensor such as a Hall position sensor, a photoelectric encoder and the like can be adopted; the inner ring of the position sensor 2.1 is fixed on the motor rotating shaft 3.4, and the outer ring is fixed on the position sensor seat 2.2; the position sensor 2.1 is connected to a motor drive unit of the electromechanical brake controller.

In one aspect of the embodiment, the motor assembly 3 is composed of a motor shell 3.1, a motor stator 3.2, a motor rotor 3.3, a motor rotating shaft 3.4, a motor output shaft 3.6, a motor bearing 3.5 and the like, wherein the motor is a hollow frameless moment motor, the motor stator 3.2 is bonded with the inner wall of the motor shell 3.1 through an adhesive, the motor rotor 3.3 is bonded with the motor rotating shaft 3.4 through the adhesive, the mounting positions of the motor stator 3.2 and the motor rotor 3.3 correspond to each other, the outer side of the motor output shaft 3.6 is fixedly connected with the motor rotating shaft 3.4 in an interference fit manner, and the outer side tail ends are respectively used for mounting a motor position sensor 2.1 and a power-off brake 1.1; two deep groove ball bearings are arranged on the middle section of the output shaft and used for supporting, the inner ring of the motor bearing 3.5 is matched with the motor output shaft 3.6, and the outer ring of the motor bearing 3.5 is matched with the inner wall extending out of the motor shell 3.1; the inner end of the motor output shaft 3.6 is provided with a hole for connecting with the sun gear 4.1 of the planetary transmission mechanism 4.

In one aspect of the embodiment, the transmission mechanism is composed of a primary planetary transmission mechanism 4 and a primary bevel gear transmission mechanism 5, a shell and the like, the planetary transmission mechanism 4 is composed of a sun gear 4.1 with external teeth, a plurality of planetary pinions 4.3 with external teeth, a gear ring shell 4.2 with internal teeth, a planet carrier 4.4, a planet carrier support bearing 4.5 and the like, wherein the primary bevel gear transmission mechanism 5 is composed of a small bevel gear 5.1, a big bevel gear 5.2, a bevel gear shell 5.3 and the like, the sun gear 4.1 of the planetary transmission mechanism 4 is a transmission mechanism input end, is fixed in an interference fit with a middle hole at the tail end of a motor output shaft 3.6, and is meshed with the sun gear 4.1; the planet pinion 4.3 is supported on a shaft on the planet carrier 4.4 by a needle bearing and meshes with internal teeth in the ring gear housing 4.2; the planet carrier 4.4 is a transmission mechanism output end, and extends out of a hollow shaft section, two angular contact bearings 6.4 are arranged at the middle section of the shaft section and used for supporting, and a bevel gear 5.1 for bevel gear transmission is arranged at the tail end of the shaft section; the hollow shaft section of the planet carrier 4.4 is provided with a compression spring 5.5, a gasket 5.6 and a fastening bolt 5.4, the gasket 5.6 is connected with a bevel pinion 5.1, an included angle is formed between two transmission shafts of the bevel gear transmission mechanism 5, the included angle is between 0 and 90 degrees, the typical value is 12 degrees, and the included angle is arranged in a bevel gear shell 5.3; the bevel pinion 5.1 is fixed at the tail end of the shaft section of the planet carrier 4.4 and transmits power from the planetary transmission mechanism 4 to bevel gear transmission; the big bevel gear 5.2 is fixed on the screw nut 6.2; the small bevel gear 5.1 is meshed with the large bevel gear 5.2; to eliminate gear engagement play due to manufacturing and assembly errors, the tightening bolts 5.4 of the hollow shaft section of the planet carrier 4.4 are screwed, the compression springs 5.5 being compressed, thereby pressing the shims 5.6 and the small bevel gears 5.1 against the large bevel gears 5.2.

In one aspect of the present embodiment, the lead screw assembly 6 is comprised of a lead screw shaft 6.1, a belleville spring 6.5, a thrust bearing 6.3, an angular contact bearing 6.4, etc., wherein the lead screw is comprised of a lead screw shaft 6.1, a lead screw nut 6.2, rollers, etc.; when the screw rod roller is a roller, the screw rod is a planetary roller screw rod; when the screw roller is a ball, the screw is a ball screw. The planetary roller screw has stronger bearing capacity and small outline dimension, but has relatively higher cost, and is suitable for a brake of a heavy commercial vehicle; the ball screw has the advantages of general bearing capacity, relatively large external dimension and relatively low cost, is suitable for a light commercial vehicle brake, and is fixedly provided with a large bevel gear 5.2 in the middle section of a screw nut 6.2, and the inner side and the outer side of the large bevel gear are supported by a planet carrier support bearing 4.5; the inner shaft section is supported by an angular contact bearing 6.4, the inner ring of a planet carrier support bearing 4.5 is fixed on a screw nut 6.2, and the outer ring of the planet carrier support bearing 4.5 is fixed on a caliper bearing seat; the outboard shaft section is supported by a thrust bearing 6.3 and under the spring force of a pair of compressed belleville springs 6.5, the nut shoulder presses against the thrust bearing 6.3. The screw nut 6.2 is supported by the thrust bearing 6.3 and the angular contact bearing 6.4; the tail end of the screw shaft 6.1 is processed into a piston shape for pushing the friction plate 8; the piston is provided with a hole, the pin shaft 6.6 is pressed in, and the pin shaft 6.6 is in clearance fit with the corresponding hole of the friction plate 8, so that the screw shaft 6.1 is prevented from rotating in braking.

The working principle of the utility model is as follows: when the electromechanical brake for the automobile is used and is used for service braking, the power-off brake 1.1 is electrified, the internal friction disc is separated, and the motor output shaft 3.6 is allowed to output power; the electronic mechanical brake controller obtains the relative position of a motor according to the position sensor 2.1, drives and controls the frameless torque motor to realize the rotary motion of the motor, the motor power passes through the planetary transmission mechanism 4 and the bevel gear transmission mechanism 5 of the transmission mechanism to drive the screw nut 6.2 to rotate, the screw shaft 6.1 stretches out to push the friction plate 8, the brake disc is gradually contacted with the friction plate 8, and finally the brake caliper 7 is clamped by a certain clamping force to realize service braking; when in parking braking, the power-off brake 1.1 is electrified, the working principle is the same as that of service braking, and the brake caliper 7 is clamped by a certain clamping force; then the electronic mechanical brake controller controls the power-off brake 1.1 to power off, the friction disc inside the power-off brake 1.1 is in suction braking, the motor output shaft 3.6 is locked tightly, the transmission mechanism is not rotated any more, and therefore the brake calipers 7 are maintained in a clamping state for a long time, and all electric equipment in the scheme is powered through an external power supply.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An electromechanical brake for an automobile, comprising an electromechanical brake mechanism and a transmission mechanism, characterized in that: the electronic mechanical brake mechanism comprises a power-off brake assembly (1), a position sensor assembly (2), a motor assembly (3), a planetary transmission mechanism (4), a bevel gear transmission mechanism (5), a screw assembly (6), a brake caliper (7) and a friction plate (8), the power-off brake assembly (1) comprises a power-off brake (1.1) and a power-off brake seat (1.2), the motor assembly (3) comprises a motor shell (3.1), a motor stator (3.2), a motor rotor (3.3), a motor rotating shaft (3.4), a motor output shaft (3.6) and a motor bearing (3.5), an inner ring of the power-off brake (1.1) is fixed on the motor output shaft (3.6), and an outer ring of the power-off brake is fixed on the power-off brake seat (1.2).

2. An electromechanical brake for a vehicle in accordance with claim 1, wherein: the position sensor assembly (2) comprises a position sensor (2.1) and a position sensor seat (2.2), and the position sensor (2.1) is fixedly connected with the position sensor seat (2.2).

3. An electromechanical brake for a vehicle in accordance with claim 1, wherein: the transmission mechanism comprises a planetary transmission mechanism (4) and a bevel gear transmission mechanism (5), the planetary transmission mechanism (4) comprises a sun gear (4.1), a planetary pinion (4.3), a gear ring shell (4.2), a planet carrier (4.4) and a planet carrier support bearing (4.5), the bevel gear transmission mechanism (5) comprises a bevel pinion (5.1), a bevel gear (5.2), a bevel gear shell (5.3), a fastening bolt (5.4), a compression spring (5.5) and a gasket (5.6), and the motor output shaft (3.6) is meshed with the sun gear (4.1).

4. An electromechanical brake for a vehicle according to claim 3, wherein: the fastening bolt (5.4) is arranged in the planet carrier (4.4), and the fastening bolt (5.4) is in threaded connection with the planet carrier (4.4).

5. An electromechanical brake for a vehicle in accordance with claim 1, wherein: the screw assembly (6) comprises a screw shaft (6.1), a screw nut (6.2), a thrust bearing (6.3), an angular contact bearing (6.4), a butterfly spring (6.5) and a pin shaft (6.6), and the screw nut (6.2) is fixedly connected with the large bevel gear (5.2).

6. An electromechanical brake for a vehicle in accordance with claim 5, wherein: the tail end of the screw shaft (6.1) is in a piston shape, and the friction plate (8) is arranged on one side of the tail end of the screw shaft (6.1).