CN215204838U

CN215204838U - Brake pedal

Info

Publication number: CN215204838U
Application number: CN202120853380.9U
Authority: CN
Inventors: 朱璐; 肖仙斌
Original assignee: Zhejiang Zero Run Technology Co Ltd
Current assignee: Zhejiang Leapmotor Technology Co Ltd; Zhejiang Zero Run Technology Co Ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-12-17
Anticipated expiration: 2031-04-23

Abstract

The utility model discloses a brake pedal, which is characterized by comprising a base, wherein the base is provided with a first rotating shaft, the base is provided with a first force arm through the rotation of the first rotating shaft, the first force arm is provided with a second force arm through the rotation of the first rotating shaft, and a second rotating shaft is arranged between the first force arm and the second force arm; the second force arm is provided with a flange extending to the lower part of the first force arm, the flange extends along the lower end of the edge of the second force arm, the end part of the first rotating shaft is provided with a reset torsion spring, the two ends of the reset torsion spring are respectively connected with the base and the first force arm, and the base is provided with a stop pin matched with the upper side of the first force arm; a baffle plate for limiting the lower side of the second force arm is arranged at the lower side of the first force arm; and the second force arm is provided with a mounting hole matched with the push rod of the booster. The utility model has the advantages of convenient assembling, structural reliability is high, has two kinds of changeable lever ratios, can eliminate braking system initial segment idle stroke fast, and driver's pedal power is not grow when the vehicle needs great brake force.

Description

Brake pedal

Technical Field

The application relates to the technical field of braking systems, in particular to a brake pedal.

Background

The driver steps on the brake pedal in the cab, the brake pedal arm pushes the push rod of the vacuum booster to move forwards, the push rod pushes the piston of the main cylinder to move forwards, and brake fluid in the main cylinder is compressed, so that the four wheel brakes generate braking force to decelerate or stop the moving vehicle. In order to enable a driver to generate larger force for pushing a push rod of the vacuum booster by using smaller pedal force, a lever ratio is designed on a brake pedal, and the aim of saving labor is fulfilled by utilizing a lever principle. Conventional brake pedals are designed for a fixed lever ratio. In order to enable the same pedal force to generate a higher braking force, the pedal lever is larger than designed. However, although the large lever ratio reduces the force with which the driver steps on the pedal, the idle stroke of the entire brake system is amplified, resulting in the distinct feeling that: from the beginning of stepping on the brake pedal to the braking force generation, the travel of the pedal is increased, and the subjective feeling of people is that the travel of the front section of the brake pedal is empty, the braking feeling is poor, and the braking confidence of a driver is influenced. The braking distance is lengthened, and the driving safety is influenced. If the lever ratio is too small, the idle stroke can be eliminated quickly, but the pedal force required for generating the same braking force becomes large, and national regulations after the assistance failure cannot be met, and the braking feeling also becomes poor.

In chinese patent literature, patent No. CN2020105518008, the invention patent of which is disclosed in 20/10/2020, discloses a variable lever ratio brake pedal, which comprises a pedal bracket, a first-stage pedal arm, a second-stage pedal arm, a T-shaped pin shaft, a guide block and a brittle gasket; the first-stage pedal arm comprises two arm plates which are symmetrically arranged, and the arm plates are sequentially provided with a first rotating shaft hole, a pin shaft hole and a second rotating shaft hole from top to bottom; a rotating shaft sleeve is assembled in the first rotating shaft hole of the arm plate, a rotating shaft bushing is assembled on the rotating shaft sleeve of the two arm plates, and the two arm plates are fixed on the pedal bracket in a way that the two arm plates can rotate around the first rotating shaft by the first rotating shaft penetrating through the rotating shaft bushing; the pin shaft rods of the T-shaped pin shafts are arranged in the pin shaft holes of the two arm plates, the guide blocks are sleeved on the middle vertical rod of the T-shaped pin shaft, the middle vertical rod of the T-shaped pin shaft is also sleeved with a spiral spring, and the spiral spring is positioned between the bottom of the guide blocks and the pin shaft rods of the T-shaped pin shaft; the brittle gasket is locked to the upper end of the guide block through a nut matched with the guide block, a middle vertical rod of the T-shaped pin shaft is in contact with the brittle gasket, and two side walls of the guide block are clamped and fixed by the two arm plates; a second rotating shaft through hole and a booster push rod hole are sequentially formed in the upper portion of the second-stage pedal arm from top to bottom, and the first-stage pedal arm and the second-stage pedal arm are fixedly connected through a second rotating shaft penetrating through the second rotating shaft hole and the second rotating shaft through hole; the upper end face of the second-stage pedal arm is a curved surface with a clamping gap, before the lever ratio is not triggered, the pin shaft rod of the T-shaped pin shaft is clamped on the clamping gap of the curved surface of the second-stage pedal arm, and the T-shaped pin shaft is adjacent to the pedal support but is not in contact with the pedal support. The disadvantages are that: 1. a spring is arranged on the T-shaped pin shaft for resetting and providing pressure, the position of the clamping gap is small, and the potential danger of the clamping gap passing through the T-shaped pin shaft is caused; 2. when brake pedal wholly assembles, T type round pin axle cooperates as moving part and second level pedal arm, and two moving part assemblies need higher precision and certain assembly proficiency, and also assembly efficiency is not high.

Disclosure of Invention

Based on prior art's the aforesaid is not enough, the utility model discloses a brake pedal, convenient assembling, structural reliability is high, has two kinds of changeable lever ratios, can eliminate braking system initial segment idle stroke fast, and driver's pedal power is not the grow when the vehicle needs great braking force.

In order to achieve the above purpose, the present invention adopts the following technical solution.

A brake pedal is characterized by comprising a base, wherein a first rotating shaft is arranged on the base, the base is provided with a first force arm through the rotation of the first rotating shaft, a second force arm is arranged on the first force arm in a rotating mode, and a second rotating shaft is arranged between the first force arm and the second force arm; the second force arm is provided with a flange extending to the lower part of the first force arm, the flange extends along the lower end of the edge of the second force arm, the end part of the first rotating shaft is provided with a reset torsion spring, the two ends of the reset torsion spring are respectively connected with the base and the first force arm, and the base is provided with a stop pin matched with the upper side of the first force arm; a baffle plate for limiting the lower side of the second force arm is arranged at the lower side of the first force arm; and the second force arm is provided with a mounting hole matched with the push rod of the booster.

The booster push rod of the mounting hole in the second force arm is matched, the flange has a downward movement trend, the baffle plate can limit the flange, the force of the reset torsion spring on the first force arm is greater than the pressure of the booster push rod on the second bottom wall in the initial stage of treading the pedal, the second force arm rotates around the second rotating shaft, the flange is separated from the baffle plate, and the baffle plate rotates towards the first rotating shaft; the driver continues to step on the brake pedal to enter a second stage, after the flange is connected with the outer side of the first rotating shaft, the first force arm and the second force arm are combined into a whole, the torque provided by the reset torsion spring for the first force arm is smaller than the torque borne by the brake pedal, the first force arm and the second force arm move around the first rotating shaft together to push the push rod of the booster to move forwards, the movement in the initial stage is designed to be a small lever, and the movement in the second stage is designed to be a large lever ratio, so that the idle stroke of a brake system can be quickly eliminated by using the principle that the distance can be saved by using the small lever ratio in the initial stage, the design requirements of the brake and the idle stroke of the vacuum booster can be released, the common vacuum booster and the brake can be selected, and the development cost of the vacuum booster and the brake can be reduced; the second-stage movement can realize the purpose of saving labor by utilizing a large lever ratio, the idle stroke of the brake is enlarged, the dragging torque of the brake is correspondingly reduced, the wheel side rolling resistance is reduced, and the cruising ability of the vehicle is increased; this application comes the baffle downside of spacing second arm of force through the baffle integrative with first arm of force, compares the brake pedal that current variable lever ratio and has higher spacing reliability, and the part compares prior art still less moreover, and the installation equipment is more convenient, has assembly efficiency and debugging ability higher than prior art.

Preferably, the first force arm comprises two limiting plates arranged in parallel, a gap is formed between the two limiting plates, the second force arm is arranged in the gap, a sleeve is connected between the two limiting plates, and the sleeve is matched with the first rotating shaft. The synchronous motion capability of the two limiting plates is ensured when the two limiting plates are connected through the sleeve, and the two limiting plates simultaneously limit the two sides of the second force arm, so that the stability of the first force arm and the second force arm rotating around the second rotating shaft is ensured.

Preferably, the outer end of the rib is provided with a transition round angle. The setting of transition fillet improves baffle pivoted security, improves the intensity of baffle tip.

Preferably, the rib is provided with an arc-shaped recess corresponding to the outer side of the sleeve. The arc-shaped recess can be reliably attached to the sleeve, so that after the flange is attached to the sleeve, the integrity of the first force arm and the second force arm is better, and the service life of the sleeve is prolonged.

Preferably, the two sides of the first force arm are respectively provided with a reset torsion spring, the two ends of the reset torsion springs are respectively provided with a vertical section, and the base and the limiting plate are respectively provided with a limiting hole matched with the vertical section. The reset torsion spring can be reliably connected with the base and the limiting plate through the vertical section, and the position after installation is fixed and difficult to slip, so that the reset torsion spring has higher structural compactness and firmness.

Preferably, the sleeve extends to the outer parts of the two limit plates opposite to each other to form a mounting pipe, and the reset torsion spring is sleeved outside the mounting pipe. The reset torsion spring is fixedly matched with the installation pipe, and compared with the reset torsion spring, the reset torsion spring is directly arranged on the first rotating shaft, the integrity of the reset torsion spring and the first force arm can be improved, and the matching performance of the torsion spring and the first force arm is better.

Preferably, a nut is arranged at one end of the first rotating shaft, and the other end of the first rotating shaft is connected with a nut through threads; the second rotating shaft is integrally and fixedly arranged at two sides of the second force arm. In the baffle is pegged graft into to the flange, during first arm of force and the installation of second force arm, the second rotation axis can be directly installed two limiting plates from the clearance between two limiting plates in, simple to operate later on two installation pipes of first force arm the pre-installation torsional spring, install first force arm again in the base, first rotation axis link up the shaping that brake pedal can be accomplished to sleeve pipe back nut locking, the position at each position is accurate during the installation, convenient assembling is swift.

The utility model discloses an useful part lies in: the two variable lever ratios are provided, so that the initial idle stroke of a braking system can be quickly eliminated, and the pedal force of a driver is not increased when a vehicle needs a large braking force; and convenient assembling, the structural reliability is high, and compactness and fastness are good.

Drawings

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

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a schematic structural diagram of the first force arm and the second force arm after being assembled according to the present invention.

Fig. 4 is a front view of fig. 1.

Fig. 5 is a cross-sectional view at a-a in fig. 4.

In the figure: a first rotating shaft 2 of a base 1, a first force arm 3, a limit plate 4, a gap 5, a sleeve 6, a second force arm 8, a second rotating shaft 9, a flange 10, an arc-shaped recess 11, a transition fillet 12, a reset torsion spring 13, a vertical section 14, a limit hole 15, a stop pin 16, a stop plate 17 and a pedal 19 are arranged in a mounting hole 18.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.

In the embodiment of the method, the first step,

as shown in fig. 1 to 5, a brake pedal is characterized by comprising a base 1, wherein a first rotating shaft 2 is arranged on the base 1, the base 1 is rotatably provided with a first force arm 3 through the first rotating shaft 2, one end of the first rotating shaft 2 is provided with a nut, and the other end of the first rotating shaft 2 is connected with a nut through threads; rotate on the first force arm 3 and be equipped with second force arm 8, first force arm 3 includes two parallel arrangement's limiting plate 4, is equipped with clearance 5 between two limiting plate 4, and second force arm 8 sets up in clearance 5, connects between two limiting plate 4 and is equipped with sleeve pipe 6, and two limiting plate 4 pass through sleeve pipe 6 fixed spacing, the first rotation axis 2 of sleeve pipe 6 cooperation. The sleeve 6 extends to the outer parts, opposite to each other, of the two limiting plates 4 to form a mounting pipe 7, and the reset torsion spring 13 is sleeved outside the mounting pipe 7. A second rotating shaft 9 is arranged between the first force arm 3 and the second force arm 8; the second rotating shaft 9 is integrally and fixedly arranged at two sides of the second force arm 8. Through holes matched with the second rotating shaft 9 are respectively arranged on the two limiting plates 4. The second force arm 8 is provided with a flange 10 extending to the lower part of the first force arm 3, the flange 10 extends along the lower end of the edge of the second force arm 8, and the flange 10 is provided with an arc-shaped recess 11 corresponding to the outer side of the sleeve 6. The outer end of the rib 10 is provided with a transition round angle 12. The tip of first rotation axis 2 is equipped with reset torsion spring 13, and base 1 and first arm of force 3 are connected respectively to reset torsion spring 13's both ends, and the both sides of first arm of force 3 are equipped with reset torsion spring 13 respectively, and reset torsion spring 13's both ends are equipped with vertical section 14 respectively, are equipped with the spacing hole 15 of cooperation vertical section 14 on base 1 and the limiting plate 4 respectively. The base 1 is provided with a stop pin 16 matched with the upper side of the first force arm 3; a baffle 17 for limiting the lower side of the second force arm 8 is arranged at the lower side of the first force arm 3; the second force arm 8 is provided with a mounting hole 18 matched with a push rod of the booster.

Because the booster push rod of the mounting hole 18 on the second force arm 8 is matched, the flange 10 has a downward movement trend, the baffle 17 is arranged to limit the flange 10, the force given to the first force arm 3 by the reset torsion spring 13 is greater than the pressure given to the second bottom wall by the booster push rod at the initial stage of treading the pedal 19, the second force arm 8 rotates around the second rotating shaft 9, the flange 10 is separated from the baffle 17, and the baffle 17 rotates towards the first rotating shaft 2; the driver continues to step on the brake pedal 19 to enter a second stage, when the flange 10 is connected with the outer side of the first rotating shaft 2, the first force arm 3 and the second force arm 8 are combined into a whole, the moment provided by the reset torsion spring 13 for the first force arm 3 is smaller than the moment borne by the brake pedal, the first force arm 3 and the second force arm 8 move around the first rotating shaft 2 and push the push rod of the booster to move forwards, the movement in the initial stage is designed to be a small lever ratio, namely L4/L3, and the movement in the second stage is designed to be a large lever ratio, namely L1/L2, so that the idle stroke of a brake system can be quickly eliminated by using the principle that the distance can be saved by using the small lever ratio in the initial stage, the design requirements of the brake and the idle stroke of the vacuum booster can be released, a common vacuum booster and the brake can be selected, and the development cost of the vacuum booster and the brake can be reduced; the second-stage movement can realize the purpose of saving labor by utilizing a large lever ratio, the idle stroke of the brake is enlarged, the dragging torque of the brake is correspondingly reduced, the wheel side rolling resistance is reduced, and the cruising ability of the vehicle is increased; this application comes spacing second force arm 8's baffle 17 downside through baffle 17 integrative with first force arm 3, and the brake pedal who compares current variable lever ratio has higher spacing reliability, and the part compares prior art still less moreover, and the installation equipment is more convenient, has assembly efficiency and debugging ability higher than prior art.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A brake pedal is characterized by comprising a base, wherein a first rotating shaft is arranged on the base, the base is provided with a first force arm through the rotation of the first rotating shaft, a second force arm is arranged on the first force arm in a rotating mode, and a second rotating shaft is arranged between the first force arm and the second force arm; the second force arm is provided with a flange extending to the lower part of the first force arm, the flange extends along the lower end of the edge of the second force arm, the end part of the first rotating shaft is provided with a reset torsion spring, the two ends of the reset torsion spring are respectively connected with the base and the first force arm, and the base is provided with a stop pin matched with the upper side of the first force arm; a baffle plate for limiting the lower side of the second force arm is arranged at the lower side of the first force arm; and the second force arm is provided with a mounting hole matched with the push rod of the booster.

2. The brake pedal of claim 1, wherein the first force arm includes two parallel limiting plates, a gap is provided between the two limiting plates, the second force arm is disposed in the gap, a sleeve is connected between the two limiting plates, and the sleeve is engaged with the first rotating shaft.

3. The brake pedal of claim 1 wherein the outer ends of the ribs are provided with transition radii.

4. The brake pedal of claim 2 wherein the rib defines an arcuate recess corresponding to the outer side of the sleeve.

5. The brake pedal according to claim 1 or 2, wherein the first force arm is provided at both sides thereof with a return torsion spring, the return torsion spring is provided at both ends thereof with vertical sections, and the base and the limiting plate are provided with limiting holes for engaging the vertical sections.

6. The brake pedal according to claim 2, wherein the sleeve extends to the outer portions of the two opposite sides of the two limiting plates to form a mounting tube, and the reset torsion spring is sleeved outside the mounting tube.

7. A brake pedal according to claim 1 or 2, wherein a nut is provided at one end of the first rotary shaft, and a nut is threadedly coupled to the other end of the first rotary shaft; the second rotating shaft is integrally and fixedly arranged at two sides of the second force arm.