Regenerative braking device of electric truck

Abstract

The utility model discloses a regenerative braking device of an electric truck, and belongs to the technical field of braking of new energy commercial vehicles. The electric control system is provided with a brake pedal unit which is in circuit connection with a vehicle control unit and a driving motor electric control system. A rotating shaft capable of rotating relative to the mounting seat is mounted on one side of the mounting seat; the mechanical air brake valve body is fixedly connected to the other side of the mounting seat; wherein the rotating shaft is fixedly connected with a brake pedal and a mechanical pneumatic brake ejector rod which can rotate along with the rotating shaft; the electronic sensor is in circuit connection with the vehicle control unit; a through hole is formed in the position, corresponding to the mechanical air brake ejector rod, of the mounting seat, so that when the brake pedal is treaded to an idle stroke A through the through hole, the mechanical air brake ejector rod and a contact on the mechanical air brake valve body generate an idle stroke B, and the mechanical air brake ejector rod and the contact on the mechanical air brake valve body generate an idle stroke B; according to the utility model, the problems of less motor regenerative braking recovery and more mechanical pneumatic braking caused by simultaneous operation of mechanical pneumatic braking and motor regenerative braking are effectively solved, and the purposes of energy conservation and consumption reduction are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy commercial vehicle brake technical field especially relates to a kind of electric truck feedback braking device. BACKGROUND

[0002] New energy commercial vehicle adopts drive motor feedback braking (hereinafter referred to as motor feedback braking) to realize vehicle braking energy recovery, which is an effective method to increase the driving range of new energy commercial vehicle. When the vehicle brakes, motor feedback braking is preferred, and mechanical air brake is started again when motor feedback braking cannot meet the whole vehicle braking demand. This method not only improves the driving range of new energy commercial vehicle, but also reduces the mechanical wear of air brake of new energy commercial vehicle, improves vehicle safety and saves the cost of whole vehicle.

[0003] Prior art status: The braking torque of new energy commercial vehicle is realized by mechanical air brake and motor feedback braking. Currently, when the vehicle brakes, the torque distribution of mechanical air brake and motor feedback braking mainly has two methods. One method is to configure EBS electronic brake system for the vehicle, and to realize the torque distribution of mechanical air brake and motor feedback braking through EBS system. This method needs to increase the cost of about 2000 yuan, and needs complex calibration process. The second method is that mechanical air brake and motor feedback braking are both distributed according to the opening degree of brake pedal. In this method, mechanical air brake and motor feedback braking work at the same time, the braking energy recovered by motor feedback braking is less, and the mechanical air brake wears more. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the defects in the prior art, and provides an electric truck feedback braking device to separate the control of motor feedback braking and mechanical air brake on one brake pedal, in order to solve the problems that motor feedback braking recovers less braking energy and mechanical air brake wears more due to the torque distribution of mechanical air brake and motor feedback braking according to the opening degree of brake pedal.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] The utility model discloses an electric truck feedback braking device, which comprises:

[0007] A brake pedal unit connected with the whole vehicle controller and the drive motor electronic control system circuit:

[0008] The brake pedal unit comprises:

[0009] A mounting seat having a rotating shaft capable of rotating relative to the mounting seat on one side;

[0010] A mechanical air brake valve body fixedly connected to the other side of the mounting seat;

[0011] Wherein, the rotation shaft is fixedly connected with a brake pedal and a mechanical air brake ejector rod capable of rotating along with the rotation shaft.

[0012] An electronic sensor connected with the vehicle controller circuit;

[0013] The mounting seat is provided with a through hole corresponding to the position of the mechanical air brake ejector rod, so that when the brake pedal is depressed to the idle stroke A, the mechanical air brake ejector rod and the contact on the mechanical air brake valve body generate an idle stroke B through the through hole.

[0014] Further, a reset spring is arranged to drive the brake pedal to reset.

[0015] The reset spring is arranged on the side of the rotation shaft away from the mechanical air brake ejector rod.

[0016] Further, the voltage signal output by the electronic sensor increases as the opening of the brake pedal increases.

[0017] Further, when the stroke of the brake pedal is less than A, only motor feedback braking is provided without mechanical air braking, when the stroke of the brake pedal is equal to A, the motor feedback braking torque is set to be the maximum feedback braking torque of the driving motor.

[0018] In the above technical solution, the electrically driven truck feedback braking device has the following beneficial effects:

[0019] The electrically driven truck feedback braking device has the rotation shaft fixedly connected with the brake pedal and the mechanical air brake ejector rod capable of rotating along with the rotation shaft, the mechanical air brake ejector rod passes through the through hole, when the brake pedal is depressed to the idle stroke A, the mechanical air brake ejector rod and the contact on the mechanical air brake valve body generate the idle stroke B, the brake pedal stroke is controlled, the voltage signal output by the electronic sensor is used, the motor feedback braking signal and the mechanical air braking signal are separately controlled, the motor feedback braking is realized first, and then the mechanical air braking is realized, the problem of less motor feedback braking and more mechanical air braking is solved, and the purpose of energy saving and consumption reduction is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art according to these drawings.

[0021] Figure 1It is the utility model discloses a kind of electric truck feedback braking device structural schematic diagram;

[0022] Figure 2 It is the utility model discloses a kind of electric truck feedback braking device brake pedal unit structural schematic diagram (x is right view, y is front view).

[0023] Mark explanation:

[0024] 100, brake pedal unit;200, vehicle controller;300, drive motor electric control system;

[0025] 1, electronic sensor;2, mechanical air brake valve body;3, brake pedal;4, reset spring;5, rotating shaft;6, mechanical air brake ejector rod;7, mounting seat. Specific implementation

[0026] In order to make the skilled in the art better understand the technical scheme of the utility model, the utility model will be further described in detail in conjunction with the drawings below.

[0027] Referring to Figure 1 As shown in the figure;

[0028] The utility model discloses a kind of electric truck feedback braking device, comprising: brake pedal unit 100, vehicle controller (VCU) 200, drive motor electric control system 300;

[0029] Brake pedal unit 100 is exported to vehicle controller 200 after separating motor feedback braking signal and mechanical air brake signal, and vehicle controller 200 controls drive motor electric control system 300 drive motor feedback braking torque and drive power according to brake pedal opening size;

[0030] Wherein, brake pedal unit 100 includes: electronic sensor 1, mechanical air brake valve body 2, brake pedal 3, reset spring 4, rotating shaft 5, mechanical air brake ejector rod 6, mounting seat 7;

[0031] One side of mounting seat 7 is installed rotating shaft 5 by lug plate, and rotating shaft 5 can make rotary motion relative to mounting seat 7, and the other side of mounting seat 7 is installed mechanical air brake valve body 2;

[0032] Rotating shaft 5 is fixedly connected with brake pedal 3 and mechanical air brake ejector rod 6 capable of rotating with it, and mounting seat 7 is provided with through hole corresponding to the position of mechanical air brake ejector rod 6, and when stepping brake pedal 3 to idle stroke A, mechanical air brake ejector rod 6 and the contact point on mechanical air brake valve body 2 generate idle stroke B through the through hole;

[0033] Rotating shaft 5 is fixedly connected with electronic sensor 1 on the side of mechanical air brake ejector rod 6 away from brake pedal 3, and electronic sensor 1 is circuit-connected with vehicle controller 200.

[0034] Preferably, the voltage signal outputted by the electronic sensor 1 increases as the opening of the brake pedal 3 increases.

[0035] Preferably, the stroke of the brake pedal 3 is less than A, only the motor feedback braking without mechanical air braking, the stroke of the brake pedal 3 is zero, the motor feedback braking torque is set to zero, the stroke of the brake pedal 3 is equal to A, and the motor feedback braking torque is set to the maximum feedback braking torque of the driving motor.

[0036] Preferably, the rotating shaft 5 is provided with a reset spring 4 on the side away from the air braking top rod of the brake pedal 3, and is used for driving the reset of the brake pedal 3.

[0037] In the above technical scheme, the working principle of the feedback braking device of the electrically-powered truck is as follows.

[0038] Referring to Figure 2 , the feedback braking device of the electrically-powered truck comprises a brake pedal 3, a rotating shaft 5, a mechanical air braking top rod 6, a mechanical air braking valve body 2, an electronic sensor 1 and a driving motor 8.

[0039] Firstly, the rotating shaft 5 is fixed on a mounting seat 7, the brake pedal 3 is fixed on the rotating shaft 5, the brake pedal 3 drives the rotating shaft 5 to rotate through up-and-down action, and the opening of the brake pedal 3 is in proportional relationship with the rotating angle of the rotating shaft 5.

[0040] Secondly, the mechanical air braking top rod 6 is fixed on the rotating shaft 5 and rotates with the rotating shaft 5. An idle stroke B is reserved between the mechanical air braking top rod 6 and the mechanical air braking valve body 2, and corresponds to the idle stroke A of the brake pedal 3. The stroke of the brake pedal 3 is less than the stroke A, the mechanical air braking top rod 6 does not contact the mechanical air braking valve body 2, and the mechanical air braking does not work. The stroke of the brake pedal 3 is greater than the stroke A, the mechanical air braking top rod 6 pushes the mechanical air braking valve body 2, and controls the mechanical air braking to work.

[0041] The electronic sensor 1 is fixed on the rotating shaft 5, and the voltage signal outputted by the electronic sensor 1 is in proportional relationship with the opening of the brake pedal 3. The greater the opening of the brake pedal 3, the greater the voltage value outputted by the electronic sensor 1.

[0042] The stroke of the brake pedal 3 is less than A, only the motor feedback braking without mechanical air braking. When the brake pedal 3 is not stepped on, the motor feedback braking torque is set to zero, and when the stroke of the brake pedal 3 is equal to A, the motor feedback braking torque is set to the maximum feedback braking torque of the driving motor.

[0043] The motor feedback braking signal and the mechanical air braking signal are separated and controlled through the brake pedal 3, the feedback braking method of the motor feedback braking first and the mechanical air braking later is realized, the problem of less motor feedback braking and more mechanical air braking is solved, and the purpose of energy saving and consumption reduction is achieved.

[0044] The above has only described certain exemplary embodiments of the present application by way of illustration, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the present application for those skilled in the art. Therefore, the above drawings and descriptions are illustrative in nature, and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. An electric truck feedback braking device, comprising: a brake pedal unit (100) connected with the vehicle controller (200) and the drive motor electronic control system (300), characterized in that: the brake pedal unit (100) comprises: a mounting seat (7) having a rotating shaft (5) capable of rotating relative to the mounting seat (7) on one side; a mechanical air brake valve body (2) fixed to the other side of the mounting seat (7); wherein the rotating shaft (5) is fixed with a brake pedal (3) and a mechanical air brake ejector rod (6) capable of rotating with it; and an electronic sensor (1) connected with the vehicle controller (200); the mounting seat (7) is provided with a through hole corresponding to the position of the mechanical air brake ejector rod (6), so that when the brake pedal (3) is depressed to the idle stroke A, the mechanical air brake ejector rod (6) and the contact point on the mechanical air brake valve body (2) generate an idle stroke B through the through hole.

2. A regenerative braking system for an electrically powered truck as defined in claim 1, wherein ； Further comprising a reset spring (4) for driving the brake pedal (3) to reset; the rotating shaft (5) is provided with the reset spring (4) on the side away from the mechanical air brake ejector rod (6).

3. A regenerative braking system for an electrically powered truck as defined in claim 1, wherein ； The voltage signal output by the electronic sensor (1) increases as the opening of the brake pedal (3) increases.

4. A regenerative braking device for an electrically powered truck as defined in claim 3, characterized in that; the stroke of the brake pedal (3) is less than A, only motor feedback braking without mechanical air braking, the stroke of the brake pedal (3) is less than A is zero, the motor feedback braking torque is set to zero, the stroke of the brake pedal (3) is equal to A, the motor feedback braking torque is set to the maximum feedback braking torque of the drive motor.

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