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Electronic brake booster

A booster and motor rotor technology, applied in the field of brake devices, can solve the problems of not being suitable for practical application, increasing the weight of the whole vehicle, and increasing the weight of the booster

Active Publication Date: 2021-09-10
ZHEJIANG SANXING MECHANICAL & ELECTRONICSAL STOCK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the electric power-assisted braking system uses electronic control of the brake booster, and the power generated by the motor is assisted by a transmission system such as a worm gear and a rack-and-pinion transmission mechanism, and the transmission efficiency is low; when the transmission force is large, the rack-and-pinion transmission will produce A certain bias moment will increase the wear of the transmission mechanism and reduce the service life
Alternatively, the motor generates power through the planetary gear train to drive the trapezoidal screw to push the master cylinder to generate power. This system has many transmission parts, low efficiency and low reliability; too many transmission parts will increase the weight and size of the booster. It is complex and difficult to manufacture and assemble, which is not suitable for practical applications; or, the output force of the direct drive motor is small, in order to achieve the same output force, the speed needs to be increased to achieve the same output force, so it is difficult to accurately control and cause large vibration and Noise, at the same time, the larger volume is not conducive to installation and increases the weight of the vehicle

Method used

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Experimental program
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Embodiment 1

[0035] Such as Figure 1 to Figure 4 As shown, an electronically controlled brake booster for use in a vehicle braking system according to an embodiment of the present invention includes a housing, which may be made of any suitable material, for example, stamped from sheet metal like a conventional vacuum booster production. The shell is composed of two parts, the front shell 1 and the rear shell 22, and the front shell 1 and the rear shell 22 are connected and fastened by suitable fixing devices to form a whole. Preferably, the front shell 1 and the rear shell 22 are coaxial shell structures with a circular cross-section having approximately the same radius, and the two are connected by bolts.

[0036] The shell can be mounted to the vehicle body by suitable fixtures or structures. A motor is fixedly installed in the front housing 1, and the motor is composed of a stator 2 and a rotor 3, wherein the stator 2 is fixedly installed on the inner peripheral wall of the front hou...

Embodiment 2

[0053] Such as Figure 5 to Figure 7 As shown, in this embodiment, the rotor 3 is rotatably coaxially installed in the front housing 1 through the bearing seat, and the rotor 3 is coaxially fixed with a nut sleeve 4, and the rotor 3 is non-rotatably fixed with the nut sleeve 4 through the connecting arm. connect. When the rotor 3 rotates, the nut sleeve 4 rotates synchronously with the rotor 3 .

[0054] The nut sleeve 4 is provided with a screw rod 5 that can rotate relative to the nut sleeve 4 , and the screw rod 5 and the nut sleeve 4 are arranged coaxially. In the initial state, one end of the screw rod 5 is threadedly connected with the nut sleeve 4 , and the other end protrudes from the front casing 1 in the axial direction and extends outward. The end of the screw rod 5 near the brake master cylinder 15 is fixedly equipped with a positioning support frame 23, and the positioning support frame 23 is sleeved and installed on the support rod 24 on the rear housing 22. Th...

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Abstract

The invention discloses an electronic brake booster which is characterized in that operating force is transmitted to a push rod capable of axially moving of a brake master cylinder, a motor and a circumferential rotating axial translation device, the circumferential rotating axial translation device is connected with a motor rotor in a matched mode, and circumferential rotation of the motor rotor is converted into axial movement of the circumferential rotating axial translation device. The electronic brake booster is characterized in that the motor rotor is arranged at the end part of the circumferential rotating axial translation device. According to the electronic brake booster, the installation space is saved, the weight of the whole vehicle is reduced, the brake control precision is improved, and the relatively low rotating speed means small vibration, low noise and good driving experience.

Description

technical field [0001] The invention belongs to the technical field of brake devices, and in particular relates to an electronic brake booster. Background technique [0002] At present, the electric power-assisted braking system uses electronic control of the brake booster, and the power generated by the motor is assisted by a transmission system such as a worm gear and a rack-and-pinion transmission mechanism, and the transmission efficiency is low; when the transmission force is large, the rack-and-pinion transmission will produce A certain bias moment will increase the wear of the transmission mechanism and reduce the service life. Alternatively, the motor generates power through the planetary gear train to drive the trapezoidal screw to push the master cylinder to generate power. This system has many transmission parts, low efficiency and low reliability; too many transmission parts will increase the weight and size of the booster. It is complex and difficult to manufac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T13/74
CPCB60T13/745
Inventor 蔡清理温正荣李显彰陈奎
Owner ZHEJIANG SANXING MECHANICAL & ELECTRONICSAL STOCK