CN208778549U - A kind of electromechanical brake - Google Patents
A kind of electromechanical brake Download PDFInfo
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- CN208778549U CN208778549U CN201821425251.4U CN201821425251U CN208778549U CN 208778549 U CN208778549 U CN 208778549U CN 201821425251 U CN201821425251 U CN 201821425251U CN 208778549 U CN208778549 U CN 208778549U
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- screw rod
- electromechanical brake
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Abstract
The utility model discloses a kind of electromechanical brakes, belong to automobile brake technical field.It include: shell, the side of shell is provided with a clamp, and clamp include two relatively-movable claws, and two claws are respectively arranged with a friction plate, and two friction plates are facing each other, and the other side of shell offers a perforative cylinder holes；Ball screw structure, ball screw structure is arranged in cylinder holes, ball screw structure includes screw rod, nut and several steel balls, one end of screw rod is pierced by cylinder holes and connect with actuator driven, nut can movably be set in the lateral wall of screw rod along spiro rod length direction, it is provided with two clamping platforms on the outside of nut, and is provided with several steel balls between nut and screw rod；Piston, piston are arranged in cylinder holes, and one end of piston is connect with a claw, and the other end of piston can movably be contacted with nut along spiro rod length direction.A kind of electromechanical brake provided by the utility model, structure simplify, reduce overall volume, improve braking efficiency.
Description
Technical field
The utility model relates to automobile brake technical fields, are specifically related to a kind of electromechanical brake.
Background technique
Currently with the development of kinds of automobile, such as the hybrid vehicle, the electric car that have already appeared on the market now
Deng, however brake system of car still uses traditional hydraulic brake technology.Although brake fluid system is very mature, reliability
Also higher, but its hydraulic system pipeline is complicated, vacuum booster can also occupy sizable volume, not only the assembly of pipeline arrangement
Difficulty is big, and for the electric car for pursuing cruising ability, the brake fluid system for occupying more spaces is even more one
Biggish trouble.Simultaneously hydraulic system itself there is also brake fluid leakage, pollution the defects of.
Using electromechanical brake (EMB) the then very good solution problem above of line traffic control.Electronic mechanical braking
Device uses electric energy for the energy, by electric wire transmit electric energy, by signal wire transmit action signal, can efficiently, be accurately controlled system
The completion of movement, greatly improves the safety of brake system of car, structure is simple, and space hold is small, preferably full
The demand of foot hybrid vehicle, electric car.
It is based on the demand in market, has occurred the electromechanical brake of a variety of patterns at present.Wherein Patent No.
A electromechanical brake of the U.S. Patent application of US6158558, the electromechanical brake of this structure will be electric
The parts such as machine, gear are put into brake casing, are not required to additional actuator, but its structure is relative complex, brake
Volume is also larger.Current existing electronic mechanical brake assembly design, or since structure is complicated, or since volume is big, or
It is since manufacture assembly difficulty is big, most of design scheme, which fails, to be applied in real life.
Utility model content
For the above-mentioned problems in the prior art, it is desirable to provide a kind of electromechanical brake, to simplify electronics
The structure of mechanical brake reduces the volume of electromechanical brake.
Specific technical solution is as follows:
A kind of electromechanical brake, comprising:
Shell, the side of shell are provided with a clamp, and clamp include two relatively-movable claws, and two claws are set respectively
It is equipped with a friction plate, and two friction plates are facing each other, a brake disc is provided between two friction plates, the other side of shell offers
One perforative cylinder holes；
Ball screw structure, ball screw structure are arranged in cylinder holes, if ball screw structure include screw rod, nut and
Dry steel ball, one end of screw rod are pierced by cylinder holes and connect with actuator driven, and lateral wall of the screw rod close to one end of actuator is provided with
One thrust platform is provided with thrust bearing and plain washer between thrust platform right side and the inner left wall of cylinder holes, and nut can be along spiral shell
Pole length direction is movably set in the lateral wall of screw rod, two clamping platforms is provided on the outside of nut, and between nut and screw rod
It is provided with several steel balls；
Piston, piston are arranged in cylinder holes, and one end of piston is connect with a claw, and the other end of piston can be along spiro rod length
Direction is movably contacted with nut, and piston offers a mounting hole, and the outer profile of mounting hole and nut matches, piston it is outer
A piston seal is provided between side and cylinder holes.
It in a kind of above-mentioned electromechanical brake, also has the feature that, one end and the actuator of screw rod pass through
Spline connection.
It in a kind of above-mentioned electromechanical brake, also has the feature that, thrust platform is installed in the outer of screw rod
Side wall or thrust platform are releasably set in the lateral wall of screw rod；Thrust platform is provided with rotation stop on the side of nut
Boss, nut are provided with limiting groove close to the side of thrust platform, and limiting groove matches with rotation stop boss.
In a kind of above-mentioned electromechanical brake, also have the feature that, actuator by threaded fastener with
The other side of shell connects, and a retaining ring is provided between actuator and shell.
It in a kind of above-mentioned electromechanical brake, also has the feature that, an end cap of the screw rod close to actuator
Equipped with a needle bearing；Or screw rod is arranged with sliding bearing close to one end of actuator；Or screw rod is close to an end cap of actuator
Equipped with bushing.
It in a kind of above-mentioned electromechanical brake, also has the feature that, mounting hole setting in the shape of a " convex ", pacifies
Dress hole is set in the outside of screw rod and nut.
It in a kind of above-mentioned electromechanical brake, also has the feature that, the both ends of nut are provided with two compressions
Spring, two holddown springs are embedded the internal screw thread at nut both ends, and one end of two holddown springs is contacted with several steel balls respectively.
It in a kind of above-mentioned electromechanical brake, also has the feature that, close to one end of piston on the inside of cylinder holes
A seal groove is offered, piston seal is embedded in seal groove；Piston seal is rectangular seal or piston seal is
Cylindrical seal circle.
It in a kind of above-mentioned electromechanical brake, also has the feature that, mistake on the outside of piston seal and piston
It is full of cooperation, piston and cylinder holes inner wall clearance fit.
It in a kind of above-mentioned electromechanical brake, also has the feature that, screw flight length is longer than nut
Reach.
The good effect of above-mentioned technical proposal is:
1. the electromechanical brake eliminates hydraulic system compared to previous traditional brake, thus eliminate into
Oilhole and vent valve, thereby reduce processing cost and assembly cost；
2. and the alternative electric parking brake of the electromechanical brake carries out parking braking, compared to electronic parking
The improved efficiency 40% of brake；
3. the actuator in the electromechanical brake is placed outside detent housing, inside using ball screw structure and
Piston simplifies the structure of enclosure interior, reduces overall volume；
4. the anti-relative rotation setting between nut and piston and the anti-relative rotation setting between nut and screw rod, mention
The high braking efficiency of brake entirety, braking reliability height.
5. the thrust mechanism that the limiting groove on the rotation stop boss of screw rod thrust platform bottom and nut is constituted, effectively prevents
Thread pressure caused by when only nut is retracted into thrust platform bottom is excessive and thrust platform bears excessive pressure causes to wear
The problem of.
6. screw rod, can in the case where guaranteeing enough clamping forces using on optical axis plus circlip is come by the way of being limited
It reduces because opening jump-ring slot due to bring cost.
7. using punching press outer circle needle bearing can effectively lifting handle surface fatigue life, promote ball screw framework
Transmission efficiency.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the embodiment of electromechanical brake of the utility model；
Fig. 2 is that the cross-section structure of nut and piston shows in a kind of embodiment of electromechanical brake of the utility model
It is intended to；
Fig. 3 is the structural schematic diagram of screw rod in a kind of embodiment of electromechanical brake of the utility model；
Fig. 4 is the structural schematic diagram of nut in a kind of embodiment of electromechanical brake of the utility model；
Fig. 5 is the knot of screw rod and nut rotation preventive mechanism in a kind of embodiment of electromechanical brake of the utility model
Structure schematic diagram；
Fig. 6 is the structure of punching press outer circle needle bearing in a kind of embodiment of electromechanical brake of the utility model
Schematic diagram.
In attached drawing: 1, actuator；2, retaining ring；3, needle bearing；4, plain washer；5, thrust bearing；6, screw rod；61, rotation stop
Boss；7, steel ball；8, nut；81, limiting groove；9, piston seal；10, piston；11, inner attrition piece；12, outside friction disc；
13, shell.
Specific embodiment
In order to be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, with
Lower embodiment combination attached drawing 1 is specifically addressed a kind of electromechanical brake provided by the utility model to attached drawing 6.
Fig. 1 is a kind of structural schematic diagram of the embodiment of electromechanical brake of the utility model, and Fig. 2 is that this is practical
The schematic diagram of the section structure of nut and piston in a kind of embodiment of novel electromechanical brake, Fig. 3 are that this is practical new
The structural schematic diagram of screw rod in a kind of embodiment of electromechanical brake of type, Fig. 4 are a kind of electronics of the utility model
The structural schematic diagram of nut in the embodiment of mechanical brake, Fig. 5 are a kind of electromechanical brake of the utility model
Embodiment in screw rod and nut rotation preventive mechanism structural schematic diagram, Fig. 6 be the utility model a kind of electronic mechanical brake
The structural schematic diagram of punching press outer circle needle bearing in the embodiment of device.In the present embodiment, the electromechanical brake is main
Including actuator 1, retaining ring 2, needle bearing 3, plain washer 4, thrust bearing 5, screw rod 6, rotation stop boss 61, steel ball 7, nut 8, limit
Position groove 81, piston seal 9, piston 10, inner attrition piece 11, outside friction disc 12, shell 13.
The side of shell 13 is provided with a clamp, and clamp include two relatively-movable claws, and two claws are respectively set
There is a friction plate, and two friction plates are facing each other, wherein the friction plate close to piston 10 is inner attrition piece 11, away from piston 10
Friction plate is outside friction disc 12, is provided with a brake disc between inner attrition piece 11 and outside friction disc 12, inner attrition piece 11 and is rubbed outside
Pad 12 can relatively move clamping brake disc, and the other side of shell 13 offers a perforative cylinder holes.
Ball screw structure is arranged in cylinder holes, and ball screw structure includes screw rod 6, nut 8 and several steel balls 7, spiral shell
One end of bar 6 is pierced by cylinder holes and actuator 1 is drivingly connected, and lateral wall of the screw rod 6 close to one end of actuator 1 is provided with a thrust
Platform is provided with thrust bearing 5 and plain washer 4 between thrust platform right side and the inner left wall of cylinder holes, and thrust bearing 5 can improve
The transmission efficiency of ball screw arrangement simultaneously carries out radial limit to screw rod 6, and nut 8 can be movably arranged along 6 length direction of screw rod
In the lateral wall of screw rod 6, the outside of nut 8 is provided with two clamping platforms, and several steel balls 7 are provided between nut 8 and screw rod 6.
Piston 10 is arranged in cylinder holes, and one end of piston 10 is connect with a claw, and the other end of piston 10 can be long along screw rod 6
Degree direction is movably contacted with nut 8, and piston 10 offers a mounting hole, and the outer profile of mounting hole and nut 8 matches, from
And nut 8 is limited relative to the rotation of screw rod 6, to improve the mobile efficiency of nut 8, it is arranged between the outside and cylinder holes of piston 10
There is a piston seal 9.
In a preferred embodiment, it as shown in Figure 1, one end of screw rod 6 is connect with actuator 1 by spline, holds
1 output torque of row device directly drives screw rod 6 to rotate.
In a preferred embodiment, as shown in Figure 1 and Figure 5, thrust platform is installed in the lateral wall of screw rod 6, or
Thrust platform is releasably set in the lateral wall of screw rod 6, and the detachable design of thrust platform can be by requirement on machining accuracy height
Screw rod 6 and the relatively low thrust platform of requirement on machining accuracy split processing, processing cost and process time can be saved；It pushes away
Power platform is provided with rotation stop boss 61 on the side of nut, and referring to Fig. 3, nut 8 is provided with close to the side of thrust platform
Limiting groove 81, referring to fig. 4, limiting groove 81 match with rotation stop boss 61, and limiting groove 81 is for limiting rotation stop boss 61
Displacement.
In a preferred embodiment, as shown in Figure 1, actuator 1 passes through the another of threaded fastener and shell 13
Side connection, the outside that actuator 1 is arranged in shell 13 reduces the inner space of shell 13, keeps the installation of entire caliper simpler
It is single, and a retaining ring 2 is provided between actuator 1 and shell 13, retaining ring 2 limits the axial movement of screw rod 6.
In a preferred embodiment, as shown in figures 1 to 6, screw rod 6 is arranged with one close to one end of actuator 1
Needle bearing 3, needle bearing 3 can improve the service life and transmission efficiency of screw rod 6, and needle bearing 3 limits screw rod 6
Radial motion；Or screw rod 6 is arranged with sliding bearing close to one end of actuator 1；Or screw rod 6 is arranged close to one end of actuator 1
There is bushing, the advantages of wherein bushing inner ring is coated with wear-resistant material, sliding bearing and bushing is that manufacturing cost is lower, and due to rolling
Ballscrew revolving speed is not high, and sliding bearing and bushing can reach and lubricant effect similar in needle bearing.
In a preferred embodiment, as shown in Figure 1, mounting hole setting in the shape of a " convex ", mounting hole are set in spiral shell
The outside of bar 6 and nut 8, the rotation of screw rod 6 drives the movement of nut 8, so that nut 8 pushes the movement of piston 10.
In a preferred embodiment, as shown in Figure 1, the both ends of nut 8 are provided with two holddown springs, two compress bullet
Spring is embedded the internal screw thread at 8 both ends of nut, and one end of two holddown springs is contacted with several steel balls 7 respectively, and steel ball 7 and spring are handed over
It is located at the steel ball 7 at middle part by being compressed with the holddown spring of two sides for the structure used.The advantages of such structure, is steel ball 7
Required precision is high, and technology difficulty is big, with high costs, and the use of steel ball 7 can be reduced in such a way that steel ball 7 and spring are used alternatingly
Quantity saves cost；Since holddown spring compresses steel ball 7, so the collision between steel ball 7 can be reduced, ball screw framework fortune
Overall noise can reduce when row, and the abrasion of steel ball 7 reduces, and improves the service life of ball screw framework.
In a preferred embodiment, as shown in Figure 1, one end on the inside of cylinder holes close to piston offers a sealing
Slot, piston seal 9 are embedded in seal groove, and piston seal 9 plays the role of piston seal, return and rotation stop, wherein living
Plug sealing ring 9 is rectangular seal or piston seal 9 is cylindrical seal circle, can reduce work using cylindrical seal circle
Skill difficulty and manufacturing cost.
In a preferred embodiment, as shown in Figure 1, being interference fitted on the outside of piston seal 9 and piston 10, piston
10 with cylinder holes inner wall clearance fit, make there is no relatively rotating between piston 10 and shell 13, piston 10 is with respect to the work of shell 13
It is axially moved.
In a preferred embodiment, as shown in Figure 1, the reach of screw rod 6 is longer than the reach of nut 8,
The adjustable displacement distance scope of nut 8 is larger.
Hereinafter, being illustrated with a kind of specific embodiment, it should be pointed out that described in following implementation it
Structure, technique, selection are only to illustrate the feasibility of embodiment, the intention of scope of protection of the utility model that there is no restriction.
The working principle of the electromechanical brake: 1 output torque of actuator drives the rotation of screw rod 6, and screw rod 6 rotates
Nut 8 is driven to move along the length direction of screw rod 6 by several steel balls 7, because nut 8 connects with the step surface in piston 10
The mobile promotion piston 10 of touching, nut 8 is mobile to brake disc direction, and piston 10 pushes inner attrition piece 11 to move to brake disc direction
Dynamic, because the electromechanical brake is floating brake, only bracket is relatively fixed, and piston 10 pushes inner attrition piece 11
During, ball screw framework (including screw rod 6, steel ball 7, nut 8) can bear a reversed axial force, pass through thrust
Bearing 5 and plain washer 4 push shell 13 mobile to the direction far from brake disc, so that shell 13 pushes outside friction disc 12 to braking
Disk direction is mobile, and inner attrition piece 11, outside friction disc 12 complete braking process with braking chuck clamping simultaneously.
A kind of electromechanical brake provided in this embodiment mainly includes by screw rod 6, steel ball in the cylinder holes of shell 13
7, ball screw arrangement, piston seal 9 and piston 10 that nut 8 is constituted.In the nut 8 and piston 10 of ball screw framework
Step face contact, piston 10 and 13 cylinder holes clearance fit of shell, are provided with piston seal 9 between piston 10 and shell 13.Rolling
The thrust platform and thrust bearing 5 of the screw rod 6 of screw mechanism cooperate, and there are spline, screw rod 6 passes through thrust for the outer end of screw rod 6
Bearing 5, plain washer 4,13 cylinder holes of shell centre bore splined end is stretched out except shell 13 connect with actuator 1, transmitting executes
The torque that device 1 exports.And needle bearing 3 is provided between the centre bore of 13 cylinder holes of screw rod 6 and shell, actuator 1 and shell 13
Between be additionally provided with a retaining ring 2, post inner attrition piece 11 close to the claw of piston 10, the claw away from piston 10 is bonded external friction
Piece 12 is equipped with brake disc between inner attrition piece 11 and outside friction disc 12.
A kind of electromechanical brake of the utility model eliminates hydraulic system compared to previous traditional brake,
To eliminate fuel feed hole and vent valve, processing cost and assembly cost are thereby reduced；And the electromechanical brake can
It substitutes electric parking brake and carries out parking braking, compared to the improved efficiency 40% of electric parking brake；The electric mechanical
Actuator in formula brake is placed outside detent housing, simplifies the structure of enclosure interior, reduces overall volume；And nut with
Anti- relative rotation setting between piston and the anti-relative rotation setting between nut and screw rod, improve brake entirety
Braking efficiency, braking reliability are high.
The above is only the utility model preferred embodiments, are not intended to limit the embodiments of the present invention and protection
Range should can appreciate that all with the utility model specification and diagramatic content institute to those skilled in the art
The equivalent replacement made and obviously change obtained scheme, the protection scope of the utility model should all be included in
It is interior.
Claims (10)
1. a kind of electromechanical brake characterized by comprising
Shell, the side of the shell are provided with a clamp, and the clamp include two relatively-movable claws, two cards
Pawl is respectively arranged with a friction plate, and two friction plates are facing each other, and a brake disc, institute are provided between two friction plates
The other side for stating shell offers a perforative cylinder holes；
Ball screw structure, the ball screw structure are arranged in the cylinder holes, and the ball screw structure includes screw rod, spiral shell
Female and several steel balls, one end of the screw rod are pierced by the cylinder holes and connect with actuator driven, and the screw rod is held close to described
The lateral wall of one end of row device is provided with a thrust platform, sets between the inner left wall of the cylinder holes on the right side of the thrust platform
It is equipped with thrust bearing and plain washer, the nut can movably be set in the outside of the screw rod along the spiro rod length direction
Wall is provided with two clamping platforms on the outside of the nut, and is provided with several steel balls between the nut and the screw rod；
Piston, the piston are arranged in the cylinder holes, and one end of the piston is connect with a claw, the piston it is another
One end can movably be contacted with the nut along the spiro rod length direction, and the piston offers a mounting hole, the peace
Dress hole and the outer profile of the nut match, and a piston seal is provided between the outside of the piston and the cylinder holes.
2. a kind of electromechanical brake according to claim 1, which is characterized in that one end of the screw rod with it is described
Actuator is connected by spline.
3. a kind of electromechanical brake according to claim 1, which is characterized in that the thrust platform is installed in institute
The lateral wall or the thrust platform of stating screw rod are releasably set in the lateral wall of the screw rod；The thrust platform is close
Rotation stop boss is provided on the side of the nut, the nut is provided with limiting groove close to the side of the thrust platform,
The limiting groove matches with the rotation stop boss.
4. a kind of electromechanical brake according to claim 1, which is characterized in that the actuator is tight by screw thread
Firmware is connect with the other side of the shell, and a retaining ring is provided between the actuator and the shell.
5. a kind of electromechanical brake according to claim 1, which is characterized in that the screw rod is close to the execution
One end of device is arranged with a needle bearing；Or the screw rod is arranged with sliding bearing close to one end of the actuator；Or it is described
Screw rod is arranged with bushing close to one end of the actuator.
6. a kind of electromechanical brake according to claim 1, which is characterized in that the mounting hole is in the shape of a " convex "
Setting, the mounting hole are set in the outside of the screw rod and the nut.
7. a kind of electromechanical brake according to claim 1, which is characterized in that the both ends of the nut are provided with
Two holddown springs, two holddown springs are embedded the internal screw thread at the nut both ends, and one end of two holddown springs point
It is not contacted with several steel balls.
8. a kind of electromechanical brake according to claim 1, which is characterized in that close to described on the inside of the cylinder holes
One end of piston offers a seal groove, and the piston seal is embedded in the seal groove；The piston seal is square
Shape sealing ring or the piston seal are cylindrical seal circle.
9. a kind of electromechanical brake according to claim 8, which is characterized in that the piston seal with it is described
Interference fit, the piston and the cylinder holes inner wall clearance fit on the outside of piston.
10. a kind of electromechanical brake according to claim 1, which is characterized in that the screw flight length
It is longer than the reach of the nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821425251.4U CN208778549U (en) | 2018-08-31 | 2018-08-31 | A kind of electromechanical brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821425251.4U CN208778549U (en) | 2018-08-31 | 2018-08-31 | A kind of electromechanical brake |
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| Publication Number | Publication Date |
|---|---|
| CN208778549U true CN208778549U (en) | 2019-04-23 |
Family
ID=66159363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821425251.4U Active CN208778549U (en) | 2018-08-31 | 2018-08-31 | A kind of electromechanical brake |
Country Status (1)
| Country | Link |
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| CN (1) | CN208778549U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825686A (en) * | 2018-08-31 | 2018-11-16 | 万向钱潮（上海）汽车系统有限公司 | A kind of electromechanical brake |
| WO2024032349A1 (en) * | 2022-08-08 | 2024-02-15 | 芜湖伯特利汽车安全系统股份有限公司 | Size-reduced brake caliper |
-
2018
- 2018-08-31 CN CN201821425251.4U patent/CN208778549U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825686A (en) * | 2018-08-31 | 2018-11-16 | 万向钱潮（上海）汽车系统有限公司 | A kind of electromechanical brake |
| WO2024032349A1 (en) * | 2022-08-08 | 2024-02-15 | 芜湖伯特利汽车安全系统股份有限公司 | Size-reduced brake caliper |
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