Dragging type brake execution device

Abstract

The utility model discloses a dragging type brake execution device which comprises an electric driving assembly, a dragging traction assembly, a guide mechanism and a pressing buckle assembly, and the dragging traction assembly is connected to the brake power output end of the electric driving assembly and flexibly drags and transmits output brake force; the guide mechanism is used for deflecting and reversing a flexible brake cable on the dragging traction assembly, the pressing buckle assembly is installed at the tail end of the flexible brake cable on the dragging traction assembly, and the tail end of the flexible brake cable is connected and fixed to a brake pedal of a vehicle; the electric driving assembly outputs traction braking force through the dragging traction assembly, and a flexible brake cable on the dragging traction assembly is deflected and turned downwards through the guide mechanism, connected with a brake pedal through a pressing buckle assembly at the tail end and synchronously drags the brake pedal to automatically brake. In the working process, when the vehicle sensor detects that an obstacle exists in front, an instruction is sent to control the dragging type brake to pull down the brake pedal for braking, and the effect of automatic urgent danger avoiding is achieved.

Description

Technical Field

[0001] The utility model relates to a vehicle brake control technology, in particular to a drag-type brake execution device. Background Art

[0002] At present, the existing vehicle assisted driving system is usually connected to the vehicle's hydraulic brake system. When the control unit determines that there is a risk of collision, it applies the brakes through the hydraulic actuator. The hydraulic brake system generally consists of a brake pedal, a vacuum booster pump, a master brake cylinder, brake fluid, a brake oil pipe, an ABS pump assembly, a brake slave cylinder and wheel brakes. Figure 1 As shown, the brake pedal transmits the driver's pedal force to the vacuum booster pump 1'. The vacuum booster pump 1' is a device that uses vacuum negative pressure to assist the brake pedal. The opening and closing of the air valve and the vacuum valve are used to control the pressure difference between the front chamber 2' and the rear chamber 3', thereby controlling the magnitude of the assist. The master brake pump converts the push rod force output by the push rod 4' on the vacuum booster pump into hydraulic pressure, which facilitates subsequent hydraulic pressure transmission and finally transmits the pressure to the wheel brake to perform the braking operation.

[0003] Existing vehicle hydraulic braking systems have the following disadvantages: (1) In emergency situations, the hydraulic system may have a delayed response; (2) The components and pipes of the hydraulic system are easily clogged and worn by pollutants, which affects the normal operation of the system; (3) The viscosity of the hydraulic oil changes with temperature, which can affect the performance and accuracy of the system in extreme temperatures; (4) If the hydraulic oil leaks, the braking effect will be seriously affected and environmental pollution will also occur.

[0004] Moreover, most traditional assisted driving systems are motor plunger pump active pressure-building braking systems based on the automotive electronic stability control system, or master cylinder power-assisted motor active pressure-building braking systems based on the new automotive electronic power-assisted braking system. These braking systems are invasive braking systems. When used, they require changes to the original braking system structure of the vehicle, resulting in high costs, complex installation, and prone to errors. Summary of the Invention

[0005] The utility model aims to solve the problems of low control precision, susceptibility to environmental influences and complex installation in existing brake systems and provides a drag brake actuator which is easy to install, quick to respond and highly reliable.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A drag brake actuator for controlling vehicle braking, comprising:

[0008] An electric drive assembly connected to a power source and providing a dragging braking action under the control of a brake command;

[0009] A dragging and traction assembly is connected to the braking power output end of the electric drive assembly and flexibly traction-transmits the braking force output by the electric drive assembly;

[0010] A guide mechanism for deflecting and redirecting the flexible brake line on the towing assembly;

[0011] A buckle assembly is installed on the end of the flexible brake line on the towing assembly and connects and fixes the end of the flexible brake line to the brake pedal of the vehicle;

[0012] The electric drive assembly outputs traction braking force by dragging the traction assembly. The flexible brake line on the dragging traction assembly is turned downward by the deflection of the guide mechanism, connected to the brake pedal through the buckle assembly at the end, and synchronously pulls the brake pedal to brake automatically.

[0013] Preferably, the electric drive assembly includes a drive motor, an inner cover, a traction wire wheel whose braking speed is controlled by the rotation speed, and an outer end cover, and the traction wire wheel is fixedly mounted on the rotating output shaft of the drive motor through a motor turntable and an end fixing column; the circumferential outer edge of the traction wire wheel is recessed to provide a wire groove for pulling and winding the flexible brake line on the dragging and traction assembly; the outer side wall of the traction wire wheel is also fixed with a positioning column through a stud, which cooperates with the circumferential limit groove on the inner side of the outer end cover and is used to limit the braking stroke of the traction wire wheel; the inner cover and the outer end cover are buckled and docked with each other, and after being fixedly connected by screws, the traction wire wheel and the flexible brake line are sealed together.

[0014] Preferably, the drive motor is also integrally mounted with a reduction gear box for supplying driving force to the rotating output shaft after deceleration.

[0015] Preferably, the dragging and traction assembly includes a soft sleeve and a flexible brake line, the flexible brake line is sleeved in the soft sleeve, the soft sleeve is installed and connected between the electric drive assembly and the guide mechanism, and the two ends of the soft sleeve are respectively locked and fixed to the electric drive assembly and the guide mechanism by nuts and threaded heads, the end of the flexible brake line is fixedly connected to the traction wire pulley of the electric drive assembly through a stainless steel spring, and the flexible brake line rolls and contacts the guide roller of the guide mechanism.

[0016] Preferably, the flexible brake line is a plastic-steel fiber traction line.

[0017] Preferably, the guide mechanism includes a guide wheel bracket seat, a guide roller and a wire limit buckle. The wire inlet side of the guide wheel bracket seat is provided with a sleeve locking hole fixedly connected to the end of the soft sleeve on the dragging and traction assembly. The guide roller is installed on the U-shaped bracket in the middle of the guide wheel bracket seat through a bearing and a rotating shaft. The wire limit buckle is installed on the wire outlet side of the guide wheel bracket seat and is used to limit the flexible brake line deflected and guided on the guide roller from escaping from the slide groove on the guide roller.

[0018] Preferably, the buckle assembly includes a buckle sleeve, an insert and two locking screws. The buckle sleeve is provided with a locking hole for the insert set through the front and back. The bottom side of the insert and the docking surface of the locking hole are relatively provided with an embedding groove for synchronously locking the flexible brake line passing through the towing and traction assembly and the folded section of the flexible brake line set brake pedal. The two locking screws are threadedly connected to the top side of the buckle sleeve, and the lower ends abut against the upper side of the insert to lock the flexible brake line buckle in the embedding groove.

[0019] The beneficial effects of the utility model are:

[0020] The existing invasive braking execution method has the problems of low control accuracy, susceptibility to environmental influences and complex installation. When the original braking system structure of the car needs to be changed, there are problems of high cost, complex installation and easy errors. The utility model adopts non-invasive braking control. Without changing the original braking system structure of the car, a dragging brake execution device is set at the brake pedal. When the vehicle sensor detects an obstacle in front, the electric drive component outputs traction braking force through the dragging traction component. The flexible brake line on the dragging traction component is turned downward by the deflection of the guide mechanism, connected to the brake pedal through the buckle component at the end, and synchronously pulls the brake pedal to brake automatically. By sending a command, the brake pedal can be pulled down to achieve the effect of automatic emergency avoidance. It not only effectively reduces the installation cost and reduces the impact on the original braking system of the car, but also effectively improves the vehicle's braking response and braking reliability.

[0021] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a hydraulic brake system in the prior art;

[0023] Figure 2 This is a schematic structural diagram of the use of the utility model;

[0024] Figure 3 This is a schematic diagram of the installation structure of the utility model;

[0025] Figure 4It is an enlarged schematic diagram of the exploded structure of the electric drive assembly in the utility model;

[0026] Figure 5 It is an enlarged schematic diagram of the three-dimensional structure of the electric drive assembly in the utility model;

[0027] Figure 6 It is an enlarged schematic diagram of the three-dimensional structure of the guide mechanism in the utility model;

[0028] Figure 7 It is an enlarged schematic diagram of the three-dimensional structure of the press buckle assembly in the utility model;

[0029] Figure 8 It is an enlarged schematic diagram of the three-dimensional structure of the dragging and traction component in the utility model. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] A drag brake actuator, such as Figure 2 and Figure 3 As shown, the braking control for the vehicle brake pedal 1 includes an electric drive component 2, a dragging and traction component 3, a guide mechanism 4 and a buckle component 5. The electric drive component 2 is connected to the power supply and provides a dragging braking action under the control of the braking command; the dragging and traction component 3 is connected to the braking power output end of the electric drive component 2, and flexibly traction transmits the braking force output by the electric drive component 2. The guide mechanism 4 is used to deflect and redirect the flexible brake line 31 on the dragging and traction component 3; the buckle component 5 is installed at the end of the flexible brake line 31 on the dragging and traction component 3, and the end of the flexible brake line 31 is connected and fixed to the brake pedal 1 of the vehicle. The electric drive component 2 outputs the traction braking force through the dragging and traction component 3. The flexible brake line 31 on the dragging and traction component 3 is deflected downward by the guide mechanism 4, connected to the brake pedal through the buckle component 5 at the end, and synchronously drags the brake pedal to brake automatically.

[0033] like Figures 3 to 5 As shown, the electric drive assembly 2 includes a drive motor 20, an inner cover 21, a traction wire wheel 22 whose braking speed is controlled by the rotation speed, and an outer end cover 23. The drive motor 20 is integrally installed with a reduction gear box 24 that supplies driving force to the rotating output shaft after deceleration. The traction wire wheel 22 is fixedly mounted on the rotating output shaft of the drive motor 20 through a motor turntable 25 and an end fixing column 26; the circumferential outer edge of the traction wire wheel 22 is recessed with a wire groove for pulling and winding the flexible brake line 31 on the dragging and traction assembly 3; the outer wall of the traction wire wheel 22 is also fixed with a positioning column 28 through a stud 27, which cooperates with the circumferential limit groove (not shown in the figure) on the inner side of the outer end cover 23 and is used to limit the braking stroke of the traction wire wheel 22; the inner cover 21 and the outer end cover 23 are buckled and docked with each other, and after being fixedly connected by screws, the traction wire wheel 22 and the flexible brake line 31 are sealed together.

[0034] like Figure 3 and Figure 8 As shown, the dragging and traction component 3 includes a soft sleeve 30 and a flexible brake line 31, wherein the flexible brake line 31 is a plastic-steel fiber traction line; the flexible brake line 31 is sleeved in the soft sleeve 30, and the soft sleeve 30 is installed and connected between the electric drive component 2 and the guide mechanism 4, and the two ends of the soft sleeve 30 are respectively locked and fixed to the electric drive component 2 and the guide mechanism 4 by nuts and threaded heads. The end of the flexible brake line 31 is fixedly connected to the traction wire wheel 22 of the electric drive component 2 through a stainless steel spring, and the flexible brake line 31 rolls and contacts on the guide roller 41 of the guide mechanism 4.

[0035] like Figure 3 and Figure 6 As shown, the guide mechanism 4 includes a guide wheel bracket seat 40, a guide roller 41 and a wire limit buckle 42. The guide wheel bracket seat 40 has a sleeve locking hole 400 on the incoming line side that is fixedly connected to the end of the soft sleeve 30 on the dragging and traction assembly 3. The guide roller 41 is installed on the U-shaped bracket 401 in the middle of the guide wheel bracket seat 40 through a bearing and a rotating shaft. The wire limit buckle 42 is installed on the outgoing line side of the guide wheel bracket seat 40 and is used to limit the flexible brake line 31 deflected and guided on the guide roller 41 from escaping the slide groove on the guide roller 41.

[0036] like Figure 3 and Figure 7As shown, the buckle assembly 5 includes a buckle sleeve 50, an insert 51 and two locking screws 52. The buckle sleeve 50 is provided with a locking hole for the insert 51 to be installed. The bottom side of the insert 51 and the docking surface of the locking hole are relatively provided with an embedding groove 53 for synchronously locking the flexible brake line 31 passing through the towing assembly 3 and the folded section of the flexible brake line 31 installed on the brake pedal. The two locking screws 52 are threadedly connected to the top side of the buckle sleeve 50, and the lower ends abut against the upper side of the insert 51 to buckle and lock the flexible brake line 31 in the embedding groove 53.

[0037] In this embodiment, non-invasive braking control is adopted, and the brake pedal is fixedly connected to the flexible brake line 31 through the buckle component 5. When the vehicle sensor detects an obstacle, the electric drive component 2 outputs a traction braking force by dragging the traction component 3, and the flexible brake line 31 automatically brakes by pulling the brake pedal downward under the deflection of the guide mechanism 4, thereby achieving the effect of automatic emergency avoidance by sending a braking command and pulling down the brake pedal.

[0038] In the description of the present invention, it should be noted that the terms "front", "rear", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0039] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Any equivalent changes based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drag brake actuator for controlling vehicle braking, characterized in that: include: An electric drive assembly connected to a power source and providing a dragging braking action under the control of a brake command; A dragging and traction assembly is connected to the braking power output end of the electric drive assembly and flexibly traction-transmits the braking force output by the electric drive assembly; A guide mechanism for deflecting and redirecting the flexible brake line on the towing assembly; A buckle assembly is installed on the end of the flexible brake line on the towing assembly and connects and fixes the end of the flexible brake line to the brake pedal of the vehicle; The electric drive assembly outputs traction braking force by dragging the traction assembly. The flexible brake line on the dragging traction assembly is turned downward by the deflection of the guide mechanism, connected to the brake pedal through the buckle assembly at the end, and synchronously pulls the brake pedal to brake automatically.

2. The drag brake actuator according to claim 1, characterized in that: The electric drive assembly includes a drive motor, an inner cover, a traction wire wheel whose braking speed is controlled by the rotation speed, and an outer end cover. The traction wire wheel is fixedly mounted on the rotating output shaft of the drive motor through a motor turntable and an end fixing column; the circumferential outer edge of the traction wire wheel is recessed to provide a wire groove for pulling and winding the flexible brake line on the dragging and traction assembly; the outer side wall of the traction wire wheel is also fixed with a positioning column through a stud, which cooperates with the circumferential limit groove on the inner side of the outer end cover and is used to limit the braking stroke of the traction wire wheel; the inner cover and the outer end cover are buckled and docked with each other, and after being fixedly connected by screws, the traction wire wheel and the flexible brake line are sealed together.

3. The drag brake actuator according to claim 2, characterized in that: The drive motor is also integrally mounted with a reduction gear box for supplying driving force to the rotating output shaft after deceleration.

4. The drag brake actuator according to claim 1, characterized in that: The dragging and traction assembly includes a soft sleeve and a flexible brake line. The flexible brake line is sleeved in the soft sleeve. The soft sleeve is installed and connected between the electric drive assembly and the guide mechanism, and the two ends of the soft sleeve are respectively locked and fixed to the electric drive assembly and the guide mechanism by nuts and threaded heads. The end of the flexible brake line is fixedly connected to the traction wire pulley of the electric drive assembly through a stainless steel spring, and the flexible brake line rolls and contacts the guide roller of the guide mechanism.

5. The drag brake actuator according to claim 1, characterized in that: The flexible brake line is a plastic-steel fiber traction line.

6. The drag brake actuator according to claim 1 or 4, characterized in that: The guide mechanism includes a guide wheel bracket seat, a guide roller and a wire limit buckle. The wire inlet side of the guide wheel bracket seat is provided with a sleeve locking hole fixedly connected to the end of the soft sleeve on the dragging and traction assembly. The guide roller is installed on the U-shaped bracket in the middle of the guide wheel bracket seat through a bearing and a rotating shaft. The wire limit buckle is installed on the wire outlet side of the guide wheel bracket seat and is used to limit the flexible brake line deflected and guided on the guide roller from escaping from the slide groove on the guide roller.

7. The drag brake actuator according to claim 1, characterized in that: The buckle assembly includes a buckle sleeve, an insert and two locking screws. The buckle sleeve is provided with a locking hole for the insert set in a front-to-back manner. The bottom side of the insert and the docking surface of the locking hole are relatively provided with an embedding groove for synchronously locking the flexible brake line passing through the towing and traction assembly and the folded section of the flexible brake line set brake pedal. The two locking screws are threadedly connected to the top side of the buckle sleeve, and the lower ends abut against the upper side of the insert to lock the flexible brake line buckle in the embedding groove.

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