CN112389390B - Pedal simulator used for electric booster - Google Patents
Pedal simulator used for electric booster Download PDFInfo
- Publication number
- CN112389390B CN112389390B CN202011280922.4A CN202011280922A CN112389390B CN 112389390 B CN112389390 B CN 112389390B CN 202011280922 A CN202011280922 A CN 202011280922A CN 112389390 B CN112389390 B CN 112389390B
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- China
- Prior art keywords
- push rod
- pedal
- electric booster
- friction
- damping piece
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/06—Disposition of pedal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Elements And Transmission Devices (AREA)
Abstract
The utility model provides a footboard simulator that electric booster used, includes ring flange, push rod and damping piece, the both ends of push rod are connected with brake master cylinder and footboard respectively, the push rod with the damping piece locate by the main cavity that the inner wall of ring flange encloses is internal, the push rod can be in under the drive of footboard slide in the main cavity is internal, the push rod can also with the slip in-process the damping piece with frictional force that produces between the ring flange turns into pedal sense and/or hysteresis and transmits extremely the footboard. According to the invention, a stepped pedal feeling is provided for a user when the user treads the pedal through the damping piece and the spring, a gradually increased damping feeling is provided for the user through the damping piece and the second friction cavity with the conical surface, a hysteresis feeling different along with the change of the pedal stroke can be generated when the user releases the pedal, and excellent use experience is provided for the driver by the electric booster.
Description
Technical Field
The invention relates to the technical field of automobile braking systems, in particular to a pedal simulator used for an electric booster.
Background
The new energy automobile is the development trend of the automobile industry at present, and the endurance mileage and the intellectualization of the new energy automobile are two important consideration indexes for evaluating the new energy automobile. The new energy automobile is characterized in that a conventional engine is not arranged, and a vacuum source cannot be provided for a power assisting module of a transmission braking system, and under the background, an electric booster, particularly a decoupling type electric booster becomes a perfect scheme for replacing the original vacuum booster. The electric booster can improve the whole braking energy recovery rate for the new energy vehicle, realizes intellectualization and can realize braking boosting without a vacuum source.
In addition to the implementation of the brake boosting function, the electric booster requires drivability that the driver be given a pedal feel that is close to that of a conventional vehicle, and that is even further optimized. The pedal feeling of the common electric booster on the market is mostly simulated by using a rigid spring, the difference between the pedal treading force and the pedal returning force is small, no hysteresis force exists, and excellent pedal feeling cannot be provided for a driver.
Disclosure of Invention
In view of the above, the present invention provides a pedal simulator for an electric booster having an excellent pedal feel.
The pedal simulator used by the electric booster comprises a flange plate, a push rod and a damping piece, wherein two ends of the push rod are respectively connected with a brake master pump and a pedal, the push rod and the damping piece are arranged in a main cavity body enclosed by the inner wall of the flange plate, the push rod can slide in the main cavity body under the driving of the pedal, the pedal simulator used by the electric booster also comprises a push rod frame, the pedal simulator used by the electric booster also comprises a spring, two ends of the spring are respectively abutted against the flange plate and the push rod frame, the spring can generate spring force to the push rod frame and the push rod when the push rod slides and convert the spring force into pedal feeling to be transmitted to the pedal, and the push rod can also convert the friction force generated between the damping piece and the flange plate in the sliding process into pedal feeling and/or hysteresis feeling to be transmitted to the pedal, the main cavity body is including adjacent and first friction chamber and the second friction chamber of establishing, the damping piece is located in the first friction chamber and with the inner wall laminating in first friction chamber, the second friction chamber with there is axial interval between the damping piece, the second friction chamber is for relative the conical surface that first friction chamber was restrainted gradually, the damping piece with the frictional force that second friction chamber friction produced can pass through the push rod turns into damping sense and hysteresis sense transmission extremely the footboard.
Furthermore, the push rod comprises a first rod body and a second rod body, the first rod body is connected with the pedal, the second rod body is connected with the brake master cylinder, the second rod body is axially inserted into the flange plate, and the first rod body and the second rod body are coaxially arranged in the flange plate.
Further, the pedal simulator used by the electric booster further comprises a push rod retaining seat, the push rod retaining seat is fixed in the flange, and the second rod body is limited in the flange along the circumferential direction by the push rod retaining seat.
Furthermore, the push rod further comprises a riveting piece, the first rod body and the second rod body are riveted into a whole through the riveting piece, a ball head is arranged on the riveting piece, and one end of the first rod body can pivot along the circumferential direction of the ball head.
Furthermore, the damping piece is fixed on the riveting piece, and the damping piece is attached to the inner wall of the flange plate.
Furthermore, the first rod body is axially inserted into the push rod frame and fixedly connected with the push rod frame into a whole.
Further, the pedal simulator that electric booster used still includes the dust cover, the dust cover is located outside the spring, the both ends of dust cover are fixed in respectively the push rod frame with on the ring flange.
The pedal simulator used by the electric booster provides a hierarchical pedal feeling for a user through the combination form of the flange plate, the push rod, the spring and the damping piece when the user tramples the pedal, provides a gradually increased damping feeling for the user through the damping piece and the second friction cavity with the conical surface, can generate a hysteresis feeling different along with the change of the pedal stroke when the user loosens the pedal, and provides excellent use experience for the driver through the electric booster.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic view of a pedal simulator used in an electric booster provided by the present invention.
Fig. 2 is a schematic diagram of a first friction chamber and a second friction chamber provided by the present invention.
FIG. 3 is a schematic of the pedal force versus pedal travel provided by the present invention.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.
Referring to fig. 1, the pedal simulator used in the electric booster of the present invention includes a flange 1, a push rod 2 and a damping member 3, wherein two ends of the push rod 2 are respectively connected to a master cylinder and a pedal, and the push rod 2 and the damping member 3 are disposed in a main cavity 101 surrounded by an inner wall of the flange 1. The pedal simulator used by the electric booster is a part of an electric booster assembly, one end of the pedal simulator is connected with a brake pedal, and the other end of the pedal simulator is connected with a master cylinder.
Further, the push rod 2 includes a first rod body 21 and a second rod body 22, the first rod body 21 is connected with the pedal, the second rod body 22 is connected with the brake master cylinder, the second rod body 22 is inserted into the flange plate 1 along the axial direction, and the first rod body 21 and the second rod body 22 are coaxially arranged in the main shell. In this embodiment, the first rod 21 is an input shaft, and a user can step on the pedal to drive the first rod 21 to slide toward the second rod 22 and push the second rod 22.
Further, the push rod 2 further comprises a riveting piece 23, the first rod body 21 and the second rod body 22 are riveted into a whole through the riveting piece 23, a ball head is arranged on the riveting piece 23, and one end of the first rod body 21 can pivot along the circumferential direction of the ball head. In this embodiment, the flange 1 is provided with the end cover structure 11 for limiting the rivet 23, and the rivet 23 is prevented from being disengaged from the flange 1, because the electric booster assembly and the pedal are not at the same height relative to the vehicle body, the direction of the thrust of the first rod 21 to the rivet 23 is not strictly consistent with the axial direction of the main cavity 101, but has a certain angle input, and the ball head can pivot one end of the first rod 21 within a certain angle range, so as to ensure that the thrust of the first rod 21 is axially transmitted along the main cavity 101.
Further, the damping piece 3 is fixed on the riveting piece 23, and the damping piece 3 is attached to the inner wall of the flange plate 1. In the present embodiment, the damping member 3 is damping rubber.
Further, the footboard simulator that electric booster used still includes push rod holder 4, push rod holder 4 is fixed in the ring flange 1, the second body of rod 22 is kept seat 4 by the push rod and is spacing in ring flange 1 along circumference, the push rod keeps between seat 4 and the ring flange 1 with the interference fit assembly, the second body of rod 22 keeps between the seat 4 with the push rod with clearance fit assembly, the push rod keeps seat 4 to avoid the second body of rod 22 to produce radial volume of rocking when the axial slip.
Further, the pedal simulator used by the electric booster further comprises a push rod frame 5, and the first rod body 21 is axially inserted into the push rod frame 5 and fixedly connected with the push rod frame 5 into a whole. In this embodiment, the push rod frame 5 and the first rod 21 are mounted by a nut (not shown), and the first rod 21 is provided with a hook 211 for limiting the push rod frame 5.
Further, the pedal simulator that electric booster used still includes spring 6, and spring 6's both ends offset with ring flange 1 and push rod frame 5 respectively, and spring 6 can produce spring 6 power and change into the footboard sense and transmit to the footboard to push rod frame 5 and push rod 2 when push rod 2 slides.
Further, the pedal simulator used by the electric booster further comprises a dust cover 7, the dust cover 7 is sleeved outside the spring 6, two ends of the dust cover 7 are respectively fixed on the push rod frame 5 and the flange plate 1, and when the spring 6 is compressed, a main body of the dust cover 7 is compressed together with the compression.
Referring to fig. 2, the main cavity 101 includes a first friction cavity 102 and a second friction cavity 103 adjacent to each other, the damping member 3 is disposed in the first friction cavity 102 and attached to an inner wall of the first friction cavity 102, an axial distance exists between the second friction cavity 103 and the damping member 3, and the second friction cavity 103 is a tapered surface gradually converging relative to the first friction cavity 102. In this embodiment, the first friction cavity 102 is in interference fit with the damping member 3, the distance between the second friction cavity 103 and the damping member 3 is 5mm, and the convergent inclination angle of the second friction cavity 103 relative to the conical surface of the first friction cavity 102 is 1 °, so that the friction force generated when the damping member 3 just starts to slide is unchanged, and the friction force gradually increases when the damping member slides to a position of 5mm, thereby generating a gradual damping feeling.
Referring to fig. 3, specifically, when the user steps on the pedal, the first rod 21 and the push rod frame 5 fixedly connected thereto are driven by the pedal, the first rod 21 further pushes the rivet 23 and the damping member 3 thereon, and the push rod frame 5 presses the spring 6. At this time, the pedal needs to overcome the spring force F generated by the spring 6sWhile also overcoming the friction force F generated between the damping member 3 and the first friction chamber 102fI.e. the pedal force F of the pedal at this timei＝Fs+FfThe pedal force is transmitted to the user through the pedal, giving the user an excellent pedal feel.
As the user continues to step on the pedal, the first rod 21 and the push rod frame 5 fixed thereto continue to move. When the damping member 3 moves 5mm from the first friction chamber 102 into the second friction chamber 103, the friction force FfWill increase compared to before, i.e. the friction force F when the damping member 3 moves in the first friction chamber 102fFor a fixed value, the friction force F is generated under the action of the conical surface contracting 1 degree when the damping part 3 moves in the second friction cavity 103fWill increase gradually with the increase of pedal stroke, and the pedal force is still transmitted to the user through the pedal at this moment, compare with the preceding pedal feel, give the user a gradual damping feel more.
When the user releases the pedal, the friction force between the damping member 3 and the second friction chamber 103 is opposite to the friction force between the damping member 3 and the second friction chamber 103 when the user steps on the pedal, and the pedal force F is generatedi’＝Fs-Ff. That is, when the pedal is depressed and released, the hysteresis force F is formed by the pedal force corresponding to the same pedal strokeΔHysteresis force FΔ＝Fi-Fi’＝2*FfAnd hysteresis force FΔCan follow the pedalThe stroke changes. Hysteresis force is still transmitted to the user through the footboard, and the process that the footboard return can be made softer, and the feel is more comfortable in the hysteresis of when loosening the footboard compared with the footboard sense and the damping sense when stepping on the footboard before.
In summary, the pedal simulator used by the electric booster of the present invention provides a user with a hierarchical pedal feeling through the damping member and the spring when the user steps on the pedal through the combination of the flange, the push rod, the spring and the damping member, provides a gradually increasing damping feeling through the damping member and the second friction chamber with the conical surface, can generate a hysteresis feeling different with the change of the pedal stroke when the user releases the pedal, and provides excellent use experience for the driver through the electric booster.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A pedal simulator that electronic booster used which characterized in that: the footboard simulator that electric booster used includes ring flange (1), push rod (2) and damping piece (3), the both ends of push rod (2) are connected with brake master cylinder and footboard respectively, push rod (2) with damping piece (3) are located by in main cavity body (101) that the inner wall of ring flange (1) encloses, push rod (2) can be in under the drive of footboard slide in main cavity body (101), the footboard simulator that electric booster used still includes push rod frame (5) and spring (6), the both ends of spring (6) respectively with ring flange (1) with push rod frame (5) offset, spring (6) can be right when push rod (2) slide push rod frame (5) with push rod (2) produce spring (6) power and turn into pedal sense and transmit to the footboard, push rod (2) can also be with the slip in-process damping piece (3) with ring flange (1) The friction force generated between the damping piece (3) and the second friction cavity (103) can be converted into the damping feeling and the hysteresis feeling through the push rod (2) and transmitted to the pedal, the main cavity (101) comprises a first friction cavity (102) and a second friction cavity (103) which are arranged adjacently, the damping piece (3) is arranged in the first friction cavity (102) and attached to the inner wall of the first friction cavity (102), an axial distance exists between the second friction cavity (103) and the damping piece (3), the second friction cavity (103) is a conical surface which is gradually contracted relative to the first friction cavity (102), and the friction force generated by friction between the damping piece (3) and the second friction cavity (103) can be transmitted to the pedal through the damping feeling and the hysteresis feeling which are generated through the push rod (2).
2. The pedal simulator for use with an electric booster according to claim 1, wherein: the push rod (2) comprises a first rod body (21) and a second rod body (22), the first rod body (21) is connected with the pedal, the second rod body (22) is connected with the brake master cylinder, the second rod body (22) is axially inserted into the flange plate (1), and the first rod body (21) and the second rod body (22) are coaxially arranged in the flange plate (1).
3. The pedal simulator for use in an electric booster according to claim 2, wherein: the pedal simulator used by the electric booster further comprises a push rod retaining seat (4), the push rod retaining seat (4) is fixed in the flange plate (1), and the second rod body (22) is limited in the flange plate (1) along the circumferential direction by the push rod retaining seat (4).
4. The pedal simulator for use in an electric booster according to claim 2, wherein: the push rod (2) further comprises a riveting piece (23), the first rod body (21) and the second rod body (22) are riveted into a whole through the riveting piece (23), a ball head is arranged on the riveting piece (23), and one end of the first rod body (21) can pivot along the circumferential direction of the ball head.
5. The pedal simulator for use with an electric booster according to claim 4, wherein: the damping piece (3) is fixed on the riveting piece (23), and the damping piece (3) is attached to the inner wall of the flange plate (1).
6. The pedal simulator for use in an electric booster according to claim 2, wherein: the first rod body (21) is axially inserted into the push rod frame (5) and fixedly connected with the push rod frame (5) into a whole.
7. The pedal simulator for use with an electric booster according to claim 6, wherein: the pedal simulator used by the electric booster further comprises a dust cover (7), the dust cover (7) is sleeved outside the spring (6), and two ends of the dust cover (7) are respectively fixed on the push rod frame (5) and the flange plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011280922.4A CN112389390B (en) | 2020-11-16 | 2020-11-16 | Pedal simulator used for electric booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011280922.4A CN112389390B (en) | 2020-11-16 | 2020-11-16 | Pedal simulator used for electric booster |
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| Publication Number | Publication Date |
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| CN112389390A CN112389390A (en) | 2021-02-23 |
| CN112389390B true CN112389390B (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011280922.4A Active CN112389390B (en) | 2020-11-16 | 2020-11-16 | Pedal simulator used for electric booster |
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| Country | Link |
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| CN (1) | CN112389390B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5551764A (en) * | 1992-11-24 | 1996-09-03 | Itt Automotive Europe Gmbh | Brake system for automotive vehicles with electric drive |
| CN101229807A (en) * | 2007-01-25 | 2008-07-30 | 丰田自动车株式会社 | Devices for creating brake pedal resistance |
| CN201712594U (en) * | 2010-06-29 | 2011-01-19 | 浙江亚太机电股份有限公司 | Automobile brake pedal sense simulator |
| DE102011016240A1 (en) * | 2011-04-06 | 2012-10-11 | Volkswagen Ag | Pedal force simulator for controlling brake force in vehicle braking system, has piston rod that is slide mounted by slide bearing of radial-spherical bearing in front wall of cylinders |
| CN110389043A (en) * | 2019-08-20 | 2019-10-29 | 上海拿森汽车电子有限公司 | A kind of pedal simulator |
| CN111688654A (en) * | 2020-05-15 | 2020-09-22 | 上海擎度汽车科技有限公司 | Force simulator with force stagnation effect |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101039830A (en) * | 2004-10-15 | 2007-09-19 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Brake system for motor vehicles |
| DE102017104278A1 (en) * | 2017-03-01 | 2018-09-06 | HELLA GmbH & Co. KGaA | Pedalemulator for a motor vehicle |
| EP3560780B1 (en) * | 2018-04-26 | 2021-10-20 | Mando Corporation | Electronic brake system and method for operating the same |
| CN110329227B (en) * | 2019-08-09 | 2024-02-09 | 上海拿森汽车电子有限公司 | Pedal simulator, electric booster and vehicle |
| CN110667545B (en) * | 2019-11-16 | 2021-03-19 | 吉林大学 | A brake pedal force simulation device |
-
2020
- 2020-11-16 CN CN202011280922.4A patent/CN112389390B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5551764A (en) * | 1992-11-24 | 1996-09-03 | Itt Automotive Europe Gmbh | Brake system for automotive vehicles with electric drive |
| CN101229807A (en) * | 2007-01-25 | 2008-07-30 | 丰田自动车株式会社 | Devices for creating brake pedal resistance |
| CN201712594U (en) * | 2010-06-29 | 2011-01-19 | 浙江亚太机电股份有限公司 | Automobile brake pedal sense simulator |
| DE102011016240A1 (en) * | 2011-04-06 | 2012-10-11 | Volkswagen Ag | Pedal force simulator for controlling brake force in vehicle braking system, has piston rod that is slide mounted by slide bearing of radial-spherical bearing in front wall of cylinders |
| CN110389043A (en) * | 2019-08-20 | 2019-10-29 | 上海拿森汽车电子有限公司 | A kind of pedal simulator |
| CN111688654A (en) * | 2020-05-15 | 2020-09-22 | 上海擎度汽车科技有限公司 | Force simulator with force stagnation effect |
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| CN112389390A (en) | 2021-02-23 |
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