CN112277910A - Multi-stage elastic assembly applied to pedal simulation mechanism - Google Patents

Abstract

The invention discloses a multistage elastic assembly applied to a pedal simulation mechanism, which comprises a guide rod, wherein a spring supporting seat, a third elastic member and a bearing seat are sequentially sleeved on the periphery of the guide rod from back to front, a second elastic member is further arranged between the spring supporting seat and the bearing seat, and at least one of the spring supporting seat and the bearing seat can move back and forth relative to the guide rod. Its technical scheme can regard multistage elastic component as an independent subassembly and input push rod subassembly to link mutually to the transmission of power is more steady reliable in whole footboard sensation simulation action, the dismouting of being convenient for simultaneously.

Description

Multi-stage elastic assembly applied to pedal simulation mechanism

Technical Field

The invention relates to the technical field of pedal simulation systems, in particular to a multi-stage elastic assembly applied to a pedal simulation mechanism.

Background

In the pedal and brake system of the automobile, two types are designed at present, one is a non-decoupling type, and the other is a decoupling type.

The non-decoupling type design is characterized in that the input push rod and the output push rod are in a linkage state under any working condition of the booster. The realization of helping hand is similar with traditional vacuum booster, and the helping hand size is by the output torque of perception difference displacement sensor's signal adjustment motor helping hand.

The decoupling type design is characterized in that pedal feeling is realized by serially connected spring loads, and the input push rod and the output push rod are in a separated state during normal braking. The output torque of the motor assistance is adjusted according to the signal input into the push rod stroke sensor.

For the decoupling type design, the pedal feel reality is poor due to the fact that the two-stage series spring load cannot completely simulate the pedal feel. Meanwhile, the series springs can reduce the braking force efficiency, and particularly when the electric failure occurs, the output pressure is difficult to meet the regulation requirement, so that the matching has certain limitation.

Referring to the chinese patent with the patent application number of 2017102247055, "a three-stage pedal feel simulator and an automotive brake pedal mechanism thereof", it discloses a three-stage pedal feel simulator and an automotive brake pedal mechanism thereof, the brake pedal mechanism includes a mounting bracket, a brake pedal, a three-stage pedal feel simulator and an induction sensor, the induction sensor is used for sensing the braking intention of a driver in advance, the pedal displacement sensor is used for accurately identifying the braking intention of the driver, the pedal displacement sensor includes a housing, a brake push rod, a first elastic component, a second elastic component, a third elastic component and an emergency switch. Compared with the prior art, the three-stage simulation mode of the single elastic assembly, the double elastic assembly and the third elastic assembly is adopted, so that the control feeling of the brake pedal mechanism can be effectively simulated.

The scheme can realize the purpose of simulating the pedal feeling by adopting the multi-stage springs in the decoupling design, but a plurality of elastic components are mixed on the brake push rod, so that the force transmission among the elastic components is not stable and reliable enough in the moving process of the brake push rod under the force exerted by the pedal, and the disassembly and the assembly are not convenient.

Disclosure of Invention

In view of the above problems in the prior art, a multi-stage elastic assembly applied to a pedal simulation mechanism is provided to overcome the above technical shortcomings, wherein the multi-stage elastic assembly is used as an independent assembly to enable the force transmission in the whole pedal feeling simulation action to be more stable and reliable, and is convenient to assemble and disassemble.

The specific technical scheme is as follows:

the utility model provides a be applied to multistage elastic component in footboard analog mechanism, includes the guide arm, and the spring bearing, third elastic component and bearing frame are overlapped from back to front in proper order to the guide arm periphery, and still install the second elastic component between spring bearing and the bearing frame, in spring bearing and the bearing frame, at least one of them can be for the guide arm back-and-forth movement.

Preferably, the spring supporting seat is fixedly arranged on the periphery of the guide rod, and the bearing seat is movably sleeved on the periphery of the guide rod and can move back and forth along the periphery of the guide rod.

Preferably, the rear end of the guide rod is provided with a shaft hole.

Preferably, the second elastic member is a cylindrical coil spring.

Preferably, the third elastic member is a damper elastic block.

Preferably, a gap is formed between the third elastic member and the bearing seat.

Preferably, the outer periphery of the guide rod is provided with a step for limiting the front end of the third elastic member, and the rear end of the third elastic member is limited by the front side surface of the spring supporting seat.

Preferably, the rear end face of the bearing seat is further recessed forwards to form an annular mounting groove, a bearing is embedded in the annular mounting groove, an inner ring of the bearing is sleeved with the inner edge of the annular mounting groove, and an outer ring of the bearing can rotate freely.

The beneficial effects of the above technical scheme are that:

the input push rod assembly applied to the pedal simulation mechanism comprises a guide rod, a spring supporting seat, a third elastic member, a bearing seat and a second elastic member, and can be used for connecting the multistage elastic assembly as an independent assembly with the input push rod assembly, so that the force transmission in the whole pedal simulation action is more stable and reliable, and the assembly and disassembly are convenient.

Drawings

FIG. 1 is a perspective view of a multi-stage resilient assembly for use in a pedal simulation mechanism in accordance with the present invention;

FIG. 2 is a cross-sectional view of a multi-stage resilient component of the present invention in use in a pedal simulation mechanism;

FIG. 3 is a cross-sectional view of the multi-stage resilient assembly of the present invention in use in a pedal simulation mechanism;

FIG. 4 is a sectional view of the input push rod assembly and the multi-stage elastic assembly shown in FIG. 3;

FIG. 5 is an exploded view of the mounting structure of the displacement sensor on the pedal mechanism;

fig. 6 is a cross-sectional view of the pedal simulator mechanism applied to the decoupling assembly.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the following embodiments are specifically described with reference to the attached drawings.

Referring to fig. 1 and 2, the structure of the multi-stage elastic component of the present invention is schematically illustrated; fig. 3 to fig. 6 are schematic views illustrating an application of the multistage elastic assembly of the present invention. And defines the direction from left to right as viewed on the paper in fig. 1 as the direction from back to front in this embodiment. The multistage elastic assembly comprises a guide rod 21, a spring supporting seat 22, a third elastic member 23 and a bearing seat 24 are sequentially sleeved on the periphery of the guide rod 21 from back to front, a second elastic member 26 is further installed between the spring supporting seat 22 and the bearing seat 24, and at least one of the spring supporting seat 22 and the bearing seat 24 can move back and forth relative to the guide rod 21.

In a specific application, the pedal simulation mechanism in this case further includes an input push rod assembly 1, the input push rod 11 of the input push rod assembly 1 is disposed opposite to the guide rod 21, and the front end of the first elastic member 14 of the input push rod assembly 1 abuts against the spring supporting seat 22 of the multi-stage elastic assembly 2, so that in this embodiment, the input push rod assembly 1 and the multi-stage elastic assembly 2 are respectively used as a stand-alone member, and only have an interactive linkage relationship, instead of sharing the structure of one input push rod, and as shown in fig. 3 and 4, the input push rod assembly 1 includes: an input push rod 11, the rear end of which constitutes a connecting part for connecting an external pedal; the dustproof cover group is clamped on the periphery of the input push rod 11; and a first elastic member 14 sleeved on the periphery of the input push rod 11 and located at the front position of the dust cover group, and the rear end of the first elastic member 14 abuts against the dust cover group. So that the multi-stage elastic component can receive the force given by the input push rod component 1 to further realize the action of pedal feeling simulation. Meanwhile, the dust cover group includes a front dust cover 13 and a rear dust cover 12 which are adjacently arranged in the front and rear.

Based on the above technical solution, the input push rod assembly applied to the pedal simulation mechanism provided in this embodiment includes the guide rod 21, the spring support 22, the third elastic member 23, the bearing seat 24, and the second elastic member 26, and can link the multi-stage elastic assembly 2 with the input push rod assembly 1 as an independent assembly, so that the force transmission in the whole pedal simulation motion is more stable and reliable, and the assembly and disassembly are convenient.

In a preferred embodiment, the spring support 22 is fixed to the outer periphery of the guide rod 21, and the bearing support 24 is movably sleeved on the outer periphery of the guide rod 21 and can move back and forth along the outer periphery of the guide rod 21. However, the bearing seat 24 may be fixedly connected to the guide rod 21, the spring support 22 may be slidably connected to the outer periphery of the guide rod 21, or both the two may be movable, and the third elastic member 23 is fixedly installed on the outer periphery of the guide rod 21, so that the second elastic member 26 and the third elastic member 23 can be sequentially urged to act in the process of gradually applying force to the pedal, but the invention is not limited thereto. Further, the rear end of the guide rod 21 is provided with a shaft hole, and in specific application, at least a part of the front end of the input push rod 11 of the input push rod assembly 1 extends into the shaft hole, and the rear end of the first elastic member 14 of the input push rod assembly abuts against the spring support 22.

In a further preferred embodiment, the second elastic member 26 is a cylindrical coil spring and the third elastic member 23 is a damper elastic block, but both springs may be used. Further, the third elastic member 23 has a gap with the bearing housing 24. Further, the outer circumference of the guide bar 21 is formed with a step for limiting the front end of the third elastic member 23, and the rear end of the third elastic member 23 is limited by the front side of the spring support 22. Furthermore, the rear end face of the bearing seat 24 is recessed forward to form an annular mounting groove, a bearing 25 is embedded in the annular mounting groove, the inner ring of the bearing 25 is sleeved with the inner edge of the annular mounting groove, and the outer ring of the bearing 25 can rotate freely.

Specifically, the shell 3 is formed by injection molding of PA66-GF35, the front dust cover 13 and the rear dust cover 12 are both butterfly-shaped and made of POM materials, the bearing seat 24 is a stamping forming part and is in interference fit with the bearing 25, the guide rod 21 is a machining part, the sheath 5 is made of EPDM materials, and the fixing ring 4 is formed by encapsulation injection molding. It is worth pointing out that the multi-stage elastic component 2 is a core part of the pedal simulation mechanism, and is an internal force component, and because the multi-stage elastic component is not mechanically connected with the output of the main cylinder of the external decoupler in a normal state, the requirements of both the pedal feeling of a driver and the NVH (noise vibration and harshness) are met, the multi-stage elastic component has high requirements on the material, the dimensional accuracy, the performance and the appearance quality of the part.

In the concrete application, footboard analog mechanism still includes shell 3, shell 3 wholly is the open tube-shape in front end, and inside constitutes to have the chamber that holds that is used for holding at least partly of input push rod subassembly 1 and at least partly of multistage elastic component 2, and shell 3 rear end face offers the installation through-hole that is used for passing input push rod 11, and the rear end card of shell 3 is arranged in annular mounting groove, and preceding shield 13 and back shield 12 hug closely respectively in the front and back side of installation through-hole and centre gripping shell 3 for allow shell 3 can with input push rod 11 simultaneous movement. The outer portion of the shell 3 is further provided with a sheath 5 and a fixing ring 4, the fixing ring 4 is sleeved on the periphery of the shell 3 and allows the shell 3 to move back and forth relative to the fixing ring 4, the sheath 5 is integrally of a cylindrical structure with an open front end face and sleeved on the periphery of the fixing ring 4, the front end of the sheath 5 is provided with a through hole used for penetrating through the input push rod 11, and the shell 3 is accommodated inside the sheath 5. Further referring to fig. 6, the pedal simulation mechanism is applied to a decoupling device, which further includes a displacement sensor 6, a linkage mechanism 7, and a driving mechanism and a power assisting mechanism not shown in the figure, wherein a sensing portion 61 of the displacement sensor 6 is mounted on the periphery of the front end of the housing 3, and a detecting portion 62 of the displacement sensor is mounted on the fixing ring, so that when the input push rod assembly 1 moves forward along with the pedal, the sensing portion 61 and the detecting portion 62 arranged oppositely can detect the displacement change and transmit a signal to a circuit board of the displacement sensor in real time, and further the driving mechanism and the power assisting mechanism are driven to move accordingly, so as to implement the braking action while realizing the pedal feeling simulation.

The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (8)

1. The multistage elastic assembly applied to the pedal simulation mechanism is characterized by comprising a guide rod (21), wherein a spring supporting seat (22), a third elastic member (23) and a bearing seat (24) are sequentially sleeved on the periphery of the guide rod (21) from back to front, a second elastic member (26) is further installed between the spring supporting seat (22) and the bearing seat (24), and at least one of the spring supporting seat (22) and the bearing seat (24) can move back and forth relative to the guide rod (21).

2. The multistage elastic assembly applied to the pedal simulation mechanism according to claim 1, wherein the spring supporting seat (22) is fixedly arranged on the periphery of the guide rod (21), and the bearing seat (24) is movably sleeved on the periphery of the guide rod (21) and can move back and forth along the periphery of the guide rod (21).

3. The multistage elastic assembly applied to a pedal simulation mechanism according to claim 1, wherein the guide rod (21) is provided with a shaft hole at a rear end thereof.

4. The multistage elastic assembly applied to a pedal simulation mechanism according to claim 1, wherein the second elastic member (26) is a cylindrical coil spring.

5. Multistage elastic assembly applied in a pedal simulation mechanism according to claim 4, characterized in that said third elastic member (23) is a shock-absorbing elastic block.

6. Multistage elastic assembly applied in a pedal simulation mechanism according to claim 5, characterized in that there is a clearance between the third elastic member (23) and the bearing seat (24).

7. The multistage elastic assembly applied to a pedal simulation mechanism according to claim 6, wherein the guide bar (21) is formed at its outer periphery with a step for restraining the front end of the third elastic member (23), and the rear end of the third elastic member (23) is restrained by the front side of the spring support base (22).

8. The multistage elastic assembly applied to a pedal simulation mechanism according to claim 1, wherein the rear end surface of the bearing seat (24) is further recessed forward to form an annular mounting groove, a bearing (25) is embedded in the annular mounting groove, the inner ring of the bearing (25) is sleeved with the inner edge of the annular mounting groove, and the outer ring of the bearing (25) can rotate freely.

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