A brake device for a harley electric vehicle

Abstract

The utility model relates to a kind of brake device of harley electric vehicle, including brake master cylinder and brake caliper, brake master cylinder is rotatably installed with pull rod on through connecting shaft, the outer surface of brake master cylinder is connected with first three-way pipe, two end portions of first three-way pipe are connected with brake oil pipe;The outer surface of brake caliper is connected with second three-way pipe, the end portion of two brake oil pipes is respectively connected with the two ends of second three-way pipe, first three-way pipe, brake oil pipe and second three-way pipe are commonly provided with leak stop mechanism;Brake caliper is installed with pipe body in inside, and the inside of pipe body is provided with piston rod. Through the setting of two brake oil pipes and leak stop mechanism, another brake oil pipe can still provide brake action when one brake oil pipe bursts, and safety factor is high, and burst brake oil pipe can also be promptly leak-stopped, reduce the waste of hydraulic oil and pollution to vehicle body, surrounding environment.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, specifically a braking device for a Harley-Davidson electric vehicle. Background Technology

[0002] Electric vehicles are two-wheeled vehicles powered by electricity, combining the lightweight and agile characteristics of bicycles with the convenience of electric motor assistance. Their core features include a rechargeable battery and an electric motor, which provides additional power assistance, reducing the burden of riding and making travel more effortless. They are suitable for daily short commutes and shopping trips, as well as leisure riding needs, making them an ideal choice for green travel and a convenient lifestyle.

[0003] Current Harley-Davidson electric vehicles generally use a single-pump-single-pipe-single-caliper hydraulic braking circuit. If the pipe bursts, the pump leaks oil, or the caliper fails, the entire vehicle will lose braking instantly, resulting in a low safety factor. At the same time, heavy-duty vehicles have a large curb weight, and traditional manual lever braking force is insufficient. Female drivers or those with less arm strength have excessively long emergency braking distances, affecting driving safety. Utility Model Content

[0004] The purpose of this invention is to provide a braking device for Harley-Davidson electric vehicles, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] A braking device for a Harley-Davidson electric vehicle includes a master cylinder and a brake caliper. A lever is rotatably mounted on the master cylinder via a connecting shaft. A first T-connector is connected to the outer surface of the master cylinder, with brake lines connected to both ends of the first T-connector. A second T-connector is connected to the outer surface of the brake caliper, with the ends of two brake lines connected to the two ends of the second T-connector, respectively. A leak-proof mechanism is provided on the first T-connector, the brake lines, and the second T-connector. A tube is installed inside the brake caliper, and a piston rod is housed inside the tube. The end of the piston rod slides through to the outside of the brake caliper and is fitted with a brake pad. An electronic power assist mechanism is located inside the piston rod.

[0007] Furthermore, the leak-proof mechanism includes two first solenoid valves located at both ends of the first tee pipe, two second solenoid valves located at both ends of the second tee pipe, and two flow sensors located on the two brake lines. A controller is located on top of the master cylinder, and the first solenoid valves, second solenoid valves, and flow sensors are all electrically connected to the controller.

[0008] Furthermore, the electronic assist mechanism includes a push rod disposed inside the piston rod, the end of which slides through to the outside of the piston rod. A threaded hole is formed inside the push rod, and a micro motor is installed inside the piston rod. The output shaft of the micro motor is connected to a screw, which is inserted into and threadedly connected to the threaded hole. The micro motor is electrically connected to the controller.

[0009] Furthermore, a torque sensor is installed on the connecting shaft, and the torque sensor is electrically connected to the controller.

[0010] Furthermore, a first limiting ring is provided at the end of the tube body, a second limiting ring is provided at the end of the piston rod, and a third limiting ring is provided on the outer surface of the push rod.

[0011] Furthermore, a mounting sleeve is installed on the outer surface of the brake master cylinder, and a mounting base is installed on the outer surface of the brake caliper.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0013] 1. This utility model, through the setting of two brake oil pipes and a leak-proof mechanism, can ensure that when one brake oil pipe bursts, the other brake oil pipe can still provide braking effect, which has a high safety factor. It can also promptly stop the leak of the burst brake oil pipe, reducing the waste of hydraulic oil and pollution to the vehicle body and the surrounding environment.

[0014] 2. By incorporating a torque sensor, controller, and electronic power assist mechanism, this invention allows the brake pads to be pushed by hydraulic oil and additionally by electronic power assist when the lever is pressed. Under the combined effect of these two mechanisms, the braking distance can be significantly shortened, improving driving safety for female drivers or drivers with less arm strength. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0016] Figure 2 for Figure 1 Enlarged diagram of A in the middle;

[0017] Figure 3 This is a schematic diagram of the brake caliper in this utility model;

[0018] Figure 4 This is a cross-sectional structural diagram of the brake caliper in this utility model;

[0019] Figure 5 for Figure 4 An enlarged diagram of B in the diagram. Detailed Implementation

[0020] Please see Figures 1-5This utility model provides a braking device for a Harley-Davidson electric vehicle, including a master cylinder 1, a first tee pipe 101, a mounting sleeve 102, a pull rod 2, a connecting shaft 201, a brake oil pipe 3, a brake caliper 4, a second tee pipe 401, a brake pad 402, a pipe body 403, a first limiting ring 4031, a piston rod 404, a second limiting ring 4041, a mounting base 405, a leak-proof mechanism 5, a first solenoid valve 501, a second solenoid valve 502, a flow sensor 503, a controller 504, an electronic power assist mechanism 6, a push rod 601, a third limiting ring 6011, a screw hole 602, a micro motor 603, and a screw 604.

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0023] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0024] A pull rod 2 is rotatably mounted on the master cylinder 1 via a connecting shaft 201. A first tee pipe 101 is connected to the outer surface of the master cylinder 1, and brake fluid lines 3 are connected to both ends of the first tee pipe 101. A second tee pipe 401 is connected to the outer surface of the brake caliper 4, and the ends of the two brake fluid lines 3 are respectively connected to the two ends of the second tee pipe 401. A leak-proof mechanism 5 is provided on the first tee pipe 101, the brake fluid lines 3, and the second tee pipe 401. A tube body 403 is installed inside the brake caliper 4, and a piston rod 404 is provided inside the tube body 403. The end of the piston rod 404 slides through to the outside of the brake caliper 4 and is provided with a brake pad 402. An electronic power assist mechanism 6 is provided inside the piston rod 404. A mounting sleeve 102 is installed on the outer surface of the master cylinder 1, and a mounting base 405 is installed on the outer surface of the brake caliper 4.

[0025] The master cylinder 1 is mounted on the handlebar of the vehicle body using the mounting sleeve 102, and the brake calipers 4 are mounted on both sides of the brake discs of the wheels using the mounting bracket 405. When braking, the driver presses the lever 2, which pressurizes the hydraulic oil inside the master cylinder 1 under the action of the piston. The hydraulic oil flows from the first three-way pipe 101 into the two brake lines 3, then merges from the two brake lines 3 into the second three-way pipe 401, and finally enters the brake caliper 4. The hydraulic oil in the brake caliper 4 enters the pipe body 403, which pushes the piston rod 404 to move, thereby pushing the brake pads 402 to contact the brake discs of the wheels, achieving the purpose of braking.

[0026] It is worth noting that the brake master cylinder 1 is a common existing technology, so its internal structure and working principle will not be described in detail here.

[0027] When one of the brake lines 3 bursts, the leak-stopping mechanism 5 will stop the leak in the burst brake line 3, preventing hydraulic oil leakage from affecting the use of the hydraulic system. The hydraulic oil can still flow from the other brake line 3 into the brake caliper 4 to provide braking effect, thereby greatly improving safety during driving. In addition, by stopping the hydraulic oil leak, the waste of hydraulic oil and pollution to the vehicle body and the surrounding environment can be reduced, which is environmentally friendly.

[0028] For female drivers or drivers with less arm strength, when the lever 2 is pressed, the electronic power assist mechanism 6 provides electronic assistance to the displacement of the brake pad 402. This allows the brake pad 402 to be pushed by the hydraulic oil while also being pushed by electronic assistance, thus significantly shortening the braking distance and improving the driving safety of female drivers or drivers with less arm strength.

[0029] Please see Figure 1 and Figure 2The leak-stopping mechanism 5 includes two first solenoid valves 501 disposed at both ends of the first tee pipe 101, two second solenoid valves 502 disposed at both ends of the second tee pipe 401, and two flow sensors 503 disposed on the two brake oil pipes 3. A controller 504 is disposed on the top of the brake master cylinder 1, and the first solenoid valves 501, second solenoid valves 502 and flow sensors 503 are all electrically connected to the controller 504.

[0030] Under normal circumstances, the flow rate inside the two brake oil pipes 3 is the same. When one of the brake oil pipes 3 bursts, the flow rate inside that brake oil pipe 3 will increase rapidly due to the brief and rapid leakage of hydraulic oil. Therefore, by monitoring the flow rate inside the two brake oil pipes 3, when the flow rate of one of them increases significantly, the controller 504 can control the first solenoid valve 501 and the second solenoid valve 502 corresponding to that brake oil pipe 3 to close, thereby blocking the continuous leakage of hydraulic oil.

[0031] Please see Figure 3 and Figure 5 The electronic assist mechanism 6 includes a push rod 601 disposed inside the piston rod 404, the end of which slides through to the outside of the piston rod 404. A threaded hole 602 is provided inside the push rod 601. A micro motor 603 is installed inside the piston rod 404. The output shaft of the micro motor 603 is connected to the screw 604, which is inserted into and threadedly connected to the screw hole 602. The micro motor 603 is electrically connected to the controller 504.

[0032] When the hydraulic oil pushes the piston rod 404 to move, the piston rod 404 drives the push rod 601 to push the brake pad 402 to move. At the same time, the micro motor 603 drives the screw 604 to rotate. Under the action of the threaded connection, the push rod 601 can be driven to extend and retract. Therefore, the push rod 601 is simultaneously subjected to two forces: the push of the hydraulic oil and the drive of the micro motor 603. This shortens the braking distance and improves the driving safety of female drivers or drivers with less arm strength.

[0033] A torque sensor is installed on the connecting shaft 201, and the torque sensor is electrically connected to the controller 504.

[0034] When the lever 2 is pressed, it drives the connecting shaft 201 to rotate. The rotation of the lever 2 is monitored by the torque sensor. The controller 504 can send a control signal to the micro motor 603 to provide additional electronic assistance to the brake pad 402.

[0035] The end of the tube body 403 is provided with a first limiting ring 4031, the end of the piston rod 404 is provided with a second limiting ring 4041, and the outer surface of the push rod 601 is provided with a third limiting ring 6011.

[0036] The first limiting ring 4031 prevents the piston rod 404 from detaching from the inside of the tube 403; the second limiting ring 4041 and the third limiting ring 6011 also prevent the piston rod 404 from detaching from the inside of the tube 403, thus ensuring the structural stability of the entire system.

[0037] The specific workflow and working principle of this device are as follows.

[0038] When braking, the driver presses lever 2, causing hydraulic oil to flow from the first three-way pipe 101 into the two brake lines 3, then from the two brake lines 3 into the second three-way pipe 401, and finally into the brake caliper 4. The hydraulic oil in the brake caliper 4 enters the pipe body 403, pushing the piston rod 404 to move, which in turn pushes the brake pads 402 to contact the brake disc of the wheel, achieving braking. If one of the brake lines 3 bursts, the flow rate in that line 3 will increase rapidly. Utilizing this characteristic, the controller 504 controls the first solenoid valve 501 and the second solenoid valve 502 corresponding to that brake line 3 to close, stopping the continuous leakage of hydraulic oil. Hydraulic oil can still flow from the other brake line 3 into the brake caliper 4 to provide braking effect, thereby significantly improving driving safety. Furthermore, for female drivers or drivers with less arm strength, when the lever 2 is pressed, the torque sensor monitors the rotation of the lever 2 and sends a control signal to the micro motor 603 through the controller 504. The micro motor 603 drives the screw 604 to rotate, and under the action of the threaded connection, it can drive the push rod 601 to extend and retract. Therefore, the push rod 601 is simultaneously pushed by the hydraulic oil and driven by the micro motor 603, which shortens the braking distance and improves the driving safety of female drivers or drivers with less arm strength.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A braking device for a Harley-Davidson electric vehicle, comprising a master cylinder (1) and a brake caliper (4), characterized in that: A pull rod (2) is rotatably mounted on the master cylinder (1) via a connecting shaft (201). A first tee pipe (101) is connected to the outer surface of the master cylinder (1). Both ends of the first tee pipe (101) are connected to brake oil pipes (3). The outer surface of the brake caliper (4) is connected to a second three-way pipe (401), and the ends of the two brake oil pipes (3) are respectively connected to the two ends of the second three-way pipe (401). A leak-proof mechanism (5) is provided on the first three-way pipe (101), the brake oil pipes (3) and the second three-way pipe (401). The brake caliper (4) has a tube (403) installed inside, and a piston rod (404) is provided inside the tube (403). The end of the piston rod (404) slides through to the outside of the brake caliper (4) and is provided with a brake pad (402). An electronic power assist mechanism (6) is provided inside the piston rod (404).

2. The braking device for a Harley-Davidson electric vehicle according to claim 1, characterized in that: The leak-stopping mechanism (5) includes two first solenoid valves (501) disposed at both ends of the first three-way pipe (101), two second solenoid valves (502) disposed at both ends of the second three-way pipe (401), and two flow sensors (503) disposed on the two brake oil pipes (3). The brake master cylinder (1) is equipped with a controller (504) on top, and the first solenoid valve (501), the second solenoid valve (502) and the flow sensor (503) are all electrically connected to the controller (504).

3. The braking device for a Harley-Davidson electric vehicle according to claim 2, characterized in that: The electronic assist mechanism (6) includes a push rod (601) disposed inside the piston rod (404), the end of the push rod (601) sliding through to the outside of the piston rod (404); The push rod (601) has a screw hole (602) inside, and a micro motor (603) is installed inside the piston rod (404). The output shaft of the micro motor (603) is connected to the screw (604), and the screw (604) is inserted into the screw hole (602) and threadedly connected to it. The micro motor (603) is electrically connected to the controller (504).

4. The braking device for a Harley-Davidson electric vehicle according to claim 3, characterized in that: A torque sensor is installed on the connecting shaft (201), and the torque sensor is electrically connected to the controller (504).

5. The braking device for a Harley-Davidson electric vehicle according to claim 3, characterized in that: The end of the tube (403) is provided with a first limiting ring (4031), the end of the piston rod (404) is provided with a second limiting ring (4041), and the outer surface of the push rod (601) is provided with a third limiting ring (6011).

6. The braking device for a Harley-Davidson electric vehicle according to claim 1, characterized in that: The outer surface of the master cylinder (1) is fitted with a mounting sleeve (102), and the outer surface of the brake caliper (4) is fitted with a mounting base (405).

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