CN209381715U - A kind of suspension system and vehicle - Google Patents

A kind of suspension system and vehicle Download PDF

Info

Publication number
CN209381715U
CN209381715U CN201920105981.4U CN201920105981U CN209381715U CN 209381715 U CN209381715 U CN 209381715U CN 201920105981 U CN201920105981 U CN 201920105981U CN 209381715 U CN209381715 U CN 209381715U
Authority
CN
China
Prior art keywords
suspension system
shock
vehicle
absorbing spring
elasticity device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201920105981.4U
Other languages
Chinese (zh)
Inventor
杨文豪
周志刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henan University of Science and Technology
Original Assignee
Henan University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Henan University of Science and Technology filed Critical Henan University of Science and Technology
Priority to CN201920105981.4U priority Critical patent/CN209381715U/en
Application granted granted Critical
Publication of CN209381715U publication Critical patent/CN209381715U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Vehicle Body Suspensions (AREA)

Abstract

The utility model relates to a kind of suspension system and vehicles.Vehicle includes vehicle body and chassis, and suspension system, the suspension system includes damping element and the electromagnetic elasticity device for being used to form elastic element, the elastic element further includes shock-absorbing spring, the electromagnetic elasticity device is disposed in series in the Path of Force Transfer of shock-absorbing spring, and two magnetic parts of the electromagnetic elasticity device are arranged along the Path of Force Transfer guiding movement of shock-absorbing spring.Electromagnetic elasticity device and shock-absorbing spring in the utility model are arranged in series, and two elastic component active forces are conllinear, can vehicle frame are supported and be buffered.Driver can be according to vehicle condition and road conditions, selectivity is supported or is both supported buffering using vibrating spring, and when magnetic levitation system damage, also vibration damping only can be carried out by shock-absorbing spring, therefore, it introduces shock-absorbing spring and solves the problems, such as that magnetic suspension system energy consumption is higher in the prior art, reliability is poor.

Description

A kind of suspension system and vehicle
Technical field
The utility model relates to a kind of suspension system and vehicles.
Background technique
In recent years, just becoming the focus of Global Auto industrial development under the pressure of energy conservation and environmental protection pressure, electric car.Its In, In-wheel-motor driving electric car is concerned, and Electric Motor Wheel is that hub motor, transmission and brake apparatus are all integrated into wheel Interior, wheel is directly driven by a motor.Such vehicle chassis structure, transmission efficiency, power performance and in terms of all There is unique advantage.But the introducing of hub motor will dramatically increase nonspring carried mass, to make vehicle ride comfort, tire ground connection Property and road friendliness decline, this also influences the universal of hub motor electric vehicle and uses, and hub motor increases in conjunction with wheel hub Add vehicle unsprung mass, be degrading vehicle driving ride comfort and safety, reduces the riding comfort of driver, because This needs to improve suspension system to improve the riding comfort of driver.
In the prior art, suspension system generally comprises guiding mechanism, elastic element and damper etc., and component is more, Therefore automobile chassis height and spring rate do not allow malleable, and causing vehicle comfort can be difficult to be promoted.
The patent document that Authorization Notice No. is CN204367807U discloses a kind of motor vehicle magnetic suspension, including solid Determine frame and the upper bracket and lower bracket for being set to fixed frame upper and lower ends, the left and right ends of upper and lower bracket are respectively arranged with magnetic force Suspension mechanism and the electronic controller of the control magnetic suspension mechanism work, and magnetic suspension mechanism includes dividing on three groups The upper magnet and lower magnet set, upper magnet and lower magnet constitute electromagnetic elasticity device, and electronic controller can be according in suspension The sensor of setting adjusts the repulsive force size between upper and lower magnet to improve roadability, also sets between upper and lower bracket It is equipped with the hydraulic bjuffer as damping element, damping element, hydraulic bjuffer and magnetic suspension mechanism are arranged in parallel, Neng Goufang It only hangs and significantly beats, improve the stability of suspension.
This suspension uses magnetic suspension mechanism, can be improved the regularity and stability of itself, but also deposits In certain disadvantage: only relying on the function that magnetic suspension mechanism realizes elastic element in the suspension, need the vehicle to be always Suspension provides electric energy so that the magnetic suspension mechanism works normally, and energy consumption is high, the burden of vehicle;Once the magnetic force is outstanding After suspension mechanism failure, resilient support can not be played in vehicle, the elastic element of shock absorbing, vehicle can not be after continuing It sails, the reliability of this suspension is poor.
Utility model content
The purpose of this utility model is to provide a kind of suspension systems, to solve magnetic suspension system energy in the prior art Consume problem larger, that reliability is poor;The purpose of this utility model, which also resides in, provides a kind of vehicle, this vehicle have energy consumption compared with It is small, the characteristics of high reliablity.
To achieve the above object, the technical solution of the suspension system of the utility model is:
A kind of suspension system, including damping element and the electromagnetic elasticity device for being used to form elastic element, the elasticity member Part further includes shock-absorbing spring, and the electromagnetic elasticity device is disposed in series in the Path of Force Transfer of shock-absorbing spring, the electromagnetic elasticity Two magnetic parts of device are arranged along the Path of Force Transfer guiding movement of shock-absorbing spring.
The beneficial effects of the utility model are: the electromagnetic elasticity device and shock-absorbing spring in the utility model are arranged in series, Two elastic component active forces are conllinear, and the two collectively forms elastic element, can vehicle body are supported and be buffered, the vibration of vehicle It is dynamic to be absorbed jointly by electromagnetic elasticity device and shock-absorbing spring.Driver can be according to vehicle condition and road conditions, selective use vibration Spring is supported or is both supported buffering;When normally travel, while passing through electromagnetic elasticity device and damping spring Buffered, when vehicle driving is on the preferable road of road conditions, can close electromagnetic elasticity device only rely on shock-absorbing spring into Row vibration damping, energy is no longer consumed in suspension system, and when magnetic levitation system damage, also can only be carried out by shock-absorbing spring Vibration damping improves the stability of suspension system.In conclusion introducing shock-absorbing spring solves magnetic suspension system in the prior art The problem that energy consumption is higher, reliability is poor.
Further, the electromagnetic elasticity device includes the limit for being limited the spacing between two magnetic parts Bit architecture.Two magnetic part disengagings when Vehicular vibration is strong can be limited by position limiting structure, or prevent two magnetism Close to colliding with each other between part, reliability is improved.
Further, the shock-absorbing spring is equipped with guide holder, the electromagnetic elasticity dress close to one end of electromagnetic elasticity device The one of magnetic part set is fixed on guide holder, another magnetic part of electromagnetic elasticity device, which is fixed on, to be used for and vehicle In the sliding seat that body is fixedly connected, it is provided with guide rail in one of them of the sliding seat and guide holder, is equipped on another The guide roller of cooperation, guide rail and the corresponding composition position limiting structure of guide roller are rolled with guide rail.Guide roller and guide rail it Between be rolling friction, resistance is smaller, and the resistance that can reduce between guide holder and sliding seat is buffered between two magnetic parts Influence.
Further, the section of the sliding seat and guide holder is rectangular and lateral equal along rectangular four between the two With interval, the guide rail and guide roller are equipped in the interval of each side.Four faces pass through guide rail and guide roller cooperation The guiding in multiple orientation is carried out, effect is more preferable.
Further, at least one magnetic part of the electromagnetic elasticity device is towards on the end face of another magnetic part Equipped with cushion.Cushion can flexibly support two magnetic parts, prevent two magnetic part direct collisions from occurring Damage.
Further, the end of shock-absorbing spring is arranged in the electromagnetic elasticity device.It will be arranged between electromagnetic elasticity device It is larger in the end portion operation space of shock-absorbing spring, it is easily installed.
To achieve the above object, the technical solution of the vehicle of the utility model is:
A kind of vehicle, including vehicle body and chassis, and the suspension system being arranged between vehicle body and chassis, the suspension system System includes damping element and the electromagnetic elasticity device for being used to form elastic element, and the elastic element further includes shock-absorbing spring, institute It states electromagnetic elasticity device to be disposed in series in the Path of Force Transfer of shock-absorbing spring, two magnetic part edges of the electromagnetic elasticity device The Path of Force Transfer guiding movement of shock-absorbing spring is arranged.
The beneficial effects of the utility model are: the electromagnetic elasticity device and shock-absorbing spring in the utility model are arranged in series, Two elastic component active forces are conllinear, and the two collectively forms elastic element, can vehicle body are supported and be buffered, the vibration of vehicle It is dynamic to be absorbed jointly by electromagnetic elasticity device and shock-absorbing spring.Driver can be according to vehicle condition and road conditions, selective use vibration Spring is supported or is both supported buffering;When vehicle driving is on the preferable road of road conditions, electricity can be closed Magnetoelastic devices only rely on shock-absorbing spring and carry out vibration damping, and energy is no longer consumed in suspension system, and when magnetic levitation system damages When, also vibration damping only can be carried out by shock-absorbing spring, normally travel improves the stability of suspension system.Shown in sum up, introduce Shock-absorbing spring solves the problems, such as that magnetic suspension system energy consumption is higher in the prior art, reliability is poor, since suspension system disappears Consume less, high reliablity, economy also improves for the vehicle, and less for the maintenance of the system of suspension.
Further, the electromagnetic elasticity device includes the limit for being limited the spacing between two magnetic parts Bit architecture.Two magnetic part disengagings when Vehicular vibration is strong can be limited by position limiting structure, or prevent two magnetism It is close between part to collide with each other.
Further, the shock-absorbing spring is equipped with guide holder, the electromagnetic elasticity dress close to one end of electromagnetic elasticity device The one of magnetic part set is fixed on guide holder, another magnetic part of electromagnetic elasticity device, which is fixed on, to be used for and vehicle In the sliding seat that body is fixedly connected, it is provided with guide rail in one of them of the sliding seat and guide holder, is equipped on another The guide roller of cooperation, guide rail and the corresponding composition position limiting structure of guide roller are rolled with guide rail.Guide roller and guide rail it Between be rolling friction, resistance is smaller, and the resistance that can reduce between guide holder and sliding seat is buffered between two magnetic parts Influence.
Further, the section of the sliding seat and guide holder is rectangular and lateral equal along rectangular four between the two With interval, the guide rail and guide roller are equipped in the interval of each side.Four faces pass through guide rail and guide roller cooperation The guiding in multiple orientation is carried out, effect is more preferable.
Further, at least one magnetic part of the electromagnetic elasticity device is towards on the end face of another magnetic part Equipped with cushion.Cushion can flexibly support two magnetic parts, prevent two magnetic part direct collisions from occurring Damage.
Further, the end of shock-absorbing spring is arranged in the electromagnetic elasticity device.It will be arranged between electromagnetic elasticity device It is larger in the end portion operation space of shock-absorbing spring, it is easily installed.
Further, the vehicle uses In-wheel motor driving, and hub motor driven efficiency is higher.
Further, only front suspension system uses the elasticity member being made of electromagnetic elasticity device and shock-absorbing spring to the vehicle Part.Rear-suspension system uses the conventional suspension systems different from front suspension system, and conventional suspension systems, which use, passes through natural resiliency shape Become the elastic element buffered.Since traditional suspension system is directly fixedly connected with vehicle body and wheel, vehicle body can be enhanced Stability.
Detailed description of the invention
Fig. 1 is the front suspension system structural schematic diagram of the specific embodiment of the vehicle of the utility model;
Fig. 2 is the structural schematic diagram of the electromagnetic elasticity device of the specific embodiment of the vehicle of the utility model;
Fig. 3 is the top view of guide holder in Fig. 2.
Description of symbols: 1- shock-absorbing spring;The second electromagnet of 2-;The first electromagnet of 3-;4- coil;5- guide roller; 6- wheel;7- rubber pad;8- battery;9- control switch;10- controller.
Specific embodiment
The embodiments of the present invention is described further with reference to the accompanying drawing.
The specific embodiment of the vehicle of the utility model, vehicle include chassis, vehicle body and setting between vehicle body and chassis Suspension system, suspension system includes damping element and elastic element, and damping element and elastic element are arranged in parallel, damping element It is able to suppress the excessive oscillation of elastic element, guarantees that vehicle body is stablized.Vehicle in the present embodiment is driven using hub motor, is passed Efficiency of movement is high.
As shown in Figure 1, the elastic element in front suspension system includes shock-absorbing spring 1 and electromagnetic elasticity device, shock-absorbing spring 1 It is arranged in series with electromagnetic elasticity device.In the present embodiment, the side for installing electromagnetic elasticity device is provided at the top of shock-absorbing spring 1 The top of shock-absorbing spring 1 has been arranged in by guide holder for the guide holder of shape, electromagnetic elasticity device, so that electromagnetic elasticity device is arranged In the Path of Force Transfer of shock-absorbing spring, the bottom of shock-absorbing spring 1 is fixedly connected on wheel 6.Electromagnetic elasticity device includes first Electromagnet 3 and the second electromagnet 2, the first electromagnet 3 and the second electromagnet 2 are set along the Path of Force Transfer guiding movement of shock-absorbing spring 1 It sets, coil 4 is wound on two electromagnet, coil 4 can make to produce between the first electromagnet 3 and the second electromagnet 2 after being powered Life repels each other or attracting magnetic force, so that vehicle body suspension is on chassis or combines vehicle body and chassis.In the present embodiment Electromagnet constitutes magnetic part.
First electromagnet 3 is fixed on vehicle body, and the second electromagnet 2 is fixed on guide holder.Specifically, vehicle body On be provided with sliding seat for cooperating with guide holder, the rectangular recess of opening downward, the first electricity are provided in sliding seat Magnet 3 is fixed in sliding seat, and direct collision damages between the first electromagnet 3 and the second electromagnet 2 in order to prevent, and second The rubber pad 7 being additionally provided with for buffering is arranged at the top of electromagnet 2.In other embodiments, can not also use rubber pad into Row buffering;In other embodiments, rubber pad can also be respectively provided on the opposite face of two electromagnet.
As shown in Fig. 2, for the ease of being oriented to the second electromagnet 2, in the present embodiment on four side walls of sliding seat It is provided with guide rail, and there are four the guide roller 5 for rolling cooperation with guide rail, guide rollers 5 for the setting of the surrounding of guide holder It is rolling friction between guide rail, friction is small, therefore influences on the buffer function between two electromagnet smaller.Guide rail two End is provided with the block step with the block in the up-down direction of guide roller 5, and after guide roller 5 and guide rail cooperation, guide rail passes through Block step limits the rolling range of guide roller 5, when meet on the way jolt when, vehicle may be detached from ground, connect with wheel 6 The second electromagnet 2 under repulsion effect far from the first electromagnet 3, and block step can prevent the second electromagnet 2 from deviating from.And And due to being provided with guide roller 5 on the four direction of guide holder, additionally it is possible to limit rolling of the vehicle body on direction all around It is dynamic.Guide rail and guide roller in the present embodiment with block step constitute position limiting structure, limit between two electromagnet Distance.In other embodiments, sliding block can also be set on guide holder instead of guide roller, sliding block slides on guide rail, Guide rail limits sliding block to prevent the second electromagnet from deviating from.It in other embodiments, can also be only in guide holder along vehicle Former and later two sides set up guide roller and be oriented to, right and left is upwardly through the outer surface of guide holder and the side of sliding seat Wall contact is oriented to or right and left cooperates upwardly through sliding block and sliding seat.
As shown in figure 3, the conductive connection of coil 4 on the first electromagnet 3 and the second electromagnet 2 in the present embodiment has control Switch 9, control switch 9 are connected to battery 8, can open and close electromagnetic elasticity device, same time control by operation-control switch 9 System switch 9 can also adjust the size of the electric current of 2 coil 4 of the first electromagnet 3 and the second electromagnet, to change the magnetic of the two The size of power, and then change the soft or hard degree of suspension system.Wherein it is also connected between the second electromagnet 2 and control switch 9 Controller 10, controller 10 can change the flow direction of 2 coil of the second electromagnet, 4 electric current, to change 2 magnetic pole of the second electromagnet Direction, and then adjust the second electromagnet 2 and the first electromagnet 3 be the same sex it is opposite or it is anisotropic relatively.
The suspension that vehicle front suspension system in the utility model is combined using electromagnetic elasticity device with shock-absorbing spring 1 System, and rear-suspension system is using traditional suspension system, traditional suspension system can using leaf spring, helical spring etc. Elastically-deformable elastic element occurs, since traditional suspension system is directly fixedly connected with vehicle body and wheel, rear-suspension system Using the stability that can enhance vehicle body after traditional suspension system.Front suspension system can be carried out by driver according to road conditions It adjusts, such as when road conditions are bad, driver opens control switch 9, and the magnetic pole of the second electromagnet 2 is adjusted by controller 10 Direction keeps the second electromagnet 2 and 3 same sex of the first electromagnet opposite, and the first electromagnet 3 and the second electromagnet 2 are mutually exclusive at this time, Automobile body is mutually separated with chassis, is met on the way when jolting, can be buffered jointly by magnetic force and shock-absorbing spring 1;When road conditions compared with When good, the electric current of two pieces of electromagnet coils 4 can be cut off by control switch 9, at this point, the first electromagnet 3 and the second electromagnetism There is no magnetic force between iron 2, be stacked together between the two by rubber pad 7, is carried out between vehicle body and chassis by shock-absorbing spring 1 Buffering, energy is no longer consumed in suspension system at this time;When road conditions are preferable but body of a motor car is not close in conjunction with chassis, can pass through Adjusting controller 10 changes the flow direction of electric current in 2 coil 4 of the second electromagnet, keeps the first electromagnet 3 and the second electromagnet 2 anisotropic Relatively, the two is attracted each other, and clamps rubber pad 7, prevents the first electromagnet 3 and the second electromagnet 2 from separating, between vehicle body and chassis Vibration damping is carried out by shock-absorbing spring 1.And when magnetic levitation system damage, also vibration damping only can be carried out by shock-absorbing spring, just Often traveling, improves the stability of suspension system.
In other embodiments, the first electromagnet in electromagnetic elasticity device can also be not arranged in recess, but be set It sets in the plane of vehicle frame bottom surface, can be oriented at this time at other of vehicle body and chassis position, such as filled in electromagnetic elasticity It sets and guide post is set on side setting vehicle body, vehicle body and chassis are oriented to by setting guide sleeve on chassis.
Guide roller in the present embodiment is arranged on guide holder, in other embodiments, can also be by guide roller It is arranged in sliding seat, guide rail is arranged on guide holder.
Magnetic part is two electromagnet in electromagnetic elasticity device in the present embodiment, in other embodiments magnetic part Electromagnet can be used with one, one uses permanent magnet, by changing size of current and direction adjusting in electromagnet coil The magnetic force size and Orientation of electromagnet.
In other embodiments, can also only the elastic element in rear-suspension system using above-mentioned electromagnetic elasticity device and subtract The elastic element that vibration spring is cascaded;Or front suspension system and rear-suspension system are all made of electromagnetic elasticity device and vibration damping The elastic element that spring is cascaded.
The embodiment of the suspension system of the utility model, the structure of suspension system and above-mentioned vehicle is specific in the present embodiment Front suspension system structure in embodiment is identical, and details are not described herein.

Claims (9)

1. a kind of suspension system, including damping element and the electromagnetic elasticity device for being used to form elastic element, it is characterised in that: institute Stating elastic element further includes shock-absorbing spring, and the electromagnetic elasticity device is disposed in series in the Path of Force Transfer of shock-absorbing spring, described Two magnetic parts of electromagnetic elasticity device are arranged along the Path of Force Transfer guiding movement of shock-absorbing spring.
2. suspension system according to claim 1, it is characterised in that: the electromagnetic elasticity device includes for two magnetic The position limiting structure that spacing between property part is limited.
3. suspension system according to claim 2, it is characterised in that: the shock-absorbing spring close to electromagnetic elasticity device one End is equipped with guide holder, and one of magnetic part of the electromagnetic elasticity device is fixed on guide holder, electromagnetic elasticity device Another magnetic part is fixed on one of them of the sliding seat for being fixedly connected with vehicle body, the sliding seat and guide holder On be provided with guide rail, the guide roller that cooperation is rolled with guide rail is equipped on another, guide rail and guide roller are corresponding to constitute institute State position limiting structure.
4. suspension system according to claim 3, it is characterised in that: the section of the sliding seat and guide holder is rectangular And interval laterally is all had at rectangular four between the two, the guide roller is equipped in the interval of each side.
5. suspension system according to claim 1-4, it is characterised in that: at least the one of the electromagnetic elasticity device A magnetic part is equipped with cushion towards the end face of another magnetic part.
6. suspension system according to claim 1-4, it is characterised in that: the electromagnetic elasticity device setting is subtracting The end of vibration spring.
7. a kind of vehicle, including vehicle body and chassis, and the suspension system being arranged between vehicle body and chassis, it is characterised in that: The suspension system includes suspension system described in any one of the claims 1-6.
8. vehicle according to claim 7, it is characterised in that: the vehicle uses In-wheel motor driving.
9. vehicle according to claim 7, it is characterised in that: only front suspension system is used including electromagnetic elasticity the vehicle The elastic element of device and shock-absorbing spring.
CN201920105981.4U 2019-01-22 2019-01-22 A kind of suspension system and vehicle Active CN209381715U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920105981.4U CN209381715U (en) 2019-01-22 2019-01-22 A kind of suspension system and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920105981.4U CN209381715U (en) 2019-01-22 2019-01-22 A kind of suspension system and vehicle

Publications (1)

Publication Number Publication Date
CN209381715U true CN209381715U (en) 2019-09-13

Family

ID=67853785

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920105981.4U Active CN209381715U (en) 2019-01-22 2019-01-22 A kind of suspension system and vehicle

Country Status (1)

Country Link
CN (1) CN209381715U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109649103A (en) * 2019-01-22 2019-04-19 河南科技大学 Suspension system and vehicle
CN112208284A (en) * 2020-10-09 2021-01-12 广东博智林机器人有限公司 Suspension system and vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109649103A (en) * 2019-01-22 2019-04-19 河南科技大学 Suspension system and vehicle
CN112208284A (en) * 2020-10-09 2021-01-12 广东博智林机器人有限公司 Suspension system and vehicle

Similar Documents

Publication Publication Date Title
CN109649103A (en) Suspension system and vehicle
CN103061287B (en) Magnetorheological fluid speed bump
CN209381715U (en) A kind of suspension system and vehicle
CN206145051U (en) Novel initiative magnetic force shock absorber of car
CN110341566B (en) Seat suspension device with vibration energy recovery and vibration active control functions
CN106004306B (en) Magnetic suspension suspension and vehicle with it
CN107554542B (en) Permanent magnet suspension vibration damping and noise reducing device for train carriage
CN202806285U (en) Novel rear air suspension device
CN203005450U (en) Large-axle-weight bogie tumbler type axle box locating device
CN204749784U (en) Suspension system behind vehicle air spring
CN202833833U (en) Novel electromagnetic shock absorber
CN102963381A (en) H-type suspension frame type running mechanism
CN201272361Y (en) Semi-active shock-absorbing device of rail vehicle
CN202156256U (en) Cushioning device for automobile chassis
CN110143107B (en) Vehicle hybrid secondary suspension system
CN203391592U (en) Automotive negative stiffness suspension mechanism and automobile with same
CN214296283U (en) Two-wheel motorcycle
CN210652777U (en) Vehicle seat suspension
KR101465009B1 (en) Secondary suspension device for railway car using magnetic levitation principle
CN201516795U (en) Air suspension device
CN201144994Y (en) Permanent magnetism electromagnetic adjustable shock absorber
CN109861359B (en) Vibration power generation device of automobile
CN112644539A (en) Magnetic suspension spring for railway vehicle
CN106427449B (en) Magnetic suspension suspension and vehicle with it
CN202765001U (en) H-shaped suspension frame walking mechanism

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant