阅读说明：本技术 制动踏板主动操纵装置 (Active brake pedal operating device ) 是由 李世超 张磊 潘洪江 尚永明 武书扬 王宝军 魏国军 侯长波 于 2019-11-07 设计创作，主要内容包括：本发明提供了一种制动踏板主动操纵装置,包括踏板组件、电机组件、连接踏板组件和电机组件的钢缆以及用于改变钢缆方向的滑轮组件；步进电机以指定转速转动指定角度,带动驱动轮转动,驱动轮使一端固定在其上的钢缆开始沿钢缆槽缠绕,通过滑轮组件的导向作用,另一端固定在踏板组件上的钢缆开始向滑轮组件的方向拉动制动踏板,从而产生制动力,当需要释放制动力时,电机饭庄靠制动踏板的回位力拉回钢缆,钢缆从驱动轮上解除缠绕；本发明结构小巧紧凑,不与制动踏板发生干涉,不影响最大制动力的产生,采用螺旋式单圈钢缆缠绕驱动轮,可有效防止钢缆缠绕卡死造成的线控失效,可以实现对制动踏板迅速、敏捷和精准的操纵。(The invention provides an active operating device of a brake pedal, which comprises a pedal component, a motor component, a steel cable for connecting the pedal component and the motor component, and a pulley component for changing the direction of the steel cable; the stepping motor rotates a designated angle at a designated rotating speed to drive the driving wheel to rotate, the driving wheel enables a steel cable with one end fixed on the driving wheel to start to wind along a steel cable groove, the steel cable with the other end fixed on the pedal component starts to pull the brake pedal towards the direction of the pulley component through the guiding action of the pulley component, so that the braking force is generated, when the braking force needs to be released, the motor restaurant pulls back the steel cable by the return force of the brake pedal, and the steel cable releases the winding from the driving wheel; the invention has small and compact structure, does not interfere with the brake pedal, does not influence the generation of maximum braking force, adopts the spiral single-circle steel cable to wind the driving wheel, can effectively prevent the wire control failure caused by the dead winding and clamping of the steel cable, and can realize the rapid, quick and accurate operation of the brake pedal.)

1. The active brake pedal operating device comprises a bottom plate (1), wherein the bottom plate (1) is a floor of an automobile cab, and is characterized in that a brake pedal assembly (100), a motor assembly (300), a pulley assembly (200) and a steel cable (2) are arranged on the bottom plate (1);

the brake pedal assembly (100) comprises a brake pedal (101), a pedal rotating shaft (101a) at the top of the brake pedal (101) is hinged with a pedal support in an automobile, a pedal pivot (101b) connected with a push rod of an automobile vacuum booster is arranged below the pedal rotating shaft (101a), a pedal connecting hole (101c) of a through hole structure is formed below the pedal pivot (101b), a pedal connector (102) with a U-shaped longitudinal section is hinged with the brake pedal (101) through connector connecting holes (102a) on two vertical parts of the pedal connector (102), a pin shaft and the pedal connecting hole (101c), and a pedal connector steel cable hole (102b) is formed in the center of the horizontal part of the pedal connector (102);

the motor assembly (300) comprises a stepping motor (301) and a driving wheel (303), the stepping motor (301) is fixed on the bottom plate (1) through a motor support (302), an output shaft of the stepping motor (301) penetrates through the motor support (302) and then is fixedly connected with the center of the driving wheel (303), a driving wheel steel cable groove (303a) which is circumferentially arranged and used for accommodating the steel cable (2) is formed in the driving wheel (303), the center line of the driving wheel steel cable groove (303a) is spiral, and the radius of the driving wheel steel cable groove (303a) is continuously increased from the starting point to the end point of the driving wheel steel cable groove (303a) so as to prevent the steel cable (2) from being wound;

the pulley assembly (200) comprises a pulley (201), a pulley bracket (203) and a pulley base (204) with an L-shaped longitudinal section, the horizontal part of the pulley base (204) is fixed on the bottom plate (1), the pulley (201) is connected with the pulley bracket (203) through a pulley shaft (202) to enable the pulley (201) to rotate in the pulley bracket (203), the pulley bracket (203) is connected with the center of the vertical part of the pulley base (204) through a pulley bracket pivot (203a) to enable the pulley bracket (203) to rotate on the pulley base (204), and a pulley groove (201a) which is circumferentially arranged and used for accommodating the steel cable (2) is formed in the pulley (201);

the front end of the steel cable (2) is fixed in the driving wheel steel cable groove (303a), the steel cable (2) is wound in the driving wheel steel cable groove (303a) and then passes through the pulley groove (201a) of the pulley (201), and finally the rear end of the steel cable (2) passes through the pedal connector steel cable hole (102b) and then cannot be separated from the pedal connector steel cable hole (102b) in a knotting or pressing and buckling mode.

2. The active operating device of the brake pedal according to claim 1, characterized in that the longitudinal section of the pulley bracket (203) is U-shaped, the two vertical parts of the pulley bracket (203) are provided with pulley bracket holes (203c) with through hole structures, the center of the horizontal part of the pulley bracket (203) is fixedly provided with a pulley bracket pivot (203a) with a cylindrical structure, the outer cylindrical surface of the pulley bracket pivot (203a) is provided with a circular pulley bracket pivot clamp spring groove (203b), the outer cylindrical surfaces of the two ends of the pulley shaft (202) are provided with circular pulley shaft clamp spring grooves (202a), the pulley (201) is positioned between the two vertical parts of the pulley bracket (203), after the pulley shaft (202) passes through the pulley bracket holes (203c) and the shaft holes of the pulley (201), the two ends of the pulley shaft (202) are respectively provided with a clamp spring which is clamped into the corresponding pulley shaft clamp spring grooves (202a), a pulley base hole (204b) with a through hole structure is formed in the center of the vertical portion of the pulley support (203), and after the pulley support pivot (203a) penetrates through the pulley base hole (204b), a clamp spring is clamped into a clamp spring groove (203b) of the pulley support pivot.

3. An active operating device of a brake pedal according to claim 1 or 2, wherein a plane is formed between a start point and an end point of the cable groove (303a) of the driving wheel in a radial direction of the driving wheel (303), the plane is provided with a cable fixing hole (303b), a jack hole (303c) communicating with the cable fixing hole (303b) and arranged in the radial direction of the driving wheel (303) is formed in the cable groove (303a) at a position above the cable fixing hole (303b), the jack hole (303c) is internally threaded, a front end of the cable (2) is inserted into the cable fixing hole (303b), and a jack screw is screwed into the jack hole (303c) and tightened to fix the cable (2).

4. Active brake pedal actuation device according to claim 1 or 2, characterized in that the pulley groove (201a) is chamfered with an arc (201b) at its edge to facilitate the sliding of the cable (2) into the pulley groove (201 a).

5. The active operating device of the brake pedal according to claim 1 or 2, wherein the horizontal portion of the motor bracket (302) is provided with two symmetrically arranged through holes, namely motor bracket fixing holes (302a), and the motor bracket (302) is fixed on the base (1) by two bolts and the motor bracket fixing holes (302a) after the position of the motor bracket (302) is adjusted.

Technical Field

The invention belongs to the technical field of intelligent automobile brake systems, and relates to an active control device of a brake system, in particular to an active control device of a brake pedal.

Background

The automobile brake system mainly comprises a brake and a brake driving mechanism. The brake pedal is an input of the brake driving mechanism, and the driver controls the braking force by stepping on the brake pedal to decelerate and stop the automobile. The acting force of a driver pushes a push rod of a vacuum booster through a brake pedal, the vacuum booster amplifies the acting force of the driver and pressurizes a brake master cylinder, and the pressure in the brake master cylinder is transmitted to brakes on four wheels through brake fluid. The caliper in the brake is pressed to the brake disc under the action of pressure, so that braking force is generated. The greater the angle at which the driver depresses the brake pedal, the greater the braking force generated by the brake.

With the development of automobile intellectualization and networking, the driving process not only has a driver, but also adds the participation of a machine system. Nowadays, an electronic accelerator pedal is generally adopted by an automobile, and an electronic throttle control signal in a vehicle-mounted electronic control unit is directly modified, so that the effect of automatic driving or man-machine driving can be achieved. The braking system is different from an accelerator pedal as a purely mechanically connected system, and a machine system cannot directly control the braking force for a long time in an electronic control mode. Some newly developed electric intelligent automobiles adopt a brake-by-wire system to realize control of braking force. The sensor on the brake pedal senses the braking action of a driver, the action is converted into an electric signal and input into the control unit, the control unit calculates the required thrust according to the signal and the vehicle state, and the motor is controlled to generate corresponding torque to push the brake master cylinder, so that the braking force is generated. When automatic driving is carried out, the control unit can directly generate a signal to control the motor to operate so as to realize automatic control of braking force. However, if it is desired to implement automatic driving control for an existing conventional automobile, it is necessary to modify it. If the brake-by-wire system is adopted, the refitting range is large, the difficulty is high, the cost is high, and the practical feasibility is not realized.

Disclosure of Invention

In order to overcome the problems in the prior art, the invention provides an active brake pedal operating device

The invention is realized by adopting the following technical scheme:

the active brake pedal operating device comprises a bottom plate, wherein the bottom plate is a floor of an automobile cab, and is characterized in that a brake pedal assembly, a motor assembly, a pulley assembly and a steel cable are arranged on the bottom plate;

the brake pedal assembly comprises a brake pedal, a pedal rotating shaft at the top of the brake pedal is hinged with a pedal support in an automobile, a pedal pivot connected with a push rod of an automobile vacuum booster is arranged below the pedal rotating shaft, a pedal connecting hole of a through hole structure is formed below the pedal pivot, a pedal connector with a U-shaped longitudinal section is hinged with the brake pedal through connector connecting holes, pin shafts and the pedal connecting holes on two vertical parts of the pedal connector, and a pedal connector steel cable hole is formed in the center of a horizontal part of the pedal connector;

the motor assembly comprises a stepping motor and a driving wheel, the stepping motor is fixed on the bottom plate through a motor support, an output shaft of the stepping motor penetrates through the motor support and then is fixedly connected with the center of the driving wheel, a driving wheel steel cable groove which is circumferentially arranged and used for accommodating a steel cable is formed in the driving wheel, the center line of the driving wheel steel cable groove is spiral, and the radius of the driving wheel steel cable groove is continuously increased from the starting point to the end point of the driving wheel steel cable groove so as to prevent the steel cable from being wound;

the pulley assembly comprises a pulley, a pulley bracket and a pulley base with an L-shaped longitudinal section, the horizontal part of the pulley base is fixed on the bottom plate, the pulley is connected with the pulley bracket through a pulley shaft to enable the pulley to rotate in the pulley bracket, the pulley bracket is connected with the center of the vertical part of the pulley base through a pulley bracket pivot to enable the pulley bracket to rotate on the pulley base, and a pulley groove which is circumferentially arranged and used for accommodating a steel cable is arranged on the pulley;

the front end of the steel cable is fixed in the steel cable groove of the driving wheel, the steel cable is wound in the steel cable groove of the driving wheel and then passes through the pulley groove of the pulley, and finally, the rear end of the steel cable passes through the steel cable hole of the pedal connector and then is knotted or buckled in a pressing mode, so that the steel cable cannot be separated from the steel cable hole of the pedal connector.

The further technical scheme comprises the following steps:

the longitudinal section of the pulley support is U-shaped, pulley support holes with through hole structures are formed in two vertical portions of the pulley support, a pulley support pivot with a cylindrical structure is fixedly arranged at the center of a horizontal portion of the pulley support, annular pulley support pivot clamp spring grooves are formed in the outer cylindrical surface of the pulley support pivot, annular pulley shaft clamp spring grooves are formed in the outer cylindrical surfaces of two ends of a pulley shaft, the pulley is located between the two vertical portions of the pulley support, after the pulley shaft penetrates through the pulley support holes and the shaft holes of the pulley, clamp springs are arranged at two ends of the pulley shaft and clamped into the corresponding pulley shaft clamp spring grooves, a pulley base hole with a through hole structure is formed in the center of the vertical portion of the pulley support), and after the pulley support pivot penetrates through the pulley base hole, one clamp spring is clamped into the pulley support pivot clamp spring groove.

A plane along the radial direction of the driving wheel is formed between the starting point and the end point of the steel cable groove of the driving wheel, a steel cable fixing hole is formed in the plane, a top wire hole which is communicated with the steel cable fixing hole and is arranged along the radial direction of the driving wheel is formed in the position above the steel cable groove of the driving wheel, an internal thread is arranged in the top wire hole, the front end of the steel cable is inserted into the steel cable fixing hole, and a top wire is screwed into the top wire hole and screwed to fix the steel cable.

The edge processing of pulley groove has the arc chamfer, is convenient for the steel cable to slide in the pulley groove.

The horizontal part of the motor support is provided with two strip-shaped through holes which are symmetrically arranged, namely motor support fixing holes, and the motor support is fixed on the base through two bolts and the motor support fixing holes after the position of the motor support is adjusted.

Compared with the prior art, the invention has the beneficial effects that:

the active control device of the brake pedal provided by the invention has the advantages of small change to the original vehicle, convenience in installation and low cost, and does not influence the braking function of the original vehicle. After the brake pedal is installed, the drive-by-wire of the brake pedal can be realized, and meanwhile, a driver can still operate the brake pedal.

The active control device of the brake pedal provided by the invention has a small and compact structure, does not interfere with the brake pedal, and does not influence the generation of the maximum braking force. All components are concentrated near the brake pedal. Does not occupy the space in other places of the vehicle.

The active control device of the brake pedal provided by the invention adopts the spiral single-circle steel cable to wind the driving wheel, has high reliability, and can effectively prevent the wire control failure caused by the winding and clamping of the steel cable.

The active operating device of the brake pedal provided by the invention adopts the large-torque stepping motor as a power source, and simultaneously, because the motor is close to the brake pedal, the total length of the required steel cable is short, and the linearity of the generated tension is high. The brake pedal can be quickly, quickly and accurately operated.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of a brake pedal assembly according to the present invention.

Fig. 3 is a schematic view of the construction of the sheave assembly of the present invention.

Fig. 4 is a schematic structural view of the motor assembly of the present invention.

Fig. 5 is a schematic view of the driving wheel according to the present invention.

Fig. 6 is a sectional view of the driving wheel in the present invention.

In the figure: 1. the brake pedal assembly comprises a base plate, 2, a steel cable, 100, a brake pedal assembly, 101, a brake pedal, 101a, a pedal rotating shaft, 101b, a pedal pivot, 101c, a pedal connecting hole, 102, a pedal connector, 102a, a connector connecting hole, 102b, a connector steel cable hole, 200, a pulley assembly, 201, a pulley, 201a pulley groove, 201b, a pulley groove chamfer, 202, a pulley shaft, 202a, a pulley shaft snap spring groove, 203, a pulley bracket, 203a pulley bracket pivot, 203b, a pulley bracket pivot snap spring groove, 203c, a pulley bracket hole, 204, a pulley base, 204a pulley base fixing hole, 204b, a pulley base hole, 205, a snap spring, 300, a motor assembly, 301a motor output shaft, 302, a motor bracket, 302a motor bracket fixing hole, 302b, a motor fixing hole, 303, a driving wheel, 303a driving wheel steel cable groove, 303b, a steel cable fixing hole, 303c, and a jackscrew hole.

Detailed Description

The invention provides an active brake pedal operating device, which comprises a bottom plate 1, wherein a brake pedal assembly 100, a motor assembly 300 and a pulley assembly 200 are arranged on the bottom plate 1, and the bottom plate 1 is a floor of an automobile cab;

as shown in fig. 2, the brake pedal assembly 100 includes a brake pedal 101, a pedal rotating shaft 101a at the top of the brake pedal 101 is hinged to a pedal bracket in the vehicle, a pedal pivot 101b connected to a push rod of a vacuum booster of the vehicle is provided below the pedal rotating shaft 101a, when the pedal is stepped on, the brake pedal 101 can rotate around the pedal rotating shaft 101a, and the pedal pivot 101b pushes the push rod of the vacuum booster of the vehicle, a pedal connecting hole 101c with a through hole structure is provided below the pedal pivot 101b, a pedal connector 102 with a U-shaped longitudinal section is hinged to the brake pedal 101 through a connector connecting hole 102a, a pin shaft and the pedal connecting hole 101c on two vertical portions of the pedal connector 102, and a pedal connector cable hole 102b is provided at the center of a horizontal portion of the pedal connector 102;

as shown in fig. 4, the motor assembly 300 includes a stepping motor 301 and a driving wheel 303, the stepping motor 301 is fixed on the base plate 1 through a motor bracket 302, an output shaft of the stepping motor 301 passes through the motor bracket 302 and is fixedly connected with the center of the driving wheel 303, the driving wheel 303 is provided with a driving wheel cable groove 303a which is circumferentially arranged and used for accommodating the steel cable 2, the center line of the driving wheel cable groove 303a is spiral, and the radius of the driving wheel cable groove 303a is continuously increased from the starting point to the end point of the driving wheel cable groove 303a to prevent the steel cable from being wound; the horizontal part of motor support 302 is opened has the through-hole of the bar of two symmetries settings promptly motor support fixed orifices 302a, adjusts the position of motor support 302 back and fixes motor support 302 on base 1 through two bolts and motor support fixed orifices 302a, respectively is provided with a motor fixed orifices 302b on four angles of the vertical portion of motor support 302, is used for fixed step motor 301 with the bolt cooperation.

The pulley assembly 200 is used for changing the movement direction of the wire rope 2 and transmitting the pulling force from the motor assembly 300 to the brake pedal assembly 100, as shown in fig. 3, the pulley assembly 200 includes a pulley 201, a pulley bracket 203 and a pulley base 204 with an L-shaped longitudinal section, the horizontal part of the pulley base 204 is fixed on the base plate 1, the longitudinal section of the pulley bracket 203 is U-shaped, pulley bracket holes 203c with a through hole structure are formed on two vertical parts of the pulley bracket 203, a pulley bracket pivot 203a with a cylindrical structure is fixedly arranged at the center of the horizontal part of the pulley bracket 203, a circular pulley bracket pivot clamp spring groove 203b is formed on the outer cylindrical surface of the pulley bracket pivot 203a, circular pulley shaft clamp spring grooves 202a are formed on the outer cylindrical surface of two ends of the pulley shaft 202, the pulley 201 is located between the two vertical parts of the pulley bracket 203, the pulley shaft 202 passes through the pulley bracket holes 203c and the shaft hole of the pulley 201, two ends of the pulley shaft 202 are respectively provided with a clamp spring which is clamped into the corresponding pulley shaft clamp spring groove 202a, the center of the vertical part of the pulley support 203 is provided with a pulley base hole 204b with a through hole structure, after the pulley support pivot 203a passes through the pulley base hole 204b, one clamp spring is clamped into the pulley support pivot clamp spring groove 203b, the pulley 201 is provided with a pulley groove 201a which is circumferentially arranged and used for accommodating the steel cable 2, and the edge of the pulley groove 201a is provided with an arc-shaped chamfer 201b, so that the steel cable 2 can conveniently slide into the pulley groove 201a.

A plane is formed between the starting point and the ending point of the cable groove 303a of the driving wheel 303 along the radial direction of the driving wheel 303, the plane is provided with a cable fixing hole 303b, a top thread hole 303c communicated with the cable fixing hole 303b and arranged along the radial direction of the driving wheel 303 is formed in the part, above the cable fixing hole 303b, in the cable groove 303a, the top thread hole 303c is provided with internal threads, the front end of the cable 2 is inserted into the cable fixing hole 303b, a top thread is screwed into the top thread hole 303c and tightened to fix the cable 2, the cable 2 is wound in the cable groove 303a of the driving wheel and then passes through the pulley groove 201a of the pulley 201, and finally, the rear end of the cable 2 passes through the cable hole 102b of the pedal connector to enable the cable 2 not to be separated from the cable hole 102b of the pedal connector in a knotting or pressing mode.

In this embodiment, the diameter of the driving wheel 303 is 50mm, and a steel cable longer than 120mm can be wound in a single circle, that is, a specified pedal can move downwards by 120mm, so that the brake pedal stroke of a common passenger vehicle is satisfied. Because the driving wheel steel cable groove 303a is the spiral type, the single loop winding steel cable can not take place the steel cable winding at the receipts and releases in-process of steel cable, can effectively prevent the device inefficacy.

The stepping motor 301 is connected to an external control system via a stepping motor driver.

The stepping motor 301 receives a command from the control system, rotates a specified angle at a specified rotation speed, drives the driving wheel 303 to rotate, the driving wheel 303 makes the steel cable 2 fixed on the driving wheel begin to wind along the steel cable groove 303a, and through the guiding function of the pulley assembly 200, the steel cable 2 fixed on the pedal assembly 100 at the other end begins to pull the brake pedal 101 towards the direction of the pulley assembly 200, thereby generating a braking force. When the braking force needs to be released, the motor 301 rotates reversely, the wire rope 2 is pulled back by the return force of the brake pedal, and the wire rope 2 is unwound from the driving wheel 303.