CN211308525U - Vehicle brake booster with automatic emergency braking even in the event of a retardation - Google Patents
Vehicle brake booster with automatic emergency braking even in the event of a retardation Download PDFInfo
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- CN211308525U CN211308525U CN201922438579.0U CN201922438579U CN211308525U CN 211308525 U CN211308525 U CN 211308525U CN 201922438579 U CN201922438579 U CN 201922438579U CN 211308525 U CN211308525 U CN 211308525U
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Abstract
In order to solve 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 but still automatic emergency braking's vehicle brake booster under retardant condition. The utility model discloses the footboard power transmission pole among the well footboard power transmission unit is two sections split type structures that constitute by anterior segment and back end, under the automatic emergency braking mode, when there is the foreign matter or driver's foot to stretch into vehicle brake pedal bottom, the motion of anterior segment is obstructed to make back end and anterior segment throw off, avoid the anterior segment to continue the translation and lead to 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 rear section can still translate under the action of the electric power, so that the electric power transmission unit is not prevented from transmitting the electric power to the braking force output unit to implement braking operation.
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 there is the potential safety hazard in the present brake booster that has retardant recognition function, the utility model provides a but still automatic emergency braking's vehicle brake booster under retardant condition.
The technical scheme of the utility model is that:
a vehicle brake booster that automatically brakes urgently in the event of a retardation condition, 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 includes a pedal force transmission rod;
it is characterized in that:
the pedal force transmission rod comprises a front section and a rear section which are coaxially clamped; only during the automatic emergency braking, the front section and the rear section can be separated at the clamping part under the external force retardation; or the pedal force transmission rod comprises a front section, a middle section and a rear section which are coaxially and sequentially clamped; only during the automatic emergency braking, the front section and the middle section or the middle section and the rear section can be separated from the clamping part under the condition of external force resistance;
the outer side wall of the rear section is fixedly connected with a pedal force transmission plate, and an anti-rotation triggering column is arranged on the pedal force transmission plate;
the support component is provided with a guide hole, and the anti-rotation triggering column 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 electric power support reset spring, one end of the electric power support reset spring is in contact with or connected with a shell of the automatic emergency brake booster of the vehicle, and the other end of the electric power support reset spring is in contact with or connected with an electric power 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 a shell of the automatic emergency brake booster of the vehicle, 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 a shell of the automatic emergency brake booster of the vehicle, 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 a shell of the automatic emergency brake booster of the vehicle, and the other end of the pedal force support reset spring is in contact with or connected with the pedal force guide element.
Furthermore, when the pedal force transmission rod is in a two-section type, the front section and the rear section are clamped through a spherical clamping head and a claw-shaped clamping groove.
Further, when the pedal force transmission rod is of a three-section type, the front section and the middle section and the rear section are respectively clamped and connected through a spherical clamping head and a claw-shaped clamping groove.
Compared with the prior art, the utility model has the advantages that:
1. the utility model discloses the footboard power transmission pole among the well footboard power transmission unit is two sections split type structures that constitute by anterior segment and back end, under the automatic emergency braking mode, when there is the foreign matter or driver's foot to stretch into vehicle brake pedal bottom, the motion of anterior segment is obstructed to make back end and anterior segment throw off, avoid the anterior segment to continue the translation and lead to 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 rear section 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 to implement braking operation, and the potential safety hazard is avoided.
2. The pedal force transmission rod in the middle pedal force transmission unit of the utility model is of a three-section split structure formed by coaxially clamping a front section, a middle section and a rear section, and under the automatic emergency braking mode, when foreign matters or feet of a driver extend into the bottom of the brake pedal, the movement of the front section or the middle section is blocked, so that the front section and the middle section or the middle section and the rear section are separated, and the situation that the feet of the driver are clamped and damaged due to the continuous translation of the front section or the damage of parts of a braking system is caused by firm foreign matters is avoided; meanwhile, the rear section can still translate under the action of the electric braking force to transmit the electric braking force to the braking force output unit, so that the electric power transmission unit cannot be prevented from transmitting the electric power to the braking force output unit to implement braking operation, and the potential safety hazard is avoided; simultaneously, because footboard power transmission rod has two departments joint, if one of them department of joint extremely can not throw off when can not throw off because of corrosion etc. the card, can also throw off from another department, for two sections split type designs, the reliability of throwing off between each section of footboard power transmission rod when further having improved the footboard and blocking.
3. The utility model discloses connect for the joint between each section of well footboard power transmission pole, do not have the idle stroke between each section, during normal braking, the driver is when trampling brake pedal, and brake pedal impression is better.
4. The utility model discloses connect for the joint between each section of well footboard power transmission pole, do not have the idle stroke between each section, during automatic emergency braking, can the quick response driver interrupt automatic emergency braking's operation, satisfy the requirement that the country should have driver intervention performance to passenger car Automatic Emergency Braking System (AEBS).
5. The utility model discloses a retardant recognition principle can be applied to the tradition and have the brake booster of automatic emergency braking function, and the design of the footboard power transmission pole in the footboard power transmission unit among the traditional brake booster is split type, makes very little change on current vehicle helping hand stopper basis 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, and the implementation cost is low.
6. When the utility model discloses each section of well footboard power transmission pole is produced because of the retardation force and is thrown off the back during automatic emergency braking, can disappear the back at the retardation force, through the artifical mode of exerting the footboard power, and the joint once more is easily realized, need not maintenance or influence reuse.
7. 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.
Drawings
Fig. 1 is a schematic diagram of the embodiment 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 one embodiment of a snap fit between the sections of the pedal force transmitting lever of FIG. 19.
Description of reference numerals:
1-pedal force input rod, 2-motor output gear, 3-intermediate gear set, 4-transmission gear box, 41-screw box, 42-transmission gear, 5-electric push rod, 51-external thread, 6-pedal push rod, 7-pedal force transmission rod, 71-front section, 712-first claw-shaped clamping groove, 72-rear section, 722-second claw-shaped clamping groove, 73-middle section, 731-first ball-shaped clamping head, 732-second ball-shaped clamping head, 711-ball-shaped clamping head, 721-claw-shaped clamping groove, 8-pedal force transmission plate, 10-anti-rotation triggering column, 101-first carrier, 102-second carrier, 11-pedal force return spring, 12-electric power support, 120-electric power support arm, 121-second guide hole, 122-elastic attachment, 13-pedal force support, 130-pedal force support arm, 131-first guide hole, 14-electrodynamic guide element, 15-pedal force guide element, 17-booster push piece, 171-through hole, 172-snap, 173-guide structure, 18-second elastic element, 19-braking force output element a, 20-braking force output element B, 21-bearing bushing, 22-flanged 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 cylinder, 29-master cylinder fixing bolt, 31-motor, 33-electrodynamic support return spring, 35-first elastic element, 36-induction magnet, 37-connector, 38-Hall sensor, 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; the pedal force transmission rod 7 includes a front section 71 and a rear section 72 that are coaxially arranged; one end of the front section 71 is connected with the output end of the pedal force input rod 1, and the other end of the front section 71 is clamped with one end of the rear section 72; specifically, a spherical chuck 711 is arranged at the end where the front section 71 and the rear section 72 are clamped, and a claw-shaped clamping groove 721 for holding the spherical chuck 711 is arranged at the end where the rear section 72 and the front section 71 are clamped.
As shown in fig. 1, the other end of the rear section 72 is embedded (or sleeved in other embodiments) with a first elastic element 35, 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, there is an axial idle stroke between the first elastic element 35 and the input of the braking force output unit (in other embodiments, there may be no axial idle stroke but only a micro-force stroke); the outer side wall of the rear section 72 is fixedly connected with a pedal force transmission plate 8; an anti-rotation triggering post 10 is arranged on the pedal force transmission plate 8.
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 front section 71 and a part of the rear section 72 of the pedal force transmission rod 7 are 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 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 and outer guide structure; the electric power guide rail and the pedal force guide rail can be guide pillars with concave, C-shaped or omega-shaped sections; 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 disposed outside the rear section 72 of the pedal force transmission rod 7 and between the assist pusher 17 and the pedal force transmission plate 8.
As shown in fig. 9, 12, the electromotive force generating unit includes a sensor assembly, a control unit, 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 a 19 and a braking force output element B20 axially connected; the braking force output element a 19 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, the driver applies pedal force to the pedal force input rod 1, so that the pedal force input rod 1 is translated along the braking direction, the front section 71 of the pedal force transmission rod 7, the rear section 72 of 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 a 19 and is compressed, and meanwhile, the pedal force is transmitted to the braking force output element a 19 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 a 19 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 rear section 72 of the pedal force transmission rod 7, the front section 71 of 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 signal that braking is required, the control unit controls the motor 31 to start, when the brake pedal is not blocked (e.g. when not holding a foot), the force in the direction opposite to the braking direction is small because the only element exerting 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 resilient attachment 122 on the electric power bracket arm 120 or to change the spacing between the second carrier 102 on the pedal force transfer 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, spherical dop 711 on footboard power transmission bar 7 anterior segment 71 is tightly wrapped up by claw type draw-in groove 721 on the back end 72, does not have the idle stroke between anterior segment 71 and the back end 72, and the driver is when trampling brake pedal, and brake pedal impression is better. In addition, since the front section 71 and the rear section 72 are connected together, it is possible to quickly respond to the driver's operation of interrupting the automatic emergency braking during the automatic emergency braking.
During automatic emergency braking, when the brake pedal is blocked by an obstacle, and the active radar of the vehicle detects that the front obstacle is within the braking threshold, a braking signal is sent to the control unit (the control unit has an interface for receiving the braking signal) in the electric power generation unit, and the control unit drives the motor 31 to operate to generate electric power after receiving the braking signal, at this time, the movement of the pedal force input rod 1, the front section 71 of the pedal force transmission rod 7, the rear section 72 of the pedal force transmission rod 7, the pedal force transmission plate 8 and the anti-rotation triggering column 10 fixed on the pedal force transmission plate 8 is limited due to the obstacle, and at this time, besides the force applied by the 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 spherical dop 711 of footboard power transmission pole 7 anterior segment 71 breaks away from the parcel of claw type draw-in groove 721 of back end 72 for anterior segment 71 and the back end 72 separation of footboard power transmission pole 7, anterior segment 71 stops to continue to follow the motion of braking force direction, thereby make brake pedal loosen, reach the purpose that prevents to press from both sides wounded driver foot, back end 72 still can continue the translation under the effect of electric power, can not hinder electric power transmission unit and carry out braking operation on transmitting electric power to braking force output unit.
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 designed into a three-section structure and comprises a front section 71, a middle section 73 and a rear section 72 which are axially and sequentially clamped by a spherical clamping head and a claw-shaped clamping groove; specifically, as shown in fig. 20, a first ball chuck 731 and a second ball chuck 732 are respectively disposed at two ends of the middle section 73, a first claw-shaped slot 712 is disposed at one end of the front section 71, a second claw-shaped slot 722 is disposed at one end of the rear section 72, the front section 71 and the middle section 73 are cooperatively clamped with the first ball chuck 731 through the first claw-shaped slot 712, and the rear section 72 and the middle section 73 are cooperatively clamped with the second ball chuck 732 through the second claw-shaped slot 722. Only during automatic emergency braking, the front section 71, the middle section 73 or the middle section 73, the rear section 72 can be disengaged at the engagement point under the external force retardation. Compared with a two-section design, the three-section design has higher reliability, and when one clamping position is corroded to cause that the pedal force transmission rod 7 cannot be separated and divided into two sections, the other clamping position can be separated and divided into two sections.
The working principle of the embodiment is the same as that of the first embodiment.
Claims (9)
1. A vehicle brake booster that automatically brakes urgently in the event of a retardation condition, 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);
the method is characterized in that:
the pedal force transmission rod (7) comprises a front section (71) and a rear section (72) which are coaxially clamped; only when the brake is automatically applied in emergency, the front section (71) and the rear section (72) can be separated at the clamping part under the external force retardation; or the pedal force transmission rod (7) comprises a front section (71), a middle section (73) and a rear section (72) which are coaxially and sequentially clamped; only during automatic emergency braking, the front section (71) and the middle section (73) or the middle section (73) and the rear section (72) can be separated from the clamping part under the condition of external force retardation;
the outer side wall of the rear section (72) is fixedly connected with a pedal force transfer plate (8), and an anti-rotation trigger column (10) is arranged on the pedal force transfer plate (8);
the support component is provided with a guide hole, and the anti-rotation triggering column (10) penetrates through the guide hole.
2. A vehicle brake booster that provides automatic emergency braking even in the event of a retardation as set forth 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 vehicle brake booster that provides automatic emergency braking even in the event of a retardation as set forth 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 vehicle brake booster that provides automatic emergency braking even in the event of a retardation as set forth 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 a shell of the automatic emergency brake booster of the vehicle, 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 vehicle brake booster that provides automatic emergency braking even in the event of a retardation as set forth 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 vehicle brake booster that provides automatic emergency braking even in the event of a retardation as set forth in 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 automatic emergency brake booster of the vehicle, 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 vehicle brake booster that provides automatic emergency braking even in the event of a retardation as set forth in 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 automatic emergency brake booster of the vehicle, 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 a shell of the automatic emergency brake booster of the vehicle, 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 vehicle brake booster that provides automatic emergency braking even in the event of a retardation according to any one of claims 1 to 7 wherein:
when the pedal force transmission rod (7) is in a two-section type, the front section (71) and the rear section (72) are clamped through a spherical clamping head and a claw-shaped clamping groove.
9. A vehicle brake booster that provides automatic emergency braking even in the event of a retardation according to any one of claims 1 to 7 wherein:
when the pedal force transmission rod (7) is of a three-section type, the front section (71) and the middle section (73) and the rear section (72) are respectively clamped and connected in a spherical clamping head and a claw-shaped clamping groove mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922438579.0U CN211308525U (en) | 2019-12-30 | 2019-12-30 | Vehicle brake booster with automatic emergency braking even in the event of a retardation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922438579.0U CN211308525U (en) | 2019-12-30 | 2019-12-30 | Vehicle brake booster with automatic emergency braking even in the event of a retardation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211308525U true CN211308525U (en) | 2020-08-21 |
Family
ID=72075892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922438579.0U Withdrawn - After Issue CN211308525U (en) | 2019-12-30 | 2019-12-30 | Vehicle brake booster with automatic emergency braking even in the event of a retardation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211308525U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110936933A (en) * | 2019-12-30 | 2020-03-31 | 陕西国力信息技术有限公司 | Method and vehicle brake booster for automatic emergency braking even in the event of a retardation |
-
2019
- 2019-12-30 CN CN201922438579.0U patent/CN211308525U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110936933A (en) * | 2019-12-30 | 2020-03-31 | 陕西国力信息技术有限公司 | Method and vehicle brake booster for automatic emergency braking even in the event of a retardation |
| CN110936933B (en) * | 2019-12-30 | 2023-12-19 | 陕西国力信息技术有限公司 | Method for automatically braking emergency in case of blocking and vehicle brake booster |
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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 | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Vehicle 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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| PC01 | Cancellation 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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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Vehicle brake booster that can still automatically emergency brake 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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| 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 | ||
| 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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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
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Granted publication date: 20200821 Effective date of abandoning: 20231219 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200821 Effective date of abandoning: 20231219 |