CN210653053U - Stay cable type hand brake and electronic brake system - Google Patents
Stay cable type hand brake and electronic brake system Download PDFInfo
- Publication number
- CN210653053U CN210653053U CN201921796173.3U CN201921796173U CN210653053U CN 210653053 U CN210653053 U CN 210653053U CN 201921796173 U CN201921796173 U CN 201921796173U CN 210653053 U CN210653053 U CN 210653053U
- Authority
- CN
- China
- Prior art keywords
- brake
- pull
- fixed
- cable
- pull rod
- 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
Links
Images
Abstract
The utility model relates to the technical field of vehicle brake mechanisms, in particular to a pull rope type hand brake and an electronic brake system, wherein the hand brake comprises an electric push-pull rod, an action part, a position switch, a fixed seat, a first brake cable, a cable adjusting bolt, a second brake cable, a third brake cable and a switching bracket, the telescopic end of the electric push-pull rod is hinged and fixed with the upper end of the action part, the fixed end of the electric push-pull rod is used for being hinged and fixed on the vehicle body, the action part is hinged and fixed on the fixed seat, the position switch is arranged between the action part and the fixed seat and is used for detecting the opening and closing of the action part, the first brake cable is fixed on the action part through a cable adjusting bolt, the action part rotates to drive the first brake cable to move, and the second brake cable and the third brake cable are connected with the moving end of the first brake cable through the switching bracket. The pull rope type hand brake has good stability and low failure rate, and is favorable for reducing the use cost.
Description
Technical Field
The utility model relates to a vehicle brake mechanism technical field especially relates to a pull rope formula manual brake and electronic braking system.
Background
The electronic brake system is generally added with a caliper motor on a brake disc to control the braking and releasing of the vehicle. When a vehicle needs to be parked when the vehicle is parked, a user applies a parking instruction to the parking switch, the instruction is transmitted to the controller to be processed, the controller outputs current to drive the caliper motor, the caliper motor drives the brake cylinder to move forwards through multiple times of speed reduction and torque increase, and the purpose of pushing the brake pads to compress the brake disc is achieved. Therefore, the aim of parking the vehicle in place is fulfilled by the friction force generated by the brake pad and the brake disc. When the vehicle needs to be unlocked and parked when being started and stopped during parking, a user applies a release instruction to the parking switch, the release instruction is transmitted to the controller to be processed, the controller outputs current to drive the caliper motor, the caliper motor drives the brake oil cylinder to return through multiple times of speed reduction and torque increase, and the purpose of pushing the brake pad to press and separate the brake disc is achieved. Therefore, the aim of unlocking and parking the vehicle in situ is fulfilled by separating the brake pad from the brake disc.
However, the above-described scheme has the following problems: 1. the parts are distributed, when the parts are connected through wires, a wire harness moving part is generated from a vehicle body to a caliper motor, the conditions of durable fatigue fracture and the like of the wire harness are easy to occur, and the system failure rate is high; 2. the caliper motor needs to be arranged at the wheel of the chassis, is one of the worst places of the whole vehicle environment, has high protection and design requirements on the caliper motor, and causes high cost; 3. because the caliper motor directly acts on the brake cylinder, the parking state influences the gap between the brake pad and the brake disc, in order to avoid the situation, the brake system can be fixed only by repeated calibration, and the time and material cost is high; 4. install the controller on the vehicle, for the condition that avoids appearing short circuit or break circuit between controller to calliper motor, the controller need apply undercurrent voltage to brake calliper many times in a certain period to whether the detection calliper motor is connected normally, influences other control element easily.
Disclosure of Invention
Therefore, a pull-rope type hand brake and an electronic brake system are needed to be provided, so that the problems that in the prior art, the brake system is poor in stability, high in failure rate and high in manufacturing and using cost are solved.
In order to achieve the above object, the inventor provides a pull-cable type hand brake, which comprises an electric push-pull rod, an action part, a position switch, a fixed seat, a first brake pull cable, a pull cable adjusting bolt, a second brake pull cable, a third brake pull cable and a transfer bracket, wherein the telescopic end of the electric push-pull rod is hinged and fixed with the upper end of the action part, the fixed end of the electric push-pull rod is used for being hinged and fixed on a vehicle body, the action part is hinged and fixed on the fixed seat, the position switch is arranged between the action part and the fixed seat and used for detecting the opening and closing of the action part, the first brake pull cable is fixed on the action part through the pull cable adjusting bolt, the action part rotates to drive the first brake pull cable to move, the second brake pull cable and the third brake pull cable are connected with the moving end of the first brake pull cable through the transfer bracket, the second brake pull cable, the third brake cable is used for connecting the left rear wheel.
As a preferred structure of the utility model, the manual brake still includes the push-and-pull rod fixed bolster, the push-and-pull rod fixed bolster is used for with the automobile body fixed, the stiff end of electronic push-and-pull rod is connected with the push-and-pull rod fixed bolster is articulated through first fixed pin axle.
As a preferred structure of the utility model, the flexible end of electronic push-and-pull rod is articulated fixedly through the upper end of second fixed pin axle with action portion, and electronic push-and-pull rod concertina movement orders about action portion and rotates around the fixing base.
As a preferred structure of the utility model, the action portion is articulated with the fixing base through the third fixed pin axle.
In order to achieve the above object, the inventor further provides a pull-rope type electronic brake system, the brake system includes a hand brake, an electronic parking controller and a storage battery, the hand brake is the above pull-rope type hand brake, the electronic parking controller is used for receiving a control signal, the storage battery is connected with the electronic parking controller, and the electronic parking controller is connected with a driving motor of the electric push-pull rod.
As a preferred structure of the present invention, the driving motor is disposed at the middle position or the front cabin position of the vehicle body.
Different from the prior art, the technical scheme has the following advantages: the utility model relates to a stay cable formula manual brake and electronic braking system, wherein at first open and shut through position switch detection action portion in the stay cable formula manual brake to obtain that electronic push-and-pull rod is in the extension or shortens the state, be in parking or release state with the decision vehicle. When the position switch detects that the action part is separated relative to the fixed seat, the electric push-pull rod is in an extension state, and the vehicle is in a parking state. If the vehicle is required to be adjusted to a release state, the driving motor of the electric push-pull rod drives the telescopic end of the electric push-pull rod to contract, the actuating part is driven to do circular arc motion clockwise around the hinged position of the actuating part and the fixed seat as a circle center, so that the first brake cable is driven to move and release, the second brake cable and the third brake cable linked with the first brake cable through the switching support are released, and the vehicle is parked and released by releasing the tire. On the contrary, when the motion switch detection action part is closed relative to the fixed seat, the electric push-pull rod is in a shortened state, and the vehicle is in a released state. If the parking state needs to be adjusted, the driving motor of the electric push-pull rod drives the telescopic end of the electric push-pull rod to extend, the actuating portion is driven to do circular arc motion around the hinged position of the actuating portion and the fixing seat as a circle center along the anticlockwise direction, the first brake cable is driven to move and strain, the second brake cable and the third brake cable linked with the first brake cable through the switching support are strained, and therefore the tire is strained to achieve parking braking. In the scheme, the pull rope type hand brake is simple in structure and relatively compact in structure, the first brake cable, the second brake cable and the third brake cable are connected with a traditional brake disc for braking, an electric appliance part is shortened as much as possible, a mature cable part is enlarged, and the possibility of short circuit and open circuit of an electric wire is reduced; meanwhile, the driving motor is prevented from being arranged at the wheel of the chassis, the motor is prevented from being damaged, and the stability and the reliability of the electronic brake system are improved; the pull-rope type hand brake does not need to use a customized motor caliper, only needs to use a common caliper with a mechanical hand brake, and does not need to spend a large amount of time and high cost to repeatedly calibrate a brake system; in addition, the driving motor of the electric push-pull rod is good in stability, whether the driving motor is normally connected or not does not need to be monitored in real time, voltage is regularly applied for monitoring, and therefore the fact that regular detection impact is coupled with other signals is avoided, and other control elements are affected.
Drawings
FIG. 1 is a schematic side view of a portion of a pull-cord hand brake according to an embodiment;
FIG. 2 is a schematic side view of a portion of a pull-cord hand brake according to an embodiment;
FIG. 3 is an enlarged view of area A of FIG. 1;
fig. 4 is a schematic diagram of an electrical connection structure of a cable-type electronic brake system according to an embodiment of the present invention.
Description of reference numerals:
1. an electric push-pull rod; 100. a drive motor;
2. an operation section;
3. a position switch;
4. a fixed seat;
5. a first brake cable;
6. a cable adjusting bolt;
7. a second brake cable;
8. a third brake cable;
9. a transfer bracket;
10. a right rear wheel;
11. a left rear wheel;
12. a push-pull rod fixing bracket;
13. a first fixed pin;
14. a second fixed pin shaft;
15. a third fixed pin shaft;
16. an electronic parking controller;
17. and (4) a storage battery.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1 to 4 together, the present embodiment discloses a pull-cord type hand brake, which is used in an automobile to perform parking brake or parking release for improving safety of the automobile. Specifically, fig. 1 and fig. 2 jointly constitute the pull-rope hand brake of the present invention. The hand brake comprises an electric push-pull rod 1, an action part 2, a position switch 3, a fixing seat 4, a first brake cable 5, a cable adjusting bolt 6, a second brake cable 7, a third brake cable 8 and a transfer support 9, wherein the telescopic end of the electric push-pull rod 1 is hinged and fixed with the upper end of the action part 2, the fixed end of the electric push-pull rod 1 is used for being hinged and fixed on a vehicle body, the action part 2 is hinged and fixed on the fixing seat 4, the position switch 3 is arranged between the action part 2 and the fixing seat 4, the position switch 3 is used for detecting the opening and closing of the action part 2, the position switch is an existing product and is specifically characterized in that the position switch is disconnected after being pressed and is switched on when not being pressed, the first brake cable 5 is fixed on the action part 2 through the cable adjusting bolt, the action part 2 rotates to drive the first brake cable 5 to move, and the second brake cable 7 and the third brake cable 8 are connected with the first brake cable 5 through the transfer support 9 The movable end is connected, the second brake cable 7 is used for connecting a right rear wheel 10, and the third brake cable 8 is used for connecting a left rear wheel 11. The electric push-pull rod 1 can be driven by the driving motor 100 to linearly extend and retract, so as to provide driving force for changing the parking state. The upper end part of the action part 2 is hinged with the electric push-pull rod 1, and can rotate around the hinged part of the electric push-pull rod 1 and the fixed seat 4 under the driving of the electric push-pull rod 1, so that the first brake cable 5 fixed on the action part 2 is driven to move, the synchronous movement of the second brake cable 7 and the third brake cable 8 is controlled through the first brake cable 5, and the parking state of the vehicle is finally changed.
As shown in fig. 3, the position switch 3 actually and directly detects the open/close state between the operating part 2 and the fixed seat 4, and after sending a detection signal to the electronic parking controller 16, the electronic parking brake analyzes the extended state and the parked state of the electric push-pull rod 1. Such as: when the position switch 3 detects that the action part 2 is separated relative to the fixed seat 4, the electric push-pull rod 1 is in an extension state, and the vehicle is in a parking state; when the position switch 3 detects that the operating part 2 is closed relative to the fixed seat 4, the electric push-pull rod 1 is in a shortened state, and the vehicle is in a released state.
The fixed seat 4 is used as a position limiting mechanism of the action part 2, so that the action part 2 can only rotate clockwise or anticlockwise around the hinged position of the action part and the fixed seat 4, and the first brake cable 5 fixed on the action part 2 is driven to be pulled or loosened. The first brake cable 5 is intended to be fixed to the actuating part 2 in such a way that it can transmit the movement of the actuating part 2 to the second brake cable 7 and the third brake bolt. The first brake cable 5 is fixed with the action part 2 through a cable adjusting bolt, and the tightness of the cable can be adjusted through adjusting the cable adjusting bolt so as to adjust the tightness of parking. After a brake system fault occurs, the cable adjusting bolt on the first brake cable 5 can be unscrewed through a mechanical means, the vehicle can be unlocked, normal running of the vehicle is not affected, and only warning is performed on an automobile instrument panel. The second brake cable 7 and the third brake cable 8 are respectively connected with the right rear wheel 10 and the left rear wheel 11, and after the connection through the transfer bracket 9, the motion of the first brake cable 5 can be accurately transmitted to the brake pad, so that the parking state is changed. Automotive brake systems are generally divided into two categories. The brake system comprises a disc brake, wherein a second brake cable and a third brake cable in the pull cable type hand brake are respectively connected with a brake cylinder, and the brake cylinder pushes a brake caliper to move to block or release a brake disc; and secondly, drum braking, wherein a second brake cable and a third brake cable in the pull cable type hand brake are respectively connected with the brake drum, and the brake drum is controlled to move by the brake hand brake. The above two braking modes are both the existing mature technologies, and are not described herein again.
In the pull-rope hand brake and electronic brake system of the embodiment, when a vehicle needs to be parked and released, position detection is firstly carried out through the position switch 3, if the action part 2 is detected to be closed relative to the fixed seat 4, the push-pull rod is in a shortened state, and the vehicle is in a released state, the electronic parking controller 16 does not make an instruction; when the position switch 3 detects that the action part 2 is separated from the fixed seat 4, the electric push-pull rod 1 is in an extension state, and the vehicle is in a parking state. The driving motor 100 of the electric push-pull rod 1 drives the telescopic end of the electric push-pull rod 1 to contract, and drives the action part 2 to do circular arc motion clockwise around the hinged position of the action part and the fixed seat 4 as a circle center, so that the first brake cable 5 is driven to move and relax, the second brake cable 7 and the third brake cable 8 which are linked with the first brake cable 5 through the transfer support 9 are relaxed, and the tire is loosened to achieve parking release.
When parking braking is needed, when the action switch 3 detects that the action part 2 is separated from the fixed seat 4, the electric push-pull rod 1 is in an extension state, and the vehicle is in a parking state, the electronic parking controller 16 does not make an instruction; when the position switch 3 detects that the operating part 2 is closed relative to the fixed seat 4, the electric push-pull rod 1 is in a shortened state, and the vehicle is in a released state. If the parking state needs to be adjusted, the driving motor 100 of the electric push-pull rod 1 drives the telescopic end of the electric push-pull rod 1 to extend, the action part 2 is driven to do circular arc motion around the hinged position of the action part and the fixed seat 4 as a circle center along the anticlockwise direction, so that the first brake cable 5 is driven to move and be tensioned, the second brake cable 7 and the third brake cable 8 which are linked with the first brake cable 5 through the transfer support 9 are tensioned, and the tire is tensioned to achieve parking braking.
In the scheme, the cable type hand brake is simple in structure and relatively compact in structure, the first brake cable 5, the second brake cable 7 and the third brake cable 8 are connected with a traditional brake disc for braking, an electric appliance part is shortened as much as possible, a mature cable part is enlarged, and the possibility of short circuit and open circuit of an electric wire is reduced; meanwhile, the driving motor 100 is prevented from being arranged on the wheel outlet of the chassis, the motor is prevented from being damaged, and the stability and the reliability of the electronic braking system are improved; the pull-rope type hand brake does not need to use a customized motor caliper, only needs to use a common caliper with a mechanical hand brake, and does not need to spend a large amount of time and high cost to repeatedly calibrate a brake system; in addition, the driving motor 100 of the electric push-pull rod 1 has good stability, and whether the driving motor 100 is normally connected or not does not need to be monitored in real time, voltage is regularly applied for monitoring, and further, regular detection impact is prevented from being coupled with other signals, so that other control elements are influenced.
Referring to fig. 1, as a preferred embodiment of the present invention, the hand brake further includes a push-pull rod fixing bracket 12, the push-pull rod fixing bracket 12 is used for being fixed to a vehicle body, and a fixed end of the electric push-pull rod 1 is hinged to the push-pull rod fixing bracket 12 through a first fixing pin 13. The push-pull rod fixing bracket 12 serves as a connecting part between the electric push-pull rod 1 and the vehicle body, and is used for fixing the electric push-pull rod 1 on the vehicle body in a hinged manner so as to facilitate installation of the electric push-pull rod 1. The electric push-pull rod 1 is hinged to the push-pull rod fixing support 12 through the first fixing pin shaft 13, the connection is firm, the small-range rotation of the electric push-pull rod 1 is facilitated, and the parking work is facilitated.
Referring to fig. 1, as a preferred embodiment of the present invention, the telescopic end of the electric push-pull rod 1 is hinged and fixed to the upper end of the action part 2 through a second fixing pin 14, the telescopic motion of the electric push-pull rod 1 drives the action part 2 to rotate around the fixing base 4, the telescopic end of the electric push-pull rod 1 is hinged to the upper end of the action part 2 through the second fixing pin 14, the hinged position is more firmly fixed, and the electric push-pull rod is not easily hinged to fall off, which affects the use. In a specific embodiment, the actuating portion 2 is hinged to the fixing base 4 through a third fixing pin 15.
Referring to fig. 1 to 4, in a further embodiment, the present invention further provides a pull-cable electronic braking system, the braking system includes a hand brake, an electronic parking controller 16 and a storage battery 17, the hand brake is the above-mentioned pull-cable hand brake, the electronic parking controller 16 is used for receiving a control signal, the storage battery 17 is connected with the electronic parking controller 16, and the electronic parking controller 16 is connected with a driving motor 100 of the electric push-pull rod 1. The electronic parking controller 16 is used as a control unit for vehicle parking braking and parking release, receives a control signal input by a user through the electronic parking controller 16, and then judges whether the parking state adjustment is needed or not after receiving a signal detected by the position switch 3. When the adjustment is needed, a control signal is sent to the driving motor 100 of the electric push-pull rod 1, so that the expansion and contraction of the electric push-pull rod 1 are controlled, the tensioning of the left rear wheel 11 and the right rear wheel 10 of the vehicle is controlled through the transmission of the actuating part 2 of the pull-rope type hand brake and the first brake cable 5, and finally the tensioning of the second brake cable 7 and the third brake cable 8 or the releasing of the parking brake is completed. Specifically, the electronic parking controller 16 is connected to a vehicle CAN network and controlled by a CAN signal. The brake system has the advantages of simple and compact structure, good stability, difficult failure and lower use cost.
In a specific embodiment, the driving motor 100 is disposed at a middle position or a front compartment position of the vehicle body. After the novel pull-rope type hand brake is used, the driving motor 100 of the electric push-pull rod 1 does not need to be arranged at the wheel of the chassis. Preferably, the driving motor 100 may be disposed at a middle position of the vehicle body or a front compartment and then connected to a conventional wheel brake disc through the second and third brake cables 7 and 8 to perform a braking operation. The arrangement position of the driving motor 100 can shorten the electrical connection part as much as possible, amplify the mature inhaul cable technology and reduce the possibility of short circuit and open circuit of the electric wire; meanwhile, the driving motor 100 is prevented from being arranged at the wheel of the chassis, the motor is prevented from being damaged, and the stability and the reliability of the electronic braking system are improved.
It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications of the embodiments described herein, or the equivalent structure or equivalent process changes made by the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the protection scope of the present invention.
Claims (6)
1. A pull-rope type hand brake is characterized in that the hand brake comprises an electric push-pull rod, an action part, a position switch, a fixed seat, a first brake pull rope, a pull-rope adjusting bolt, a second brake pull rope, a third brake pull rope and a switching bracket, the telescopic end of the electric push-pull rod is hinged and fixed with the upper end of the action part, the fixed end of the electric push-pull rod is used for being hinged and fixed on the vehicle body, the action part is hinged and fixed on the fixed seat, the position switch is arranged between the action part and the fixed seat and is used for detecting the opening and closing of the action part, the first brake cable is fixed on the action part through a cable adjusting bolt, the action part rotates to drive the first brake cable to move, the second brake cable and the third brake cable are connected with the moving end of the first brake cable through the transfer support, the second brake cable is used for connecting the right rear wheel, and the third brake cable is used for connecting the left rear wheel.
2. The pull-cord hand brake of claim 1, further comprising a push-pull rod fixing bracket for fixing to a vehicle body, wherein a fixed end of the electric push-pull rod is hinged to the push-pull rod fixing bracket by a first fixing pin.
3. The pull-cord type hand brake of claim 2, wherein the telescopic end of the electric push-pull rod is fixed to the upper end of the actuating portion through a second fixed pin shaft in a hinged manner, and the telescopic movement of the electric push-pull rod drives the actuating portion to rotate around the fixed seat.
4. The pull-cord hand brake according to claim 2, wherein the actuating portion is hinged to the fixed seat by a third fixed pin.
5. A pull-rope type electronic brake system, which comprises a hand brake, an electronic parking controller and a storage battery, and is characterized in that the hand brake is the pull-rope type hand brake as claimed in any one of claims 1 to 4, the electronic parking controller is used for receiving a control signal, the storage battery is connected with the electronic parking controller, and the electronic parking controller is connected with a driving motor of an electric push-pull rod.
6. The pullcable-type electronic brake system as claimed in claim 5, wherein the driving motor is disposed at a middle position or a front compartment position of the vehicle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921796173.3U CN210653053U (en) | 2019-10-24 | 2019-10-24 | Stay cable type hand brake and electronic brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921796173.3U CN210653053U (en) | 2019-10-24 | 2019-10-24 | Stay cable type hand brake and electronic brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210653053U true CN210653053U (en) | 2020-06-02 |
Family
ID=70845908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921796173.3U Active CN210653053U (en) | 2019-10-24 | 2019-10-24 | Stay cable type hand brake and electronic brake system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210653053U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110562219A (en) * | 2019-10-24 | 2019-12-13 | 福建汉特云智能科技有限公司 | Stay cable type hand brake and electronic brake system |
-
2019
- 2019-10-24 CN CN201921796173.3U patent/CN210653053U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110562219A (en) * | 2019-10-24 | 2019-12-13 | 福建汉特云智能科技有限公司 | Stay cable type hand brake and electronic brake system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6249737B1 (en) | Vehicle parking brake system | |
| US7490699B2 (en) | Mechanism with load sensor for operating a brake | |
| CA2665622C (en) | Reduced power mode for an aircraft electric brake system | |
| US6962094B2 (en) | Adjustable pedal assembly | |
| JPH11148522A (en) | Motor-driven brake and brake system | |
| KR101037028B1 (en) | A electronic parking break unit with a strain gage | |
| CN103419771A (en) | Electronic parking brake system and method of indicating malfunction of parking brake switch | |
| KR970000299B1 (en) | Electronically controlled fluid release fifth wheel mechanism | |
| US20090152831A1 (en) | Hitching device with stabilizer for avoiding and/or damping rolling motions between a traction vehicle and a trailer coupled to this traction vehicle | |
| AU2020201936B2 (en) | Locomotive parking brake | |
| MXPA03001872A (en) | Electrically powered parking brake. | |
| CN101780795A (en) | Brake system | |
| CN210653053U (en) | Stay cable type hand brake and electronic brake system | |
| WO2004020265A1 (en) | Cable tension sensing device | |
| JP3546156B2 (en) | Automotive parking brake and its operation method | |
| CN112298125A (en) | Brake-by-wire system and vehicle | |
| CN110562219A (en) | Stay cable type hand brake and electronic brake system | |
| US8739944B1 (en) | Electronic parking brake actuator | |
| US20240132027A1 (en) | Vehicle braking system | |
| CN207192707U (en) | A kind of autobrake system of electri forklift | |
| KR100456779B1 (en) | brake apparatus for automobile | |
| CN114312709A (en) | Braking system and vehicle | |
| US20080210501A1 (en) | Assistive Front Electric Brakes For Gas Or Electric Vehicles | |
| KR910005657Y1 (en) | Brake system of lifting car | |
| US2386023A (en) | Brake construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |