CN211308523U - Brake booster with automatic emergency braking even in the event of a blockage - Google Patents
Brake booster with automatic emergency braking even in the event of a blockage Download PDFInfo
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- CN211308523U CN211308523U CN201922434996.8U CN201922434996U CN211308523U CN 211308523 U CN211308523 U CN 211308523U CN 201922434996 U CN201922434996 U CN 201922434996U CN 211308523 U CN211308523 U CN 211308523U
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Abstract
For solving the technical problem that there is the potential safety hazard in the present brake booster that has retardant recognition function, the utility model provides a still can automatic emergency braking's brake booster under the retardant condition. The utility model arranges the pedal force transmission rod and the pedal force transmission plate in the pedal force transmission unit in an axial split way, under the automatic emergency braking mode, when foreign matters or the feet of a driver extend into the bottom of the vehicle brake pedal, the movement of the pedal force transmission rod is blocked, so that the pedal force transmission plate is separated from the pedal force transmission rod, and the situation that the feet of the driver are clamped and damaged due to the continuous translation of the pedal force transmission rod or the damage of the brake system component due to the firm foreign matters is avoided; meanwhile, during automatic emergency braking, the pedal force transmission plate can still translate under the action of the electric power, so that the electric power transmission unit cannot be blocked from transmitting the electric power to implement braking operation, and potential safety hazards of the conventional brake booster with the blocking identification function are avoided.
Description
Technical Field
The utility model relates to a brake booster that still can automatic emergency braking under the retardant condition.
Background
A conventional vehicle brake booster includes a housing, a pedal force input unit, an electric power generating unit, a supporting and guiding unit, a returning unit, a pedal force transmitting unit, an electric power transmitting unit, and a braking force output unit; a pedal force input unit for receiving a pedal force from a driver; an electromotive force generating unit for generating electromotive force; the supporting and guiding unit is used for supporting the pedal force transmission unit and the electric power transmission unit in the shell and ensuring that the pedal force transmission unit and the electric power transmission unit can only move along the axial direction; the resetting unit is used for resetting the pedal force transmission unit and the electric power transmission unit; the pedal force transmission unit is used for transmitting the pedal force to the braking force output unit; the electric power transmission unit is used for transmitting electric power to the braking force output unit; the braking force output unit is used for loading the pedal force output by the pedal force input unit and/or the electric power output by the electric power generation unit on the master cylinder.
At present, on the basis of the above conventional vehicle brake booster, a brake booster with a blocking recognition function is designed, and the principle is that when the brake pedal is blocked by a foreign object or the driver's foot accidentally protrudes into the bottom of the brake pedal and is clamped in the automatic emergency braking mode, the control part of the electromotive force generating unit recognizes that the brake pedal is blocked, so as to stop generating the electromotive force continuously to stop braking, thereby achieving the purpose of preventing the brake system components from being damaged by the firm foreign object and preventing the driver's foot from being hurt by the clip, for example, the brake booster disclosed in patent documents with publication numbers CN 109131270 a and CN 107949507 a.
However, the above brake booster carries a risk that when the mechanism recognizes that the brake pedal is blocked, the continuation of braking will be stopped, which at the time of crisis will result in the vehicle hitting an obstacle ahead, and even in the injury or death of the vehicle occupant or pedestrian.
In addition, when the conventional brake booster is reset, the pedal force transmission unit and the electric power transmission unit are reset simultaneously, when a motor of the electric power generation unit breaks down, a driver can only manually tread a brake pedal to brake, and at the moment, large force is needed, so that the burden of the driver is increased.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that the current brake booster with the retardant recognition function has potential safety hazard, the utility model provides a brake booster that still can automatic emergency braking under the retardant condition.
The technical scheme of the utility model is that:
a brake booster which can still automatically brake in emergency under the condition of retardation comprises
The brake system comprises a shell, a pedal force input unit, an electric power generating unit, a supporting and guiding unit, a resetting unit, a pedal force transmission unit, an electric power transmission unit and a braking force output unit;
the supporting and guiding unit comprises a bracket assembly and a guide rail assembly;
the pedal force transmission unit comprises a pedal force transmission rod and a pedal force transmission plate;
it is characterized in that:
the pedal force transmission rod is axially clamped with the pedal force transmission plate; only when the automatic emergency brake is carried out, the pedal force transmission rod and the pedal force transmission plate can be separated at the clamping part under the external force resistance;
alternatively, the first and second electrodes may be,
the pedal force transmission rod and the pedal force transmission plate are axially arranged in sequence and are only contacted and not connected;
the bracket component is provided with a guide hole;
and an anti-rotation triggering column is arranged on the pedal force transmission plate and penetrates through the guide hole.
Further, the bracket assembly comprises a pedal force bracket, a pedal force guide element, an electric power bracket and an electric power guide element; the guide rail assembly comprises a guide rail which is an inner and/or outer guide structure; the pedal force bracket comprises a pedal push rod and at least one pedal force bracket arm connected with the pedal push rod; the pedal force guide element is arranged at the end part of the pedal force bracket arm; the electric power support comprises an electric push rod and at least one electric power support arm connected with the electric push rod; the electrodynamic force guide element is arranged at the end part of the electrodynamic force bracket arm; the pedal push rod and the electric push rod are both of tubular structures with openings at two ends, the pedal push rod is arranged in the electric push rod, and the pedal push rod and the electric push rod are in clearance fit and can move relatively along the axial direction; the pedal force bracket arm is in sliding connection with the guide rail through a pedal force guide element; the electric power support arm is connected with the guide rail in a sliding way through an electric power guide element; the pedal force transmission rod is arranged in the pedal push rod; a first guide hole is formed in the pedal force support arm, a second guide hole is formed in the electric power support arm, and the anti-rotation triggering column on the pedal force transmission plate sequentially penetrates through the first guide hole and the second guide hole.
Further, the reset unit comprises a bracket reset spring; the support reset spring is arranged on the guide rail.
Further, the guide rail is a guide pillar with a concave, C-shaped or omega-shaped section; the pedal force guide element is matched with the outer wall of the guide rail to realize external guide; the electric force guiding element is matched with the inner wall of the guide rail to realize internal guiding; the reset unit comprises an electrodynamic force support reset spring, one end of the electrodynamic force support reset spring is in contact with or connected with a shell of the brake booster, and the other end of the electrodynamic force support reset spring is in contact with or connected with an electrodynamic force guide element.
Alternatively, the first and second electrodes may be,
the bracket assembly comprises a pedal force bracket, a pedal force guide element, an electric power bracket and an electric power guide element; the guide rail assembly comprises a pedal force guide rail and an electric power guide rail, and the pedal force guide rail and the electric power guide rail are of inner and/or outer guide structures; the pedal force bracket comprises a pedal push rod and at least one pedal force bracket arm connected with the pedal push rod; the pedal force guide element is arranged at the end part of the pedal force bracket arm; the electric power support comprises an electric push rod and at least one electric power support arm connected with the electric push rod; the electrodynamic force guide element is arranged at the end part of the electrodynamic force bracket arm; the pedal push rod and the electric push rod are both of tubular structures with openings at two ends, the pedal push rod is arranged in the electric push rod, and the pedal push rod and the electric push rod are in clearance fit and can move relatively along the axial direction; the pedal force bracket arm is connected with the pedal force guide rail in a sliding way through a pedal force guide element; the electric power support arm is connected with the electric power guide rail in a sliding mode through an electric power guide element; the pedal force transmission rod is arranged in the pedal push rod; a first guide hole is formed in the pedal force support arm, a second guide hole is formed in the electric power support arm, and the anti-rotation triggering column on the pedal force transmission plate sequentially penetrates through the first guide hole and the second guide hole.
Further, the electric power guide rail is a guide pillar with a concave, C-shaped or omega-shaped section; the electric force guiding element is matched with the inner surface of the electric force guide rail to realize internal guiding; the reset unit comprises an electric power support reset spring; the electric power support return spring is arranged in the electric power guide rail, one end of the electric power support return spring is in contact with or connected with the shell of the brake booster, and the other end of the electric power support return spring is in contact with or connected with the electric power guide element.
Furthermore, the electric power guide rail and the pedal force guide rail are guide pillars with concave, C-shaped or omega-shaped sections; the electric power guide element and the pedal force guide element are matched with the inner surface of the electric power guide rail to realize inner guide; the reset unit comprises an electric power support reset spring and a pedal force support reset spring; the electric power support return spring is arranged in the electric power guide rail, one end of the electric power support return spring is in contact with or connected with the shell of the brake booster, and the other end of the electric power support return spring is in contact with or connected with the electric power guide element; the pedal force support reset spring is arranged in the pedal force guide rail, one end of the pedal force support reset spring is in contact with or connected with the shell of the brake booster, and the other end of the pedal force support reset spring is in contact with or connected with the pedal force guide element.
Further, when the pedal force transmission rod is only contacted with but not connected with the pedal force transmission plate, the pedal force transmission rod and the pedal force transmission plate are in plane fit, conical fit, concave-convex fit or blind hole nested fit.
Further, it is characterized in that: when the pedal force transmission rod is clamped with the pedal force transmission plate, the pedal force transmission rod and the pedal force transmission plate are clamped in a spherical or columnar manner.
Furthermore, a plurality of cantilever structures are formed on the end part of the pedal force transmission rod along the axial grooving, a circumferential groove/circumferential protrusion is arranged on each cantilever structure, and correspondingly, a circumferential protrusion/circumferential groove matched with the circumferential groove/circumferential protrusion to realize axial clamping is arranged in the central blind hole at one end of the pedal force transmission plate.
Compared with the prior art, the utility model has the advantages that:
1. the utility model discloses with the axial components of a whole that can function independently setting of footboard power transmission pole and footboard power transmission board in the footboard power transmission unit, under automatic emergency braking mode, when there is the foreign matter or driver's foot stretches into vehicle brake pedal bottom, the motion of footboard power transmission pole is obstructed, thereby makes footboard power transmission board and footboard power transmission pole throw off, avoids the footboard power transmission pole to continue the translation and lead to the driver's foot to be pressed from both sides and hinder, or the condition emergence that leads to braking system part damaged because of firm foreign matter; meanwhile, in the automatic emergency braking mode, the pedal force transmission plate can still translate under the action of the electric power, so that the electric power transmission unit cannot be prevented from transmitting the electric power to the braking force output unit, the braking operation is implemented, and the potential safety hazard is avoided.
2. When the pedal force transmission rod is clamped with the pedal force transmission plate, no idle stroke exists between the pedal force transmission rod and the pedal force transmission plate, and the brake pedal feels better when a driver treads the brake pedal during normal braking.
3. When the pedal force transmission rod is clamped with the pedal force transmission plate, no idle stroke exists between the pedal force transmission rod and the pedal force transmission plate, the automatic emergency braking operation can be quickly interrupted by a driver during automatic emergency braking, and the national requirement that a passenger car Automatic Emergency Braking System (AEBS) has driver intervention performance is met.
4. The utility model discloses a traditional brake booster can be applied to retardant recognition principle, makes very little change on current vehicle helping hand stopper basis and can realize preventing pressing from both sides the foot and prevent that the foreign matter is retardant to lead to the local impaired purpose of auxiliary brake system, still can implement the braking when retardant simultaneously, improves with low costs.
5. The utility model discloses a support and direction unit includes the footboard power support, the footboard power guide rail, electric power support and electric power guide rail, no matter set up footboard power support reset spring and electric power support reset spring respectively in footboard power guide rail and electric power guide rail, still only set up the electric power support reset spring who is used for restoring to the throne the electric power support in the electric power guide rail, produce the trouble when the electric power unit, the scheme that resets in the middle of the single relatively traditional support, when the driver needs manual braking, need not to overcome electric power support reset spring's resistance, consequently, the footboard power that need pay out is less, can alleviate driver's burden.
6. When the utility model discloses well footboard power transmission pole and footboard power transmission board produce the back of breaking away because of the retardation force during automatic emergency braking, can disappear the back at the retardation force, through the artifical mode of applying the footboard power, the joint once more is easily realized, need not maintenance or influence reuse.
Drawings
Fig. 1 is a schematic diagram of the present invention in cooperation with a vehicle master cylinder (the electromotive force generating unit is not shown).
FIG. 2 is a first perspective view of the first embodiment of the present invention (after removing the upper cover)
Fig. 3 is a second perspective view (after the upper cover and the bottom case are removed) of the first embodiment of the present invention.
Fig. 4 is a three-dimensional view (another view angle) of the first embodiment of the present invention.
Fig. 5 is a schematic view illustrating the cooperation of the pedal force support, the electromotive force support, and the pedal force transmission plate according to the first embodiment of the present invention.
Fig. 6 is an exploded view of fig. 5.
Fig. 7 is a schematic view illustrating the cooperation between the transmission gear nut and the electric push rod according to an embodiment of the present invention.
Fig. 8 is an exploded view of fig. 7.
Fig. 9 is a schematic diagram of the cooperation between the electromotive force generating unit and the electromotive force transmitting unit according to the first embodiment of the present invention.
Fig. 10 is a schematic structural diagram of an electric power support arm according to a first embodiment of the present invention.
Fig. 11 is a schematic structural view of a pedal force transmission plate according to a first embodiment of the present invention.
Fig. 12 is a schematic view of a power-assisted pushing element and a connector according to an embodiment of the present invention.
Fig. 13 is a schematic view of a middle housing and a bottom case of a first embodiment of the present invention after being engaged.
Fig. 14 is an exploded view of a first embodiment of the present invention.
Fig. 15 is a schematic view of a state that a clamping leg is to be separated according to an embodiment of the present invention.
Fig. 16 is a schematic view illustrating a state where the clamping legs are separated according to an embodiment of the present invention.
Fig. 17 is a schematic view of a mechanism in a rest state according to an embodiment of the present invention.
Fig. 18 is a schematic view of a mechanism braking state according to an embodiment of the present invention.
Fig. 19 is a schematic diagram of the second embodiment of the present invention in cooperation with a vehicle master cylinder (the electromotive force generating unit is not shown).
Fig. 20 is a schematic diagram of the third embodiment of the present invention cooperating with a vehicle master cylinder (the electromotive force generating unit is not shown).
Fig. 21 is a schematic diagram of the fourth embodiment of the present invention in cooperation with a vehicle master cylinder (the electromotive force generating unit is not shown).
Fig. 22 is a schematic diagram of the fifth embodiment of the present invention cooperating with a vehicle master cylinder (the electromotive force generating unit is not shown).
Description of reference numerals:
1-pedal force input lever, 2-motor output gear, 3-intermediate gear set, 4-driving gear box, 41-screw box, 42-transmission gear, 5-electric push rod, 51-external thread, 6-pedal push rod, 7-pedal force transmission lever, 74-circumferential groove, 75-cantilever structure, 8-pedal force transmission plate, 81-circumferential protrusion, 82-central blind hole, 10-anti-rotation trigger column, 101-first carrier, 102-second carrier, 11-pedal force return spring, 12-electric power bracket, 120-electric power bracket arm, 121-second guide hole, 122-elastic attachment, 13-pedal force bracket, 130-pedal force bracket arm, 131-first guide hole, 14-electric power guide element, 15-pedal force guide element, 17-power-assisted push element, 171-through hole, 172-buckle, 173-guide structure, 18-second elastic element, 19-braking force output element A, 20-braking force output element B, 21-bearing bush, 22-flange steel plate, 23-bottom shell, 24-bearing, 25-booster fixing bolt, 26-middle shell, 261-bolt fixing hole, 262-guide rail, 27-upper cover, 28-brake master pump, 29-master pump fixing bolt, 31-motor, 33-electric power support reset spring, 35-first elastic element, 36-induction magnet, 37-connector, 38-Hall sensor and 39-sensor fixing frame.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The first embodiment is as follows:
the embodiment of the utility model provides a vehicle brake booster, including casing, footboard power input unit, footboard power transmission unit, support and guide unit, electric power transmission unit, electric power production unit, reset unit and braking force output unit.
As shown in fig. 1 to 4, the housing includes an upper cover 27, a middle housing 26 and a bottom shell 23 connected in sequence; a through hole for the columnar input end of the master cylinder 28 to pass through is formed in the middle of the upper cover 27, and four bolt fixing holes 261 are formed in the inner side wall of the middle shell 26 (the bolt fixing holes 261 not only play a connecting role, but also can bear acting force); the brake master cylinder 28 is fixed on the intermediate housing 26 together with the upper cover 27 by the fitting and fastening of the master cylinder fixing bolt 29 and the bolt fixing hole 261; the bottom shell 23 is fixedly mounted on the vehicle through a booster fixing bolt 25; a connector 37 is also arranged in the bottom shell 23; a steel plate 22 is mounted on the bottom outside of the bottom case 23.
As shown in fig. 1, the pedal force input unit includes a pedal force input rod 1, and one end of the pedal force input rod 1 is connected to a brake pedal of the vehicle and the other end is connected to the pedal force transmission unit.
As shown in fig. 1, 6, 8, 9, the pedal force transmission unit includes a pedal force transmission rod 7 and a pedal force transmission plate 8; two end faces of the pedal force transfer plate 8 are respectively provided with a central blind hole, and the edge of the pedal force transfer plate 8 is provided with an anti-rotation triggering column 10; one end of the pedal force transmission rod 7 is connected with the output end of the pedal force input rod 1, and the other end of the pedal force transmission rod 7 is clamped with the pedal force transmission plate 8; the pedal force transmission rod 7 and the pedal force transmission plate 8 can be clamped in a spherical manner (namely a spherical clamping head and a claw-shaped clamping groove manner) or a columnar manner; in order to realize axial positioning during clamping, a columnar clamping mode is preferably adopted between the pedal force transmission rod 7 and the pedal force transmission plate 8, as shown in fig. 11, a plurality of cantilever structures 75 are formed on the end portion of the pedal force transmission rod 7 along an axial cutting groove, a circumferential groove 74 is formed on each cantilever structure 75, and correspondingly, a circumferential protrusion 81 which is matched with the circumferential groove 74 to realize axial clamping is arranged in a central blind hole 82 at one end of the pedal force transmission plate 8; of course, it is also possible to provide a circumferential projection on the cantilever structure 75 and a circumferential recess in the central blind hole 82. Furthermore, only during automatic emergency braking, the pedal force transmission rod 7 and the pedal force transmission plate 8 can be disengaged at the engagement point due to external force retardation.
As shown in fig. 1, a first elastic element 35 is embedded in another central blind hole of the pedal force transmission plate 8, the first elastic element 35 may be made of elastic rubber, or other elastic elements, such as a spring, a disc spring, etc., may be used; in the rest state, the first spring element 35 has an axial free travel with respect to the input of the brake force output unit.
The supporting and guiding unit comprises a bracket assembly, a guide rail assembly and a bearing assembly;
as shown in fig. 3, 5-10, the bracket assembly in this embodiment includes a pedal force bracket 13, a pedal force guide member 15, an electromotive force bracket 12, and an electromotive force guide member 14; the guide rail assembly includes two guide rails 262 parallel to each other and having a C-shaped cross section; the pedal force bracket 13 comprises a pedal push rod 6 and two pedal force bracket arms 130 connected with the pedal push rod 6; the pedal force guide member 15 is provided at the end of the pedal force bracket arm 130; the electric power bracket 12 comprises an electric push rod 5 and two electric power bracket arms 120 connected with the electric push rod 5; the electrodynamic guide element 14 is arranged at the end of the electrodynamic carrier arm 120; the pedal push rod 6 and the electric push rod 5 are both of a cylindrical structure with openings at two ends, the pedal push rod 6 is embedded in the electric push rod 5, the pedal push rod and the electric push rod can slide relatively, and the pedal force bracket arm 130 is closer to the braking force output unit relative to the electric power bracket arm 120; the pedal force bracket arm 130 is connected with the guide rail 262 in a sliding way through the pedal force guide element 15, and the pedal force guide element 15 is matched with the outer wall of the guide rail 262 to realize external guide; the electrodynamic support arm 120 is connected with the guide rail 262 in a sliding way through the electrodynamic guide element 14, and the electrodynamic guide element 14 is matched with the inner wall of the guide rail 262 to realize inner guide; the pedal force transmission rod 7 is positioned in the pedal push rod 6; the pedal force support arm 130 is provided with a first guide hole 131, the electric power support arm 120 is provided with a second guide hole 121 at a corresponding position, and the anti-rotation triggering column 10 on the pedal force transfer plate 8 sequentially penetrates through the first guide hole 131 and the second guide hole 121.
As shown in fig. 10 and 11, the electric power bracket arm 120 is further provided with an elastic attachment 122 in a cantilever structure at the connection with the pedal force transmission plate 8; a first carrier 101 and a second carrier 102 are arranged on the side wall of the anti-rotation triggering column 10, and the axial length of the first carrier 101 is greater than that of the second carrier 102; the first carrier 101 is positioned in correspondence with the elastic appendage 122 for pressing the elastic appendage 122 in deformation when the brake pedal is blocked; the second carrier 102 is used to establish contact with the stop surfaces of the electrical power bracket 12 to prevent excessive deformation of the resilient appendage 122.
In other embodiments, the electromotive force bracket 12 and the pedal force bracket 13 may not share a common guide rail, but each has a respective guide rail, that is, the guide rail assembly includes an electromotive force guide rail and a pedal force guide rail, and the electromotive force guide rail and the pedal force guide rail may be an outer guide structure, an inner guide structure, or an inner guide structure and an outer guide structure (for example, the electromotive force guide rail and the pedal force guide rail may be both guide pillars having a concave, C-shaped, or Ω -shaped cross section); considering that the driver can only brake manually when the electric power generating unit is out of order, in order to make the driver more labor-saving, the electric power bracket return spring may be installed only in the groove of the electric power rail. Of course, the pedal force support reset spring can be arranged in the concave groove of the pedal force guide rail, and compared with the existing scheme of middle reset of a single support, the aim of saving labor can be still achieved.
In other embodiments, the electric power guide rail and the pedal force guide rail can also be a solid guide post, a dovetail guide post, and the like.
In other embodiments, when the pedal force support 13 and the electric power support 12 share the same or the same set of guide rails, and the guide rails use guide pillars with concave, C-shaped or Ω -shaped cross sections, both the pedal force guide element 15 and the electric power guide element 14 can be internally guided by cooperating with the inner wall of the guide rails, and a support return spring is provided in the guide rails for simultaneously returning the pedal force support and the electric power support.
In other embodiments, if the return force of the piston return spring of the master cylinder 28 is large enough to satisfy the return of the pedal force bracket 13 and the electric power bracket 12, it is not necessary to install the return spring in the pedal force rail and the electric power rail.
As shown in fig. 1, the bearing assembly includes a bearing 24 and a bearing bush 21 provided on a bottom case 23 for supporting the gear box 4.
As shown in fig. 1 and 9, the electric power transmission unit includes a driving gear nut 4, an external thread 51 arranged on the outer wall of the electric push rod 5 of the electric power bracket 12, a power-assisted pushing member 17 and a second elastic element 18; the transmission gear nut 4 comprises a nut 41 with internal threads and a transmission gear 42 which is sleeved outside the nut 41 and fixedly connected with the nut; the external thread 51 may be directly machined on the electric push rod 5, or may be a threaded sleeve with an external thread, which is arranged outside the electric push rod 5 and is fixedly connected with the electric push rod as a whole.
The female 4 settings of driving gear are outside electric putter 5, and the transmission of two screw-thread fit: the female 4 of driving tooth is clockwise or anticlockwise the time of rotating, converts screw-thread fit's rotary motion into electric putter 5 along axial translation motion, and the female 4 of driving tooth is spacing because of being supported by bearing 24, can only rotate and can not follow axial translation.
The boosting push piece 17 is arranged between the pedal force bracket 13 and the braking force output unit; as shown in fig. 1 and 12, the boosting push member 17 is bowl-shaped as a whole, and one end thereof is connected to the pedal force bracket arm 130 of the pedal force bracket 13, and the other end thereof is in contact with the braking force output unit; the top of the power-assisted pushing piece 17 is provided with a through hole 171, the position of the through hole 171 is matched with the position of the first elastic element 35, and the size of the through hole 171 is larger than that of the first element 35, so that the first elastic element 35 can penetrate through the through hole 171 under the action of pedal force and transmit the pedal force to the braking force output unit; the second elastic element 18 is arranged between the pedal force bracket 13 and the electric power bracket 12; the second elastic element 18 may be made of elastic rubber, and other elastic elements such as a spring, a disc spring, etc. may be used. The electric power is transmitted to the braking force output unit through the transmission gear 42, the nut 41, the external thread 51, the second elastic element 18, the pedal force bracket 13 and the power-assisted push piece 17 in sequence.
As shown in fig. 12, the boosting push-piece 17 is further provided with a plurality of guide structures 173 (four in this embodiment) having sector-shaped cross sections (in other embodiments, they may also be cylindrical), and the shape enclosed by the outer walls of the plurality of guide structures 173 having sector-shaped cross sections matches the shape of the outer side wall of the pedal force transmission plate 8, so that the pedal force transmission plate 8 can perform an axial rotation-proof motion along the plurality of guide structures 173 having sector-shaped cross sections of the boosting push-piece 17.
The sensor fixing frame 39 is arranged on the side of the power-assisted pushing piece 17, and four buckles 172 are symmetrically arranged on the top edge of the power-assisted pushing piece 17 so as to connect the power-assisted pushing piece 17 with the pedal force support 13.
As shown in fig. 1, 2, and 5, the returning unit in the present embodiment includes a pedal force return spring 11 and an electric power bracket return spring 33 for returning the electric power bracket 12; the electromotive force bracket return spring 33 is disposed in the C-shaped groove of the guide rail 262 with one end contacting the upper cover 27 and the other end contacting the electromotive force guide member 14, thereby serving only for the return of the electromotive force bracket 12, in which the driver is labor-saving in manual braking when the electromotive force generating unit malfunctions; the pedal force return spring 11 is provided between the pedal force transmission plate 8 and the assist pusher 17.
As shown in fig. 9, 12, the electromotive force generating unit includes a sensor assembly, a control unit (having an interface for receiving a brake signal), a motor 31, and a transmission; the sensor component is used for monitoring the relative displacement generated between the pedal force transmission plate 8 and the pedal force bracket 13 and/or the electric power bracket 12 and transmitting the relative displacement to the control unit; the control unit controls the motor 31 to operate according to the displacement amount, and the electric power generated by the motor 31 is output to the gear box 4 through the transmission. The sensor component can be an optical coupling sensor, a resistance type displacement sensor or an electromagnetic Hall sensor; in the present embodiment, the sensor assembly is an electromagnetic hall sensor, and includes an induction magnet 36 and a hall sensor 38; the induction magnet 36 is arranged on the pedal force transmission plate 8, the Hall sensor 38 is arranged on the boosting push piece 17, and the positions of the induction magnet 36 and the Hall sensor correspond to each other; the transmission includes a motor output gear 2 and an intermediate gear set 3.
As shown in fig. 1, the braking force output unit includes a braking force output element a19 and a braking force output element B20 axially connected; the braking force output element a19 and the braking force output element B20 may be an integral piece or may be separate pieces.
The auxiliary braking principle and process of the embodiment are described below with reference to fig. 1, 17 and 18:
during braking, a driver applies pedal force to the pedal force input rod 1 to enable the pedal force input rod 1 to translate along the braking direction, so that the pedal force transmission rod 7, the pedal force transmission plate 8 and the first elastic element 35 are pushed to move together along the braking direction, and as the pedal force increases, the first elastic element 35 contacts the bottom of the braking force output element A19 and is compressed, and meanwhile, the pedal force is transmitted to the braking force output element A19 through the first elastic element 35;
accordingly, the pedal force transmission plate 8 translates to generate a relative displacement between the sensing magnet 36 and the hall sensor 38, the hall sensor 38 detects the relative displacement, and transmits a displacement signal to a control unit (usually ECU) in the electromotive force generation unit, the control unit controls the motor 31 to start after receiving the displacement signal, and rotates forward/backward along with the advancing/retreating of the pedal force input rod 1, and the motor 31 operates to drive the motor output gear 2 to rotate, thereby driving the intermediate gear set 3 to rotate, further the intermediate gear set 3 drives the transmission gear nut 4 to rotate, so that the electric push rod 5 translates axially along the thread, the electric push rod 5 moves to drive the second elastic element 18, the pedal force support 13 and the power-assisted push member 17 to translate together, and finally, the pedal force and the electromotive force are transmitted to the braking force output element a19 through the power-assisted push member 17, the braking force output element A19 and the braking force output element B20 are pushed to move forwards, and then the piston in the master cylinder 28 is pushed to move forwards, so that the braking action is carried out;
when the relative displacement between the induction magnet 36 and the hall sensor 38 fixed on the boosting push piece 17 is kept unchanged, the ECU controls the motor 31 to stop running, and the torque in the original braking state is kept;
in the process of keeping braking, the motor 31 is in a torque keeping state, so that the motor output gear 2 is locked to achieve the braking state required by the pedal;
when braking is abandoned, the pedal force input rod 1 loses pedal force from the outside, the pedal force return spring 11 drives the pedal force transmission plate 8, the pedal force transmission rod 7 and the pedal force input rod 1 to return in sequence, and the master cylinder 28 also returns accordingly. The resetting of the pedal force transmission plate 8 causes the relative displacement between the induction magnet 36 and the hall sensor 38, the hall sensor 38 detects the relative displacement and transmits a displacement signal to a control unit (usually ECU) in the electromotive force generation unit, and the control unit controls the motor 31 to rotate reversely after receiving the displacement signal, so that the electric push rod 5, the electromotive force bracket 12 and the pedal force bracket 13 are reset.
The foot clamping prevention principle and process of the embodiment are described in the following with reference to fig. 15 and 16:
when braking is applied by means of the automatic emergency braking mode, the electric power carriage 12 is driven in translation by the electric push rod 5, which results in:
when the control unit receives a braking signal requiring braking, the control unit controls the motor 31 to be activated, when the brake pedal is not blocked (for example when not clamping the foot), the force in the direction opposite to the braking direction is small because the only element exerting a force in the direction opposite to the braking force is the pedal force return spring 11, and therefore the force in the direction opposite to the braking force is not sufficient to deform the elastic attachment 122 on the electric power bracket arm 120 or to change the spacing between the second carrier 102 on the pedal force transmission plate 8 and the upper surface of the electric power bracket 12 within a sufficient range. That is, the spacing between the pedal force transfer plate 8 and the electric power bracket 12 is also always above the threshold spacing that defines the occurrence of a brake pedal stuck event; when the distance between the pedal force transmission plate 8 and the electric power bracket 12 is less than or equal to the threshold distance, it is sensed by the control unit of the electric power generation unit that the brake pedal stuck event has occurred.
The utility model discloses under the normal braking condition, footboard power transmission pole 7 and 8 joints of footboard power transmission board do not have the idle stroke between footboard power transmission pole 7 and the footboard power transmission board 8, and the driver is when trampling brake pedal, and brake pedal impression is better. In addition, since the pedal force transmission lever 7 and the pedal force transmission plate 8 are connected together, it is possible to quickly respond to the driver's interruption of the operation of the automatic emergency braking during the automatic emergency braking.
During automatic emergency braking, when a brake pedal is blocked by an obstacle, when an active radar of a vehicle detects that a front obstacle is within a braking threshold, a braking signal is sent to a control unit (the control unit is provided with an interface for receiving the braking signal) in an electric force generation unit, the control unit drives a motor 31 to operate to generate electric force after receiving the braking signal, at the moment, the movement of a pedal force input rod 1, a pedal force transmission rod 7, a pedal force transmission plate 8 and an anti-rotation triggering column 10 fixed on the pedal force transmission plate 8 is limited due to the obstacle, and at the moment, besides the force applied by a pedal force return spring 11, the obstacle applies a force opposite to the braking direction to the pedal force input rod 1, which results in that: the circumferential groove 74 on the pedal force transmission rod 7 is disengaged from the circumferential protrusion 81 of the pedal force transmission plate 8, so that the pedal force transmission rod 7 is separated from the pedal force transmission plate 8, the pedal force transmission rod 7 stops moving continuously along the braking force direction, the brake pedal is loosened, the aim of preventing the foot of a driver from being injured by clamping is achieved, the pedal force transmission plate 8 can still translate continuously under the action of the electric power, and the electric power transmission unit cannot be prevented from transmitting the electric power to the braking force output unit to implement braking action.
At the same time, the pedal force transmission plate 8 and the rotation-prevention triggering column 10 press the elastic attachment 122 on the electrodynamic support arm 120 to deform it by means of the first carrier 101, whereby the distance between the second carrier 102 and the upper surface of the electrodynamic support 12 is reduced to less than or equal to the threshold distance of the retardation event, the hall sensor 38 recognizes this relative displacement, and the control unit records the fault code of the retardation event, providing an information source for accident tracing.
Example two:
as shown in fig. 19, the present embodiment is different from the first embodiment only in that: the pedal force transmission rod 7 is in only axial contact with, but not connected to, the pedal force transmission plate 8.
The working principle of the embodiment is the same as that of the first embodiment.
Example three:
as shown in fig. 20, the present embodiment differs from the first embodiment only in that: the bracket return spring is provided in the middle, and simultaneously, the pedal force bracket 13 and the electromotive force bracket 12 are returned.
Example four:
as shown in fig. 21, the present embodiment is different from the first embodiment only in that: be provided with spacing arch on the footboard power input rod 1, footboard power reset spring 11 sets up between the spacing arch of footboard power input rod 1 and footboard push rod 6, and the one end of footboard power reset spring 11 contacts with the spacing arch on the footboard power input rod 1, and the other end of footboard power reset spring 11 contacts with footboard push rod 6, and footboard power reset spring 11 mainly used promotes footboard power input rod 1 and the reset of footboard power transmission pole 7.
Example five:
as shown in fig. 22, the present embodiment is different from the first embodiment only in that: the second elastic element 18 is arranged between the booster 17 and the braking force output element a19, and in the mechanism static state, only an axial micro-force stroke is provided between the first elastic element 35 and the second elastic element 18, and no axial idle stroke is provided.
Claims (10)
1. Brake booster which can still automatically brake in emergency in case of retardation, comprising
The brake system comprises a shell, a pedal force input unit, an electric power generating unit, a supporting and guiding unit, a resetting unit, a pedal force transmission unit, an electric power transmission unit and a braking force output unit;
the supporting and guiding unit comprises a bracket assembly and a guide rail assembly;
the pedal force transmission unit comprises a pedal force transmission rod (7) and a pedal force transmission plate (8);
the method is characterized in that:
the pedal force transmission rod (7) is axially clamped with the pedal force transmission plate (8); only when the automatic emergency brake is carried out, the pedal force transmission rod (7) and the pedal force transmission plate (8) can be separated at the clamping position under the condition of external force retardation;
alternatively, the first and second electrodes may be,
the pedal force transmission rod (7) and the pedal force transmission plate (8) are axially arranged in sequence and are only contacted and not connected;
the bracket component is provided with a guide hole;
and an anti-rotation triggering column (10) is arranged on the pedal force transfer plate (8), and the anti-rotation triggering column (10) penetrates through the guide hole.
2. A brake booster that automatically brakes urgently under a retarding condition as recited in claim 1 wherein:
the bracket assembly comprises a pedal force bracket (13), a pedal force guide element (15), an electric power bracket (12) and an electric power guide element (14);
the guide rail assembly comprises a guide rail (262), and the guide rail (262) is an inner and/or outer guide structure;
the pedal force bracket (13) comprises a pedal push rod (6) and at least one pedal force bracket arm (130) connected with the pedal push rod (6); the pedal force guide element (15) is arranged at the end of the pedal force bracket arm (130);
the electric power bracket (12) comprises an electric push rod (5) and at least one electric power bracket arm (120) connected with the electric push rod (5); the electrodynamic guide element (14) is arranged at the end of the electrodynamic support arm (120);
the pedal push rod (6) and the electric push rod (5) are both of a cylindrical structure with openings at two ends, the pedal push rod (6) is arranged in the electric push rod (5), and the pedal push rod and the electric push rod are in clearance fit and can move relatively along the axial direction;
the pedal force bracket arm (130) is connected with the guide rail (262) in a sliding way through a pedal force guide element (15);
the electrodynamic support arm (120) is slidingly connected with the guide rail (262) through an electrodynamic guide element (14);
the pedal force transmission rod (7) is arranged in the pedal push rod (6);
a first guide hole (131) is formed in the pedal force support arm (130), a second guide hole (121) is formed in the electric power support arm (120), and the anti-rotation triggering column (10) on the pedal force transfer plate (8) sequentially penetrates through the first guide hole (131) and the second guide hole (121).
3. A brake booster that automatically brakes urgently under a retarding condition as recited in claim 2 wherein:
the reset unit comprises a bracket reset spring;
the bracket return spring is arranged on the guide rail (262).
4. A brake booster that automatically brakes urgently under a retarding condition as recited in claim 2 wherein:
the guide rail (262) is a guide pillar with a concave, C-shaped or omega-shaped section;
the pedal force guide element (15) is matched with the outer wall of the guide rail (262) to realize external guide;
the electrodynamic guiding element (14) is matched with the inner wall of the guide rail (262) to realize inner guiding;
the reset unit comprises an electric power support reset spring (33), one end of the electric power support reset spring (33) is in contact with or connected with the shell of the brake booster, and the other end of the electric power support reset spring is in contact with or connected with an electric power guide element (14).
5. A brake booster that automatically brakes urgently under a retarding condition as recited in claim 1 wherein:
the bracket assembly comprises a pedal force bracket (13), a pedal force guide element (15), an electric power bracket (12) and an electric power guide element (14);
the guide rail assembly comprises a pedal force guide rail and an electric power guide rail, and the pedal force guide rail and the electric power guide rail are of inner and/or outer guide structures;
the pedal force bracket (13) comprises a pedal push rod (6) and at least one pedal force bracket arm (130) connected with the pedal push rod (6); the pedal force guide element (15) is arranged at the end of the pedal force bracket arm (130);
the electric power bracket (12) comprises an electric push rod (5) and at least one electric power bracket arm (120) connected with the electric push rod (5); the electrodynamic guide element (14) is arranged at the end of the electrodynamic support arm (120);
the pedal push rod (6) and the electric push rod (5) are both of a cylindrical structure with openings at two ends, the pedal push rod (6) is arranged in the electric push rod (5), and the pedal push rod and the electric push rod are in clearance fit and can move relatively along the axial direction;
the pedal force bracket arm (130) is connected with the pedal force guide rail in a sliding way through a pedal force guide element (15);
an electric power support arm (120) is in sliding connection with the electric power guide rail through an electric power guide element (14);
the pedal force transmission rod (7) is arranged in the pedal push rod (6);
a first guide hole (131) is formed in the pedal force support arm (130), a second guide hole (121) is formed in the electric power support arm (120), and the anti-rotation triggering column (10) on the pedal force transfer plate (8) sequentially penetrates through the first guide hole (131) and the second guide hole (121).
6. A brake booster that automatically brakes urgently under a retarding condition according to claim 5, wherein:
the electric power guide rail is a guide pillar with a concave, C-shaped or omega-shaped section;
the electrodynamic force guide element (14) is matched with the inner surface of the electrodynamic force guide rail to realize internal guide;
the reset unit comprises an electric power support reset spring;
the electric power support return spring is arranged in the electric power guide rail, one end of the electric power support return spring is in contact with or connected with a shell of the brake booster, and the other end of the electric power support return spring is in contact with or connected with an electric power guide element (14).
7. A brake booster that automatically brakes urgently under a retarding condition according to claim 5, wherein:
the electric power guide rail and the pedal force guide rail are guide pillars with concave, C-shaped or omega-shaped sections;
the electric power guide element (14) and the pedal force guide element (15) are matched with the inner surface of the electric power guide rail to realize inner guide;
the reset unit comprises an electric power support reset spring and a pedal force support reset spring;
the electric power support return spring is arranged in the electric power guide rail, one end of the electric power support return spring is in contact with or connected with a shell of the brake booster, and the other end of the electric power support return spring is in contact with or connected with an electric power guide element (14);
the pedal force support reset spring is arranged in the pedal force guide rail, one end of the pedal force support reset spring is in contact with or connected with the shell of the brake booster, and the other end of the pedal force support reset spring is in contact with or connected with the pedal force guide element (15).
8. A brake booster which remains automatically emergency brakable in the event of a blockage according to any one of claims 1 to 7, wherein:
when the pedal force transmission rod (7) and the pedal force transmission plate (8) are only contacted but not connected, the two are in plane fit, conical fit, concave-convex fit or blind hole nested fit.
9. A brake booster which remains automatically emergency brakable in the event of a blockage according to any one of claims 1 to 7, wherein: when the pedal force transmission rod (7) is clamped with the pedal force transmission plate (8), the pedal force transmission rod and the pedal force transmission plate are clamped in a spherical or columnar manner.
10. A brake booster that automatically brakes urgently under a retarding condition as recited in claim 9 wherein: the end part of the pedal force transmission rod (7) forms a plurality of cantilever structures (75) along an axial grooving, each cantilever structure (75) is provided with a circumferential groove (74)/a circumferential protrusion, and correspondingly, a circumferential protrusion (81)/a circumferential groove which is matched with the circumferential groove (74)/the circumferential protrusion to realize axial clamping is arranged in a central blind hole (82) at one end of the pedal force transmission plate (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922434996.8U CN211308523U (en) | 2019-12-30 | 2019-12-30 | Brake booster with automatic emergency braking even in the event of a blockage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922434996.8U CN211308523U (en) | 2019-12-30 | 2019-12-30 | Brake booster with automatic emergency braking even in the event of a blockage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211308523U true CN211308523U (en) | 2020-08-21 |
Family
ID=72066083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922434996.8U Withdrawn - After Issue CN211308523U (en) | 2019-12-30 | 2019-12-30 | Brake booster with automatic emergency braking even in the event of a blockage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211308523U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111086491A (en) * | 2019-12-30 | 2020-05-01 | 陕西国力信息技术有限公司 | Braking method and brake booster with automatic emergency braking even in the event of a blockage |
-
2019
- 2019-12-30 CN CN201922434996.8U patent/CN211308523U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111086491A (en) * | 2019-12-30 | 2020-05-01 | 陕西国力信息技术有限公司 | Braking method and brake booster with automatic emergency braking even in the event of a blockage |
| CN111086491B (en) * | 2019-12-30 | 2023-06-06 | 陕西国力信息技术有限公司 | Braking method and brake booster capable of automatically and emergently braking under blocking condition |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Brake booster with automatic emergency braking in case of block Effective date of registration: 20210622 Granted publication date: 20200821 Pledgee: Bank of Xi'an Limited by Share Ltd. South Main Street subbranch Pledgor: SHAANXI GUOLI INFORMATION TECHNOLOGY Co.,Ltd. Registration number: Y2021610000157 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220613 Granted publication date: 20200821 Pledgee: Bank of Xi'an Limited by Share Ltd. South Main Street subbranch Pledgor: SHAANXI GUOLI INFORMATION TECHNOLOGY Co.,Ltd. Registration number: Y2021610000157 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Brake booster that can still perform automatic emergency braking in case of blocking Effective date of registration: 20220621 Granted publication date: 20200821 Pledgee: Bank of Xi'an Limited by Share Ltd. South Main Street subbranch Pledgor: SHAANXI GUOLI INFORMATION TECHNOLOGY Co.,Ltd. Registration number: Y2022610000323 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200821 Effective date of abandoning: 20230606 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200821 Effective date of abandoning: 20230606 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230626 Granted publication date: 20200821 Pledgee: Bank of Xi'an Limited by Share Ltd. South Main Street subbranch Pledgor: SHAANXI GUOLI INFORMATION TECHNOLOGY Co.,Ltd. Registration number: Y2022610000323 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |