Wheel end balance type disc type EPB with ECU control function

Abstract

The invention discloses a wheel end balance type disc-type EPB with ECU control, and belongs to the technical field of automobile braking, the wheel end balance type disc-type EPB with ECU control comprises a brake disc, the outer wall of the brake disc is provided with two EPB disc-type brake mechanisms, the outer walls of the two EPB disc-type brake mechanisms are fixedly connected with control wire harnesses, and the control wire harnesses are fixedly connected with the brake disc. An electronic control unit is installed between the two control wire harnesses, and a hub mechanism is arranged on one side of the brake disc. By designing the EPB disc type brake mechanisms, the two EPB disc type brake mechanisms are evenly distributed on the brake disc, so that parts in the EPB disc type brake mechanisms are stressed more reasonably in the braking process, the ECU transmits signals to the EPB disc type brake mechanism needing to be controlled through the control wire harness, and the brake disc type brake is more stable in braking. Software control can be triggered to carry out autonomous control when an emergency situation occurs in the vehicle, and an irreplaceable hardware basis is particularly provided for subsequent unmanned driving at the L3 level or above.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile brakes, and in particular relates to a wheel-end balanced disc EPB controlled by an ECU. Background Art

[0002] With the guidance of national policies, the introduction of relevant laws and regulations, and continuous technological breakthroughs and innovations, the market share of new energy light trucks has increased significantly, especially urban logistics vehicles, which have good operating conditions and strict control over overloading and overlimit, especially in terms of restrictions on 4.5T blue-plate vehicles and various factors such as the commercial purpose of vehicles. Vehicle overloading will be effectively curbed. In order to meet the blue-plate and multi-load requirements, the vehicle's curb weight is required to be as light as possible. The above market environment is mainly reflected in the fact that the braking system does not need to provide excess braking torque for commercial vehicle braking systems, because in order to adapt to overload braking systems, vehicles previously reserved a very high safety factor in supporting the matching system. The braking torque of the hydraulic brake system of the same specification is about 1 / 3 weaker than that of the pneumatic brake system, but the weight is 1 / 6 of the conventional one or even lower. Therefore, more and more light commercial vehicles use hydraulic brake systems.

[0003] Hydraulic disc brakes are used in dual-cylinder state in supporting light vehicles to meet the braking torque requirements. Due to its unique braking mechanism, the brake only acts on about 1 / 3 of the brake disc during braking, which will inevitably lead to rotational torque at the braking wheel end due to the braking torque, affecting the life of the wheel end braking mechanism and creating other functional use risks for the disc brake. Hydraulic disc brakes may also have abnormal faults such as brake failure, endangering the braking safety of the vehicle. At the same time, due to the limitations of existing technical solutions, general light commercial vehicles adopt a comprehensive solution of wheel-end service brakes and central drive shaft parking brakes, which are often limited by the space limitations of the central drive shaft and multi-stage transmission. For vehicles with slightly larger tonnage, large slope parking weakness and parking slippage often occur. At present, it is often relied on to add anti-slip brake devices to the rear wheels after parking to improve parking safety, which is time-consuming and labor-intensive and the effect is not ideal. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a wheel-end balancing disc EPB with ECU control.

[0005] The technical solution adopted to solve the above technical problems is: a wheel-end balanced disc EPB with ECU control, comprising a brake disc, the brake disc is provided with a plurality of mounting holes, the outer wall of the brake disc is provided with two EPB disc brake mechanisms, the outer walls of the two EPB disc brake mechanisms are fixedly connected with control harnesses, and an electronic control unit is installed between the two control harnesses;

[0006] A bearing is installed inside the brake disc, a screw hole corresponding to the mounting hole is opened on one side of the bearing, a gear ring is installed on the outer wall of the bearing, a connecting plate is fixedly connected to the other side of the brake disc, a maintenance-free steering knuckle is installed on the other side of the connecting plate, and a wheel hub mechanism is provided on one side of the brake disc.

[0007] Furthermore, the EPB disc brake mechanism includes a bracket installed on the outer wall of the brake disc, one side of the bracket is rotatably connected to two mounting screws, two retaining springs are installed inside the bracket, an inner friction plate is fixedly connected between the two retaining springs, a caliper body is fixedly connected to the front end of the bracket, two mounting bolts are rotatably connected between the caliper body and the bracket, a piston is installed inside the caliper body, a second friction plate is installed at the output end of the piston, and a control component is installed on one side of the caliper body.

[0008] Through the above technical solution, the ECU electronic control unit is arranged inside the vehicle. When the driver operates the electronic parking brake switch, the signal is transmitted to the electronic control unit. The electronic control unit processes and judges the signal. When it is confirmed that the parking brake operation needs to be performed, the corresponding control command will be sent to the EPB disc brake mechanism through the control harness, and the control component will start working. The mechanical force generated by the control component is transmitted to the piston inside the caliper body to push the piston forward. As the piston moves, the second friction plate is pushed toward the brake disc. At the same time, the inner friction plate inside the bracket is also tightly attached to the other side of the brake disc under the action of the retaining spring. The brake disc is clamped between the inner friction plate and the second friction plate, generating friction to stop the wheel from rotating and realize parking braking. When the driver operates the switch to release the parking brake again, the corresponding signal is transmitted to the electronic control unit. After the electronic control unit judges, it sends a release command to the control component. After receiving the command, the control component performs a reverse action to cancel the thrust on the piston. The second friction plate is separated from the brake disc, and the inner friction plate is also disengaged from the brake disc under the action of the elastic restoring force of the retaining spring. The brake disc can rotate freely and the parking brake is released.

[0009] Furthermore, the two EPB disc brake mechanisms are symmetrically mounted on the outer wall of the brake disc.

[0010] Through the above technical scheme, the symmetrical structure can avoid excessive vibration of the brake disc end face due to a single brake clamping the brake disc fan-shaped area during the braking process, and force deviation with the hub mechanism on the rotation axis, affecting the braking safety and stability of the braking components. The two balanced layouts increase the contact area between the brake lining and the brake disc inside the EPB disc brake mechanism to a certain extent, which can effectively avoid high temperature and increase the service life of the brake lining of the EPB disc brake mechanism.

[0011] Furthermore, outer walls of the inner friction plate and the second friction plate are attached to the outer wall of the brake disc.

[0012] Through the above technical solution, the friction plates on both sides evenly fit the outer wall of the brake disc, which can ensure that the braking torque applied to the wheels is uniform and stable during braking, preventing the wheels from unilateral braking or uneven braking. This allows the vehicle to maintain a straight driving state during braking, avoid deviation or skidding, and improve the handling stability and safety during braking.

[0013] Furthermore, a movable part is installed inside the control component, and one side of the movable part is connected to the piston.

[0014] Through the above technical solution, the movable part can accurately transmit the force generated by the control component to the piston. Under different braking requirements, the control component can accurately push the piston to move different distances through the movable part, thereby accurately controlling the braking force, so that the braking effect is highly matched with the driver's operating intention.

[0015] Furthermore, the control component is connected to a corresponding control harness.

[0016] Through the above technical solution, the control harness can accurately transmit various control signals issued by the electronic control unit to related actuators or other systems to achieve precise braking operations.

[0017] Furthermore, the hub mechanism includes a hub flange installed on one side of the brake disc, the outer side of the hub flange is rotatably connected with a plurality of hub nuts and hexagonal bolts, and a hub cover is installed at the center of the outer side of the hub flange.

[0018] Through the above technical solution, the hub flange is connected to the bearing inside the brake disc through the hexagonal bolts to form a rotating component that is synchronized with the wheel.

[0019] Furthermore, the hexagonal bolt passes through the corresponding mounting hole and is connected to the screw hole.

[0020] Through the above technical solution, the positions of the mounting holes and screw holes are pre-designed and processed, and the hexagonal bolts pass through them, which can accurately determine the relative positions of the connected components and ensure that each component can achieve the design accuracy after installation.

[0021] Through the above technical solution,

[0022] The beneficial effects of the present invention are as follows: (1) The present invention designs an EPB disc brake mechanism to evenly distribute two EPB disc brake mechanisms on the brake disc, so that the components inside the EPB disc brake mechanism are subjected to more reasonable forces during the braking process; (2) The present invention integrates an electronic parking function on the device, and can cancel the existing central parking brake. The ECU electronic control unit transmits a signal to the EPB disc brake mechanism to be controlled through the control harness, and can control the four wheels individually or simultaneously. The driving and parking forces of the four wheel ends can be controlled individually, and the braking ratio of the vehicle can be better allocated during driving. In addition, when an emergency occurs in the vehicle, the software control can be triggered to perform autonomous control, especially for subsequent L3 level and above unmanned driving. Provides an irreplaceable hardware foundation; (3) The present invention can effectively solve the problem of unbalanced force on the wheel end components caused by overcoming the braking torque during braking in the current brake layout, and can effectively reduce the end face bounce of the wheel end rotating components, especially the brake disc, to ensure that the rotating components of the brake have no effect on the brake failure function after the brake is in contact with the brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a stereogram of the present invention;

[0024] Figure 2 is a side view of the present invention;

[0025] Figure 3 It is a schematic diagram of the connection plate structure of the present invention;

[0026] Figure 4 It is a schematic diagram of the internal structure of the brake disc of the present invention;

[0027] Figure 5 is a schematic diagram of the EPB disc brake mechanism of the present invention;

[0028] Figure 6 It is a schematic diagram of the internal structure of the pliers body of the present invention;

[0029] Figure 7 It is a schematic diagram of the hub mechanism of the present invention.

[0030] Figure numerals: 1. brake disc; 2. mounting hole; 3. EPB disc brake mechanism; 301. bracket; 302. mounting screw; 303. retaining spring; 304. inner friction plate; 305. caliper body; 306. mounting bolt; 307. piston; 308. second friction plate; 309. control assembly; 4. control wiring harness; 5. electronic control unit; 6. bearing; 7. screw hole; 8. gear ring; 9. connecting plate; 10. maintenance-free steering knuckle; 11. wheel hub mechanism; 1101. wheel hub flange; 1102. wheel hub nut; 1103. hexagonal bolt; 1104. wheel hub cover. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] like Figure 1 - Figure 6 As shown, a wheel-end balanced disc EPB with ECU control in this embodiment includes a brake disc 1, a plurality of mounting holes 2 are opened on the brake disc 1, and two EPB disc brake mechanisms 3 are arranged on the outer wall of the brake disc 1. The two EPB disc brake mechanisms 3 are symmetrically mounted on the outer wall of the brake disc 1. The symmetrical structure can prevent the end face of the brake disc 1 from jumping too much due to a single brake clamping the fan-shaped area of ​​the brake disc 1 during the braking process, and the force deviation with the wheel hub mechanism 11 at the rotation axis affects the braking safety and the stability of the braking components. The two balanced layouts increase the contact surface between the brake lining inside the EPB disc brake mechanism 3 and the brake disc 1 to a certain extent, which can effectively avoid high temperature and increase the service life of the brake lining of the EPB disc brake mechanism 3. The EPB disc brake mechanism 3 includes a bracket 301 mounted on the outer wall of the brake disc 1, one side of the bracket 301 is rotatably connected to two mounting screws 302, two retaining springs 303 are installed inside the bracket 301, and an inner friction plate 304 is fixedly connected between the two retaining springs 303.

[0033] like Figure 6As shown, the front end of the bracket 301 is fixedly connected with a caliper body 305, and two mounting bolts 306 are rotatably connected between the caliper body 305 and the bracket 301. A piston 307 is installed inside the caliper body 305, and a second friction plate 308 is installed at the output end of the piston 307. The outer walls of the inner friction plate 304 and the second friction plate 308 are attached to the outer wall of the brake disc 1, and the friction plates on both sides are evenly attached to the outer wall of the brake disc 1, which can ensure that the braking torque applied to the wheel is uniform and stable during the braking process, prevent the wheel from unilateral braking or uneven braking, so that the vehicle can maintain a straight-line driving state during braking, avoid deviation or tail swinging, and improve the control stability and safety during braking. A control component 309 is installed on one side of the caliper body 305. A movable part is installed inside the control component 309, and one side of the movable part is connected to the piston 307. The movable part can accurately transmit the force generated by the control component 309 to the piston 307. Under different braking requirements, the control component 309 can accurately push the piston 307 to move different distances through the movable part, thereby accurately controlling the braking force, so that the braking effect is highly matched with the driver's operating intention. The outer walls of the two EPB disc brake mechanisms 3 are fixedly connected with control harnesses 4, and the control component 309 is connected to the corresponding control harnesses 4. The control harnesses 4 can accurately transmit various control signals sent by the electronic control unit 5 to related actuators or other systems to achieve precise braking operations.

[0034] like Figure 1 - Figure 6 As shown, the ECU electronic control unit 5 is arranged inside the vehicle. When the driver operates the electronic parking brake switch, the signal is transmitted to the electronic control unit 5. The electronic control unit 5 processes and judges the signal. When it is confirmed that the parking brake operation needs to be performed, the corresponding control command is sent to the EPB disc brake mechanism 3 through the control harness 4. The control component 309 starts to work. The mechanical force generated by the control component 309 is transmitted to the piston 307 inside the caliper body 305, pushing the piston 307 forward. With the movement of the piston 307, the second friction plate 308 is pushed toward the brake disc 1. At the same time, the inner friction plate 304 inside the bracket 301 is under the action of the retaining spring 303. It also fits tightly to the other side of the brake disc 1. The brake disc 1 is clamped between the inner friction plate 304 and the second friction plate 308, generating friction, stopping the wheel from rotating and realizing parking brake. When the driver operates the switch to release the parking brake again, the corresponding signal is transmitted to the electronic control unit 5. After judgment, the electronic control unit 5 sends a release command to the control component 309. After receiving the command, the control component 309 performs a reverse action to cancel the thrust on the piston 307. The second friction plate 308 is separated from the brake disc 1. The inner friction plate 304 is also disengaged from the brake disc 1 under the elastic restoring force of the retaining spring 303. The brake disc 1 can rotate freely and the parking brake is released.

[0035] like Figure 1 - Figure 4 As shown, an electronic control unit 5 is installed between the two control harnesses 4, a bearing 6 is installed inside the brake disc 1, a screw hole 7 corresponding to the mounting hole 2 is opened on one side of the bearing 6, a gear ring 8 is installed on the outer wall of the bearing 6, a connecting plate 9 is fixedly connected to the other side of the brake disc 1, and a maintenance-free steering knuckle 10 is installed on the other side of the connecting plate 9.

[0036] like Figure 7 As shown, the wheel hub mechanism 11 includes a wheel hub flange 1101 installed on one side of the brake disc 1, and the outer sides of the wheel hub flange 1101 are rotatably connected with multiple wheel hub nuts 1102 and hexagonal bolts 1103, and the hexagonal bolts 1103 pass through the corresponding mounting holes 2 and are connected with the screw holes 7. The positions of the mounting holes 2 and the screw holes 7 are pre-designed and processed, and the hexagonal bolts 1103 pass through them, which can accurately determine the relative positions of the connected components and ensure that each component can achieve the design accuracy after installation. A wheel hub cover 1104 is installed at the center position of the outer side of the wheel hub flange 1101, and the wheel hub flange 1101 is connected to the bearing 6 inside the brake disc 1 through the hexagonal bolts 1103 to form a rotating component synchronized with the wheel.

[0037] The working principle of this embodiment is as follows: because the wheel hub flange 1101 is connected to the bearing 6 inside the brake disc 1 through the hexagonal bolt 1103 to form a rotating component that is synchronized with the wheel, before braking, the wheel hub mechanism 11 and the brake disc 1 rotate synchronously. When the driver needs to brake, the signal is transmitted to the electronic control unit 5, and the electronic control unit 5 will send a corresponding control instruction to the EPB disc brake mechanism 3 through the control harness 4, so that the brake disc 1 is clamped between the inner friction plate 304 and the second friction plate 308, generating friction, so that the wheel stops rotating and the parking brake is realized. When the driver operates the switch to release the parking brake again, the corresponding signal is transmitted to the electronic control unit 5, and the electronic control unit 5 sends a release instruction to the control component 309 after judgment, so that the friction plate is separated from the brake disc 1, and the brake disc 1 can rotate freely, and the parking brake is released;

[0038] At the same time, when executing the parking command, the ECU electronic control unit 5 transmits the signal to the EPB disc brake mechanism 3 that needs to be controlled through the control harness 4. It can control the four wheels individually or simultaneously. According to the tonnage and parking angle of the whole vehicle and the calibration of the whole vehicle, four-wheel or two-wheel parking can be achieved simultaneously. Especially for the control of the energy consumption of new energy vehicles on the weight of the whole vehicle, while canceling the central parking brake, the specifications of the EPB disc brake mechanism 3 can be further reduced. On the premise of meeting the lightweight requirements and braking safety, the integrated and intelligent development of vehicle braking is further realized.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A wheel-end balanced disc EPB with ECU control, comprising a brake disc (1), characterized in that: The brake disc (1) is provided with a plurality of mounting holes (2); the outer wall of the brake disc (1) is provided with two EPB disc brake mechanisms (3); the outer walls of the two EPB disc brake mechanisms (3) are both fixedly connected with a control harness (4); an electronic control unit (5) is installed between the two control harnesses (4); A bearing (6) is installed inside the brake disc (1); a screw hole (7) corresponding to the mounting hole (2) is opened on one side of the bearing (6); a gear ring (8) is installed on the outer wall of the bearing (6); a connecting plate (9) is fixedly connected to the other side of the brake disc (1); a maintenance-free steering knuckle (10) is installed on the other side of the connecting plate (9); and a wheel hub mechanism (11) is provided on one side of the brake disc (1).

2. The wheel-end balanced disc EPB with ECU control according to claim 1, characterized in that: The EPB disc brake mechanism (3) comprises a bracket (301) mounted on the outer wall of a brake disc (1), one side of the bracket (301) is rotatably connected to two mounting screws (302), two retaining springs (303) are installed inside the bracket (301), an inner friction plate (304) is fixedly connected between the two retaining springs (303), a caliper body (305) is fixedly connected to the front end of the bracket (301), two mounting bolts (306) are rotatably connected between the caliper body (305) and the bracket (301), a piston (307) is installed inside the caliper body (305), a second friction plate (308) is installed at the output end of the piston (307), and a control component (309) is installed on one side of the caliper body (305).

3. The wheel-end balanced disc EPB with ECU control according to claim 2, characterized in that: The two EPB disc brake mechanisms (3) are symmetrically mounted on the outer wall of the brake disc (1).

4. The wheel-end balanced disc EPB with ECU control according to claim 2, characterized in that: The outer walls of the inner friction plate (304) and the second friction plate (308) are attached to the outer wall of the brake disc (1).

5. The wheel-end balanced disc EPB with ECU control according to claim 2, characterized in that: A movable part is installed inside the control component (309), and one side of the movable part is connected to the piston (307).

6. The wheel-end balanced disc EPB with ECU control according to claim 5, characterized in that: The control component (309) is connected to a corresponding control harness (4).

7. The wheel-end balanced disc EPB with ECU control according to claim 1, characterized in that, The wheel hub mechanism (11) comprises a wheel hub flange (1101) mounted on one side of the brake disc (1), a plurality of wheel hub nuts (1102) and hexagonal bolts (1103) being rotatably connected to the outer side of the wheel hub flange (1101), and a wheel hub cover (1104) being mounted at a center position on the outer side of the wheel hub flange (1101).

8. The wheel-end balanced disc EPB with ECU control according to claim 7, characterized in that: The hexagonal bolt (1103) passes through the corresponding mounting hole (2) and is connected to the screw hole (7).

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