阅读说明：本技术 一种可变杠杆比的制动踏板 (Brake pedal with variable lever ratio ) 是由 潘启印 冯登荣 于 2019-09-24 设计创作，主要内容包括：本发明涉及一种可变杠杆比的制动踏板。包括制动踏板座、制动踏板臂和助力器推杆,制动踏板臂在其与助力器推杆铰接处设置有调节螺杆,调节螺杆上套装有螺杆套,并旋接有两只锁紧螺母,助力器推杆的一端与螺杆套铰接。本发明在不影响制动踏板臂强度和刚度的前提下,能够方便地调节改变制动踏板的杠杆比。(The invention relates to a brake pedal with a variable lever ratio. The brake pedal comprises a brake pedal seat, a brake pedal arm and a booster push rod, wherein an adjusting screw rod is arranged at the hinged position of the brake pedal arm and the booster push rod, a screw rod sleeve is sleeved on the adjusting screw rod and is connected with two locking nuts in a screwed mode, and one end of the booster push rod is hinged to the screw rod sleeve. The invention can conveniently adjust and change the lever ratio of the brake pedal on the premise of not influencing the strength and the rigidity of the brake pedal arm.)

1. The utility model provides a brake pedal of variable lever ratio, includes brake pedal seat (1), brake pedal arm (5) and booster push rod (2), and brake pedal arm upper end is articulated with brake pedal seat, and the one end of booster push rod is articulated with brake pedal arm, its characterized in that: the brake pedal arm is provided with adjusting screw (8) in its department that articulates with booster push rod, and adjusting screw is parallel with the plane at brake pedal arm place, and the cover is equipped with screw rod cover (7) on it to connect two lock nut (6) soon, screw rod cover and adjusting screw sliding fit, two lock nut are located the both ends of screw rod cover respectively, the one end of booster push rod is articulated with the screw rod cover, realizes the articulated of booster push rod and brake pedal arm through screw rod cover and adjusting screw.

2. The variable lever ratio brake pedal of claim 1, wherein: and an installation notch (9) is formed in the edge of the hinged position of the brake pedal arm (5) and the booster push rod (2), and the adjusting screw rod (8) is fixed at two ends of the opening of the installation notch in a bridging manner.

3. The variable lever ratio brake pedal according to claim 1 or 2, characterized in that: the adjusting screw rod (8) is positioned in the plane of the brake pedal arm (5).

Technical Field

The invention relates to a component in a brake system of an automobile, in particular to a brake pedal.

Background

The brake pedal is a component in an automobile brake system and comprises a brake pedal seat 1, a brake pedal arm 5 and a booster push rod 2, wherein as shown in figure 5, the upper end of the brake pedal arm 5 is hinged with the brake pedal seat 1, and one end of the booster push rod 2 is hinged with the brake pedal arm 5. The lever ratio (i.e., X/Y, wherein X is the distance between a pedal at the lower end of a brake pedal arm and a hinged shaft at the upper end of the brake pedal arm, and Y is the distance between a hinged shaft between a booster push rod and the brake pedal arm and a hinged shaft at the upper end of the brake pedal arm) of the conventional brake pedal is fixed and cannot be adjusted and changed. However, in the development of new vehicles, brake pedals with various lever ratios are often used, and the brake pedal with each lever ratio needs to be newly developed for the mold of the brake pedal seat and the brake pedal arm, which inevitably increases the development period and the development cost of products.

In order to solve the problem, CN2014108146340 discloses an automobile brake pedal structure capable of adjusting a lever ratio, which comprises a brake pedal arm, a vacuum booster push rod and a brake pedal main bracket, wherein the technical scheme is that waist-shaped holes are formed in the joint of the brake pedal arm and the brake pedal main bracket, and the lever ratio is changed by adjusting the relative position of the joint of the brake pedal arm and the brake pedal main bracket. However, since the connection between the brake pedal arm and the main brake pedal bracket is hinged, it seems that this solution cannot be implemented, even if it can be implemented, since both dimensions X, Y are being changed at the same time, which results in a smaller adjustment of the lever ratio.

CN2016112221057 discloses an automatic pedal mechanism and a preparation process, the brake pedal mechanism includes a brake pedal connecting frame, a brake pedal arm and a telescopic mechanism disposed on the brake pedal arm, and the lever ratio is changed by adjusting the length of the brake pedal arm through the telescopic mechanism disposed on the brake pedal arm. According to the technical scheme, the telescopic mechanism is additionally arranged on the brake pedal arm, so that the integrity of the brake pedal arm is damaged, and the strength and the rigidity of the brake pedal arm are greatly reduced.

Disclosure of Invention

The invention aims to provide a brake pedal with a variable lever ratio, which can conveniently adjust and change the lever ratio of the brake pedal on the premise of not influencing the strength and the rigidity of a brake pedal arm.

The invention relates to a lever ratio variable brake pedal which comprises a brake pedal seat, a brake pedal arm and a booster push rod, wherein the upper end of the brake pedal arm is hinged with the brake pedal seat, one end of the booster push rod is hinged with the brake pedal arm, the brake pedal arm is provided with an adjusting screw rod at the hinged part of the brake pedal arm and the booster push rod, the adjusting screw rod is parallel to the plane where the brake pedal arm is located, a screw sleeve is sleeved on the adjusting screw rod and is in screwed connection with two locking nuts, the screw sleeve is in sliding fit with the adjusting screw rod, the two locking nuts are respectively located at two ends of the screw sleeve, one end of the booster push rod is hinged with the screw sleeve, and the booster push rod is hinged with the brake pedal.

The edge of the hinged position of the brake pedal arm and the booster push rod is provided with an installation notch, and the adjusting screw rod is fixed at two ends of the opening of the installation notch in a bridging manner.

The adjusting screw rod is positioned in the plane of the brake pedal arm.

When the lever ratio of the brake pedal needs to be adjusted and changed, the locking nut is loosened, the screw sleeve is moved to a proper position on the adjusting screw along the adjusting screw, and then the locking nut is rotated to two ends of the screw sleeve to lock and fix the screw sleeve.

The invention realizes the change of the lever ratio by changing the size of Y under the condition that the length of the brake pedal arm is not changed, and the adjustment of the size of Y is realized by changing the position of the screw rod sleeved on the adjusting screw rod, so the adjustment and the change of the lever ratio of the brake pedal are very convenient. The invention only adds the adjusting screw rod, the screw rod sleeve and the locking nut which are matched with the adjusting screw rod on the brake pedal arm, has little change on the structure of the brake pedal, and does not damage the integrity of the structure of the brake pedal arm, thereby not influencing the strength and the rigidity of the brake pedal arm.

Drawings

FIG. 1 is an isometric view of a variable lever ratio brake pedal of the present invention.

Fig. 2 is an exploded view of the variable lever ratio brake pedal of the present invention.

Fig. 3 is an isometric view of a locking nut securing the screw housing to the adjustment screw.

Fig. 4 is a front view of the brake pedal arm.

FIG. 5 is an isometric view of a prior art brake pedal with an unchangeable lever ratio.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, 2 and 3, the variable lever ratio brake pedal comprises a brake pedal seat 1, a brake pedal arm 5 and a booster push rod 2, wherein the upper end of the brake pedal arm 5 is hinged to the brake pedal seat 1, one end of the booster push rod 2 is hinged to the brake pedal arm 5, an installation notch 9 is formed in the edge of the hinged portion of the brake pedal arm 5 and the booster push rod 2, an adjusting screw rod 8 is arranged at the installation notch 9, the adjusting screw rod 8 is fixed to two ends of the opening portion of the installation notch 9 in a bridging welding mode, and the adjusting screw rod 8 is located in the plane where the brake pedal arm 5 is located. The adjusting screw 8 is sleeved with a screw sleeve 7 and is screwed with two locking nuts 6, the screw sleeve 7 is in sliding fit with the adjusting screw 8, and the two locking nuts 6 are respectively positioned at two ends of the screw sleeve 7. One end of the booster push rod 2 is hinged with a screw sleeve 7 through a pin 3, so that the booster push rod 2 is hinged with the brake pedal arm 5 through the screw sleeve 7 and an adjusting screw 8.

As shown in fig. 4, when the lever ratio of the brake pedal needs to be adjusted and changed, the locking nut 6 is loosened, the screw sleeve 7 is moved to a proper position on the adjusting screw 8 along the adjusting screw 8, and then the locking nut 6 is rotated to two ends of the screw sleeve 7 to lock and fix the screw sleeve 7. At this time, Y is changed while X is unchanged, resulting in a change in the lever ratio X/Y of the brake pedal.