Redundant structure for connection of brake pedal and power-assisted mechanism
By introducing redundant structures in the brake pedal and booster mechanism, including welded pins, bushings, and limit designs, the problem of easy disconnection between the booster and the brake pedal is solved, ensuring that force can still be effectively transmitted under wear conditions, thus improving the reliability and safety of the braking system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-04-03
Smart Images
Figure CN224075538U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive manufacturing technology, and more specifically, to a redundant structure for connecting a brake pedal and a power assist mechanism. Background Technology
[0002] The connection between the brake pedal and the booster pushrod in a car's braking system directly affects driving comfort and vehicle safety.
[0003] Currently, most vehicles on the market use a shift fork and pin connection for the power booster and brake pedal, which is a single power booster mechanism design. During driving, the frequent relative movement between the various mechanisms causes wear and fatigue, which may lead to the pin falling off. This can cause the power booster to detach from the brake pedal, making it impossible to effectively transmit force, resulting in brake failure and threatening driving safety.
[0004] Therefore, there is an urgent need for a redundant structure connecting the brake pedal and the power assist mechanism with dual insurance. Utility Model Content
[0005] This application aims to address at least one of the technical problems existing in the prior art or related technologies.
[0006] Therefore, this application provides a redundant structure for connecting the brake pedal and the power assist mechanism, so that even if a single component fails, the other components can still maintain the braking effect, reducing the risk of brake failure.
[0007] This application provides a redundant structure for connecting a brake pedal and a booster mechanism, including a pedal arm, a welding pin, a bushing, and a booster push rod. The welding pin is mounted on the pedal arm; the bushing is clearance-fitted with the welding pin, and the welding pin has a groove on it, allowing the bushing to rotate outside the groove, which prevents the bushing from disengaging from the welding pin; the booster push rod is rotatably connected to the bushing.
[0008] In some embodiments, a bushing is disposed between the welded pin and the booster push rod, and the bushing serves for lubrication and noise reduction.
[0009] In some embodiments, the welding pin and bushing are an integral movable structure.
[0010] In some embodiments, the bushing is a nylon bushing.
[0011] In some embodiments, the booster push rod has a closed annular profile, and the two opposite surfaces of the booster push rod are planes.
[0012] In some embodiments, the redundant structure further includes: a cotter pin, a through-welded pin, for limiting the push rod of the booster; and a clip, disposed on the cotter pin, for limiting the cotter pin.
[0013] In some embodiments, the cotter pin is irregularly shaped to match the clip.
[0014] In some embodiments, the clip has a receiving cavity for receiving a cotter pin.
[0015] In some embodiments, the welding pin has a through hole for accommodating the cotter pin.
[0016] In some embodiments, the booster push rod includes a first contact end and a second contact end opposite to each other, the first contact end being close to the bushing and the second contact end being close to the clip.
[0017] Compared with the prior art, the technical solution provided in this application includes at least the following technical effects:
[0018] This application provides a redundant structure connecting the brake pedal and the booster mechanism. Even if a single component fails, the other components can still maintain the braking effect, reducing the risk of brake failure. A welded pin is fixed to the pedal arm. When the driver depresses the brake pedal, the pedal arm amplifies the force applied by the foot through leverage. This force is transmitted to the booster push rod via the welded pin, pushing the push rod to move axially and transferring the pedal force to the vacuum booster. A bushing is provided on the welded pin. The bushing can be press-fitted onto the welded pin according to actual needs, or it can be fitted with a slot to engage with the necked structure outside the welded pin, preventing the bushing from detaching. A cotter pin and a clip are located at the end of the welded pin, limiting the booster push rod. Even if the cotter pin and clip detach due to wear and fatigue, the pedal arm will not detach from the booster push rod, avoiding brake failure caused by component detachment and further enhancing the reliability of the structure.
[0019] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description
[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood in conjunction with the following description of the embodiments, in which:
[0021] Figure 1 This is a schematic diagram of the redundant structure connecting the brake pedal and the power assist mechanism in some embodiments of this application;
[0022] Figure 2 Exploded view of the redundant structure connecting the brake pedal and the power assist mechanism in some embodiments of this application;
[0023] Figure 3 This is a schematic diagram of the welding pins and bushings in some embodiments of this application.
[0024] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:
[0025] 100. Pedal arm; 110. Welding pin; 120. Bushing; 200. Booster push rod; 300. Cotter pin; 400. Clamping plate. Detailed Implementation
[0026] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0027] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0028] The following reference Figures 1 to 3 This application describes a redundant structure for connecting a brake pedal and a power assist mechanism, provided according to some embodiments of the present application.
[0029] like Figure 2 As shown, the redundant structure connecting the brake pedal and the booster mechanism according to some embodiments of this application includes a pedal arm 100, a welding pin 110, a bushing 120, and a booster push rod 200. The welding pin 110 is disposed on the pedal arm 100; the bushing 120 is clearance-fitted with the welding pin 110, and the welding pin 110 has a groove on it, allowing the bushing 120 to rotate outside the groove, which prevents the bushing 120 from disengaging from the welding pin 110; the booster push rod 200 is rotatably connected to the bushing 120.
[0030] In this embodiment, the welding pin 110 is fixed to the pedal arm 100. When the driver presses the brake pedal, the pedal arm 100 amplifies the force of pressing the pedal through the lever principle. This force is then transmitted to the booster push rod 200 via the welding pin 110, pushing the booster push rod 200 to move axially and transmitting the pedal force to the vacuum booster. The cotter pin 300 and the clamp 400 are located at the end of the welding pin, limiting the booster push rod 200. Even if the cotter pin 300 and the clamp 400 are worn or fatigued and fall off, the pedal arm 100 will not detach from the booster push rod 200, thus avoiding brake failure caused by component detachment and further enhancing the reliability of the structure.
[0031] It should be noted that the bushing 120 can be press-fitted onto the welding pin 110 according to actual needs and application scenarios, or it can be snapped onto the external necking structure of the welding pin 110 through a clearance fit groove to prevent the bushing 120 from detaching from the welding pin.
[0032] In some possible embodiments, such as Figure 2As shown, bushing 120 is disposed between welding pin 110 and booster push rod 200, and bushing 120 is used for lubrication and noise reduction.
[0033] In this embodiment, the bushing 120 is clearance-fitted with the booster push rod 200, and the welding pin 110 is welded to the pedal arm 100. The bushing 120 allows the pedal arm 100 with the welding pin 110 and the booster push rod 200 to rotate relative to each other, and the bushing 120 will not detach from the welding pin 110, so the booster push rod 200 will not detach from the pedal arm 100, effectively preventing the problem of brake failure. At the same time, the bushing 120 acts between the welding pin 110 and the booster push rod 200, which can prevent direct metal collision from causing abnormal noise and wear, and play a role in lubrication and noise reduction.
[0034] In some possible embodiments, such as Figure 2 As shown, the welding pin 110 and the bushing 120 are an integral structure.
[0035] In this embodiment, the bushing 120 can rotate only around the welding pin 110 without disengaging from the welding pin 110, thereby maintaining the connection stability between the booster push rod 200 and the pedal arm 100. The bushing 120 can also be press-fitted onto the welding pin 110.
[0036] In some possible embodiments, bushing 120 is a nylon bushing.
[0037] In this embodiment, the bushing 120 can be made of POM or nylon material according to actual needs and application scenarios. Both materials have high resistance and can be used in automotive pollution environments, reducing the probability of structural failure due to corrosion. The bushing 120 also has the functions of maintaining lubrication, reducing friction, and reducing vibration and noise.
[0038] In some possible embodiments, such as Figure 2 As shown, the booster push rod 200 has a closed annular profile, and the two opposite surfaces of the booster push rod 200 are planes.
[0039] In this embodiment, to match the welding pin 110, the booster push rod is designed as a closed ring structure, which together with the pedal arm 100 with the welding pin 110 achieves a redundant function.
[0040] In some possible embodiments, such as Figure 1 As shown, the redundant structure also includes: a cotter pin 300 and a through-welded pin 110 for limiting the push rod 200 of the booster; and a clamping piece 400, which is disposed on the cotter pin 300 for limiting the cotter pin 300.
[0041] In this embodiment, the cotter pin 300 is inserted into the welding pin 110 and is located outside the booster push rod 200 to limit the booster push rod 200 and prevent the booster push rod 200 from being dislodged from the welding pin 110 by radial external force; the clamp 400 limits the cotter pin 300 and improves the limiting effect on the booster push rod 200.
[0042] In some possible embodiments, such as Figure 1 As shown, the cotter pin 300 is irregularly shaped and matches the clip 400.
[0043] In this embodiment, the cotter pin 300 is shaped like the letter "C". Its external shape can fit the outer wall of the welding pin 110 to form a hook shape. The "C"-shaped bend provides preload force to prevent the cotter pin 300 from falling off axially under vibration or impact, thereby improving stability.
[0044] In some possible embodiments, such as Figure 2 As shown, the clip 400 has a receiving cavity for receiving the cotter pin 300.
[0045] In this embodiment, the receiving cavity of the clip 400 forms a mechanical constraint by wrapping the cotter pin 300 with a shape matching, thereby limiting the axial displacement of the cotter pin 300. Furthermore, the sidewall of the clip 400 fits against the cotter pin 300, which can reduce radial sway and thus improve overall stability.
[0046] In some possible embodiments, such as Figure 3 As shown, the welding pin 110 has a through hole for accommodating the cotter pin 300.
[0047] In this embodiment, the cotter pin 300 is inserted into the through hole of the welding pin 110 and cannot be pulled out axially, thus avoiding the cotter pin 300 from falling off due to vibration or impact.
[0048] In some possible embodiments, such as Figure 1 , Figure 2 As shown, the booster push rod 200 includes a first contact end and a second contact end opposite to each other, the first contact end being close to the bushing 120 and the second contact end being close to the clip 400.
[0049] In this embodiment, the end of the booster push rod 200 is made into two opposing planes. The first plane contacts the bushing 120, and the second plane contacts the clip 400 to form a mechanical limit. The clip 400 can prevent the booster push rod 200 from coming off.
[0050] When the redundant structure connecting the brake pedal and the booster mechanism is in operation, it is fixed at the vehicle's brake pedal position. The welding pin 110 is welded to the pedal arm 100, and the bushing 120 is fitted over the welding pin 110. The bushing 120 is axially positioned by the engagement of a slot with the welding pin 110, allowing the bushing 120 to rotate around the welding pin 110. The booster push rod 200 has a closed ring structure and is positioned outside the bushing 120. The cotter pin 300 is inserted into the through hole of the welding pin 110, and the clip 400 is mounted on the cotter pin 300, limiting its position by enclosing it with a receiving cavity. During actual driving, when the driver depresses the pedal, the pedal arm 100 amplifies the force applied by the foot by lever principle, which is then transmitted through the welding pin... 110 acts on the booster push rod 200, pushing the booster push rod 200 to move axially, transmitting the pedal force to the vacuum booster. The cotter pin 300 and the clamp 400 prevent the booster push rod 200 from disengaging from the welded pin 110 under radial external force, improving the limiting effect. Furthermore, through the design of the bushing 120 and the welded pin 110, even if the cotter pin 300 and the clamp 400 are worn and fatigued and fall off, the bushing 120 will not disengage from the welded pin 110. The bushing 120 is connected to the booster push rod 200, and the welded pin 110 is connected to the pedal arm 100, so the booster push rod 200 will not disengage from the pedal arm 100, thus maintaining the vehicle's braking function even under extreme conditions and improving driver safety.
[0051] In this application, it should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0053] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. The term "multiple" refers to two or more, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0054] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0055] In this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0056] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A redundant structure of a brake pedal and a booster mechanism connection, characterized by, The utility model relates to a pedal arm (100) and a welding pin (110) arranged on the pedal arm (100), a bushing (120) in clearance fit with the welding pin (110), a clamping groove being arranged on the welding pin (110), the bushing (120) being rotatable outside the clamping groove, the clamping groove being used for preventing the bushing (120) from being separated from the welding pin (110), and an assistor push rod (200) in rotational connection with the bushing (120). The bushing (120) is arranged between the welding pin (110) and the assistor push rod (200), and is used for lubrication and noise reduction. The welding pin (110) and the bushing (120) are in an integrated structure. The bushing (120) is a nylon bushing. The assistor push rod (200) has a closed annular profile, and two opposite surfaces of the assistor push rod (200) are flat.
2. The redundant structure of a brake pedal and a power unit connection according to claim 1, characterized in that: The redundant structure further comprises an open pin (300) penetrating through the welding pin (110) and used for limiting the assistor push rod (200), and a clamping piece (400) arranged on the open pin (300) and used for limiting the open pin (300).
3. The redundant structure of a brake pedal and a power unit connection according to claim 2, characterized in that: The open pin (300) has a special shape and matches the clamping piece (400).
4. The redundant structure of a brake pedal and a power unit connection according to claim 3, characterized in that: The clamping piece (400) has a containing cavity, and the containing cavity is used for containing the open pin (300).
5. The redundant brake pedal and booster connection of claim 1, wherein: The welding pin (110) is provided with a through hole, and the through hole is used for containing the open pin (300).
6. The redundant brake pedal and booster connection of claim 1, wherein, The assistor push rod (200) comprises opposite first and second contact ends, the first contact end is close to the bushing (120), and the second contact end is close to the clamping piece (400). 7. The redundant brake pedal and booster connection of claim 6, wherein: 8. The redundant brake pedal and booster connection of claim 6, wherein: 9. The redundant brake pedal and booster connection of claim 6, wherein: 10. The redundant brake pedal and booster connection of claim 6, wherein: