Brake pedal simulator and brake-by-wire pedal

Abstract

The utility model discloses a brake pedal simulator and a brake-by-wire pedal. The brake pedal simulator comprises a sensor (10), an electric control unit (20), a piston assembly (30), a cylinder body (40), a driving assembly (50) and a damping piece (60), the sensor is disposed on the brake pedal and is configured to collect travel information of the brake pedal. The electric control unit is in signal connection with the sensor to receive the stroke information and calculate and generate a driving signal. The piston assembly comprises a push rod (32) and a piston cylinder (36). The push rod is connected with the brake pedal and movably inserted into the piston cylinder. The cylinder body is connected with the piston barrel, and a cavity (42) is formed in the cylinder body. The driving assembly is connected with the cylinder body and is in signal connection with the electric control unit. The damping piece is controlled by the driving assembly to move in the cavity in the length direction of the cylinder body. When the brake pedal conducts braking, the push rod moves in the braking direction, the cavity is in the stressed state, meanwhile, the damping piece provides feedback force opposite to the braking direction, and the driving assembly receives a driving signal to control the damping piece to move in the braking direction so as to change the feedback force. According to the pedal simulator, feedback of the pedal becomes diversified, and good driving experience is brought to a driver. In addition, a brake-by-wire pedal is also provided.

Description

Technical Field

[0001] The utility model relates to the field of automobiles, in particular to a brake pedal simulator and a brake pedal comprising the same. Background Art

[0002] The brake pedal is the control unit of the car's brakes, and the feedback force of the pedal can be clearly felt subjectively during the driving process. The brake-by-wire system completely abandons the brake fluid and hydraulic pipelines of the traditional brake system. The braking force is generated by the motor drive, and an electronic mechanical brake that can work independently is installed on each wheel. At this time, the brake pedal is just a sensor that converts human braking action into a signal. However, people's driving habits require the brake pedal to give people a certain pedal force feedback according to different braking depths. At present, the brake pedal itself cannot achieve the feedback of the brake pedal force that is more in line with human feelings during braking. Utility Model Content

[0003] The utility model aims to provide a brake pedal simulator, which can identify the driver's braking action and provide pedal force feedback and has a simple structure.

[0004] Another object of the utility model is to provide a brake pedal, whose brake pedal simulator can identify the driver's braking action and provide pedal force feedback.

[0005] The brake pedal simulator provided by the utility model comprises a sensor, an electronic control unit, a piston assembly, a cylinder body, a driving assembly and a damping member. The sensor is arranged on the brake pedal and is configured to collect the travel information of the brake pedal. The electronic control unit is connected to the sensor by signal to receive the travel information, and the electronic control unit calculates the travel information and generates a driving signal. The piston assembly comprises a push rod and a piston cylinder. The push rod is connected to the brake pedal and is movably plugged into the piston cylinder. The cylinder body is connected to the piston cylinder. A chamber is formed in the cylinder body. The driving assembly is connected to the cylinder body and is connected to the electronic control unit signal. The damping member is slidably arranged in the chamber, and the damping member is connected to the driving assembly and is controlled by the driving assembly to move along the length direction of the cylinder body. When the brake pedal is braked, the brake pedal pushes the push rod to move in a braking direction (the braking direction is parallel to the length direction of the cylinder body). At this time, the chamber is in a force state, and the damping member provides a feedback force opposite to the braking direction. At the same time, the driving assembly receives the driving signal to control the damping member to move in the braking direction to change the feedback force.

[0006] The brake pedal simulator provided by the utility model collects the travel information of the brake pedal through a sensor, utilizes an electronic control unit to process the travel information and synchronously controls the movement of the damping member, thereby providing different pedal force feedbacks, bringing a better driving experience, and has a streamlined structure and is easy to maintain.

[0007] In another exemplary embodiment of the brake pedal simulator, the driving assembly includes a base, a driving motor and an adjusting rod. The base is connected to the cylinder body. The driving motor is mounted on the base, and the driving motor signal is connected to the electronic control unit to receive the driving signal. The adjusting rod is rotatably connected to the driving motor, and the adjusting rod is inserted into the damping member to drive the damping member to slide.

[0008] In another exemplary embodiment of the brake pedal simulator, a gap is left between the damping member and the inner wall of the cylinder body. The damping member divides the chamber into a first chamber and a second chamber. The first chamber and the second chamber are connected through the gap.

[0009] In another exemplary embodiment of the brake pedal simulator, the brake pedal simulator further includes a reset assembly. The reset assembly includes a sealing ring and a first reset spring. The sealing ring is disposed in the second chamber and separates the second chamber to form a third chamber. The first reset spring is disposed in the third chamber. Two ends of the first reset spring abut against the sealing ring and the inner wall of the cylinder body, respectively.

[0010] In another exemplary embodiment of the brake pedal simulator, an oil inlet hole is provided at one end of the cylinder body connected to the piston assembly, and the oil inlet hole is connected to the first chamber.

[0011] In another exemplary embodiment of the brake pedal simulator, a piston chamber is formed in the piston cylinder. An oil outlet hole is opened at one end of the piston cylinder and connected to the piston chamber. The oil outlet hole and the oil inlet hole are arranged correspondingly so that the piston chamber is connected to the first chamber.

[0012] In another exemplary embodiment of the brake pedal simulator, the piston assembly further includes a piston and a second return spring. The piston is movably disposed in the piston cavity along the braking direction and the reverse direction. The push rod is connected to the piston. The second return spring is disposed in the piston cavity. Two ends of the second return spring abut against the piston and the inner wall of the piston cylinder, respectively.

[0013] In another exemplary embodiment of the brake pedal simulator, the piston assembly further comprises a limiting ring. The limiting ring is sleeved on the end of the piston cylinder away from the oil outlet hole. The push rod is penetrated through the limiting ring and connected to the piston.

[0014] In another exemplary embodiment of the brake pedal simulator, the piston assembly further includes two buffer members, which are respectively arranged at two ends of the piston cavity and respectively adhere to the inner wall of the piston cylinder.

[0015] The utility model also provides a brake pedal, which includes a brake pedal simulator, a pedal seat and a pedal arm. The pedal seat is arranged on the instrument pipe beam. The pedal arm is rotatably arranged on the pedal seat. The pedal arm is connected to the push rod. The sensor is arranged on the pedal arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following drawings are only used to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0017] Figure 1 The figure is a schematic structural diagram of a schematic implementation of a brake pedal simulator.

[0018] Figure 2 for Figure 1 A cross-sectional view of the brake pedal simulator is shown.

[0019] Figure 3 for Figure 1 A sectional view of a portion of the structure of the brake pedal simulator is shown.

[0020] Figure 4 The figure is a schematic structural diagram of a schematic implementation of a brake pedal.

[0021] Description of symbols

[0022] 10 Sensors

[0023] 20 Electronic Control Unit

[0024] 30 Piston assembly

[0025] 31 Limiting ring

[0026] 32 Putter

[0027] 33 Buffer

[0028] 34 Piston

[0029] 36 Piston Cylinder

[0030] 38 Second return spring

[0031] 40 Cylinder

[0032] 41 Gap

[0033] 42 Chamber

[0034] 43 Oil inlet hole

[0035] 421 First Chamber

[0036] 423 Second Chamber

[0037] 4231 Third Chamber

[0038] 50 Drive components

[0039] 52 Base

[0040] 54 Drive Motor

[0041] 56 Adjustment lever

[0042] 60 Damping element

[0043] 70 Reset assembly

[0044] 72 Sealing ring

[0045] 74 First return spring

[0046] 100 Pedal seat

[0047] 200 Pedal Arm

[0048] F Braking direction. DETAILED DESCRIPTION

[0049] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings. The same reference numerals in the drawings represent components with the same structure or similar structures but the same functions.

[0050] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0051] Figure 1 The figure is a schematic structural diagram of a schematic implementation of a brake pedal simulator. Figure 4 FIG. 1 is a schematic diagram of a brake pedal. The brake pedal simulator is a part of the brake pedal and is used to generate a corresponding pedal feedback force when the brake pedal is braking. Figure 1 and Figure 4 As shown, the brake pedal simulator includes a sensor 10, an electronic control unit 20, a piston assembly 30, a cylinder 40, a drive assembly 50 and a damping member 60. When the brake pedal is applied, the piston assembly 30 is forced to move in the braking direction F to apply pressure to the cylinder 40. At this time, the damping member 60 located in the cylinder 40 can provide a feedback force opposite to the braking direction F. At the same time, the sensor 10 collects the relevant travel information of the brake pedal and transmits it to the electronic control unit 20. The electronic control unit 20 calculates the travel information and generates a drive signal to transmit to the drive assembly 50, thereby controlling the movement of the damping member 60 to change the magnitude of the feedback force, thereby making the feedback of the pedal diversified and bringing a better driving experience to the driver.

[0052] like Figure 4As shown, the sensor 10 is arranged on the brake pedal so as to monitor the brake pedal more accurately. The sensor 10 is configured to collect the travel information of the brake pedal, specifically, the travel information includes the displacement of the brake pedal in the braking direction when braking, and the time required to complete the displacement (i.e., equivalent to collecting the force magnitude of the brake pedal). The electronic control unit 20 is connected to the sensor 10 to receive the travel information, specifically, the electronic control unit 20 is an ECU module, but not limited thereto. The electronic control unit 20 calculates the travel information and generates a driving signal. In this exemplary embodiment, different driving modes (such as general mode, off-road mode and light mode) are also stored in the electronic control unit 20, and each driving mode corresponds to a driving signal. The electronic control unit 20 transmits the corresponding driving signal to the driving assembly 50 according to the driver's selection, and controls the driving assembly 50 to drive the damping member 60 to move to an initial position. When the driver drives in the selected driving mode and brakes, the damping member 60 starts to move along the braking direction F at the initial position and returns to the initial position when the braking ends. Among them, each driving mode corresponds to a corresponding initial position, and by calibrating a variety of pedal feels (pedal feedback forces) to match the vehicle's various driving modes, it can bring users a better driving experience.

[0053] Figure 2 for Figure 1 A cross-sectional view of a brake pedal simulator is shown in FIG. Figure 2 As shown, the piston assembly 30 includes a push rod 32 and a piston cylinder 36. The push rod 32 is connected to the brake pedal and driven by the brake pedal to be movably inserted into the piston cylinder 36 along the braking direction F. A piston chamber 361 is formed in the piston cylinder 36, wherein the piston chamber 361 is filled with oil. An oil outlet hole 362 is formed at one end of the piston cylinder 36 and is connected to the piston chamber 361, so that the oil can flow into the cylinder body 40.

[0054] like Figure 2 As shown, in this exemplary embodiment, the piston assembly 30 further includes a piston 34 and a second return spring 38. The piston 34 is movably disposed in the piston chamber 361 along the braking direction F and the opposite direction thereof, and the push rod 32 is connected to the piston 34. Specifically, when the brake pedal is applied, the brake pedal drives the push rod 32 along the braking direction F, and at the same time drives the piston 34 to move in the piston chamber 361 along the braking direction F, thereby causing the oil in the piston chamber 361 to flow along the braking direction F. The second return spring 38 is disposed in the piston chamber 361, and the two ends of the second return spring 38 abut against the inner wall of the piston 34 and the piston cylinder 36, respectively, so that the push rod 32 and the piston 34 can be reset in time when the brake pedal is released.

[0055] Figure 3 for Figure 1A cross-sectional view of a portion of the structure of the brake pedal simulator is shown. Figure 2 and Figure 3 As shown, a chamber 42 is formed in the cylinder body 40. In this exemplary embodiment, the cylinder body 40 is cylindrical, but is not limited thereto. Figure 3 As shown, the damping member 60 is slidably disposed in the chamber 42. In this exemplary embodiment, the damping member 60 may be, for example, a threaded sleeve, but is not limited thereto. A gap 41 is left between the damping member 60 and the inner wall of the cylinder body 40. The damping member 60 divides the chamber 42 into a first chamber 421 and a second chamber 423, and the first chamber 421 and the second chamber 423 are connected through the gap 41.

[0056] An oil inlet hole 43 is formed at one end of the cylinder body 40 connected to the piston assembly 30, and the oil inlet hole 43 is connected to the first chamber 421. The oil inlet hole 43 is arranged corresponding to the oil outlet hole 362, so that the first chamber 421 is connected to the piston chamber 361, so that the oil in the piston chamber 361 can flow into the cylinder body 40, enter the first chamber 421 and enter the second chamber 423 through the gap 41.

[0057] like Figure 3 As shown, in this schematic embodiment, the drive assembly 50 includes a base 52, a drive motor 54 and an adjustment rod 56. The base 52 is connected to the cylinder body 40. The drive motor 54 is installed on the base 52 to facilitate later disassembly and maintenance. The drive motor 54 signal is connected to the electronic control unit 20 to receive the drive signal and the driving signal. The adjustment rod 56 is rotatably connected to the drive motor 54, and the adjustment rod 56 is inserted into the damping member 60 to drive the damping member 60 to slide along the braking direction F and the opposite direction. By changing the position of the damping member 60 in the chamber 42, the flow of oil from the first chamber 421 through the gap 41 into the second chamber 423 is controlled, thereby forming a change in the feedback force provided to the brake pedal by the damping member 60, giving the driver a different pedal feel.

[0058] like Figure 2 and Figure 3 As shown, in this schematic embodiment, the brake pedal simulator also includes a reset assembly 70. It includes a sealing ring 72 and a first reset spring 74. The sealing ring 72 is arranged in the second chamber 423 and separates the second chamber 423 to form a third chamber 4231. At the same time, the sealing ring 72 can effectively prevent the entry of oil, thereby ensuring the stability of the reset assembly 70. The first reset spring 74 is arranged in the third chamber 4231, and the two ends of the first reset spring 74 respectively abut the sealing ring 72 and the inner wall of the cylinder body 40, so that the oil can flow back to the piston chamber 361 when the brake pedal is canceled, and ensure that the brake pedal can be reset in time.

[0059] like Figure 2 and Figure 3 As shown, in this exemplary embodiment, the plug assembly 30 further includes a stop ring 31 and two buffers 33. The stop ring 31 is sleeved on the end of the piston cylinder 36 away from the oil outlet 362, and the push rod 32 is passed through the stop ring 31 to connect the piston 34, thereby preventing the piston 34 from falling off. The two buffers 33 are respectively arranged at both ends of the piston cavity 361 and are respectively attached to the inner wall of the piston cylinder 36, so that the brake pedal can have good buffering during emergency braking, ensuring the stability of the brake pedal.

[0060] The utility model also provides a wire-controlled brake pedal. Figure 4 As shown, in the exemplary embodiment, the brake-by-wire pedal includes a brake pedal simulator, a pedal seat 100 and a pedal arm 200. The pedal seat 100 is disposed on the instrument tube beam. The pedal arm 200 is rotatably disposed on the pedal seat 100, the pedal arm 200 is connected to the push rod 32, and the sensor 10 is disposed on the pedal arm 200, so as to more accurately monitor the travel information of the brake pedal.

[0061] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0062] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present utility model. They are not intended to limit the scope of protection of the present utility model. Any equivalent implementation scheme or changes that do not deviate from the technical spirit of the present utility model, such as combination, division or repetition of features, should be included in the scope of protection of the present utility model.

Claims

1. A brake pedal simulator capable of providing feedback force when the brake pedal is braking, characterized in that: The brake pedal simulator comprises: a sensor (10) disposed on the brake pedal, the sensor (10) being configured to collect travel information of the brake pedal; an electronic control unit (20), whose signal is connected to the sensor (10) to receive the travel information, and the electronic control unit (20) calculates the travel information and generates a driving signal; A piston assembly (30) comprising a push rod (32) and a piston cylinder (36), wherein the push rod (32) is connected to the brake pedal and is movably inserted into the piston cylinder (36); a cylinder body (40) connected to the piston cylinder (36), wherein a chamber (42) is formed in the cylinder body (40); a drive assembly (50) connected to the cylinder (40) and connected to the electronic control unit (20) via a signal; and a damping member (60) slidably disposed in the chamber (42), the damping member (60) being connected to the driving assembly (50) and being controlled by the driving assembly (50) to move along the length direction of the cylinder (40), When the brake pedal is applied, the brake pedal pushes the push rod (32) to move in a braking direction (F), and the braking direction (F) is parallel to the length direction of the cylinder (40). At this time, the chamber (42) is in a stressed state, and the damping element (60) provides the feedback force opposite to the braking direction (F). At the same time, the driving component (50) receives the driving signal to control the damping element (60) to move in the braking direction (F) to change the feedback force.

2. The brake pedal simulator according to claim 1, characterized in that The driving assembly (50) comprises: a base (52) connected to the cylinder (40); a driving motor (54) mounted on the base (52), the driving motor (54) being signal-connected to the electric control unit (20) to receive the driving signal; and An adjusting rod (56) is rotatably connected to the driving motor (54); the adjusting rod (56) is inserted into the damping member (60) to drive the damping member (60) to slide.

3. The brake pedal simulator according to claim 1, characterized in that: A gap (41) is left between the damping member (60) and the inner wall of the cylinder body (40), and the damping member (60) divides the chamber (42) into a first chamber (421) and a second chamber (423), and the first chamber (421) and the second chamber (423) are connected via the gap (41).

4. The brake pedal simulator according to claim 3, characterized in that The brake pedal simulator further comprises a reset component (70) comprising: a sealing ring (72), which is disposed in the second chamber (423) and separates the second chamber (423) to form a third chamber (4231); and A first return spring (74) is arranged in the third chamber (4231), with two ends of the first return spring (74) respectively abutting against the sealing ring (72) and the inner wall of the cylinder body (40).

5. The brake pedal simulator according to claim 3, characterized in that: An oil inlet hole (43) is formed at one end of the cylinder body (40) connected to the piston assembly (30), and the oil inlet hole (43) is in communication with the first chamber (421).

6. The brake pedal simulator according to claim 5, characterized in that A piston chamber (361) is formed in the piston cylinder (36), and an oil outlet hole (362) is formed at one end of the piston cylinder (36) and communicates with the piston chamber (361). The oil outlet hole (362) and the oil inlet hole (43) are arranged correspondingly, so that the piston chamber (361) is communicated with the first chamber (421).

7. The brake pedal simulator according to claim 6, characterized in that The piston assembly (30) further comprises: a piston (34) movably disposed in the piston chamber (361) along the braking direction (F) and the opposite direction, the push rod (32) being connected to the piston (34); and A second return spring (38) is disposed in the piston chamber (361), with two ends of the second return spring (38) respectively abutting against the piston (34) and the inner wall of the piston cylinder (36).

8. The brake pedal simulator according to claim 7, characterized in that The piston assembly (30) further comprises a limiting ring (31), wherein the limiting ring (31) is sleeved on the end of the piston cylinder (36) away from the oil outlet hole (362), and the push rod (32) passes through the limiting ring (31) and is connected to the piston (34).

9. The brake pedal simulator according to claim 6, characterized in that: The piston assembly (30) further comprises two buffer components (33), the two buffer components (33) being respectively arranged at two ends of the piston cavity (361) and respectively attached to the inner wall of the piston cylinder (36).

10. A brake-by-wire pedal, characterized in that: include: A brake pedal simulator as claimed in any one of claims 1 to 7; A pedal seat (100) is arranged on the instrument pipe beam; as well as A pedal arm (200) is rotatably arranged on the pedal seat (100), the pedal arm (200) is connected to the push rod (32), and the sensor (10) is arranged on the pedal arm (200).

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