CN114909416B - Dual-lead electronic braking system - Google Patents
Dual-lead electronic braking system Download PDFInfo
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- CN114909416B CN114909416B CN202210657770.8A CN202210657770A CN114909416B CN 114909416 B CN114909416 B CN 114909416B CN 202210657770 A CN202210657770 A CN 202210657770A CN 114909416 B CN114909416 B CN 114909416B
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- 230000005540 biological transmission Effects 0.000 claims description 27
- 230000009977 dual effect Effects 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 14
- 238000009434 installation Methods 0.000 abstract description 4
- 230000003137 locomotive effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/24—Electric or magnetic using motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
- F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
- F16D2125/40—Screw-and-nut
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/44—Mechanical mechanisms transmitting rotation
- F16D2125/46—Rotating members in mutual engagement
- F16D2125/50—Rotating members in mutual engagement with parallel non-stationary axes, e.g. planetary gearing
Abstract
The invention provides a dual-lead electronic brake system, which mainly solves the problems that the existing electronic brake system cannot realize larger braking force output, larger stroke and the like through smaller power input. The dual-lead electronic brake system comprises an input unit, a dual-lead rotary screw, an output unit and a switching unit; the double-lead rotary screw comprises a hollow shaft, and a first screw and a second screw which are arranged on the hollow shaft; the output unit comprises an output shaft and second threads arranged on the output shaft; the switching unit comprises a mandrel, a first check ring, a second check ring, a first thrust bearing, a second thrust bearing, a one-way bearing, a spring and a spring support seat; the first lead of the first lead screw is smaller than the second lead of the second lead screw. The dual-lead electronic brake system adopts a multi-layer concentric nested structure of the driving motor, the planet carrier component, the switching unit and the output shaft, can realize the flattening of the structure, and is further suitable for smaller installation space.
Description
Technical Field
The invention relates to the electromechanical power transmission technology, in particular to a double-lead electronic brake system.
Background
With the rapid development of automobile and rail locomotive technologies, the continuous increase of the traffic flow and the traffic flow density and the gradual increase of the speed of the automobile are carried out, the requirements on the safety and the reliability of the automobile and the locomotive are higher and higher, and whether an automobile and locomotive braking system can rapidly and effectively realize the braking intention of a driver and the unmanned automatic line control requirement in real time becomes a key problem affecting the road traffic safety.
The traditional hydraulic braking system is complex, the braking reaction speed is low, the volume is large, the difficulty in arrangement and assembly on the whole vehicle is large, the electric control system is complex, the manufacturing and maintenance costs are high, the electronic braking system is generated at the moment, the inherent defect of the hydraulic braking system is overcome, and the hydraulic braking system has the outstanding advantages of being simple in system, small in volume, high in braking reaction speed, high in efficiency and the like.
Currently, a common electronic braking system is used for combining slope transmission and thread transmission, and mainly converts rotary driving motion into translational driving motion to finally provide braking force so as to realize braking of a vehicle.
However, the power amplification transmission stroke of the slope transmission in the existing electronic brake system is limited, particularly, a stroke brake pad has larger size abrasion during locomotive braking, the structure is complex, the space occupation is more, and the electronic brake system cannot be suitable for vehicles with limited installation space and power of a brake device.
The screw rod and the nut adopted in the screw transmission are in threaded fit, so that the efficiency is low, and after a period of working, the screw thread is easy to wear, and the braking quality is affected. In addition, after the screw thread matched with the screw rod and the nut is worn, the gap between the screw rod and the nut is increased, and the working noise is increased.
Disclosure of Invention
The invention aims to provide a dual-lead electronic brake system, which mainly solves the technical problems that the existing electronic brake system cannot realize larger braking force output, larger stroke and the like through smaller power input.
The invention provides a double-lead electronic brake system, which is characterized in that: the device comprises an input unit, a double-lead rotary screw, an output unit and a switching unit;
the double-lead rotary screw comprises a hollow shaft, and a first screw and a second screw which are arranged on the hollow shaft; the input unit comprises a first planet carrier, an input shaft or an input gear arranged on the first planet carrier, a plurality of uniformly distributed first planet roll shafts arranged in the annular cavity of the first planet carrier, and a plurality of first planet rolls sleeved on the corresponding first planet roll shafts through bearings; the surface of the first planetary roller is provided with a first thread or a plurality of annular grooves; the input shaft or the input gear is connected with an external driving motor; the first planet carrier is sleeved outside the first lead screw through a bearing or directly; the plurality of first planetary rollers are respectively in threaded engagement with the first screw rod to form a first screw rod transmission mechanism;
the output unit comprises an output shaft and second threads arranged on the output shaft; the second screw thread is in meshed connection with the second screw thread to form a second screw transmission mechanism; or the output shaft is provided with a second planet carrier, and the second planet carrier is provided with a plurality of second planet roll shafts and second planet rolls sleeved on the corresponding second planet roll shafts; the second planetary roller and the first planetary roller have the same structure; or, the output shaft is provided with a second planet carrier and a cover plate, an integrated planet roll shaft is axially arranged between the second planet carrier and the cover plate, and the integrated planet roll shaft is directly arranged in the second planet carrier through a bearing or is fixed through the cover plate;
the switching unit comprises a mandrel, a first check ring, a second check ring, a first thrust bearing, a second thrust bearing, a one-way bearing, a spring and a spring supporting seat; the mandrel is arranged in the inner cavity of the hollow shaft; the first stop ring is arranged at the left end of the mandrel, and the second stop ring is arranged at the right end of the mandrel; the first thrust bearing is radially arranged between the first check ring and the first planet carrier; the second thrust bearing is radially arranged between the second check ring and the spring support seat; the unidirectional bearing is axially arranged between the mandrel and the spring support seat; the left end of the spring is abutted on the inner cavity of the hollow shaft, and the right end of the spring is abutted on the spring supporting seat;
the first lead A of the first lead screw is smaller than the second lead B of the second lead screw.
Further, the input shaft or the input gear is arranged on the outer ring of the first planet carrier and is coaxially arranged with the first planet carrier; the second screw rod is an external thread and is arranged on the right side of the first screw rod; or the second screw rod is an internal thread and is arranged on the right side of the first screw rod; or the second screw rod is an internal thread and is arranged in the first screw rod; the left end of the output shaft is a hollow cavity, and the right end of the mandrel is arranged in the hollow cavity.
Further, the spring support seat comprises a first annular surface, a first cylindrical surface, a second annular surface, a second cylindrical surface and a third annular surface which are sequentially connected; the second thrust bearing is arranged in a radial annular cavity surrounded by the second check ring, the mandrel, the second annular surface and the second cylindrical surface; the one-way bearing is arranged in an axial annular cavity surrounded by the second thrust bearing, the mandrel, the first annular surface and the first cylindrical surface; the right end of the spring is sleeved on the second annular surface and is abutted to the third annular surface.
Further, the first stop ring is sleeved at the left end of the mandrel through a collar for a shaft; and the second check ring is fixedly connected with the right end of the mandrel.
Further, the bearing between the first planetary roller and the first planetary roller shaft is a needle bearing; and at least one spacer disposed between the right end of the spring and the third annulus.
The invention also provides another double-lead electronic brake system, which is characterized in that: the device comprises an input unit, a double-lead rotary screw, an output unit and a switching unit;
the double-lead rotary screw comprises a hollow shaft, and a first screw and a second screw which are arranged on the hollow shaft;
the input unit comprises a first planet carrier, an input shaft arranged on the first planet carrier, a cover plate and an integrated planet roll shaft; the integrated planetary roller shaft is of a roller shaft integrated structure, is directly arranged on the first planetary frame through a bearing or is fixed through a cover plate; the surface of the integrated planetary roller shaft is provided with a first thread or a plurality of annular grooves; the input shaft is connected with an external driving motor; the first planet carrier is sleeved outside the first lead screw through a bearing or directly; the integrated planetary roller shaft is in meshed connection with the first screw thread or the groove to form a first screw transmission mechanism;
the output unit comprises an output shaft and second threads arranged on the output shaft; the second screw thread is in meshed connection with the second screw thread to form a second screw transmission mechanism; or the output shaft is provided with a second planet carrier, and the second planet carrier is provided with a plurality of second planet roll shafts and second planet rolls sleeved on the corresponding second planet roll shafts; the second planetary roller and the first planetary roller have the same structure; or, the output shaft is provided with a second planet carrier and a cover plate, an integrated planet roll shaft is axially arranged between the second planet carrier and the cover plate, and the integrated planet roll shaft is directly arranged in the second planet carrier through a bearing or is fixed through the cover plate;
the switching unit comprises a mandrel, a first check ring, a second check ring, a first thrust bearing, a second thrust bearing, a one-way bearing, a spring and a spring supporting seat; the mandrel is arranged in the inner cavity of the hollow shaft; the first stop ring is arranged at the left end of the mandrel, and the second stop ring is arranged at the right end of the mandrel; the first thrust bearing is radially arranged between the first check ring and the first planet carrier; the second thrust bearing is radially arranged between the second check ring and the spring support seat; the unidirectional bearing is axially arranged between the mandrel and the spring support seat; the left end of the spring is abutted on the inner cavity of the hollow shaft, and the right end of the spring is abutted on the spring supporting seat;
the first lead A of the first lead screw is smaller than the second lead B of the second lead screw.
Further, the input shaft or the input gear is arranged on the outer ring of the first planet carrier and is coaxially arranged with the first planet carrier;
the second screw rod is an external thread and is arranged on the right side of the first screw rod; or the second screw rod is an internal thread and is arranged on the right side of the first screw rod; or the second screw rod is an internal thread and is arranged in the first screw rod;
the left end of the output shaft is a hollow cavity, and the right end of the mandrel is arranged in the hollow cavity.
Further, the spring support seat comprises a first annular surface, a first cylindrical surface, a second annular surface, a second cylindrical surface and a third annular surface which are sequentially connected; the second thrust bearing is arranged in a radial annular cavity surrounded by the second check ring, the mandrel, the second annular surface and the second cylindrical surface; the one-way bearing is arranged in an axial annular cavity surrounded by the second thrust bearing, the mandrel, the first annular surface and the first cylindrical surface; the right end of the spring is sleeved on the second annular surface and is abutted to the third annular surface.
Further, the first stop ring is sleeved at the left end of the mandrel through a collar for a shaft; and the second check ring is fixedly connected with the right end of the mandrel.
Further, the integrated planetary roller shaft is arranged on the first planet carrier through a needle bearing or directly; and at least one spacer disposed between the right end of the spring and the third annulus.
The beneficial effects of the invention are as follows:
1. according to the double-lead electronic brake system, the double-lead structure with the combination of the first lead screw transmission mechanism and the second lead screw transmission mechanism is adopted, the second lead B works firstly, and as the lead of the second lead is larger, the rapid propulsion of an output shaft can be realized, the rapid brake is realized, and the brake response time is improved; and then the first lead A is entered, and although the first lead is small, the propelling speed of the output shaft is low, the output torque of the rear braking section can be increased, and the rapid and large-torque braking can be realized.
2. The dual-lead electronic brake system adopts a multi-layer concentric nested structure of the driving motor, the planet carrier component, the switching unit and the output shaft, can realize the flattening of the structure, and is further suitable for smaller installation space.
3. The dual-lead electronic brake system adopts a lead screw transmission (particularly a planetary roller screw) structure, and has the advantages of small volume, large transmission load, impact resistance, long service life and simpler processing and maintenance.
Drawings
Figures 1-3 are schematic views of a dual lead electric brake system according to various embodiments of the present invention.
Fig. 4 to 6 are schematic views illustrating two different operating states of the dual-lead electric brake system according to the embodiment of the present invention.
Figures 7-12 are schematic views of a third embodiment of a dual lead electric brake system according to the present invention.
Figures 13-18 are schematic views of four different operating conditions of a dual lead electric brake system according to an embodiment of the present invention.
Figures 19-20 are schematic views of five different operating conditions of a dual lead electric brake system according to embodiments of the present invention.
The reference numerals are as follows:
1-input units, 11-first planet carriers, 12-input shafts, 13-first planet roll shafts, 14-first planet rolls, 15-first threads, 16-integrated planet roll shafts and 17-cover plates;
2-double-lead rotary screw rod, 21-hollow shaft, 22-first screw rod and 23-second screw rod;
3-output units, 31-output shafts, 32-second threads, 33-second planetary roller shafts, 34-second planetary rollers and 35-second planetary carriers;
the device comprises a 4-switching unit, a 41-mandrel, a 42-first check ring, a 43-second check ring, a 44-first thrust bearing, a 45-second thrust bearing, a 46-one-way bearing, a 47-spring, a 48-spring support seat, a 481-first annular surface, a 482-first cylindrical surface, a 483-second annular surface, a 484-second cylindrical surface, a 485-third annular surface, a 49-shaft clamping ring and a 50-gasket;
a-first lead, B-second lead.
Detailed Description
To further clarify the objects, advantages and features of the present invention, a further detailed description of a dual lead electric brake system according to the present invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. The drawings are in simplified form and are not to scale, merely for convenience and clarity of understanding, and are not to be construed as an indication or suggestion of relative importance, as the terms "first", "second", "third", etc. are used herein for descriptive purposes only and are not to be construed as limiting or implying any particular importance.
Example 1
As shown in fig. 1 to 3, the present invention provides a dual lead electric brake system including an input unit 1, a dual lead rotary screw 2, an output unit 3, and a switching unit 4.
The input unit 1 comprises a first planet carrier 11, an input shaft 12 or an input gear arranged on the first planet carrier 11, a plurality of uniformly distributed first planet roll shafts 13 arranged in an inner annular cavity of the first planet carrier 11, and a plurality of first planet rolls 14 sleeved on the corresponding first planet roll shafts 13 through bearings, wherein bearings between the first planet rolls 14 and the first planet roll shafts 13 are needle bearings. The surface of the first planetary roller 14 is provided with a first thread 15 or a plurality of annular grooves; the input shaft 12 or the input gear is arranged on the outer ring of the first planet carrier 11 or the input shaft 12 is arranged coaxially with the first planet carrier 11, the input shaft 12 or the input gear is connected with an external driving motor (not shown in the figure), and the driving motor drives the system to transmit power.
The dual lead rotary screw 2 comprises a hollow shaft 21, and a first screw 22 and a second screw 23 arranged on the hollow shaft 21. The hollow shaft 21 is of a step structure, the second screw rod 23 is arranged on the right side of the first screw rod 22, and external threads are arranged on the second screw rod 23. The first planet carrier 11 is sleeved outside the first lead screw 22 through a bearing or directly; the plurality of first planetary rollers 14 are respectively engaged with the first screw 22 in a threaded or grooved manner to form a first screw drive mechanism.
As shown in fig. 1 and 3, the output unit 3 includes an output shaft 31 and a second thread 32 disposed on the output shaft 31, the second thread 32 is an internal thread, and the internal thread on the second thread 32 is connected with an external thread on the second screw 23 to form a second screw transmission mechanism. The first lead a of the first lead screw 22 is smaller than the second lead B of the second lead screw 23.
As shown in fig. 1, the switching unit 4 includes a spindle 41, a first stopper ring 42, a second stopper ring 43, a first thrust bearing 44, a second thrust bearing 45, a one-way bearing 46, a spring 47, and a spring support 48. The left end of the output shaft 31 is a hollow cavity, and the mandrel 41 is arranged in the hollow cavity; the first check ring 42 is sleeved at the left end of the mandrel 41 through a shaft collar 49, and the second check ring 43 is arranged at the right end of the mandrel 41 and fixedly connected with the right end of the mandrel 41; the first thrust bearing 44 is radially disposed between the first check ring 42 and the first carrier 11; the second thrust bearing 45 is radially disposed between the second stop ring 43 and the spring support 48; a one-way bearing 46 is axially disposed between the spindle 41 and a spring support 48.
Referring to fig. 1 and 2, the left end of the spring 47 is abutted against a step surface of the step structure of the hollow shaft 21, and the right end thereof is abutted against the spring support seat 48; the spring support 48 includes a first annular surface 481, a first cylindrical surface 482, a second annular surface 483, a second cylindrical surface 484, and a third annular surface 485 connected in sequence; the second thrust bearing 45 is arranged in a radial annular cavity surrounded by the second check ring 43, the mandrel 41, the second annular surface 483 and the second cylindrical surface 484; the one-way bearing 446 is arranged in an axial annular cavity surrounded by the second thrust bearing 45, the mandrel 41, the first annular surface 483 and the first cylindrical surface 482; the right end of the spring 47 is sleeved on the second cylinder surface 484 and is abutted to the third cylinder surface 485, and a gasket 50 is further arranged between the right end of the spring 47 and the third cylinder surface 485, so that the braking speed and the braking force can be switched by the pre-set spring pre-tightening force in the braking process, and further the braking efficiency is improved.
With reference to fig. 1, 2 and 3, the working process of the dual-lead electric brake system of the present embodiment is as follows:
when the vehicle needs to be braked in the running process, a brake command is started by wire control or a driver presses a brake pedal, at the moment, a driving motor connected with the system drives a first planet carrier 11 to rotate through an input shaft 12, then the first planet carrier 11 drives a first lead screw 22 and a second lead screw 23 to rotate together, and because the second lead screw 23 is in threaded connection with an output shaft 31, the output shaft 31 moves rightwards relative to the first lead screw 22 and the second lead screw 23, and as the brake torque increases, the transmission of a larger lead and smaller brake torque is stopped between the second lead screw 23 and the output shaft 31, and then the transmission of the smaller lead and larger brake torque of the first lead screw 22 (high efficiency of planetary roller lead screws) is shifted.
When the brake pedal is released by the driver or the brake pedal is released by the brake-by-wire command, the spring 47 gradually returns to the pre-tightening normal state from the compressed state, and in the return stroke of the restoring, the first screw rod 22 moves leftwards along the axial direction under the action of the one-way bearing 46, the first thrust bearing 44 and the second thrust bearing 45, at this time, the first planetary roller 14 and the first screw rod 22 are in threaded transmission again, the first planetary roller 14 provides leftwards acting force for the first screw rod 22, and when the spring force is reduced to the pre-tightening force value of the spring, the first screw rod 22 stops the transmission of the larger braking moment with smaller lead, and then shifts to the transmission of the smaller braking moment with larger lead of the second screw rod 23 until the braking is finished.
Example two
As shown in fig. 4 to 6, the present invention provides another dual-lead electric brake system, which is different from the first embodiment in that an input unit 1 of the dual-lead electric brake system of the present embodiment includes a first carrier 11, an input shaft 12 or an input gear provided on the first carrier 11, a cover plate 17, and an integrated planetary roller shaft 16; the integrated planetary roller shaft 16 is of a roller shaft integrated structure, is directly arranged on the first planet carrier 11 through a bearing or is fixed through a cover plate 17; the surface of the integrated planetary roller shaft 16 is provided with a first thread 15 or a plurality of annular grooves; the input shaft 12 or input gear is connected to an external drive motor (not shown) which drives the system for power transmission. The first planet carrier 11 is sleeved outside the first lead screw 22 through a bearing or directly; the integrated planetary roller shaft 16 is in threaded or grooved engagement with the first lead screw 22 to form a first lead screw transmission mechanism.
Example III
As shown in fig. 7 to 12, the present embodiment is different from the first and second embodiments in that the second screw rod 23 of the present embodiment is provided on the right side of the first screw rod 22, and the second screw rod 23 is provided with an internal thread; the output unit 3 comprises an output shaft 31 and a second thread 32 arranged on the output shaft 31, the second thread 32 is an external thread, the external thread on the second thread 32 is connected with the internal thread on the second screw rod 23 to form a second screw rod transmission mechanism, and a design idea is provided according to different adaptation scenes.
Example IV
As shown in fig. 13 to 18, the difference between the present embodiment and the first and second embodiments is that the second screw rod 23 of the present embodiment is disposed in the first screw rod 22 and is screwed with the output shaft 31, and this design can shorten the axial length of the brake system, so that the present embodiment is suitable for use in a vehicle in which the installation space of the brake system is limited.
Example five
As shown in fig. 19 to 20, the present embodiment is different from the first to fourth embodiments in that a second carrier 35 is provided on an output shaft 31 of the present embodiment, and a plurality of second planetary roller shafts 33 and second planetary rollers 34 sleeved on the respective second planetary roller shafts 33 are provided on the second carrier 35; the second planetary roller 34 has the same structure as the first planetary roller 14, and the surface of the second planetary roller 34 is provided with threads or annular grooves; the second threaded spindle 23 is in threaded engagement with a plurality of second planetary rollers 34.
As another preferable scheme, the output shaft 31 is provided with a second planet carrier 35 and a cover plate 17, an integrated planet roll shaft 16 is axially arranged between the second planet carrier 35 and the cover plate 17, and the integrated planet roll shaft 16 is arranged in the second planet carrier 35 through a bearing or directly and is fixed through the cover plate 17.
In this embodiment, the second planetary roller 34 is combined with the double planetary roller arrangement of the first planetary roller 14, so that the braking efficiency of the automobile can be greatly improved, and meanwhile, the power of the driving motor is reduced, so that the planetary roller can be widely applied to various fields such as buses and heavy trucks, especially rail transit.
Claims (10)
1. A dual lead electric brake system, characterized by: comprises an input unit (1), a double-lead rotary screw (2), an output unit (3) and a switching unit (4);
the double-lead rotary screw (2) comprises a hollow shaft (21), and a first screw (22) and a second screw (23) which are arranged on the hollow shaft (21);
the input unit (1) comprises a first planet carrier (11), an input shaft (12) or an input gear arranged on the first planet carrier (11), a plurality of uniformly distributed first planet roll shafts (13) arranged in the annular cavity of the first planet carrier (11), and a plurality of first planet rolls (14) sleeved on the corresponding first planet roll shafts (13) through bearings; the surface of the first planetary roller (14) is provided with a first thread (15) or a plurality of annular grooves; the input shaft (12) or the input gear is connected with an external driving motor; the first planet carrier (11) is sleeved outside the first lead screw (22) through a bearing or directly; the plurality of first planet rollers (14) are respectively in threaded engagement with the first screw rod (22) to form a first screw rod transmission mechanism;
the output unit (3) comprises an output shaft (31) and a second thread (32) arranged on the output shaft (31); the second screw thread (32) is in threaded engagement with the second screw rod (23) to form a second screw rod transmission mechanism; or, a second planet carrier (35) is arranged on the output shaft (31), and a plurality of second planet roll shafts (33) and second planet rolls (34) sleeved on the corresponding second planet roll shafts (33) are arranged on the second planet carrier (35); the second planetary roller (34) has the same structure as the first planetary roller (14); or, the output shaft (31) is provided with a second planet carrier (35) and a cover plate (17), an integrated planet roll shaft (16) is axially arranged between the second planet carrier (35) and the cover plate (17), and the integrated planet roll shaft (16) is directly arranged in the second planet carrier (35) through a bearing or is fixed through the cover plate (17);
the switching unit (4) comprises a mandrel (41), a first check ring (42), a second check ring (43), a first thrust bearing (44), a second thrust bearing (45), a one-way bearing (46), a spring (47) and a spring support seat (48); the mandrel (41) is arranged in the inner cavity of the hollow shaft (21); the first check ring (42) is arranged at the left end of the mandrel (41), and the second check ring (43) is arranged at the right end of the mandrel (41); the first thrust bearing (44) is arranged between the first check ring (42) and the first planet carrier (11) in the radial direction; the second thrust bearing (45) is arranged between the second check ring (43) and the spring supporting seat (48) in the radial direction; the one-way bearing (46) is axially arranged between the mandrel (41) and the spring support seat (48); the left end of the spring (47) is abutted on the inner cavity of the hollow shaft (21), and the right end of the spring is abutted on the spring supporting seat (48);
the first lead (A) of the first lead screw (22) is smaller than the second lead (B) of the second lead screw.
2. A dual lead electric brake system as defined in claim 1, wherein: the input shaft (12) or the input gear is arranged on the outer ring of the first planet carrier (11) and is coaxially arranged with the first planet carrier (11);
the second lead screw (23) is an external thread and is arranged on the right side of the first lead screw (22); or the second screw rod (23) is an internal thread and is arranged on the right side of the first screw rod (22); or the second screw rod (23) is an internal thread and is arranged in the first screw rod (22);
the left end of the output shaft (31) is a hollow cavity, and the right end of the mandrel (41) is arranged in the hollow cavity.
3. A dual lead electric brake system as claimed in claim 1 or 2, wherein: the spring support seat (48) comprises a first annular surface (481), a first cylindrical surface (482), a second annular surface (483), a second cylindrical surface (484) and a third annular surface (485) which are sequentially connected; the second thrust bearing (45) is arranged in a radial annular cavity surrounded by the second check ring (43), the mandrel (41), the second annular surface (483) and the second column surface (484); the one-way bearing (46) is arranged in an axial annular cavity surrounded by the second thrust bearing (45), the mandrel (41), the first annular surface (481) and the first cylindrical surface (482); the right end of the spring (47) is sleeved on the second column surface (484) and is abutted to the third annular surface (485).
4. A dual lead electric brake system as defined in claim 3, wherein: the first check ring (42) is sleeved at the left end of the mandrel (41) through a shaft clamping ring (49); the second check ring (43) is fixedly connected with the right end of the mandrel (41).
5. A dual lead electric brake system as defined in claim 4, wherein: the bearing between the first planetary roller (14) and the first planetary roller shaft (13) is a needle bearing;
and at least one gasket (50) arranged between the right end of the spring (47) and the third annular surface (485).
6. A dual lead electric brake system, characterized by: comprises an input unit (1), a double-lead rotary screw (2), an output unit (3) and a switching unit (4);
the double-lead rotary screw (2) comprises a hollow shaft (21), and a first screw (22) and a second screw (23) which are arranged on the hollow shaft (21);
the input unit (1) comprises a first planet carrier (11), an input shaft (12) or an input gear arranged on the first planet carrier (11), a cover plate (17) and an integrated planetary roller shaft (16); the integrated planetary roller shaft (16) is of a roller shaft integrated structure, is directly arranged on the first planet carrier (11) through a bearing or is fixed through a cover plate (17); the surface of the integrated planetary roller shaft (16) is provided with a first thread (15) or a plurality of annular grooves; the input shaft (12) or the input gear is connected with an external driving motor; the first planet carrier (11) is sleeved outside the first lead screw (22) through a bearing or directly; the integrated planetary roller shaft (16) is in threaded engagement with the first screw rod (22) to form a first screw rod transmission mechanism;
the output unit (3) comprises an output shaft (31) and a second thread (32) arranged on the output shaft (31); the second screw thread (32) is in threaded engagement with the second screw rod to form a second screw rod transmission mechanism; or, a second planet carrier (35) is arranged on the output shaft (31), and a plurality of second planet roll shafts (33) and second planet rolls (34) sleeved on the corresponding second planet roll shafts (33) are arranged on the second planet carrier (35); the second planetary roller (34) has the same structure as the first planetary roller (14); or, the output shaft (31) is provided with a second planet carrier (35) and a cover plate (17), an integrated planet roll shaft (16) is axially arranged between the second planet carrier (35) and the cover plate (17), and the integrated planet roll shaft (16) is directly arranged in the second planet carrier (35) through a bearing or is fixed through the cover plate (17);
the switching unit (4) comprises a mandrel (41), a first check ring (42), a second check ring (43), a first thrust bearing (44), a second thrust bearing (45), a one-way bearing (46), a spring (47) and a spring support seat (48); the mandrel (41) is arranged in the inner cavity of the hollow shaft (21); the first check ring (42) is arranged at the left end of the mandrel (41), and the second check ring (43) is arranged at the right end of the mandrel (41); the first thrust bearing (44) is arranged between the first check ring (42) and the first planet carrier (11) in the radial direction; the second thrust bearing (45) is arranged between the second check ring (43) and the spring supporting seat (48) in the radial direction; the one-way bearing (46) is axially arranged between the mandrel (41) and the spring support seat (48); the left end of the spring (47) is abutted on the inner cavity of the hollow shaft (21), and the right end of the spring is abutted on the spring supporting seat (48);
the first lead (A) of the first lead screw (22) is smaller than the second lead (B) of the second lead screw.
7. A dual lead electric brake system as defined in claim 6, wherein: the input shaft (12) or the input gear is arranged on the outer ring of the first planet carrier (11) and is coaxially arranged with the first planet carrier (11);
the second lead screw (23) is an external thread and is arranged on the right side of the first lead screw (22); or the second screw rod (23) is an internal thread and is arranged on the right side of the first screw rod (22); or the second screw rod (23) is an internal thread and is arranged in the first screw rod (22);
the left end of the output shaft (31) is a hollow cavity, and the right end of the mandrel (41) is arranged in the hollow cavity.
8. A dual lead electric brake system as defined in claim 6 or 7, wherein: the spring support seat (48) comprises a first annular surface (481), a first cylindrical surface (482), a second annular surface (483), a second cylindrical surface (484) and a third annular surface (485) which are sequentially connected; the second thrust bearing (45) is arranged in a radial annular cavity surrounded by the second check ring (43), the mandrel (41), the second annular surface (483) and the second column surface (484); the one-way bearing (46) is arranged in an axial annular cavity surrounded by the second thrust bearing (45), the mandrel (41), the first annular surface (481) and the first cylindrical surface (482); the right end of the spring (47) is sleeved on the second column surface (484) and is abutted to the third annular surface (485).
9. A dual lead electric brake system as defined in claim 8, wherein: the first check ring (42) is sleeved at the left end of the mandrel (41) through a shaft clamping ring (49); the second check ring (43) is fixedly connected with the right end of the mandrel (41).
10. A dual lead electric brake system as defined in claim 9, wherein: the integrated planetary roller shaft (16) is arranged on the first planet carrier (11) through a needle bearing or directly;
and at least one gasket (50) arranged between the right end of the spring (47) and the third annular surface (485).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210657770.8A CN114909416B (en) | 2022-06-10 | 2022-06-10 | Dual-lead electronic braking system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210657770.8A CN114909416B (en) | 2022-06-10 | 2022-06-10 | Dual-lead electronic braking system |
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| Publication Number | Publication Date |
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| CN114909416A CN114909416A (en) | 2022-08-16 |
| CN114909416B true CN114909416B (en) | 2024-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210657770.8A Active CN114909416B (en) | 2022-06-10 | 2022-06-10 | Dual-lead electronic braking system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017160981A (en) * | 2016-03-09 | 2017-09-14 | Ntn株式会社 | Planetary roller screw type linear motion mechanism and electrically-driven brake control system |
| CN113531016A (en) * | 2021-07-29 | 2021-10-22 | 陕西国力信息技术有限公司 | Electric brake device for vehicle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090064220A (en) * | 2007-12-15 | 2009-06-18 | 현대자동차주식회사 | Reducing apparatus for vehicle and electronic parking brake with the reducing apparatus and electronic motor brake with the reducing apparatus |
-
2022
- 2022-06-10 CN CN202210657770.8A patent/CN114909416B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017160981A (en) * | 2016-03-09 | 2017-09-14 | Ntn株式会社 | Planetary roller screw type linear motion mechanism and electrically-driven brake control system |
| CN113531016A (en) * | 2021-07-29 | 2021-10-22 | 陕西国力信息技术有限公司 | Electric brake device for vehicle |
Non-Patent Citations (1)
| Title |
|---|
| 精密行星滚柱丝杠的传动特性;李凯;叶佩青;周晓尧;徐强;;光学精密工程;20160815(第08期);87-95 * |
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| CN114909416A (en) | 2022-08-16 |
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