CN111002957B - Automatic emergency brake booster for vehicle - Google Patents
Automatic emergency brake booster for vehicle Download PDFInfo
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- CN111002957B CN111002957B CN201911396189.XA CN201911396189A CN111002957B CN 111002957 B CN111002957 B CN 111002957B CN 201911396189 A CN201911396189 A CN 201911396189A CN 111002957 B CN111002957 B CN 111002957B
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- pedal force
- electric power
- guide rail
- brake booster
- emergency brake
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- 230000005540 biological transmission Effects 0.000 claims description 97
- 230000005520 electrodynamics Effects 0.000 claims description 24
- 238000009434 installation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 5
- 230000006698 induction Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/06—Disposition of pedal
Abstract
The invention provides an automatic emergency brake booster for a vehicle, aiming at solving the technical problem that manual braking can be realized only by paying large force when a motor of a traditional automatic emergency brake booster for the vehicle fails. The invention adopts a structure of double supports and two-side reset, no matter the electric power support is only provided with the reset spring, or the double supports are provided with respective guide rails and simultaneously the electric power support and the pedal force support are both provided with the reset spring, when the motor of the automatic emergency brake booster of the vehicle breaks down, a driver does not need to overcome the elasticity of the reset spring of the electric power support when braking manually, so the pedal force required to be exerted is less than that of the prior art.
Description
Technical Field
The invention relates to an automatic emergency brake booster for a vehicle.
Background
The conventional automatic emergency brake booster for vehicles 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 force output unit; the electric power transmission unit is used for transmitting electric power to the power 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 a vehicle brake master cylinder.
Conventional automatic emergency brake boosters for vehicles mostly adopt a structure of single bracket and intermediate reset, and when resetting, the pedal force transmission unit and the electric power transmission unit are reset simultaneously, for example, the automatic emergency brake boosters disclosed in patent documents with publication numbers CN 107949509 a, CN 106427966A and CN 105398440B. The common disadvantages of these automatic emergency brake boosters for vehicles are:
1. when the motor of the electric power generation unit fails, a driver needs to exert large force when manually stepping on the brake pedal to brake, and the burden of the driver is increased.
2. When the guide rod (also called as a guide rail or a guide pillar) is assembled, the consistency of bolt tightening torque is difficult to ensure due to dimensional tolerance, so that the assembly consistency of the guide rod cannot be ensured, and the reliability of the whole product is further influenced.
Disclosure of Invention
The invention provides an automatic emergency brake booster for a vehicle, aiming at solving the technical problem that manual braking can be realized only by paying large force when a motor of a traditional automatic emergency brake booster for the vehicle fails.
The technical scheme of the invention is as follows:
an automatic emergency brake booster for vehicle comprises
A supporting and guiding unit and a resetting unit;
it is characterized in that:
the supporting and guiding unit comprises a pedal force bracket, a pedal force guiding element, a pedal force guide rail, an electrodynamic force bracket, an electrodynamic force guiding element and an electrodynamic force guide rail;
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 guide rail is an inner and/or outer guide structure;
the electric power guide rail is an inner and/or outer guide structure;
the reset unit includes an electric power support reset spring for resetting the electric power support.
Further, the reset unit further comprises a pedal force bracket reset spring for resetting the pedal force bracket.
Further, one end of the pedal force support return spring is in contact with or connected to the pedal force guide element, and the other end of the pedal force support return spring is in contact with or connected to a housing, an end cover or the pedal force guide rail of the automatic emergency brake booster of the vehicle.
Furthermore, the pedal force guide rail is a guide pillar with a concave, C-shaped or omega-shaped section, and the pedal force guide element is matched with the inner wall of the pedal force guide rail to realize inner guide; the pedal force support return spring is arranged in the pedal force guide rail, one end of the pedal force support return spring is in contact with or connected with the pedal force guide element, and the other end of the pedal force support return spring is in contact with or connected with an end cover of the automatic emergency brake booster of the vehicle.
Further, one end of the electric power support return spring is in contact with or connected with the electric power guide element, and the other end of the electric power support return spring is in contact with or connected with a shell, an end cover or the electric power guide rail of the automatic emergency brake booster of the vehicle.
Furthermore, the electric power guide rail is a guide pillar with a concave, C-shaped or omega-shaped section, and the electric power guide element is matched with the inner wall of the electric power guide rail to realize internal guide; 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 electric power guide element, and the other end of the electric power support return spring is in contact with or connected with an end cover of the automatic emergency brake booster of the vehicle.
Further, the pedal force guide rail and/or the electric power guide rail are arranged on a side wall of the vehicle automatic emergency brake booster shell;
or the pedal force guide rail and/or the electric power guide rail are/is arranged on the upper bottom surface of the shell of the automatic emergency brake booster of the vehicle;
or the pedal force guide rail and/or the electric power guide rail are/is arranged on the lower bottom surface of the shell of the automatic emergency brake booster of the vehicle;
alternatively, the pedal force guide rail and/or the electric power guide rail are disposed in the installation space of the vehicle automatic emergency brake booster housing and pass through the upper bottom surface or the lower bottom surface of the vehicle automatic emergency brake booster housing.
Further, the automatic emergency brake booster for the vehicle further comprises a transmission assembly, a transmission gear nut and an external thread arranged on the outer side wall of the electric push rod;
the transmission gear nut consists of a nut with internal threads and a transmission gear with external transmission teeth, and the transmission gear is arranged outside the nut;
the input gear of the transmission assembly is arranged on the output shaft of the motor of the automatic emergency brake booster of the vehicle, and the output gear of the transmission assembly is meshed with the transmission gear;
the transmission gear nut is sleeved outside the electric push rod and is in threaded connection with the external thread through the internal thread of the nut, and the electric push rod is driven to move along the axial direction.
The invention also provides another vehicle automatic emergency brake booster, which comprises
A supporting and guiding unit and a resetting unit;
it is characterized in that:
the supporting and guiding unit comprises a guide rail, a pedal force bracket, a pedal force guiding element, an electric power bracket and an electric power guiding element;
the guide rail is of an inner guide structure and an 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 support arm is connected with the guide rail in a sliding mode through a pedal force guide element, and the pedal force guide element is matched with the outer wall of the guide rail to achieve external guide;
the electric power support arm is connected with the guide rail in a sliding mode through an electric power guide element, and the electric power guide element is matched with the inner wall of the guide rail to achieve internal guide;
the reset unit comprises an electric power support reset spring for resetting the electric power support; the electric power support return spring is arranged in the guide rail, one end of the electric power support return spring is in contact with or connected with the electric power guide element, and the other end of the electric power support return spring is in contact with or connected with an end cover of the automatic emergency brake booster of the vehicle.
Further, the guide rail is disposed on a side wall of the vehicle automatic emergency brake booster housing;
or the guide rail is arranged on the upper bottom surface of the shell of the automatic emergency brake booster of the vehicle;
or the guide rail is arranged on the lower bottom surface of the shell of the automatic emergency brake booster of the vehicle;
or, the guide rail is arranged in the installation space of the vehicle automatic emergency brake booster shell and penetrates through the upper bottom surface or the lower bottom surface of the vehicle automatic emergency brake booster shell.
Optionally, the guide rail is arranged on the upper bottom surface of the vehicle automatic emergency brake booster shell;
or the guide rail is arranged on the lower bottom surface of the shell of the automatic emergency brake booster of the vehicle;
or the guide rail is arranged in the installation space of the shell of the vehicle automatic emergency brake booster and penetrates through the upper bottom surface or the lower bottom surface of the shell of the vehicle automatic emergency brake booster;
the reset unit also comprises a pedal force bracket reset spring for resetting the pedal force bracket;
the pedal force support return spring and the electric power support return spring are coaxially overlapped;
the pedal force support reset spring is arranged outside the guide rail, one end of the pedal force support reset spring is in contact with or connected with the pedal force guide element, and the other end of the pedal force support reset spring is in contact with or connected with an end cover of the automatic emergency brake booster of the vehicle;
the electric power support return spring is arranged in the guide rail, one end of the electric power support return spring is in contact with or connected with the electric power guide element, and the other end of the electric power support return spring is in contact with or connected with an end cover of the automatic emergency brake booster of the vehicle.
Further, the automatic emergency brake booster for the vehicle further comprises a transmission assembly, a transmission gear nut and an external thread arranged on the outer side wall of the electric push rod;
the transmission gear nut consists of a nut with internal threads and a transmission gear with external transmission teeth, and the transmission gear is arranged outside the nut;
the input gear of the transmission assembly is arranged on the output shaft of the motor of the automatic emergency brake booster of the vehicle, and the output gear of the transmission assembly is meshed with the transmission gear;
the transmission gear nut is sleeved outside the electric push rod and is in threaded connection with the external thread through the internal thread of the nut, and the electric push rod is driven to move along the axial direction.
Compared with the prior art, the invention has the advantages that:
1. the automatic emergency brake booster for the vehicle adopts a structure of double supports and two-side reset, no matter the electric power support is only provided with the reset spring, or the double supports are provided with respective guide rails and simultaneously the electric power support and the pedal force support are both provided with the reset spring, when a motor of the automatic emergency brake booster for the vehicle fails, a driver does not need to overcome the elastic force of the electric power support reset spring during manual braking, and therefore, the pedal force required to be exerted is less than that in the prior art.
2. The pedal force guide rail and the electric force guide rail are arranged on the side wall of the shell of the automatic emergency brake booster of the vehicle and are integrally formed with the shell, so that the consistency of the guide rails is effectively ensured, and the stability and the reliability of a product are improved; meanwhile, the link of independently assembling the pedal force guide rail and the electrodynamic force guide rail is omitted, the production efficiency is improved, and the manufacturing cost is reduced.
3. According to the invention, the electric push rod and the transmission gear nut are in thread fit transmission, so that the thread machining efficiency and cost are lower, and the manufacturing cost is further reduced.
Drawings
Fig. 1 is a sectional view of a first embodiment of the present invention.
Fig. 2 is a schematic diagram of the cooperation of the electric power generating unit and the electric power transmitting unit in the first embodiment of the invention.
Fig. 3 is a schematic view of the matching of the transmission gear nut and the electric push rod in the invention.
Fig. 4 is an exploded view of fig. 3.
Fig. 5 is a schematic view of the electric force support and the electric force guiding element in one embodiment of the invention.
Fig. 6 is a schematic structural view of an embodiment of an electric powered support arm (i.e., with the electric powered support removed from the electric powered push rod) in accordance with an embodiment of the present invention.
Fig. 7 is a schematic view of the pedal force bracket and the pedal force guide member in cooperation with each other according to the first embodiment of the present invention.
Fig. 8 is a schematic structural view of a pedal force transmission plate according to a first embodiment of the present invention.
Fig. 9 is a schematic view of the middle housing and the bottom housing after being engaged according to the first embodiment of the invention.
Fig. 10 is an exploded view of a drive tooth nut in accordance with an embodiment of the present invention.
FIG. 11 is a schematic view of a power assisted pusher and connector according to an embodiment of the present invention.
Fig. 12 is a schematic view of a mechanism in a static state according to an embodiment of the present invention.
Fig. 13 is a schematic view of a mechanism braking state according to an embodiment of the present invention.
Fig. 14 is a sectional view of a second embodiment of the present invention.
Fig. 15 shows another embodiment of the intermediate housing according to the invention.
Description of reference numerals:
1-pedal force input rod, 2-motor output gear, 3-intermediate gear set, 4-driving gear box, 41-screw box, 42-driving gear, 5-electric push rod, 51-external thread, 6-pedal push rod, 7-pedal force transmission rod, 71-front section, 72-rear section, 711-ball chuck, 721-claw type 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 bracket, 120-electric power bracket arm, 121-second guide hole, 122-elastic accessory, 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 invention is further described below with reference to the accompanying drawings.
The first embodiment is as follows:
a vehicle automatic emergency brake booster includes a housing, a pedal force input unit, a pedal force transmission unit, a support and guide unit, an electric power transmission unit, an electric power generation unit, a reset unit, and a braking force output unit.
As shown in fig. 1 and 9, the housing includes an upper cover 27, an intermediate housing 26, and a bottom case 23, which are connected in sequence; the middle part of the upper cover 27 is provided with a through hole for the columnar input end of the brake master cylinder 28 to pass through; four bolt fixing holes 261 are formed in the inner side wall of the middle shell 26 (the bolt fixing holes 261 can play a role in connection and can also bear acting force), and the middle shell 26 can be manufactured by adopting processes such as stretching forming, die-casting forming and injection molding; the brake master cylinder 28 is fixedly mounted 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; the side cavity of the bottom shell 23 is also used for accommodating a connector 37; a flange steel plate 22 is installed at the bottom outer side 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. 1-2, 4, 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 part where the front section 71 and the rear section 72 are clamped, and a claw-shaped clamping groove 721 for tightly holding the spherical chuck 711 is arranged at the end part where the rear section 72 and the front section 71 are clamped; the front section 71 and the rear section 72 are engaged with the claw groove 721 by the ball chuck 711, and the front section 71 and the rear section 72 can be disengaged only in the automatic emergency braking mode and under the external force retardation.
As shown in fig. 1 and 8, the other end of the rear section 72 is embedded with the first elastic element 35; in the rest state, there is an axial idle stroke between the first elastic element 35 and the input of the force output unit; 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. 1-7, 9, the bracket assembly includes a pedal force bracket 13, a pedal force guide member 15, an electromotive force bracket 12, an electromotive force guide member 14; the guide rail assembly comprises two guide rails 262 which are parallel to each other and have C-shaped sections, and the guide rails 262 are arranged on the inner side wall of the middle shell 26 and are integrally formed with the middle shell 26; 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 two open ends, the pedal push rod 6 is embedded in the electric push rod 5, and the pedal force support arm 130 is closer to the braking force output unit relative to the electric power support 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. 6, the electric power bracket arm 120 is further provided with an elastic attachment 122 at a contact portion with the pedal force transfer plate 8; as shown in fig. 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 said elastic appendage 122 in deformation when the brake pedal of the vehicle is blocked by a foreign body; 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.
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. 1-3, 10, the electric power transmission unit includes a driving gear nut 4, an external thread 51 provided on the outer wall of the electric push rod 5 of the electric power bracket 12, a power assist pusher 17 and a second elastic member 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 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 11, 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 part 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 force output unit; the second elastic element 18 is disposed between the pedal force bracket 13 and the electric power bracket 12. The electric power is transmitted to the braking force output unit through the transmission gear 42, the screw 41, the external thread 51, the electric power bracket 12, the second elastic element 18, the pedal force bracket 13 and the power-assisted push piece 17 in sequence.
As shown in fig. 11, the boosting push-piece 17 is further provided with four guide structures 173 with fan-shaped cross sections, and the shape defined by the outer walls of the plurality of guide structures 173 with fan-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 axial rotation-proof movement along the plurality of guide structures 173 with fan-shaped cross sections of the boosting push-piece 17.
The sensor fixing frame 39 is arranged on the side edge of the boosting push piece 17, and four buckles 172 are symmetrically arranged on the bottom edge of the boosting push piece 17 and used for connecting the boosting push piece 17 with the pedal force support 13.
As shown in fig. 1, the return unit includes a pedal force return spring 11 and an electric power bracket return spring 33; the pedal force return spring 11 is arranged outside the rear section 72 of the pedal force transmission rod 7 and is positioned between the boosting push piece 17 and the pedal force transmission plate 8; 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's manual braking is labor-saving when the electromotive force generating unit malfunctions.
As shown in fig. 2, 11, 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 assembly 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 that are axially connected.
The auxiliary braking principle and process of the present embodiment is described below in conjunction with fig. 1, 12-13:
during braking, the driver applies pedal force to the pedal force input rod 1 to make the pedal force input rod 1 translate along the braking direction, so as to push 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 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 up 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 push member 17 to translate together, and finally, the resultant of the pedal force and the electromotive force is transmitted to the braking force output element a19 through the power 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 control unit controls the motor 31 to stop running, and the original braking torque 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.
In this embodiment, under normal braking conditions, the ball clamp 711 on the front section 71 of the pedal force transmission rod 7 is tightly wrapped by the claw-shaped clamp slot 721 on the rear section 72, and there is no idle stroke between the front section 71 and the rear section 72, so that the driver can feel better when stepping on the brake pedal. 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 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 in an electric power generation unit, the control unit drives a motor 31 to operate to generate electric power after receiving the braking signal, at this time, the movement of a pedal force input rod 1, a front section 71 of the pedal force transmission rod 7, a rear section 72 of the 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, at this time, 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 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 stop to continue to follow the motion of brake force direction, thereby make brake pedal loosen, reach the purpose that prevents to press from both sides and hinder driver's foot, and back end 72 still can continue the translation under the effect of electric power, implements the 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. 14, the present embodiment differs from the first embodiment only in that: the second elastic element 18 is arranged between the first elastic element 35 and the braking force output element a19, the second elastic element 18 is in a circular ring structure, and the first elastic element 35 can pass through the second elastic element 18 to transmit the braking force to the braking force output element a 19.
Example three:
the present embodiment is different from the first embodiment only in that:
1. the electromotive force bracket 12 and the pedal force bracket 13 do not share a guide rail, but have respective guide rails, that is, the guide rail assembly includes an electromotive force guide rail and a pedal force guide rail;
2. the electric power guide rail and the pedal force guide rail are guide posts with concave, C-shaped or omega-shaped sections (as shown in figure 15), an electric power support return spring is installed in the electric power guide rail, and a pedal force support return spring is installed in the pedal force guide rail.
The rest of the structure is the same as the first embodiment.
Example four:
the structure of the present embodiment is substantially the same as that of the second embodiment, and the difference is only that: the present embodiment mounts the electric power bracket return spring only within the electric power rail.
Example five:
the present embodiment is different from the first embodiment only in that: the guide rails 262 are not provided on the side walls of the intermediate housing 26, but on the inner bottom surface of the bottom case 23.
Example six:
the present embodiment is different from the first embodiment only in that: the guide rails 262 are solid guide posts and are separated from the side walls of the middle housing 26, and the guide rails 262 pass through the upper cover 27 and the bottom housing 23 and are connected with the upper cover 27 and the bottom housing 23 through bolts.
Example seven:
the present embodiment is different from the first embodiment only in that: the guide rail 262 is separated from the side wall of the middle housing 26, and the pedal force support return spring is sleeved outside the guide rail 262, and the elastic force of the pedal force support return spring is smaller than that of the electrodynamic force support return spring, at this time, the pedal force support return spring and the electrodynamic force support return spring are coaxially overlapped.
Claims (12)
1. An automatic emergency brake booster for vehicle comprises
A supporting and guiding unit and a resetting unit;
the method is characterized in that:
the supporting and guiding unit comprises a pedal force support (13), a pedal force guiding element (15), a pedal force guide rail, an electric power support (12), an electric power guiding element (14) and an electric power guide rail;
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 guide rail is an inner and/or outer guide structure;
the electric power guide rail is an inner and/or outer guide structure;
the reset unit includes an electric power support reset spring for resetting the electric power support (12).
2. A vehicle automatic emergency brake booster as set forth in claim 1, wherein:
the resetting unit further comprises a pedal force bracket resetting spring for resetting the pedal force bracket (13).
3. A vehicle automatic emergency brake booster as set forth in claim 2, wherein:
one end of the pedal force support return spring is contacted or connected with the pedal force guide element (15), and the other end of the pedal force support return spring is contacted or connected with a shell, an end cover or the pedal force guide rail of the vehicle automatic emergency brake booster.
4. A vehicle automatic emergency brake booster as set forth in claim 3, wherein:
the pedal force guide rail is a guide pillar with a concave, C-shaped or omega-shaped section, and the pedal force guide element (15) is matched with the inner wall of the pedal force guide rail to realize inner guide;
the pedal force support return spring is arranged in the pedal force guide rail, one end of the pedal force support return spring is contacted or connected with the pedal force guide element (15), and the other end of the pedal force support return spring is contacted or connected with an end cover of the automatic emergency brake booster of the vehicle.
5. A vehicle automatic emergency brake booster as set forth in claim 1, wherein:
one end of the electric power support return spring is contacted or connected with the electric power guide element (14), and the other end of the electric power support return spring is contacted or connected with a shell, an end cover or the electric power guide rail of the automatic emergency brake booster of the vehicle.
6. A vehicle automatic emergency brake booster as set forth in claim 5, wherein:
the electrodynamic force guide rail is a guide pillar with a concave, C-shaped or omega-shaped section, and the electrodynamic force guide element (14) is matched with the inner wall of the electrodynamic force guide rail to realize inner guide;
the electric power support return spring is arranged in the electric power guide rail, one end of the electric power support return spring is contacted or connected with the electric power guide element (14), and the other end of the electric power support return spring is contacted or connected with an end cover of the automatic emergency brake booster of the vehicle.
7. A vehicle automatic emergency brake booster according to any one of claims 1 to 6, wherein:
the pedal force guide rail and/or the electric force guide rail are/is arranged on the side wall of the shell of the automatic emergency brake booster of the vehicle;
or the pedal force guide rail and/or the electric power guide rail are/is arranged on the upper bottom surface of the shell of the automatic emergency brake booster of the vehicle;
or the pedal force guide rail and/or the electric power guide rail are/is arranged on the lower bottom surface of the shell of the automatic emergency brake booster of the vehicle;
alternatively, the pedal force guide rail and/or the electric power guide rail are disposed in the installation space of the vehicle automatic emergency brake booster housing and pass through the upper bottom surface or the lower bottom surface of the vehicle automatic emergency brake booster housing.
8. A vehicle automatic emergency brake booster according to any one of claims 1 to 6, wherein:
the automatic emergency brake booster for the vehicle further comprises a transmission component, a transmission gear nut (4) and an external thread (51) arranged on the outer side wall of the electric push rod (5);
the transmission gear nut (4) is composed of a nut (41) with internal threads and a transmission gear (42) with external transmission teeth, and the transmission gear (42) is arranged outside the nut (41);
the input gear of the transmission assembly is arranged on the motor output shaft of the automatic emergency brake booster of the vehicle, and the output gear of the transmission assembly is meshed with the transmission gear (42);
the transmission gear nut (4) is sleeved outside the electric push rod (5), the transmission gear nut (4) is connected with the thread of the external thread (51) through the internal thread of the screw nut (41), and drives the electric push rod (5) to move along the axial direction.
9. An automatic emergency brake booster for vehicle comprises
A supporting and guiding unit and a resetting unit;
the method is characterized in that:
the supporting and guiding unit comprises a guide rail (262), a pedal force bracket (13), a pedal force guiding element (15), an electric power bracket (12) and an electric power guiding element (14);
the guide rail (262) is of an inner guide structure and an 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 in sliding connection with the guide rail (262) through a 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 electric power support arm (120) is connected with the guide rail (262) in a sliding mode through an electric power guide element (14), and the electric power guide element (14) is matched with the inner wall of the guide rail (262) to achieve internal guide;
the reset unit comprises an electric power support reset spring (33) for resetting the electric power support (12); the electric power support return spring (33) is arranged in the guide rail (262), one end of the electric power support return spring is in contact with or connected with the electric power guide element (14), and the other end of the electric power support return spring is in contact with or connected with an end cover of the automatic emergency brake booster of the vehicle.
10. A vehicle automatic emergency brake booster as set forth in claim 9, wherein:
the guide rail (262) is disposed on a side wall of a vehicle automatic emergency brake booster housing;
alternatively, the guide rail (262) is arranged on the upper bottom surface of the vehicle automatic emergency brake booster shell;
alternatively, the guide rail (262) is arranged on the lower bottom surface of the vehicle automatic emergency brake booster shell;
alternatively, the guide rail (262) is disposed in an installation space of the vehicle automatic emergency brake booster housing and passes through an upper bottom surface or a lower bottom surface of the vehicle automatic emergency brake booster housing.
11. A vehicle automatic emergency brake booster as set forth in claim 9, wherein:
the guide rail (262) is arranged on the upper bottom surface of the shell of the automatic emergency brake booster of the vehicle;
alternatively, the guide rail (262) is arranged on the lower bottom surface of the vehicle automatic emergency brake booster shell;
or the guide rail (262) is arranged in the installation space of the vehicle automatic emergency brake booster shell and penetrates through the upper bottom surface or the lower bottom surface of the vehicle automatic emergency brake booster shell;
the reset unit also comprises a pedal force bracket reset spring for resetting the pedal force bracket (13);
the pedal force support return spring and the electric power support return spring (33) are coaxially overlapped;
the pedal force support reset spring is arranged outside the guide rail (262), one end of the pedal force support reset spring is contacted with or connected with the pedal force guide element (15), and the other end of the pedal force support reset spring is contacted with or connected with an end cover of the automatic emergency brake booster of the vehicle;
the electric power support return spring is arranged in the guide rail (262), one end of the electric power support return spring is in contact with or connected with the electric power guide element (14), and the other end of the electric power support return spring is in contact with or connected with an end cover of the automatic emergency brake booster of the vehicle.
12. A vehicle automatic emergency brake booster according to claim 9, 10 or 11, wherein:
the automatic emergency brake booster for the vehicle further comprises a transmission component, a transmission gear nut (4) and an external thread (51) arranged on the outer side wall of the electric push rod (5);
the transmission gear nut (4) is composed of a nut (41) with internal threads and a transmission gear (42) with external transmission teeth, and the transmission gear (42) is arranged outside the nut (41);
the input gear of the transmission assembly is arranged on the motor output shaft of the automatic emergency brake booster of the vehicle, and the output gear of the transmission assembly is meshed with the transmission gear (42);
the transmission gear nut (4) is sleeved outside the electric push rod (5), the transmission gear nut (4) is connected with the thread of the external thread (51) through the internal thread of the screw nut (41), and drives the electric push rod (5) to move along the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911396189.XA CN111002957B (en) | 2019-12-30 | 2019-12-30 | Automatic emergency brake booster for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911396189.XA CN111002957B (en) | 2019-12-30 | 2019-12-30 | Automatic emergency brake booster for vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111002957A CN111002957A (en) | 2020-04-14 |
| CN111002957B true CN111002957B (en) | 2020-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911396189.XA Active CN111002957B (en) | 2019-12-30 | 2019-12-30 | Automatic emergency brake booster for vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN111002957B (en) |
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| CN102458940A (en) * | 2009-06-25 | 2012-05-16 | 罗伯特博世有限公司 | Braking system with electric brake booster |
| WO2013179746A1 (en) * | 2012-06-01 | 2013-12-05 | 日立オートモティブシステムズ株式会社 | Hydraulic pressure generation device |
| CN103707869A (en) * | 2012-09-28 | 2014-04-09 | 日立汽车系统株式会社 | Electric motor-driven booster |
| CN104321231A (en) * | 2012-04-20 | 2015-01-28 | 爱皮加特股份公司 | Bearing arrangement in an axial drive |
| CN105398440A (en) * | 2015-12-07 | 2016-03-16 | 宁波拓普智能刹车系统有限公司 | Mechanical, electric and magnetic integrated braking power assisting device |
| CN107949509A (en) * | 2015-09-14 | 2018-04-20 | 罗伯特·博世有限公司 | Electromechanical brake booster and braking system |
| CN108025728A (en) * | 2015-09-14 | 2018-05-11 | 罗伯特·博世有限公司 | Electromechanical brake booster and braking system |
| CN108025706A (en) * | 2015-09-14 | 2018-05-11 | 罗伯特·博世有限公司 | Supporting arrangement and electromechanical brake booster |
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2019
- 2019-12-30 CN CN201911396189.XA patent/CN111002957B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102458940A (en) * | 2009-06-25 | 2012-05-16 | 罗伯特博世有限公司 | Braking system with electric brake booster |
| CN104321231A (en) * | 2012-04-20 | 2015-01-28 | 爱皮加特股份公司 | Bearing arrangement in an axial drive |
| WO2013179746A1 (en) * | 2012-06-01 | 2013-12-05 | 日立オートモティブシステムズ株式会社 | Hydraulic pressure generation device |
| CN103707869A (en) * | 2012-09-28 | 2014-04-09 | 日立汽车系统株式会社 | Electric motor-driven booster |
| CN107949509A (en) * | 2015-09-14 | 2018-04-20 | 罗伯特·博世有限公司 | Electromechanical brake booster and braking system |
| CN108025728A (en) * | 2015-09-14 | 2018-05-11 | 罗伯特·博世有限公司 | Electromechanical brake booster and braking system |
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| CN105398440A (en) * | 2015-12-07 | 2016-03-16 | 宁波拓普智能刹车系统有限公司 | Mechanical, electric and magnetic integrated braking power assisting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111002957A (en) | 2020-04-14 |
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Denomination of invention: An automatic emergency brake booster for vehicle Effective date of registration: 20210622 Granted publication date: 20201002 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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Date of cancellation: 20220613 Granted publication date: 20201002 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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Denomination of invention: An automatic emergency brake booster for vehicles Effective date of registration: 20220621 Granted publication date: 20201002 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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Date of cancellation: 20230626 Granted publication date: 20201002 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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